View Full Version : Tópico da ciência
Sempre que há uma noticia interessante sobe ciência o pessoal coloca-a na conversa da treta, o que significa que assuntos sérios e interessantes ficam pelo meio de tretas.......
Para organizar as coisas melhor, achei bem criar um tópico apenas para noticias sobre ciência.
Cá fica a primeira, uma nova descoberta do LHC: a confirmação da existência de duas novas partículas.
Graças ao LHC e á Philae, estamos a viver em tempos muito interessantes na perspectiva cientifica.
http://Scientists at the Large Hadron Collider discover two new supermassive particles
Clearly, we still have a lot more to learn about the universe: The Large Hadron Collider, famed for its discovery of the Higgs boson, has discovered two new subatomic particles. Known as Xi_b’-and Xi_b*-, the two particles had previously been predicted to exist by the formidable hypothesizing powers of particle physicists, and now they have been observed and confirmed by CERN’s LHCb team. These new particles have six times the mass of the (already very heavy) proton, and according to CERN this discovery could point us towards “new physics beyond the Standard Model,” which would be rather exciting indeed.First, let’s talk about those amazing names: Xi_b’- and Xi_b*-. The first is pronounced ZAI-bee-minus, the second is ZAI-bee-star-minus. I’m actually not sure how you pronounce the inverted comma in the first particle (if you’re a particle physicist, please let me know in the comments). As their names imply, both particles are almost identical — they each consist of a down quark, a strange quark, and a beauty/bottom quark — but the spins of the down and strange quarks are slightly different, resulting in slightly different masses (5.935 GeV vs. 5.955 GeV).
http://www.extremetech.com/wp-content/uploads/2014/04/lhc7-640x391.jpg (http://www.extremetech.com/wp-content/uploads/2014/04/lhc7.jpg)Part of the LHCb detector. (The image at the top is a close-up of LHCb.)
These two new particles join the rather long list of observed Xi baryons, the even longer list of baryons (which contains any particle made up of any three quarks), and thus the huge family of hadrons (which also includes mesons, another family of subatomic particles that contain one quark and one antiquark). While there are only 17 known fundamental particles in the Standard Model (the beauty quark, the Higgs boson, the electron, etc.) these particles are predicted to combine into hundreds of other composite particles. By smashing atoms together with particle accelerators (like the LHC), we have managed to glimpse many of these composite particles, usually as they quickly decay into fundamental particles — but many more are still to be officially discovered.
Read: We already have a perfect, planet-sized dark matter detector: The constellation of GPS satellites (http://www.extremetech.com/extreme/194506-the-perfect-planet-sized-dark-matter-detector-is-already-in-orbit-gps-satellites)
http://www.extremetech.com/wp-content/uploads/2014/04/LHC_Fig1-640x484.jpg (http://www.extremetech.com/wp-content/uploads/2014/04/LHC_Fig1.jpg)The 17-mile-long LHC, showing the location of the four main detectors
In this case, the two new Xi baryons were discovered by the LHCb experiment, one of the LHC’s seven hyper-sensitive particle detectors. As the name implies, LHCb is specially tuned to detect hadrons that contain a bottom quark (some scientists tried to popularize “beauty” when the particle was first discovered, but “bottom” is predominantly used nowadays). The ATLAS and CMS detectors were behind the discovery of the Higgs boson (http://www.extremetech.com/extreme/135756-cerns-higgs-boson-discovery-passes-peer-review-becomes-actual-science), but there’s also ALICE, LHCf, TOTEM, and MoEDAL. Earlier this year, the LHCb also discovered a new type of matter — exotic hadrons (http://www.extremetech.com/extreme/180177-large-hadron-collider-discovers-a-new-type-of-matter-exotic-hadrons) — with, highly unusually, appear to be made of four quarks instead of three.
As for the significance of LHCb’s discovery of Xi_b’- and Xi_b*-, or exotic hadrons for that matter, the particle physicist jury is still out. For the most part, most of these experiments seem to be about confirming hypotheses that have been predicted by the Standard Model — hypotheses that are in some cases decades old. Speaking about the discovery (http://home.web.cern.ch/about/updates/2014/11/lhcb-observes-two-new-baryon-particles), the LHCb’s Patrick Koppenburg said, “If we want to find new physics beyond the Standard Model, we need first to have a sharp picture. Such high precision studies will help us to differentiate between Standard Model effects and anything new or unexpected in the future.” Not exactly the most heavy-hitting remarks for the discovery of new particles, but it gives you some idea of just how far down the rabbit hole our physicists are — they’re focused so tightly that the bigger picture is a blur.
Boa Thread!!
Deixo um canal muito bom que sigo no Youtube.
https://www.youtube.com/watch?v=c3fJRRCAIdk
Jorge-Vieira
20-11-14, 12:23
Já coloquei hoje no topico da conversa da treta, mas fica aqui novamente.
Na proxima segunda-feira ás 21H de PT, passa no Discovery Channel um documentario sobre a sonda que aterrou no cometa.
Imperdivel para quem gosta destes assuntos e ver toda tecnologia e ciencia colocada num projecto daquela dimensão.
Boa Thread!!
Deixo um canal muito bom que sigo no Youtube.
Boa partilha, ainda não conhecia esse canal, mas agora já está nas minhas subscrições.
Deixo aqui alguns canais que costumo seguir, sobre ciência.
Veritasium: https://www.youtube.com/channel/UCHnyfMqiRRG1u-2MsSQLbXA
ASAP Science: https://www.youtube.com/channel/UCC552Sd-3nyi_tk2BudLUzA
Big Think: https://www.youtube.com/channel/UCvQECJukTDE2i6aCoMnS-Vg
VSauce: https://www.youtube.com/channel/UC6nSFpj9HTCZ5t-N3Rm3-HA
Crash Course: https://www.youtube.com/channel/UCX6b17PVsYBQ0ip5gyeme-Q
Sci Show: https://www.youtube.com/channel/UCZYTClx2T1of7BRZ86-8fow
Sci Show Space: https://www.youtube.com/channel/UCrMePiHCWG4Vwqv3t7W9EFg
Jorge-Vieira
20-11-14, 17:21
SanDisk Fusion ioMemory SSDs used in CERN supercomputing projects
Supercomputing 2014: The quest to understand the building blocks of the universe requires intense computing power, which in turn requires some of the fastest storage solutions available. CERN's Large Hadron Collider, which discovered the Higgs boson in 2012, will begin colliding elements with the most energy ever achieved in a particle accelerator in 2015. This requires transmitting 170 petabytes datasets to far-flung research centers around the world. The University of Michigan and University of Victoria are utilizing SanDisk's Fusion ioMemory solutions to handle the influx of data at their multi-site supercomputing project.
http://imagescdn.tweaktown.com/news/4/1/41280_01_sandisk_fusion_iomemory_ssds_used_in_late st_supercomputing_projects.png (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41280_01_sandisk_fusion_iomemory_ssds_used_in_late st_supercomputing_projects_full.png)
The universities need to create a data transfer architecture with the capability to transfer figures across 100 computing centers at 100Gb/s speeds. This isn't typically a huge problem if there is a distributed architecture, but this particular deployment needs to provide that capability from a single server. SanDisk Fusion ioMemory products are stepping in to fulfil the extreme performance requirements, and they are demonstrating a data transfer from the University of Victoria campus to the WAN in the University of Michigan booth (#3569) at the Supercomputing 2014 conference.
Noticia completa:
http://www.tweaktown.com/news/41280/sandisk-fusion-iomemory-ssds-used-in-cern-supercomputing-projects/index.html
SSDs para ajudar no campo da investigação atomica e da particula que gerou o Universo.
Boa partilha, ainda não conhecia esse canal, mas agora já está nas minhas subscrições.
Deixo aqui alguns canais que costumo seguir, sobre ciência.
Veritasium: https://www.youtube.com/channel/UCHnyfMqiRRG1u-2MsSQLbXA
ASAP Science: https://www.youtube.com/channel/UCC552Sd-3nyi_tk2BudLUzA
Big Think: https://www.youtube.com/channel/UCvQECJukTDE2i6aCoMnS-Vg
VSauce: https://www.youtube.com/channel/UC6nSFpj9HTCZ5t-N3Rm3-HA
Crash Course: https://www.youtube.com/channel/UCX6b17PVsYBQ0ip5gyeme-Q
Sci Show: https://www.youtube.com/channel/UCZYTClx2T1of7BRZ86-8fow
Sci Show Space: https://www.youtube.com/channel/UCrMePiHCWG4Vwqv3t7W9EFg
Obrigado Horus,logo já vou dar uma vista de olhos!
Boa Thread!!
Deixo um canal muito bom que sigo no Youtube.
https://www.youtube.com/watch?v=c3fJRRCAIdk
Ficam os outros do Brady também:
- Física: https://www.youtube.com/user/sixtysymbols
- Números: https://www.youtube.com/user/numberphile
- Informática: https://www.youtube.com/user/Computerphile
outros:
http://www.bradyharan.com/
includindo o meu favorito: - Deep Sky Videos: https://www.youtube.com/channel/UCo-3ThNQmPmQSQL_L6Lx1_w
https://www.youtube.com/watch?v=ZW1NP_Cb0Go&list=UUo-3ThNQmPmQSQL_L6Lx1_w
https://www.youtube.com/watch?v=fig8WFALU_k&list=UUo-3ThNQmPmQSQL_L6Lx1_w
https://www.youtube.com/watch?v=x-eL_bobOKA
Jorge-Vieira
21-11-14, 06:44
Som da aterragem da sonda Philae no cometa.
The Sound Of The First Comet Landing
Link para ouvir a gravação:
http://www.hardocp.com/news/2014/11/20/sound_first_comet_landing#.VG7fQaip3MJ
Estava à espera de ouvir um alien a gritar de medo. :D
Jorge-Vieira
21-11-14, 11:37
Ainda gostava de saber como aquela gravação foi feita, sabendo que não existe atmosfera para propagar o som.
Jorge-Vieira
21-11-14, 11:41
Não deve ser ar, deve ser algum gás inerte.
O ar a baixas temperaturas congela, devido à molecula da água.
Não deve ser ar, deve ser algum gás inerte.
O ar a baixas temperaturas congela, devido à molecula da água.
As condições na Exosfera devem ser outras.
O que eles fazem quando mostram estes sons do Espaço é pegar a gama de frequências electromagnéticas captadas e converter para o espectro da audição humana.
É o mesmo que as imagens das galáxias que vemos por aí. Olhando para lá com os nossos olhos, não se vêm aquelas cores todas tão bonitas e detalhadas. O que eles fazem é captar uma série de fotos com diferentes filtros e em diferentes espectros (incluindo infravermelhos e ultravioleta) detectando melhor os detalhes e que tipo de elementos existem. E depois para fazer uma imagem completa para o público, sobrepõem-nas, e artificalmente usam as cores humanamente visíveis para realçar melhor os diferentes elementos abundantes por lá (Hidrogénio, Oxigénio, ...) para que tenhamos uma melhor percepção do que existe lá.
Para ter uma ideia,
espectro electromagnético (Frequências):
http://fundamental.art.pl/WORKSHOP_ERS/Electromagnetic-Spectrum-BLACK.png
https://www.youtube.com/watch?v=MMZ2cyNxPwg
Um bom video para entender o que é a overboard da Hendo, que está em kickstarter.
Total scam.. Então e a tecnologia Maglev que já existe há anos?
Estão a falar de uma hoverboard para puro marketing
Viste o video e os motivos pelo qual ele considera aquilo burla?
Vi. O kickstart não se cinge às hoverboards, querem ir além.
Realmente não viste o video...
Jorge-Vieira
24-11-14, 20:43
Pessoal, daqui a 15 minutos no Discovery Channel vai dar o documentário sobre a sonda que aterrou no cometa.
Já podemos explorar o espaço à vontade. Finalmente podemos tirar bons cafés sem gravidade :D
The first zero-g real coffee machine arrives at the Space Station (thanks to the Italians, of course) (http://www.extremetech.com/extreme/194869-the-first-zero-g-real-coffee-machine-arrives-at-the-space-station-thanks-to-the-italians-of-course)
Yesterday morning, Italy’s first female astronaut arrived at the International Space Station, carrying — well, more accurately, clutching in her arms like a first-born child — the first zero-g Certified Italian Espresso coffee machine. The machine, called the ISSpresso, was created by a couple of Italian companies after another Italian astronaut returned from the space station in 2012 and complained about the lack of good coffee while in Earth orbit. This might just seem like a very costly first-world frivolity at the expense of real science, but the introduction of a coffee machine to the ISS isn’t just for fun: The good times that will be enjoyed over a hot plastic pouch of perk are expected to go a long way towards reducing the extreme isolation and stress that astronauts experience aboard the ISS.The ISSpresso was developed by Lavazza and Argotec — both based out of Turin, Italy, with the former being one of the top coffee machine companies in Europe. The machine, which weighs in at a bulky 20 kilograms (44 lbs), was delivered by the three Expedition 42/43 astronauts — including Samantha Cristoforetti, Italy’s first female astronaut.
http://www.extremetech.com/wp-content/uploads/2014/11/isspresso-diagram-640x426.jpg (http://www.extremetech.com/wp-content/uploads/2014/11/isspresso-diagram.jpg)How the ISSpresso coffee machine works
While creating espresso is fairly simple here on Earth, forcing high-pressure water through coffee grounds is a complex and dangerous task when you’re 300 miles above Earth, with no gravity assistance and only a few millimeters of easily-punctured aluminium protecting you from the infinite harshness of space.
The ISSpresso, then, is not like your Starbucks espresso machine. The astronaut starts by filling a pouch of water from the ISS’s water reserve and connecting it to the ISSpresso’s input valve. The water is then aspirated, pressurized (to 9 bar), and heated to 94 degrees Celsius (201F) — optimal espresso-making temperature. The water is then shot down a pipe that can withstand up to 400 bar, through a Keurig-like capsule of coffee grounds, and into another pouch. The astronaut then (carefully) drinks the coffee through a straw. According to Lavazza, the end result is a “certified” pouch of Italian espresso, and tastes pretty good — though I suspect the lack of aroma (it’s a sealed system) probably detracts from the experience (and taste) somewhat.
http://www.extremetech.com/wp-content/uploads/2014/11/isspresso-pouch-640x426.jpg (http://www.extremetech.com/wp-content/uploads/2014/11/isspresso-pouch.jpg)ISSpresso, squirting espresso into a pouch
Due to the lack of gravity on board the space station, the ISSpresso can’t yet produce a latte or flat white. On Earth, gravity is used to separate the steamed foam from the liquid milk — up in space, they’d have to use a centrifuge, which might be taking things just a little too far. (Plus, without gravity, would the milk even float on the coffee anyway?)
The ISSpresso machine will be the centerpiece of the space station’s new “corner cafe,” which will be a place for Expedition astronauts to kick back, unwind, and reflect over a pouch of coffee. Astronauts usually spend about six months on the ISS, which can be quite isolating when you absolutely cannot return to Earth to see your friends and family until the end of the mission. Living in odd conditions and carrying out space walks can obviously be rather stressful, too.
The first interplanetary coffee machine joins the first zero-g 3D printer (http://www.extremetech.com/extreme/190629-spacex-rocket-launches-to-the-space-station-carrying-the-first-ever-zero-g-3d-printer), which was carried to the International Space Station back in September. Like the ISSpresso, the 3D printer serves a scientific purpose: Being able to build stuff in space, rather than brute-force launching everything from within Earth’s gravitational grip, would make deep-space exploration and eventual colonization a much more realistic prospect. Obviously, if there’s a decent cup of coffee waiting on the surface of Mars, humanity’s first interplanetary colonists might be a little more willing to leave home.
Jorge-Vieira
26-11-14, 10:55
Amanhã já sei onde vou tomar café, a que horas é a nave lá para cima :D
Could Life Be Older Than Earth?
https://www.youtube.com/watch?v=SemEzeYLdmQ
Jorge-Vieira
26-11-14, 13:58
NASA has successfully 3D printed the first object on the ISS
NASA is doing some cool things on-board the International Space Station, with the US space agency taking up a 3D printer and printing out some cool faceplate.
https://www.youtube.com/watch?v=6BAy2fiBElU
The experiment has revealed to NASA that parts stick to the print tray much more in space and its microgravity, than they do on Earth. It's possible that plastic layers bond differently in zero-gravity, than they do here on Earth. More 3D-printed objects will be printed, but they won't be coming back down to Earth until next year.
http://imagescdn.tweaktown.com/news/4/1/41451_01_nasa_has_successfully_3d_printed_the_firs t_object_on_the_iss.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41451_01_nasa_has_successfully_3d_printed_the_firs t_object_on_the_iss_full.jpg)
Link:
http://www.tweaktown.com/news/41451/nasa-has-successfully-3d-printed-the-first-object-on-the-iss/index.html
A capacidade de fazer certos elementos no espaço, sem terem de vir à terra busca-los deve facilitar a vida na ISS.
E a possibilidade de termos formas diferentes no comportamento de certos materiais com pouca gravidade, pode significar novas formas de produção que beneficiam todos.
Jorge-Vieira
26-11-14, 14:28
Sim, esta tecnologia é muito util, porque eles no espaço têm sempre uma maquina que lhes pode fazer alguma coisa sem que necessitem sem se deslocar á terra ou enviar uma missão espacial lá para lhes fornecer a peça.
Não tenho duvidas que mesmo aqui na Terra esta tecnologia vai ter muitas utilizações mesmo a longa distancia, entre uma empresa e uma filial por exemplo ou até na medicina.
Esta experiência caseira está muito fixe.
https://www.youtube.com/watch?v=MBZ-oklH7VI
Jorge-Vieira
26-11-14, 20:42
Está fixe a experiencia, mas já conhecia esse efeito sobre os liquidos.
Mas a questão é o que causa esse efeito.
Jorge-Vieira
27-11-14, 10:49
Quando o liquido é água e se aproxima algo com electricidade estatica, como um copo de plastico, o efeito tem a ver com o electro magnetismo, uma das forças fundamentais das leis do Universo.
Existe atração entre particulas quando colocadas em exposição a cargas electricas diferentes, daí a atração.
Se não for isto, alguém que me explique melhor.
Mas no teste feito pelo Thunderfoot, ele isolou a corrente de água, tornando-a neutra. Logo uma carga eléctrica não teria efeito sobre a água.
Jorge-Vieira
27-11-14, 11:12
Talvez a eletrização por indução explique isso, dado que esse fenomeno se dá com um dos materiais isolados ou até os dois.
Se não for, não faço ideia.
Ora vê isto:
https://www.youtube.com/watch?v=3Ev_k__U3Io&list=UUmb8hO2ilV9vRa8cilis88A
Jorge-Vieira
27-11-14, 11:28
Visto, tudo se resume a cargas electricas, atração, repulsão e electrões que passam de um lado par o outro causando aqueles efeitos.
É a explicacão generalizada que tira das explicações dadas.
Mas se tens elementos isolados e neutros, como consegues ter acções de repulsão ou atracção eléctrica?
Realmente não viste o video...
Não consigo perceber ao que te referes, se calhar dava uma resposta mais concreta..
Jorge-Vieira
27-11-14, 11:51
Qualquer objecto neutro é composto por particluas e atmos, os atmos têm electrões que circulam o nucleo, logo exitem cargas electricas que estão em equilibrio.
Tens de provocar um desiquilibrio entre cargas electricas para originar os fenomenos e isso da-se quando os electroes passam de orbita ou passam para outra particula.
Qualquer material que temos e até o vazio do espaço é composto por materia atomica, logo existem fenomenos electricos associados a essas particulas.
Mas para teres indução precisas de ter movimento de cargas eléctricas.
Jorge-Vieira
27-11-14, 13:28
Nao consegues parar um electrão, este está sempre em movimento, nem se consegue determinar a sua posiçâo numa determinada orbita à volta do nucleo, isto é explicado pelo principio da incerteza de Heisenberg.
Mas uma coisa o o electrão estar em volta de um núcleo, outra coisa é ele sair.
Para criar electricidade/magnetismo tens de ter electrões a saltar entre os átomos.
Jorge-Vieira
27-11-14, 13:31
Os electroes so saem das orbitas quando existem mudanças de estado e isso pode acontecer de uns atomos para outros como dentro do proprio atomo.
Mas para criar uma corrente eléctrica precisas de uma força externa, como um diferencial de voltagem entre dois pontos.
Electricidade e magnetismo são a mesma coisa. Se tens a água num estado eléctrico neutro, como é que esta pode agir sobre um efeito de electricidade/magnetismo.
Jorge-Vieira
27-11-14, 13:46
Talvez pelos movimentos das particulas ou atmos que contituem as moleculas da água, se não for isso, não faço ideia do que possa ser.
https://www.youtube.com/watch?v=xyeYrqkWv7I
Jorge-Vieira
28-11-14, 14:54
Interessante esse video.
Jorge-Vieira
28-11-14, 15:09
Japão quer “invadir” um asteroide e a missão começa já este mês
A sonda Rosetta e a sua parente Philae fizeram história, mas os japoneses querem escrever a sua própria página com a missão Hayabusa 2. Além de colocar uma sonda e um robot num cometa, serão lançados ainda vários “ataques” para a recolha de minerais. O mundo científico vive ainda na incerteza sobre o atual estado da missão Rosetta/Philae (http://tek.sapo.pt/extras/sugestoes/sugestao_tek_rosetta_e_philae_e_a_historia_de_1421 923.html), depois de a aterragem do módulo no cometa 67P não ter corrido como inicialmente previsto (http://tek.sapo.pt/noticias/computadores/sonda_philae_aterrou_tres_vezes_no_cometa_67p_1421 555.html) – o que se traduz numa menor receção de energia e no menor envio de dados. Mas os japoneses vão avançar com seu próprio plano de exploração espacial.
No dia 30 de novembro vai ser iniciada a missão Hayabusa 2, na qual a agência espacial do Japão (JAXA) vai também enviar uma sonda para perseguir um asteroide. Mas os contornos da missão são um pouco diferentes daquela que a ESA operou.
Em primeiro lugar a viagem será muito mais curta, estando prevista a chegada ao astro 1999 JU3 em 2018. Depois os modelos da missão per se também serão diferentes.
Enquanto a Rosetta fez descer a sonda Philae, a Hayabusa 2 vai lançar uma sonda, a MASCOT, e um veículo, MINERVA 2, sobre o asteroide. A sonda fará a sua pesquisa autónoma, ao passo que o veículo terá como missão encontrar o melhor local onde a Hayabusa 2 pode fazer as suas recolhas.
