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Spark Core: Wi-Fi for Everything (Arduino Compatible)

A tiny Wi-Fi development board. Arduino + Wi-Fi + ARM Cortex M3 + wireless programming + REST API = awesome.

 


Via Andrea Graziano, Marty Koenig
Geofrey van Hecke's insight:

C'est un cocktail détonnant d'ingéniosité ce composent !

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Selin Carrasco's curator insight, May 11, 2013 3:40 PM

los pequeñitos vienen avanzando - raspberry? 

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Le bouclier d'invincibilité façon Star Wars, c'est (peut-être) pour bientôt

Le bouclier d'invincibilité façon Star Wars, c'est (peut-être) pour bientôt | Techno & Science | Scoop.it
La société Boeing a déposé un brevet pour un bouclier électromagnétique pour protéger les véhicules de l’onde de choc des explosions de missiles.
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46 % de la lumière convertie en électricité, record mondial pour une cellule solaire

46 % de la lumière convertie en électricité, record mondial pour une cellule solaire | Techno & Science | Scoop.it

L'Europe, championne du monde. Le vieux continent confirme sa première place dans un domaine enviable, celui de la conversion de la lumière en électricité. Le seuil était de 44,7%, il vient de passer à 46%.

Ce taux a été atteint par une cellule solaire développée conjointement par le CEA-Leti, l'entreprise française Soitec (à l'origine une émanation, justement, du CEA) et l’Institut Fraunhofer pour les Systèmes Energétiques Solaires (ISE) en Allemagne.

Des semi-conducteurs avec un meilleur rendement que le silicium

Contrairement à ces panneaux photovoltaïques qui recouvrent les toits des maisons écolos, la cellule solaire de tous les records n'est pas fabriquée en silicium. "Nous utilisons d'autres semi-conducteurs, des matériaux dits III-V", commente Thomas Signamarcheix, responsable du labo des substrats avancés du CEA-Leti. Comprenez des éléments chimiques classés dans les 3e et 5e colonnes du tableau périodique de Mendeleïev. Leur avantage : "Ils ont un rendement meilleur que le silicium", reprend le chercheur français.


Via Damoclès
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A Singing Comet

A Singing Comet | Techno & Science | Scoop.it
Rosetta’s Plasma Consortium (RPC) has uncovered a mysterious ‘song’ that Comet 67P/Churyumov-Gerasimenko is singing into space.
Geofrey van Hecke's insight:
La comète 67P chante d'une bien étrange manière. #philae2014
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Et si les routes étaient d'immenses panneaux solaires ?

Et si les routes étaient d'immenses panneaux solaires ? | Techno & Science | Scoop.it
Le projet Solar Roadways consiste à recouvrir routes, trottoirs et parkings de dalles munis de capteurs. Une campagne Indiegogo en cours compte lever 1 million de dollars.
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Sony and Panasonic Announce 300GB Archival Disc - IGN

Sony and Panasonic Announce 300GB Archival Disc - IGN | Techno & Science | Scoop.it
The two Japanese corporations claim that this will be the "new standard for professional-use, next-generation optical discs."
Geofrey van Hecke's insight:
Qui a dit que les disques appartenaient au passé ?
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A Wikipedia for robots allowing them to share knowledge and experience worldwide

A Wikipedia for robots allowing them to share knowledge and experience worldwide | Techno & Science | Scoop.it

European scientists from six institutes and two universities have developed an online platform where robots can learn new skills from each other worldwide — a kind of “Wikipedia for robots.” The objective is to help develop robots better at helping elders with caring and household tasks. “The problem right now is that robots are often developed specifically for one task”, says René van de Molengraft, TU/e researcher and RoboEarth project leader.

 

“RoboEarth simply lets robots learn new tasks and situations from each other. All their knowledge and experience are shared worldwide on a central, online database.” In addition, some computing and “thinking” tasks can be carried out by the system’s “cloud engine,” he said, “so the robot doesn’t need to have as much computing or battery power on‑board.”

