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LeopoldS

Tox: A New Kind of Instant Messaging - 5 views

tox.im

shared by LeopoldS on 02 Sep 14 - No Cached
  • LeopoldS on 02 Sep 14
     
    skype alternative - open source, no central server, encryption built in ....
  • ...4 more comments...
  • dejanpetkow on 04 Sep 14
     
    It's free and w/o ads. What's the business model? Their page doesn't say anything about it.
  • Thijs Versloot on 04 Sep 14
     
    To help society...
  • Ma Ru on 05 Sep 14
     
    They plan to secretly capture all communications and then sell them to NSA...
  • Paul N on 08 Sep 14
     
    probably developed by the NSA directly
  • LeopoldS on 16 Sep 14
     
    its open source - go check it :-)
  • LeopoldS on 16 Sep 14
     
    my ID: 7C53B574D888EE0E2A97FCD62B144DD14730E45C1B7158D4ED3EBCCB920CB93A68C62E6C9385
Thijs Versloot

Airbus Group Creators: Airbus Protospace - 1 views

www.airbusgroup.com/...Shooting-for-the-moon.html

shared by Thijs Versloot on 08 Jun 15 - No Cached
  • Thijs Versloot on 08 Jun 15
     
    Marc Stephens "ProtoSpace embodies agility," says Vincent Loubière. "We can move from concept to demonstrator quickly." The 'agility' method is modelled on proven successes in the computer industry but the ProtoSpace team also works with automotive and communications blue-chips, as well as start-ups whose creations could have applications in aerospace. Airbus's ACT :)
Paul N

Hacking Team Breach Shows a Global Spying Firm Run Amok | WIRED - 1 views

www.wired.com/...ws-global-spying-firm-run-amok

shared by Paul N on 08 Jul 15 - No Cached
LeopoldS liked it
  • Paul N on 08 Jul 15
     
    Few news events can unleash more schadenfreude within the security community than watching a notorious firm of hackers-for-hire become a hack target themselves. In the case of the freshly disemboweled Italian surveillance firm Hacking Team, the company may also serve as a dark example of a global surveillance industry that often sells to any government willing to pay, with little regard for that regime's human rights record. Scroll down for the commercial. :)) Funny that when I keep complaining about privacy and monitoring, people still point and laugh.
  • Alexander Wittig on 09 Jul 15
     
    And the direct link to the whole stash: https://ht.transparencytoolkit.org/ Their admin kept a plain text file with passwords on his desktop. Maybe they should have hired someone to do an audit :) More importantly, from the files it follows that this company found and exploited yet another vulnerability in Flash. So the current round of plugin/browser updates is thanks to this hack :)
  • Paul N on 09 Jul 15
     
    The vulnerability only seemed to affect some of the more recent versions. Maybe from time to time we should downgrade flash to avoid them :))
jcunha

New frequency record breaking laser in the X-ray - 0 views

www.nature.com/...nature14894.html

technology BIO science PHY

shared by jcunha on 31 Aug 15 - No Cached
  • jcunha on 31 Aug 15
     
    Good news for the imaging community: simpler and smaller x-ray sources are on the way.
Nina Nadine Ridder

Earth's extremes point the way to extraterrestrial life - 1 views

phys.org/...mes-extraterrestrial-life.html

BIO space alien_life terraforming planetary_science science

shared by Nina Nadine Ridder on 27 Aug 15 - No Cached
  • Nina Nadine Ridder on 27 Aug 15
     
    Seems a little speculative but pretty interesting thoughts. In regards to terraforming Mars this might be of interest: "During the daytime, plant-like microorganisms on a Martian-like surface could photosynthesize hydrogen peroxide. At night, when the atmosphere is relatively humid, they could use their stored hydrogen peroxide to scavenge water from the atmosphere, similar to how microbial communities in the Atacama use the moisture that salt brine extracts from the air to stay alive."
anonymous

ProtonMail - Secure email based in Switzerland - 4 views

protonmail.ch

security privacy encryption mail secure encrypted

shared by anonymous on 17 Aug 15 - No Cached
jcunha liked it
  • anonymous on 17 Aug 15
     
    Something for the e-mail privacy fighters (Leopold). Protagonist in "Mr. Robot" is using it so it must be good!
  • ...1 more comment...
  • jcunha on 18 Aug 15
     
    Seems to be very good, I am going to make one account for me.
  • LeopoldS on 19 Aug 15
     
    I have an account with them since 30 June 2014 - nice but since I don't like webmail I prefer using mail with PGP installed ... unfortunately very few others are using PGP encryption .... even smart ACT guys ... :-(
  • Paul N on 26 Aug 15
     
