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Paul N

It's official: NASA announces Mars' atmosphere was stripped away by solar winds - 1 views

www.sciencealert.com/d-to-mars-atmosphere-right-now

shared by Paul N on 06 Nov 15 - No Cached
  • Paul N on 06 Nov 15
     
    We finally have an understanding of how Mars transformed from a once habitable, Earth-like planet, into the dry world we see today. NASA researchers have just announced that Mars' once rich atmosphere was stripped away by solar winds in the early days of the Solar System, causing the planet to dry out.
Alexander Wittig

'Sewing' with molten glass and maths - BBC News - 1 views

www.bbc.com/...science-environment-35171408

math technology

shared by Alexander Wittig on 04 Jan 16 - No Cached
  • Alexander Wittig on 04 Jan 16
     
    From the section Science & Environment US researchers have developed what they call a "molten glass sewing machine" by combining 3D printing of glass with a mathematical model of how a liquid thread forms different types of loop. When the nozzle releasing a stream of molten glass is raised above a certain level, that thread begins to wobble.
Nina Nadine Ridder

Scientists teach bacterium a new trick for artificial photosynthesis - 1 views

phys.org/...artificial-photosynthesis.html

BIO photosynthesis bacteria science

shared by Nina Nadine Ridder on 05 Jan 16 - No Cached
  • Nina Nadine Ridder on 05 Jan 16
     
    Berkeley Lab researchers are using M. thermoacetica to perform photosynthesis - despite being non-photosynthetic - and also to synthesize semiconductor nanoparticles in a hybrid artificial photosynthesis system for converting sunlight into valuable chemical products.
Thijs Versloot

The Worlds Smallest Thermometer - 0 views

www.nature.com/...ncomms9954.html

technology science AFM

shared by Thijs Versloot on 17 Dec 15 - No Cached
jcunha liked it
  • Thijs Versloot on 17 Dec 15
     
    By attaching a diamond crystal to an AFM tip, researcher at New York City University managed to measure the heat flows at atomic levels in resistors. The method works due to a vacancy in the carbon lattice, two spots are empty of which one is filled with a nitrogen atom. The energy state of the vacancy is temperature dependent and can actually be read out spectroscopically.
joergmueller

In a new round of testing, NASA confirms yet again that the 'impossible' EMdrive thrust... - 4 views

finance.yahoo.com/...ts-show-physics-230112770.html

PHY space technology science

shared by joergmueller on 03 Nov 15 - No Cached
  • joergmueller on 03 Nov 15
     
    Engineer Roger Shawyer's controversial EM Drive thruster jets back into relevancy this week, as a team of researchers at NASA's Eagleworks Laboratories recently completed yet another round of testing on the seemingly impossible tech.
  • Alexander Wittig on 04 Nov 15
     
    I like this just because it will end up on Thijs' desk :D
  • jcunha on 04 Nov 15
     
    Interesting that the new comes in... Yahoo Finance :). Another more complete article http://nextbigfuture.com/2015/11/nasa-eagleworks-has-tested-upgraded.html
Luís F. Simões

Nature's special issue on Interdisciplinarity - 2 views

www.nature.com/...interdisciplinarity-1.18295

nature science collaboration

shared by Luís F. Simões on 06 Oct 15 - No Cached
  • Nature’s special issue probes how scientists and social scientists are coming together to solve the grand challenges of energy, food, water, climate and health. This special scrutinizes the data on interdisciplinary work and looks at its history, meaning and funding. A case study and a reappraisal of the Victorian explorer Richard Francis Burton explore the rewards of breaking down boundaries. Meanwhile, a sustainability institute shares its principles for researchers who work across disciplines. Thus inspired, we invite readers to test their polymathy in our lighthearted quiz.
jcunha

Automated Search for new Quantum Experiments - 0 views

arxiv.org/1509.02749

AI learning quantum experiments

shared by jcunha on 23 Feb 16 - No Cached
  • jcunha on 23 Feb 16
     
    "Here we report the development of the computer algorithm Melvin which is able to find new experimental implementations for the creation and manipulation of complex quantum states." Published in Physical Review Letters. Researchers target future use more artificial intelligence algorithms, such as reinforcement learning techniques.
jaihobah

The Nanodevice Aiming to Replace the Field Effect Transistor - 2 views

www.technologyreview.com/...ce-the-field-effect-transistor

transistor PHY technology

shared by jaihobah on 03 Feb 16 - No Cached
LeopoldS liked it
  • LeopoldS on 08 Feb 16
     
    very nice! "For a start, the wires operate well as switches that by some measures compare well to field effect transistors. For example they allow a million times more current to flow when they are on compared with off when operating at a voltage of about 1.5 V. "[A light effect transistor] can replicate the basic switching function of the modern field effect transistor with competitive (and potentially improved) characteristics," say Marmon and co. But they wires also have entirely new capabilities. The device works as an optical amplifier and can also perform basic logic operations by using two or more laser beams rather than one. That's something a single field effect transistor cannot do."
  • ...1 more comment...
  • jcunha on 09 Feb 16
     
