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pacome delva

Physics - Small-scale hydraulics - 1 views

physics.aps.org/...PhysRevLett.103.144503

phy nan nanofluidic bio

shared by pacome delva on 07 Oct 09 - Cached
  • Taking a cue from biology, scientists are now designing nanofluidic devices in which molecular interactions at the walls of a narrow channel are engineered to control fluid flow.
pacome delva

You Are Now Free to Move About the Insect - ScienceNOW - 1 views

news.sciencemag.org/...-now-free-to-move-about-t.html

bio flies optic_flow

shared by pacome delva on 24 Aug 10 - Cached
  • Researchers thought that flies chose their altitude based on optic flow, a phenomenon familiar to anyone who has ridden an airplane.
  • The team's observations, published online today in Current Biology, suggest that flies base their cruising altitude on horizontal edges and landmarks—such as table surfaces or tree tops—and not on how fast the ground is moving beneath them. The edge-tracking strategy may enable flies to keep tabs on possible landing spots.
  • This may be the general principle" for all flying insects, he says.
LeopoldS

NASA - NASA IT Summit - 2 views

www.nasa.gov/...index.html

it nasa inf technology conference

shared by LeopoldS on 11 Aug 10 - Cached
  • LeopoldS on 11 Aug 10
     
    who of you IT guru's are going to stay up late to follow some of the presentations live?
  • LeopoldS on 12 Aug 10
     
    nobody interested? Ed? Francesco? Dario?
Nicholas Lan

Letter from Intergovernmental panel on climate change. - 2 views

docs.google.com/fileview

environment climate change

shared by Nicholas Lan on 21 Jul 10 - No Cached
  • Nicholas Lan on 21 Jul 10
     
    To Coordinating Lead Authors, Lead Authors, and Review Editors for the Fifth Assessment Report (AR5) "I would also like to emphasize that enhanced media interest in the work of the IPCC would probably subject you to queries about your work and the IPCC. My sincere advice would be that you keep a distance from the media and should any questions be asked about the Working Group with which you are associated, please direct such media questions to the Co-chairs of your Working Group and for any questions regarding the IPCC to the secretariat of the IPCC." and an amusing related memo on how to deal with reporters if you can't avoid them. I particularly enjoyed the list of words that mean one thing to scientists and something else to other people. https://docs.google.com/fileview?id=0B88iFXWgVKt-NDc2N2FiM2QtYzQzYS00MWMxLWE4MGEtZjUwZDlmNzc3MTcz&hl=en
  • ...4 more comments...
  • Ma Ru on 21 Jul 10
     
    This. Memo. Is. Awesome.
  • pacome delva on 21 Jul 10
     
    quite weird this note of IPCC... I feel more like people have to be educated...
  • Nicholas Lan on 21 Jul 10
     
    i agree. however, (and perhaps it would have been useful to post my source which didn't seem so interesting at the time) the contents of this particular memo seems to have been interpreted as a more or less direct consequence of "ClimateGate" rather than standard practice. http://freakonomics.blogs.nytimes.com/2010/07/14/what-we-talk-about-when-we-talk-about-climate-change/ On the other hand, I'd suggest that talking to the press is not necessarily a great way of educating the public, there being some truth i think to the contents of the memo.
  • LeopoldS on 21 Jul 10
     
    don't know why this seems weired or shocking - looks like some good practice advice to me
  • pacome delva on 21 Jul 10
     
    well compare to ESA it's sure it doesn't seem weird. Imagine one second a journal article about climate change: "We contacted Dr. X of the IPCC, who refused to answer to our questions..."
  • LeopoldS on 22 Jul 10
     
    this is not what the memo recommends ... it just says speak only about what you can confidently speak about and refer to others for other questions ...
LeopoldS

NASA - Exploration of Near Earth Objects (NEO) Objectives Workshop [Explore NOW] - 3 views

www.nasa.gov/...neoworkshop.html

NEO technology space science

shared by LeopoldS on 03 Aug 10 - Cached
  • LeopoldS on 03 Aug 10
     
    good to see what they come up with there ... assume that our JPL friends are there also
Juxi Leitner