    We know not to use email at all for any kind of critical communication
jcunha

New methods to make longer streams of plasma with greater longevity could lead to laser-powered lightning rods - 0 views

phys.org/...er-streams-plasma-greater.html

technology PHY laser filamentation space

shared by jcunha on 25 Sep 15 - No Cached
  • jcunha on 25 Sep 15
     
    More developments in the laser filamentation community. Makes me wonder again about Christophe's ideas for a space-formed filament as new and efficient microwave waveguide.
Juxi Leitner

cubesat-space-protocol - Project Hosting on Google Code - 2 views

code.google.com/...cubesat-space-protocol

cubesat protocol data transfer api communication

shared by Juxi Leitner on 02 Jun 10 - Cached
  • Juxi Leitner on 02 Jun 10
     
    possible a simpler solution for simple spacecraft fractionation
LeopoldS

Accidenture - Funny Sales Cartoons Community - 2 views

www.funnysalescartoons.com/...accidenture-1

joke INF

shared by LeopoldS on 01 Jun 10 - Cached
  • LeopoldS on 01 Jun 10
     
    hmmm ....
jmlloren

Exotic matter : Insight : Nature - 5 views

www.nature.com/...index.html

nan phy

shared by jmlloren on 03 Aug 10 - Cached
LeopoldS liked it
  • jmlloren on 03 Aug 10
     
    Trends in materials and condensed matter. Check out the topological insulators. amazing field.
  • ...12 more comments...
  • Luzi Bergamin on 03 Aug 10
     
    Aparently very interesting, will it survive the short hype? Relevant work describing mirror charges of topological insulators and the classical boundary conditions were done by Ismo and Ari. But the two communities don't know each other and so they are never cited. Also a way to produce new things...
  • jmlloren on 04 Aug 10
     
    Thanks for noticing! Indeed, I had no idea that Ari (don't know Ismo) was involved in the field. Was it before Kane's proposal or more recently? What I mostly like is that semiconductors are good candidates for 3D TI, however I got lost in the quantum field jargon. Yesterday, I got a headache trying to follow the Majorana fermions, the merons, skyrnions, axions, and so on. Luzi, are all these things familiar to you?
  • Luzi Bergamin on 04 Aug 10
     
    Ismo Lindell described in the early 90's the mirror charge of what is now called topological insulator. He says that similar results were obtained already at the beginning of the 20th century... Ismo Lindell and Ari Sihvola in the recent years discussed engineering aspects of PEMCs (perfect electro-megnetic conductors,) which are more or less classical analogues of topological insulators. Fundamental aspects of PEMCs are well knwon in high-energy physics for a long time, recent works are mainly due to Friedrich Hehl and Yuri Obukhov. All these works are purely classical, so there is no charge quantisation, no considerations of electron spin etc. About Majorana fermions: yes, I spent several years of research on that topic. Axions: a topological state, of course, trivial :-) Also merons and skyrnions are topological states, but I'm less familiar with them.
  • LeopoldS on 04 Aug 10
     
    "Non-Abelian systems1, 2 contain composite particles that are neither fermions nor bosons and have a quantum statistics that is far richer than that offered by the fermion-boson dichotomy. The presence of such quasiparticles manifests itself in two remarkable ways. First, it leads to a degeneracy of the ground state that is not based on simple symmetry considerations and is robust against perturbations and interactions with the environment. Second, an interchange of two quasiparticles does not merely multiply the wavefunction by a sign, as is the case for fermions and bosons. Rather, it takes the system from one ground state to another. If a series of interchanges is made, the final state of the system will depend on the order in which these interchanges are being carried out, in sharp contrast to what happens when similar operations are performed on identical fermions or bosons." wow, this paper by Stern reads really weired ... any of you ever looked into this?
  • jmlloren on 04 Aug 10
     
    C'mon Leopold, it's as trivial as the topological states, AKA axions! Regarding the question, not me!
  • LeopoldS on 04 Aug 10
     
    just looked up the wikipedia entry on axions .... at least they have some creativity in names giving: "In supersymmetric theories the axion has both a scalar and a fermionic superpartner. The fermionic superpartner of the axion is called the axino, the scalar superpartner is called the saxion. In some models, the saxion is the dilaton. They are all bundled up in a chiral superfield. The axino has been predicted to be the lightest supersymmetric particle in such a model.[24] In part due to this property, it is considered a candidate for the composition of dark matter.[25]"
  • jmlloren on 04 Aug 10
     
    Thank's Leopold. Sorry Luzi for being ironic concerning the triviality of the axions. Now, Leo confirmed me that indeed is a trivial matter. I have problems with models where EVERYTHING is involved.
  • Luzi Bergamin on 04 Aug 10
     