 

For example, a robot can image a hospital room and upload the resulting map to RoboEarth. Another robot, which doesn’t know the room, can use that map on RoboEarth to locate a glass of water immediately, without having to search for it endlessly. In the same way a task like opening a box of pills can be shared on RoboEarth, so other robots can also do it without having to be programmed for that specific type of box.

 

RoboEarth is based on four years of research by a team of scientists from six European research institutes (TU/e, Philips, ETH Zürich, TU München and the universities of Zaragoza and Stuttgart).

 

 

Robots learn from each other on 'Wiki for robots'


Via Dr. Stefan Gruenwald
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Alzheimer : son point de départ dans le cerveau localisé

Alzheimer : son point de départ dans le cerveau localisé | Techno & Science | Scoop.it
L’imagerie par IRM fonctionnelle a permis d’identifier la zone du cerveau dans laquelle débute la maladie d’Alzheimer et comment elle se répand.
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Spermatozoïdes : quand ils entrent en compétition

Spermatozoïdes : quand ils entrent en compétition | Techno & Science | Scoop.it
Après la copulation, quand il y a plusieurs partenaires, c'est la femelle qui choisi la lignée qui la fécondera. Démonstration chez les mouches.
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PHONEBLOCKS - A Phone Worth Keeping

PHONEBLOCKS - A Phone Worth Keeping | Techno & Science | Scoop.it
Phoneblocks is a new kind of phone. Its made of blocks. Detachable blocks. To set up this platform we need to collaborate with the right companies and...
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Fabric of Reality: The origins of space and time - If space and time are not fundamental, what is?

Fabric of Reality: The origins of space and time - If space and time are not fundamental, what is? | Techno & Science | Scoop.it
Many researchers believe that physics will not be complete until it can explain not just the behaviour of space and time, but where these entities come from.

 

“Imagine waking up one day and realizing that you actually live inside a computer game,” says Mark Van Raamsdonk, describing what sounds like a pitch for a science-fiction film. But for Van Raamsdonk, a physicist at the University of British Columbia in Vancouver, Canada, this scenario is a way to think about reality. If it is true, he says, “everything around us — the whole three-dimensional physical world — is an illusion born from information encoded elsewhere, on a two-dimensional chip”. That would make our Universe, with its three spatial dimensions, a kind of hologram, projected from a substrate that exists only in lower dimensions.

 

This 'holographic principle' is strange even by the usual standards of theoretical physics. But Van Raamsdonk is one of a small band of researchers who think that the usual ideas are not yet strange enough. If nothing else, they say, neither of the two great pillars of modern physics — general relativity, which describes gravity as a curvature of space and time, and quantum mechanics, which governs the atomic realm — gives any account for the existence of space and time. Neither does string theory, which describes elementary threads of energy. Van Raamsdonk and his colleagues are convinced that physics will not be complete until it can explain how space and time emerge from something more fundamental — a project that will require concepts at least as audacious as holography.

 

But, where is the evidence that there actually is anything more fundamental than space and time? A provocative hint comes from a series of startling discoveries made in the early 1970s, when it became clear that quantum mechanics and gravity were intimately intertwined with thermodynamics, the science of heat. In 1974, most famously, Stephen Hawking of the University of Cambridge, UK, showed that quantum effects in the space around a black hole will cause it to spew out radiation as if it was hot. Other physicists quickly determined that this phenomenon was quite general. Even in completely empty space, they found, an astronaut undergoing acceleration would perceive that he or she was surrounded by a heat bath. The effect would be too small to be perceptible for any acceleration achievable by rockets, but it seemed to be fundamental. If quantum theory and general relativity are correct — and both have been abundantly corroborated by experiment — then the existence of Hawking radiation seemed inescapable.

 

A second key discovery was closely related. In standard thermodynamics, an object can radiate heat only by decreasing its entropy, a measure of the number of quantum states inside it. And so it is with black holes: even before Hawking's 1974 paper, Jacob Bekenstein, now at the Hebrew University of Jerusalem, had shown that black holes possess entropy. But there was a difference. In most objects, the entropy is proportional to the number of atoms the object contains, and thus to its volume. But a black hole's entropy turned out to be proportional to the surface area of its event horizon — the boundary out of which not even light can escape. It was as if that surface somehow encoded information about what was inside, just as a two-dimensional hologram encodes a three-dimensional image.

