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Marcus Maertens

Accidental Discovery Dramatically Improves Electrical Conductivity - - iTech Post - 3 views

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    Oh those bloody physicists... someone forgot to turn off the lights and now they have a 400 times better conductive crystal. If science was always that easy, I would light a candle every day.
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    One of the reason why I like science, those random things that sometimes happen with outcomes you just didn't expect
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    Apparently this was not the first discovery of this effect involving SrTiO3. In an article from 2012 a conductance increase of 5 orders in magnitude is described (http://pubs.acs.org/doi/abs/10.1021/nn203991q). But indeed many large impact discoveries are accidental...
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    I thought we all knew already that science is just another form of directed random search :)))
Jacco Geul

Graphene conducts electricity ten times better than expected - 0 views

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    Grown nanoribbons exhibit better conductivity than theory predicts.
LeopoldS

Operation Socialist: How GCHQ Spies Hacked Belgium's Largest Telco - 4 views

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    interesting story with many juicy details on how they proceed ... (similarly interesting nickname for the "operation" chosen by our british friends) "The spies used the IP addresses they had associated with the engineers as search terms to sift through their surveillance troves, and were quickly able to find what they needed to confirm the employees' identities and target them individually with malware. The confirmation came in the form of Google, Yahoo, and LinkedIn "cookies," tiny unique files that are automatically placed on computers to identify and sometimes track people browsing the Internet, often for advertising purposes. GCHQ maintains a huge repository named MUTANT BROTH that stores billions of these intercepted cookies, which it uses to correlate with IP addresses to determine the identity of a person. GCHQ refers to cookies internally as "target detection identifiers." Top-secret GCHQ documents name three male Belgacom engineers who were identified as targets to attack. The Intercept has confirmed the identities of the men, and contacted each of them prior to the publication of this story; all three declined comment and requested that their identities not be disclosed. GCHQ monitored the browsing habits of the engineers, and geared up to enter the most important and sensitive phase of the secret operation. The agency planned to perform a so-called "Quantum Insert" attack, which involves redirecting people targeted for surveillance to a malicious website that infects their computers with malware at a lightning pace. In this case, the documents indicate that GCHQ set up a malicious page that looked like LinkedIn to trick the Belgacom engineers. (The NSA also uses Quantum Inserts to target people, as The Intercept has previously reported.) A GCHQ document reviewing operations conducted between January and March 2011 noted that the hack on Belgacom was successful, and stated that the agency had obtained access to the company's
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    I knew I wasn't using TOR often enough...
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    Cool! It seems that after all it is best to restrict employees' internet access only to work-critical areas... @Paul TOR works on network level, so it would not help here much as cookies (application level) were exploited.
johannessimon81

Exotic Quantum Effects Could Follow from Compound Now Confirmed to Conduct Only at Surface - 1 views

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    Samarium hexaboride seems to be a topological insulator as a bulk material. It conducts electricity only at its surface, i.e., in a 2D layer (like graphene). This might allow all kinds of exotic (quantum) effects...
johannessimon81

