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jcunha

Training and operation of an integrated neural network based on memristors - 0 views

www.nature.com/...nature14441.html

NAN science technology memristor AI neuromorphic

shared by jcunha on 07 May 15 - No Cached
LeopoldS liked it
  • jcunha on 07 May 15
     
    Almost in time for the workshop last week! This new Nature paper (e-mail me for full paper) claims training and usage of neural network implemented with metal-oxide memristors, without selector CMOS. They used it to implement a delta-rule algorithm for classification of 3x3 pixel black and white letters. Very impressive work!!!!
  • jcunha on 07 May 15
     
    For those not that much into the topic, see the Nature's News and View section www.nature.com/nature/journal/v521/n7550/full/521037a.html?WT.ec_id=NATURE-20150507 where they feature this article.
Alexander Wittig

Picture This: NVIDIA GPUs Sort Through Tens of Millions of Flickr Photos - 2 views

blogs.nvidia.com/...flickr

AI

shared by Alexander Wittig on 21 Jul 15 - No Cached
LeopoldS liked it
  • Alexander Wittig on 21 Jul 15
     
    Strange and exotic cityscapes. Desolate wilderness areas. Dogs that look like wookies. Flickr, one of the world's largest photo sharing services, sees it all. And, now, Flickr's image recognition technology can categorize more than 11 billion photos like these. And it does it automatically. It's called "Magic View." Magical deep learning! Buzzword attack!
  • ...4 more comments...
  • LeopoldS on 21 Jul 15
     
    and here comes my standard question: how can we use this for space? fast detection of natural disasters onboard?
  • Alexander Wittig on 22 Jul 15
     
    Even on ground. You could for example teach it what nuclear reactors or missiles or other weapons you don't want look like on satellite pictures and automatically scan the world for them (basically replacing intelligence analysts).
  • Alexander Wittig on 23 Jul 15
     
    In fact, I think this could make a nice ACT project: counting seals from satellite imagery is an actual (and quite recent) thing: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0092613 In this publication they did it manually from a GeoEye 1 b/w image, which sounds quite tedious. Maybe one can train one of those image recognition algorithms to do it automatically. Or maybe it's a bit easier to count larger things, like elephants (also a thing).
  • jcunha on 23 Jul 15
     
    In HiPEAC (High Performance, embedded architecture and computation) conference I attended in the beginning of this year there was a big trend of CUDA GPU vs FPGA for hardware accelerated image processing. Most of it orbitting around discussing who was faster and cheaper with people from NVIDIA in one side and people from Xilinx and Intel in the other. I remember of talking with an IBM scientist working on hardware accelerated data processing working together with the Radio telescope institute in Netherlands about the solution where they working on (GPU CUDA). I gathered that NVIDIA GPU suits best in applications that somehow do not rely in hardware, having the advantage of being programmed in a 'easy' way accessible to a scientist. FPGA's are highly reliable components with the advantage of being available in radhard versions, but requiring specific knowledge of physical circuit design and tailored 'harsh' programming languages. I don't know what is the level of rad hardness in NVIDIA's GPUs... Therefore FPGAs are indeed the standard choice for image processing in space missions (a talk with the microelectronics department guys could expand on this), whereas GPUs are currently used in some ground based (radio astronomy or other types of telescopes). I think that on for a specific purpose as the one you mentioned, this FPGA vs GPU should be assessed first before going further.
  • Paul N on 29 Jul 15
     
    You're forgetting power usage. GPUs need 1000 hamster wheels worth of power while FPGAs can run on a potato. Since space applications are highly power limited, putting any kind of GPU monster in orbit or on a rover is failed idea from the start. Also in FPGAs if a gate burns out from radiation you can just reprogram around it. Looking for seals offline in high res images is indeed definitely a GPU task.... for now.
  • jcunha on 31 Jul 15
     
    The discussion of how to make FPGA hardware acceleration solutions easier to use for the 'layman' is starting btw http://reconfigurablecomputing4themasses.net/.
jcunha

Interference of thermal waves - Can heat be controlled as waves? - 1 views

phys.org/...can-heat-be-controlled-as.html

technology PHY solid state thermal management science

shared by jcunha on 26 Jun 15 - No Cached
  • jcunha on 26 Jun 15
     
    Imagine a material that only admits thermal conduction for certain temperatures. Martin Maldovan from Georgia Tech holds a tiny thermoelectric device that turns cold on one side when current is applied. Recent research has focused on the possibility of using interference effects in phonon waves to control heat transport in materials. These are exciting news (see Nature Materials paper here http://www.nature.com/nmat/journal/v14/n7/full/nmat4308.html). Heterostructure research lead to outstanding new possibilities when applied to electronic transport (e.g. in quantum well and quantum dots) and to photonics (e.g. Quantum Cascade Laser tunnable lasers). Apparently the time has come to see selective thermal control in this way! Truly exciting!!
Francesco Biscani