Isto porque o satélite maior vai fazer várias aproximações ao cometa para a recolha de minerais: o 1999 JU3 é composto maioritariamente por argila e pedra, elementos que podem ser propícios a conter matéria orgânica ou água.
Mas o grande final está reservado para mais tarde, 18 meses após a chegada ao asteroide. Aí a Hayabusa 2 vai lançar um dispositivo sobre o asteroide que vai abrir uma cratera no mesmo, na qual a sonda principal da missão vai fazer a recolha de material do subsolo, explica o The Wall Street Journal (http://blogs.wsj.com/digits/2014/11/26/asteroid-explorer-hayabusa2-set-for-launch-on-sunday/).
Noticia completa:
http://tek.sapo.pt/multimedia/japao_quer_invadir_um_asteroide_e_a_missao_co_1423 088.html
A Philae fez muita coisa, mas esta hayabusa tem objectivos muito altos.
Se os conseguir concretizar vai trazer muita informação preciosa sobre o nosso sistema solar e arredores.
Jorge-Vieira
28-11-14, 15:33
A Philae foi um inicio, desde que eles aqui há uns anos atrás foram recolher poeiras a um cometa, já era de esperar que esta missões viessem a acontecer.
A Philae sendo a pioneira, já se sabe que as proximas vão tentar melhorar bastante aquilo que já foi foito, mesmo até o nível de tecnologia é superior dado que a Philae tem pelo menos uns 10 anos de atraso em tecnologia.
Bastante mais simples e rápida essa expedição, já que o 1999 JU3 é um asteróide com uma trajectória que não vai além da de Marte.
http://2.bp.blogspot.com/_fY3oUXz94pc/TGK20ucrdyI/AAAAAAAAATg/IkPWJFRsMXQ/s1600/(162173)+1999+JU3-08112010.gif
Já o cometa 67P tem uma trajectória que ultrapassa a de Jupiter, passando pela cintura de asteróides para lá chegar. Só a distância entre Marte e Júpiter é o dobro da de Marte até ao Sol, contendo a cintura de asteróides interior entre eles.
E a Rosetta para chegar ao cometa 67P teve vários impulsos gravitacionais para ser projectada a uma velocidade e distância para apanhar depois o cometa na sua aproximação de volta. Pelo caminho fez ainda "visitas" a dois asteroides antes do impulso final. É obra...
https://www.youtube.com/watch?v=ktrtvCvZb28
California flips the switch on the world's largest solar power farm (http://www.techspot.com/news/59006-california-flips-switch-world-largest-solar-power-farm.html)
The first 500-plus megawatt solar power plant is now up and running in the US. Topaz, as it’s being called, is located in San Luis Obispo County on California’s Carrizo Plain and is the result of two years of hard work. Oh, and it also happens to be the largest solar power farm in the world according to a report from Greentech Media (https://www.greentechmedia.com/articles/read/550-megawatts-AC-to-be-exact).The photos really don’t do the solar farm justice. The $2.5 billion project was manufactured by First Solar (http://firstsolar.com/) and consists of nine million solar panels arranged over a massive 9.5 square miles. The farm wasn’t supposed to be ready until sometime early next year but is now online.
http://static.techspot.com/images2/news/bigimage/2014-11-28-image-4.jpg
Topaz is capable of generating 550 megawatts which is enough to supply power to 160,000 homes and eliminate 377,000 tons of CO2 each year. The publication was quick to point out that it was built on "disturbed" farm land miles away from sensitive areas like the Carrizo Plain National Monument.
The farm will only retain the title of world’s largest for a short time, however. Next year, the Solar Star (http://inhabitat.com/massive-579mw-solar-star-power-plant-goes-online-in-california/) plant is expected to go online that’ll be capable of turning out 579 megawatts.
While impressive, one has to wonder whether or not the panels will be able to maximize their efficiency. Earlier this week, researchers revealed they’d come up with a way to improve solar panel efficiency by up to 20 percent simply by using the quasi-random patterns etched into Blu-ray discs (http://www.techspot.com/news/58975-blu-ray-discs-can-improve-solar-panel-efficiency.html).
O problema dos campos de paineis solares é só um. Tornam o solo onde estão em algo completamente inutilizável para mais nada, pois fica completamente árido. Há sempre o outro lado da moeda. Entre poluir com petróleo e derivados ou inutilizar grandes porçoes do planeta para se ter energia limpa... qual o melhor? Não sei muito sinceramente...
Jorge-Vieira
28-11-14, 22:28
California flips the switch on the world's largest solar power farm (http://www.techspot.com/news/59006-california-flips-switch-world-largest-solar-power-farm.html)
Excelente para aproveitar uma fonte de energia inesgostável como o Sol.
Excelente para aproveitar uma fonte de energia inesgotável como o Sol.
Energia nuclear FTW!
Jorge-Vieira
28-11-14, 22:41
Energia nuclear FTW!
Pelos menos mais uns largos milhões de anos, só de pensar a quantidade de energia que o Sol produz num minuto dava para alimentar todo o nosso planeta uns anos valentes seguidos, dá que pensar porque não aproveitamos ainda mais aquela energia.
O problema dos campos de paineis solares é só um. Tornam o solo onde estão em algo completamente inutilizável para mais nada, pois fica completamente árido. Há sempre o outro lado da moeda. Entre poluir com petróleo e derivados ou inutilizar grandes porçoes do planeta para se ter energia limpa... qual o melhor? Não sei muito sinceramente...
Sem dúvida...porque os desertos(...) servem para cultivo.
Energia nuclear FTW!
Exacto.
Não fosse a ignorância sobre a radiação fomentada pela guerra fria, era e devia ser usada em muito maior escala.
Pelos menos mais uns largos milhões de anos, só de pensar a quantidade de energia que o Sol produz num minuto dava para alimentar todo o nosso planeta uns anos valentes seguidos, dá que pensar porque não aproveitamos ainda mais aquela energia.
O problema é que os painéis solares que temos ainda são relativamente ineficientes.
Se toda a energia solar que atinge cada painel solar fosse transformada em energia eléctrica o valor de produção desta central seria várias vezes maior.
É necessário apostar muito mais em criar painéis solares mais eficientes.
Não fosse a ignorância sobre a radiação fomentada pela guerra fria, era e devia ser usada em muito maior escala.
Por acaso estava a dizer energia nuclear, pois o sol é uma central nuclear.
Antes que digam, eu sei que é fusão nuclear e não cisão nuclear, como a que temos nas nossas centrais cá na terra.
Mas concordo que a energia nuclear de fisão, podia ser melhor aproveitada caso não fosse o medo e mitos que rodeiam este tipo de produção de energia.
Ignorancia sobre a radiação, devia ser usada em muito maior escala? Gostas de andar a brincar com brinquedos perigosos? Já basta ter-mos uma bomba relógio aqui ao pé em Espanha que nos contaminará a todos assim que rebentar, aliás já passou a validade e Espanha nega-se a fechar aquilo, estão mesmo a pedi-las mas quem se vai lixar mais somos nós, que está mesmo ao pé da nossa fronteira.
Olha pergunta aos japoneses se devia ser muito mais utilizada a energia nuclear, que eles dizem-te.
E sim, já viste o que é utilizares largas porções de terreno no alentejo que podiam ser para agricultura, a serem utilizados para energia solar? Pois, é que as pessoas comem da agricultura e Portugal particularmente, já depende que chegue do estrangeiro nisso.
Jorge-Vieira
28-11-14, 22:59
O problema é que os painéis solares que temos ainda são relativamente ineficientes.
Se toda a energia solar que atinge cada painel solar fosse transformada em energia eléctrica o valor de produção desta central seria várias vezes maior.
É necessário apostar muito mais em criar painéis solares mais eficientes.
Sim, como é logico.
Da mesma forma que também é impossivel aproveitar toda a energia do Sol que atinge a Terra porque alguma perde-se no espaço e outra é refletida pela atmosfera.
Quando falei na energia que o Sol produz, estava a referir-me à quantidade total que é gerada no nucleo do Sol e que se houvesse uma forma de captar toda essa energia nem que fosse por um dois minutos, tinhamos energia gratuita na Terra umas largas centenas de anos.
Infelizmente a tecnologia que existe ainda não permite recriar as condições do Sol aqui na Terra.
Ignorancia sobre a radiação, devia ser usada em muito maior escala? Gostas de andar a brincar com brinquedos perigosos? Já basta ter-mos uma bomba relógio aqui ao pé em Espanha que nos contaminará a todos assim que rebentar, aliás já passou a validade e Espanha nega-se a fechar aquilo, estão mesmo a pedi-las mas quem se vai lixar mais somos nós, que está mesmo ao pé da nossa fronteira.
Olha pergunta aos japoneses se devia ser muito mais utilizada a energia nuclear, que eles dizem-te.
E sim, já viste o que é utilizares largas porções de terreno no alentejo que podiam ser para agricultura, a serem utilizados para energia solar? Pois, é que as pessoas comem da agricultura e Portugal particularmente, já depende que chegue do estrangeiro nisso.
Brinquedos perigosos?
Tens que te educar.
Sabes quantas pessoas morreram em Chernobyl como resultado directo e indirecto do maior desastre de sempre relacionado com energia nuclear?
50...
Japão...0.
O pânico do desconhecido é muito fácil de alastrar.
Recomendo a leitura:
http://www.filemail.com/d/vblicshzoyemfiv
Está em Inglês e tem 230 páginas.
Eu já não estava a falar da quantidade de energia perdida na atmosfera e espaço, apenas da energia transformada em eléctrica.
Dependendo do tipo de painel a eficiência varia entre 10 a 20%.
Nós já conseguimos recriar o processo de fusão cá na terra. O problema é que para iniciar e manter o processo ainda é preciso mais energia do que aquela que depois é produzida.
Mas temos feito grandes avanços em termos de produção de energia por fusão a frio, especialmente na Europa. Pode ser que daqui a umas décadas tenhamos tal tecnologia funcional.
O pânico do desconhecido é muito fácil de alastrar.
Acredita que ainda há muita gente que julga que uma central nuclear pode rebentar como uma bomba atómica.
Estamos a falar de gente que não sabe a diferença entre U235 e U238.
O que? Quantas pessoas morreram? E quantas nasceram deficientes? Sabes os efeitos que a radiação tem em tudo o que é ser vivo? Estás bem Martins?
Queres ter filhos, netos, bisnetos, etc a nascerem deficientes por causa de uma brincadeira cara? Eu não! Terrenos contaminados por radiação ficam completamente inutilizáveis, nem para viver nem para plantar o que for.
A melhor energia de todas parece-me ser a das ondas e a do vento. Seguidas da solar. Depois vem o carvão, etc.
O que? Quantas pessoas morreram? E quantas nasceram deficientes? Sabes os efeitos que a radiação tem em tudo o que é ser vivo? Estás bem Martins?
Queres ter filhos, netos, bisnetos, etc a nascerem deficientes por causa de uma brincadeira cara? Eu não! Terrenos contaminados por radiação ficam completamente inutilizáveis, nem para viver nem para plantar o que for.
A melhor energia de todas parece-me ser a das ondas e a do vento. Seguidas da solar. Depois vem o carvão, etc.
Que lavagem cerebral...
Perde umas horas da tua vida e lê o livro que postei, pode ser que aprendas alguma coisa com um dos maiores especialistas sobre radiação que alguma vez pisou a terra.
Jorge-Vieira
28-11-14, 23:12
Eu já não estava a falar da quantidade de energia perdida na atmosfera e espaço, apenas da energia transformada em eléctrica.
Dependendo do tipo de painel a eficiência varia entre 10 a 20%.
Nós já conseguimos recriar o processo de fusão cá na terra. O problema é que para iniciar e manter o processo ainda é preciso mais energia do que aquela que depois é produzida.
Mas temos feito grandes avanços em termos de produção de energia por fusão a frio, especialmente na Europa. Pode ser que daqui a umas décadas tenhamos tal tecnologia funcional.
Acredita que ainda há muita gente que julga que uma central nuclear pode rebentar como uma bomba atómica.
Estamos a falar de gente que não sabe a diferença entre U235 e U238.
Sim, é verdade.
Ainda há pouco tempo deu no Discovery Channel um documentario sobre o Sol e falou nesse processo de recriar a fusão nuclear aqui na Terra e as quantidades de energia eram astronomicas para conseguir manter face à produção.
Jorge-Vieira
28-11-14, 23:13
Que lavagem cerebral...
Perde umas horas da tua vida e lê o livro que postei, pode ser que aprendas alguma coisa com um dos maiores especialistas sobre radiação que alguma vez pisou a terra.
Ainda perdes o teu tempo...
O LHC ainda não conseguiu arranjar respostas relativas à produção de energia?
Jorge-Vieira
28-11-14, 23:53
Já se chegou a falar em anti materia, mas isso também ainda é um pouco de ficção e é necessario quantidades astronomicas de energia para produzir antimateria, existindo tambem o inconveniente de nao ser uma particula estavel e se tocar em materia a mesma desaparece.
A quantidade de energia que a anti materia produz é ainda maior que a da fissão nuclear.
O LHC vai muito mais longe do que produção de energia. É sobre encontrar novas partículas sub atómicas, que até recentemente eram apenas hipóteses.
É sobre encontrar o que causa a massa e a energia da matéria.
Os dados que vêm do LHC ainda vão demorar a ser processados em conhecimento. Depois ainda vão ser muitos anos até termos uma aplicação prática para eles.
Mas a nação, ou grupo de nações que hoje tem um avanço sobre esta ciência serão as nações que daqui a um século vão dominar em termos tecnológicos e como tal, militares, económicos, etc.
Jorge-Vieira
29-11-14, 00:01
Uma dessas particulas que é procurada é a a particulabde Deus ou bosão de Higgs, a particula que eles dizem ser a originaria do Universo.
Segundo a Lockheed Martin o seu gerador dynomak fusion está quase pronto para produzir energia de forma rentável.
The new dynomak fusion reactor design could make fusion power cheaper than coal (http://www.extremetech.com/extreme/185649-the-new-dynomak-fusion-reactor-design-could-make-fusion-power-cheaper-than-coal)
Fusion is back in the news, and not just because Lockheed is claiming to have solved (http://www.extremetech.com/extreme/192126-lockheed-says-itll-make-a-truck-sized-fusion-reactor-within-10-years) the world’s every problem with magical million-dollar truck-sized generators. Historically, fusion research was all about possible strategies and mechanisms that might one day allow for controlled fusion; today, researchers are now at the point that they know specifically which breakthroughs must occur to make the technology viable — and, as always occurs in such situations these days, the upgrades have been coming in quickly. Several large, well-funded teams are competing to be the first to generate one net joule of energy from fusion, but an academic team from the University of Washington may be doing that work that ends up winning. They’ve dreamed up a new fusion power design called a Dynomak, and it could make fusion power stations cost competitive with coal.What does “cost competitive” mean? Well, relative to prior fusion projections, a Dynomak facility could be built for about a tenth the cost of competing fusion reactor designs and produce up to five times as much power. This lets it catch up to the price-per-watt of coal, though only at the gigawatt scale; a 1GW Dynomak reactor might cost $2.7 billion, to a modern average of $2.8 billion for comparable coal plants. It’s all theoretical of course — this team has presented a major improvement to reactor design, but it will be up to larger, better funded research teams to actually make use of it. What’s the big innovation, then?
http://www.extremetech.com/wp-content/uploads/2014/11/dynomak-5-640x359.jpg (http://www.extremetech.com/wp-content/uploads/2014/11/dynomak-5.jpg)The team’s test rig, called HIT-SI3, has only three “helicity injectors.” The final version, HIT-SIX should have, uh, six. Click to zoom in.
There are two (major) schools in fusion tech (http://www.extremetech.com/tag/fusion) right now: magnetic and laser confinement. In both cases you have to shrink down a sample of your fusion fuel — usually a mix of hydrogen and helium — so it get super-pressurized and thus super-heated, beginning the fusion process, and in both cases we need incredibly fine control of our inward pressing force. Whether it’s a complex magnetic field or the combined force of trillions of watts of laser light, getting strong-enough and fine-enough control of confinement is undoubtedly the biggest hurdle facing consumer fusion tech. The University of Washington’s work could make that process far more economical. By wading into the mathematics of magnetic confinement, they may have negated the need for magnets altogether.
Read: 500MW from half a gram of hydrogen: The hunt for fusion power heats up (http://www.extremetech.com/extreme/123837-500mw-from-half-a-gram-of-hydrogen-the-hunt-for-fusion-power-heats-up)
http://www.extremetech.com/wp-content/uploads/2014/11/dynomak-4-283x300.jpg (http://www.extremetech.com/wp-content/uploads/2014/11/dynomak-4.jpg)Here’s a basic cross-section of a spheromak rector. Note: still very complex.
Probably the most widely publicized design for a magnetic fusion generator is based on a tokamak, a huge, donut-shaped magnet. The precisely shaped magnetic field it creates has been proven to be capable of containing a fusion reaction (just not while using less energy than the fusion itself creates). The costs are also prohibitive, as with the test model for ITER’s 30,000 pound super-conducting Slinky (http://www.geek.com/science/iter-takes-delivery-of-30000-pound-magnet-for-nuclear-fusion-1596751/) which recently arrived. Just as we’re finding with MRI machines, super-cooled magnets are a limiting factor for fusion power, and so we then developed another design called a spheromak — a magnetic fusion machine that creates its confining field by running current directly into the sphere of plasma at the power station’s heart.
This is obviously a huge improvement to the tokamak, but as you might imagine, just pumping electricity into a sample undergoing fusion isn’t very precise. Spheromak designs had the theoretical advantage in cost and efficiency, but struggled to show that they could actually work. Then, two years ago, this University of Washington team published an idea called imposed dynamo current drive (hence “Dynomak”), a proposed model for predicting the magnetic field based on the injection of outside magnetic fields. This was hailed at the time as having huge implications for fusion power, and now we’re seeing some hard numbers to that effect. [Research paper: doi:10.1016/j.fusengdes.2014.03.072 (http://dx.doi.org/10.1016/j.fusengdes.2014.03.072)]
http://www.extremetech.com/wp-content/uploads/2014/11/dynomak-31-640x465.jpg (http://www.extremetech.com/wp-content/uploads/2014/11/dynomak-31.jpg)Here’s the tokamak at the JET fusion lab in the UK (http://www.extremetech.com/extreme/181298-the-uk-will-be-the-first-to-break-even-with-fusion-power-leading-us-towards-a-future-of-clean-infinite-energy) – a smaller version of the tokamak that will eventually be installed at ITER
Essentially, the Dynomak is a precisely controlled spheromak reactor that uses imposed dynamo current drive to control the magnetic field it creates. This means we might be able to keep heated hydrogen isotopes in one spot without having to leverage several national economies to do it, or further deplete helium reserves and kill the birthdays of tomorrow (http://www.geek.com/science/geek-answers-why-are-we-running-out-of-helium-1589334/).
That’s great, but this team’s test rig is only about 10% as big as it ought to be and uses only three of the final six “helicity injectors” that make the Dynomak possible. Until a full-scale test run is conducted, this will be just another fusion fairytale. Still, given the incredible cost benefits we’d enjoy if it is correct, this seems like an idea very worth exploring.
Jorge-Vieira
29-11-14, 10:49
Ainda devem faltar uns bons anos até ver isso a funcionar em pleno, mas à partida garante energia mais barata e mais rentavel de produzir.
E ainda melhor, que não enche a atmosfera de CO2 e outros químicos que prejudicam o ambiente e a saúde humana.
E depois não temos os problemas de segurança da extracção de petróleo e carvão, nem os seus problemas ambientais.
Não sou crente no embuste do CO2/aquecimento global, tem muita "agenda" por trás.
Aliás, é mais enfatizado pela media global do que pela maioria dos verdadeiros cientistas (aqueles que não dependem do financiamento dos seus projectos sobre a nomenclatura "global warming"), onde a opinião é consensual...não existe aquecimento global provocado pela acção humana, somos "peaners" comparados com os eventos cósmicos como a variação de intensidade do...sol.
Culpar o Co2 pelo mal causado ao planeta é a mesma coisa que culpar a vida por existir.
Contudo, não fosse o capitalismo matar projectos à nascença já podíamos estar noutro nível de aproveitamento de energias não fósseis.
Acho que andas a confundir as coisas. A maior parte da comunidade cientifica concorda com a teoria do aquecimento global, sendo o CO2 um dos gazes que está a provocar o efeito de estufa.
Apenas os estudos patrocinados pelas grandes petrolíferas é que mostram o contrário.
Já vi teorias para conseguir reverter a decadência da camada de Ozono manipulando o clima.
Acho que andas a confundir as coisas. A maior parte da comunidade cientifica concorda com a teoria do aquecimento global, sendo o CO2 um dos gazes que está a provocar o efeito de estufa.
Apenas os estudos patrocinados pelas grandes petrolíferas é que mostram o contrário.
Errado.
Se quiseres pensar "out of the box", pesquisa um pouco.
Conheço bem essas teorias out-of-the-box, pois também já andei a investigar.
São meros disparates de meia dúzia de cientistas comprados.
Ainda recentemente o IPCC, que representou um relatório exaustivo sobre as alterações climáticas.
http://www.ipcc.ch/report/ar5/wg1/#.UkXTniR56Tt
É ridículo culpar um componente básico de qualquer forma de vida como o principal causador do aquecimento global.
Mas cada um acredita no que quiser, eu não costumo considerar indiscutíveis verdades impostas como universais.
Há muito "ruído" espalhado em torno deste tema, muito lunático a falar do que não sabe, o que pode induzir em considerações de "disparates".
Pesquisa nomes como Ivar Giaever...
Não é culpar um elemento, mas sim vários, que estão a causar o efeito de estufa.
O aumento da quantidade de CO2 está a ser causado pelo ser humano.
Não é culpar um elemento, mas sim vários, que estão a causar o efeito de estufa.
O aumento da quantidade de CO2 está a ser causado pelo ser humano.
Sabes tão bem quanto eu que a "big picture" está centrada em torno do CO2.
O aumento da quantidade de CO2 é causada por qualquer variação de intensidade de qualquer forma de vida e já foi provado que existiram maiores concentrações de CO2 em períodos de arrefecimento global.
