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Juxi Leitner

YouTube - The latest version of the LittleDog Robot - 3 views

www.youtube.com/watch

robotics control biomimetics tech wow

shared by Juxi Leitner on 27 May 10 - Cached
Joris _ liked it
  • Juxi Leitner on 27 May 10
     
    whoa!!!
  • Joris _ on 28 May 10
     
    impressive (http://www-clmc.usc.edu/Research/LearningLocomotion for papers ...)
Joris _

'Space yacht' IKAROS takes images of its solar sail :: Brahmand.com - 2 views

www.brahmand.com/...13.html

shared by Joris _ on 16 Jun 10 - Cached
LeopoldS liked it
  • LeopoldS on 16 Jun 10
     
    very nice!! could not find the dimensions yet ...
  • Joris _ on 16 Jun 10
     
    20m diagonal http://www.jspec.jaxa.jp/e/activity/ikaros.html http://www.jspec.jaxa.jp/e/activity/images/ikaros/pic_07_l.jpg
  • LeopoldS on 17 Jun 10
     
    that is honestly a little bit less impressive than I had hoped for ... this "just" 200 m2 ... our Furoshiki net had already 130m2 and we deployed it within 1 min under much worse conditions ...
LeopoldS

Open innovation and Apple .... - 6 views

www.linkedin.com/news

open innovation IT

shared by LeopoldS on 14 Jun 10 - No Cached
  • LeopoldS on 14 Jun 10
     
    interesting blog entry
  • ...3 more comments...
  • Francesco Biscani on 14 Jun 10
     
    Your link points to a restricted LinkedIn page... Here's the original link: http://www.15inno.com/2010/06/07/apple/
  • Francesco Biscani on 14 Jun 10
     
    A pretty standard Apple-o-getic (ah ah) blog post. How many times does the guy say 'I like Apple'? Anyway, I'm having a hard time understanding the point he is trying to make. Apple should open up its innovation? It shouldn't because they are so hip, cool, a 'unique company' and an 'exception to the rule'? Mah..
  • Ma Ru on 14 Jun 10
     
    I think the point is the guy bashes the "open innovation theory" (whatever the theory is) with his main argument being that Apple is not open and at the same time very successful.
  • LeopoldS on 14 Jun 10
     
    this guy is actually one of the most fervent supporters of open innovation and tries to promote it whereever he can ... his problem is that at least at first view Apple does not confirm his theory ...
  • Francesco Biscani on 15 Jun 10
     
    lol, the 'about' page is priceless bullshit: http://www.15inno.com/about-15inno/ "Corporate Mind Exchange (CMX) events in which corporate innovation leaders discuss relevant challenges and issues. No academics, consultants or start-ups; just corporate practitioners." We are doing it wrong, Leo. We don't need no stinking Universities! "Network groups in which 12-20 innovation leaders from different companies meet 4-6 times annually to discuss challenges and issues. Workshops and events with thought leaders and practitioners." What the hell are "innovation/thought leaders"?
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
LeopoldS

iWrite - 3 views

www.vancapy.com/iWrite

fun computer INF

shared by LeopoldS on 16 Nov 10 - No Cached
  • LeopoldS on 16 Nov 10
     
    another reason to buy an ipad .... :-)
  • ...3 more comments...
  • Francesco Biscani on 16 Nov 10
     
    How is this any different from the slew of existing WYSISYG LaTeX-based editors? E.g., http://www.texmacs.org/
  • duncan barker on 17 Nov 10
     
    wow!!!!!!!!!!!! you can write equations!!!!!!!!!!
  • Ma Ru on 17 Nov 10
     
    "What you need: - A LaTeX installation" I guess you can buy one in Apple Store... no?
  • LeopoldS on 17 Nov 10
     
    my understanding is that it runs on your other computer who would do all the compiling ....
  • LeopoldS on 17 Nov 10
     
    texmacs ... and how do you install this on the iPad?
Luís F. Simões

This Will Change Everything: Ideas That Will Shape the Future (The Edge Annual Question - 2009) - 3 views

www.edge.org/q09_index.html

edge future science technology

shared by Luís F. Simões on 28 Nov 10 - Cached
LeopoldS liked it
  • WHAT WILL CHANGE EVERYTHING? "What game-changing scientific ideas and developments do you expect to live to see?"
  • That's the question John Brockman, editor of the Web site edge.org, posed to about 160 cutting-edge minds in his 11th annual Edge Question. As in years past, they responded with bold, often thrilling, sometimes chilling, answers.
  • Luís F. Simões on 28 Nov 10
     