 

In 1995 then, Ted Jacobson, a physicist at the University of Maryland in College Park, combined these two findings, and postulated that every point in space lies on a tiny 'black-hole horizon' that also obeys the entropy–area relationship. From that, he found, the mathematics yielded Einstein's equations of general relativity — but using only thermodynamic concepts, not the idea of bending space-time. Ted's result suggested that gravity is statistical, a macroscopic approximation to the unseen constituents of space and time.

 

In 2010, this idea was taken a step further by Erik Verlinde, a string theorist at the University of Amsterdam, who showed that the statistical thermodynamics of the space-time constituents — whatever they turned out to be — could automatically generate Newton's law of gravitational attraction. In separate work, Thanu Padmanabhan, a cosmologist at the Inter-University Centre for Astronomy and Astrophysics in Pune, India, showed that Einstein's equations can be rewritten in a form that makes them identical to the laws of thermodynamics — as can many alternative theories of gravity. Padmanabhan is currently extending the thermodynamic approach in an effort to explain the origin and magnitude of dark energy: a mysterious cosmic force that is accelerating the Universe's expansion.


Via Dr. Stefan Gruenwald
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Alain Coetmeur's comment, August 31, 2013 5:56 AM
Yes, there is more and more hint that physics is ruled by information theory. 2d TD law is information law. Note that 1st TD law, is implied by 2nd TD law (give me a machine violating TD2, I build a TD1 violating machine). TD2 is heisenberg inequality. Quantum physics is based on the fact that the only reality is what you measure, ie information. Bose-einsteain inequality cliam that if something is same it is counted as one. Relativity claim that information flows below lightspeed, and that any observer is equivalent to another... finally you have informations... where does the lightspeed limit came ? is it an axiom or a consequence of symmetries... funny.
RUBEN RODRIGUEZ AMADOR's curator insight, October 17, 2013 9:58 AM

¿Qué Teoría del Espacio-Tiempo es convalida por la Física actual?

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Un cimetière de comètes entre Mars et Jupiter

Un cimetière de comètes entre Mars et Jupiter | Techno & Science | Scoop.it
Une découverte qui va ajouter de l'eau au moulin des prédicateurs d'apocalypse :-/
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Intel Awards 2013: Une adolescente invente un dispositif capable de recharger un mobile en 20s

Résidant en Californie et âgée d’à peine 18 ans, Eesha Khare vient de remporter 50 000 $ à Phoenix, lors de l’Intel Foundation Young Scientist Award 2013 pour avoir conçu un nouveau système de stockage d’énergie à très grande capacité offrant qui plus est, la capacité de recharger un mobile en une vingtaine de secondes (contrairement aux heures qui sont normalement nécessaires aujourd’hui).

 

Bien qu’il ne s’agisse encore que d’un prototype, son dispositif de petite taille et de surcroit flexible pourrait supporter jusqu’à 10 000 cycles de recharge, soit être doté d’une longévité dix fois supérieure à la moyenne actuelle.

 

“I developed a new supercapacitor, which is basically an energy storage device which can hold a lot of energy in a small amount of volume,” a-t-elle précisée.

 

Nous noterons enfin que ce super-condensateur pourra également être exploité dans le milieu de l’automobile afin de recharger les batteries de nos véhicules. En somme, une demoiselle talentueuse et modeste dont on n’a pas fini d’entendre parler. Pour en savoir plus, glissez dans la suite.

 

 


Via Damoclès
Geofrey van Hecke's insight:

Wouaw, ca va révolutionner les batteries ça !

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Ased Atlas's comment, May 21, 2013 2:06 PM
l'electricité a des lois tout comme la physique, le marketing d'Intel oublie cet aspect.
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VIDEO. 4 daltoniens voient les couleurs pour la première fois grâce à des lunettes spéciales

VIDEO. 4 daltoniens voient les couleurs pour la première fois grâce à des lunettes spéciales | Techno & Science | Scoop.it
Près de 300 millions de personnes dans le monde souffrent de daltonisme. Certaines ne font pas la différence entre le rouge et le vert, d’autres ne perçoivent que des nuances de gris.
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Voici les astéroïdes qui ont frappé la Terre ces vingt dernières années…

Voici les astéroïdes qui ont frappé la Terre ces vingt dernières années… | Techno & Science | Scoop.it
La NASA vient de rendre publique une carte issue de son Near Earth Object Program, et qui montre l'ensemble des astéroïdes de plus d'un mètre qui sont entrés en collision avec la Terre entre 1994 et 2013.