Se saíres um pouco do "oficial" vais perceber que há muito boa gente credenciada a defender o oposto e a virar as atenções para o maior criador/potenciador/integrador de vida do nosso universo.
Sim, existem outras fontes que produzem CO2 e os seres humanos nem sequer são os que mais produzem CO2, mas anteriormente tínhamos um equilíbrio, mas com os 30 GTon de CO2 que libertamos todos os anos para a atmosfera comprometemos esse equilíbrio.
Neste momento estamos a registar 400 ppm de CO2 na atmosfera, quando nos últimos 800 mil anos, o valor andava entre os 200 e os 270 ppm.
Como o isótopo de carbono 13 é raro nos combustíveis fosseis e ao actualmente estamos a ver uma redução de Carbono 13 na atmosfera, com uma subida de carbono 12, a conclusão é a de que somos nós que estamos a aumentar a quantidade de CO2.
Estás errado quando afirmas que "existiram maiores concentrações de CO2 em períodos de arrefecimento global". Na realidade o que se verifica é uma variação da temperatura e na concentração de CO2. Sendo que o CO2 aumento e apenas vários anos depois é que vemos a temperatura global a subir. Ou seja, verificamos sempre que um período de aquecimento global foi sempre precedido por um período de aumento de concentração de CO2 na atmosfera.
Normalmente estes períodos de aumento de CO2 na atmosfera eram causados pelo efeito de Milankovitch. Com este efeito, temos um aumento de temperatura ligeiro causado pela posição da terra em relação ao sol, mas que por sua vez reduz a solubilidade dos oceanos em absorver CO2. Como o CO2 não é re-absorvido, aquece mais o planeta, o que reduz mais a solubilidade dos oceanos, aumentando o efeito.
No entanto, o aumento de CO2 que verificamos recentemente não está ligado a um ciclo de Milankovitch.
Jorge-Vieira
30-11-14, 10:15
Graphene ‘Wonder Material’ Can Be Used to Generate Fuel and Electricity Out Of Thin Air
If there is something that a material out there can do, Graphene can probably do it better. From better capacitors to processors, to tensile strength, heck even body armor, Graphene is the ‘wonder material’ of this era. Even with all this historical success, Graphene still managed to raise my eyebrows; because it turns out siphoning fuel out of thin air is just another walk in the park for it.
http://cdn4.wccftech.com/wp-content/uploads/2013/08/0820_graphene_630x420.jpg (http://cdn4.wccftech.com/wp-content/uploads/2013/08/0820_graphene_630x420.jpg)An image of a graphene super capacitor @unkown Graphene based air filters can theoretically pump hydrogen fuel out of air Graphene is unarguably one of the greatest discoveries of the decade, but it was not until 2010 that progress on it really started gaining exponential traction. It all started with the isolation of the first sheet of Graphene, something that won the scientists involved, a nobel prize. This experiment was conducted using pencils and a bunch of tape. And no I am not kidding when I say that you can easily reproduce the experiment in your house by following tutorials available online (although be very careful with the isolated sheet of graphene since, though it is in very minute quantities, it is toxic and highly reactive).
Noticia completa:
http://wccftech.com/graphene-wonder-material-fuel-thin-air/ (http://wccftech.com/graphene-wonder-material-fuel-thin-air/#ixzz3KXsvU4jo)
Jorge-Vieira
30-11-14, 10:23
See Earth Live From Space via Webcam
http://cdn.eteknix.com/wp-content/uploads/2014/11/international-space-station-67774_1280.jpg
Want to view earth from space but haven’t got the time to train as an astronaut? Well now you can, via a webcam on the web.
The ISS High Definition Earth Viewing Experiment allows you to get a view from a windows on-board the International Space Station as it circumnavigates the earth.
The project, which has been viewed by 32 million people since April, aims to give people a 24 hour view of the ISS on its daily orbit around earth. It is also a NASA experiment, which has been designed to test the effect of space on video cameras, with the objective of finding the best way to record video in zero gravity
Link para ver as imagens da webcam:
http://www.eteknix.com/see-earth-live-space-via-webcam/
http://img-9gag-ftw.9cache.com/photo/a1ZVrjR_700b.jpg
Jorge-Vieira
30-11-14, 13:13
:D
Imagem da Europa (Lua) restaurada com recurso às mais recentes técnicas de processamento de imagem. (NASA)
https://www.youtube.com/watch?v=kz9VhCQbPAk
Jorge-Vieira
30-11-14, 21:12
Essa lua ainda tem muitos segredos por contar, essa camada de gelo esconde algo por baixo.
Alias, ali as luas em torno de Jupiter quase todas elas são laboratorios para explorar.
Jorge-Vieira
01-12-14, 06:25
NASA to Launch First Orion Spaceship Test Flight This Week
NASA is preparing to get back into the business of space exploration with the first live test ofLockheed Martin’s Orion capsule (http://www.space.com/27879-orion-space-capsule-test-webcast.html). The capsule will most likely be the craft that will eventually take astronauts into deep space and other planets, namely Mars, and return safely to Earth. The launch is scheduled for Thursday and will be broadcast live on the Internet.During its 4.5-hour trip, Orion will orbit Earth twice and travel to an altitude of 3,600 miles into space," NASA officials said in a statement. "The flight is designed to test many of the elements that pose the greatest risk to astronauts and will provide critical data needed to improve Orion’s design and reduce risks to future mission crews."
Link:
http://www.hardocp.com/news/2014/11/30/nasa_to_launch_first_orion_spaceship_test_flight_t his_week#.VHwKBaip3MJ
Jorge-Vieira
02-12-14, 18:38
Intel Creates New Communication System for Prof. Stephen Hawking (http://www.techpowerup.com/207686/intel-creates-new-communication-system-for-prof-stephen-hawking.html)
Today Intel demonstrated for the first time with Professor Stephen Hawking a new Intel-created communications platform to replace his decades-old system, dramatically improving his ability to communicate with the world. The customizable platform will be available to research and technology communities by January of next year.
By studying the acute needs of Hawking, and the very specific relationship between this man and his machine, Intel has delivered a tailored solution - called ACAT (Assistive Context Aware Toolkit) - that results in improved communication for Hawking with the world. It has the potential to become the backbone of a modern, customizable system other researchers and technologists can use to benefit those who have motor neuron diseases (MND) and quadriplegia. Hawking has an MND related to amyotrophic lateral sclerosis(ALS), a condition that has progressed over the years. He is almost entirely paralyzed and communicates through technology.
http://tpucdn.com/img/14-12-02/13a_thm.jpg (http://www.techpowerup.com/img/14-12-02/13a.jpg)
"Medicine has not been able to cure me, so I rely on technology to help me communicate and live," said Hawking. "Intel has been supporting me for almost 20 years, allowing me to do what I love every day. The development of this system has the potential to improve the lives of disabled people around the world and is leading the way in terms of human interaction and the ability to overcome communication boundaries that once stood in the way."
Increased Speed, Accuracy and Ease of Use
A multidisciplinary team of researchers from Intel Labs has been working for three years with Hawking to replace his current communications system with modern technology. Hawking was instrumental in the design process, providing ongoing feedback, to help Intel improve the system with every iteration.
"Professor Hawking uniquely used technology to master communicating with the world for decades, but his old system could be likened to trying to use today's modern apps and websites with a computer without a keyboard or mouse," said Wen-Hann Wang, Intel vice president and Intel Labs managing director. "Together we've delivered a holistically better communication experience that contributes to his continued independence and can help open the door to increased independence for others."
Similar to the parts of an engine interacting smoothly to run a car, the Intel-created software user interface enables existing and new technologies to efficiently work with each other. The result: Hawking's typing speed is twice as fast, and there is a 10x improvement in common tasks, such as easier, more accurate and faster browsing, editing, managing and navigating the Web, emails and documents; opening a new document; and saving, editing and switching between tasks.
His existing cheek sensor is detected by an infrared switch mounted to his glasses and helps him select a character on the computer. Integrating software from British language technology company SwiftKey* has greatly improved the system's ability to learn from Hawking to predict his next characters and words so he only has to type less than 20 percent of all characters.
This information is sent to his existing speech synthesizer so he can communicate to others through his Lenovo* laptop running Microsoft Windows*. For example, to conduct a Web search, Hawking previously had to take arduous routes, such as exiting from his communication window, navigating a mouse to run the browser, navigating the mouse again to the search bar, and finally typing the search text. The new system automates all of these steps for a seamless and swift process.
Open, Customizable Software
Quadriplegia and MND affect over 3 million people worldwide. MND impacts voluntary muscle activities, like speaking, walking, swallowing and general movement of the body. Progressive in nature, it causes increasing disability and eventually death.
Lama Nachman of Intel Labs joined Hawking onstage in London to outline how their work together can inspire the research community. "Technology for the disabled is often a proving ground for the technology of the future," said Nachman. "From communications to genetic research, technology is beginning to open doors to possibilities that can only be imagined."
The new toolkit created by Intel can be customized and changed to suit different users. The Intel-created system is a modern software interface for researchers and technologists to create customized solutions enabled by touch, eye blinks, eyebrow movements or other user inputs for communication.
With the platform being accessible and free, Intel and Hawking envision that research and technology communities - such as those focused on sensing, text prediction, context awareness and user interface design - will build upon and bring new and improved solutions to market.
Link:
http://www.techpowerup.com/207686/intel-creates-new-communication-system-for-prof-stephen-hawking.html
É bom ver a Intel a ajudar uma das pessoas mais inteligentes e importantes para o desenvolvimento da espécie humana e da sua compreensão do universo.
Jorge-Vieira
02-12-14, 18:44
Sem duvida.
A história do Stephen Hawking (http://www.techpowerup.com/207686/intel-creates-new-communication-system-for-prof-stephen-hawking.html) é notavel e ele estará entre os aqueles que consideramos genios, todas as teoria dele sobre o Universo são simplesmente de alguém que está muito à frente.
Daqui a uns tempos temos o cloak dos klingons :)
https://www.youtube.com/watch?v=kBUwfizZTas
Boas!
Deixo-vos aqui um pequeno filme Sci-Fi, que estive a ver e achei que devia ser partilhado e conhecido por mais gente...
Vejam...
http://vimeo.com/108650530
Sobre...
- http://www.erikwernquist.com/wanderers/film.html
Cumprimentos,
LPC
Jorge-Vieira
03-12-14, 21:17
https://www.youtube.com/watch?v=kaoO5cY1aHk
https://www.youtube.com/watch?v=kaoO5cY1aHk
Boas!
Tecnologia interessante...
Em especial a aplicação como Dashboard 3D no carro...
Tem potencial...
Cumprimentos,
LPC
Jorge-Vieira
04-12-14, 08:49
Scientists Invent Material with Nano Nails That Can Repel All Known Kinds of Liquid
Hydrophobic treatments are somewhat of a niche market to endow on your favorite device or product. Some hydrophobic treatments even exist for cars and windshields that allow people to drive in the rain without the screen actually getting wet – just like magic. However, nearly all of these treatments are limited to water only with permeability to all other forms of liquid but now the good folks over at UCLA have invented a texture that can repel all known forms of liquids. Which is pretty neat, not to mention has a lot of applications.
http://cdn2.wccftech.com/wp-content/uploads/2014/12/nano-nails-super-omniphobic-635x409.jpg (http://cdn2.wccftech.com/wp-content/uploads/2014/12/nano-nails-super-omniphobic.jpg)An electron micrograph of a nail bed on the nano scale @ Credit URL (http://www.designboom.com/wp-content/uploads/2013/03/nanoscale00.jpg). Texture constructed out of nano sized nails can never get wet – by any substance If you like going out on an adventure trip during downpours, hail or snowstorms, you might be familiar with the products such as Rain X or PPG Aquapel. Products such as these help you to go safe in your automotive without using windshield wipers. As Rain X’s primary ingredients include polysiloxanes (in which its functional groups binds with the hydroxyl groups of the glass) which allow impermeability of the glass surface by preserving its surface tension. However Superhydrophobic’s nanostructure can easily be damaged by graze or scuff and it cannot be used in an industry which are more prone to wear and tear.
Noticia completa:
http://wccftech.com/scientists-invent-material-repel-kind-liquid-super-omniphobic-protection (http://wccftech.com/scientists-invent-material-repel-kind-liquid-super-omniphobic-protection/#ixzz3KuvWLv1m)
O próximo passo é construir...............Rapture!
http://cloud-4.steampowered.com/ugc/794064444754594720/8F6DBB942E71F5D97D08857B2BD55BF288D8E27E/
Jorge-Vieira
04-12-14, 10:11
Bioshock, cool :thumbsup:
https://www.youtube.com/watch?v=zxaWgu2qxZw&list=UUtESv1e7ntJaLJYKIO1FoYw
Acho que vou adicionar sódio ao meu loop!! muahahaha
Jorge-Vieira
04-12-14, 14:14
NASA Restarts Manned Space Program With First Test Flight of Orion
NASA (http://hothardware.com/tags/nasa) is working hard to launch its [currently] unmanned Orion spacecraft this morning, though multiple issues have kept it grounded so far. It was initially supposed to blast off at 7:05 AM ET before being put on hold because a boat came too close, followed by another delay due to a gust of wind, and most recently because a fill and drain valve on the rocket did not function correctly. If NASA isn't able to launch Orion by 9:44 AM ET, it will have to wait until another day.
That scenario becomes increasingly likely with each passing moment, especially since mission managers made the decision to cycle the fill and drain valves on Orion's three core boosters to see if that solves the problem. Nevertheless, there's a lot of excitement at NASA.
"We haven't had this feeling in awhile, since the end of the shuttle program," Mike Sarafin, Orion flight director at Johnson Space Center, said in a preflight briefing on Wednesday, according to CNN.
http://hothardware.com/ContentImages/NewsItem/31845/content/Orion.jpg
Orion is NASA's newest spacecraft. It was built to carry humans and designed to allow for travel to destinations we've never been to before, including Mars and even setting foot on an asteroid. It will ultimately serve as a deep exploration vehicle, as well as provide emergency abort missions
Noticia completa:
http://hothardware.com/news/nasa-restarts-manned-space-program-with-first-test-flight-of-orion#pBGUEZlSsP7E5aYR.99
Esperemos que isto tenha sucesso, para recomeçarmos a exploração espacial.
Desde a década de 70 que nenhum ser humano saiu da orbita terrestre.
Jorge-Vieira
04-12-14, 16:50
É verdade, as unicas coisas que têm saído daqui para fora são as sondas.
LIVE: NASA's Orion spacecraft blasts off for space test flight (https://www.youtube.com/watch?v=hOHvCWCv5pk)
Jorge-Vieira
05-12-14, 14:03
The world's largest telescope will be completed by 2024
The European Southern Observatory's Council has announced that it has approved plans to start construction of the world's largest telescope, which will be built-in Chile, and completed by 2024.
http://imagescdn.tweaktown.com/news/4/1/41694_09_the_world_s_largest_telescope_will_be_com pleted_by_2024.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41694_09_the_world_s_largest_telescope_will_be_com pleted_by_2024_full.jpg)
Tim de Zeeuw, the Director General of the ESO said in a statement: "The decision taken by Council means that the telescope can now be built. Major industrial construction work for the E-ELT is now funded and can proceed according to plan". The ESO will build the massive telescope on top of a mountain in Chile called Cerro Armazones, in Chile's Atacama Desert.
Noticia completa:
http://www.tweaktown.com/news/41694/the-world-s-largest-telescope-will-be-completed-by-2024/index.html
Sinceramente, dou pouco valor a estes telescópios terrestres. Pois ficam bastante limitados pela atmosfera terrestre.
Ainda nada bate o Hubble na quantidade e qualidade de imagens do espaço. Em breve o Hubble vai deixar de funcionar e de receber manutenção e upgrades.
Por isso o futuro será o telescópio James Webb. As imagens que o Hubble ainda hoje nos dá são surpreendentes, mas este James Webb vai nos oferecer muito mais.
EDIT:
Para quem não viu o lançamento do Orion em directo, fica aqui o video dele.
https://www.youtube.com/watch?v=hOHvCWCv5pk
Jorge-Vieira
05-12-14, 14:11
E o Hubble nem era para durar tanto, mas o Hubble teve que levar aquela reparação para nos dar as imagens que temos hoje, porque no inicio era um pouco cego :D
A história do Hubble é fantástica, pelo impacto que teve na sociedade.
Quando ele era para ser descontinuado, as pessoas fizeram petições públicas para que o continuassem a reparar e actualizar.
A pressão das pessoas foi tal que a vida do Hubble continuou durante muito mais tempo do que estava planeado.
O sonho da exploração espacial ainda continua bem vivo. Pena os politicos não verem isso e preferirem gastar milhares de milhões em armas.
Jorge-Vieira
05-12-14, 14:20
O sonho da exploração espacial está estagnado, depois da corrida à Lua e das sondas a Marte, pouco mais se tem visto.
Porque não se explora a Lua com mais missões tripuladas lá, porque não se envia ninguém a Marte conforme já esteve previsto e vem sendo sucessivamente adiado.
As unicas coisas que vão saindo da Terra são as sondas ou robots, que vão aos cometas, astereroides ou aos planetas para lá de Marte.
Como dizes e bem, o dinheiro em armamento era muito mais bem empregue nestas coisas.
Não, o dinheiro do armamento e destas coisas era muito mais bem empregue a matar a fome a milhões em África e a combater as doenças todas que lá andam.
Sinceramente, dou pouco valor a estes telescópios terrestres. Pois ficam bastante limitados pela atmosfera terrestre.
Ainda nada bate o Hubble na quantidade e qualidade de imagens do espaço. Em breve o Hubble vai deixar de funcionar e de receber manutenção e upgrades.
Por isso o futuro será o telescópio James Webb. As imagens que o Hubble ainda hoje nos dá são surpreendentes, mas este James Webb vai nos oferecer muito mais.
EDIT:
Para quem não viu o lançamento do Orion em directo, fica aqui o video dele.
https://www.youtube.com/watch?v=hOHvCWCv5pk
Boas!
Estes lançamentos nunca me deixam de fascinar... É impressionante o trabalho de meses e anos para se chegar a este momento e depois em minutos temos ali o tudo ou nada...
É emocionante ver todo aquele trabalho a desenrolar-se em tempo real e tudo correr como previsto...
Fantástico!
Em relação aos telescópios opticos terrestres, bem existem inúmeras vantagens, podes criar Arrays de vários e criar uma composição depois por computador, podes criar espelhos maiores e sensores mais sensíveis já que normalmente sai bem mais barato fazer tudo cá na terra...
Em termos de imagens, verdade que a cintilação provacada pelas diversas camadas da atmosfera e gases que nela existem fazem um pouco de blur, mas isso foi resolvido á já algum tempo com o "adaptic optics" que corrige essa distorção...
No fundo é tudo matemática... sabendo os elementos e as formas de interação é possível matemáticamente prever e retirar o blur da equação...
Algo como os novos compostos que absrovem ou reflectem a totalidade da luz, ou até mesmo aqueles compósitos que anulam a "chuva" diante dos nossos olhos...
Não á nada que não seja possível de fazer através de calculos matemáticos... Apenas não é possível de prever os resultados de um duplo pendulo, que parece reagir de acordo com a lei do caos...
Cumprimentos,
LPC
Jorge-Vieira
05-12-14, 15:08
Existe já o telescopio Keck que combina dois espelhos e algumas dessas tecnologias que falas.
O lançamento de um foguetão destes é algo impressionante. Acredito que quem está envolvido no projecto fica com o coração nas mãos, pois o sucesso do trabalho de vários anos se decidi em alguns minutos.
Sim, ao usarmos lasers para analisar a distorção atmosférica é possível compensar grande parte da distorção causada por esta, mas mesmo assim os resultados apresentados por um satélite no espaço são superiores.
O grande problema é aquele que referes, o custo de um telescópio espacial é bem superior.
O lançamento de um foguetão destes é algo impressionante. Acredito que quem está envolvido no projecto fica com o coração nas mãos, pois o sucesso do trabalho de vários anos se decidi em alguns minutos.
Sim, ao usarmos lasers para analisar a distorção atmosférica é possível compensar grande parte da distorção causada por esta, mas mesmo assim os resultados apresentados por um satélite no espaço são superiores.
O grande problema é aquele que referes, o custo de um telescópio espacial é bem superior.
Boas!
É o custo do telescópio em si (que tem que ser pensado para trabalhar no vacuo e em condições de frio extremas e radiações altas), depois tens o custo por kg ou pound que é extremamente alto actualmente (nunca mais temos os elevadores espaciais... trariam mais segurança e baixariam o custo de meter coisas no espaço bem mais em conta).
E por fim tens o risco de colocação no espaço, com o facto de o foguetão poder explodir em plena elevação...
Portanto para já meter cá na terra é ainda a melhor solução... No entanto também estou com grandes expectativas para o telescópio James Webb, penso que vamos ver o universo de uma forma totalmente nova!
Cumprimentos,
LPC
Jorge-Vieira
08-12-14, 14:15
DirecTV Puts Another Satellite into Space (http://www.hardocp.com/news/2014/12/07/directv_puts_another_satellite_into_space/)
DirecTV has placed a new satellite into orbit a few hours ago and the significance of that event is this satellite is designed specifically to bolster the 4K Ultra HD programming (http://betanews.com/2014/12/07/directv-shoots-satellite-into-space-to-bolster-4k-ultra-hd-offering/). In other words, DirecTV is laying the foundations for expansion of 4K TV next year. Good news for all of you 4K TV owners.
It will be the first commercial satellite to use the Reverse Band Direct Broadcast Satellite (DBS) spectrum, providing additional capacity for the delivery of more 4K Ultra HD programming and other advanced services to DirecTV customers across America including Alaska and Hawaii and Puerto Rico".
Link:
http://www.hardocp.com/news/2014/12/07/directv_puts_another_satellite_into_space#.VIWyXHu VfV0
https://www.youtube.com/watch?v=-TMJ2Uz8dlM
Se for confirmado que a sua trajectória intercepta a da terra, podemos ter um dia bastante barulhento cá na nossa ola azul.
Jorge-Vieira
08-12-14, 21:45
Resta saber os estragos que isso vai fazer... coisas dessas a cair nunca são grandes noticias.
Esperemos também que a densa atmosfera da Terra faça o seu trabalho e consiga reduzir algum desse tamanho da pedra voadora.
Resta saber os estragos que isso vai fazer... coisas dessas a cair nunca são grandes noticias.
