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Luís F. Simões

Lust in space: Russians lose control of gecko sex satellite | Al Jazeera America - 5 views

  • Lizards were sent into orbit as part of study into effects of weightlessness on sexual intercourse
  • On Thursday, the team behind the research confirmed that the vessel was not responding to commands, potentially leaving the reptiles to their out-of-this-world sexual intercourse while video footage continues to beam down to Earth.
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    I still think, the lizards have evolved at an unexpectedly high rate and have now taken over the satellite...
Thijs Versloot

More Steam From Less Energy, Thanks to Creepy Sponge Thing - 2 views

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    A new, sponge-like material developed engineers at MIT can convert water to steam using just 1% of the sunlight required by conventional steam-producing solar generators.
Thijs Versloot

Correction to the speed of light? - 3 views

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    The effect of gravity on virtual electron-positron pairs as they propagate through space could lead to a violation of Einstein's equivalence principle, according to calculations by James Franson at the University of Maryland. While the effect would be too tiny to be measured directly using current experimental techniques, it could explain a puzzling anomaly observed during the famous SN1987 supernova of 1987.
LeopoldS

Open WhisperSystems >> Open WhisperSystems - 0 views

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    encrypted phone calls on android and now also ios devices? here we go, from the programmer of PGP
anonymous

Home - Toronto Deep Learning - 2 views

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    Implementation of the deep learning-based image classifier (online). Try making a picture with your phone and upload it there. Pretty impressive results. EDIT: Okay, it works the best with well exposed simple objects (pen, mug).
anonymous

Robot With Broken Leg Learns To Walk Again In 2 Minutes - The Physics arXiv Blog - Medium - 7 views

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    Robot self-adapts its gait when limbs are damaged.
anonymous

Nasa validates 'impossible' space drive (Wired UK) - 3 views

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    NASA validates the EmDrive (http://emdrive.com/) technology for converting electrical energy into thrust. (from the website: "Thrust is produced by the amplification of the radiation pressure of an electromagnetic wave propagated through a resonant waveguide assembly.")
  • ...3 more comments...
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    I would be very very skeptic on this results and am actually ready to take bets that they are victims of something else than "new physics" ... some measurement error e.g.
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    Assuming that this system is feasible, and taking the results of Chinese team (Thrust of 720 mN http://www.wired.co.uk/news/archive/2013-02/06/emdrive-and-cold-fusion), I wonder whether this would allow for some actual trajectory maneuvers (and to which degree). If so, can we simulate some possible trajectories, e.g. compare the current solutions to this one ? For example, Shawyer (original author) claims that this system would be capable of stabilizing ISS without need for refueling. Other article on the same topic: http://www.theverge.com/2014/8/1/5959637/nasa-cannae-drive-tests-have-promising-results
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    To be exact, the chinese reported 720mN and the americans found ~50microN. The first one I simply do not believe and the second one seems more credible, yet it has to be said that measuring such low thrust levels on a thrust-stand is very difficult and prone to measurement errors. @Krzys, the thrust level of 720mN is within the same range of other electric propulsion systems which are considered - and even used in some cases - for station keeping, also for the ISS actually (for which there are also ideas to use a high power system delivering several Newtons of thrust). Then on the idea, I do not rule out that an interaction between the EM waves and 'vacuum' could be possible, however if this would be true then this surely would be detectable in any particle accelerator as it would produce background events/noise. The energy densities involved and the conversion to thrust via some form of interaction with the vacuum surely could not provide thrusts in the range reported by the chinese, nor the americans. The laws of momentum conservation would still need to apply. Finally, 'quantum vacuum virtual plasma'.. really?
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    I have to join the skeptics on this one ...
annaheffernan

Self-assembly and plasmonics could join forces to boost solar energy - 2 views

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    Bio-inspired assembly of fluorescent molecules boosts the fluorescence output.
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    Nice read! It is actually part of the Ariadna PETE study of one of the teams. You can supervise if you want :)
LeopoldS

Extracting audio from visual information | MIT News Office - 3 views

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    nice video and nice story, no revolution in physics and somehow surprising that not done/tried earlier (maybe just again good MIT public relations work?)
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    CSI writers will have to up the ante now.
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    it was probably already done... by the NSA
annaheffernan

High-gain optical transistors flipped by just one photon - 0 views

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    Two research teams have designed an optical gate that can 'switch off' a stream of photons as well as store them ... good news for optical communications as well as future photon-based quantum information systems.
Athanasia Nikolaou

Media Gallery for summer inspiration - 1 views

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    Bifurcations, patterns and other visualised mathematical problems for zen. Even found an oscillatory chemical reaction "Belousov-Zhabotinsky". Had no idea such a thing existed :-)
Thijs Versloot

The Port - Hackathon at CERN - apply now - 3 views

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    Interdisciplinary teams of handpicked individuals chosen for their field-leading expertise and innovative mind combine humanitarian questions with state of the art science, cutting-edge technology and endless fantasy. Organised by THE Port Association, hosted by CERN (IdeaSquare tbc) and with partners from other non-governmental organisations, a three-day problem solving workshop hackathon will be devoted to humanitarian, social and public interest topics. Interdisciplinary teams of selected participants will work together in the fields of: communication - transport - health - science - learning - work - culture - data
Athanasia Nikolaou