Via Goulu
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New Decentralized Crowdfunding Platform Could Reshape Bitcoin Landscape

New Decentralized Crowdfunding Platform Could Reshape Bitcoin Landscape | Techno & Science | Scoop.it
Bitcoin developer Mike Hearn is creating the decentralized 'Lighthouse' platform to fund more advanced features within the bitcoin network.
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Après le WI-FI, voici le LI-FI, la connexion qui passe à travers la lumière - YouTube

Après le WI-FI, voici le LI-FI, la connexion qui passe à travers la lumière et non pas à travers des ondes, et qui garantit un débit 150 fois plus puissant q...
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Antioxydants : ils favoriseraient le cancer du poumon

Antioxydants : ils favoriseraient le cancer du poumon | Techno & Science | Scoop.it
Une étude révèle que les antioxydants pourraient favoriser la prolifération des cellules cancéreuses. En particulier dans les cas de cancers du poumon
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EU researchers create prototype for a server-free future internet

EU researchers create prototype for a server-free future internet | Techno & Science | Scoop.it
Today’s internet is based on client devices such as PCs or smartphones talking to centralized servers to get their data. If an EU-funded project called Pursuit takes flight, the future could be a whole lot more distributed.
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Higgs boson wins Nobel physics prize

Higgs boson wins Nobel physics prize | Techno & Science | Scoop.it
Peter Higgs and Francois Englert have won the Nobel prize in physics for their work on the theory of the Higgs boson, discovered at Cern in 2012.
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"Le petit monde" - exposé de Hugues Bersini

SÉMINAIRE 2012 DE L’ERG : ENTRETIEN INFINI - ART ET SCIENCES (QUELS DIALOGUES ?) les 5, 6 et 7 mars 2012 / de 10h à 23h Halles de Schaerbeek, Bruxelles Ingénieur…
Geofrey van Hecke's insight:

Qui n'a jamais fait usage de la formule "Que le monde est petit !" en trouvant par coïncidence des connaissances communes avec l'un de ses interlocuteurs ? Derrière cette formule se trouve pourtant des explications scientifiques parfaitement tangibles.

 

Professeur à l'Université Libre de Bruxelles, chercheur et directeur du Laboratoire de Recherche en Intelligence Artificielle I.R.I.D.I.A, Hugues Bersini explique et vulgarise la théorie du petit monde.

Il explique pourquoi tous les réseaux sont profondément semblables (réseau p2p, réseau social, réseau interbancaire, etc...).

 

 

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Harry Atwater Pursues Higher Solar Power Efficiency by Combining Optical Techniques With Conventional Solar Cells | MIT Technology Review

Harry Atwater Pursues Higher Solar Power Efficiency by Combining Optical Techniques With Conventional Solar Cells  | MIT Technology Review | Techno & Science | Scoop.it
Doubling the efficiency of solar devices would completely change the economics of renewable energy. Here is a design that just might make it possible.
Geofrey van Hecke's insight:

Les labos du MIT nous prépare une nouvelle génération de cellules photovoltaïques bien plus performantes que celles dont on dispose aujourd'hui.

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Why Do Mosquitoes Bite Some People More Than Others?

Why Do Mosquitoes Bite Some People More Than Others? | Techno & Science | Scoop.it
Blood type, metabolism, exercise, shirt color and even drinking beer can make individuals especially delicious to mosquitoes. Photo by Flickr user Johan J.

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add your insight...

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Space Shuttle Thermal Tile Demonstration

Recorded this video during my KSC tour 1 day before the launch of the Atlantis Space Shuttle for STS-135, the last Space Shuttle mission. ==Updated June 3, 2...

 

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Tenir 1200 C° à bout de doigts

 

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