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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?
johannessimon81

The Universe Is Programmable. We Need an API for Everything - 3 views

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    Interesting ideas - though some metaphors are a bit far fetched. Personally, I think it could be interesting if every scientific article would also have a how-to or tutorial section that gives a recipe of how to apply the newly gained knowledge. Of course, that might be tough to do... :-)
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    The API of the world is already there (a bit), it is the previous knowledge developed by others. Open Source projects such as the wheel or the brick, allow everyday amazing new APPs to be build such as buildings and cars .... There still is merit, though, in learning from software developments techniques in the everyday world projects. This is indeed the motivation for the ACT to do work in open source (SOCIS, GSoC) and push its members to use stuff like wiki, svn, github, jenkins, and alike. This way we are performing and fostering (http://www.oxforddictionaries.com/definition/english/foster) research into working methods in the hope we will be able to export some of its benefit to the larger ESA.
Thijs Versloot

Dutch company without any managers is inspiring industry (in dutch) - 0 views

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    This dutch company, Schuberg, has no managers but instead all the employees (operating in the IT service industry) manage everything themselves. They offer IT support to KLM, Rabobank and Eneco, who are quite very reliant on the uptime of their systems. These companies rate Schuberg consistently with the highest approval. Harvard business school is now teaching this type of organizational structure. Possible new working method?
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    just like the ACT :-)
Luzi Bergamin

You know you have been in Finland too long, when... - 4 views

shared by Luzi Bergamin on 23 Jun 10 - Cached
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    How you know you have been to long in xy. The Finnish version. My favorite is 33. You accept that 80°C in a sauna is chilly, but 20°C outside is freaking hot. Quite a lot of them are outdated, esp. about opening hours of shops, and one is definitely missing. Your normal mealtime has shifted to 11am for lunch and 5pm for dinner. But don't worry, it's a really comfy place here, isnt' it Jose??
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    well somethings you get used to in a year (like salmiakki or koskenkorva) others don't (seriously, lunch at 11?!?!)
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    But what stage are you in already, Luzi?
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    I would say a 50% Finn. I do have lunch at 11am, every working day, an 80 degrees sauna indeed is just a warm room. But I will never get used to salmiakki (which is just literally eating a cleaning agent!!) and you can imagine that "silence is fun" is not really MY motto...
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    True?? 22. You understand why the Finnish language has no future tense. No, I don't think I ever will understand that one... Finns are quite future-oriented at two particular times of the year. On the day after Midsummer (see above), they say "Well, it's all downhill from now on" and prepare feverishly for winter, and similarly after December 21st they perk up and start thinking about Midsummer - ignoring the fact that they still have to get through January, February and March before the place becomes inhabitable again...
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    ... Finnish language has no future tense. That's true
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    everything expressed with "tomorrow I go to " or "in one year" etc? what about the distinction between to future events, one conditional on the other?
Juxi Leitner

Pentagon's Shape-Shifting Bot Folds Into Boat, Plane | Danger Room | Wired.com - 0 views

  • Darpa-backed electrical engineers at the two schools released the stunning results: a shape-shifting sheet of rigid tiles and elastomer joints that can fold itself into a little plane or a boat on demand.
  • In Darpa’s dreams, this work will eventually lead to everything from morphing aircraft to self-styling uniforms to a “universal spare part.”
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    haha! is this a joke...?
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    well i guess the news headline is a bit too much trying to be attractive :)
Dario Izzo

Goodbye To Google Wave - 2 views

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    I guess it never really was clear what it should do (everything?!) or what it was (they also developed server communications and APIs for loads of things) ... also: "Wave was one stab at tackling our information overload, at providing a central hub for all the information we need to deal with every day. And it will be back, in one form or another." http://www.guardian.co.uk/technology/pda/2010/aug/05/google-wave
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    I liked the concept but it was too slow .... a pity
Juxi Leitner

Slashdot Science Story | Calculating Environmental Damage From Space Tourism Rockets - 3 views

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    Cynthia - please have a look ... can we check the OoM?
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    Yeeesss :) So the "non-commercial" rockets do not emit soot? And how many "non-commercial" launches per year are there in comparison to the commercial ones? Finally commercial space-flight seems more realisable than ever, and "non-commercial" guys will do everything to prevent situation in which they have to compete on an open market... Coming years should be very interesting...
Dario Izzo

