Sciences & Technology
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Vers un générateur universel fonctionnant à l'électricité statique ?

Vers un générateur universel fonctionnant à l'électricité statique ? | Sciences & Technology | Scoop.it

"(AFP) - Produire de l'électricité bon marché à partir d'un simple mouvement du corps, d'un souffle de vent ou d'un robinet ? Cela pourrait devenir une réalité grâce à un prototype de générateur qui exploite l'électricité statique, présenté mardi par des chercheurs chinois.

Le fonctionnement de ce générateur repose sur la "triboélectricité", l'électricité produite par le frottement de deux matériaux, qui permet par exemple à un ballon de se charger électriquement pour adhérer à un mur après avoir été frotté contre un pull en laine..."

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AquaCell : La pile écologique chargeable à l'eau en 5 minutes

AquaCell : La pile écologique chargeable à l'eau en 5 minutes | Sciences & Technology | Scoop.it

"Écologique et économique, les piles AquaCell représentent une véritable révolution dans ce secteur. [...]

Voici l’avènement de la pile chinoise Aquacell, l’invention de Niels Bakker, un Hollandais vivant à Hong Kong. Une pile nouvelle génération qui se charge à l’eau grâce à une réaction chimique qu’on nomme "électrolyse".

Il suffit de prendre vos piles Aquacell, de dévisser l’embout en plastique fait de maïs recyclé, de les tremper 5 minutes dans de l’eau, de laisser l’eau stimuler les ions négatifs et positifs qui sont à l’intérieur des piles sous forme de poudres organiques non toxiques, pour créer la tension et donc le courant..."

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Don’t Look Now, But Your Next EV Battery Could Look Like A Pomegranate

Don’t Look Now, But Your Next EV Battery Could Look Like A Pomegranate | Sciences & Technology | Scoop.it

"Lithium-ion batteries have been the gold standard for powering electric vehicles, but with fuel cells breathing down their necks, the pressure is on to come up with next-generation performance improvements. A team of researchers has come up with a solution based on the structure of a pomegranate, which could combine greater efficiency with commercial-scale durability..."

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50 images scientifiques extraordinaires, le voyage continue !

50 images scientifiques extraordinaires, le voyage continue ! | Sciences & Technology | Scoop.it
La dernière sélection semble avoir plu, alors j'ai pris le temps de rassembler ici 50 nouvelles images extraordinaires, toujours en rapport avec la science. J'ai essayé de brouiller les pistes en faisant des transitions hasardeuses et en variant l...

Via Goulu
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L’impact de l’impression 3D sur la supply chain

L’impact de l’impression 3D sur la supply chain | Sciences & Technology | Scoop.it

Via GCX France Canada, Jean-Pierre Blanger
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Arecibo Observatory Undergoing Emergency Repairs After Earthquake Causes Damage

Arecibo Observatory Undergoing Emergency Repairs After Earthquake Causes Damage | Sciences & Technology | Scoop.it
The Arecibo Observatory’s 305 meter (1,000 ft) radio telescope is undergoing emergency repair after being damaged during a 6.4 magnitude earthquake on January 13, 2014. A large cable that supports the telescope's receiver platform had “serious damage,” according to Bob Kerr, the Director of the Arecibo Observatory. “A protocol structural survey following the January 13…
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Fantastic Voyage: Nanomotors are inserted and controlled, for the first time, inside living cells

Fantastic Voyage: Nanomotors are inserted and controlled, for the first time, inside living cells | Sciences & Technology | Scoop.it

For the first time anywhere, a team of chemists and engineers at Penn State has placed tiny synthetic motors inside live human cells, propelled them with ultrasonic waves and steered them magnetically. It's not exactly "Fantastic Voyage," but it's close. The nanomotors, which are rocket-shaped metal particles, move around inside the cells, spinning and battering against the cell membrane.

 

"As these nanomotors move around and bump into structures inside the cells, the live cells show internal mechanical responses that no one has seen before," said Tom Mallouk, Evan Pugh Professor of Materials Chemistry and Physics. "This research is a vivid demonstration that it may be possible to use synthetic nanomotors to study cell biology in new ways. We might be able to use nanomotors to treat cancer and other diseases by mechanically manipulating cells from the inside. Nanomotors could perform intracellular surgery and deliver drugs noninvasively to living tissues."

 

Up until now, Mallouk said, nanomotors have been studied only "in vitro" in a laboratory apparatus, not in living human cells. Chemically powered nanomotors were first developed 10 years ago at Penn State by a team that included chemist Ayusman Sen and physicist Vincent Crespi, in addition to Mallouk.