How I became a Foursquare cyberstalker | Technology | The Guardian - 0 views

www.guardian.co.uk/...foursquare

tech technology INF fun privacy geo location social networks

shared by Juxi Leitner on 23 Jul 10 - Cached
  • Foursquare is now being widely touted as the app which will, after years of anticipation and prediction, mark the beginning of "life as a game" computing. Whatever you do, wherever you go, you will be scoring points, earning "medals", and be in, at the very least, social competition with other users around you.
  • Privacy seems to be very low down their priorities. In theory, if every user knows the risks, this is fine. But they just don't. It's being targeted at 18 to 25-year-olds. Facebook was forced in the end to change its default privacy settings due to public concerns. Foursquare should do the same. Some people are even checking in when they're at home. Think of the implications. It's crazy
  • Recruitment is a form of stalking, I suppose. But I can now see the negative implications of Foursquare in the real world.
  • ...1 more annotation...
  • Ten days ago Foursquare reached the two-million-users landmark, just three months after it had reached the one-million mark. A week earlier, the company received $20m in venture capital from a who's who of Silicon Valley luminaries. It appears the trajectory for Foursquare is only upwards. But as the critical mass of Foursquare users swells and intensifies over the coming months and years, the concerns over privacy are likely to magnify. In June, Webroot, a Denver-based internet security firm, surveyed 1,645 users of "geo-location-ready mobile devices", including 624 in the UK: 29% said they shared their location with people other than their friends; 31% said they accepted a friend request from a stranger; and, yet, 55% still said they were worried about their loss of privacy.
  • Juxi Leitner on 23 Jul 10
     
    anybody here using Foursquare already? Location is supposed to be "the future" (this time)
  • LeopoldS on 24 Jul 10
     
    this is worse than having a mobile ... !
Francesco Biscani

Gamers beat algorithms at finding protein structures - 0 views

arstechnica.com/...finding-protein-structures.ars

inf

shared by Francesco Biscani on 04 Aug 10 - Cached
  • Foldit takes a hybrid approach. The Rosetta algorithm is used to create some potential starting structures, but users are then given a set of controls that let them poke and prod the protein's structure in three dimensions; displays provide live feedback on the energy of a configuration. 
  • By tracing the actions of the best players, the authors were able to figure out how the humans' excellent pattern recognition abilities gave them an edge over the computer.
  • Humans turn out to be really bad at starting from a simple linear chain of proteins; they need a rough idea of what the protein might look like before they can recognize patterns to optimize. Given a set of 10 potential structures produced by Rosetta, however, the best players were very adept at picking the one closest to the optimal configuration.
  • ...1 more annotation...
  • The authors also note that different players tended to have different strengths. Some were better at making the big adjustments needed to get near an energy minimum, while others enjoyed the fine-scale tweaking needed to fully optimize the structure. That's where Foldit's ability to enable team competitions, where different team members could handle the parts of the task most suited to their interests and abilities, really paid off.
  • Francesco Biscani on 04 Aug 10
     
    Some interesting ideas for our crowdsourcing game in here.
Joris _

SPACE.com -- Railway to the Sky? NASA Ponders New Launch System - 3 views

www.space.com/...ew-nasa-technology-100914.html

space technology future

shared by Joris _ on 16 Sep 10 - No Cached
  • A team of engineers from NASA's Kennedy Space Center in Florida and some of the agency's other field centers are looking into this and other novel launch systems based on cutting-edge technologies.
  • The launch system would require some advancements of existing technologies, but it wouldn't need any brand-new technologies to work
  • Scramjet vehicles could be used as a basis for a commercial launch program
  • ...1 more annotation...
  • It's not very often you get to work on a major technology revolution
  • Juxi Leitner on 16 Sep 10
     
    I wonder if they are also working with that SCRAMSPACE initiative in Australia that was presented at ESTEC a while back...
  • Giusi Schiavone on 19 Sep 10
     
    what about a space elevator!!! quiet old concept (1895), see this link on wiki http://en.wikipedia.org/wiki/Space_elevator
nikolas smyrlakis

GE: Ecomagination Challenge: Home - 1 views

challenge.ecomagination.com/ideas

shared by nikolas smyrlakis on 23 Sep 10 - No Cached
  • nikolas smyrlakis on 23 Sep 10
     
    always ideas to power the (smart) grid effectively are needed.
duncan barker

Vienna University of Technology: News Detail - 2 views

www.tuwien.ac.at/...6648

shared by duncan barker on 13 Oct 10 - No Cached
  • duncan barker on 13 Oct 10
     
    Storing energy with flywheels instead of batteries. This is not a new idea, but i just put it on here so you are aware of it.
Giusi Schiavone

Human-Like Brain Found in Worm : Discovery News - 1 views

news.discovery.com/...worm-human-brain.html

brain worm

shared by Giusi Schiavone on 13 Oct 10 - No Cached
  • Giusi Schiavone on 13 Oct 10
     