If you're going to do good science, release the computer code too!!! - 3 views

  • Les Hatton, an international expert in software testing resident in the Universities of Kent and Kingston, carried out an extensive analysis of several million lines of scientific code. He showed that the software had an unacceptably high level of detectable inconsistencies.
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    haha. this guy won't have any new friends with this article! I kind of agree but making your code public doesn't mean you are doing good science...and inversely! He takes experimental physics as a counter example but even there, some teams keep their little secrets on the details of the experiment to have a bit of advance on other labs. Research is competitive in its current state, and I think only collaborations can overcome this fact.
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    well sure competitiveness is good but to verify (and that should be the case for scientific experiments) the code should be public, it would be nice to have something like bibtex for code libraries or versions used.... :) btw I fully agree that the code should go public, I had lots of trouble reproducing (reprogramming) some papers in the past ... grr
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    My view is that the only proper way to do scientific communication is full transparency: methodologies, tests, codes, etc. Everything else should be unacceptable. This should hold both for publicly funded science (for which there is the additional moral requirement to give back to the public domain what was produced with taxpayers' money) and privately-funded science (where the need to turn a profit should be of lesser importance than the proper application of the scientifc method).
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    Same battle we are fighting since a few years....
Francesco Biscani

Pi Computation Record - 4 views

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    For Dario: the PI computation record was established on a single desktop computer using a cache optimized algorithm. Previous record was obtained by a cluster of hundreds of computers. The cache optimized algorithm was 20 times faster.
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    Teeeeheeeeheeee... assembler programmers greet Java/Python/Etc. programmers :)
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    And he seems to have done everything in his free time!!! I like the first FAQ.... "why did you do it?"
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    did you read any of the books he recommends? suggest: Modern Computer Arithmetic by Richard Brent and Paul Zimmermann, version 0.4, November 2009, Full text available here. The Art of Computer Programming, volume 2 : Seminumerical Algorithms by Donald E. Knuth, Addison-Wesley, third edition, 1998. More information here.
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    btw: we will very soon have the very same processor in the new iMac .... what record are you going to beat with it?
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    Zimmerman is the same guy behind the MPFR multiprecision floating-point library, if I recall correctly: http://www.mpfr.org/credit.html I've not read the book... Multiprecision arithmetic is a huge topic though, at least from the scientific and number theory point of view if not for its applications to engineering problems. "The art of computer programming" is probably the closest thing to a bible for computer scientists :)
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    "btw: we will very soon have the very same processor in the new iMac .... what record are you going to beat with it?" Fastest Linux install on an iMac :)
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    "Fastest Linux install on an iMac :)" that is going to be a though one but a worthy aim! ""The art of computer programming" is probably the closest thing to a bible for computer scientists :)" yep! Programming is art ;)
pacome delva

Condensation transition in networks and other complex systems - 4 views

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    I like this work... it mixes physics, networks and biology ! Anyone heard about her ? Here's an interesting paper found on this website: http://nuweb.neu.edu/gbianconi/condensation.pdf
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    Eh... Barabasi is really milking the golden cow :) It seems interesting, even if I don't remember enough from my statistical mechanics classes to truly understand it without a major effort. Maybe you could make a layman's science coffee about it?
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    yeah i could if there's enough interest...? do u know Barabasi ?
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    He's quite well known for his work on scale-free networks: http://en.wikipedia.org/wiki/Albert-L%C3%A1szl%C3%B3_Barab%C3%A1si He's applying them for everything and the kitchen sink :) We have a Barabasi-Albert network topology implemented in PaGMO...
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    We worked on this with Luzi a few years back ... while the analogy is original and interesting it fails to capture the dynamics of a network, e.g. if a network has hubs that grow and shrink .... Luzi worked on an extended model to solve this issue, but, if I remember correctly, he got stuck in a computationally very hard problem .... We intended to develop and use the extended model to define relevant characteristic of the ESA network formed by mail exchanges.....
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    ...but then the CMS YGT didn't really like the project
Nina Nadine Ridder

Stephen Wolfram: Computing a theory of everything | Video on TED.com - 2 views

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    very interesting talk by the inventor of Mathematica;  if you have 20min on you hand I recommend watching it
LeopoldS

Macroscopic invisibility cloaking of visible light : Nature Communications : Nature Pub... - 3 views