Esperemos também que a densa atmosfera da Terra faça o seu trabalho e consiga reduzir algum desse tamanho da pedra voadora.
Boas!
Tudo dependerá da sua composição...
Se for minerais ou metais estamos bem lixados... Pois isso não arde na atmosfera... Se for "pedra" apenas irá ser consumida pela fricção com os gases na atmosfera...
cumprimentos,
LPC
Para quem tiver alguma curiosidade, os estudos escritos por Albert Einstein estão disponibilizados online a partir de hoje, no seguinte site.
http://einsteinpapers.press.princeton.edu/about
Jorge-Vieira
11-12-14, 13:23
Rosetta data suggests comets didn’t seed Earth’s water (http://www.kitguru.net/channel/science/jon-martindale/rosetta-data-suggests-comets-didnt-seed-earths-water/)
As smart as humans like to think they are, we have only been kicking around this planet in our current form for 200,000 years or so. When compared with the age of the universe, or even our own little rock within it, that’s not even a minute on the cosmic calendar. Still, we did manage to land a probe on a comet several hundred million miles away and thanks to it and its orbiting parent’s scientific experiments we now know, probably, that Comets didn’t seed our planet with water. At least not on their own.
The idea that water on Earth came from comets was a theory that has been bandied around for some time, but based on the chemical composition of the water found within the 67P/Churyumov-Gerasimenko comet, that now seems unlikely. Why? Because water on earth is almost entirely H20, that is, two hydrogen molecules combined with an oxygen molecule. However, very occasionally, say one in ever 10,000 water molecules, instead of the Hydrogen-1 isotope (protium) there is instead, a Hydrogen-2 isotope, known as deuterium. Otherwise known as “heavy water.”
On earth, that sort of molecule is very rare, but not in 67P.
Speaking with the BBC’s Radio 4 Inside Science programme (http://www.bbc.co.uk/news/science-environment-30414519), professor Kathrin Altwegg of the University of Bern – who was the principle investigator of the instrument used to measure water on Rosetta – said:
“It is the highest-ever measured ratio of heavy water relative to light water in the Solar System.
“It is more than three times higher than on the Earth, which means that this kind of comet could not have brought water to the Earth.”
http://www.kitguru.net/wp-content/uploads/2014/12/67p-1024x814.jpg
(http://www.kitguru.net/wp-content/uploads/2014/12/67p.jpg)Formed billions of years ago, 67P could hold all sorts of secrets about our solar system’s formation
As convinced as she is however, it’s worth noting that we have only analysed water on two comets that come from the Kuiper belt, a region of space within our solar system that extends beyond the planets. On top of that, the comet other than 67P that we looked at, the much more easy to pronounce, Hartley 2, did contain water profiles much more like our oceans on Earth.
Altwegg believes these differences account for different regions in the formation of the belt during the early life of the solar system. Instead of these comets seeding a young Earth’s water, she believes that asteroids are more likely to be responsible. Her reasoning, was that in samples of asteroids – metorites – that we’ve studied, their “characteristics… are very much like our water.”
She also noted that they orbit closer to the Sun and are therefore far more likely to impact the Earth.
Not everyone agrees of course, with some still holding on to the comet-water theory. Those who do, want us to study comets from closer to the Earth, those currently orbiting between Mars and Jupiter, in what’s known as the “main-belt.”
Noticia completa:
http://www.kitguru.net/channel/science/jon-martindale/rosetta-data-suggests-comets-didnt-seed-earths-water/
Tendo em conta que a molécula de água é a 4º mais comum no universo, o que não faltam são fontes para um planeta, ou lua.
Será de esperar que durante o processo de agregação do nosso sistema solar, tivéssemos pelo meio bastante água.
Tendo em conta que a molécula de água é a 4º mais comum no universo, o que não faltam são fontes para um planeta, ou lua.
Será de esperar que durante o processo de agregação do nosso sistema solar, tivéssemos pelo meio bastante água.
Boas!
Quando se diz água, á que dizer que é mais comum o 2H2O e o 3H20 do que apenas o H20, dai que se tenha detectado mais Agua Pesada do que Água.
Cumprimentos,
LPC
Boas!
Aproveitando o tópico...
Se á algo que me dá sempre a volta a cabeça é como as estrelas de neutroes tem campos magnéticos tão fortes...
Supostamente sendo tudo feito de uma particula NEUTRA como crias um campo magnético? Será a rotação que o cria? Será particulas na atmosfera dessa estrela?
Cumprimentos,
LPC
Jorge-Vieira
11-12-14, 17:32
As estrelas de neutrões são dos objectos mais inigmaticos do universo.
Algumas chegam a ter rotações impressionantes, campos magneticos super poderosos e radiações elevadas.
O que se sabe também que a estrela de neutrões é muito densa, uma colher daquele material aqui na Terra pesava toneladas.
A estrela de neutrões forma-se quando se dá uma super nova e todo o material é colapsado no nucleo da estrela, originando aquele aglomerado, a radiação provem da rotação da estrela.
Jorge-Vieira
11-12-14, 18:38
Boas!
Aproveitando o tópico...
Se á algo que me dá sempre a volta a cabeça é como as estrelas de neutroes tem campos magnéticos tão fortes...
Supostamente sendo tudo feito de uma particula NEUTRA como crias um campo magnético? Será a rotação que o cria? Será particulas na atmosfera dessa estrela?
Cumprimentos,
LPC
Um pequeno video com algumas explicações
https://www.youtube.com/watch?v=zfXPyJmA21Q
E um outro também com algumas explicações
https://www.youtube.com/watch?v=xVN7N0B7kpg
https://www.youtube.com/watch?v=0Ya9cMNQPDU
Jorge-Vieira
12-12-14, 14:05
NASA developing new biodegradable drone, helps the environment
NASA is developing a new bio-drone that could splash down in a body of water, disintegrating while not hurting the environment. The biodegradable drone's chassis is made of mycelium, which is a fiber found in mushrooms - and can also be found on or in soil located near mushrooms.
http://imagescdn.tweaktown.com/news/4/1/41884_01_nasa-developing-new-biodegradable-drone-helps-environment.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41884_01_nasa-developing-new-biodegradable-drone-helps-environment_full.jpg)
"If you have living organisms acting as biosensors and the plane crashes, there certainly could be problems as the plane interacts with the environment," said Lynn Rothschild, NASA developer spearheading the project, in an interview with the team. "Hopefully people could think of this in advance, and design such that this never becomes a problem."
Noticia completa:
http://www.tweaktown.com/news/41884/nasa-developing-new-biodegradable-drone-helps-environment/index.html
Researchers detect possible signal from dark matter (http://www.sciencedaily.com/releases/2014/12/141211115520.htm)
Could there finally be tangible evidence for the existence of dark matter in the Universe? After sifting through reams of X-ray data, scientists in EPFL's Laboratory of Particle Physics and Cosmology (LPPC) and Leiden University believe they could have identified the signal of a particle of dark matter. This substance, which up to now has been purely hypothetical, is run by none of the standard models of physics other than through the gravitational force. Their research will be published next week in Physical Review Letters.
When physicists study the dynamics of galaxies and the movement of stars, they are confronted with a mystery. If they only take visible matter into account, their equations simply don't add up: the elements that can be observed are not sufficient to explain the rotation of objects and the existing gravitational forces. There is something missing. From this they deduced that there must be an invisible kind of matter that does not interact with light, but does, as a whole, interact by means of the gravitational force. Called "dark matter," this substance appears to make up at least 80% of the Universe.
Andromeda and Perseus revisited
Two groups have recently announced that they have detected the much sought after signal. One of them, led by EPFL scientists Oleg Ruchayskiy and Alexey Boyarsky, also a professor at Leiden University in the Netherlands, found it by analyzing X-rays emitted by two celestial objects -- the Perseus galaxy cluster and the Andromeda galaxy. After having collected thousands of signals from the ESA's XMM-Newton telescope and eliminated all those coming from known particles and atoms, they detected an anomaly that, even considering the possibility of instrument or measurement error, caught their attention.
The signal appears in the X-ray spectrum as a weak, atypical photon emission that could not be attributed to any known form of matter. Above all, "the signal's distribution within the galaxy corresponds exactly to what we were expecting with dark matter, that is, concentrated and intense in the center of objects and weaker and diffuse on the edges," explains Ruchayskiy. "With the goal of verifying our findings, we then looked at data from our own galaxy, the Milky Way, and made the same observations," says Boyarsky.
A new era
The signal comes from a very rare event in the Universe: a photon emitted due to the destruction of a hypothetical particle, possibly a "sterile neutrino." If the discovery is confirmed, it will open up new avenues of research in particle physics. Apart from that, "It could usher in a new era in astronomy," says Ruchayskiy. "Confirmation of this discovery may lead to construction of new telescopes specially designed for studying the signals from dark matter particles," adds Boyarsky. "We will know where to look in order to trace dark structures in space and will be able to reconstruct how the Universe has formed."
Jorge-Vieira
14-12-14, 14:11
NASA's OPALS system provides broadband Internet in space
NASA hopes the International Space Station (ISS) will have better Internet courtesy and communications access courtesy of the laser-based Optical Payload for Lasercomm Science (OPALS) instrument. A SpaceX Dragon cargo vehicle delivered OPALS to the ISS in April, and has successfully completed four months of testing - with a focus on minimizing atmospheric turbulence that leads to increased data loss.
http://imagescdn.tweaktown.com/news/4/1/41920_01_nasas-opals-system-provides-broadband-internet-space.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41920_01_nasas-opals-system-provides-broadband-internet-space_full.jpg)
OPALS uses four individual lasers to send a beam down to the JPL's Optical Communications Telescope Laboratory ground station in California. The ground station is able to send four lasers and deliver a payload, and is working on daytime testing.
"OPALS has shown that space-to-ground laser communications transmissions are practical and repeatable," said Matthew Abrahamson, NASA Jet Propulsion Laboratory OPALS mission manager, in a statement published by Space.com. "As a bonus, OPALS has collected an enormous amount of data to advance the science of sending lasers through the atmosphere. We look forward to continuing our testing of this technology, which sends information to and from space faster than with radio signals."
Noticia:
http://www.tweaktown.com/news/41920/nasas-opals-system-provides-broadband-internet-space/index.html
Jorge-Vieira
14-12-14, 14:17
Google works with France's space agency on next-gen Internet balloons
Google has already teamed up with the leading telecommunications company in Australia on its Internet balloon technology, but now its teaming up with France's space agency, Centre National d'Etudes Spatiales (CNES).
The search giant has said that it has been working with the semi-secret lab for 12 months now, in order to take Project Loon to the next level. CNES has been helping Google analyze data from its ongoing tests, as well as getting the design of its next-gen Project Loon technology into the air. Google will help CNES work on long-haul balloon flights into the stratosphere.
Google's VP in charge of the project, Mike Cassidy, said: "No single solution can solve such a big, complex problem. That's why we're working with experts from all over the world, such as CNES, to invest in new technologies like Project Loon that can use the winds to provide Internet to rural and remote areas". CNES' Toulouse Space Center director Mark Pircher admitted that when Google first approached the space agency and told them their plans, he didn't think Project Loon was that realistic.
http://imagescdn.tweaktown.com/news/4/1/41918_04_google-works-frances-space-agency-next-gen-internet-balloons.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41918_04_google-works-frances-space-agency-next-gen-internet-balloons_full.jpg)
It may sound hard to believe, as Google wants to get 100,000 balloons into the air to provide Internet connectivity to remote places all around the world, and then retrieve them when they lose air. Google did team up with CNES in the end, so the team at the French space agency must have seen the light, with some people thinking Project Loon has some great ideas behind it, which could "reduce the cost of the balloons by 10 times or so".
Noticia:
http://www.tweaktown.com/news/41918/google-works-frances-space-agency-next-gen-internet-balloons/index.html
Jorge-Vieira
14-12-14, 14:22
NASA being given extra funds in 2015, as space research accelerates
The House of Representatives issued the "Cromnibus" bill that will give NASA an $18 billion budget in 2015, a 2 percent increase than 2014, while also giving NASA more than $500 million it requested. Pres. Obama's original $17.5 billion budget request asked for $4.79 billion to be used for the Science Mission Directorate, $1.28 billion to planetary sciences research - the Science Mission Directorate will receive $5.24 billion and $1.44 billion towards planetary sciences.
http://imagescdn.tweaktown.com/news/4/1/41908_01_nasa-being-given-extra-funds-2015-space-research-accelerates.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41908_01_nasa-being-given-extra-funds-2015-space-research-accelerates_full.jpg)
The additional budget should be welcome news for the US space agency, which has fallen short of federal budget targets in past years. This is good news for NASA, which must spend at least $100 million of the budget to launch a robot probe to Jupiter's icy moon of Europa.
Noticia completa:
http://www.tweaktown.com/news/41908/nasa-being-given-extra-funds-2015-space-research-accelerates/index.html
Toca a comprar os bilhetes para Marte:D
Jorge-Vieira
14-12-14, 17:35
Estão esgotados :D
Então vou na TAP...........................oh wait, estão em greve!
A TAP está pior que a CP, irrrraaaa
Depois não querem privztizações... Só lhes dão razão
Em Portugal as empresas públicas apenas servem para haver greves, prejuízos e sindicatos a reivindicar. De resto não há rei nem roque. O patrão é o Estado, portanto não tem de responder a alguém diretamente, o Estado nesse caso é sempre dos outros por isso que se lixe, depois é só prejuízos enormes. TAP e CP, privatizar já. Andam as pessoas a perder tempo e dinheiro quando são clientes destas empresas para elas andarem metade do ano em greves? Mesmo que as pessoas não sejam clientes destas empresas têm de sustentar os prejuízos avultados por conta de tanta greve? Não! Chega disto!
Em Portugal as empresas públicas apenas servem para haver greves, prejuízos e sindicatos a reivindicar. De resto não há rei nem roque. O patrão é o Estado, portanto não tem de responder a alguém diretamente, o Estado nesse caso é sempre dos outros por isso que se lixe, depois é só prejuízos enormes. TAP e CP, privatizar já. Andam as pessoas a perder tempo e dinheiro quando são clientes destas empresas para elas andarem metade do ano em greves? Mesmo que as pessoas não sejam clientes destas empresas têm de sustentar os prejuízos avultados por conta de tanta greve? Não! Chega disto!
Boas!
Ninguem quer a CP ou a REFER... Aquilo é do mais cancro que existe... O Passivo acumulado é incrivelmente alto...
Cumprimentos,
LPC
Boas!
Ninguem quer a CP ou a REFER... Aquilo é do mais cancro que existe... O Passivo acumulado é incrivelmente alto...
Cumprimentos,
LPC
Também era o de outras empresas e não as deixaram de vender.. Não há nada que não se arranje, tem é de ser pelo preço certo.. Mas também não façam o mesmo que o BPN, que foi vendido a preço de saldos ao BIC
O problema é que para alguns a TAP é tida como empresa de interesse patriótico.. Tipo :facepalm:
Limpem o tópico para o Conversa da Treta, que isso de ciência e polítiquisse não combina nada...
Limpem o tópico para o Conversa da Treta, que isso de ciência e polítiquisse não combina nada...
Fui eu quem começou o desvio e já me arrependi. Mas concordo contigo.
Jorge-Vieira
15-12-14, 15:37
NASA Mars Opportunity rover experiences flash storage failure
Much like most other equipment launched into space the NASA rover Opportunity utilizes tried-and-true flash memory for data storage on its trek across the surface of Mars. Flash memory isn't as susceptible to vibration as other forms of data storage and operates better in temperature extremes, which works out great for equipment hurling its way through the cosmos. The rigors of spaceflight and the surface of Mars can push even the most durable equipment to the edge, as witnessed by the latest round of memory failures onboard the Opportunity rover.
http://imagescdn.tweaktown.com/news/4/1/41980_01_nasa-mars-opportunity-rover-experiences-flash-storage-failure.png (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/1/41980_01_nasa-mars-opportunity-rover-experiences-flash-storage-failure_full.png)
Scientists reformatted the flash memory on the resilient little rover over the weekend, but things didn't go quite as planned. Now the rover is suffering from amnesia events and system resets. NAND is a persistent memory technology, it can retain data even without power, unlike RAM. The rover stores all data collected during the day in its onboard RAM memory, but when the rover 'sleeps' at night that data is typically copied over to NAND flash storage. The problems encountered during the flash formatting have placed the rover in a RAM-only mode, and data has to be beamed off to Earth each night before sleep. Scientists are working diligently to code a workaround that will avoid using one of the seven banks of NAND that is experiencing the issue.
"The mission can continue without storing data to flash memory, and instead store data in volatile RAM," said Mars Exploration Rover Project Manager John Callas or NASA's Jet Propulsion Laboratory, Pasadena, California. "While we're operating Opportunity in that mode, we are also working on an approach to make the flash memory usable again. We will be sure to give this approach exhaustive reviews before implementing those changes on the rover."
The Opportunity rover is far beyond its projected lifespan and has been perusing the surface of Mars since 2004. Its current mission takes the hardy little rover to the southwest rim of Endeavour Crater to study clay minerals detected by the Mars Reconnaissance Orbiter.
Noticia:
http://www.tweaktown.com/news/41980/nasa-mars-opportunity-rover-experiences-flash-storage-failure/index.html
Jorge-Vieira
16-12-14, 15:56
Stanford University will study effects of artificial intelligence
Stanford University will study artificial intelligence over the next 100 years, as part of a long-lasting study to see how AI impacts the US economy, war, crime, and society as a whole. There is growing concern that AI developments, while extremely impressive, could displace human workers and create something that may have disastrous long-term effects.
http://imagescdn.tweaktown.com/news/4/2/42006_01_stanford-university-study-effects-artificial-intelligence.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42006_01_stanford-university-study-effects-artificial-intelligence_full.jpg)
"Loss of control of A.I. systems has become a big concern," said Dr. Horvitz, Microsoft Research managing director, in a statement to the New York Times. "Rather than simply dismiss these dystopian claims, he said, scientists instead must monitor and continually evalutate the technologies. Even if the anxieties are unwarranted, they need to be addressed."
Noticia completa:
http://www.tweaktown.com/news/42006/stanford-university-study-effects-artificial-intelligence/index.html
Ainda estamos muito longe de ter uma IA capaz de ter consciência a agir contra o sr humano.
Neste momento não temos computadores sequer com a capacidade de fazer os cálculos de voo que uma mosca faz. Quanto mais o pensamento humano.
Por enquanto apenas temos calculadoras muito eficientes.
Ainda estamos muito longe de ter uma IA capaz de ter consciência a agir contra o sr humano.
Neste momento não temos computadores sequer com a capacidade de fazer os cálculos de voo que uma mosca faz. Quanto mais o pensamento humano.
Por enquanto apenas temos calculadoras muito eficientes.
Boas!
Apenas quando os computadores quanticos estiverem ai é que veremos como se comporta um programa de aprendizagem/erro...
Cumprimentos,
LPC
Talvez. Mas mesmo assim ainda estamos a muitos anos de termos uma IA consciente, se calhar décadas.
Jorge-Vieira
17-12-14, 14:25
Mars may have methane producing microbes (http://www.kitguru.net/channel/science/brendan-morgan/mars-may-have-methane-producing-microbes/)
In a paper released in the Science academic journal a few days ago, a group of NASA scientists has confirmed the existence of methane gas on Mars. This is a good indicator of life, as 95% of methane here on Earth is generated by Microbes. While this is in itself impressive, some of the other facts about their findings, make this an even more interesting discovery!
Over the past 20 months, NASA made observations using the Tunable Laser Spectrometer (TLS) on the Curiosity rover. This has shown large bursts over the usual background levels of atmospheric methane, sometimes more than 10 times the usual amount.
http://www.kitguru.net/wp-content/uploads/2014/12/pia19088_atreya1-1024x768.jpg
While scientists cannot yet be sure exactly what is sending these bursts of gas into the Martian atmosphere, they do have a few theories. The leading one is that the methane is escaping from under the surface of the red planet in an outgassing, similar to the way that a geyser works here on earth.
NASA has also released findings from several drilling samples, which show Martian organic chemicals in the dust produced by the drill. These are “the first definitive detection of organics in surface materials of Mars.” according to the space agency. It cannot be sure however if these were formed on Mars itself, or if they were brought to the planet by meteorites.
Hopefully when the European Space Agency’s ExoMars touches down in January 2019, it will be able to confirm some of these NASA findings. Failing that NASA hopes to have the first humans on Mars in the 2030s, so not long to wait!
Noticia:
http://www.kitguru.net/channel/science/brendan-morgan/mars-may-have-methane-producing-microbes/
Os locais com maior exposição a radiação ionizante.
Alguns destes locais vão surpreender, pelos valores apresentados.
Este video também ajuda a eliminar alguns mitos sobre a radiação ionizante.
https://www.youtube.com/watch?v=TRL7o2kPqw0
Jorge-Vieira
18-12-14, 15:14
SpaceX plans to land a rocket on a drone ship, tomorrow (http://www.kitguru.net/channel/science/brendan-morgan/spacex-plans-to-land-a-rocket-on-a-drone-ship-tomorrow/)
If you are a fan of potential failure and large explosions then tomorrow could be a good day for you! SpaceX, the US rocket company owned by Elon Musk, is planning to land one of its Falcon 9 rockets on a sea-based floating platform known as the “autonomous spaceport drone ship”.
That’s not me being pessimistic by the way. SpaceX itself has predicted that the probable outcome of success is “perhaps 50% at best”. The main reason that it is so low, is that this has never been attempted before. The closest it has come to this in testing was around five months ago when it soft landed a Falcon 9 first stage straight into the Atlantic Ocean, as you can see in the video below.
https://www.youtube.com/watch?v=uIlu7szab5I
“At 14 stories tall and traveling upwards of 1300 m/s (nearly 1 mi/s), stabilizing the Falcon 9 first stage for reentry is like trying to balance a rubber broomstick on your hand in the middle of a wind storm,” a SpaceX spokesperson said.
