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Marchés Ruraux de Bois-énergie au Bénin: Un outil de gestion ...

DOSSIERS Marchés Ruraux de Bois-énergie au Bénin: Un outil de gestion durable des ressources forestières (Le directeur du Projet Bois de Feu II invite les maires à s’approprier l’approche) La dépendance des populations béninoises en bois-énergie est élevée et sans cesse grandissante. Ce qui occasionne d’énormes pressions sur le couvert forestier national. Selon les statistiques, cette dépendance pourrait s’accroître dans les prochaines années si des sources alternatives d’énergie domestique ne sont pas trouvées ou que la gestion des ressources ligneuses disponibles [suite...]

Date: 2010-09-10 09:56:15

Articles de blogs (18) | Aucune vidéo
 


F1 : Magny-Cours 2 - Modernisation project of Circuit de Nevers

Magny-Cours 2 ne saurait se satisfaire de la situation rurale privilégiée du Circuit et de l'atout qu’elle lui confère au regard de la réduction des nuisances de fonctionnement habituellement subies par une trop grande proximité urbaine de certaines grandes installations sportives.    Ce projet entend intégrer tous les apports possibles d'une démarche de Haute Qualité Environnementale. Cette préoccupation, désormais partagée par les plus hautes instances sportives internationales, est en effet une dimension essentielle pour la contribution apportée par les sports mécaniques [suite...]

Date: 2008-06-20 10:51:14


Spectrum Renewable Energy Australia

The increase in surface UVB due to ozone hole may be partially inferred by calculation radiative transfer model, but can not be calculated from direct measurements because of the lack of reliable historical data (pre-ozone hole) UV surface data, but the latest step programs UV surface observation exist (for example, Lauder, New Zealand). Because this is the same radiation UV creates ozone in the ozone layer of O2 (oxygen ordinary) first, a reduction of the stratospheric ozone layer, actually tend to increase photochemical production ozone at lower levels (in the troposphere), although the [suite...]

Date: 2010-09-15 13:41:22


Transfert d'energie dans un circuit - Forum Physique

Navigation SciencesAccueilActualités:dernières dépêchesAgenda:conférences, expositions...Biographies:portraits de personnalitésCarte blanche:métiers de chercheursCitations:citations sur les sciencesDossiers:+ de 700 dossiersEphémérides:le ciel du mois à découvrirExplo'régions:musées, parcs, châteaux...Glossaire:+ de 5000 définitionsForums:venez poser vos questionsGalerie photos:+ de 3000 photosPodcast:l'actu version audioQuestions / RéponsesFonds d'écranCartes virtuellesHigh-TechAccueil:votre nouveau mag high-techActualités:l'actu informatique et technoAstuces:trucs et [suite...]

Date: 2007-04-08 08:31:26


La mémoire électronique entre dans l'ère du spin - Jeunes Du Maroc ...

Dans cette m�moire, les donn�es sont stock�es et r�cup�r�es � l’aide d’un champ magn�tique agissant sur l’orientation du spin des �lectrons C’est une banale m�moire pour ordinateur, mais d’un genre totalement nouveau : ce circuit est en plastique et les bits y sont stock�s en jouant non pas sur la charge �lectrique des �lectrons comme dans l’�lectronique traditionnelle mais sur leur « spin » : un effet magn�tique li� � l’�nergie cin�tique � l’�chelle quantique et qui permet d’ « orienter » l’�lectron. Le circuit, [suite...]

Date: 2010-09-07 10:32:44


Institute for Energy Efficiency Part 2: Researching Next ...

On the next generation of computers, you’ll have a connector that you can plug this into or if you want to connect two computers or this to an external drive or something, and you can transfer data rates of nominally of 50-gigabits per second which is just phenomenal. It’s an enormous leap forward. And it’s being possible because of this marriage of silicon microprocessor technology with optical, what we call, platonics which is the optical circuitry that is based, as I said, in an entirely different material system. Bringing those two together has been phenomenally successful. Ben [suite...]

Date: 2010-09-12 02:13:12


tutorials fluid power cascade circuits 25 | .:: Diya PDF ...

stress – Strain energy in bending and torsion. TUTORIALS 15. TOTAL: 60 …. circuit components, sequencing circuits, cascade, and karnaugh – Veitch map … Petor Rohner, Fluid Power Logic circuit, Design Macmillon Press Ltd., 1990. … http://www.stpetersuniversity.org/Pdf/syllabus/PRODUCTION 3 & 4 SEMESTER ORG.pdf # pdf Hong Kong Institute of Vocational Education Mechanical … 5. understand the principles of fluid power systems and their industrial applications; … The module consists of formal lecture, tutorial and laboratory work in a small group. … circuits by intuitive and [suite...]

Date: 2010-09-13 10:28:01


Save a Bundle With New Energy Star Qualified Hot Water Heaters ...

Instead, they use that energy to transfer existing heat from the surrounding air into the water in the tank. Think of a heat pump water heater as a refrigerator operating in reverse: it extracts warmth from the air in the room where it is installed (or from an outdoor airspace) into the water in the tank, using the same type of evaporator/condenser circuit that a refrigerator or air conditioner uses. As a result, heat pump water heaters can extract 2 to 3 units of heat from the surrounding air for every unit of electrical energy used to run the compressor, which is why you will see [suite...]