    'mushroom' (invertebrate brain) or 'cauliflower'(vertebrate cerebral cortex)? Both are responsible for associative learning and memory formation.
  • duncan barker on 13 Oct 10
     
    thats disgusting
Joris _

American Institute of Aeronautics and Astronautics - Space and the Biological Economy - 0 views

www.aiaa.org/content.cfm

BIO MAD space science

shared by Joris _ on 11 Oct 10 - No Cached
  • the U.S. space program has a robust life science program that is diligently working to innovate new approaches, research and technologies in the fields of biotechnology and bio-nanotechnology science, which are providing new solutions for old problems – including food security, medical needs and energy needs
  • more money be allocated to develop environmentally sound and energy efficient engine programs for commercial and private aviation
  • waste water program
  • ...3 more annotations...
  • we lack fundamental knowledge about the entire effect of the photosynthesis system on food growth, and that space-based research could provide vital clues to scientists on how to streamline the process to spur more efficient food growth
  • From the start of the space age until 2010 only around 500 people have journeyed into space, but with the advent of private space travel in the next 24 months another 500 people are expected to go into space
  • Wagner indentified prize systems that award monetary prizes to companies or individuals as an effective way to spur innovation and creativity, and urged the Congressional staffers present to consider creating more prize systems to stimulate needed innovation
  • Joris _ on 11 Oct 10
     
    a bunch of ideas, iinitiatives, and good points about upcoming changes in space ...
Luís F. Simões

NASA Goddard to Auction off Patents for Automated Software Code Generation - 0 views

www.spaceref.com/...viewpr.html

nasa patents software fault-tolerance design swarm

shared by Luís F. Simões on 04 Nov 10 - No Cached
  • The technology was originally developed to handle coding of control code for spacecraft swarms, but it is broadly applicable to any commercial application where rule-based systems development is used.
  • Luís F. Simões on 04 Nov 10
     
    This is related to the "Verified Software" item in NewScientist's list of ideas that will change science. At the link below you'll find the text of the patents being auctioned: http://icapoceantomo.com/item-for-sale/exclusive-license-related-improved-methodology-formally-developing-control-systems :) Patent #7,627,538 ("Swarm autonomic agents with self-destruct capability") makes for quite an interesting read: "This invention relates generally to artificial intelligence and, more particularly, to architecture for collective interactions between autonomous entities." "In some embodiments, an evolvable synthetic neural system is operably coupled to one or more evolvable synthetic neural systems in a hierarchy." "In yet another aspect, an autonomous nanotechnology swarm may comprise a plurality of workers composed of self-similar autonomic components that are arranged to perform individual tasks in furtherance of a desired objective." "In still yet another aspect, a process to construct an environment to satisfy increasingly demanding external requirements may include instantiating an embryonic evolvable neural interface and evolving the embryonic evolvable neural interface towards complex complete connectivity." "In some embodiments, NBF 500 also includes genetic algorithms (GA) 504 at each interface between autonomic components. The GAs 504 may modify the intra-ENI 202 to satisfy requirements of the SALs 502 during learning, task execution or impairment of other subsystems."
pacome delva

Information converted to energy - physicsworld.com - 4 views

physicsworld.com/...44385

phy information maxwell_demon

shared by pacome delva on 22 Nov 10 - No Cached
  • By tracking the particle's motion using a video camera and then using image-analysis software to identify when the particle had rotated against the field, the researchers were able to raise the metaphorical barrier behind it by inverting the field's phase. In this way they could gradually raise the potential of the particle even though they had not imparted any energy to it directly.
  • "Nobody thinks of using bits to boil water," he says, "but that would in principle be possible at nanometre scales." And he speculates that molecular processes occurring in nature might already be converting information to energy in some way. "The message is that processes taking place on the nanoscale are completely different from those we are familiar with, and that information is part of that picture."
  • pacome delva on 22 Nov 10
     
    crazy, the Maxwell's demon at work !
  • Nicholas Lan on 23 Nov 10
     
    crazy indeed
pacome delva

Penrose claims to have glimpsed universe before Big Bang - 0 views

physicsworld.com/...44388

phy cosmology

shared by pacome delva on 22 Nov 10 - No Cached
LeopoldS liked it
  • According to Penrose and Gurzadyan, these circles allow us to "see through" the Big Bang into the aeon that would have existed beforehand. The circles, they say, are the marks left in our aeon by the spherical ripples of gravitational waves that were generated when black holes collided in the previous aeon.
  • Julian Barbour, a visiting professor of physics at the University of Oxford, says that these circles would be "remarkable if real and sensational if they confirm Penrose's theory". They would, he says, "overthrow the standard inflationary picture", which, he adds, has become widely accepted as scientific fact by many cosmologists. But he believes that the result will be "very controversial" and that other researchers will look at the data very critically. He says there are many disputable aspects to the theory
  • pacome delva on 22 Nov 10
     
    hehe, a nice controversy? or completely overinterpreted results...?
  • LeopoldS on 23 Nov 10
     
    what the heck is this? sounds strange to me ... would I understand the original paper?
Francesco Biscani