Three extra burns will be needed to try to bring the first stage down in the correct place. The first will roughly position where it will land, the second will then slow it down from 1300 m/s to about 250 m/s, while the third burn will slow it down again from 250 m/s to just two m/s and this should allow it to accurately land once the legs have deployed.
http://www.kitguru.net/wp-content/uploads/2014/12/autonomous_spaceport_drone_ship-1024x769.jpg
The autonomous spaceport drone ship is 300 by 100 feet
This really is not going to be easy for SpaceX, but even if tomorrows test is a failure, it will persist, as it will have several other opportunities in the coming months’ launches to test the landing and gather more data, which should increase the likelihood of success in future attempts
Nolticia:
http://www.kitguru.net/channel/science/brendan-morgan/spacex-plans-to-land-a-rocket-on-a-drone-ship-tomorrow/
Jorge-Vieira
19-12-14, 14:49
NASA's Kepler spacecraft finds HIP 116454b alien exoplanet
It wasn't too long ago when the Kepler planet-hunting spacecraft was considered a lost cause, due to problems with its reaction wheels. Instead, the spacecraft proved its worth yet again, as it found the HIP 116454b exoplanet, larger than Earth and smaller than Neptune, orbiting around a star in just nine days. The planet is too hot for life, and is more than 180 light-years away from Earth, located in the Pisces constellation.
http://imagescdn.tweaktown.com/news/4/2/42116_02_nasas-kepler-spacecraft-finds-hip-116454b-alien-exoplanet.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42116_02_nasas-kepler-spacecraft-finds-hip-116454b-alien-exoplanet_full.jpg)
Planets such as HIP 116454b are good prospects for future follow-up ground studies, as researchers try to gain mass measurements.
"Today, thanks to an innovative idea and lots of hard work by the NASA and Ball Aerospace team, Kepler may well deliver the first candidates for follow-up study by the James Webb Space Telescope to characterize the atmospheres of distance world's and search for signatures of life," said Paul Hertz, NASA astrophysics division director.
Noticia:
http://www.tweaktown.com/news/42116/nasas-kepler-spacecraft-finds-hip-116454b-alien-exoplanet/index.html
Jorge-Vieira
19-12-14, 17:51
Christmas lights are so bright, NASA can see them from space
There is such a drastic increase in lighting during the holidays that NASA has picked up on it, according to a press release published by the U.S. space agency. Specifically, the NOAA/NASA Suomi National Polar-orbiting Partnership satellite found that metropolitan areas increased 20 to 50 percent brighter during the Christmas holiday season and New Year's.
https://www.youtube.com/watch?v=uU0u0LRTNSk
Noticia completa:
http://www.tweaktown.com/news/42118/christmas-lights-bright-nasa-see-space/index.html
No futuro as luzes de Natal serão tão fortes que os extra-terrestres vão pensar que o nosso planeta é uma estrela.
No futuro as luzes de Natal serão tão fortes que os extra-terrestres vão pensar que o nosso planeta é uma estrela.
Looooooooooool...
Só se for uma anã castanha... ou melhor ainda... uma anã chinesa, já que a maioria dos leds de natal é made in china...
Cumprimentos,
LPC
Impressionante o que a ciência e tecnologia consegue fazer para mudar a vida das pessoas.
https://www.youtube.com/watch?v=9NOncx2jU0Q#t=30
Impressionante o que a ciência e tecnologia consegue fazer para mudar a vida das pessoas.
https://www.youtube.com/watch?v=9NOncx2jU0Q#t=30
Boas!
Sem dúvida, vamos ver neste século, o desenvolvimento de componentes biónicos que vão melhorar em muito a vida das pessoas...
Cumprimentos,
LPC
Jorge-Vieira
20-12-14, 16:33
NASA e-Mail a Wrench into Space
Made with Flare More Info'> http://cdn.eteknix.com/wp-content/uploads/2014/12/nasa-wrench-800x532.jpg
There are no hardware stores in space. That’s the unfortunate reality that Barry Wilmore, Commander of the International Space Station (ISS), faced when he was left needing a wrench. Once staff at NASA became aware that Wilmore was missing the tool that he needed, they decided to e-mail him one.
Aboard the ISS is a 3D printer, designed by California-based Made In Space. The company designed a CAD template for the ratcheting socket wrench Wilmore required. The CAD file was e-mailed to him at the ISS, he fed it into the 3D printer, and the wrench was created within minutes. Although many objects have been printed on-board the ISS before, this is the first time custom item has been designed and then transmitted to the station and manufactured.
Mike Chen from Made In Space said, “On the ISS this type of technology translates to lower costs for experiments, faster design iteration, and a safer, better experience for the crew members, who can use it to replace broken parts or create new tools on demand.”
Noticia:
http://www.eteknix.com/nasa-e-mail-wrench-space/
Será que também enviam cafés :D
https://www.youtube.com/watch?v=86yCnIxB8uY
Jorge-Vieira
21-12-14, 14:24
Genetic code utilization for passwords is a real thing
"Your genetic code is the correspondence between the 20 types of amino acids and the 61 types of messenger RNA triplets (codons, representing DNA) that specify them," explains Gizmodo (http://www.gizmodo.com.au/2014/12/how-you-can-use-the-genetic-code-for-passwords/) in a recently published article.
http://imagescdn.tweaktown.com/news/4/2/42155_04_genetic-code-utilization-passwords-real-thing.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42155_04_genetic-code-utilization-passwords-real-thing_full.jpg)
If you're not sure what to set for your next password and your general spiel of letters, numbers and symbols aren't doing it for you - maybe it's time you tried genetic code. These codes are said to give you nearly infinite password outputs, helping ensure hackers steer clear from your precious Farmville and Candy Crush trophies.
These genetic condons spell the same amino acids to all organisms. "The RNAs of humans, hydras, hippos, hydrangeas,Haemophilus influenzae, and even viruses follow the same rules," explains Gizmodo, further mentioning that the reason human proteins are manufactured in bacterial cells is because everything follows the same rules.
"We would not have to get polynucleotide synthesis very far to break the coding problem ... we could crack life's code" are some choice words from Dr. Marshall Nirenberg in his published research book (http://history.nih.gov/exhibits/nirenberg/hs4_polyu.htm), this came after he conducted demonstration experiments in 1960 and 1961 on Francis Crick's proposal to use genetic code words (condons) for these types of applications.
Noticia completa:
http://www.tweaktown.com/news/42155/genetic-code-utilization-passwords-real-thing/index.html
Jorge-Vieira
22-12-14, 18:22
NASA quer ter humanos a viver no céu de Vénus
Marte tem sido o destino mais cobiçado pelas entidades que trabalham na exploração espacial. Mas porque não Vénus visto que em termos de distância é o planeta mais próximo da Terra? A NASA tem agora uma plano para tomar o planeta de assalto. Porque apontamos sempre para Marte se temos Vénus aqui tão “perto”? A questão é respondida com as condições pouco favoráveis do planeta para o suporte da vida humana. Além de as temperaturas no solo rondarem os 455 graus, a pressão da atmosfera é 90 vezes superior à da Terra ao nível do mar.
Um grupo de cientistas da NASA criou um plano onde Vénus é habitável por humanos, mas em “cidades” voadoras. Os cientistas defendem que a 50 quilómetros do solo venusiano a temperatura é muito mais suportável – ronda os 70 graus – e a pressão atmosférica é igual à da Terra.
O nível de radiação também seria muito aceitável – o Engadget (http://www.engadget.com/2014/12/22/nasa-havoc-venus-airships/) diz que equivalentes aos que existem no Canadá -, uma questão que em Marte não é convidativa. Por exemplo, a radiação marciana é um dos grandes desafios (http://tek.sapo.pt/multimedia/estas_sao_as_casas_nas_quais_os_humanos_podem_1404 775.html) que o projeto português Seed (http://tek.sapo.pt/multimedia/vegetais_a_crescer_em_marte_com_o_projeto_por_1424 250.html) terá de enfrentar caso seja escolhido para a iniciativa Mars One (http://tek.sapo.pt/noticias/computadores/existem_tres_portugueses_entre_as_705_pessoas_1382 638.html).
Os humanos viveriam em zeplins de grandes dimensões e cujo “balão” seria revestido por painéis solares. O projeto que tem a denominação de HAVOC (http://sacd.larc.nasa.gov/branches/space-mission-analysis-branch-smab/smab-projects/havoc/) faria ainda uso de tecnologia de painéis “origamis” (http://tek.sapo.pt/multimedia/nasa_inspira_se_nos_origami_para_construir_no_1404 549.html) que quando dobrados ocupam muito pouco espaço – em comparação com o tamanho da estrutura total.
Noticia completa:
http://tek.sapo.pt/multimedia/nasa_quer_ter_humanos_a_viver_no_ceu_de_venus_1425 436.html
Alguém andou a jogar muito Bioshock Infinite... :P
Jorge-Vieira
23-12-14, 09:40
A NASA lançou mais um video da nossa estrela, o Sol
https://www.youtube.com/watch?v=BvyA6JwddPQ
Scientists are using 300 PS3 consoles to research black holes (http://www.kitguru.net/channel/science/matthew-wilson/scientists-are-using-300-ps3-consoles-to-research-black-holes/)
The last generation consoles may still be useful after all as scientists have configured 200 PlayStation 3 consoles together to create a low cost super computer, which is being used to help research black holes. The console array was first created all the way back in 2007, featuring just 16 consoles.Over time, Dr. Gaurav Khanna has added more and more consoles to the mix, hitting a maximum of two hundred. One of the reasons Khanna chose the PlayStation 3 is because users can install alternative operating systems on it, such as Linux. Obviously, cost was also a factor.
http://www.kitguru.net/wp-content/uploads/2014/12/ps3-80gb-fat-e1419360283977.jpg (http://www.kitguru.net/wp-content/uploads/2014/12/ps3-80gb-fat-e1419360283977.jpg)
“Science has become expensive”, he told The New York Times. “There’s simply not that much money going around, either at the university or the federal level. Supercomputing allows scientists to make up for the resources they don’t have.”
The supercomputer is used to research gravitational waves and black holes. Since we can’t see black holes with telescopes, scientists are forced to simulate the waves they produce using computers. Khanna’s initial work helped inspire the Air Force Research lab in its own tests, which in 2010, made use of 1716 networked PlayStation 3 consoles.
O único problema é que este sistema apenas detecta buracos negros que andam a 30 fps. :D
Foi só a mim que o forúm fritou com a formatação do avesso e com a indicação de ter sido banido?
Foi só a mim que o forúm fritou com a formatação do avesso e com a indicação de ter sido banido?
Foi geral! :)
O Desejo de muitos por minutos se concretizou! muahahahahahahahah
Foi só a mim que o forúm fritou com a formatação do avesso e com a indicação de ter sido banido?
Aqui também ficou assim durante umas horas.
Deve ter sido um ataque da Coreia do Norte. Isso, ou foi o caganamata que decidiu fazer um DDoS.
BTW: Esta conversa devia estar no tópico da conversa da treta, ou nos assuntos do forum.......
Era para ser o caso.. reparei agora que o Tapatalk pôs isto no tópico errado, eheh...
Boas Companheiros...
Estava ali entretido com os meus subalternos com os seus Windows 95 a tentar hackar a Paramount Pictures...
LOL
Agora a sério, houve um update no mysql e para não variar deu raia a actualização (ainda por cima é automática), só detectei isso aqui passado algum tempo (não estive por cá).
O problema entretanto foi resolvido assim que foi visto...
Digam lá que não gostaram de ver o Ban geral a todos os utilizadores (eu incluido!), Kim Jun LPC não brinca em serviço é logo a matar tudo... :) hehehehe
Cumprimentos,
LPC
Jorge-Vieira
24-12-14, 14:38
A New Way to Reach Mars Safely, Anytime and on the Cheap
<section class="article-content"> <section class="article-content">http://www.scientificamerican.com/sciam/cache/file/83454504-6F09-446E-92E6642C96A695C5_article.jpg?E5D35</section>
Getting spacecraft to Mars is quite a hassle. Transportation costs can soar into the hundreds of millions of dollars, even when blasting off during "launch windows"—the optimal orbital alignments of Earth and Mars that roll around only every 26 months. A huge contributor to that bottom line? The hair-raising arrivals at the Red Planet. Spacecraft screaming along at many thousands of kilometers per hour have to hit the brakes hard, firing retrorockets to swing into orbit. The burn can require hundreds of pounds of extra fuel, lugged expensively off Earth, and comes with some risk of failure that could send the craft careening past or even right into Mars.
This brute force approach to attaining orbit, called a Hohmann transfer, has served historically deep-pocketed space agencies well enough. But in an era of shrinking science budgets the Hohmann transfer's price tag and inherent riskiness look limiting.
Now new research lays out a smoother, safer way to achieve Martian orbit without being restricted by launch windows or busting the bank. Called ballistic capture, it could help open the Martian frontier for more robotic missions, future manned expeditions and even colonization efforts. "It's an eye-opener," says James Green, director of NASA's Planetary Science Division. "It could be a pretty big step for us and really save us resources and capability, which is always what we're looking for."
The premise of a ballistic capture: Instead of shooting for the location Mars will be in its orbit where the spacecraft will meet it, as is conventionally done with Hohmann transfers, a spacecraft is casually lobbed into a Mars-like orbit so that it flies ahead of the planet. Although launch and cruise costs remain the same, the big burn to slow down and hit the Martian bull's-eye—as in the Hohmann scenario—is done away with. For ballistic capture, the spacecraft cruises a bit slower than Mars itself as the planet runs its orbital lap around the sun. Mars eventually creeps up on the spacecraft, gravitationally snagging it into a planetary orbit. "That's the magic of ballistic capture—it's like flying in formation," says Edward Belbruno, a visiting associated researcher at Princeton University and co-author, with Francesco Topputo of the Polytechnic University of Milan, of a paper detailing the new path to Mars and the physics behind it. The paper, posted on arXiv, has been submitted to the journal Celestial Mechanics and Dynamical Astronomy.
"A delicate dance"
Ballistic capture, also called a low-energy transfer, is not in of itself a new idea. While at NASA's Jet Propulsion Laboratory a quarter century ago, Belbruno laid out the fuel-saving, cost-shaving orbital insertion method for coasting probes to the Moon. A Japanese vessel, called Hiten, first took advantage in 1991, as did NASA's GRAIL mission, launched in 2011.
Belbruno worked out how to let the competing gravities of Earth, the sun and moon gently pull a spacecraft into a desired lunar orbit. All three bodies can be thought of as creating bowl-like depressions in spacetime. By lining up the trajectory of a spacecraft through those bowls, such that momentum slackens along the route, a spacecraft can just "roll" down at the end into the moon's small bowl, easing into orbit fuel-free. "It's a delicate dance," Belbruno says.
Unfortunately, pulling off a similar maneuver at Mars (or anywhere else) seemed impossible because the Red Planet's velocity is much higher than the Moon's. There appeared no way to get a spacecraft to slow down enough to glide into Mars' gravitational spacetime depression because the "bowl," not that deep to begin with, was itself a too-rapidly moving target. "I gave up on it," Belbruno says.
However, while recently consulting for the Boeing Corp., the major contractor for NASA's Space Launch System, which is intended to take humankind to Mars, Belbruno, Topputo and colleagues stumbled on an idea: Why not go with the flow near Mars? Sailing a spacecraft into an orbital path anywhere from a million to even tens of millions of kilometers ahead of the Red Planet would make it possible for Mars (and its spacetime bowl) to ease into the spacecraft's vicinity, thus subsequently letting the spacecraft be ballistically captured. Boeing, intrigued by this novel avenue to Mars, funded the study, in which the authors crunched some numbers and developed models for the capture.
Expanding our Martian horizons
Ballistic capture is not the only fuel-saving technique for entering orbit. In another approach, called aerocapture, an arriving spacecraft dives into the Martian atmosphere and lets friction eat away at some of its excess velocity, rather than relying solely on a big fuel burn to do the trick. That method, however, requires a heavy heat shield, which adds extra mass and thus costs to liftoff, offsetting the penny-pinching on fuel for a Hohmann transfer burn on arrival. Ballistic capture, Topputo says, is "slower and gentler."
Ballistic capture therefore offers many advantages over current approaches for heading to Mars. Beyond avoiding the fuel-guzzling of a Hohmann transfer, for instance, it reduces danger to the craft because the vessel no longer must decelerate on a dime in a tight window near Mars, risking over- or undershooting its mark.The approach also drops fuel needs for the overall journey by 25 percent, Belbruno says, in a rough estimate. That reduction could be used to save money but it could also, instead, allow for bigger payloads at comparable prices. Delivering more mass to Martian orbit can then mean getting more robotic rovers, supplies or what have you to the surface. "What we want to do is leverage to put more mass on the ground," Green says. "That's the dream."
Avoiding the need to send the rocket up during rare launch windows would also be a big deal because launch delays are notoriously frequent. Missing a window can mean grounding a Mars mission for two years, plus wasted launch prep costs.
[B]For 'bots, as well as bodies?
Ballistic capture does come with plenty of caveats, of course. A straight shot with abrupt braking at Mars takes about six months whereas a trip relying on ballistic capture would take an additional several months.The burn-free, capture altitude is also quite high—some 20,000 kilometers above Mars, far beyond where science satellites set up shop to scrutinize the planet up close. But taking along just a little extra fuel can then gently lower a ballistically captured spacecraft into scientifically valuable, standard orbits of around 100 to 200 kilometers like those achieved with Hohmann transfers—or even onward to the Martian surface for a landing.
For manned missions, ballistic transfer would be a mixed blessing. On one hand, its longer journeys would add to the challenges of ferrying people to Mars. We're already worried about Mars-bound explorers driving each other crazy stuck in a tin can for six months, not to mention soaking up unacceptably high space radiation doses. For that reason, robotic missions look to be the first potential beneficiaries of Belbruno and Topputo's new low-energy transfers.
On the other hand, because the need for launch windows would go away, ballistic capture could maintain a steady stream of supplies to the planet. Any extended Mars habitation effort would probably depend on Earth for materiel, at least until the establishment of self-sufficient farming and manufacturing. "Ballistic capture would be a good way to send supplies to Mars in advance of a manned mission," Belbruno says, "or as part of one."
NASA's Green agrees. "This [ballistic capture technique]could not only apply here to the robotic end of it but also the human exploration end," he says. Accordingly, Green arranged for Belbruno to speak with the agency’s Johnson Space Center staff back in October about how manned missions might exploit the concept.
Even further down the road, ballistic capture would be perfect, Belbruno says, for placing satellites into "areostationary" orbits—the same as geostationary (http://www2.jpl.nasa.gov/basics/bsf5-1.php), except at Mars (aka Ares). The upshot: Martian Internet and cell phone networks, anyone? If the new low-energy transfer works at Mars, it could, in theory, also be extended to deliver matter in bulk to any world in the solar system.
This potential breakthrough research is admittedly still in an early, theoretical phase. Ongoing work includes reworking the calculations of the physics by factoring in smaller influences on a Mars-bound spacecraft than the pull of gravity from Mars itself, such as Jupiter’s gravitational pull.NASA's Green said he envisions the agency wanting to test ballistic capture transfers at Mars in the 2020s.
Belbruno has his fingers crossed. "The route to the moon I found in 1991 was thought to be perhaps the only application of my theory," he says. "I am very excited about this Mars result."
</section>
Noticia:
http://www.scientificamerican.com/article/a-new-way-to-reach-mars-safely-anytime-and-on-the-cheap/
A ideia não é má, mas duplicar o tempo de viagem é bastante mau, especialmente para seres vivos.
A viagem para Marte já implica a exposição dos tripulantes a enormes quantidades de radiação, as quais ainda temos dificuldade em controlar. Se aumentarmos o tempo de viagem, aumentamos a exposição dos tripulantes.
E depois temos o problema de termos pessoas durante um ano enfiados num caixote. Mesmo após uns meses na ISS, um astronauta fica com problemas musculares e ósseos. Numa viagem a Marte tão longa o problema vai-se a gravar.
Jorge-Vieira
27-12-14, 10:51
This time-lapse video from the ISS reveals a stunning view of our planet
https://www.youtube.com/watch?v=lNwWOul4i9Y
German astronaut Alexander Gerst (http://blogs.esa.int/alexander-gerst/) recently returned from a six-month stint aboard the International Space Station. Between conducting various experiments in Lower Earth Orbit as part of his Blue Dot mission, the astronaut managed to capture 12,500 strategic images of our little blue planet that have since been stitched together to create the stunning time-lapse clip embedded above.
The video has it all – auroras, sunrises, clouds, stars, oceans, the Milky Way, lightning, cities at night and more. Best yet, it’s available to watch at up to 4K resolution should your display support it.
Noticia:
http://www.techspot.com/news/59245-time-lapse-video-iss-reveals-stunning-view-our.html
O video está excelente, vale a pena ver :thumbsup:
Lindo. E deu para ver a minha casa :D
Uma coisa que me surpreende sempre é como a luz no espaço é tão limpa e pura, quando comparada com a luz que recebemos cá em baixo depois de passar pela atmosfera.
Já que estamos numa de ISS, podem vê-la aqui 24/7 a sobrevoar a terra. Dá para tirar screenshots espectaculares.
Se por vezes o vídeo do stream ficar todo preto, é normal, é a ISS a atravessar zonas encobertas do sol.
http://www.ustream.tv/channel/iss-hdev-payload
EDIT: Parece que a transmissão está com problemas neste momento, tentem mais tarde.
Jorge-Vieira
29-12-14, 13:29
World’s Largest Floating Solar Power Plant Coming to Japan
http://cdn.eteknix.com/wp-content/uploads/2014/12/solar-dam.jpg
Renewable energy venture Kyocera TCL has announced plans for a floating 13.4 MW solar power plant on the Yamakura Dam reservoir in Chiba Prefecture, Japan. In terms of capacity/output, the solar plant will become the largest of its kind in the world.
The plant will take up an area of 180,0002, with an output of 15,635 MWh/year, or ¥450 million-worth of electricity per year. Kyocera is also building a number of other solar installations over Nishihira Pond and Higashihira Pond in Kato City, with plans to build another 30 plants between 2015 and 2016.
Japan has invested over $30 billion in solar energy over the last year, and is on course to usurp China as the largest solar installer in the world.
Noticia:
http://www.eteknix.com/worlds-largest-floating-solar-power-plant-coming-japan/
Jorge-Vieira
30-12-14, 08:50
Large Hadron Collider Now Has Twice The Power (http://www.hardocp.com/news/2014/12/29/large_hadron_collider_now_has_twice_power/)
Great news everyone! The Large Hadron Collider is coming back online (http://www.independent.co.uk/life-style/gadgets-and-tech/news/large-hadron-collider-ready-to-delve-even-deeper-than-god-particle-as-it-switches-back-on-at-double-power-9948724.html) with twice the <del>explosive</del> power. http://www.hardocp.com/images/smiley/wink.gif
CERN’s Large Hadron Collider is set to be switched back on in March — hoping that a £97 million upgrade could push it to even greater discoveries, after it found the "God particle" in 2012. The second three year run of the huge atom smasher will begin in March 2015. The Large Hadron Collider has been switched off since its last run finished in 2012.
