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Digital Library for Physics and Astronomy

Digital Library for Physics and Astronomy
Related:  Advanced Databases and Search EnginesMoteurs de recherche spécialisés

The Collection of Computer Science Bibliographies About the Collection This is a collection of bibliographies of scientific literature in computer science from various sources, covering most aspects of computer science. The bibliographies are updated weekly from their original locations such that you'll always find the most recent versions here. The collection currently contains more than 3 millions of references (mostly to journal articles, conference papers and technical reports), clustered in about 1500 bibliographies, and consists of more than 2.3 GBytes (530MB gzipped) of BibTeX entries. More than 1 million of references contain URLs to an online version of the paper. For more information on the contents of this collection have a look at the bibliographic statistics. Search for publications in the bibliography collection Since the bibliographies are not just referenced by links, but actually mirrored and present as a local copy, they are searchable. Bibliographies The bibliographies have been categorized hierarchically. Comments

Economics Search Engine José Saramago: ¿Un escritor comprometido? El pasado trece de junio, durante la última jornada del ciclo literario “Lecciones y Maestros”, celebrado en Santillana del Mar, el escritor portugués José Saramago disertó sobre la crisis civilizatoria que enfrenta la humanidad, sobre la dictadura encubierta que gobierna el planeta y sobre la derechización de la izquierda institucional. En realidad, nada novedoso aportó el premio Nobel, aunque siempre sea oportuno recordar determinadas realidades. Sin embargo - y aunque esta afirmación pueda resultar insólita a muchos lectores - entre el discurso y la práctica de José Saramago existen importantes contradicciones, que no deberían obviarse. En la citada intervención del ciclo literario “Lecciones y Maestros”, Saramago pidió a los ciudadanos que “perdieran la paciencia ahora que la izquierda había dejado de ser izquierda”. “Ya no queda mucho tiempo para tratar de cambiar el mundo. Sobre Cuba, Colombia y el Grupo PRISA José Saramago fue bastante más lejos. 1. 3. 5. 6. 7. 10. 11.

Atomic Clock Ensemble in Space (ACES) / Human Spaceflight Research / Human Spaceflight Atomic Clock Ensemble in Space (ACES) Atomic Clock Ensemble in Space (ACES) is a fascinating new ESA mission developed in cooperation with the French Space Agency (CNES) that will expand the range of research on the International Space Station (ISS). The ACES clocks will be installed on the external payload facility of the Columbus module. The frequency reference generated on-board the ISS will be used by a worldwide network of ground terminals to perform comparisons with the best available atomic clocks on the ground. Time flies on the ISS Short introductory video of ACES. The most precise measurement of time yet – in space – will be used to probe our knowledge of the fundamental laws of physics ruling the Universe. The ACES payload will be installed on the external payload facility of the Columbus module. ACES attached to Columbus. The most precise measurement of time yet – in space – will be used to probe our knowledge of the fundamental laws of physics governing the Universe. Conclusion

Social Science Research Network Typologie des moteurs et outils de recherche Remarque préalable : Il existe de nombreuses typologies possibles des moteurs de recherche, selon toutes sortes de critères. Chaque moteur relève de plusieurs catégories, les critères sont évidemment étroitement imbriqués et présents simultanément. Et il est donc vain de chercher à dresser une typologie complète et définitive, sur des "objets" aussi mouvants et hybrides que les moteurs de recherche.[1] La typologie proposée ici est donc très limitée, partielle et cherche seulement à faire ressortir quelques grands critères, permettant une exploration et une comparaison cohérente d’un certain nombre d'outils. Nous avons choisi plusieurs critères permettant une approche différenciée des moteurs : - l'offre des ressources : quelle est la nature du contenu des ressources collectées ? - la présentation des résultats : les résultats sont-ils présentés de manière linéaire, visuelle, cartographique, orale, etc. ? 1/ Typologie selon l’offre de ressources 2/ Moteurs de recherche en temps réel

ADS Account Manager This preference setting procedure makes use of WWW browser cookies. Setting a cookie with your browser allows us to store your preferences and then look them up automatically when you come back to our site. The whole ADS login system works only if you have cookies enabled. Home NRC facilitates access to international R&D network for Canadian firms New innovation advantage for Canadian companies through access to technology, expertise, and markets in Europe and beyond. Digital technology adoption resources Improve your understanding of the link between digital technologies and productivity from actual technology adoption experiences that are featured in learning documents, videos and success stories. NRC Success stories Take a look out how NRC's market-driven research, technology development and commercialisation support services help companies bring their product to the marketplace.

The Encyclopedia of Psychology Submit to Add Your Site If you have a resource you feel should be listed, please use this form to have it approved. We individually review each submission, so be sure to fill in every field to expedite the process. Should your resource pass muster, we will notify you of our plans to post it. Managing Submissions To make changes to a listed resource, please email us at with URL of the resource, the issue, the fix and your name. Disclaimer: While we thoroughly vet all third party resources, we are not responsible for the information contained within a source we do not own. At any time, the owner of a resource may request his or her material be removed from our encyclopedia.

Direct access - Technische Informationsbibliothek (TIB) More than 26 million electronic full texts can be retrieved directly from the TIB Portal, including over eight million freely accessible articles. Information concerning direct access In order to make use of TIB's Pay-per-View service, you must be registered as a customer. Overview The table below contains a list of providers with their relevant Pay-per-View, free access or national licence offers. Galaxy Zoo: Hubble How does a light-mill work? [Physics FAQ] - [Copyright] updated June 1997 by PEG. Original by Philip Gibbs July 1996. In 1873, while investigating infrared radiation and the element thallium, the eminent Victorian experimenter Sir William Crookes developed a special kind of radiometer, an instrument for measuring radiant energy of heat and light. Crookes's Radiometer is today marketed as a conversation piece called a light-mill or solar engine. When sunlight falls on the light-mill, the vanes turn with the black surfaces apparently being pushed away by the light. When this was realised, other explanations for the radiometer effect were sought and some that people came up with are still mistakenly quoted as correct. To understand why these common explanations are wrong, think first of a simpler setup in which a tube of gas is kept hot at one end and cool at the other. Another blind alley was the theory that the heat vaporises gases dissolved in the black coating, which then leak out and propel the vanes round. P.N.