Bacteria grow electric wire in their natural environment - 1 views

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    Bacterial wires explain enigmatic electric currents in the seabed: Each one of these 'cable bacteria' contains a bundle of insulated wires that conduct an electric current from one end to the other. Cable bacteria explain electric currents in the seabed Electricity and seawater are usually a bad mix.
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    WOW!!!! don't want to even imagine what we do to these with the trailing fishing boats that sweep through sea beds with large masses .... "Our experiments showed that the electric connections in the seabed must be solid structures built by bacteria," says PhD student Christian Pfeffer, Aarhus University. He could interrupt the electric currents by pulling a thin wire horizontally through the seafloor. Just as when an excavator cuts our electric cables. In microscopes, scientists found a hitherto unknown type of long, multi-cellular bacteria that was always present when scientists measured the electric currents. "The incredible idea that these bacteria should be electric cables really fell into place when, inside the bacteria, we saw wire-like strings enclosed by a membrane," says Nils Risgaard-Petersen, Aarhus University. Kilometers of living cables The bacterium is one hundred times thinner than a hair and the whole bacterium functions as an electric cable with a number of insulated wires within it. Quite similar to the electric cables we know from our daily lives. "Such unique insulated biological wires seem simple but with incredible complexity at nanoscale," says PhD student Jie Song, Aarhus University, who used nanotools to map the electrical properties of the cable bacteria. In an undisturbed seabed more than tens of thousands kilometers cable bacteria live under a single square meter seabed. The ability to conduct an electric current gives cable bacteria such large benefits that it conquers much of the energy from decomposition processes in the seabed. Unlike all other known forms of life, cable bacteria maintain an efficient combustion down in the oxygen-free part of the seabed. It only requires that one end of the individual reaches the oxygen which the seawater provides to the top millimeters of the seabed. The combustion is a transfer of the electrons of the food to oxygen which the bacterial inner wires manage over centimeter-long distances. However, s
Dario Izzo

Scientists Teach Chimpanzee To Conduct 3-Year Study On Primates | The Onion - America's... - 2 views

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    Viva Mokoko!!
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    Hire her as a stagiaire! In the long run, will the fact that a chimp can do scientist's job affect scientist's pay?
LeopoldS

NRC to Conduct Independent Assessment of NASA Strategic Direction, Management at Parabo... - 0 views

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    New study on NASA strategy - though with strange hybrid mandate to on the one hand take the Obama strategy and then assess how well the strategy fits national goals (which I assume should be also Obama's) .... Leopold
Isabelle Dicaire

Hey, it's weird up here - there must be an earthquake in the atmosphere - GeoSpace - AG... - 4 views

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    CNES research to detect warning signs of earthquakes in the ionosphere. Jaxa is also interested in conducting such studies. To my opinion it's worth taken a closer look at what they are doing!! 
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    Update: it seems we are already looking into it, I found this recent call from ESRIN: IONOSPHERIC SOUNDING FOR IDENTIFICATION OF PRE-SEISMIC ACTIVITY (RE-ISSUE) ESA Open Invitation To Tender AO7548 Open Date: 08/07/2013 Closing Date: 09/09/2013
Nina Nadine Ridder

Going solid-state could make batteries safer and longer-lasting - 3 views

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    If you pry open one of today's ubiquitous high-tech devices-whether a cellphone, a laptop, or an electric car-you'll find that batteries take up most of the space inside. Indeed, the recent evolution of batteries has made it possible to pack ample power in small places.
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    solidstate batteries would be perfect indeed, but up to now I know of no solid electrolyte that can do the trick. The article itself does not mention any material beyond superionic lithium-ion conductors, but does not specify which one in particular. The premis seems to be "if it conducts fast enough, the battery can conduct efficiently"
santecarloni

[1105.1293] Eigengestures for natural human computer interface - 1 views

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    We present the application of Principal Component Analysis for data acquired during the design of a natural gesture interface. We investigate the concept of an eigengesture for motion capture hand gesture data and present the visualisation of principal components obtained in the course of conducted experiments. We also show the influence of dimensionality reduction on reconstructed gesture data quality.
ESA ACT

A charge-driven molecular water pump - 0 views

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    On the basis of molecular dynamics simulations, we propose a design for a molecular water pump. The design uses a combination of charges positioned adjacent to a nanopore and is inspired by the structure of channels in the cellular membrane that conduct w
ESA ACT

Flexible screen based on thermochromic effect: Paperlike thermochromic display - 0 views

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    The authors report the design and implementation of a paperlike, thermally activated display fabricated from thermochromic composite and embedded conductive wiring patterns, shaped from mixture of metallic nanoparticles in polydimethylsioxane using soft l
ESA ACT

Nanotube Phonon Waveguide - 0 views

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    We find that the high thermal conductivity of carbon nanotubes remains intact under severe structural deformations while the corresponding electrical resistance and thermoelectric power show compromised responses. Similar robust thermal transport against
LeopoldS