California libraries gearing up for fight against Nature - 2 views

arstechnica.com/...p-for-fight-against-nature.ars

shared by Francesco Biscani on 09 Jun 10 - Cached
  • The library system of the University of California may call upon the schools' faculty to boycott journals originating from the Nature Publishing Group if they can't come to an agreement on licensing costs for journal access.
  • Francesco Biscani on 09 Jun 10
     
    It will be interesting to see how this will develop.
  • Ma Ru on 09 Jun 10
     
    "Nature will find a way", I guess
duncan barker

Challenging Existence of 'Absolute Time' - 3 views

www.21stcenturysciencetech.com/...time.html

phy

shared by duncan barker on 12 Aug 10 - Cached
  • Luzi Bergamin on 12 Aug 10
     
    I doubt that Shnoll is really the first one making such experiments, but perhaps they are more complete than any others done before. Similar things are very popular in the context of Psychology and more exotic fields. If I remember correctly someone ran long experiments with random number generators... Mostly the stories died after a short time, since the experiments are not reproducable. Anyway, why do these guys always have to claim that their work is somehow fundamentally changing our view of physics, notoriously referring to Einstein-Bohr debates and this stuff. That's nonsense! If these effects exist the first explanation is always much simpler. There is somewhere something that influences physics on Earth in a defined way. But this influence depends on the relative position or whatever of the Earth to that whatever-it-is. No problem with absolute time and all that sh...
  • LeopoldS on 12 Aug 10
     
    Two years ago, nearly unnoticed in the West, the Russian biophysicist S.E. Shnoll published a paper in the prominent Russian physics journal Uspekhi Fisicheskikh Nauk ..... ah then ...
  • Luzi Bergamin on 12 Aug 10
     
    You are right, Leo, they are mostly Russians that publish in some unspellable Journals nobody knows.... or then they are supported by Templeton Foundation.
Giusi Schiavone

The importance of stupidity in scientific research. - 10 views

jcs.biologists.org/...1771

shared by Giusi Schiavone on 07 Sep 10 - Cached
  • Giusi Schiavone on 07 Sep 10
     
    I suggest you this easy reading ( is on a peer-reviewed scientific journal, IF = 6.14) 'We just don't know what we're doing!!!'
  • ...2 more comments...
  • LeopoldS on 08 Sep 10
     
    as a start of a peer reviewed paper this is an interesting first paragraph: "I recently saw an old friend for the first time in many years. We had been Ph.D. students at the same time, both studying science, although in different areas. She later dropped out of graduate school, went to Harvard Law School and is now a senior lawyer for a major environmental organization. At some point, the conversation turned to why she had left graduate school. To my utter astonishment, she said it was because it made her feel stupid. After a couple of years of feeling stupid every day, she was ready to do something else."
  • Ma Ru on 08 Sep 10
     
    Hilarious! Mr Schwartz, who made a PhD at Stanford(!) and apparently is working as a postdoc now, has finally discovered what science is about!!! Quote: "That's when it hit me: nobody did. That's why it was a research problem." And he seems so excited about it! I think he should not only get published in 6.14 journal, but also get the Nobel Prize immediately! Seriously, after reading something like this, how one may not have superstitions about the educational system in the US?
  • LeopoldS on 10 Sep 10
     
    I tend to agree with you but I think that you are too harsh - its still only an "essay" and one of his points of making sure that education at post graduate level is not about indoctrinating what we know already is valid ...
  • Francesco Biscani on 20 Sep 10
     
    I think this quote by Richard Horton is relevant to the discussion: "We portray peer review to the public as a quasi-sacred process that helps to make science our most objective truth teller. But we know that the system of peer review is biased, unjust, unaccountable, incomplete, easily fixed, often insulting, usually ignorant, occasionally foolish, and frequently wrong." :P
LeopoldS

Comparison of Two GaN Transistor Technologies in Broadband Power Amplifiers  ... - 1 views

www.mwjournal.com/...article.asp

technology NRG wireless WPT

shared by LeopoldS on 10 Oct 10 - No Cached
  • LeopoldS on 10 Oct 10
     
    interesting paper for wireless energy transmission ... Duncan have a look ...
  • duncan barker on 11 Oct 10
     
    Yeah, its nice to see some research into semiconductors which aren't silicon. This paper would be useful for us if we wanted to do a study of the efficiency of the DC to microwave conversion systems for SPS.
Joris _

