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Transition énergétique, les sciences oubliées ?

Transition énergétique, les sciences oubliées ? | Sciences & Technology | Scoop.it

Peut-on introduire de la science dans le débat sur la transition énergétique ?

 

L’initiative gouvernementale continue - non sans cahots et polémiques - avec une phase de débats qui se termine, et qui doit aboutir au vote d’une loi d’orientation en octobre, sans que le limogeage de Delphine Batho, remplacée par Philippe Martin, ne ralentisse le processus. Lundi 8 juillet, se tiendra, un séminaire conjoint des délégations territoriales porteuses des débats locaux et du Conseil national du débat, à l'Université Paris-Dauphine. Et le jeudi 18 juillet, une réunion du Conseil national du débat se tiendra à Paris. Les recommandations du débat seront remises, au Gouvernement, lors de la Conférence environnementale des 20 et 21 septembre prochains.

 

Ministres, élus, ONG, partis politiques, entreprises, citoyens et lobbys de toutes sortes se sont donc mobilisés. Logique, car les enjeux énergétiques, majeurs en économie ou en géopolitique, servent de marqueurs idéologiques. Le président du «groupe d’experts» du débat, Alain Grandjean, ne se fait donc pas d’illusions :«Les acteurs sociaux veulent-ils vraiment échanger des arguments vérifiables, le signe caractéristique d’un débat fondé sur l’apport des sciences ? Il me paraît clair que non. Les organisations syndicales défendent les emplois de leurs mandants, les chefs d’entreprise leurs actionnaires, les ONG leurs positions préétablies… Les intérêts en jeu dominent ce débat, politique avant tout.»...

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Demonstration of "CrystEna" energy storage system

Demonstration of "CrystEna" energy storage system | Sciences & Technology | Scoop.it

"Hitachi America, Ltd., a wholly owned subsidiary of Hitachi, Ltd. and Demansys Energy, Inc. ("Demansys"), a smart grid technology company with offices in Connecticut and Troy, New York, announced today that they have completed construction and commissioning of a 1 MW Lithium Ion energy storage facility utilizing Hitachi's "CrystEna" compact container-type energy storage system and have started a demonstration project in Somerdale, New Jersey."

Read more at: http://phys.org/news/2015-02-crystena-energy-storage.html#jCp

 

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Raspberry Pi 2 Arrives: 6x Faster, An “Entry-Level PC” For $35

Raspberry Pi 2 Arrives: 6x Faster, An “Entry-Level PC” For $35 | Sciences & Technology | Scoop.it

"Grab your screwdrivers, makers! There’s a new, more powerful Raspberry Pi in town… The just announced Pi 2, which goes on sale today, adds a quad-core chip and double the memory to support more intensive processing tasks.

The Pi Foundation also reckons this sequel takes the Pi microprocessor “firmly into the PC space”, as they put it — in terms of power punch packed.

“With the Pi 1, there were people using it as a PC but you had to make allowances for the fact it was a $35 PC,” says Pi creator, Eben Upton, in an interview with TechCrunch. “The big difference with the Pi 2 is it’s a PC. It’s not a PC which is pretty good considering it cost you $35. It’s a PC that’s pretty good..."

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Perovskites provide big boost to silicon solar cells

Perovskites provide big boost to silicon solar cells | Sciences & Technology | Scoop.it
Stacking perovskites onto a conventional silicon solar cell dramatically improves the overall efficiency of the cell, according to a new study led by Stanford University scientists.
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Zinc oxide materials tapped for tiny energy harvesting devices

Zinc oxide materials tapped for tiny energy harvesting devices | Sciences & Technology | Scoop.it

"Today, we're surrounded by a variety of electronic devices that are moving increasingly closer to us - we can attach and wear them, or even implant electronics inside our bodies.

 

Many types of smart devices are readily available and convenient to use. The goal now is to make wearable electronics that are flexible, sustainable and powered by ambient renewable energy.

This last goal inspired a group of Korea Advanced Institute of Science and Technology (KAIST) researchers to explore how the attractive physical features of zinc oxide (ZnO) materials could be more effectively used to tap into abundant mechanical energy sources to power micro devices. They discovered that inserting aluminum nitride insulating layers into ZnO-based energy harvesting devices led to a significant improvement of the devices' performance. The researchers report their findings in the journal Applied Physics Letters..."

