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Contents contributed and discussions participated by jcunha

jcunha

Silicon Valley celebrates Moore's Law 50 years anniversary - 2 views

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    A bit late, but it is very interesting and instructive to listen to Gordon Moore's words "It almost doubled every year (...) so I said in the next 10 years it's going to continue to double every year, we are going to go from 16 components on a chip to 16 000. Pretty wild extrapolation!". This extrapolation (exponential with only 5 initial points) is now well-known and is one of the things that changed the World, it is pretty amazing how this "wild" futuristic vision came true.
jcunha

Nature podcast - Music and the making of science - 2 views

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    "Is music simply a pleasant accompaniment to thought, or a driving force behind it? This show examines music's influence on the development of modern science and the foundations of acoustics." See also http://www.nature.com/news/strike-a-chord-1.17127
jcunha

Space data representation - 1 views

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    A common data hub that allows the representation and comparison of data from numerous space missions. "The IMPEx portal offers tools for the visualization and analysis of datasets from different space missions. Furthermore, several computational model databases are feeding into the environment." As they say, with its massive 3D-visualization capabilities it offers the possibility of displaying spacecraft trajectories, planetary ephemerides as well as scientific representations of observational and simulation datasets.
jcunha

Maze-solving automatons can repair broken circuits - 1 views

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    Researchers in Bangalore, India together with the Indian Space Research organization come up with an intelligent self-healing algorithm that can locate open-circuits faults and repair them in real-time. They used an insulating silicon oil containing conductive particles. Whenever a fault happens, an electric field develops there, causing the fluid to move in a 'thermodynamic automaton' way repairing the fault. The researchers make clear it could be one advantage for electronics in harsh environments, such as in space satellites.
jcunha

Why are the Dutch so tall - 1 views

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    Following a discussion with Kzrystof, where he came up with gravity anomaly reasons for why Dutch people are so tall. Funny to see this fact gathers scientific attention as well.
jcunha

Metals used in high-tech products face future supply risks - 0 views

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    First peer review study about he criticality of rare-earth metals. It can be read "They found that supply limits for many metals critical in the emerging electronics sector (including gallium and selenium) are the result of supply risks. The environmental implications of mining and processing present the greatest challenges with platinum-group metals, gold, and mercury. For steel alloying elements (including chromium and niobium) and elements used in high-temperature alloys (tungsten and molybdenum), the greatest vulnerabilities are associated with supply restrictions" Questions about estimation apart, this can be a valuable market for asteroid mining.. (ot just more market for Infinium-like companies http://www.technologyreview.com/news/527526/a-cleaner-cheaper-way-to-make-metals/).
jcunha

Wireless 10 kW power transmission - 1 views

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    Mitsubishi Heavy Industries said Friday that it has succeeded in transmitting 10 kW of power through 500 m. An announcement that comes just after JAXA scientists reported one more breakthrough in the quest for Space Solar Power Systems (http://phys.org/news/2015-03-japan-space-scientists-wireless-energy.html). One step closer to Power Generation from Space/
jcunha

Electron spins controlled using sound waves - 0 views

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    Cornell applied physicists have demonstrated an unprecedented method of control over electron spins using extremely high-frequency sound waves - new insights in the study of the spin of the electron. Crazy idea but, no further need for complicated quantum encryption techniques of sound signals?
jcunha

Medical Xpress: Newly discovered hormone mimics the effects of exercise - 0 views

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    "Hormones are molecules that act as the body's signals, triggering various physiological responses. The newly discovered hormone, dubbed "MOTS-c," primarily targets muscle tissue, where it restores insulin sensitivity, counteracting diet-induced and age-dependent insulin resistance." Good news for long distance space travelers?
jcunha

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

shared by jcunha on 26 Feb 15 - No Cached
Paul N and Heha Zant liked it
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    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.
jcunha

Nature Optics: Super vision - 6 views

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    Taking images through opaque, light-scattering layers is a vital capability and essential diagnostic tool in many applications. The research group of Prof. Mosk of U. Twente have started doing experiments shooting optical lasers into opaque materials in 2007, and for surprise of everyone, it turn out the light intensity after the opaque material in their experiments was orders of magnitude bigger than expected. Following these results they succeeded in taking non-invasive sharp pictures of objects hidden behind a screen of opaqueness, the so referred Super Vision in this Nature overview article.
jcunha

Missing link in metal physics explains Earth's magnetic field - 0 views

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    In a work published on Nature (http://www.nature.com/nature/journal/v517/n7536/full/nature14090.html#affil-auth) a new DFT based simulation of convection in Earth's Core iron shows that electron-electron scattering has a similar contribution to electron's thermal vibration. The outcome is that using the old dynamo theory the simulation matches the Earth magnetic field experimental results, solving an 80 years old puzzle.
jcunha

Artifitial Intelligence to predict solar flares - 0 views

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    A team from Stanford showing possibility of solar flare prediction using AI techniques and data from the NASA SDO observatory.
jcunha

Pathological Science - 0 views

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    More in the ethic realm, I once was in a talk by Ivan Schuller (http://ischuller.ucsd.edu/) where he revisited the concept of Langmuir's Pathological Science (http://yclept.ucdavis.edu/course/280/Langmuir.pdf), defined as the act in which "people are tricked into false results ... by subjective effects, wishful thinking or threshold interactions" providing a list of aspects common to fraudulent science. Unfortunately there is no video of this very interesting talk, but the slides are available here: http://ethics.ucsd.edu/seminars/seminars/2006/summaries/Pathological_Science.pdf
jcunha

Cloud cities for Venus exploration - 3 views

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    Our friends from NASA have come out with a plan to the human exploration of Venus in the time that everyone is speaking about Mars.
jcunha

Science magazine breakthrough of the year - 3 views

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    A compilation of the highlights of the year, with Rosetta on the first page. There is a follow-up article about potential breakthroughs for 2015 based on ongoing research very interesting to see as well.
jcunha

Mystery of where Earth's water came from deepens: Comet water is different - 2 views

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    "Over the past few months, the European Space Agency's Rosetta space probe closely examined the type of comet that some scientists theorized could have brought water to our planet 4 billion years ago. It found water, but the wrong kind."
jcunha

Quantum machine learning - 1 views

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    Quantum Computing and Machine Learning in the same sentence. The association started to be put forward by Google and NASA playing with D-WAVE computers. Meanwhile in the academic media, https://journals.aps.org/prx/pdf/10.1103/PhysRevX.4.031002
jcunha

Brain's reaction to virtual reality should prompt further study, suggests new research - 2 views

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    "Neuroscience UCLA neurophysicists have found that space-mapping neurons in the brain react differently to virtual reality than they do to real-world environments. Their findings could be significant for people who use virtual reality for gaming, military, commercial, scientific or other purposes." I wonder if we are doing it wrong with the airplane pilot simulators...
jcunha

First Terahertz Amplifier "Goes to 11" - 2 views

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    Guinness World Record breaking, "first radio amplifier operating at terahertz frequencies could lead to communications systems with much higher data rates, better radar, high-resolution imaging that could penetrate smoke and fog, and better ways of identifying dangerous substances, say the researchers who built it". Built from HEMTs (High Electron Mobility Transistors) made of InP (Indium Phosphide), this is a new milestone on the road to the THz applications.
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