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hannalakk

Scientists Accidentally Invent A Brilliant Blue That Will Never Fade * Materia - 1 views

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    "But beyond its beautiful aesthetic, the pigment could help make buildings more efficient. This is because the pigment reflects a large amount of infrared light. As a result, a roof painted with YLnMn blue could help to keep buildings cool, thus conserving energy."
santecarloni

NC State News :: NC State News and Information » Researcher Finds Faster, Che... - 0 views

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    A North Carolina State University researcher has developed a more efficient, less expensive way of cooling electronic devices - particularly devices that generate a lot of heat, such as lasers and power devices.
santecarloni

Antimatter Propulsion Engine Redesigned Using CERN's Particle Physics Simulat... - 1 views

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    Latest simulation shows that the magnetic nozzles required for antimatter propulsion could be vastly more efficient than previously thought--and built with today's technologies
santecarloni

How Networks of Biological Cells Solve Distributed Computing Problems - Technology Review - 1 views

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    Computer scientists prove that networks of cells can compute as efficiently as networks of computers linked via the internet
johannessimon81

3D-solar cells much more efficient - 1 views

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    3-dimensional silicon solar cell produces at least 250% of the power of a basic silicon solar cell.
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    Any idea of the technology behind ... Sounds too much advertisement what is in the article " Now, our near term objective is to continue to improve the fabrication process and the power output, as we optimize the cost of manufacturing. We believe that the result will be a 50% reduction in the cost of solar electricity. Perhaps the installed system cost savings will be even greater"
santecarloni

Nanotube bundles could boost solar cells - physicsworld.com - 0 views

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    Thin-film solar cells could be made far more efficient with the addition of bundles of carbon nanotubes.
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    Lionel could you have a closer look at this one?
santecarloni

Breakthrough could double solar electricity ouput - latimes.com - 2 views

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    A new discovery from a chemist at the University of Texas at Austin may allow photovoltaic solar cells to double their efficiency, thus providing loads more electrical power from regular sunlight.
Lionel Jacques

Inductive charging for electric vehicles to be put to the test in real-world trial in B... - 0 views

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    The "Effizienzhaus-Plus mit Elektromobilität" (Google translation: House-Plus efficiency with electric mobility) project is a German government-backed initiative to build an energy-efficient house that generates more electricity than it consumes. It will see a family of four living in the house located in Berlin for fifteen months, starting in March 2012. Audi, BMW, Daimler, Opel and VW will each get a chance to put their respective electric vehicles to the test with each providing EVs to the house for periods of three months each.
Tom Gheysens

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

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    some biomimicry used in energy systems... maybe it sparks some ideas
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    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
annaheffernan

Solar panels perform better when listening to music - 2 views

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    Turn on Metal and they will boost their efficiency by 666%!
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    the title is at best misleading ... they add piezoelectrics into PV cells ... "manufacturing a piezoelectric material, zinc oxide nanorods, into the solar cells increased their efficiency when sound waves were played"
tvinko