    Well, that's the theory of everything, isn't it?? Seriously: I don't think that theoretically there is a lot of new stuff here. Topological aspects of (non-Abelian) theories became extremely popular in the context of string theory. The reason is very simple: topological theories are much simpler than "normal" and since string theory anyway is far too complicated to be solved, people just consider purely topological theories, then claiming that this has something to do with the real world, which of course is plainly wrong. So what I think is new about these topological insulators are the claims that one can actually fabricate a material which more or less accurately mimics a topological theory and that these materials are of practical use. Still, they are a little bit the poor man's version of the topological theories fundamental physicists like to look at since electrdynamics is an Abelian theory.
  • jmlloren on 04 Aug 10
     
    I have the feeling, not the knowledge, that you are right. However, I think that the implications of this light quantum field effects are great. The fact of being able to sustain two currents polarized in spin is a technological breakthrough.
  • LeopoldS on 04 Aug 10
     
    not sure how much I can contribute to your apparently educated debate here but if I remember well from my work for the master, these non-Abelian theories were all but "simple" as Luzi puts it ... and from a different perspective: to me the whole thing of being able to describe such non-Abelian systems nicely indicates that they should in one way or another also have some appearance in Nature (would be very surprised if not) - though this is of course no argument that makes string theory any better or closer to what Luzi called reality ....
  • Luzi Bergamin on 04 Aug 10
     
    Well, electrodynamics remains an Abelian theory. From the theoretical point of view this is less interesting than non-Abelian ones, since in 4D the fibre bundle of a U(1) theory is trivial (great buzz words, eh!) But in topological insulators the point of view is slightly different since one always has the insulator (topological theory), its surrounding (propagating theory) and most importantly the interface between the two. This is a new situation that people from field and string theory were not really interested in.
  • Dario Izzo on 04 Aug 10
     
    guys... how would you explain this to your gran mothers?
  • jmlloren on 05 Aug 10
  • LeopoldS on 07 Aug 10
     
    *you* tried *your* best .... ??
Dario Izzo

Goodbye To Google Wave - 2 views

techcrunch.com/...wave-goodbye-to-google-wave

INF

shared by Dario Izzo on 05 Aug 10 - Cached
  • Juxi Leitner on 05 Aug 10
     
    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
  • LeopoldS on 07 Aug 10
     
    I liked the concept but it was too slow .... a pity
Juxi Leitner

Run Wired, Run Deep: Subs May Finally Get Online | Danger Room | Wired.com - 1 views

www.wired.com/...1

INF technology space connectivity internet real-time communication

shared by Juxi Leitner on 05 Aug 10 - Cached
  • LeopoldS on 07 Aug 10
     
    strange that even if optical fibre this would not compromise the submarines location ...
Joris _

NASA's next destination: a near-Earth asteroid? | National | Chron.com - Houston Chronicle - 0 views

www.chron.com/...7188211.html

NEO Human_Exploration

shared by Joris _ on 07 Sep 10 - No Cached
  • At a workshop last month in Washington, D.C., NASA canvassed the scientific, human spaceflight and planetary defense communities about their priorities for a mission to a near-Earth asteroid.
  • an asteroid mission is possible as early as 2019 using a pair of enhanced Orion spacecraft with a two-person crew.
  • November 2019 and spend three months flying more than 7 million miles to an asteroid that's about 33 feet across.
  • ...2 more annotations...
  • he crew would "park" their vehicle nearby and spacewalk over
  • After about five days the crew would climb back into one of the capsules and spend three months flying home.
Juxi Leitner

TED Talk: The roots of plant intelligence [video] - Holy Kaw! - 3 views

holykaw.alltop.com/ots-of-plant-intelligence-vide

plant intelligence BIO technology AI

shared by Juxi Leitner on 12 Oct 10 - No Cached
LeopoldS liked it
  • Nicholas Lan on 14 Oct 10
     
    even being so used to italians that accent is hilarious
  • ...1 more comment...
  • LeopoldS on 14 Oct 10
     
    this video is fantastic!! reminds me a lot of a discussion we had in the team some years ago on the communication of fungus ....
  • LeopoldS on 14 Oct 10
     
    how comes that they did not apply to our Ariadna?
  • LeopoldS on 14 Oct 10
     
    maybe we should have a second look at multiple roots as networks
Joris _

Is It Time To Revamp Systems Engineering? | AVIATION WEEK - 1 views

www.aviationweek.com/...story.jsp

engineering

shared by Joris _ on 02 Nov 10 - No Cached
LeopoldS liked it
  • They both believe the systems engineering processes that have served the aerospace and defense community since pre-Apollo days are no longer adequate for the large and complex systems ­industry is now developing.
  • Joris _ on 02 Nov 10
     