[1305.3913] Indication of anomalous heat energy production in a reactor device - 5 views

shared by LeopoldS on 23 May 13 - No Cached
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    looks like some backwind for all the cold fusion believers ...
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    Actually Sante and me just reviewed their paper. Although (some of) the scientists in the paper seem to have good track records their experimental techniques are by far not the best to determine the excess amount of energy produced. Even though their methods may introduce fairly large errors they would not be able to negate the cited power output - so they either are super-sloppy (i.e. they lie) or there is TRULY new physics involved... A big problem is that they are basically verifying somebody else's experiment - however because this guy is paranoid he does not tell them exactly what he did. In fact they went to his lab and used a setup that HE put together. All they do is do a measurement on it and it seems like they try to be thorough. There is quite a chance that the guy behind it all (Rossi) is setting them up - personally I would think >95%. However, the implications of this being new physics are so big that I think further research should be conducted.
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    I just answered something very similar to Franco, except the conclusions: I don't think that there is a good reason for us or anybody else in ESA to get involved at this stage.
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    I agree - if this device would work it there would be other interest groups (like the energy sector) with a much more concrete stake in the technology.
johannessimon81

18-year-old massively improves supercapacitors during Intel International Science and E... - 1 views

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    "Her goal was to design and synthesise a super capacitor with increased energy density while maintaining power density and long cycle life. She designed, synthesised and characterised a novel core-shell nanorod electrode with hydrogemated TiO2(H-TiO2) core and polyaniline shell. H-TiO2 acts as the double layer electrostatic core. Good conductivity of H-TiO2 combined with the high pseudo capacitance of polyaniline results in significantly higher overall capacitance and energy density while retaining good power density and cycle life. This new electrode was fabricated into a flexible solid-state device to light an LED to test it in a practical application. Khare then evaluated the structural and electrochemical properties of the new electrode. It demonstrated high capacitance of 203.3 mF/cm2 (238.5 F/g) compared to the next best alternative super capacitor in previous research of 80 F/g, due to the design of the core-shell structure. This resulted in excellent energy density of 20.1 Wh/kg, comparable to batteries, while maintaining a high power density of 20540 W/kg. It also demonstrated a much higher cycle life compared to batteries, with a low 32.5% capacitance loss over 10,000 cycles at a high scan rate of 200 mV/s."
jcunha

New rules for robots backed by European Parliament committee - 1 views

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    The European Parliament's Legal Affairs Committee voted in favour of a resolution calling for new laws addressing robotics and artificial intelligence (AI) to be set out to sit alongside a new voluntary ethical conduct code that would apply to developers and designers.
jcunha

For this metal, electricity flows, but not the heat - 0 views

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    A good electrical conductor is normally a good heat conductor. Vanadium dioxide however seems to not be so, by being a good electrical conductor and a poor thermal conductor. Paper at http://science.sciencemag.org/content/355/6323/371
jcunha

Synthetic Landau levels for photons - 1 views

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    Very nice experiment on the verge of Condensed matter Physics! The presence of Landau levels is a necessary condition to obtain a Quantum Hall state. Quantum Hall states have first appeared in 2D electronic gases when applied a perpendicular magnetic field that induces a new topological state of the "electronic gas". This new topological state is believed to "protect" some parameters of the system, such as conductance making it possible to measure fundamental constants with very high precision even in imperfect experimental conditions. In this fundamental experiment, a synthetic magnetic field was created that acts in continuum photons, producing "an integer quantum Hall system in curved space, a long-standing challenge in condensed matter physics".
Marion Nachon

Complexity Analysis of the Viking Labeled Release Experiments - 6 views

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    The only extraterrestrial life detection experiments ever conducted were the three which were components of the 1976 Viking Mission to Mars. Of these, only the Labeled Release experiment obtained a clearly positive response. [...] These analyses support the interpretation that the Viking LR experiment did detect extant microbial life on Mars.
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    ...unless life arrived together with the nutrients...
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    Viking was one of the best sterilised sc we have ever launched! Just strange to read such an article published in an obscure Korean journal ...
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