Massively collaborative mathematics : Article : Nature - 28 views

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    peer-to-peer theorem-proving
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    Or: mathematicians catch up with open-source software developers :)
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    "Similar open-source techniques could be applied in fields such as [...] computer science, where the raw materials are informational and can be freely shared online." ... or we could reach the point, unthinkable only few years ago, of being able to exchange text messages in almost real time! OMG, think of the possibilities! Seriously, does the author even browse the internet?
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    I do not agree with you F., you are citing out of context! Sharing messages does not make a collaboration, nor does a forum, .... You need a set of rules and a common objective. This is clearly observable in "some team", where these rules are lacking, making team work inexistent. The additional difficulties here are that it involves people that are almost strangers to each other, and the immateriality of the project. The support they are using (web, wiki) is only secondary. What they achieved is remarkable, disregarding the subject!
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    I think we will just have to agree to disagree then :) Open source developers have been organizing themselves with emails since the early '90s, and most projects (e.g., the Linux kernel) still do not use anything else today. The Linux kernel mailing list gets around 400 messages per day, and they are managing just fine to scale as the number of contributors increases. I agree that what they achieved is remarkable, but it is more for "what" they achieved than "how". What they did does not remotely qualify as "massively" collaborative: again, many open source projects are managed collaboratively by thousands of people, and many of them are in the multi-million lines of code range. My personal opinion of why in the scientific world these open models are having so many difficulties is that the scientific community today is (globally, of course there are many exceptions) a closed, mostly conservative circle of people who are scared of changes. There is also the fact that the barrier of entry in a scientific community is very high, but I think that this should merely scale down the number of people involved and not change the community "qualitatively". I do not think that many research activities are so much more difficult than, e.g., writing an O(1) scheduler for an Operating System or writing a new balancing tree algorithm for efficiently storing files on a filesystem. Then there is the whole issue of scientific publishing, which, in its current form, is nothing more than a racket. No wonder traditional journals are scared to death by these open-science movements.
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    here we go ... nice controversy! but maybe too many things mixed up together - open science journals vs traditional journals, conservatism of science community wrt programmers (to me one of the reasons for this might be the average age of both groups, which is probably more than 10 years apart ...) and then using emailing wrt other collaboration tools .... .... will have to look at the paper now more carefully ... (I am surprised to see no comment from José or Marek here :-)
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    My point about your initial comment is that it is simplistic to infer that emails imply collaborative work. You actually use the word "organize", what does it mean indeed. In the case of Linux, what makes the project work is the rules they set and the management style (hierachy, meritocracy, review). Mailing is just a coordination mean. In collaborations and team work, it is about rules, not only about the technology you use to potentially collaborate. Otherwise, all projects would be successful, and we would noy learn management at school! They did not write they managed the colloboration exclusively because of wikipedia and emails (or other 2.0 technology)! You are missing the part that makes it successful and remarkable as a project. On his blog the guy put a list of 12 rules for this project. None are related to emails, wikipedia, forums ... because that would be lame and your comment would make sense. Following your argumentation, the tools would be sufficient for collaboration. In the ACT, we have plenty of tools, but no team work. QED
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    the question on the ACT team work is one that is coming back continuously and it always so far has boiled down to the question of how much there need and should be a team project to which everybody inthe team contributes in his / her way or how much we should leave smaller, flexible teams within the team form and progress, more following a bottom-up initiative than imposing one from top-down. At this very moment, there are at least 4 to 5 teams with their own tools and mechanisms which are active and operating within the team. - but hey, if there is a real will for one larger project of the team to which all or most members want to contribute, lets go for it .... but in my view, it should be on a convince rather than oblige basis ...
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    It is, though, indicative that some of the team member do not see all the collaboration and team work happening around them. We always leave the small and agile sub-teams to form and organize themselves spontaneously, but clearly this method leaves out some people (be it for their own personal attitude or be it for pure chance) For those cases which we could think to provide the possibility to participate in an alternative, more structured, team work where we actually manage the hierachy, meritocracy and perform the project review (to use Joris words).