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The future is bright, the future is quantum dot televisions

The future is bright, the future is quantum dot televisions | Sciences & Technology | Scoop.it

 

The Consumer Electronics Show (CES) has arrived again, the world's largest consumer electronics and technology exhibition in Las Vegas, where manufacturers will show off the new technologies available in 2015 (...)

Korean electronics and display manufacturer LG has set the ball rolling by announcing its 4K ultra high-definition television displays (UHDTVs) that use quantum dot technology, an improved method for producing colour displays.

What exactly is a quantum dot?


Read more at: http://phys.org/news/2015-01-future-bright-quantum-dot-televisions.html#jCp

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Texas Instruments builds an alternative energy for the Internet of Things

Texas Instruments builds an alternative energy for the Internet of Things | Sciences & Technology | Scoop.it
The Internet of Things is nothing without batteries and plugs. But it's possible to build a sensor network that uses harvested energy that comes from changes in temperature, vibrations, wind and light, as Texas Instruments will demonstrate at the Consumer Electronics Show in January.
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An Infographic In Celebration of Computer Science Education Week

An Infographic In Celebration of Computer Science Education Week | Sciences & Technology | Scoop.it
It’s easy to take digital technology for granted these days. To students who were practically born with an iPad in their hands, it’s hard to imagine a time when a world of history and knowledge wasn’t just a few swipes away.
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Des rayons cosmiques plus riches que prévu

Des rayons cosmiques plus riches que prévu | Sciences & Technology | Scoop.it
Après plusieurs décennies d'études, les chercheurs se demandent encore de quoi sont fait les rayons cosmiques ultra-énergétiques, en provenance des confins de la Galaxie.
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Pour une éthique de la recherche en robotique

Pour une éthique de la recherche en robotique | Sciences & Technology | Scoop.it

"À l’occasion de la remise d’un rapport préconisant l’adoption de règles éthiques encadrant la recherche et la production robotiques, Raja Chatila, directeur de l’Institut des systèmes intelligents et de robotique, précise la nature et l’intérêt de telles règles..."

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La batterie du futur sera produite dans les Pyrénées

La batterie du futur sera produite dans les Pyrénées | Sciences & Technology | Scoop.it
Le géant canadien de l'énergie Hydro-Québec va développer dans son futur laboratoire de recherche de Lacq (Pyrénées-Atlantiques), une technologie révolutionnaire permettant de produire d'ici à 2020 la batterie du futur.
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Copper iodide phosphors could mean less-expensive and toxic LEDs | Ben Coxworth | GizMag.com

Copper iodide phosphors could mean less-expensive and toxic LEDs | Ben Coxworth | GizMag.com | Sciences & Technology | Scoop.it

Everybody loves LEDs, as they're far more efficient and longer-lasting than traditional incandescent bulbs. They're also more economical to use in the long run, although they're costlier on a per-bulb basis. That price gap could soon be closing, however, as scientists have discovered a cheaper alternative to one of their most expensive ingredients.

White light-emitting LEDs use metals known as rare earth elements (REEs) for their phosphors – these are the materials that convert the light emitted from LED chips into longer wavelengths, allowing the bulbs to put out full-spectrum visible light.

The mining and processing of REEs is hazardous, however, leaving China as just about the only country currently supplying them in substantial quantities. This drives up their price, which could climb even higher as demand for LED-based technologies increases.

Led by Prof. Jing Li, a team of scientists from New Jersey's Rutgers University has now discovered that a family of materials made from relatively cheap and abundant copper iodide can be substituted for REEs.


Via Chuck Sherwood, Senior Associate, TeleDimensions, Inc
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Nvidia's Maxwell graphics chips for laptops can beat some powerful gaming desktops

Nvidia's Maxwell graphics chips for laptops can beat some powerful gaming desktops | Sciences & Technology | Scoop.it
With Maxwell, laptop graphics will be 80% as speedy as desktop graphics.

 

"Computer gaming is about to take a big leap forward. Nvidia is launching its next-generation graphics chips for laptops today that the company claims are at about 75 percent of the performance of the fastest desktop graphics processing units (GPU)s..."

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Une petite histoire du nucléaire: Stagg Field, 1942 [1/2]

Une petite histoire du nucléaire: Stagg Field, 1942 [1/2] | Sciences & Technology | Scoop.it
1942, sous les gradins du stade de Stagg Field, dans la banlieue de Chicago. Le premier réacteur nucléaire de l'Histoire va démarrer sous la houlette du physicien italien Enrico Fermi.
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Magnetic nanoparticles enhance performance of solar cells

Magnetic nanoparticles enhance performance of solar cells | Sciences & Technology | Scoop.it
Magnetic nanoparticles can increase the performance of solar cells made from polymers - provided the mix is right. This is the result of an X-ray study at DESY's synchrotron radiation source PETRA III.
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Raspberry Pi 2 le nouveau Raspberry est sorti !