    And here's the same thing, but in dead-trees format: http://www.amazon.com/This-Will-Change-Everything-Future/dp/0061899674 Anyone else thinks that the ACT should buy us all a copy as a Christmas present? :)
  • LeopoldS on 29 Nov 10
     
    you are the ACT!!!
terencepf

helium discussion - 0 views

www.infidels.org/...helium.html

helium atmosphere science

shared by terencepf on 03 Dec 10 - No Cached
  • terencepf on 03 Dec 10
     
    This link has a nice concise explanation of helium escaping the atmosphere. http://www.astronomynotes.com/solarsys/s3.htm (this link describes the mechanics of particles escaping the atmosphere, this includes escape velocity, thermal and nonthermal process) http://www.springerlink.com/content/k094u75188h64516/fulltext.pdf ( and if you are really interested, this paper discuss helium in the atmosphere (production and loss) in much more detail )
Joris _

Japan probe overshoots Venus, heads toward sun - 0 views

www.washingtonpost.com/...AR2010120701077.html

MAD venus robust

shared by Joris _ on 08 Dec 10 - No Cached
sreejanag liked it
  • A Japanese probe to Venus failed to reach orbit Wednesday and was captured by the sun's gravitational pull
  • Akatsuki's engines did not fire long enough to attain the proper orbiting position
  • may be able to try again when it passes by Venus six years from now.
  • Joris _ on 08 Dec 10
     
    The usefulness of having a robust trajectory :) ... They have to wait 6 more years for another date with Venus ...
  • ...2 more comments...
  • Joris _ on 09 Dec 10
     
    a follow up: http://www.space.com/missionlaunches/japan-venus-probe-failure-try-again-101208.html
  • LeopoldS on 11 Dec 10
     
    I agree in general but just out of the stomach: is there really an optimised trajectory that would be able to avoid this kind of scenarios when main thrusters don't perform properly? Wouldn't you in any case end up in a sun-orbiting trajectory and have to come back after years??
  • Joris _ on 11 Dec 10
     
    "optimised trajectory" of course not, robust definitely! It was the subject of my paper presented at the AAS (the one in San Diego) "Designing robust interplanetary trajectories subject to one temporary engine failure". The problem here is that they do not have enough fuel for a correction maneuver that would allow to come back to Venus earlier, and break for a VOI. A robust scenario could have alloted the best amount of fuel and time to be able to recover from almost all possible unplanned events. In the paper, I introduce some confidence regions such that I get the robust control for p% chance of mission success in case m% chance of problem with the propulsion system.
  • Dario Izzo on 12 Dec 10
     
    You should run your method on this scenario and see if you could get a trajectory with a shorter come back time using the same spacecraft.... would be a big selling point for a new trajectory design approach
Luís F. Simões

heat shields: NASA's Orion capsule vs. SpaceX's Dragon capsule - 0 views

neil.fraser.name/09

re-entry shielding design optimization spacex nasa

shared by Luís F. Simões on 11 Dec 10 - No Cached
  • NASA has 50 years of experience with reentry capsules, but is fearful of trying something new. SpaceX has no reentry experience and chooses the most efficient engineering approach. Guess whose capsule is overweight and still sitting on the ground? Guess whose capsule completed a successful first flight yesterday?
  • Dario Izzo on 12 Dec 10
     
    Powerful contrast between the two pictures!!
Friederike Sontag

New supercomputer at the German Climate Computing Center in Hamburg - 2 views

www.supercomputingonline.com/...te-computing-center-in-hamburg

climate_computing Hamburg Blizzard supercomputer

shared by Friederike Sontag on 11 Dec 09 - Cached
  • Friederike Sontag on 11 Dec 09
     
    and some more info (in German) http://www.pcgameshardware.de/aid,701186/Neuer-DKRZ-Supercomputer-Blizzard-berechnet-Klimamodelle-fuer-Kopenhagener-Weltklimakonferenz/CPU/News/
Tobias Seidl

Do dogs know calculus? - 4 views

www.maa.org/elvisdog.pdf

BIO math optmisation

shared by Tobias Seidl on 25 Jan 10 - No Cached
Luzi Bergamin liked it
  • Tobias Seidl on 25 Jan 10
     
    also check out: "Dogs don't need calculus" (http://www.ingentaconnect.com/content/maa/cmj/2010/00000041/00000001/art00003;jsessionid=ltahkvtsh76n.alexandra)
  • LeopoldS on 25 Jan 10
     
    tobias - please finally put an image to your profile .... :-)
Ma Ru

Researcher Creates 'Facebook for Scientists' - 1 views

www.nytimes.com/...book-for-scientists-22081.html

inf Web 2.0 ariadnet science

shared by Ma Ru on 19 Mar 10 - Cached
  • Ma Ru on 19 Mar 10
     
    https://www.researchgate.net/
  • ...4 more comments...
  • LeopoldS on 20 Mar 10
     
    and we are of course there since some time :-) and even have our own group in there ... think that Tobias has first discovered it our group is: https://www.researchgate.net/group/ESA_Advanced_Concepts_Team/ everybody welcome to join ... though Ariadnet is better
  • Ma Ru on 23 Mar 10
     