    1) it has to actively work and produce a result that's what you intended 2) the design must be robust. 3) it should be efficient 4) it should minimize unintended consequences. "But we have to establish a formal, mathematically precise mechanism to measure complexity and adaptability . . . [where] adaptability means the system elements have sufficient margin, and can serve multiple purposes." "We need to break the paradigm of long cycles from design to product" some interesting questions....
  • ...1 more comment...
  • LeopoldS on 02 Nov 10
     
    indeed ... already hotly debated in CDF ... any suggestions in addition to what we already contributed to this (e.g. system level optimisation)
  • Joris _ on 03 Nov 10
     
    what is the outcome of the CDF study ? I think actually that optimisation is not at all the key point. As it is stressed in this news, it is robustness (points 2 and 4). This is something we should think about ...
  • Luzi Bergamin on 03 Nov 10
     
    SYSTEM OF SYSTEMS, SYSTEM OF SYSTEMS!!! :-D
Dario Izzo

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

www.guardian.co.uk/...ce-climate-emails-code-release

open science

shared by Dario Izzo on 09 Feb 10 - Cached
pacome delva liked it
  • 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.
  • pacome delva on 09 Feb 10
     
    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.
  • ...1 more comment...
  • Juxi Leitner on 10 Feb 10
     
    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
  • Francesco Biscani on 10 Feb 10
     
    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).
  • Dario Izzo on 08 Nov 10
     
    Same battle we are fighting since a few years....
Joris _

Earth's atmosphere came from outer space, find scientists - 3 views

www.physorg.com/news179676765.html

climate research space

shared by Joris _ on 11 Dec 09 - Cached
  • From that we now know that the volcanic gases could not have contributed in any significant way to the Earth's atmosphere
  • LeopoldS on 11 Dec 09
     
    tried to find the original science paper but could not .... the only one I found was this one: http://sciencenow.sciencemag.org/cgi/content/full/2009/1210/2
  • ...1 more comment...
  • Nina Nadine Ridder on 11 Dec 09
  • nikolas smyrlakis on 14 Dec 09
     
    "Plan 9 from outer space" quote confirmed : atmospheric conditions in outer space stall communications! Wonder how many more facts of the movie will prove right in the end...
  • pacome delva on 14 Dec 09
     
    very interesting study. Although it is not so much a surprise, they cite many papers on planetary formation that predicted this, and the only paper on degassing they cite is from our rather unpopular french ex-minister of research c. allegre, who refuses the fact that humans have an impact on climate...
Francesco Biscani

Official Google Blog: Announcing Google's Focused Research Awards - 0 views

googleblog.blogspot.com/...-googles-focused-research.html

inf

shared by Francesco Biscani on 02 Feb 10 - Cached
  • Today, we're announcing the first-ever round of Google Focused Research Awards — funding research in areas of study that are of key interest to Google as well as the research community. These awards, totaling $5.7 million, cover four areas: machine learning, the use of mobile phones as data collection devices for public health and environment monitoring, energy efficiency in computing, and privacy.
  • Francesco Biscani on 02 Feb 10
     
    Might be of some interest to Christos?
Francesco Biscani

What Should We Teach New Software Developers? Why? | January 2010 | Communications of the ACM - 3 views

cacm.acm.org/...fulltext

inf

shared by Francesco Biscani on 15 Jan 10 - Cached
Dario Izzo liked it
  • Industry wants to rely on tried-and-true tools and techniques, but is also addicted to dreams of "silver bullets," "transformative breakthroughs," "killer apps," and so forth.
  • This leads to immense conservatism in the choice of basic tools (such as programming languages and operating systems) and a desire for monocultures (to minimize training and deployment costs).
  • The idea of software development as an assembly line manned by semi-skilled interchangeable workers is fundamentally flawed and wasteful.
  • Francesco Biscani on 15 Jan 10
     
    Nice opinion piece by the creator of C++ Bjarne Stroustrup. Substitute "industry" with "science" and many considerations still apply :)
  • Juxi Leitner on 18 Jan 10
     
    "for many, "programming" has become a strange combination of unprincipled hacking and invoking other people's libraries (with only the vaguest idea of what's going on). The notions of "maintenance" and "code quality" are typically forgotten or poorly understood. " ... seen so many of those students :( and ad "My suggestion is to define a structure of CS education based on a core plus specializations and application areas", I am not saying the austrian university system is good, but e.g. the CS degrees in Vienna are done like this, there is a core which is the same for everybody 4-5 semester, and then you specialise in e.g. software engineering or computational mgmt and so forth, and then after 2 semester you specialize again into one of I think 7 or 8 master degrees ... It does not make it easy for industry to hire people, as I have noticed, they sometimes really have no clue what the difference between Software Engineering is compared to Computational Intelligence, at least in HR :/
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