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    and all this without magic metamaterials ...
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    Wellwellwell! I don't know how I have to complain, since I could not yet read the full article, but I'm sure I will :-).
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    It's funny to see how people get more and more humble in the desperate attempt to save their stupid ideas... At the beginning was the brave and bold aim to cloak something in free space (in a sphere or a cylinder). This requires inhomogeneous, anisotropic, magnetic materials; hopeless!! So one reduces to one polarization, now we have inhomogenous, anisotropic materials; still hopeless! At this point one downgraded the pretension: instead of cloaking in free space, we make a "carpet cloak" and hide an object behind an invisible dent in a mirror. But if that shall be continuous, we still need inhomogeneity and this is very hard. So now instead of a dent we take a cone and then it is claimed to work ... for ONE polarization. But of course the cloak can't work at all incident angles... irony of fate: everything is now made from birefringent media, the antithesis of what the metamaterials dogma was at the beginning!
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    Hi Luzi, can you please send me the paper. We are writing a project based on sulfates and carbonates, and all this BS sounds great for the introduction (The authors used Calcite as birefringent material)
santecarloni

On Curing Everything § SEEDMAGAZINE.COM - 2 views

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    Kary Mullis offers a radical new way to treat infectious diseases as the effectiveness of our current antibiotics wanes
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    The thing I like about it is that, if I got it right, the last flu infection you had may safe your live once you get cancer... Similar holds for any kind of infection, as long as you got immune to a specific virus and the doctors are able to identify (and reproduce) the virus to which you are immune.
ESA ACT

Is mathematical pattern the theory of everything? - 0 views

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    Widely believed to be nonsense among serious theorists.
ESA ACT

Want to Remember Everything You'll Ever Learn? Surrender to This Algorithm - 0 views

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    any volunteers?
jmlloren

Splitting Time from Space-New Quantum Theory Topples Einstein's Spacetime - 4 views

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    This is the guy of Luzy's joke: "Dear, this is not what it seems. I can explain EVERYTHING!"
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    Horava is a serious string theorist (if there is anything like that...) I like the last comment by Dvali: if the theory can be adjusted in such a way that it becomes indistinguishable from GR then it should be taken seriously. Gosh, am I glad to be among engineers now!!!
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    yeah an interesting theory, definitely worth following. But it is far from being mature, and a lot of work remains before saying that it is viable or not... I posted something on this some time ago (http://www.diigo.com/user/pacome/horava_theory) and proposed to do smthing on it in the idea storm (our new creative game...), which didn't have a lot of success... I like also the idea of matrix gravity (see Matrix general relativity: a new look at old problems, Ivan G Avramidi, CQG 21, 103)
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    you are among what???
Francesco Biscani

What Larry Page really needs to do to return Google to its startup roots - 0 views

  • I worked at Google from 2005-2010, and saw the company go through many changes, and a huge increase in staff.  Most importantly, I saw the company go from a place where engineers were seen as violent disruptors and innovators, to a place where doing things “The Google Way” was king, and where thinking outside the box was discouraged and even chastised.
  • Let engineers do what they do best, and forget the rest.
  • This is probably the most important single point.  Engineers at Google spend way too much time fussing about with everything other than engineering and product design.
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  • Meetings.  Seriously, people are drenched in “status update” and “team” meetings.
  • Weekly Snippets, perf, etc. I was continually amazed by the amount of “extra cruft work” that goes on.  I know it sounds important, but engineers should be coding & designing.
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    An opinion piece by an ex-Googler, talking, among other things, about how corporate culture is creeping into Google. I've highlighted some snippets which I've found eerily familiar :)
johannessimon81

Rat Neurons Grown On A Computer Chip Fly A Simulated Aircraft - 1 views

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    This could become quite relevant in future control systems if the setup can be made simple to keep alive and stable. I was doing some follow-up on a story about people controlling aircraft with their brainwaves (through EEG) when I ran into this really cool story. The idea of growing the neurons in patterns is incidentally very similar to the Physarium slime-mold stuff that Dario and me were curious about a little while ago.
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    I think we already had a discussion on this during a wednesday meeting :P
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    Oh, I thought that was on the little robot that was controlled by rat neurons and bumped into EVERYTHING. The interesting thing here is that they add a surface patterning (with some kind of nutrient) to control the growth of cells. (Maybe that is not new either, though.)
anonymous

HTC Vive: Virtual Reality That's So Damn Real I Can't Even Handle It - 2 views

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    New VR headset by Valve and HTC outclasses everything else that out there. Developer kit this spring, full version by the end of the year.
Thijs Versloot

Advanced AI May Be Coming to Smartphones | MIT Technology Review - 2 views

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    Software that roughly mimics the way the brain works could give smartphones new smarts-leading to more accurate and sophisticated apps for tracking everything from workouts to emotions. The software exploits an artificial-intelligence technique known as deep learning, which uses simulated neurons and synapses to process data.
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