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LeopoldS

NPS CUBESAT LAUNCHER DESIGN, PROCESS AND REQUIREMENTS - 2 views

www.dtic.mil/...GetTRDoc

cubesat Launcher

shared by LeopoldS on 28 Apr 12 - No Cached
LeopoldS liked it
  • LeopoldS on 28 Apr 12
     
    Interesting mater thesis that lead to the just announced new launcher ! Remember our discussion after the advanced concepts workshop!?!?!
  • Christos Ampatzis on 29 Apr 12
     
    do you know about this? https://www.qb50.eu/launch.php
  • LeopoldS on 29 Apr 12
     
    I knew about the project only, but not about this very interesting missile ... "The launcher has a remarkable track record of several hundred successful launches and only 1 failure. Shtil is marketed by the State Rocket Center Makeyev."
Lionel Jacques

Solar Energy Generation in Three Dimensions - 1 views

arxiv.org/1112.3266

science NRG

shared by Lionel Jacques on 21 Dec 11 - No Cached
  • Lionel Jacques on 21 Dec 11
     
    A simple cube open at the top can increase the annual energy density generation by a factor (depending on the latitude) of 2 - 3.8 compared to a flat horizontal panel, versus an increase by a factor of 1.3 - 1.8 achieved from a flat panel using dual-axis tracking. Genetic algorithm are used to optimize the energy production in a day for arbitrarily shaped 3D solar cells confined to a given area footprint and total volume doi:10.1063/1.3308490 could be interesting to investigate
Lionel Jacques

Joggobot turns a quadrocopter into a running companion - 3 views

www.gizmag.com/...22899

quadrocopter FUN AI

shared by Lionel Jacques on 12 Jun 12 - No Cached
LeopoldS liked it
  • Lionel Jacques on 12 Jun 12
     
    Joggobot turns a quadrocopter into a running companion Researchers from RMIT in Melbourne, Australia have developed a flying running companion called Joggobot. The system uses the built-in camera on a commercially-available Parrot AR Drone quadrocopter to track the position of a jogger, and fly a few feet out in front.
Tom Gheysens

Biomimicr-E: Nature-Inspired Energy Systems | AAAS - 4 views

www.aaaspolicyfellowships.org/...nature-inspired-energy-systems

energy science phy space

shared by Tom Gheysens on 13 Jan 14 - No Cached
  • Tom Gheysens on 13 Jan 14
     
    some biomimicry used in energy systems... maybe it sparks some ideas
  • LeopoldS on 27 Jan 14
     
    not much new that has not been shared here before ... BUT: we have done relativley little on any of them. for good reasons?? don't know - maybe time to look into some of these again more closely Energy Efficiency( Termite mounds inspired regulated airflow for temperature control of large structures, preventing wasteful air conditioning and saving 10% energy.[1] Whale fins shapes informed the design of new-age wind turbine blades, with bumps/tubercles reducing drag by 30% and boosting power by 20%.[2][3][4] Stingray motion has motivated studies on this type of low-effort flapping glide, which takes advantage of the leading edge vortex, for new-age underwater robots and submarines.[5][6] Studies of microstructures found on shark skin that decrease drag and prevent accumulation of algae, barnacles, and mussels attached to their body have led to "anti-biofouling" technologies meant to address the 15% of marine vessel fuel use due to drag.[7][8][9][10] Energy Generation( Passive heliotropism exhibited by sunflowers has inspired research on a liquid crystalline elastomer and carbon nanotube system that improves the efficiency of solar panels by 10%, without using GPS and active repositioning panels to track the sun.[11][12][13] Mimicking the fluid dynamics principles utilized by schools of fish could help to optimize the arrangement of individual wind turbines in wind farms.[14] The nanoscale anti-reflection structures found on certain butterfly wings has led to a model to effectively harness solar energy.[15][16][17] Energy Storage( Inspired by the sunlight-to-energy conversion in plants, researchers are utilizing a protein in spinach to create a sort of photovoltaic cell that generates hydrogen from water (i.e. hydrogen fuel cell).[18][19] Utilizing a property of genetically-engineered viruses, specifically their ability to recognize and bind to certain materials (carbon nanotubes in this case), researchers have developed virus-based "scaffolds" that
Thijs Versloot

Telescope to track space junk using youth radio station - 0 views

www.alphagalileo.org/ViewItem.aspx

shared by Thijs Versloot on 02 Dec 13 - No Cached
  • Thijs Versloot on 02 Dec 13
     
    Team leader Professor Steven Tingay, Director of the MWA at Curtin University and Chief Investigator in the Australian Research Council Centre for All-sky Astrophysics (CAASTRO) said the MWA will be able to detect the space junk by listening in to the radio signals generated by stations including popular youth network Triple J.
Thijs Versloot

HealthMap software flagged Ebola 9 days before outbreak announced - 0 views

healthmap.org/ebola

AI health

shared by Thijs Versloot on 11 Aug 14 - No Cached
annaheffernan liked it
  • Thijs Versloot on 11 Aug 14
     
