Gottlob Frege. Gottlob Frege cerca de 1879.
The New School Parsons Student Work. David Edward Hughes. David Edward Huhges.
Home - dbVar - NCBI. Profile on TED.com. Edge.org. Science - Videos on the People, Issues, and Ideas Changing the World. Field Guide to X-ray Sources. Quasars & Active Galaxies Quasars are peculiar objects that radiate as much energy per second as a thousand or more galaxies , from a region that has a diameter about one millionth that of the host galaxy.
It is as if a powerhouse the size of a small flashlight produced as much light as all the houses and businesses in the entire L.A. basin! Illustration shows a comparison between normal galaxy, active galaxy and quasar. Quasars are intense sources of X-rays as well as visible light . They are the most powerful type of X-ray source yet discovered. Cienciaonline.com. Crónicas de una periodista entre números. Updates on my research and expository papers, discussion of open problems, and other maths-related topics. By Terence Tao. Geometría Dinámica. Qué traman? Blog de La Buhardilla 2.0, un podcast de Ciencia. Conferencia: El lugar de la cultura. Jesús Mosterín. Fundación Juan March. CubeWorld - Your CubeSat Community. Naukas: Ciencia, Escepticismo y Humor.
Cuaderno de Cultura Científica. Enchufa2. Mapping Ignorance. Su.Doku.Es: Sudoku, Kakuro, Pasatiempos y Juegos de Ingenio. Historias de la Ciencia. Ciencia Xataka. EnlightenNext: The Magazine for Evolutionaries. CDMS II Detectors. CDMSII detectors are designed to detect the minute phonon and ionization signals generated within a detector crystal by elastic collisions between detector nuclei and WIMPs.
The energy deposited in a detector by an incident WIMP through the weak interaction may be as low as a few tens of keV, and event detection at such energy levels requires a sensitive experimental apparatus. The foremost requirement is that the detector be maintained at a very low temperature to distinguish the deposited energy from the thermal energy of the detector's nuclei. PNNL: CoGeNT Dark Matter Experiment. The XENON Dark Matter Project. The XENON100 experiment is located in the Gran Sasso mountain in central Italy, and is a new dark matter search experiment, aiming to increase the fiducial liquid xenon target mass to 100 kg with a 100 times reduction in background rate, compared to the XENON10 experiment.
The XENON100 detector uses the same principle of operation and many design features successfully tested in the XENON10 prototype. It is a position-sensitive XeTPC, with the sensitive LXe volume viewed by two arrays of total 178 photomultiplier tubes (PMTs), to detect simultaneously the primary scintillation signal (S1) and the ionization signal via the proportional scintillation mechanism (S2). The active target is enclosed in a PTFE cylinder of 15 cm radius and 30 cm height.
The XENON100 experiment has recently released results from the last run (2011-2012). Institut de Physique du Globe de Paris. Servicio Sismológico, Universidad de Chile. Departamento de Geofísica, Universidad de Chile. The science of everything. Megathrust earthquake. Megathrust earthquakes occur at subduction zones at destructive plate boundaries (convergent boundaries), where one tectonic plate is subducted (forced underneath) by another.
Due to the shallow dip of the plate boundary, which causes large sections to get stuck, these type of earthquakes are the planet's most powerful, with moment magnitudes ( ) that can exceed 9.0. Since 1900, all six earthquakes of magnitude 9.0 or greater have been megathrust earthquakes. No other type of known terrestrial source of tectonic activity has produced earthquakes of this scale. Terminology Areas The major subduction zone is associated with the Pacific and Indian Oceans and is responsible for the volcanic activity associated with the Pacific Ring of Fire.
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IEEE Spectrum: Technology, Engineering, and Science News. Internet Explorer no puede mostrar la página web. 15 de marzo 2013 Valdivia, Chile, y Washington, D.C.— Las células cancerosas convierten azúcar en lactato a un ritmo mucho mayor que las células normales.
Este fenómeno proporciona una señal que se utiliza para el diagnóstico y seguimiento de tumores malignos a través de técnicas como el PET. Ahora, un equipo de investigadores del Centro de Estudios Científicos (CECs), con la colaboración de Wolf Frommer del Centro Carnegie, EEUU, ha inventado un sensor molecular que es capaz de detectar este fenómeno por primera vez en células individuales.
Antes de este avance, ningún otro método de medición podía detectar lactato en tiempo real a nivel de una sola célula. El trabajo, publicado en la revista PLoS ONE, es un salto significativo para comprender cómo los diferentes tipos de células se comportan y desarrollan cuando son afectados por el cáncer. Los investigadores encontraron que las células tumorales producen lactato 3 a 5 veces más rápido que las células no tumorales.