    The good thing about using CdSe NW (used here) is that they show a photon-to-current efficiency window around the visible wavelengths, therefore any visible light can in principle be used in this application to switch the transistor on/off. I don't agree with the moto "Nanowires are also simpler than field effect transistors and so they're potentially cheaper and easier to make." Yes, they are simple, yet for applications, fabricating devices with them consistently is very challenging (being the research effort not cheap at all..) and asks for improvements and breakthroughs in the fabrication process.
  • LeopoldS on 09 Feb 16
     
    any idea how the shine the light selectively to such small surfaces?
  • jcunha on 10 Feb 16
     
    "Illumination sources consisted of halogen light, 532.016, 441.6, and 325 nm lasers ported through a Horiba LabRAM HR800 confocal Raman system with an internal 632.8 nm laser. Due to limited probe spacing for electrical measurements, all illumination sources were focused through a 50x long working distance (LWD) objective lens (N.A. = 0.50), except 325 nm, which went through a 10x MPLAN objective lens (N.A. = 0.25)." Laser spot size calculated from optical diffraction formula 1.22*lambda/NA
jcunha

Microsoft research project puts cloud in ocean for the first time - 0 views

phys.org/...-02-microsoft-cloud-ocean.html

technology servers Natick

shared by jcunha on 08 Feb 16 - No Cached
  • jcunha on 08 Feb 16
     
    Microsoft project Natick deploys cloud servers inside a vessel under seawater. A cool story about crossing competences of different people around an innovative solution. "In my experience the trick to innovating is not coming up with something brand new, but connecting things we've never connected before, pairing different technology together."
  • LeopoldS on 09 Feb 16
     
    the quote could come from ACT ...
aborgg

A New Era in Stretchable Electronics - 1 views

futurism.com/rs-and-stretch-like-an-octopus

stretchable electronics robotic skin conductive

shared by aborgg on 10 Mar 16 - No Cached
  • aborgg on 10 Mar 16
     
    Soft Robots Scientists from Cornell University and the Italian Technology Institute in Pontedera have developed an elastic robotic skin that is able to stretch up to five times its size, change colors, and even detect pressure. The luminescent skin, partly funded by the Army and Air Force's research wings, is comprised of different kinds of specialized silicone, making it flexible and soft.
  • aborgg on 10 Mar 16
     
    related video here: http://imgur.com/gallery/q57U40Y
Nina Nadine Ridder

New 'self-healing' gel makes electronics more flexible - 1 views

phys.org/...-gel-electronics-flexible.html

technology self-healing

shared by Nina Nadine Ridder on 25 Nov 15 - No Cached
jcunha liked it
  • Nina Nadine Ridder on 25 Nov 15
     
    Maybe something to look at for Ricarda? Researchers in the Cockrell School of Engineering at The University of Texas at Austin have developed a first-of-its-kind self-healing gel that repairs and connects electronic circuits, creating opportunities to advance the development of flexible electronics, biosensors and batteries as energy storage devices. "There's no need for heat or light to fix the crack or break in a circuit or battery, which is often required by previously developed self-healing materials." Yu and his team created the self-healing gel by combining two gels: a self-assembling metal-ligand gel that provides self-healing properties and a polymer hydrogel that is a conductor.
  • LeopoldS on 10 Dec 15
     
    Ricarda??
jcunha

The Economics of Star Wars: How the Empire collapses - 1 views

www.youtube.com/watch

Economics fun space

shared by jcunha on 08 Dec 15 - No Cached
  • jcunha on 08 Dec 15
     
    Simulating the economic state of the Galaxy after the resistance has blown up the Death Stars. See the paper here: http://arxiv.org/pdf/1511.09054.pdf
  • Thijs Versloot on 10 Dec 15
     
    Love this type of friday afternoon research questions. There is also a now famous scene in the movie Clerks discussing the loss of independent contractors lives as the Death Star was being build.. https://www.youtube.com/watch?v=iQdDRrcAOjA
  • Paul N on 10 Dec 15
     
    That analysis is quite crappy and is easily demolished in the video's comments.
Thijs Versloot

CO2 capture from humid gases - 0 views

www.sciencemag.org/...302.full

technology science climate CO2

shared by Thijs Versloot on 03 Dec 15 - No Cached
LeopoldS liked it
  • Thijs Versloot on 03 Dec 15
     
    Researchers have managed to create a materials that can extract CO2 from a humid environment, which was up to now not possible due to water blocking the absorption. With this hurdle taken, it may be possible to extract CO2 in large quantities from the atmopshere. This would then either be stored or possible even processed with H2 to form carbohydrates. Marsian atmosphere?
Paul N