 

"Our first-generation motors required toxic fuels and they would not move in biological fluid, so we couldn't study them in human cells," Mallouk said. "That limitation was a serious problem." When Mallouk and French physicist Mauricio Hoyos discovered that nanomotors could be powered by ultrasonic waves, the door was open to studying the motors in living systems.

 


Via Dr. Stefan Gruenwald, Lynnette Van Dyke
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2020 : le triomphe des robots…

2020 : le triomphe des robots… | Sciences & Technology | Scoop.it
Il y a deux semaines, j’avais évoqué, dans mon éditorial consacré au Consumer Electronics Show de Las Vegas, l’explosion de la robotique professionnelle, éducative et personnelle qui a marqué ce grand salon mondial des technologies numériques.

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DARPA funds IBM development of chip that will self-destruct

DARPA funds IBM development of chip that will self-destruct | Sciences & Technology | Scoop.it

To ensure enemies can’t capture tech, DARPA wants chip that turns to dust.

The Defense Advanced Research Projects Agency has awarded a contract to IBM to create a CMOS chip that will self-destruct on command, turning into silicon dust. The goal of the project, called Vanishing Programmable Resources (VAPR), is to develop technologies that would prevent classified military systems from falling into unfriendly hands..."

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Ces gènes que Néandertal nous a légués

Ces gènes que Néandertal nous a légués | Sciences & Technology | Scoop.it
Selon des études, si sur le plan individuel, l'héritage de Néandertal ne dépasse pas 3 % de nos gènes, au total 20 % du génome de l'homme de Néandertal subsisterait éparpillé dans l'ADN des populations modernes.
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Le borophène devient un possible concurrent du graphène

Le borophène devient un possible concurrent du graphène | Sciences & Technology | Scoop.it

"Des chercheurs de l’université Brown aux États-Unis viennent de démontrer qu’une feuille d’une épaisseur d'un atome de bore était possible. Leurs résultats ont été publiés dans la revue Nature Communications. Concrètement, ils ont réussi à arranger 36 atomes de bore ensemble, montrant que les modèles théoriques établis par la communauté scientifique avant leur expérience étaient corrects. Ce n’est pas un borophène, mais on s’y approche..."

 

English article : http://www.nature.com/ncomms/2014/140120/ncomms4113/full/ncomms4113.html

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Silicon Image Wireless Ultra HD 4K in the Works

Silicon Image Wireless Ultra HD 4K in the Works | Sciences & Technology | Scoop.it
Silicon Image's upcoming solution is based on its 60GHz WirelessHD technology and includes a transmitter and a receiver that can send full, bit-accurate video at data rates up to 8Gbps.
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A Broken Immigration System and Patent Trolls are Stifling Tech Innovation | Gary Shapiro

A Broken Immigration System and Patent Trolls are Stifling Tech Innovation | Gary Shapiro | Sciences & Technology | Scoop.it

"Innovative ideas are the lifeblood of the American Dream, the engine that drives our nation’s economy. As such, we must do everything we can to empower innovators by attracting top talent and creating fertile and supportive environments for businesses to grow.

The tech industry has a critical role to play, by giving startups opportunities to share their ideas and learn from more established companies through events like the International Consumer Electronics Show. But in 2014, Congress has the opportunity to pave the way for future startup success stories by addressing two urgent innovation policy challenges: fixing an immigration system that lures away the best and brightest from our shores, and effectively allowing entrepreneurs to be squashed by patent trolls..."

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Un nouveau virus géant découvert en Sibérie

Un nouveau virus géant découvert en Sibérie | Sciences & Technology | Scoop.it
SANTE - Un nouveau type de virus géant, baptisé "Pithovirus", a survécu plus de 30.000 ans à la congélation, dans une couche de permafrost sibérien contemporaine de l'extinction de l'homme de Neandertal, selon une étude publiée lundi. Ce virus très ancien, capable d'infecter des amibes mais inoffensif pour les humains et les animaux, porte désormais à trois le nombre de familles des virus géants connues, notent les auteurs dans les comptes rendus de l'académie des sciences américaines, les PNAS.
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QUIZ: How Much Do YOU Know About Science?

QUIZ: How Much Do YOU Know About Science? | Sciences & Technology | Scoop.it

"Can You Pass The Science Quiz That Too Many Americans Failed?