Noticia:
http://www.hardocp.com/news/2014/12/29/large_hadron_collider_now_has_twice_power#.VKJnJf8 BA
Essa noticia do LHC com a tua assinatura........................
Jorge-Vieira
30-12-14, 12:15
É tudo pensado :)
https://www.youtube.com/watch?v=kRJuvDZqdBw
Jorge-Vieira
30-12-14, 14:32
Sibéria: degelo rápido do permafrost está a provocar fugas de metano tóxico
http://greensavers.sapo.pt/wp-content/themes/codistage/thumb.php?src=files/permafrost_SAPO1.jpg&w=570&h=280&zc=1&q=90
A Península de Yamal, na Sibéria, é uma das regiões russas que está coberta por permafrost – solo permanentemente gelado. Porém, debaixo deste pergelissolo existem grandes quantidades de metano, que são apenas retidas pelo gelo.
Com o aparecimento de crateras gigantescas ao longo do ano nesta região, algum deste metano tóxico – um gás com efeito estufa – começou a ser libertado para a atmosfera. Porém, o problema de Yamal não acaba aqui. O gás está também a vazar do fundo oceânico da região, criando colunas de gás aquáticas com mais de 24 metros de altura. Estima-se que mais de 7.500 metros quadrados de metano tenham sido já libertados na água, escreve o Science Daily (http://www.sciencedaily.com/releases/2014/12/141222111559.htm).
O gás que está a escapar através do fundo oceânico e das crateras não é nada comparado com a quantidade de metano que está apreendida sob o solo gelado, que está a derreter a um ritmo nunca antes visto, devido ao aquecimento global.
O metano é um dos principais gases com efeito estufa responsável pelo aquecimento do planeta, emitido principalmente pelo gado doméstico, regiões pantanosas e fugas de gás natural dos gasodutos. O seu impacto é 20 vezes superior ao do dióxido de carbono.
Noticia:
http://greensavers.sapo.pt/2014/12/30/siberia-degelo-rapido-do-permafrost-esta-a-provocar-fugas-de-metano-toxico/
A new (computer) chess champion is crowned, and the continued demise of human Grandmasters (http://www.extremetech.com/extreme/196554-a-new-computer-chess-champion-is-crowned-and-the-continued-demise-of-human-grandmasters)
It’s almost 18 years since IBM’s Deep Blue famously beat Garry Kasparov at chess, becoming the first computer to defeat a human world champion. Since then, as you can probably imagine, computers have firmly cemented their lead over puny, fallible meatbags — Garry Kasparov is still considered by many to be the greatest chess player ever, while computers are only getting more and more powerful. Today, following the completion of TCEC Season 7, we have a new computer chess world champion. Called Komodo, the software can reach an Elo rating as high as 3304 — about 450 points higher than Kasparov, or indeed any human brain currently playing chess.In 1996, IBM’s Deep Blue chess computer lost to Garry Kasparov — then the top-rated chess player in the world. In the 1997 rematch, following some software tweaks (and ironically, perhaps thanks to a very fateful software bug), Deep Blue won. Over the next few years, humans and computers traded blows — but eventually, by 2005-2006, computer chess programs were solidly in the lead. Today’s best chess programs can easily beat out the world’s best human chess players, even when they’re run on fairly conventional hardware (a modern multi-core CPU).
The supremacy of machine over man is mostly down to two factors: Moore’s law (http://www.extremetech.com/tag/moores-law) (i.e. computer chips doubling in complexity every two-ish years), and improvements to the underlying software. In computer chess circles (http://rjlipton.wordpress.com/2014/12/28/the-new-chess-world-champion/), Moore’s law is thought to add around 50 Elo rating points every two years — or about 450 points in the 18 years since Kasparov was beaten. Iterative versions of computer chess software can also boost the Elo rating somewhat: The new world champion, Komodo 8, has an Elo rating that’s around 60 points higher than Komodo 7a using the same hardware. It’s also worth noting that most of these chess programs are being run on fairly small computers, usually on 4 CPUs or less — while Deep Blue was a bone fide supercomputer (the 259th fastest computer in 1997, in fact).
Read: Computer learns to play Civilization by reading the instruction manual (http://www.extremetech.com/extreme/90046-computer-learns-to-play-civilization-by-reading-the-instruction-manual)
http://www.extremetech.com/wp-content/uploads/2014/12/top-computer-chess-programs.jpg (http://www.extremetech.com/wp-content/uploads/2014/12/top-computer-chess-programs.jpg)Current top computer chess programs, according to CCRL (December 2014). These ranks were confirmed by season 7 of TCEC.
Anyway, as computers began to clearly outstrip human chess players, there was little point in continuing to pitch them against each other. As a result, there are now computer-only chess leagues, where the top chess programs play against each other, for all eternity — or at least until the guy running the league turns his computer off, anyway. The CCRL (http://www.computerchess.org.uk/ccrl/4040/index.html) is probably the most detailed/involved of such leagues, but there’s also the IPON (http://www.inwoba.de/index.html) and CEGT (http://www.husvankempen.de/nunn/)too. As far crowning some kind of winner, however, the Thoresen Chess Engines Competition (http://tcec.chessdom.com/) (TCEC) is regarded by some as the de facto computer chess championship.
http://www.extremetech.com/wp-content/uploads/2013/12/IMG_0974-seb-ibm-watson-server-room-1500px-300x200.jpg (http://www.extremetech.com/wp-content/uploads/2013/12/IMG_0974-seb-ibm-watson-server-room-1500px.jpg)IBM Watson, shown here with a hairy British person captured within, is a spiritual successor of Deep Blue.
Season 7 of the TCEC concluded a couple of days ago, with Komodo 8 (http://komodochess.com/) just managing to beat the reigning champion, Stockfish 5. You can actually watch the whole season via the TCEC web UI (http://tcec.chessdom.com/archive.php) if you like — or any of the previous seasons, for that matter. Komodo’s rise to the top of the charts is most likely due to chess Grandmaster Larry Kaufma joining the development team. Kaufman is very good at evaluation — the value of a particular position of chess pieces — rather than depth (thinking dozens of moves ahead). Likewise, Komodo relies more on evaluation than depth, which results in it playing an interesting, highly positional style. Seemingly, given Komodo’s universal ranking as the top chess program, this evaluative technique seems to be working out quite well.
I’ll leave you with a fun, human-computer chess-related anecdote. In the first game of the 1997 rematch between Garry Kasparov and Deep Blue, the computer (reportedly) encountered a bug. This bug resulted in Deep Blue performing a fail-safe move — but Kasparov didn’t know about the bug, and he couldn’t work out what Deep Blue was trying to do with the move, and so he mistakenly concluded that the computer was better than him. He won the first game, but was on tilt for the second game due to the bug, resulting in him accusing IBM of cheating and eventually resigning the game — and later, losing the match. If you have 15 minutes to spare, I strongly suggest watching FiveThirtyEight’s short documentary (http://fivethirtyeight.com/features/the-man-vs-the-machine-fivethirtyeight-films-signals/) about the Kasparov-Deep Blue rematch and the software bug that ultimately defeated the world’s greatest chess player.
Falta pouco para sermos obsoletos....:S
EDIT: Vamos exprorar o sol :D
https://www.youtube.com/watch?v=zYBOSFYrCNw
https://i.chzbgr.com/maxW500/3451016448/h9DE3AD8B/
Será que vamos ter aqui mais um Chenobyl?
https://www.youtube.com/watch?v=U_44T0gjSdI
When the doctor’s away, the patient is more likely to survive
(http://arstechnica.com/science/2014/12/when-the-doctors-away-the-patient-is-more-likely-to-survive/)
"Don't get sick on a weekend." That advice is also part of a title of a research paper that evaluates the fates of patients who go through the emergency room on a weekend. These patients are more likely to die. It's just one of a number of studies that suggests patients who enter the hospital while the staffing is lower or the staff more relaxed end up with worse results.
But the precise cause of this enhanced weekend mortality has been hard to determine; is it the reduced staff, a more leisurely approach to care, or some other factor? To try to get at the cause, some researchers obtained records of heart patients who had a critical event during a time when hospitals were at full staff, but heart specialists were likely to be out of town. Unexpectedly, they found that the patients did significantly better when the relevant specialists were unavailable.
The study relied on medicare records to track patients that were admitted to a hospital with a serious heart condition: acute myocardial infarction, heart failure, or cardiac arrest. The key measure was simply whether the patient was still alive 30 days later.
That may sound simple, but the rest of the analysis was remarkably sophisticated. To figure out when heart specialists were most likely to be present at hospitals, they selected two large cardiology meetings: the American Heart Association and the American College of Cardiology, both of which attract over 10,000 participants. Patients admitted during the meetings were compared with groups admitted three weeks before and after. Reasoning that researchers are more likely to attend these meetings, they analyzed teaching hospitals separately from regular ones.
As additional controls, they checked a number of additional meetings for oncology, gastroenterology, and orthopedics specialists. They also looked at the impacts of additional critical injuries, like gastrointestinal bleeding and hip fractures, as well as non-critical cardiac problems.
In total, there were tens of thousands of patients involved. And the trends were clear. At teaching hospitals, the rate of death after heart failure was 24.8 percent on non-meeting days. While the cardiologists were out of town, it dropped to 17 percent. A similar trend was apparent with cardiac arrests, where death rates fell from 68.6 percent to 59 percent while cardiology meetings were happening. There was no significant difference with acute myocardial infarction patients.
So, having specialists in town appeared to make matters worse for patients—the exact opposite of the hypothesis the researchers set out to examine. The various controls suggested the effect was robust, and it persisted after adjusting for other potential influences, like age and sex.
In a press release accompanying the report, one of its authors, Anupam Jena, said "That's a tremendous reduction in mortality, better than most of the medical interventions that exist to treat these conditions." What could possibly be causing it? The authors consider three possibilities. First, there's something involved with the changes in cardiology staffing that occur when specialists go out of town that actually increases care. The second is that there are fewer people having outpatient or same-day procedures, given that doctors wouldn't schedule these when they knew they'd be absent. This would allow the remaining physicians to better focus care on the serious cases.
The final possibility that they consider is that the doctors that remain behind are more cautious about the care they give, avoiding aggressive procedures such as the use of angioplasty or stents to re-open clogged heart vessels. This would be consistent with the lack of effect in acute myocardial infarction patients, where this procedure is used less often.
Although their analysis can't distinguish among these possibilities, it's clear that this effect warrants further attention. Both because it's possible that the long-term survival evens out thanks to more aggressive treatment, and because we might find out that we've been acting a bit too aggressively.
Fiquem longe desses artistas!:]
Jorge-Vieira
31-12-14, 14:05
Mars Rover Has 'Amnesia' With Worn Out NAND Memory
It seems that one of the Mars Rover Opportunity's NAND memory banks has been worn out, giving the rover Amnesia.
Today we have some strange news for you: someone's SSD broke. Don't worry, we're not writing about your neighbor who managed to snap one in half, but rather about NASA's SSD. More specifically, the memory of the Mars Rover Opportunity.
When the Opportunity was deployed, what it had inside wasn't called an SSD – just "non-volatile flash memory" (which is exactly what an SSD is anyway). Now, after a decade of service, the researchers controlling the rover have pinpointed the source of its strange behavior. Namely, some of the NAND memory has gone bust after all these write cycles.http://media.bestofmicro.com/1/P/471805/gallery/KSC-03PD-0786_w_600.jpgImage Source: Wikipedia (http://commons.wikimedia.org/wiki/File:KSC-03PD-0786.jpg)
As you may know, non-volatile NAND memory has a limited number of write cycles that it can endure before it becomes worn out and won't store data properly anymore. Of the seven memory banks on the flash in the Rover, the seventh has issues.
The effect has been that the Mars Rover keeps trying to write data to the bank, but because of the way it's programmed, when it fails to write to it a certain number of times, it reboots. As a result, all the data that the rover had gathered into its RAM memory until that time hasn't been saved, making it a rather large pain to collect data effectively. The NASA staff calls this "amnesia," because the Rover keeps forgetting everything it has just done.
The solution to this problem is simply a software patch that stops the rover from using the seventh memory bank. After that, though, it's just a matter of time before another memory bank goes bad, or something else. Hopefully, NASA has included some kind of wear leveling algorithm with the software.
Noticia:
http://www.tomshardware.com/news/nasa-mars-rover-amnesia,28285.html
Jorge-Vieira
31-12-14, 14:23
Russia to Create a ‘Noah’s Ark’ Database Containing DNA From Every Animal in the World
Made with Flare More Info'> http://cdn.eteknix.com/wp-content/uploads/2014/12/dna.jpg
Russia has awarded a huge national grant to Moscow State University to facilitate the creation of a ‘Noah’s Ark’ containing DNA from every living creature on the Earth, the first database of its kind.
The database should be completed by 2018 and the storage vault is said to cover an area of 430sq/km.
Viktor Sadivinchy, rector of Moscow State University, said in a press release, “I call the project ‘Noah’s Ark.’ It will involve the creation of a depository – a databank for the storing of every living thing on Earth, including not only living, but disappearing and extinct organisms. This is the challenge we have set for ourselves.”
“It will enable us to cryogenically freeze and store various cellular materials, which can then reproduce. It will also contain information systems. Not everything needs to be kept in a petri dish.”
“If it’s realized, this will be a leap in Russian history as the first nation to create an actual Noah’s Ark of sorts.”
The DNA samples will be compiled from a number of existing sources, including the Botanical Garden, the Anthropological Museum, and the Zoological Museum, at a cost of 1 billion rubles (US$194 million).
Noticia:
http://www.eteknix.com/russia-create-noahs-ark-database-containing-dna-every-animal-world/
Jorge-Vieira
01-01-15, 08:54
NASA creates ape-like robot for enhanced disaster response
he NASA Jet Propulsion Laboratory (JPL) recently showed off its RobotSimian, an ape-like robot with four limbs that act as arms and legs. The RobotSimian is able to move across rough terrain, pick up objects, and better interact with its environment.
https://www.youtube.com/watch?v=3HFXO_qx5ZY
Robot developers want to create new robotic designs that can be used following natural disasters and other potentially catastrophic events. The RobotSimian will compete against 18 other robotic finalists in a DARPA Robotics Challenge.
"We included industrial designers in the team in an effort to create a robot that looked professional rather than either threatening or overly cute," said Brett Kennedy, JPL Robotic Vehicles and Manipulators Group supervisor, in a media statement. "Basically, we wanted the perceptual equivalent of a St. Bernard."
http://imagescdn.tweaktown.com/news/4/2/42364_01_nasa-creates-ape-robot-enhanced-disaster-response.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42364_01_nasa-creates-ape-robot-enhanced-disaster-response_full.jpg)
Noticia:
http://www.tweaktown.com/news/42364/nasa-creates-ape-robot-enhanced-disaster-response/index.html
Jorge-Vieira
02-01-15, 07:46
Robots could explore space station because of Wi-Fi access
The Wi-Fi networks aboard the International Space Station (ISS) could allow robots to autonomously roam the orbiting research lab. The SPHERES robots have been aboard the ISS since 2006, mainly used in a small cube location that is marked by ultrasound beacon limiters.
http://imagescdn.tweaktown.com/news/4/2/42382_01_robots-explore-space-station-wi-fi-access.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42382_01_robots-explore-space-station-wi-fi-access_full.jpg)
This would be a unique opportunity to determine if robots would be able to carry out menial tasks board the ISS, so astronauts are able to handle more pressing activities. Operators from the NASA Ames Research Center want to discover if it'd be possible to direct SPHERES using the current ISS Wi-Fi infrastructure.
NASA and other participating space nations have shown increased interest in using robotics technology aboard the ISS - hoping to make the environmental safer to work in, while also helping astronauts with their workloads.
Noticia:
http://www.tweaktown.com/news/42382/robots-explore-space-station-wi-fi-access/index.html
Jorge-Vieira
02-01-15, 07:47
New NASA scientific balloon fails after only a short period
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<article id="main-content"><header>New NASA scientific balloon fails after only a short periodNASA's COSI balloon project plummets out of the sky almost immediately, falling short of their 100-day planned adventure
By: Chris Smith (http://www.tweaktown.com/author/Chris-Smith/index.html) | Business, Politics & Money News (http://www.tweaktown.com/business-politics-and-money/index.html) | Posted: 47 mins ago
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</header><article><center style="clear:both;margin:30px 0"></center>The freshly designed balloon, said to carry a telescope that detects gamma rays unseen by human eyes, was set off with the task of floating over Antarctica for 100 days - marking it as NASA's longest scientific balloon mission ever.
http://imagescdn.tweaktown.com/news/4/2/42390_054_new-nasa-scientific-balloon-fails-two-days.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42390_054_new-nasa-scientific-balloon-fails-two-days_full.jpg)
Er, Houston - We have a problem. After only two days of soaring through the sky, the balloon has sprung a leak (https://cosi2014.wordpress.com/) and plunged back to earth. As according to the COSI '14 Balloon Campaign and Shenanigans (https://cosi2014.wordpress.com/) website: "I'm saddened to report that the COSI/SPB balloon flight was terminated much earlier than expected. The balloon developed a leak after the first day at float and we decided to increase the chances of instrument recovery this season instead of continuing operations for as long as the balloon maintained altitude."
Currently sitting at 350 miles from McMurdo at an elevation of 8000 ft, this unfortunate situation has seen a daring mission end extremely early. The previous balloon flight mission record sits at 55 days total, with this ambitious mission looking to almost-double this number. Judging by the wrap-up on this website, there are no repair and re-launch plans currently made - it seems like a completely dead project.
This is another installment in a very unlucky series of events for the scientists working on COSI. Originally planned for launch last year, the government shutdown meant the whole 2013-2014 Antarctica research season was put to a halt and back in 2010, their predecessor to the COSI crash landed in the Australian outback.
Here's hoping they can get back on their feet and produce another similar project in the near future. If you want to read more about the project, planning and implementation, you can do so via this website (https://cosi2014.wordpress.com/).
</article></article>
Noticia:
http://www.tweaktown.com/news/42390/new-nasa-scientific-balloon-fails-short-period/index.html
https://www.youtube.com/watch?v=P5-hn1168jk
Tanta coisa boa para 2015
Jorge-Vieira
03-01-15, 16:59
Votação TeK: Missão da sonda Rosetta foi o maior sucesso tecnológico de 2014
Num mundo cada vez mais dominado pela eletrónica de consumo, foi preciso uma missão de proporções épicas para acalorar o segmento das novas tecnologias. Perseguir um cometa durante 10 anos foi bom, mas pousar uma sonda foi ainda melhor.
Já estamos num novo ano, mas ainda há tempo para fazer algumas retroespetivas sobre o que se passou de relevante em 2014. Tendo o ano dito "adeus" há poucos dias, para muitos leitores alguns dos maiores momentos estão ainda bem frescos na memória.
Noticia completa:
http://tek.sapo.pt/opiniao/votacao_tek_missao_da_sonda_rosetta_foi_o_mai_1426 209.html
O caça mais caro do mundo e nem o conseguem pôr a trabalhar como é preciso por causa de software. :facepalm:
https://www.youtube.com/watch?v=V8uUyHU2rFM
O caça mais caro do mundo e nem o conseguem pôr a trabalhar como é preciso por causa de software. :facepalm:
http://s2.quickmeme.com/img/f9/f9d031e5ece3cef14379307bdb0293e61225f697833f4223c0 93a18c6a0d066a.jpg
Boas!
Qual é?
O F22 ? O Euro-Fighter já é uma realidade?
Cumprimentos,
LPC
Jorge-Vieira
03-01-15, 17:31
O caça mais caro do mundo e nem o conseguem pôr a trabalhar como é preciso por causa de software. :facepalm:
http://i61.tinypic.com/2zztikw.gif
Desculpem lá. Não copiei o link do video e saiu borrada.
Já está corrigido. O caça é o F35.
Devem estar a usar a versão technical preview. lol
Jorge-Vieira
04-01-15, 16:13
Explore the galaxy through this free NASA app
If you're looking for an excuse to bludge your way through the new working year, you just cannot wait until the launch of the new Star Wars film or you're a big space fanatic - NASA has just released their new "NASA's Eyes (http://eyes.nasa.gov/exoplanets/download.html)" application - created by NASA themselves, allowing users to explore the galaxy and view information collected by Kepler, Hubble and Spitzer.
http://imagescdn.tweaktown.com/news/4/2/42437_07_explore-galaxy-through-free-nasa-app.png (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42437_07_explore-galaxy-through-free-nasa-app_full.png)
If download sizes are a concern, the whole package (http://eyes.nasa.gov/exoplanets/download.html) amounts only to 28.5mb, also including self-updating capabilities the ensure you're always kept up-to-date with the latest findings and information.
NASA also provide a bunch of video tutorials (http://eyes.nasa.gov/exoplanets/tutorials.html) to get you going, alongside a handy "demo" mode - which sets out to rescue any idle PC by zooming between Earth, satellites, telescopes and the Kepler stars.
You can't skip the introduction for this Windows game, however it only lasts 20 seconds in total.
Noticia:
http://www.tweaktown.com/news/42437/explore-galaxy-through-free-nasa-app/index.html
O nosso sol tem um irmão.
http://www.youtube.com/watch?v=IaWg2ACMspk
Jorge-Vieira
06-01-15, 20:08
Será que eles se conhecem :D
Conheciam-se, mas 4 mil milhões de anos depois e podem-se se ter esquecido de mandar uns postais ou telefonar.
Jorge-Vieira
06-01-15, 20:18
É pena já não haver o ponto de encontro na tv, promovia-se um reencontro de irmãos :)
Jorge-Vieira
07-01-15, 09:51
NASA discovers best Earth-like planet yet (http://www.kitguru.net/channel/science/jon-martindale/nasa-discovers-best-earth-like-planet-yet/)
Chances are we’re going to colonise inhospitable environments in our own solar system long before we look to do so anywhere else, but that doesn’t mean we can’t dream of landing craft on worlds where much more acceptable gravity and temperatures won’t make it such a pain to get up in the morning. In an announcement that included the 1,000th planet discovered by the Kepler space telescope, NASA also stated that it had found the most Earth-like planet yet, making it currently, our best hope for a secondary home world or one inhabited by life as we know it.
