outreach site Math Physical Astronomy Didactics Reflections Recreational Books Links All items From the year 2015 From the year 2014 From the year 2013 From the year 2012 From the year 2011 From the year 2010 From the year 2009 From the year 2008 From the year 2007 From the year 2006 From the year 2005 From the year 2004 From the year 2003 From the year 2002 From the year 2001 From the year 2000 From the year 1999 From the year 1998 From the year 1997 Virtual books by Professor Joaquín GONZÁLEZ ÁLVAREZ - Science, Literature, Art and ... Philosophy - Selected Topics on Physics and the concept of reality - Chaos, Fractals, Strings and scientific reasoning Physical. Poincaré Seminar All session texts, in English or French Organized by the Bourbaki Collaborators Association ALEPH SUB CERO Revista de Divulgación Department of Mathematics and Physics Universidad Nacional Experimental del Táchira_UNET APOD _Astronomy Picture of the Day Daily astronomical images provided by this NASA service INSTITUTO DE ASTROFISICA DE CANARIAS http://www.iac.es/gabinete/index.htm IAC Latest Updates January 17, 2015: About Penrose and the three worlds of reality, by Joaquín GONZÁLEZ ÁLVAREZ Sir Roger Penrose (8-8-31 England) is currently one of the most prestigious and well-known scientists in the physical-mathematical and astrophysical field, mainly in relation to the subject of black holes and the origin and evolution of the universe, on which has developed strong hypotheses, many in collaboration with Stephen Hawking as well as collaborating with him in the authorship of scientific texts and rigorous dissemination. In recent years he has devoted himself to research and hypothesis of powerful internal logic about the mind and consciousness. January 17, 2015: Perspectives on the new materials of the XXI century, by Gonzalo GONZALEZ Materials are so closely linked to the activity of man that some stages of humanity have been described in terms of the technical handling that some of them would have: we then went through the era of stone, bronze, iron, silicon and currently by the age of nanomaterials. The latter due to the new applications that these materials are beginning to have. Whatever the name of the predominant material that the 21st century will have, the truth is that these materials will have to do with the answers to the enormous scientific challenges that this century imposes. January 17, 2015: On the algebraic ring structure. Characteristic of a ring Among the mathematical structures that make up abstract algebra, the ring structure is very useful, as a set endowed with two internal laws subject to very general conditions. In this article we examine the basic definitions of ring and sub-ring to focus on the idea of characteristic and its more elementary implications. January 17, 2015: Current Mathematicians. George Lusztig, on group representation theory Lusztig has received great honors for his many contributions. In addition to being invited to address the International Congress of Mathematicians in Vancouver in 1974, he was invited to give a plenary lecture at the International Congress of Mathematicians held in Kyoto, August 1990, giving the methods of cohomology an orientation towards the theory of mathematics. representation. January 17, 2015: Gamow, Alpher and the Ylem, by Miguel ÁNGEL PÉREZ TORRES Gamow had been the first to suggest that the primordial universe was composed of a ylem (that is, 'primordial material' in Greek), which would consist solely of neutrons at temperatures of ten billion degrees. Gamow also proposed that it should be possible to detect residual radiation from the Big Bang. Gamow calculated that, having traversed the universe from its inception to the present, radiation should be detected in the microwave band. He even suggested that the Bell Labs antenna in Holmdel could serve that purpose. January 17, 2015: Gamma ray bursts. Pillars and uncertainties, by Alberto J. CASTRO TIRADO El 2 de julio de 1967 tuvo lugar la primera detección de una explosión cósmica de rayos gamma (GRB) por parte de los satélites Vela4A y Vela4B, y el 3 de julio de 1969 fue localizado por primera vez un GRB de manera precisa (pocos grados de error), por los Vela5A y Vela5B. Los satélites soviéticos también registraron los destellos, pero si los militares americanos tardaron varios años en pasarle los datos a los científicos, más aún se demoraron sus colegas del otro lado del telón de acero. 17 enero 2015: Observación astronómica en enero 2015, por Germán PUERTA RESTREPO Ahora podemos observar el firmamento a simple vista, con binoculares y telescopios, en ambos hemisferios. En el Norte, Orión, Tauro, las Pleyades, el cúmulo de estrellas del Pesebre en Cancer, Marte en Gemini y la Osa Mayor. En el Sur el Can Mayor, la Nebulosa de Orión, la Gran Nube de Magallanes y la Cruz del Sur. Además el Cometa 2014 Q2 Lovejoy se está observando con binoculares, hacia la constelación Lepus en este mes de Enero. 17 enero 2015: Novedades bibliográficas - Matemática - Física - Astronomía APUNTES, MANUALES Y LIBROS VIRTUALES EN LA RED (Obras a texto completo) In this Section there are Notes, Manuals and Books that can be downloaded from the Internet, in full text, very useful for those who study degrees in Physics or Mathematics. 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