Raspberry Pi 2 le nouveau Raspberry est sorti ! | Sciences & Technology | Scoop.it
Peur des clones ? Alors que la Fondation laissait entendre après la sortie du Modèle B+ que rien ne bougerait côté matériel avant 2017, voici que sort ce matin le Raspberry Pi 2.

Via Aurélien BADET
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Laser pulses used to track motion of electrons in metals with attosecond precision

Laser pulses used to track motion of electrons in metals with attosecond precision | Sciences & Technology | Scoop.it

"It is easy to measure electric current. But it is extremely hard to watch the individual electrons which make up this current. Electrons race through the metal with a speed of several million meters per second, and the distance they have to cover between two adjacent atoms is very small. This means that tiny time intervals have to be resolved in order to watch the electrons dashing through the metal.

 

Measurements in Garching (Germany) and theoretical calculations at the Vienna University of Technology (Austria) have now made this possible. As it turns out, the motion of the electrons in the metal is remarkably similar to ballistic motion in free space. The results have now been published in the journal Nature..."

 

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Honda FCV Concept fuel-cell vehicle makes debut in Detroit

Honda FCV Concept fuel-cell vehicle makes debut in Detroit | Sciences & Technology | Scoop.it
Honda has taken full opportunity of the timing of the 2015 North American International Auto Show in Detroit this month to announce up and coming launches.
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How did we find the distance to the sun?

How did we find the distance to the sun? | Sciences & Technology | Scoop.it
How far is the Sun? It seems as if one could hardly ask a more straightforward question. Yet this very inquiry bedeviled astronomers for more than two thousand years.
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Thermoelectric power plants could offer economically competitive renewable energy

Thermoelectric power plants could offer economically competitive renewable energy | Sciences & Technology | Scoop.it
(Phys.org)—A new study predicts that large-scale power plants based on thermoelectric effects, such as small temperature differences in ocean water, could generate electricity at a lower cost than photovoltaic power plants.
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Research team announces new class of compounds that appear to be effective against malaria

Research team announces new class of compounds that appear to be effective against malaria | Sciences & Technology | Scoop.it
(Phys.org) —A large team of researchers with members from around the globe has announced that a class of compounds they've been studying (pyrazoleamides) appears to be successful in fighting malaria.
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The Easiest Raspberry Pi Media Centre, With RasPlex

The Easiest Raspberry Pi Media Centre, With RasPlex | Sciences & Technology | Scoop.it
The Raspberry Pi is a surprisingly capable little computer. In the past, we've show you how to make a Raspberry Pi home theatre with Rasbmc. Since we published that guide, an easier to use and better performing operating system has been released. Today I'm going to show you how with RasPlex; it's the easiest way…
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Toyota lance "Mirai", véhicule du futur roulant à l'hydrogène

Toyota lance "Mirai", véhicule du futur roulant à l'hydrogène | Sciences & Technology | Scoop.it
Le constructeur nippon Toyota, pionnier des véhicules hybrides, a franchi mardi une nouvelle étape en présentant une berline fonctionnant à l'hydrogène, premier modèle de ce type commercialisé à grande échelle dans le monde, même si ses objectifs restent modestes.
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Un nouveau type de batterie lithium-soufre

Un nouveau type de batterie lithium-soufre | Sciences & Technology | Scoop.it
Des chercheurs de General Motors dirigés par Xingcheng Xiao déclarent avoir surmonté les obstacles menant à la conception d'une batterie lithium-soufre (Li-S), un modèle de batterie rechargeable qui a le potentiel de laisser la technologie...
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Samsung reveals five-times faster Wi-Fi

Samsung reveals five-times faster Wi-Fi | Sciences & Technology | Scoop.it
Samsung has revealed new technology making Wi-Fi speeds five-times faster for devices than the current norm
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Post-4K OLED TV: Where does picture quality go from here? - CNET

Post-4K OLED TV: Where does picture quality go from here? - CNET | Sciences & Technology | Scoop.it
Now that there are 4K OLED televisions, can picture quality get any better? Have we achieved perfection? If so, where do we go from here? Here's a list of next steps.
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