Group items tagged atom - Nerdzr

shared by Jac Londe on 27 Apr 11 - No Cached

Researchers create super-small transistor, artificial atom powered by single electrons
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The SketchSET—which is the first single-electron transistor made entirely of oxide-based materials—consists of an island formation that can house up to two electrons. The number of electrons on the island—which can be only zero, one, or two—results in distinct conductive properties. Wires extending from the transistor carry additional electrons across the island.
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One virtue of a single-electron transistor is its extreme sensitivity to an electric charge, Levy explained. Another property of these oxide materials is ferroelectricity, which allows the transistor to act as a solid-state memory. The ferroelectric state can, in the absence of external power, control the number of electrons on the island, which in turn can be used to represent the 1 or 0 state of a memory element. A computer memory based on this property would be able to retain information even when the processor itself is powered down, Levy said. The ferroelectric state also is expected to be sensitive to small pressure changes at nanometer scales, making this device potentially useful as a nanoscale charge and force sensor.
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shared by Jac Londe on 06 May 12 - Cached

Second From Wikipedia, the free encyclopedia Jump to: navigation, search This article is about the unit of time. For other uses, see Second (disambiguation). A light flashing approximately once per second The second (SI unit symbol: s) is the International System of Units (SI) base unit of time[1] and also a unit of time in other systems (abbreviated s or sec[2]). Between 1000 (when al-Biruni used seconds) and 1960 the second was defined as 1/86,400 of a mean solar day (that definition still applies in some astronomical and legal contexts).[3][4] Between 1960 and 1967, it was defined in terms of the period of the Earth's orbit around the Sun,[5] but it is now defined more precisely in atomic terms. Seconds may be measured using mechanical, electric or atomic clocks.
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shared by Jac Londe on 27 Oct 10 - No Cached

shared by Jac Londe on 30 Sep 12 - No Cached

ImportXML ImportXML permet d'importer les données présentes dans des fichiers de type xml, html, csv ou tsv, ainsi que dans des flux RSS et Atom que vous pourriez lire dans Google Reader. Par défaut, seuls les fichiers publics peuvent être lus. Les données figurant dans d'autres feuilles de calcul ne peuvent pas être référencées tant que la feuille de calcul en question n'a pas été publiée. "URL" correspond à l'URL du fichier XML ou HTML. "requête" correspond à la requête XPath à exécuter sur les données disponibles à l'URL indiquée. Chaque résultat de la requête XPath est placé dans une ligne spécifique de la feuille de calcul. Pour plus d'informations sur XPath, consultez le site http://www.w3schools.com/xpath/. Exemple : =importXml("www.google.com"; "//a/@href"). Cette formule renvoie l'ensemble des attributs "href" (URL des liens) figurant dans les balises <a> de la page d'accueil du site www.google.com. Remarque : Une feuille de calcul ne peut pas contenir plus de 50 fonctions ImportXML.
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shared by Jac Londe on 05 Mar 12 - Cached

shared by Jac Londe on 07 Aug 10 - Cached

shared by Jac Londe on 06 Sep 10 - No Cached

WeTab presents the first tablet with open operating system MeeGo
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Working intensively with Intel, we have developed the WeTab OS with MeeGo to meet the requirements of a tablet user in the best way possible. The tablet runs extremely fast
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The Web-browser plays a special role here and is based on the free HTML rendering engine WebKit, enabling fast and unrestricted surfing enjoyment including HTML5, Adobe Flash® and Java™.
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MeeGo is a Linux-based, open-source operating system intended to run on a variety of hardware platforms including smartphones, handhelds, netbooks, televisions that are connected to the Internet and passenger cars.
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MeeGo is a multi-platform project and supports the X86/Intel-Atom and ARM architectures. It can be transferred to other hardware platforms at any time.
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