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    I am, and was, involved in "collaboration" but I can say from experience that we are mostly a sum of individuals. In the end, it is always one or two individuals doing the job, and other waiting. Sometimes even, some people don't do what they are supposed to do, so nothing happens ... this could not be defined as team work. Don't get me wrong, this is the dynamic of the team and I am OK with it ... in the end it is less work for me :) team = 3 members or more. I am personally not looking for a 15 member team work, and it is not what I meant. Anyway, this is not exactly the subject of the paper.
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    My opinion about this is that a research team, like the ACT, is a group of _people_ and not only brains. What I mean is that people have feelings, hate, anger, envy, sympathy, love, etc about the others. Unfortunately(?), this could lead to situations, where, in theory, a group of brains could work together, but not the same group of people. As far as I am concerned, this happened many times during my ACT period. And this is happening now with me in Delft, where I have the chance to be in an even more international group than the ACT. I do efficient collaborations with those people who are "close" to me not only in scientific interest, but also in some private sense. And I have people around me who have interesting topics and they might need my help and knowledge, but somehow, it just does not work. Simply lack of sympathy. You know what I mean, don't you? About the article: there is nothing new, indeed. However, why it worked: only brains and not the people worked together on a very specific problem. Plus maybe they were motivated by the idea of e-collaboration. No revolution.
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    Joris, maybe I made myself not clear enough, but my point was only tangentially related to the tools. Indeed, it is the original article mention of "development of new online tools" which prompted my reply about emails. Let me try to say it more clearly: my point is that what they accomplished is nothing new methodologically (i.e., online collaboration of a loosely knit group of people), it is something that has been done countless times before. Do you think that now that it is mathematicians who are doing it makes it somehow special or different? Personally, I don't. You should come over to some mailing lists of mathematical open-source software (e.g., SAGE, Pari, ...), there's plenty of online collaborative research going on there :) I also disagree that, as you say, "in the case of Linux, what makes the project work is the rules they set and the management style (hierachy, meritocracy, review)". First of all I think the main engine of any collaboration like this is the objective, i.e., wanting to get something done. Rules emerge from self-organization later on, and they may be completely different from project to project, ranging from almost anarchy to BDFL (benevolent dictator for life) style. Given this kind of variety that can be observed in open-source projects today, I am very skeptical that any kind of management rule can be said to be universal (and I am pretty sure that the overwhelming majority of project organizers never went to any "management school"). Then there is the social aspect that Tamas mentions above. From my personal experience, communities that put technical merit above everything else tend to remain very small and generally become irrelevant. The ability to work and collaborate with others is the main asset the a participant of a community can bring. I've seen many times on the Linux kernel mailing list contributions deemed "technically superior" being disregarded and not considered for inclusion in the kernel because it was clear that
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    hey, just catched up the discussion. For me what is very new is mainly the framework where this collaborative (open) work is applied. I haven't seen this kind of working openly in any other field of academic research (except for the Boinc type project which are very different, because relying on non specialists for the work to be done). This raise several problems, and mainly the one of the credit, which has not really been solved as I read in the wiki (is an article is written, who writes it, what are the names on the paper). They chose to refer to the project, and not to the individual researchers, as a temporary solution... It is not so surprising for me that this type of work has been first done in the domain of mathematics. Perhaps I have an ideal view of this community but it seems that the result obtained is more important than who obtained it... In many areas of research this is not the case, and one reason is how the research is financed. To obtain money you need to have (scientific) credit, and to have credit you need to have papers with your name on it... so this model of research does not fit in my opinion with the way research is governed. Anyway we had a discussion on the Ariadnet on how to use it, and one idea was to do this kind of collaborative research; idea that was quickly abandoned...
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    I don't really see much the problem with giving credit. It is not the first time a group of researchers collectively take credit for a result under a group umbrella, e.g., see Nicolas Bourbaki: http://en.wikipedia.org/wiki/Bourbaki Again, if the research process is completely transparent and publicly accessible there's no way to fake contributions or to give undue credit, and one could cite without problems a group paper in his/her CV, research grant application, etc.
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    Well my point was more that it could be a problem with how the actual system works. Let say you want a grant or a position, then the jury will count the number of papers with you as a first author, and the other papers (at least in France)... and look at the impact factor of these journals. Then you would have to set up a rule for classifying the authors (endless and pointless discussions), and give an impact factor to the group...?
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    it seems that i should visit you guys at estec... :-)
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    urgently!! btw: we will have the ACT christmas dinner on the 9th in the evening ... are you coming?
pacome delva