The planet in question has been called Kepler-438b, and while 12 per cent larger than Earth and potentially as much as 40 per cent warmer, it orbits the habitable zone of a red-dwarf star and is thought likely to be rocky too, so there is the potential for life there. The key word there is potential, as at this point we have no idea what the planet is made up of. It will remain hard to fact check that too, as it’s 475 light years away, meaning that we won’t be checking it out in first person any time soon.
http://www.kitguru.net/wp-content/uploads/2015/01/kepler.jpg (http://www.kitguru.net/wp-content/uploads/2015/01/kepler.jpg)
In terms of other comparisons with our own home world, Kepler-438b sees in the new year a lot more often than we do, as it orbits its host star every 35.2 days. Its big similarity however, is that it exists in what’s called the circumstellar habitable zone or Goldilocks zone (http://en.wikipedia.org/wiki/Circumstellar_habitable_zone), which essentially means that the exoplanet (a planet that does not orbit our sun) is far enough from its star that it is able to hold water without it evaporating, but isn’t so far that it’s permanently frozen.
However, while 438b and its potentially habitable cousin, the 1,100 light year distant Kepler-442b, may be within this habitable zone, they may not be entirely Earth like.
“From the Kepler measurements and the other measurements we made, we don’t know if these planets have oceans with fish and continents with trees,” said Dr Caldwell of the SETI program to BBC News (http://www.bbc.co.uk/news/science-environment-30705517).
In reality, what we’re able to take into account through measuring a star’s light output as a planet passes between us and the stellar body, is how big the planet may be and what its potential composition is. In the case of these two worlds, chances are they’re rocky due to the amount of light blocked by their passing. Whether they’re truly rocky though or whether they have liquid oceans, is something that our current technology doesn’t allow us to test for.
Noticia:
http://www.kitguru.net/channel/science/jon-martindale/nasa-discovers-best-earth-like-planet-yet/
http://www.youtube.com/watch?v=CONe3iW-xww
Jorge-Vieira
09-01-15, 15:39
If NASA was a travel agency… (http://www.kitguru.net/channel/science/jon-martindale/if-nasa-was-a-travel-agency/)
Even though the private industry looks set to overtake NASA in the race to dominate the endless blackness outside of our own little world, here’s hoping that the space agency and its international counterparts continue to push the boundaries of what’s possible, rather than resorting to more commercial ventures. Still, if it did, chances are it wouldn’t do a half bad job at it – at least in terms of marketing.
NASA’s Jet Propulsion Laboratory has produced a series of stylistic posters, promoting travelling to new worlds. The first one, released back in mid-December is for a relaxing trip to Kepler-16b, which is a gas giant similar to Saturn, that’s made up of as much gas as it is rock and ice. Thanks to its twin stars, it would give you a double shadow too, wherever you went.
http://www.kitguru.net/wp-content/uploads/2015/01/poster03.jpg (http://www.kitguru.net/wp-content/uploads/2015/01/poster03.jpg)
If that doesn’t strike your fancy though, perhaps you’d like to head to super earth, HD 40307g, which at only 42 light years away is pretty close in terms of galactic and universal distances. While we don’t really know if you’d have much of a surface to stand on – it’s not clear whether it’s made up of thick layers of gas and ice, or rock – it would make for a great planet for training athletes, thanks to its high gravity.
http://www.kitguru.net/wp-content/uploads/2015/01/poster02.jpg (http://www.kitguru.net/wp-content/uploads/2015/01/poster02.jpg)
Finally, the latest suggestion from NASA’s intergalactic travel service will take you far further from Earth, all the way to the orbit of star Kepler 186. On planet, Kepler-186f, you’ll likely find flora with a distinctive red hue, thanks to its proximity to its dwarf star host.
http://www.kitguru.net/wp-content/uploads/2015/01/poster01.jpg (http://www.kitguru.net/wp-content/uploads/2015/01/poster01.jpg)
Despite Kepler-186f’s distance from us however (500 light years) it is probably one of the more habitable planets out there for human life, since it rests within the Goldilocks zone (http://en.wikipedia.org/wiki/Circumstellar_habitable_zone) and was the first to be discovered as such last year.
Noticia:
http://www.kitguru.net/channel/science/jon-martindale/if-nasa-was-a-travel-agency/
A NASA parece uma agência de viagens :D
Onde é que marco bilhetes?
Jorge-Vieira
09-01-15, 16:54
Ainda não estão disponíveis :D
https://www.youtube.com/watch?v=KWSojY6ELnA
Jorge-Vieira
10-01-15, 11:35
Computer Scientists Create ‘Unbeatable’ Poker Algorithm
http://cdn.eteknix.com/wp-content/uploads/2015/01/poker.jpg
A team of researchers has created the perfect poker player, in the form of a computer algorithm. Scientist Michael Bowling, with his colleagues at the University of Alberta in Edmonton, Canada, and Finnish software developer Oskari Tammelin, created the Cepheus Poker Project to develop a system to solve heads up fixed-limit Texas Hold’em, a variation on poker. They succeeded, creating a virtual player that boasts a perfect game, including the ability to bluff.
Bowling claims that bluffing is pure maths, a part of game theory, contrary to the common belief that it is instinctive, saying, “Bluffing falls out of the mathematics of the game.”
Although the Cepheus program is not guaranteed to win every single hand, the algorithm invariably wins the game in the long run.
Eric Jackson, a computer-poker researcher in Menlo Park, California, said, “The strategy the authors have computed is so close to perfect as to render pointless further work on this game. I think that it will come as a surprise to experts that a game this big has been solved this soon.”
The algorithm is available online (http://poker.srv.ualberta.ca/) to any poker ace that wants to test it.
Noticia:
http://www.eteknix.com/computer-scientists-create-unbeatable-poker-algorithm/
Jorge-Vieira
10-01-15, 11:36
Meet Elio – The £4,500 Car With Three Wheels
http://cdn.eteknix.com/wp-content/uploads/2015/01/Screen-Shot-2015-01-09-at-18.38.29-e1420828739406.jpg
Many have attempted to produce low-cost and efficient forms of personal transport. We’ve seen innovative vehicles like Renault’s Twizy and more personal solutions like the Segway. One new American company believes it has the solution at this year’s CES.
The Elio is a new car-type vehicle, that has three wheels and a very small engine. It is a car though, one safe for road use and one that does 84 miles per gallon.
Yes, gallon. Of fuel. This vehicle is not electric, as many of these things are. It seems that the desginers of the Elio have simply aimed for low cost of manufacture rather than cost of fuel, however it looks like that they’ve attempted to offset that by utilising such a small engine and weight of the overall vehicle.
The car is sort of in production, but there’s a waiting list, with distinctions between refundable and non-refunable deposits towards the car. Those who place a non-refundable deposit get place higher on the waiting list, but with a risk of course.
Noticia:
http://www.eteknix.com/meet-elio-4500-car-three-wheels/
Jorge-Vieira
10-01-15, 14:20
Hubble takes photo stitching to new heights (http://www.kitguru.net/channel/science/andrzej/hubble-takes-photo-stitching-to-new-heights/)
Anyone who has used a digital camera and some editing software, will have tried to create a panorama by combining two or more photos together. It’s a technique that can be easily accomplished – with a product like Photoshop – for half a dozen photos or so. The folks at NASA have been a little more ambitious. KitGuru stitches the facts together.
http://www.kitguru.net/wp-post-thumbnail/mn70Vw.jpg
Launched into low Earth orbit back in 1990, Hubble has been pointing its 2.4 metre mirror at astronomic bodies for 25 years – and it continues to amaze. Especially when you consider that its main lens was faulty and could not function properly until the 11,000Kg telescope had been orbiting the Earth for 3 years.
There was a chance that the programme would be canned around 2009, but one final maintenance mission was launched and there are now hopes that Hubble will continue to capture the universe through to 2020.
That brings us to the Panchromatic Hubble Andromeda Treasury project – which spans many years – and involves the capture and integration of more than 7,300 individual images into a single shot of our nearest galactic neighbour.
The shots themselves were taken from July 2010 through to October 2013 and have, finally, been brought together with fidelity.
The result is a single shot that shows the combined beauty of around 117 million stars. Even so, this ‘three year compilation’ is less than half of everything in the area.
Technically, the images were shot in monochrome, but Hubble is a smart device and can use multiple filters to capture a specific part of the spectrum, from infrared to ultraviolet – which are then combined using special techniques to create false-colour final images.
Hubble collects data on solid state devices that were fitted, in space, between 1997 and 1999 – and the telescope sends around 120GB of data back to Earth each week.
Below is a small version of the final version – click on it to get a 1920 ‘HD’ version or use this link (http://apod.nasa.gov/apod/image/1501/m31PHAT_hubble_10000.jpg) for the full 10,000 pixel version. For more info, you can visit the PHAT mission page here (http://www.astro.washington.edu/groups/phat/Home.html).
http://www.kitguru.net/wp-content/uploads/2015/01/PHAT-Hubble-HD-Shot-KitGuru-300x135.jpg (http://www.kitguru.net/wp-content/uploads/2015/01/PHAT-Hubble-HD-Shot-KitGuru.jpg)
Noticia:
http://www.kitguru.net/channel/science/andrzej/hubble-takes-photo-stitching-to-new-heights/
117 Milhões é obra... Talvez estejamos numa foto também, visto de lá para cá. ^^
Jorge-Vieira
11-01-15, 10:17
NASA, Nissan team up to develop autonomous vehicle research
Car maker Nissan and the NASA space agency have signed a five-year research and develop partnership, which will boost autonomous vehicle research. Nissan has already tested its autonomous vehicles in urban environments, with the car designed to deal with other vehicles, construction, pedestrians, cyclists, and other common scenarios.
http://imagescdn.tweaktown.com/news/4/2/42703_01_nasa-nissan-team-up-develop-autonomous-vehicle-research.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42703_01_nasa-nissan-team-up-develop-autonomous-vehicle-research_full.jpg)
Specifically, there is interest in developing software algorithms, concepts and integrated prototypes of self-driving autonomous vehicles - giving Nissan a much-needed boost in the surging market, while NASA hopes to implement breakthroughs into its space research.
"All of our potential topics of research collaboration with Nissan are areas in which Ames has strongly contributed to major NASA programs," said Pete Worden, director of AMES. "Ames developed Mars rover planning software, robots onboard the International Space Station (ISS) and next-generation air traffic management systems to name a few. We look forward to applying knowledge developed during this partnership toward future space and aeronautics endeavors."
In addition to the autonomous vehicle research, Nissan and NASA will also develop technology geared towards robotics, human-machine interface, software analysis/verification and network-enabled applications.
Noticia:
http://www.tweaktown.com/news/42703/nasa-nissan-team-up-develop-autonomous-vehicle-research/index.html
Jorge-Vieira
11-01-15, 10:34
This Was the First Ever Satellite Image of the Entire U.S. (http://gizmodo.com/this-was-the-first-ever-satellite-image-of-the-entire-u-1678463325)
http://i.kinja-img.com/gawker-media/image/upload/lizpmq46kbpc0kqus8oq.jpg This might look like someone's faxed a page of an atlas a dozen times, but you're actually looking at the state-of-the-art from 1974. This is the first ever satellite image of the entire United States.
It was created for NASA by Department of Agriculture Soil Conservation Service Cartographic Division. The actual hard-copy image measured 10 by 16 feet, and was made up of 595 cloud-free black-and-white images returned from NASA's first Earth Resources Technology Satellite. All the images were taken from 560 miles above the surface of Earth using the red part of the visible light spectrum, between July 25th and October 31st, 1972.
Noticia:
http://gizmodo.com/this-was-the-first-ever-satellite-image-of-the-entire-u-1678463325
Jorge-Vieira
11-01-15, 10:56
SpaceX Successfully Launches Dragon Rocket, Fails to Make Landing
http://cdn.eteknix.com/wp-content/uploads/2015/01/dragon-rocket-800x449.jpg
Elon Musk’s astronautics outfit SpaceX conducted a successful rocket launch on Saturday, but the landing left a little to be desired. The Dragon capsule was launched early on Saturday morning, and the rocket made it into orbit for rendezvous with the International Space Station. However, the return journey – the landing of the Falcon 9 launch vehicle on an out-to-sea barge – was not as successful.
Noticia completa:
http://www.eteknix.com/spacex-successfully-launches-dragon-rocket-fails-make-landing/
Jorge-Vieira
12-01-15, 14:16
AI researchers called upon to sign open letter for safe development
Research into artificial intelligence (AI) continues to evolve, and there is growing concern that uncontrolled AI could have a significant impact on mankind. To prevent this from happening, the Future of Life Institute (FLI) wants AI researchers to sign an open letter to protect humans from intelligent machines.
http://imagescdn.tweaktown.com/news/4/2/42742_01_ai-researchers-called-upon-sign-open-letter-safe-development.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42742_01_ai-researchers-called-upon-sign-open-letter-safe-development_full.jpg)
"We recommend expanded research aimed at ensuring that increasingly capable AI systems are robost and beneficial: our AI systems must do what we want them to do," the letter reads. "The attached research priorities document gives many examples of such research directions that can help maximize the societal benefit of AI. This research is by necessity interdisciplinary, because it involves both society and AI. It ranges from economics, law and philosophy to computer security, formal methods and, of course, various branches of AI itself."
AI is being used in autonomous weapons systems, robots and humanoids, and in autonomous vehicles - raising serious ethical questions that must be answered.
Notable letter signees include Tesla founder Elon Musk, Professor Stephen Hawking, Microsoft research director Eric Horvitz, and numerous other leading professors, engineering students, and private sector leaders.
Noticia:
http://www.tweaktown.com/news/42742/ai-researchers-called-upon-sign-open-letter-safe-development/index.html
Jorge-Vieira
12-01-15, 14:36
Space X sea-barge landing too ‘hard’ (http://www.kitguru.net/channel/science/jon-martindale/space-x-sea-barge-landing-too-hard/)
Commercial space organisation, Space X, attempted a frequently delayed unmanned mission to the International Space Station on Saturday, delivering supplies and important cargo to the orbiting station for the first time in months. While the launch itself went off without a hitch, the big scientific experiment with it was to see whether the first stage of the rocket could be landed safely on a sea-barge to allow for the re-use of certain parts which could bring down costs. Unfortunately, the landing was simply too hard.
http://www.kitguru.net/wp-content/uploads/2015/01/barge1.jpg (http://www.kitguru.net/wp-content/uploads/2015/01/barge1.jpg)
Elon Musk, CEO of SpaceX tweeted shortly after the rocket’s launch, “Rocket made it to drone spaceport ship, but landed hard. Close, but no cigar this time. Bodes well for the future tho.” He went on to state that some of the safety equipment on the unmanned barge would need to be replaced, but that ultimately it wasn’t too much of a failure.
https://www.youtube.com/watch?feature=player_embedded&v=33BZi6JC5ZU
In-fact, while it sounds from his description that the Falcon 9 rocket stage did hit hard enough that little will be reusable, the fact that it was able to accurately target the barge at all is a great achievement. Previous tests have given the rocket stage a margin of error up to 10 kilometres wide, having it hover above the ocean before cutting power and crashing into the water. In this instance, Space X was trying to land the large rocket booster and fuel tank on a platform just 300ft by 100 ft and it sounds like it did that, but just didn’t slow down enough.
All of this was possible because of the unique design of the Falcon 9 booster rocket, which is able to reignite its engines after stage separation – after sending the payload and its smaller engine(s) and fuel reserve into an orbital trajectory – and uses that power combined with fins to control its descent. It also has landing legs, which is unusual for a first stage booster.
The point of this is to make the rocket as reusable as possible, which can therefore make it much cheaper to operate – since the engines don’t need to be rebuilt for each launch. Whether everyone that wants to hire Space X for trips into a near earth orbit will be happy to use a second-hand rocket, remains to be seen, but that’s a bridge to be crossed when it is actually possible to recover the rocket. No doubt this latest test will just be one of many going forward.
Noticia:
http://www.kitguru.net/channel/science/jon-martindale/space-x-sea-barge-landing-too-hard/
Jorge-Vieira
12-01-15, 15:04
Spinal Cord Implants Could Help Paralysed People to Walk
http://cdn.eteknix.com/wp-content/uploads/2015/01/spinal-cord-implant.jpg
Swiss researchers have developed a flexible implant covered in electrodes that can imitate the electrical impulses of a healthy spinal cord, giving new hope of mobility to sufferers of paralysis.
The e-Dura implant combines platinum and silicon microbeads, cracked gold electronic tracks, and fluidic microchannels that can mimic a functional spinal nervous system, carrying motor signals from the brain to the rest of the body. In lab tests, paralysed rats fitted with an e-Dura implant were able to walk again within two weeks.
https://www.youtube.com/watch?feature=player_embedded&v=dfDatjPZjJU
Though it will be a while until the e-Dura is tested on humans, the developers hope that it will be able to tackle a multitude of spinal cord-related conditions, including epilepsy and Parkinson’s disease, plus reduce chronic pain.
Noticia:
http://www.eteknix.com/spinal-cord-implants-help-paralysed-people-walk/
Um excelente video para entendermos o que é Quantum Entanglement
https://www.youtube.com/watch?v=ZuvK-od647c
Um excelente video para entendermos o que é Quantum Entanglement
https://www.youtube.com/watch?v=ZuvK-od647c
Boas!
Excelente explicação...
O quantum entanglement é algo de misterioso e fascinante...
Infelizmente é como é dito no filme, não permite comunicação mais rápido que a velocidade da luz, devido ao facto de não se saber qual é a particula no ponto do espaço que fica com a rotação invertida em relação á particula a ser vista... logo é ordem dentro do caos... Não se sabe apenas se pode calcular como possível...
Cumprimentos,
LPC
Um reactor nuclear natural, com 2 mil milhões de anos :O
https://www.youtube.com/watch?v=yS53AA_WaUk
Um reactor nuclear natural, com 2 mil milhões de anos :O
https://www.youtube.com/watch?v=yS53AA_WaUk
Boas!
Incrível! E como o sistema de sustentação da água permitiu que a reacção acontecesse... por milhares e milhares de ano!
:|
Cumprimentos,
LPC
Spacetime curvature measured using a vanishing star (http://www.extremetech.com/extreme/197210-spacetime-curvature-measured-using-a-vanishing-star)
As an astronomer, you don’t often get to choose what information comes to you. When astronomers notice an event ongoing, they don’t have infinite time to prepare to capture it — they simply have as long as they have. And so, there is a highly conservative culture in astronomy, one based around wringing every drop of meaning from what little data happens to fall on the Earth. Now, astronomers have used the fluctuations in a binary star system to measure the mass of the system, and a good thing, too; the wobbly star in question has now wobbled completely out of view, and we’ll have to wait at least another 150 years before we can see it again. The already-incredible binary pulsar J1906 now also has the distinction of housing a nearly invisible neutron star.The system in question (http://news.ubc.ca/2015/01/12/bent-time-tips-pulsar-out-of-view/) is called a binary pulsar, a two-star system with at least one regularly spinning neutron star — known as a pulsar. Pulsars are uniquely useful for astronomers since they project intense beams of radiation out in just a single direction as they spin, leading to their branding as cosmic lighthouses. We can only see this beam when it’s pointed directly at Earth, and so pulsars create an, uh, pulsing series of radiation bursts that astronomers can use to accurately time events at a distance.
In the case of J1906, we have two neutron stars orbiting one another, and though each star is more massive than our own Sun, they are separated by just a fraction of the Earth-Sun distance. The gravitational interactions between these two closely orbiting giants can cause huge disturbances in the patterns of pulsar radiation.
<iframe src="http://www.youtube.com/embed/IgihQG8t0kI" frameborder="0" allowfullscreen="allowfullscreen"></iframe>
The principle at work here is called precession, and it’s actually pretty relevant to a wide area of science. It’s the idea behind the reaction wheels that stabilize satellites (or, in Kepler’s case, don’t stabilize anything (http://www.extremetech.com/extreme/171761-nasa-resurrects-planet-hunting-kepler-replaces-broken-parts-with-magical-sun-power)), and it explains a lot about the axial movements of planets. In this case, precession is how we understand the wobbly movement of one of J1906’s two neutron stars, as the axis of rotation is pulled slowly off-kilter by the force of gravity — also known as the curvature of spacetime. The distance between regular pulsar rotation and this wobbly stellar dance can be calculated, and this in turn reveals the weight of the stars — the extent of spacetime curvature in the system.
http://www.extremetech.com/wp-content/uploads/2015/01/pulsar-2-300x225.jpg (http://www.extremetech.com/wp-content/uploads/2015/01/pulsar-2.jpg)The wobbly pulsar is actually quite wobbly, and shortly after researchers measured its drunken path, it disappeared. The wobble has actually become so extreme that the pulsar can now complete a full rotation without its so-called lighthouse beam ever shining onto the Earth. This makes it functionally invisible to even the most powerful modern telescopes. Note that a large portion of pulsars in the galaxy have always been in this state, spinning invisibly with a beam that has never fallen on Earth even once. In J1906 we’ll be a bit luckier, and it may wobble back into view in the 2170’s or so.
Spacetime curvature is generally represented by a downward funnel poked into a 2-dimensional sheet, the weight of ball bearings on a trampoline. However, this study shows the inaccuracy inherent in such a visual metaphor, as the wobbling in our neutron star is the result of frictionless movement through a gravitational field. Because pulsars have such reliable rotation and directionality, they can reveal not just the timing of events but the axis of rotation over time. They’ve allowed collection of some of the most important pieces of evidence in the history of science, and they will undoubtedly continue in the future.
Jorge-Vieira
13-01-15, 14:17
NASA drops robot into volcano to help study fissure
The NASA Jet Propulsion Laboratory (JPL) has started testing its VolcanoBot 1 robot in Hawaii, sending it into inactive fissures located inside the active Kilauea volcano. The small two-wheeled robot is less than seven inches tall and around one foot long, with the ability to help researchers create 3D fissure maps.
http://imagescdn.tweaktown.com/news/4/2/42781_01_nasa-drops-robot-volcano-help-study-fissure.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42781_01_nasa-drops-robot-volcano-help-study-fissure_full.jpg)
"We don't know exactly how volcanoes erupt. We have models but they are all very, very simplified. This project aims to help make those models more realistic," said Carolyn Parcheta, JPL postdoctoral fellow.