    So if I'm already on Ariadnet, there's no need for me to join this researchgate thingy? Pheew..
  • Luzi Bergamin on 23 Mar 10
     
    Very active group, it has exactly one member (Leo) and exactly zero (ZERO,0!!) posts since June 13, 2008!!! Well, sounds like a very typical ACT action in order to increase the key performance indicators :D.
  • Ma Ru on 23 Mar 10
     
    Oh come on Luzi, don't be over-pessimistic! It's just because all activity takes place on Ariadnet ;-)
  • nikolas smyrlakis on 24 Mar 10
     
    tsk tsk typical ex-ACT criticism.. Maybe for me too from next week;P
  • Luzi Bergamin on 24 Mar 10
     
    WRONG! You ignore the fact that I complained already while I was yet in the ACT!! Seriously: I clicked around in "ResearchGate" a little bit, couldn't find too many interesting things. Many scientists from India, Iran etc. desperately looking for contacts, retired engineers/scientists from industry that now remember that they were once at university and also quite a number of semi-crackpots. My honest conclusion: not a must. Btw: wish you a nice post-ACT depression! Keep a stiff upper lip, esp. in case you go back to Greece...
Luzi Bergamin

Physics in a Crisis - 3 views

www.rqm.ch/physics_in_a_crisis.htm

phy LHC crackpot fun

shared by Luzi Bergamin on 30 Mar 10 - Cached
  • Luzi Bergamin on 30 Mar 10
     
    Luckily I'm far away from Geneva, but this has to be said today, when the LHC starts! No, not tiny black holes will eat us (what a nonsense!), but the supernovae energy will let LHC explode!!! Pacome, I expect you to debunk this with gratest care!
  • ...2 more comments...
  • pacome delva on 30 Mar 10
     
    wtf is this! As I read this morning in the newspaper (not even a scientific one), 1 TeV is the kinetic energy of a flying mosquito... so be careful ! It seems they already sloved every thing on this website: "At the Institute for Space Quantum Physics ISQP, it was already proved in 1991-1992 that dark matter is in magnetic fields as magnetic space quantum flux." This website is the biggest source of crackpots i have seen in a long time...! (http://www.supernovae-energy.com/)
  • Ma Ru on 30 Mar 10
     
    Come on guys, this website is hilarious! "The HAITI EARTHQUAKE (...) were impossible for the Institute for Space Quantum Physics (ISQP) to compute because on one single planet was on a common line or axis with the Sun: Venus."
  • Luzi Bergamin on 30 Mar 10
     
    Unfortunately, most information I have about the guy (Hans Lehner, a Swiss) is in German, his official homepage is http://www.rqm.ch/ According to EsoWatch he is the Swiss analogue to Dr. Mills and his Blacklight power. Lehner apparently founded a company, which should have produced a "Raum-Quanten-Motor" that -- of course -- produces energy out of nothing. The theory is based on spookey forces mediated by Lehneronen. 11 Million Swiss Franks (about 8 Million Euro) were lost when the company bankrupt. And the guy is selling new stocks on his homepage again... Lehner calls another crackpot named Oliver Crane Zweistein (from Einstein being "Onestone") and himself "Dreistein". Now he is looking for Mister or Misses Vierstein. Perhaps you should apply, good luck!!
  • Nicholas Lan on 30 Mar 10
     
    i like the first line of their supernovae energy technology document "Dear potential investor:"...
Luzi Bergamin

Vivos Underground Survival Shelter Network for 2012 and Beyond - 0 views

www.terravivos.com/...secureindex.htm

fun apocalypse doomsday

shared by Luzi Bergamin on 29 Apr 10 - Cached
  • Luzi Bergamin on 29 Apr 10
     
    The world will end on 21.12.2012, the Maya knew this (http://www.youtube.com/watch?v=04OilEWckAU in German,) so be prepared! There should be an extra shelter for all (Ex-)ACT members. This would be real fun!! Endless strategic meetings on how to survive after apocalypse!
  • Dario Izzo on 30 Apr 10
     
    No, Luzi, there was an error in the profecy transcription... they meant that Italy would end in 2012, not the world..... and they seem to be quite right according to most observers. I am actually surprised it lasted so long!!!
  • Ma Ru on 30 Apr 10
     
    Of course one of the major reasons behind the apocalypse will be European football championship taking place in Poland+Ukraine...
Luís F. Simões