The Coolest Antiprotons - 2 views

  • Researchers cooled a cloud of about 4,000 antiprotons down to 9 kelvin using a standard approach for cooling atoms that has never been used with charged particles or ions. The technique could provide a new way to create and trap antihydrogen, which could help researchers probe a basic symmetry of nature.
  • hydrogen and antihydrogen should share many basic traits, like mass, magnetic moment, and emission spectrum. If antihydrogen and hydrogen have even slightly different spectra, it indicates some new physics principles beyond the standard model, a very big deal.
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    antihydrogen propulsion...?
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    how to efficiently direct it?
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    didn't roger write an assessment of antimatter propulsion when he was in the ACT?
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    yeah the problem is the amount of antimatter you can get and more specifically how to trap it. I found that you would need around one gram to go to the outer Solar System. So we are far from that, but finding an efficient way to trap it, with an electromagnetic trap rather than solid walls is a first step !
Joris _

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

  • 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
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  • 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
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    a bunch of ideas, iinitiatives, and good points about upcoming changes in space ...
Luzi Bergamin

Compact metallo-dielectric optical antenna for ultra directional and enhanced radiative... - 3 views

shared by Luzi Bergamin on 26 Mar 10 - Cached
LeopoldS liked it
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    A new paper related to our old Ariadna on microstructured radiators.
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    This is actually a very nice paper in my view .... José, have a look at it!! "This study demonstrates that appropriately designed metallo-dielectric systems can serve as compact, highly directive and ultra radiative antennas. Let us emphasize that contrary to fully metallic antennas, the high directivity of this antenna does not result from a plasmonic effect, and that it is efficient over a wide range of frequencies. In consequence, the high directivity does compromise the high radiative decay rate enhancement offered by two coupled metallic particles and it is possible to exploit whispering gallery modes to further enhance the radiative decay rates. This work paves the way towards the design of compact, simple and highly efficient optical antennas."
Luís F. Simões

The Fantastical Promise of Reversible Computing  - Technology Review - 2 views

  • Reversible logic could cut the energy wasted by computers to zero. But significant challenges lie ahead.
  • By some estimates the difference between the amount of energy required to carry out a computation and the amount that today's computers actually use, is some eight orders of magnitude. Clearly, there is room for improvement.
  • There are one or two caveats, of course. The first is that nobody has succeeded in building a properly reversible logic gate so this work is entirely theoretical. But there are a number of computing schemes that have the potential to work like this. Thapliyal and Ranganathan point in particular to the emerging technology of quantum cellular automata and show how their approach might be applied.
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  • Ref: arxiv.org/abs/1101.4222: Reversible Logic Based Concurrent Error Detection Methodology For Emerging Nanocircuits
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    We did look at making computation powers more efficient from the bio perspective (efficiency of computations in brain). This paper was actually the base for our discussion on a new approsach to computing http://atlas.estec.esa.int/ACTwiki/images/6/68/Sarpeshkar.pdf and led to several ACT internal studies
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    here is the paper I told you about, on the computational power of analog computing: http://dx.doi.org/10.1016/0304-3975(95)00248-0 you can also get it here: http://www.santafe.edu/media/workingpapers/95-09-079.pdf
Luís F. Simões

Why Randomly-Selected Politicians Would Improve Democracy - Technology Review - 4 views

  • If Pluchino sounds familiar, it's because we've talked about him and his pals before in relation to the Peter Principle that incompetence always spreads through big organisations. Back in 2009, he and his buddies created a model that showed how promoting people at random always improves the efficiency of the organisation. These guys went on to win a well-deserved IgNobel prize for this work.
  • Ref: arxiv.org/abs/1103.1224: Accidental Politicians: How Randomly Selected Legislators Can Improve Parliament Efficiency
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    I think I start to understand why Italian politics does so horribly bad...
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    ... because they don't follow this rule!
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    According to the authors we have four types of people in the parlement: 1) intelligent people whose actions produce a gain for both themselves and for other people. 2) helpless/naive people in the top left quadrant whose actions produce a loss for themselves but a gain for others; 3) bandits whose actions produce a gain for themselves but a loss for other people. 4) stupid people in the bottom left quadrant produce a loss for themselves and also for other people. According to the above definition it is clear that their model does not apply to the italian parlament where we only have stupid people and bandits.
nikolas smyrlakis

Google Algorithm Predicts When Species Will Go 404, Not Found | Wired Science | Wired.com - 0 views

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    Biologists have figured out the most efficient way to destroy an ecosystem - and it's based on the Google search algorithm. Scientists have long
Joris _

Ion trap quantum computing - 0 views

  • One of the most important considerations in quantum computing is the fact that quantum computing scales polynomially, rather than exponentially, as classical computing does
  • his process would allow us to take problems of great complexity and still solve them on a humanly possible timescale. This could provide the key to modeling complex systems - especially perhaps in biology - that we can’t solve now. This would be a tremendous advantage over classical computing.
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    a follow-up question: Can quantum computer be efficient for global optimisation ?
ESA ACT

Carrier Multiplication in InAs Nanocrystal Quantum Dots with an Onset Defined by the En... - 0 views

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    Carrier multiplication (CM) is a process in which absorption of a single photon produces not just one but multiple electron-hole pairs. This effect is a potential enabler of next-generation, high-efficiency photovoltaic and photocatalytic systems.
ESA ACT

Intel Announces Winner of University Notebook Challenge - 0 views

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    Pedal Power the Healthy Solution for the Energy-Efficient Laptop of the Future
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