New derivation of pi links quantum physics and pure math - 5 views

phys.org/...-pi-links-quantum-physics.html

science INF PHY

shared by Paul N on 11 Nov 15 - No Cached
  • Paul N on 11 Nov 15
     
    In 1655 the English mathematician John Wallis published a book in which he derived a formula for pi as the product of an infinite series of ratios. Now researchers from the University of Rochester, in a surprise discovery, have found the same formula in quantum mechanical calculations of the energy levels of a hydrogen atom.
  • Ma Ru on 11 Nov 15
     
    This is insanity, Max. Or maybe it's genius.
jcunha

AI system teachs itself to play 49 classic computer games - 4 views

www.nature.com/...nature14236.html

AI FUN

shared by jcunha on 26 Feb 15 - No Cached
Paul N and Heha Zant liked it
  • jcunha on 26 Feb 15
     
    In this paper published on Nature, AI researchers used deep Q-network with very good adaptability and obtained performances comparable to those of a human games tester.
  • Paul N on 26 Feb 15
     
    Bastards! And that was to be my next idea. Still no recurrency as I see it so far, so this is just some fancy way to do a markov model. Not sure if this is that particular paper or an earlier version but here it is for those interested: http://www.cs.toronto.edu/~vmnih/docs/dqn.pdf
Alexander Wittig

Small, cheap gravity gadget to peer underground - BBC News - 2 views

www.bbc.com/...science-environment-35926147

technology science

shared by Alexander Wittig on 31 Mar 16 - No Cached
LeopoldS and Paul N liked it
  • Alexander Wittig on 31 Mar 16
     
    According to their Nature article, they can detect "a tunnel less than 1m across, buried 2m underground" just from its gravitational difference. Using a device that they predict could cost ~100 € in mass production. UK researchers have built a small device that measures tiny fluctuations in gravity, and could be used to monitor volcanoes or search for oil. Such gravimeters already exist but compared to this postage stamp-sized gadget, they are bulky and pricy.
Marcus Maertens

Zero-shot learning: Using text to accurately ID images - Facebook Code - 1 views

code.fb.com/...zero-shot-learning

AI

shared by Marcus Maertens on 08 Nov 18 - No Cached
  • Marcus Maertens on 08 Nov 18
     
    GANs are striking again...
jaihobah

The New Science of Seeing Around Corners - 3 views

www.quantamagazine.org/seeing-around-corners-20180830

PHY Comp.Sci

shared by jaihobah on 30 Aug 18 - No Cached
Dario Izzo liked it
  • jaihobah on 30 Aug 18
     
    Computer vision researchers have uncovered a world of visual signals hiding in our midst, including subtle motions that betray what's being said and faint images of what's around a corner.
LeopoldS

Supercharged thunderstorm reaches a record 1.3 billion volts : Research Highlights - 2 views

www.nature.com/...d41586-019-00934-z

energy NRG

shared by LeopoldS on 27 Mar 19 - No Cached
  • LeopoldS on 27 Mar 19
     
    Can we use this discharge energy to .... half the cost of access to space? ;-)
mkisantal

Better Language Models and Their Implications - 1 views

blog.openai.com/better-language-models

AI

shared by mkisantal on 15 Feb 19 - No Cached
  • mkisantal on 15 Feb 19
     
    Just read some of the samples of text generated with their neural networks, insane.
  • ...3 more comments...
  • mkisantal on 15 Feb 19
     
    "Pérez and his friends were astonished to see the unicorn herd. These creatures could be seen from the air without having to move too much to see them - they were so close they could touch their horns. While examining these bizarre creatures the scientists discovered that the creatures also spoke some fairly regular English. Pérez stated, "We can see, for example, that they have a common 'language,' something like a dialect or dialectic."
  • Marcus Maertens on 15 Feb 19
     
    Shocking. I assume that this could indeed have severe implications if it gets in the "wrong hands".
  • marliesarnhof on 18 Feb 19
     
    "Feed it the first few paragraphs of a Guardian story about Brexit, and its output is plausible newspaper prose, replete with "quotes" from Jeremy Corbyn, mentions of the Irish border, and answers from the prime minister's spokesman." https://www.youtube.com/watch?time_continue=37&v=XMJ8VxgUzTc "Feed it the opening line of George Orwell's Nineteen Eighty-Four - "It was a bright cold day in April, and the clocks were striking thirteen" - and the system recognises the vaguely futuristic tone and the novelistic style, and continues with: "I was in my car on my way to a new job in Seattle. I put the gas in, put the key in, and then I let it run. I just imagined what the day would be like. A hundred years from now. In 2045, I was a teacher in some school in a poor part of rural China. I started with Chinese history and history of science." (https://www.theguardian.com/technology/2019/feb/14/elon-musk-backed-ai-writes-convincing-news-fiction)
  • marliesarnhof on 18 Feb 19
     
    It's really lucky that it was OpenAI who made that development and Elon Musk is so worried about AI. This way at least they try to assess the whole spectrum of abilities and applications of this model before releasing the full research to the public.
  • mkisantal on 18 Feb 19
     
    They released a smaller model, I got it running on Sandy. It's fairly straight forward: https://github.com/openai/gpt-2
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