Silk protein and chloroplasts for the synthetic leaf - 2 views

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    Royal College of Art's Innovation Design Engineering course in collaboration with Tufts University silk lab. Not as good as it sounds as it does not fully mimic the photosynthesis equation (spare C, H atoms)
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    Interesting stuff and I guess it does not need to fully mimic photosynthesis in the end. As long as oxygen can be produced from CO2 and water that would be great enough. Though the carbon has to be deposited somewhere (in some form) and I wonder how one could extract this efficiently. Maybe it can even serve some purpose (as the sugars are doing for the plant)
Thijs Versloot

Alternative sleep cycles - 1 views

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    Give the Ubermancycle a try?
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    I was into this some time ago and found a documentary in which they performed an experiment on a guy. Long story short, it didn't work that good. He was semi-lucid all the time and his mental performance dropped. Perhaps it is possible to survive like this for months, but if your goal is to maximize your daily output, you will not gain extra work hours due to being 3/4 conscious most of the time. EDIT: Not related to the documentary I mentioned but some first hand stories: http://www.reddit.com/r/IAmA/comments/co5t9/i_attempted_polyphasic_sleep_for_a_documentary_ama/c0tza1e
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    I also heard about it. At the moment, I am on some sort of bi-phasic sleep and I am not feeling more tired than with the monophasic one (while sleeping effectively less right now).
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    If it exists, there's an xkcd about it: http://xkcd.com/320/ Actually the schedule proposed there is quite useful if you're into this whole Friday / Saturday night thing..
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    I don't see why it wouldn't work if you manage to detach yourself from the cycardian input. As in never ever see sun and daylight :))
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    > As in never ever see sun and daylight :)) Like in the Netherlands you mean?
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    Tri-phasic sleep rhythm works fine.
anonymous

See-Through Vision at UCSB - 5 views

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    Determining the "volume" and position of objects inside buildings using wi-fi signal.
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    Now this is impressive
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    another example of bayesian inversion
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    "The objects on the other side do not even have to move to be detected." Very American way of saying "The objects have to be stationary to be detected"...
anonymous

NIAC 2014 Phase I Selections | NASA - 3 views

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    Some interesting future projects from NASA's IAC. (June 2014) NASA Innovative Advanced Concepts awards: "These proposals have been selected based on the potential of their concepts to transform future aerospace missions, enable new capabilities, or significantly alter and improve current approaches."
Marcus Maertens

Robot folds itself up and walks away : Wyss Institute at Harvard - 4 views

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    Origami bot!
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    It's really cool when it folds up, but then it's such a disappointing walk :) I also fail to see an advantage over regular robots. If you care about saving space during transportation, you could design a robot with that in mind without much sacrifice to it's locomotion capabilities.
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    It's cute but I've seen better from amateurs: https://www.youtube.com/watch?v=zK8OjwMdn5I
Isabelle Dicaire

Experimental space telescopes to be 3D-printed at NASA - Laser Focus World - 0 views

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    From the article: By the end of September 2014, Jason Budinoff, an aerospace engineer at NASA's Goddard Space Flight Center (Greenbelt, MD), is expected to complete the first imaging telescopes ever assembled almost exclusively from 3D-manufactured components. The devices' optics and electronics will be fabricated using conventional methods. "As far as I know, we are the first to attempt to build an entire instrument with 3D printing," says Budinoff. He is building a fully functional 50 mm camera whose outer tube, baffles, and optical mounts are all printed as a single structure. The instrument is appropriately sized for a CubeSat (a small satellite made of individual units each about 100 mm on a side). 
Thijs Versloot

Hypersonic Successor to Legendary SR-71 Blackbird Spy Plane Unveiled - 1 views

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    he new SR-72 will use a turbine-based combined cycle (TBCC) that will employ the turbine engine at lower speeds, and use a scramjet at higher speeds. A scramjet engine is designed to operate at hypersonic velocities by compressing the air through a carefully designed inlet, but needs to be traveling supersonic before it is practical to begin with. So far research projects from NASA, the Air Force and other Pentagon entities have not been able to solve the problem of transitioning from the subsonic flight regime, through hypersonic flight with a single aircraft. Same problem as Reaction Engines is trying to solve, so I am not sure whether they actually cracked it. In any case, nice pictures. Not sure why the exhaust color is purple in color. Its not running on Argon I believe.
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    Weird article. Intermediate thruster stage (Ramjet) is missing. Scramjet has supersonic combustion and a normal turbine delivers subsonic flows. Even with afterburner - the Scramjet inlet would decelerate the flow down to subsonic velocity with "normal" subsonic combustion. The only thing I can imagine is that the Scramjet stage is bi-functional and covers both, subsonic and supersonic combustion. But the article doesn't say anything about it.
Marcus Maertens

hitchBOT | Making my way across Canada, one ride at a time. - 3 views

shared by Marcus Maertens on 09 Aug 14 - No Cached
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    Hitchhiking bot!
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    Only until he encounters his first Polish driver. Will be taken directly to a scrap metal merchant...
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