Date: 2010-09-17 15:23:21


Kinds of tranformer - Kinds of Transformer for Power Generation ...

Energy from a single circuit? another. Transformers have been kind of instrument? Used electric? f? r a transfer? Energy source? others but disabilities. Transformers have been accessible in some-more numbers as well as M to Verf? Supply? My time, they have been obtained? Ltlich in diff? Various types. Some of these sorts of transformers have been transformers, transformer, transformer, transformer? Electrical, audio transformer, flyback transformer, transformer? High-voltage, low voltage transformer, transformer. The processors have been sold? ?, Omissions vern affordable prices so which [suite...]

Date: 2010-09-02 22:37:48


La mémoire électronique entre dans l'ère du spin « Les nouvelles ...

Orienter les électrons, plutôt que les faire circuler, éviterait par ailleurs la surchauffe des circuits et consomme peu d’énergie. Le plastique, en outre, autorise un gain de masse par rapport aux semi-conducteurs classiques. Les chercheurs affirment que le procédé utilisé pour fabriquer leur mémoire est un procédé standard utilisé dans l’industrie et que le transfert de technologie ne devrait pas poser de problèmes. A suivre… Tags: Electronique, électronique de spin, électronique polymères, Informatique, mémoire, spintroniqueA la UNE!, Electronique, Informatique, [suite...]

Date: 2010-08-11 08:25:16


Kentucky Rural Water Association » Blog Archive » The Rural Water ...

Recognizing that energy is the single largest cost for small water and sewer utilities, the bill establishes a circuit rider technical assistance program to improve energy efficiency, identify and develop alternative and renewable energy supplies and conserve water in the operation of rural drinking water and wastewater facilities. S. 1462 is the only senate energy bill that has passed out of a committee and has bipartisan support. It will be merged with other energy conservation proposals, but as a provision in the core bill, it has a good chance to survive in any final comprehensive [suite...]

Date: 2010-09-17 14:39:42


The Short solar energy develops the polycrystalline silicon solar ...

The transfer efficiency is 18.2% units, its opening voltage is 642mV, the short-circuit current density is 6.2mA/cm2, the area is 243.34cm2. The transfer efficiency is 17.6% modules, its opening voltage is 38.3V, the short-circuit current is 8.94A, the daylighting area is 1.4701m2. Moreover, looking from entire module’s area (1.6075 m2), the module transfer efficiency is 16.1%.   On September 17, an international telegram Ningxia solar energy Limited company issue of 2500 ton polycrystalline silicon project operational ceremony is held in Hui nung. Autonomous region Party committee member, [suite...]

Date: 2010-09-15 15:39:47


Nanotechnology Now - Press Release: "Soitec announces Concentrix ...

Soitec (Euronext Paris), the world's leading supplier of silicon-on-insulator (SOI) and advanced solutions for the electronics and energy industries, announced today that its Concentrix Solar division focusing on concentrator ... Tracit provides thin-film layer transfer technologies used to manufacture advanced substrates for power ICs and microsystems as well as generic circuit transfer technology, Smart Stacking™, for applications such as image sensors and 3D [suite...]

Date: 2010-09-17 15:50:26


solar powered tesla coil | gasmarket.ca

It then is converted through an induction coil sending the high frequency/high voltage current through a tank circuit that powers up a Tesla sending coil. This Tesla system was built to explore the use of the Sun's solar radiant energy as a source of usable sending power. On a small scale I would say it works. More to come in the next series of videos...... The Magnevex Magnetic vortex research project This entry was posted on Friday, September 17th, 2010 at 9:17 am and is filed under How To Videos. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a [suite...]

Date: 2010-09-17 13:17:23


Intro to Audio Transformer | Karmsund BK.com

RF transformers transfer energy from one circuit to another by electromagnetic induction. Signal transformers transfer information from one circuit to another by electromagnetic induction. Switch mode transformers are generally used mainly in switching power supplies and DC-DC converters. Telecom transformers are used in applications which require high bandwidths and fast switching [suite...]

Date: 2010-09-04 17:46:27


Printed Electronics World: Water powered clocks

Desktop clocks powered solely on water (or any electrolytic fluid such as soda, coffee or even beer) are now available in several designs. The water clock displays the time and date in clear, easy to read numbers just moments after the liquid reservoirs are filled. It works this this way: The internal converter simply extracts electrons from water (or other liquid) molecules and provides a steady stream of electrical current acting as a fuel cell to generate power to the clock. The clock below can also be used as a [suite...]

Date: 2010-05-16 06:36:31


Build Your Own Solar Panel System | gettingoffgrid.com

Each light particle then carries its energy down through the cell. The photons then transfer their power to electrons in the lower layer of the cell. The electrons use this energy to escape into the circuit by jumping the barrier into [suite...]

Date: 2010-09-17 17:52:07


What is capital? | Wall Street Stocks | New York Stock Exchange ...

Vladimir Putin We discussed this important issue yesterday over a [suite...]

Date: 2010-09-15 18:33:58



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