 

Do Americans know their science? The results are in from a new National Science Foundation survey that assessed our knowledge of basic biology, chemistry, astronomy, geology, and physics -- and they don't look promising..."

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Comment vulgariser la science autrement? 

Comment vulgariser la science autrement?  | Sciences & Technology | Scoop.it

"Avec Marion Montaigne (illustratrice et auteur de bandes dessinées, auteur d'un blog humoristique de vulgarisation scientifique intitulé : Tu mourras moins bête (mais tu mourras quand même et Julien Bobroff, physicien, créateur du site Vulgarisation.fr"


Via Audrey Bardon
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This Graphene Nanoribbon Conducts Electricity Insanely Fast

This Graphene Nanoribbon Conducts Electricity Insanely Fast | Sciences & Technology | Scoop.it
You're looking a ribbon of graphene that's just one atom thick and fifteen atoms wide—and it could help shift data thousands of times faster than anything else currently can.
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L'Homme colonisera-t-il Mars avec des robots bâtisseurs ?

L'Homme colonisera-t-il Mars avec des robots bâtisseurs ? | Sciences & Technology | Scoop.it
VIDÉO - Pour préparer la colonisation de la planète Mars par l’Homme, des robots bâtisseurs autonomes pourraient d’abord être utilisés. C'est en tout cas ce que proposent trois scientifiques américain

Via LeJournaldelaScience
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A Tiny New Chip Promises Internet 400 Times Faster Than Google Fiber

A Tiny New Chip Promises Internet 400 Times Faster Than Google Fiber | Sciences & Technology | Scoop.it
Fast internet is fast. Google Fiber's gigabit connections? That's like driving a sports car compared to the go-cart-speed connection that's probably in your house. But new technology from IBM opens the door for connections that are beyond fast.
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Le Raspberry Pi devient une Box domotique

Le Raspberry Pi devient une Box domotique | Sciences & Technology | Scoop.it

"Le Raspberry Pi, cette célèbre carte de développement, devient une box domotique. En effet, une version adaptée de la box domotique Zibase est disponible pour la carte..."

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The Complete History of Science

The Complete History of Science (Full Documentary) . 2013

 

"This documentary as well as the rest of these documentaries shown here relate to important times and figures in history, historic places and people, archaeology, science, conspiracy theories, and education. The Topics of these video documentaries are varied and cover ancient history, Rome, Greece, Egypt, science, technology, nature, planet earth, the solar system, the universe, World wars, battles, military and combat technology, current events, education..."

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Ils viennent de résoudre un des plus grands problèmes de l’informatique quantique

Ils viennent de résoudre un des plus grands problèmes de l’informatique quantique | Sciences & Technology | Scoop.it

"L’informatique quantique est une promesse technologique passionnante, mais sans cesse insaisissable. Les raisons sont multiples et l’une d’elle et que les scientifiques n’ont pas été en mesure de repérer efficacement les erreurs dans les calculs quantiques. Oh ! Mais ça, c’était  avant."


Via Jean-Philippe BOCQUENET
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Power Over Ethernet Router Conversion

Power Over Ethernet Router Conversion | Sciences & Technology | Scoop.it

"The idea driving this project is to turn any standard, off-the-shelf router into a Power Over Ethernet (PoE)-capable unit without buying any adapters or additional hardware.

PoE is somthing fairly common in many business/office spaces. For example, many wireless access points in office buildings and universities use the technology so they don't have to run a power receptacle to wireless access points. For this instructable though, we're going to use PoE in a residential setting. Even the big router companies are starting to sell these adaptors to consumers like this Linksys WAPPOE12. But I think it costs way too much and is kinda bulky. If you're into the DIY bulky thing though/have a need for an external PoE injector, you could try this option..."

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Deux scientifiques créent une pile surpuissante par accident

Deux scientifiques créent une pile surpuissante par accident | Sciences & Technology | Scoop.it
Deux scientifiques américains viennent de faire la découverte d'un nouveau type de pile à base de carbone, qui se chargerait 100 fois plus vite qu'une batterie classique, et serait biodégradable.
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Why 3D Printing is the Future {Infographic}

Why 3D Printing is the Future {Infographic} | Sciences & Technology | Scoop.it
Tweet Tweet 3D printers have been around for a while now. Their prices are slowly coming down. Some people are still not sure what they can do with a 3D printer though. 3D printers can print food, human tissue, plastic, and other material.

Via António Gonçalves, juandoming
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Harold Thwaites's curator insight, January 22, 2014 7:55 PM

Sci-fi becomes sci-reality once again.