NASA hopes to refine the VolcanoBot 1's abilities, which could be rolled out for future missions on planets and moons besides Earth. There is specific interest in exploring craters on the moon and Mars, with Earth-based experiments helping perfect hardware before sending them into space.
Noticia:
http://www.tweaktown.com/news/42781/nasa-drops-robot-volcano-help-study-fissure/index.html
https://www.youtube.com/watch?v=fhjoL4mMMVU
Jorge-Vieira
14-01-15, 10:10
Duke University creates first contracting human muscle in research lab
Duke University researchers have grown human skeletal muscles in a research lab, with the manufactured creation able to contract and respond like native tissue. It's possible the lab-created muscles can help with drug research and so researchers are better able to study diseases.
https://www.youtube.com/watch?feature=player_embedded&v=EQJ-K7s4LgA
Researchers used human cells that progressed past stem cells but didn't reach full muscle tissue yet - and the myogenic precursors were allowed to form into muscle fibers located in a custom 3D scaffolding.
"One of our goals is to use this method to provide personalized medicine to patients," said Nenad Bursac, associate professor of biomedical engineering at Duke University, in a press statement. "We can take a biopsy from each patient, grow many new muscles to use as test samples and experiment to see which drugs would work best for each person."
image: http://imagescdn.tweaktown.com/news/4/2/42826_01_duke-university-creates-first-contracting-human-muscle-research-lab.jpg
http://imagescdn.tweaktown.com/news/4/2/42826_01_duke-university-creates-first-contracting-human-muscle-research-lab.jpg
Noticia:
http://www.tweaktown.com/news/42826/duke-university-creates-first-contracting-human-muscle-research-lab/index.html
25 anos de Hubble :D
https://www.youtube.com/watch?v=tkIdzyG0OJw
Introdução à astronomia
https://www.youtube.com/watch?v=0rHUDWjR5gg
25 anos de Hubble :D
https://www.youtube.com/watch?v=tkIdzyG0OJw
Boas!
Para mim uma das melhores ferramentas de astronomia de sempre!!
Impressionante como passados 25 ainda nos consegue fascinar!
Espero que o James Webb esteja á altura deste grande feito!
Ainda fico pasmado com as fotos do deep field 1 e o ultra deep field!
Fantasticas mesmo... cada ponto = uma galáxia! :| :| :| :|
Cumprimentos,
LPC
Jorge-Vieira
16-01-15, 14:03
Elon Musk ponies up $10M to help prevent robots from slaughtering us
Artificial intelligence is developing at a rapid rate, and Elon Musk wants to make sure robots don't one day try to overtake mankind. The donated funds will be used to help support AI research activities, especially projects with a focus on non-threatening AI development.
image: http://imagescdn.tweaktown.com/news/4/2/42862_01_elon-musk-ponies-up-10m-help-prevent-robots-slaughtering.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42862_01_elon-musk-ponies-up-10m-help-prevent-robots-slaughtering_full.jpg)
http://imagescdn.tweaktown.com/news/4/2/42862_01_elon-musk-ponies-up-10m-help-prevent-robots-slaughtering.jpg
"Here are all these leading AI researchers saying that AI safety is important," Musk recently said regarding AI. "I agree with them, so I'm today committing $10M to support research aimed at keeping AI beneficial for humanity."
Physicist Stephen Hawking joined Musk and signed an open letter that pledged AI would be developed in a productive, safe manner for humans. The Future of Life Institute published the open letter, which has generated great interest from tech and science industry leaders.
Noticia:
http://www.tweaktown.com/news/42862/elon-musk-ponies-up-10m-help-prevent-robots-slaughtering/index.html
Jorge-Vieira
16-01-15, 14:59
Virgin Joining Race To Accessible Internet With “Most Satellites Ever”
http://cdn.eteknix.com/wp-content/uploads/2015/01/Screen-Shot-2015-01-15-at-11.13.36-e1421320446277.jpg
Virgin is joining the race to provide internet access everywhere by “creating the world’s largest satellite constellation”. Joining the ranks of Facebook with its internet.org and Google with its Project Loon, Virgin aims to provide high speed internet to “billions”.
Virgin founder Richard Branson said in a blog post (http://www.virgin.com/richard-branson/creating-the-worlds-largest-ever-satellite-constellation) that the company will be utilising “Virgin Galactic (http://www.virgingalactic.c/)’s LauncherOne programme” to make satellite launches cheaper and easier than ever.
“Delighted to share news of an incredibly exciting project that could transform the world: we are creating a new constellation of satellites to make high speed internet and telephony available to billions of people who don’t currently have access.”
Together with Qualcomm, Virgin has formed OneWeb Ltd, a company that will utilise the technology and infrastructure built for Virgin Galactic to get so many satellites into space. They say that the initiative will eventually provide internet access to three billion people who could not access it before.
This project is one of a number of global internet initiatives, like Facebook’s internet.org mobile internet project and Google’s Project Loon, which aims to provide remote internet access via giant weather balloons. Microsoft also pitched in recently with its plan (http://www.eteknix.com/microsoft-wants-tap-unused-tv-spectrum-bring-internet-access-across-india/) to use TV spectrum in India.
Noticia:
http://www.eteknix.com/virgin-joining-race-accessible-internet-satellites-ever/
https://www.youtube.com/watch?v=E1q6EGAPE8A
Jorge-Vieira
17-01-15, 11:23
Crash And Burn! Elon Musk Posts Spectacular Video Of Failed Falcon 9 Rocket Landing
If anyone can make failure look like a magnificent achievement in rocket design, launch, and recovery, then it’s definitely Elon Musk. On Saturday, SpaceX launched a Dragon capsule into space via its Falcon 9 launch vehicle. The Dragon went on to make its fifth successful cargo run to the International Space Station, while the Falcon 9 was scheduled to make history by landing vertically on a 300 ft. by 100 ft. target under power… at sea… in the dark.
http://hothardware.com/ContentImages/NewsItem/32332/content/small_spacexbarge.jpg (http://hothardware.com/gallery/NewsItem/32332?image=big_spacexbarge.jpg)
SpaceX's floating barge, docked just days before the Falcon 9's attempted landing
SpaceX was nearly able to successfully accomplish its mission with Dragon 9, but Musk tweeted Saturday morning:
You have to really appreciate what SpaceX was able to accomplish here. The company’s team of engineers was able to launch a rocket towards space at hypersonic speeds, then control the descent back to Earth by using its grid fins and the rocket’s main engine. It just boggles the mind that SpaceX was able to get anywhere close to its floating barge target, let alone actually touch it. However, what would have been a resounding success was kneecapped by the loss of too much hydraulic fluid, which caused the rocket to tip out of control at a 45-degree angle as it approached the barge and burst into flames.
SpaceX has already tackled the what appears to be 95 percent of what it takes to make a successful landing; it will go that extra 5 percent in a future mission by adding in 50 percent more hydraulic fluid to ensure that the grid fins are able to control the Falcon 9 all the way until touchdown.
With all of this in mind, Musk finally took to Twitter this morning to post a series of four images showing the Falcon 9’s final few seconds of life. It shows the rocket making its final approach before tipping on its side, striking the platform, than bursting into flames. Musk tweeted the images to non other than Id co-founder and legendary game programmer John Carmack, who also just so happens to be a rocket nut.
While the still images were amazing in their own right, Musk one-upped himself this afternoon by releasing the following Vine footage of the spectacular crash and burn:
If SpaceX can make rapidly reusable rockets a possibility — and we have no doubt that the company can — it would cut the cost of launching people and equipment into space by half. And if we can make it cheaper to travel to and from space, the possibilities are endless for human space travel.
Ver o video e mais imagens:
http://hothardware.com/news/crash-and-burn-elon-musk-posts-amazing-video-of-failed-falcon-9-rocket-landing#rIbZg1piwdxUfcgj.99
A ciência e tecnologia a ajudar a descobrir a nossa história.
https://www.youtube.com/watch?v=lV2gHu4Ds5I
The CPU from the original PlayStation is powering a probe to Pluto (http://www.kitguru.net/channel/generaltech/matthew-wilson/the-cpu-from-the-original-playstation-is-powering-a-probe-to-pluto/)
If consoles don’t work out then I suppose Sony could always get in to the Space exploration business as the CPU from the original PlayStation is currently powering a probe to Pluto. The old MIPS R3000 CPU was repurposed by NASA back in 2006 to monitor sensors, power thrusters and transmit data.This isn’t the first time old Sony technology has been used for space research, a few weeks back we learned of a scientist using a network of PlayStation 3 consoles to power research in to black holes. (http://www.kitguru.net/channel/science/matthew-wilson/scientists-are-using-300-ps3-consoles-to-research-black-holes/)
http://www.kitguru.net/wp-content/uploads/2015/01/Screen-Shot-2015-01-17-at-17.22.21.png (http://www.kitguru.net/wp-content/uploads/2015/01/Screen-Shot-2015-01-17-at-17.22.21.png)
Image source: Imgtec blog (http://blog.imgtec.com/mips-processors/mips-goes-to-pluto)
NASA does prefer to use older technology rather than the cutting edge for reliability purposes. The Orion spacecraft which may one day be sent off to Mars is powered by an IBM processor from 2002.
The probe to Pluto is now on its final stretch to its destination following its launch back in 2006. The arrival date is currently projected as the 14th of July this year so it has been quite a long journey.
Jorge-Vieira
18-01-15, 10:30
US Army Research Laboratory working on battery that doesn't corrode
The US Army Research Laboratory is developing a new type of battery for the battlefield, with scientists testing different materials. Ideally, they want to create a battery that corrodes slower - if it all - and the rechargeable batteries have less charge/discharge cycles, while increasing stability during high-voltage scenarios.
image: http://imagescdn.tweaktown.com/news/4/2/42920_01_army-research-laboratory-working-battery-corrode.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42920_01_army-research-laboratory-working-battery-corrode_full.jpg)
http://imagescdn.tweaktown.com/news/4/2/42920_01_army-research-laboratory-working-battery-corrode.jpg
Over the next few months, the ARL team wants to begin evaluations of larger battery cells from commercial manufacturers, so they are able to analyze safety and performance. If approved, the ARL will have created new batteries that are lighter and can last longer during use in tough environments.
"We help to develop new battery materials that are lighter and last longer for the Soldier, so he doesn't have to carry so many batteries," said Cynthia Lundgren, Chief of the Electrochemistry Branch of the Power and Energy Division in the Sensors and Electron Devices Directorate. "If we could raise the voltage of a single cell - energy density is a direct function of the voltage - we could make the battery lighter."
Noticia:
http://www.tweaktown.com/news/42920/army-research-laboratory-working-battery-corrode/index.html
Isso dava muito jeito em termos ambientais.
Jorge-Vieira
19-01-15, 14:46
Lost Beagle 2 Mars Lander Found After 11 Years (http://www.hardocp.com/news/2015/01/18/lost_beagle_2_mars_lander_found_after_11_years/)
Uh, excuse me European Space Agency, but we happened to find this lander on Mars (http://arstechnica.com/science/2015/01/lost-beagle-2-mars-lander-found-11-years-after-launch/) and was wondering if by chance that you had lost one. NASA just happened to be in the neighborhood and spotted something that looked like it didn’t belong there. Maybe if you can describe it…….. http://www.hardocp.com/images/smiley/biggrin.gif
https://www.youtube.com/watch?feature=player_embedded&v=iAKAJR4N6zQ
Noticia:
http://www.hardocp.com/news/2015/01/18/lost_beagle_2_mars_lander_found_after_11_years#.VL 0Yji6VfS4
Jorge-Vieira
19-01-15, 20:15
Deep-fried graphene could be the key to long-lasting batteries
http://www.techspot.com/images2/news/bigimage/2015-01-19-image-4.jpgResearchers at Yonsei University in Seoul, South Korea, have developed (http://www.wired.co.uk/news/archive/2015-01/19/deep-fried-graphene-pom-poms) a new method of treating graphene (http://pubs.acs.org/doi/abs/10.1021/cm5034244) that could lead to smaller and more efficient batteries.
Graphene (http://www.techspot.com/tag/graphene/) is the most conductive material known to man but its thin and flat nature limits its surface area. That’s a problem when it comes to battery power as you want as much surface area as possible. The solution is to somehow create more surface area which is exactly what the South Korean researchers have done.
By using an ultrasonic nozzle, the researchers were able to create microdroplets of graphene oxide. These microdroplets were then dropped into a piping hot (160 C) mixture of organic solvent and reducing agent, much like one would dip chicken into hot oil to create deep-fried chicken.
This process extracts the graphene out from the center of the microdroplets to create three-dimensional graphene pom-poms with a wealth of surface area that’s ripe for battery applications. Early testing shows promise as the graphene pom-poms performed better as electrodes compared to regular sheets of graphene.
It’s worth pointing out that this isn’t the first time someone has come up with a method to create 3D graphene. What’s noteworthy about this technique, however, is the fact that it’s much easier to replicate on a large scale meaning mass production for use in consumer goods would be much more feasible.
While it’ll still be a while before graphene is powering our gadgets and electric cars, this breakthrough certainly puts us one step closer to that reality.
Noticia:http://www.techspot.com/news/59448-deep-fried-graphene-could-key-long-lasting-batteries.html
A maior estrela da galáxia.
https://www.youtube.com/watch?v=L8_RnYjFvt0
Jorge-Vieira
21-01-15, 11:04
Amazon building a 150 megawatt wind farm to power data centres
Amazon Web Services (AWS) has just announced that their cloud provider service will be powered by a wind farm in the future. Looking to produce 150 megawatts total of power, this is part of AWS' bid to move toward fully renewable energy supplies.
image: http://imagescdn.tweaktown.com/news/4/2/42997_02_amazon-building-wind-farm-power-data-centres.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/2/42997_02_amazon-building-wind-farm-power-data-centres_full.jpg)
http://imagescdn.tweaktown.com/news/4/2/42997_02_amazon-building-wind-farm-power-data-centres.jpg
This farm is aiming to generate half a million megawatt hours by January 2016, seeing the 150 megawatt value being reached at a later date.
Named Amazon Web Services Wind Farm (Fowler Ridge), this project is being developed with help from AWS partners Pattern Energy Group. This announcement is further said to be due to Greenpeace attacking Amazon for refusing to provide details on how it planned to make the more to renewable energy. Amazon also claims that cloud computing is more environmentally friendly than traditional options due to sever capacity usage and less power consumption is needed to power their infrastructure.
Apple has been praised for their environmental responsibility repor (https://www.apple.com/environment/)t and information analysis, people are asking that Amazon do something similar.
Noticia:
http://www.tweaktown.com/news/42997/amazon-building-150-megawatt-wind-farm-power-data-centres/index.html
SpaceX secures a billion in funding from Google, Fidelity (http://www.kitguru.net/channel/science/jon-martindale/spacex-secures-a-billion-in-funding-from-google-fidelity/)
Tech giant Google and investment management firm Fidelity, have together invested a billion dollars into Elon Musk’s Space X company, bringing its value to over $10 billion and helping to kick-start the project which Musk himself talked about recently (http://goo.gl/xgSNDY): the plan to build a network of miniature satellites to offer universal, fibre speed internet access.The idea of giving people all over the world access to high-speed internet access via satellite isn’t new, it’s just very expensive. Space travel isn’t cheap but even with contemporary rocket technology and potential Space X’s ability to re-use the first stage of its Falcon 9 rocket (if it can just land the thing (http://www.kitguru.net/channel/science/jon-martindale/space-x-sea-barge-landing-too-hard/)) it is a project expected to cost in excess of $15 billion. While Google’s investment only just scratches the surface of that, it is at least a start.
Part of it is likely to be down to Google founders Sergey Brin and Larry Page’s personal interest in space and their admiration for Musk’s plans to take people to Mars as soon as possible to begin constructing a colony there. It’s thought that Space X will use funding generated from people all over the world subscribing to the satellite network (when launched) that will fund the trip to the red planet and its eventual colonisation.
http://www.kitguru.net/wp-content/uploads/2015/01/spacex.jpg
(http://www.kitguru.net/wp-content/uploads/2015/01/spacex.jpg)Space X has made big strides in recent years, including transporting supplies to the ISS
However, Google isn’t likely to be entirely altruistic in this venture. As NYTimes suggests (http://www.nytimes.com/2015/01/21/technology/google-makes-1-billion-investment-in-spacex.html?_r=0), it may well be looking to hitch a ride on the satellite launch vehicles, or perhaps even acquire itself a bit of space on the satellites themselves, so that it could use them for imaging purposes. While the firm currently offers satellite imagery as part of its Earth and Maps packages, it has to buy these from third parties, rather than producing its own. It wouldn’t be surprising if it wanted to rectify that and saw Space X’s plans as a great opportunity to do so.
Google and Fidelity together now own 10 per cent of Space X, with its investment bringing the value of the firm to $10 billion.
Espero poder fazer turismo espacial antes de morrer. (wm)
Jorge-Vieira
21-01-15, 13:18
Australian Radio Telescope Captures Strange Signals From Space
http://cdn.eteknix.com/wp-content/uploads/2015/01/parkes.jpg
Scientists from Melbourne’s Swinburne University have detected alien radio signals from space in real time. The signals were captured by the Parkes radio telescope in New South Wales, Australia, famously part of the communications network that helped relay the 1969 Apollo 11 moon landing footage for TV broadcast around the world.
Emily Petroff, lead researcher at Swinburne University, was excited by the discovery, saying, “Fast radio bursts only last as long as it takes a human to blink their eye. That is what makes this discovery so exciting.”
“Because we were able to catch the act, as opposed to existing data sets, we were able to reveal that the radiation produced by FRB was more than 20 per cent circularly polarised and this suggests there were strong magnetic fields near the source.”
The waves picked up by the Parkes telescope were circular in shape, meaning the signal was on two planes – signals from Earth are commonly only one plane.
“There are two competing models to explain the phenomenon,” Petroff said.
“One suggests it is caused by the collapse or explosion of a star in other another galaxy, while the other suggests it comes from some sort of energy flaring from a neutron star.”
“However, both of these could be incorrect and it could be something entirely different.”
Noticia:
http://www.eteknix.com/australian-radio-telescope-captures-strange-signals-space/
Eles andam aí... será que vão chegar a tempo de ver a apresentação do Win 10 :D
Se calhar ainda não chegaram cá por estarem a usar Windows.
Jorge-Vieira
21-01-15, 13:22
Oh... malditos BSODs :D
Boas!
Nada disso...
Segundo a teoria do antigo astronauta, eles já estão por cá...
É por isso que a civilização ainda está a usar o Windows... Os aliens têm atrasado o desenvolvimento da sociedade e tecnologia para evitarem que nós descubramos que eles fazem raves parties debaixo do gelo da lua Europa! :)
Cumprimentos,
LPC
A vontade em estabelecer contacto com os aliens...
Os índios também ficaram super entusiasmados quando Colombo desembarcou, depois foi o que se viu... :D
Também estás a ser picuinhas. A colonização da américa do norte só teve 25 milhões de mortos.
Lá porque foi o maior genocídio da humanidade antes da WW2, não quer dizer que foi mau.
Também estás a ser picuinhas. A colonização da américa do norte só teve 25 milhões de mortos.
Lá porque foi o maior genocídio da humanidade antes da WW2, não quer dizer que foi mau.
Desculpa bro na escola só aprendi sobre o holocausto... :S
Também estás a ser picuinhas. A colonização da américa do norte só teve 25 milhões de mortos.
Lá porque foi o maior genocídio da humanidade antes da WW2, não quer dizer que foi mau.
Bem...
Espera-se muitos mais se os aliens que aparecerem nos quiserem escravizar...
Game over man....
Cumprimentos,
LPC
https://www.youtube.com/watch?v=5KEhhW8TOGk
Jorge-Vieira
22-01-15, 10:08
Solar power flexes some muscle - Global plane journey plans released
The Solar Impulse 2 is a solar-powered plane that is set to travel across the globe, using a healthy dose of vitamin D as its only power source. Last year the plans were revealed (http://www.gizmodo.com.au/2014/04/this-plane-will-circle-the-world-using-only-the-power-of-the-sun/) by the team behind this massive project, set to travel the whole distance without refueling.
image: http://imagescdn.tweaktown.com/news/4/3/43035_019_solar-power-flexes-muscle-global-plane-journey-plans-released.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/3/43035_019_solar-power-flexes-muscle-global-plane-journey-plans-released_full.jpg)
http://imagescdn.tweaktown.com/news/4/3/43035_019_solar-power-flexes-muscle-global-plane-journey-plans-released.jpg
The route of travel has now been revealed, set for kick-off in March 2015. Starting in Abu Dhabi, this aircraft will transgress the globe, stopping first in Asia, followed by America, southern Europe and Northern Africa. These pit-stops are described as refueling breaks for the staff and crew on board, not actually for the plane itself.
Coming in at 4850 lbs and with a 236 ft wingspan, this aircraft is a beauty to witness. Powered by 17,000 solar panels which charge a 2072 lb lithium battery, this plane will soar through the sky at an average cruising speed of 88 mph.
In order to keep weight low, the crew will be touching down back on earth to drop off waste and pick up refreshed supplies - set to complete the journey in a total of five months.
image: http://imagescdn.tweaktown.com/news/4/3/43035_020_solar-power-flexes-muscle-global-plane-journey-plans-released.jpg (http://www.tweaktown.com/image.php?image=imagescdn.tweaktown.com/news/4/3/43035_020_solar-power-flexes-muscle-global-plane-journey-plans-released_full.jpg)
http://imagescdn.tweaktown.com/news/4/3/43035_020_solar-power-flexes-muscle-global-plane-journey-plans-released.jpg
Noticia:
http://www.tweaktown.com/news/43035/solar-power-flexes-muscle-global-plane-journey-plans-released/index.html
Jorge-Vieira
22-01-15, 10:50
Creating Super-Hydrophobic Materials With Lasers (http://www.hardocp.com/news/2015/01/21/creating_superhydrophobic_materials_lasers/)
https://www.youtube.com/watch?feature=player_embedded&v=FLegmQ8_dHg&x-yt-ts=1421828030&x-yt-cl=84411374
http://www.hardocp.com/news/2015/01/21/creating_superhydrophobic_materials_lasers#.VMDVzC 6VfS4
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