Rainmaking in Middle Eastern Desert: Success or Scam? | Weather Modification Projects in Abu Dhabi | LiveScience - 1 views

www.livescience.com/...ionization-weather-110104.html

geoengineering climate weather rainfall

shared by Luís F. Simões on 05 Jan 11 - No Cached
  • Fifty-two unanticipated rain showers in a Middle Eastern desert supposedly occurred because of ionizing devices installed in Abu Dhabi as part of a weather-modification project, a company is claiming.
  • Luís F. Simões on 05 Jan 11
     
    This seems to be the Swiss company's website: http://www.meteo-systems.com
Luís F. Simões

SETI, Citrus Division - 1 views

www.newscientist.com/...cted-at-kinetica-art-fair.html

SETI fun

shared by Luís F. Simões on 07 Feb 11 - No Cached
  • A nice contrast to these high-tech installations, Adrian Lee's Search for Extra-Terrestrial Intelligence (SETI) Citrus Division (below), sees 65 lemons trying to communicate with aliens. Using their own juices, these lemon batteries power a small motor - which turns a disc into which is punched the Morse code for "We are here". As the disc rotates, a class 2 laser - also powered by the lemons - shines through the holes and the encoded message is then directed by a small mirror up into space...or in this case, onto the ceiling of the Ambica P3 venue. Amusing, simple and sophisticated all at once, the Citrus Division mixes old and new science and technology in just the right measure.
Luís F. Simões

Pattern | CLiPS - 2 views

www.clips.ua.ac.be/pattern

AI language text data mining web Python

shared by Luís F. Simões on 02 Mar 11 - No Cached
  • Pattern is a web mining module for the Python programming language. It bundles tools for data retrieval (Google + Twitter + Wikipedia API, web spider, HTML DOM parser), text analysis (rule-based shallow parser, WordNet interface, syntactical + semantical n-gram search algorithm, tf-idf + cosine similarity + LSA metrics) and data visualization (graph networks).
  • Luís F. Simões on 02 Mar 11
     
    Intuitive, well documented, and very powerful. A library to keep an eye on. Check the example Belgian elections, June 13, 2010 - Twitter opinion mining
Loretta Latronico Poulain

Behavioural Economics? Try Biological Economics - 2 views

ipezone.blogspot.com/...-economics-try-biological.html

science fun

shared by Loretta Latronico Poulain on 08 Mar 11 - No Cached
  • Luís F. Simões on 08 Mar 11
     
    The "Biological Economics" thing is a hyping (or misunderstanding) of the BBC article. The work it refers to seems to be an application of Complex Networks theory to financial networks. I found what appear to be some of the related publications: Andrew G. Haldane (April 2009) Rethinking the financial network (further references in the footnote to page 10) Erlend Nier, Jing Yang, Tanju Yorulmazer and Amadeo Alentorn (April 2008) Network models and financial stability Funny how these issues have been repeatedly popping up at the ACT in recent weeks. This connects both with the discussions on information spreading in networks, and with roadmaps' robustness.
Joris _

Up telescope! Search begins for giant new planet - 1 views

www.independent.co.uk/...-giant-new-planet-2213119.html

space science

shared by Joris _ on 15 Feb 11 - No Cached
  • Joris _ on 15 Feb 11
     
    http://www.independent.co.uk/multimedia/archive/00555/tyche3_555342a.pdf Icarus' paper: http://xxx.lanl.gov/PS_cache/arxiv/pdf/1004/1004.4584v1.pdf
  • Luís F. Simões on 15 Feb 11
  • Joris _ on 15 Feb 11
     
    well, he kind-of falls into his own trap: confusing/discussing "evidence" with "likelihood", and "there is" with "it may". He should have made more efforts in his writing, what he says is a bit pointless! (just put the Icarus' paper)
Luís F. Simões

Lockheed Martin buys first D-Wave quantum computing system - 1 views

www.dwavesys.com/...pressreleases.html

quantum_computation

shared by Luís F. Simões on 26 May 11 - No Cached
  • D-Wave develops computing systems that leverage the physics of quantum mechanics in order to address problems that are hard for traditional methods to solve in a cost-effective amount of time. Examples of such problems include software verification and validation, financial risk analysis, affinity mapping and sentiment analysis, object recognition in images, medical imaging classification, compressed sensing and bioinformatics.
  • Luís F. Simões on 26 May 11
     
    According to the company's wikipedia page, the computer costs $ 10 million. Can we then declare Quantum Computing has officially arrived?! quotes from elsewhere in the site: "first commercial quantum computing system on the market"; "our current superconducting 128-qubit processor chip is housed inside a cryogenics system within a 10 square meter shielded room" Link to the company's scientific publications. Interestingly, this company seems to have been running a BOINC project, AQUA@home, to "predict the performance of superconducting adiabatic quantum computers on a variety of hard problems arising in fields ranging from materials science to machine learning. AQUA@home uses Internet-connected computers to help design and analyze quantum computing algorithms, using Quantum Monte Carlo techniques". List of papers coming out of it.
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