BBC News - Nasa rides 'bucking bronco' to Mars - 2 views

news.bbc.co.uk/...8509080.stm

nasa mars

shared by Francesco Biscani on 19 Feb 10 - Cached
  • Francesco Biscani on 19 Feb 10
     
    Look at the video... are they really going to pull this off?
  • Ma Ru on 19 Feb 10
     
    > it will be lowered on to the surface of Mars with a landing system that has never been tried before yikes!
Nina Nadine Ridder

Stratospheric Water Vapor is a Global Warming Wild Card - 1 views

www.sciencedaily.com/...100131145840.htm

global_warming climate_models water_cycle

shared by Nina Nadine Ridder on 22 Feb 10 - Cached
  • Nina Nadine Ridder on 22 Feb 10
     
    Climate models are not able to reproduce the observed decrease in stratospheric water vapor which shows that the global water cycle is still not known well enough and further research is desperately needed. 
Juxi Leitner

Technology Review: Blogs: arXiv blog: Physicist Discovers How to Teleport Energy - 4 views

www.technologyreview.com/...24759

tech phy quantum entanglement nrg

shared by Juxi Leitner on 09 Feb 10 - Cached
pacome delva liked it
  • He gives the example of a string of entangled ions oscillating back and forth in an electric field trap, a bit like Newton's balls. Measuring the state of the first ion injects energy into the system in the form of a phonon, a quantum of oscillation. Hotta says that performing the right kind of measurement on the last ion extracts this energy. Since this can be done at the speed of light (in principle), the phonon doesn't travel across the intermediate ions so there is no heating of these ions. The energy has been transmitted without traveling across the intervening space.
  • Juxi Leitner on 09 Feb 10
     
    wonder if we can use that to power a moon base .... or on-board a SBSP satellite
  • ...1 more comment...
  • LeopoldS on 09 Feb 10
     
    will still have to read the actual article but am a bit sceptic if this interpretation really will hold ... what are our fundamental physicists saying about this?
  • Juxi Leitner on 10 Feb 10
     
    I am not the physicist but I thought it might be interesting, from a space security point-of-view
  • pacome delva on 11 Feb 10
     
    Yes it seems really interesting and opens new possibilities. However this technology review article is not very good and the guy uses terms which have a precise meaning (like teleportation), which is different from the word we know... Quantum teleportation is what we use for designing quantum computers, but we are quite far from any practical applications. This energy teleportation will allow new scheme involving energy (if it is experimentally confirmed) which is very nice. However it seems this occurs in an entangled many-body system, which the only macroscopic one I know is a bose-eintein condensate (BEC). So it would mean infuse energy in the BEC by doing a measurement on one of the atom and extract it few millimeters away by doing a measurement on another atom. very far from any long distance power transmission...
nikolas smyrlakis

How siestas help memory: Sleepy heads | The Economist - 3 views

www.economist.com/...displaystory.cfm

siestas nap memory economist

shared by nikolas smyrlakis on 01 Mar 10 - Cached
Ma Ru liked it
  • nikolas smyrlakis on 01 Mar 10
     
    How much more proof do we need.... and of course "It may be that those who have a tendency to wake up groggy are choosing not to siesta in the first place. Perhaps, though, as in so many things, it is practice that makes perfect."
  • Ma Ru on 01 Mar 10
     
    Come on guys, be innovative and make at least an Ariadna...
nikolas smyrlakis

The Olympics run on Windows (XP) | Beyond Binary - CNET News - 3 views

news.cnet.com/8301-13860_3-10459312-56.html

windows XP winter olympics

shared by nikolas smyrlakis on 25 Feb 10 - Cached
  • nikolas smyrlakis on 25 Feb 10
     
    The good news for Microsoft is that all the PCs powering the Olympics are running Windows. The bad news: it's the older Windows XP operating system.
  • Luzi Bergamin on 25 Feb 10
     
    Now I start to understand why the Swiss win so many medals. That's most probably a bug!!!
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