    HealthMap uses algorithms to scour tens of thousands of social media sites, local news, government websites, infectious-disease physicians' social networks and other sources to detect and track disease outbreaks. Sophisticated software filters irrelevant data, classifies the relevant information, identifies diseases and maps their locations with the help of experts.
Paul N

Wiring of retina reveals how eyes sense motion - 2 views

www.nature.com/...-how-eyes-sense-motion-1.15147

BIO

shared by Paul N on 05 May 14 - No Cached
  • Paul N on 05 May 14
     
    Basically neuroscientists discovered time delay neural networks. Guess we were right on track with AI back in the 70s.
Paul N

Deep Learning, an Overview - 2 views

www.idsia.ch/...DeepLearning30April2014.pdf

AI

shared by Paul N on 07 May 14 - No Cached
  • Paul N on 07 May 14
     
    For those interested in AI, a good idea to keep track of what's recently been put out there
  • Ma Ru on 07 May 14
     
    From a quick glance, a serious contender to the most unreadable article ever. 60% of the pages of this document are references... Still, in the use of abbreviations doesn't even come close to aerospace...
Thijs Versloot

Search DuckDuckGo - 0 views

duckduckgo.com

internet

shared by Thijs Versloot on 23 Aug 13 - No Cached
johannessimon81 and H H liked it
  • Thijs Versloot on 23 Aug 13
     
    DuckDuckGo is a search engine that does not track you and, has more instant answers and less spam/clutter. You can still search google hits by added !g to your search query, which will then send an encrypted search request to google and return only the sensible part
  • H H on 23 Aug 13
     
    !w = Wikipedia !wa = Wolfram alpha !y = Yahoo
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.
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
Juxi Leitner

Baby-by-Number: Parents' New Obsession With Data | Wired Science | Wired.com - 0 views

www.wired.com/...baby-tracking

tech babies

shared by Juxi Leitner on 14 Dec 09 - Cached
  • Even the folks at LeapFrog caution that electronic toys shouldn’t replace the tried-and-true childhood staples of previous generations. Plain old wooden blocks can be an incredibly valuable learning tool, says Jim Gray, a former child development researcher who now heads the learning team at LeapFrog.
  • Juxi Leitner on 14 Dec 09
     
    for the dad's out there...
LeopoldS

Track changes with LaTeX - 3 views

trackchanges.sourceforge.net

latex

shared by LeopoldS on 25 Jan 10 - Cached
  • LeopoldS on 25 Jan 10
     
    did any of you Latex gurus already try this out?
  • ...1 more comment...
  • Luzi Bergamin on 25 Jan 10
     
    It's installed on my computer, but I never really used it. I think it's fine, but for my purposes latexdiff mostly is enough.
  • LeopoldS on 25 Jan 10
     
    I assume that you use latexdiff from the command line ... still have to find a nice script with which to integrate it into the TexShop GUI for Karène ...
  • Luzi Bergamin on 25 Jan 10
     
    A command line is an interface as well. I was able to explain via phone to a (computer-wise) avarage undereducated Mac-user how to install and run latexdiff. Thus I think also Karene can use it...
santecarloni

Even Robots Can Be Heroes - ScienceNOW - 5 views

news.sciencemag.org/...even-robots-can-be-heroes.html

robots AI

shared by santecarloni on 05 May 11 - No Cached
LeopoldS liked it
  • santecarloni on 05 May 11
     
    "Computer simulations of tiny robots with rudimentary nervous systems show that, over hundreds of generations, these virtual machines evolve altruistic behaviors"
  • Luís F. Simões on 06 May 11
     
    I have lost track of all the artificial life/evolutionary computing studies showing the evolution of cooperation/altruism. I don't understand why all the big fuss about this latest one.
Luís F. Simões

Bitcoin P2P Currency: The Most Dangerous Project We've Ever Seen - 10 views

launch.is/...dangerous-project-weve-ev.html

bitcoin p2p money disruptive

shared by Luís F. Simões on 16 May 11 - No Cached
LeopoldS liked it
  • After month of research and discovery, we’ve learned the following:1. Bitcoin is a technologically sound project.2. Bitcoin is unstoppable without end-user prosecution.3. Bitcoin is the most dangerous open-source project ever created.4. Bitcoin may be the most dangerous technological project since the internet itself.5. Bitcoin is a political statement by technotarians (technological libertarians).*6. Bitcoins will change the world unless governments ban them with harsh penalties.
  • The benefits of a currency like this:a) Your coins can’t be frozen (like a Paypal account can be)b) Your coins can’t be trackedc) Your coins can’t be taxedd) Transaction costs are extremely low (sorry credit card companies)
  • An individual with the name -- or perhaps handle -- of Satoshi Nakamoto first wrote about bitcoins in a paper called Bitcoin: A Peer-to-Peer Electronic Cash System.
  • ...1 more annotation...
  • * We made this term up to describe the “good people” of the internet who believe in the fundamental rights of individuals to be free, have free speech, fight hypocrisy and stand behind logic, technology and science over religion, political structure and tradition. These are the people who build and support things like Wikileaks, Anonymous, Linux and Wikipedia. They think that people can, and should, govern themselves. They are against external forms of control such as DRM, laws that are bought and sold by lobbyists, and religions like Scientology. They include splinter groups that enforce these ideals in the form of hacktivism, such as the takedown of the Sony Playstation Network after Sony tried to prosecute a hacker for unlocking its console.
  • Ma Ru on 17 May 11
     