American Institute of Aeronautics and Astronautics - New Horizons Challenge - 5 views

www.aiaa.org/content.cfm

shared by Joris _ on 16 Nov 10 - No Cached
Juxi Leitner liked it
  • Joris _ on 16 Nov 10
     
    the ACT should participate, a least someone in it, ...
  • LeopoldS on 16 Nov 10
     
    seems as if they are lacking ideas ?? :-) and honestly: "The Grand Prize Winner will be announced 6 January and will receive $500 plus a one year, on-line subscription to the AIAA Journal of their choice. Two runner-up winners will each receive $250 and a one year, on-line subscription to the AIAA Journal of their choice." ... :-)
pacome delva

[1012.1194] Does an atom interferometer test the gravitational redshift at the Compton ... - 0 views

fr.arxiv.org/1012.1194

phy atom_interferometry general_relativity

shared by pacome delva on 07 Dec 10 - No Cached
  • pacome delva on 07 Dec 10
     
    Here is a probably definite answer to the strong polemics around the test of gravitational redshift with atom interferometers, which would be far better than the one done by ACES/PHARAO. Read the abstract it's very ACT like, Luzi should like it :) The original Nature paper is the one of Muller, Peters and Chu (the nobel and secretary of energy in the US): http://www.nature.com/nature/journal/v463/n7283/full/nature08776.html
LeopoldS

Socialism in soil? The importance of mycorrhizal fungal networks for facilitation in na... - 0 views

www3.interscience.wiley.com/...abstract

BIO

shared by LeopoldS on 24 Dec 09 - No Cached
  • LeopoldS on 24 Dec 09
     
    see my comment before ... nice paper ...
pacome delva

Philosophers' Imprint - 5 views

quod.lib.umich.edu/...text-idx

philosophy phy math

shared by pacome delva on 18 Jan 10 - Cached
Nicholas Lan liked it
  • pacome delva on 18 Jan 10
     
    An interesting (free) journal on philosophy, with even some article with mathematics and physics !
  • Luzi Bergamin on 18 Jan 10
     
    Reading the titles somehow reminds me of the most important webpage of the ACT: the Advanced Concepts Generator :-)
  • pacome delva on 18 Jan 10
     
    have you seen the 2 articles on canonical GR ...!
Isabelle DB

Global Warning - a project of the National Security Journalism Initiative - 0 views

global-warning.org/main

Arctic Climate Change Global Warming and Security Environment Energy Youth Students Water Military

shared by Isabelle DB on 12 Jan 11 - No Cached
  • Isabelle DB on 12 Jan 11
     
    "WASHINGTON, D.C. - In a three-month investigation, a team of Northwestern University student reporters has found that the US nation's security establishment is not adequately prepared for many of the environmental changes that are coming faster than predicted and that threaten to reshape demands made on the military and intelligence community. This is despite the fact that the Defense Department has called climate change a potential "accelerant of instability." The Medill School of Journalism graduate student team began publication on January 10 of its findings on the national security implications of climate change with a series of print, video and interactive stories."
Luís F. Simões

Seminar: You and Your Research, Dr. Richard W. Hamming (March 7, 1986) - 10 views

www.chris-lott.org/...kaiser.html

science research Methods methodology Nobel Bell Labs Los Alamos

shared by Luís F. Simões on 07 Jan 11 - Cached
LeopoldS liked it
  • This talk centered on Hamming's observations and research on the question "Why do so few scientists make significant contributions and so many are forgotten in the long run?" From his more than forty years of experience, thirty of which were at Bell Laboratories, he has made a number of direct observations, asked very pointed questions of scientists about what, how, and why they did things, studied the lives of great scientists and great contributions, and has done introspection and studied theories of creativity. The talk is about what he has learned in terms of the properties of the individual scientists, their abilities, traits, working habits, attitudes, and philosophy.
  • Luís F. Simões on 07 Jan 11
     
    Here's the link related to one of the lunch time discussions. I recommend it to every single one of you. I promise it will be worth your time. If you're lazy, you have a summary here (good stuff also in the references, have a look at them):      Erren TC, Cullen P, Erren M, Bourne PE (2007) Ten Simple Rules for Doing Your Best Research, According to Hamming. PLoS Comput Biol 3(10): e213.
  • ...3 more comments...
  • pacome delva on 11 Jan 11
     
    I'm also pretty sure that the ones who are remembered are not the ones who tried to be... so why all these rules !? I think it's bullshit...
  • Luís F. Simões on 11 Jan 11
     
    The seminar is not a manual on how to achieve fame, but rather an analysis on how others were able to perform very significant work. The two things are in some cases related, but the seminar's focus is on the second.
  • pacome delva on 12 Jan 11
     