IV, Phone: 310.825.0915, Email Biography Dr. Dr. New Cancer Diagnostic Technique Debuts. Special Features: Interactive Collections. Infographics. Handouts & Activities. Language model. A statistical language model assigns a probability to a sequence of m words by means of a probability distribution. Language modeling is used in many natural language processing applications such as speech recognition, machine translation, part-of-speech tagging, parsing and information retrieval. In speech recognition and in data compression, such a model tries to capture the properties of a language, and to predict the next word in a speech sequence. Artistic Technology Research, Universität für angewandte Kunst, Vordere Zollamtstrasse 3, A-1030 Wien, Austria // Artistic Research, Digital Humanities, Digital Research Methods, New Media Arts.
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Nsf.gov - National Science Foundation - US National Science Foundation (NSF) Overseas Development Institute (ODI) World Wide Web Foundation. Science map. VL People [per78] Life Sciences & Mathematics & Physical Sciences. Newsletters: CTBTO Preparatory Commission. Blasts From The Past: Historic Supernovas. Information materials: CTBTO Preparatory Commission. Category: Psychology. Brain - TIME - News, pictures, quotes, archive. Skip to Content Topics Sections → Search Brain Articles Teens’ Brain Structure May Be Altered By Smoking By Alice Park.
Europeana - Homepage. View Chandra Images in 3D Wall. Constellation Ophiuchus. Ophiuchus (serpent bearer) Location: Equatorial, visible in both HemispheresCoordinates: Right Ascension: 17h Declination: 0ºSource: Greek Mythology The story behind the name: The constellation Ophiuchus seems to be a figure of a man entwined with two snakes, one in each hand. The constellation is an ancient one, but most often associated with Asclepius, the son of Apollo and Coronis. Asclepius was regarded as the founder of medicine, having learned the healing arts from both his father Apollo and his tutor, the wise Centaur Chiron. In one series of myths, Asclepius is killed by Zeus. New Books in Science, Technology, and Society — Just another New Books Network podcast. CERN press office. First three-year LHC running period reaches a conclusion. Geneva 14 February 2013.
At 7.24am, the shift crew in the CERN1 Control Centre extracted the beams from the Large Hadron Collider, bringing the machine’s first three-year running period to a successful conclusion. The LHC’s first run has seen major advances in physics, including the discovery of a new particle that looks increasingly like the long–sought Higgs boson, announced on 4 July 2012. And during the last weeks of the run, the remarkable figure of 100 petabytes of data stored in the CERN mass-storage systems was surpassed. This data volume is roughly equivalent to 700 years of full HD-quality movies. Bulletin. CERN Courier digital edition. Welcome to CERN Courier digital edition – the magazine for the high-energy-physics community. Jan/Feb 2013Download March 2013Download Apr 2013Download May 2013Download June 2013Download Jul/Aug 2013Download Sep 2013Download Oct 2013Download Nov 2013Download Dec 2013Download Jan/Feb 2014Download Mar 2014Download Apr 2014Download *These PDFs are best viewed on a desktop computer using Acrobat Reader 5 or later.
Users viewing them on various mobile or tablet devices may experience limited functionality or lag. Scientific Information Service. Annual report - Rapport annuel CERN publications in 2007 Catalogue of all known publications resulting from research done at CERN during the year. Searchable version extracted from CERN Document Server. Annual reports of CERN departments [PH] Annual report - Rapport annuel CERN publications in 2006 Catalogue of all known publications resulting from research done at CERN during the year. Searchable version extracted from CERN Document Server. Annual reports of CERN departments [PH] CERN Courier. Backgrounders.
Compositeness The unprecedented energy of proton collisions at the LHC could be what scientists need to find a new world of subatomic particles Dark matter Dark matter makes up more than 80% of all the matter in the universe, but it can only be detected by its gravitational effects Extra dimensions. Events. Press Office Video Selection. Press Office Photo Selection.
Caltech. David Hilbert. ATLAS Experiment. Items where Subject is "General Issues > History of Philosophy of Science" An Archive for Preprints in Philosophy of Science - PhilSci-Archive. Herman J. Bierens. Professor Emeritus of Economics Pennsylvania State University University Park, PA 16802 E-mail: firstname.lastname@example.org. Untitled. Technical publications. Renaissance Body Project. CCARH Homepage.