    Sounds good!
  • ...9 more comments...
  • pacome delva on 18 May 11
     
    wow it's frigthening! it's the dream of every anarchist, every drug, arm, human dealer! the world made as a global fiscal paradise... the idea is clever however it will not replace real money because 1 - no one will build a fortune on bitcoin if a technological breakthrough can ruin them 2 - government never allowed parallel money to flourish on their territory, so it will be almost impossible to change bitcoin against euros or dollars
  • Nicholas Lan on 18 May 11
     
    interesting stuff anyone read cryptonomicon by neal stephenson? similar theme.
  • Luís F. Simões on 18 May 11
     
    :) yes. One of the comments on reddit was precisely drawing the parallels with Neal Stephenson's Snowcrash / Diamond Age / Cryptonomicon. Interesting stuff indeed. It has a lot of potential for misuse, but also opens up new possibilities. We've discussed recently how emerging technologies will drive social change. Whether it's the likes of NSA / CIA who will benefit the most from the Twitters, Facebooks and so on, by gaining greater power for control, or whether individuals are being empowered to at least an identical degree. We saw last year VISA / PayPal censoring WikiLeaks... Well, here's a way for any individual to support such an organization, in a fully anonymous and uncontrollable way...
  • tvinko on 18 May 11
     
    One of my colleagues has made a nice, short write-up about BitCoin: http://www.pds.ewi.tudelft.nl/~victor/bitcoin.html
  • LeopoldS on 18 May 11
     
    very nice analysis indeed - thanks Tamas for sharing it!
  • pacome delva on 20 May 11
     
    mmm I'm not an expert but it seemed to me that, even if these criticisms are true, there is one fundamental difference between the money you exchange on internet via your bank, and bitcoins. The first one is virtual money and the second one aims at being real, physical, money, even if digital, in the same way as banknotes, coins, or gold.
  • nikolas smyrlakis on 20 May 11
     
    An algorithm wanna-be central bank issuing untraceable tax free money between internet users? not more likely than the end of the world supposed to take place tomorrow, in my opinion. Algorithms don't usually assault women though !:P
  • LeopoldS on 21 May 11
     
    well, most money is anyway just virtual and only based on expectations and trust ... (see e.g. http://en.wikipedia.org/wiki/Money_supply) and thus if people trust that this "money" has some value in the sense that they can get something of value to them in exchange, then not much more is needed it seems to me ...
  • pacome delva on 23 May 11
     
    @Leopold: ok let's use the rigth words then. Bitcoin aim at being a currency ("physical objects generally accepted as a medium of exchange" from wikipedia), different than the "demand deposit". In the article proposed by Tamas he compares what cannot be compared (currencies, demand deposits and their mean of exchange). The interesting question is wether one can create a digital currency which is too difficult to counterfeit. As far as I know, there is no existing digital currency except this bitcoins (and maybe the currencies from games as second life and others, but which are of limited use in real world).
  • nikolas smyrlakis on 23 May 11
     
    well of course money is trust, and even more loans and credit and even more stock and bond markets. It all represents trust and expectations. However since the first banks 500 years ago and the first loans etc. etc., and as well the fact that bonds and currencies bring down whole countries (Greece lately), and are mainly controlled by large financial centres and (central) banks, banks have always been on the winning side no matter what and that isn't going to change easily. So if you are talking about these new currencies it would be a new era, not just a new currency. So should Greece convert its debt to bitcoins ;P ?
  • pacome delva on 23 May 11
     
    well, from 1936 to 1993 the central bank of france was owned by the state and was supposed to serve the general interest...
LeopoldS

Redmine - Overview - Redmine - 4 views

www.redmine.org

opensource INF

shared by LeopoldS on 08 Oct 09 - Cached
  • tvinko on 08 Oct 09
     
    if you want to be a winner...
  • Juxi Leitner on 08 Oct 09
     
    I used Tracks, also a RoR based project mgmt tool a while back... http://getontracks.org/
  • LeopoldS on 16 Nov 11
     
    anybody had tried this out already?
nikolas smyrlakis

NASDAQ market index to track smart grid, electric infrastructure - Finance - Renewable ... - 0 views

www.rechargenews.com/...article191916.ece

smart electricity grid stockmarket

shared by nikolas smyrlakis on 23 Sep 09 - Cached
  • nikolas smyrlakis on 23 Sep 09
     
    how about that for smartgrids etc
ESA ACT

Head Tracking for Desktop VR Displays using the WiiRemote - 0 views

www.core77.com/...s_using_the_wiiremote_8620.asp

3D game technology

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    did you try it, Luca?? a simple way to make 3D effects with your wii.....amazing
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