    Then read a good book on the life of Copernic, it's the anti-manual of Hamming... he breaks all the rules !
  • LeopoldS on 12 Jan 11
     
    honestly I think that some of these rules actually make sense indeed ... but I am always curious to get a good book recommendation (which book of Copernic would you recommend?) btw Pacome: we are in Paris ... in case you have some time ...
  • pacome delva on 12 Jan 11
     
    I warmly recommend this book, a bit old but fascinating: The sleepwalkers from Arthur Koestler. It shows that progress in science is not straight and do not obey any rule... It is not as rational as most of people seem to believe today. http://www.amazon.com/Sleepwalkers-History-Changing-Universe-Compass/dp/0140192468/ref=sr_1_1?ie=UTF8&qid=1294835558&sr=8-1 Otherwise yes I have some time ! my phone number: 0699428926 We live around Denfert-Rochereau and Montparnasse. We could go for a beer this evening ?
santecarloni

Breakthrough Propulsion Physics - 7 views

www.grc.nasa.gov/bpp

propulsion physics space

shared by santecarloni on 26 Jan 11 - Cached
  • santecarloni on 26 Jan 11
     
    The competition is open....
  • Luzi Bergamin on 26 Jan 11
     
    And what does one win in the end? Yet another unfeasible concept to be archived somewhere in a journal? Look at "Millis hypothetical drives"... Give me a break, for sure!!
  • Dario Izzo on 26 Jan 11
     
    I like the sentence "16 peer-reviewed journal articles, and an award-winning website (Warp-When), all for a total investment of less than $1.6M". This gives 100.000 dollars per peer-reviewed paper (we neglect the award-winning web-site under the assumption that is the easy part....). With these number the ACT in 2010 cashed 1.4 millions only in research papers making it an obvious good investment for the European Space Agency also in austerity times!!!
pandomilla

Bioinspired self-repairing slippery surfaces with pressure-stable omniphobicity : Natur... - 3 views

www.nature.com/...nature10447.html

biomimetics plant self-repairing

shared by pandomilla on 22 Sep 11 - No Cached
LeopoldS liked it
  • a strategy to create self-healing, slippery liquid-infused porous surface(s) (SLIPS) with exceptional liquid- and ice-repellency, pressure stability and enhanced optical transparency. Our approach—inspired by Nepenthes pitcher plants13—is conceptually different from the lotus effect, because we use nano/microstructured substrates to lock in place the infused lubricating fluid. We define the requirements for which the lubricant forms a stable, defect-free and inert ‘slippery’ interface.
  • ts capability to repel various simple and complex liquids (water, hydrocarbons, crude oil and blood),
  • pandomilla on 22 Sep 11
     
    ...This slippery surface was bio-inspired by the carnivorous plant I showed you sometimes ago! I was sure it was a good idea! next time I will be quicker!!
  • ...1 more comment...
  • LeopoldS on 22 Sep 11
     
    Shit. I am sure that there is more to do on this. Let's have a closer look.
  • LeopoldS on 22 Sep 11
     
    And a good lesson that it is important to proceed quickly when you have an idea and don't wait ...
  • pandomilla on 23 Sep 11
     
    Yes, I will see what we could do, but they really did a good job, from the biomimetic of the surface, up to the realization of the material, and the tests...
Luís F. Simões

Nature Publishing Group announces a ban on human authorship - 3 views

www.nature.com/...477244a.html

AI

shared by Luís F. Simões on 12 Sep 11 - No Cached
  • Nature Publishing Group announced today that its flagship journal, Nature, will no longer accept submissions from humans (Homo sapiens)
ESA ACT

Scaling theory for information networks - Journal Article - 0 views

journals.royalsociety.org/...c7v0v823m44663t6

BIO INF AI paper Information network scaling

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    This is an article that examines information network both enigneered and evolved ones. The find striking similarities and examine the differences.
ESA ACT

JoVE: Journal of Visualized Experiments - Biological Experiments and Protocols on Video - 0 views

www.jove.com/main.stp

BIO paper Video training journal experiment

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Amazing: you can now publish lecture videos of experiments and special techniques.
ESA ACT

Royal Society Publishing - J. R. Soc. Interface (2004-) - First Cite - Electron tomogra... - 0 views

journals.royalsociety.org/...d788p7266u156210

bio nan Photonics

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Characterizin bionanophotonic structures
ESA ACT

New holographic method could be used for lab-on-a-chip technologies - 0 views

news.uns.purdue.edu/...081202WereleyREP.html

NAN

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    Worth looking into? Can anyone get a copy of the paper?: http://www.rsc.org/publishing/journals/LC/article.asp?doi=b810787d
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