B Mixing and Lifetimes at the Tevatron

The Tevatron collider at Fermilab provides a very rich environment for the study of b-hadrons. Both the D0 and CDF experiments have collected a sample of about 1 fb^{-1}. We report results on three topics: b-hadron lifetimes, polarization amplitudes and the decay width difference in Bs to Jpsi Phi, and Bs mixing.Comment: Flavor Physics & CP Violation Conference, Vancouver, 200

Hironaka's characteristic polygon and effective resolution of surfaces

Hironaka's concept of characteristic polyhedron of a singularity has been one of the most powerful and fruitful ideas of the last decades in singularity theory. In fact, since then combinatorics have become a major tool in many important results. However, this seminal concept is still not enough to cope with some effective problems: for instance, giving a bound on the maximum number of blowing--ups to be performed on a surface before its multiplicity decreases. This short note shows why such a bounding is not possible, at least with the original definitions.Comment: 7 pages, 1 figur

Equimultiple Locus of Embedded Algebroid Surfaces and Blowing–up in Characteristic Zero

2000 Mathematics Subject Classification: 14B05, 32S25.The smooth equimultiple locus of embedded algebroid surfaces appears naturally in many resolution processes, both classical and modern. In this paper we explore how it changes by blowing–up.* Supported by FQM 304 and BFM 2000–1523. ** Supported by FQM 218 and BFM 2001–3207

Educando para un futuro sostenible: una aportación desde las clases de ciencias de la ESO

Se presenta una propuesta de organización de las clases de ciencias en la ESO que permite estudiar algunos de los problemas que caracterizan la crisis social y ecológica que vivimos, así como las medidas necesarias para solucionarlos. Esta orientación hacia la educación para la sostenibilidad intenta responder a los diferentes llamamientos que desde diferentes ámbitos se han venido haciendo a los educadores, especialmente a la Década de la Educación para un Futuro Sostenible, instaurada por la ONU (2005-2014)

Geographic Variation in Wood Properties of Pinus Tecunumanii

Wood properties of Pinus tecunumanii were studied on 108 trees collected from four different departments of Guatemala (Baja Verapaz, Zacapa, Totonicapán, and El Quiché). Unextracted and extracted specific gravities were calculated from 108 Cores (one per tree) of 4.5 mm diameter. The specific gravity varied from 0.51 to 0.56 with a weak decreasing trend from east to west. Most of the extractives were found in the core segment closest to the pith. Tracheid measurements were recorded on 11-mm cores from Baja Verapaz and Zacapa with tracheid length, cell-wall thickness, lumen width, and tracheid diameter being recorded. With the exception of tracheid length, all the measured cell characteristics showed highly statistical differences between locations and among trees. Most of the variation was within and between trees. Tracheid diameter and lumen width were highly correlated. The wood of the Tecun Umán pine showed extreme variability, especially in tracheid dimensions. Overall, however, the wood of this species is quite usable for both solid wood and pulp products

Global Collective Intelligence in Technological Societies: as a result of Collaborative Knowledge in combination with Artificial Intelligence

The big influence of Information and Communication Technologies (ICT), especially in area of construction of Technological Societies has generated big social changes. That is visible in the way of relating to people in different environments. These changes have the possibility to expand the frontiers of knowledge through sharing and cooperation. That has meaning the inherently creation of a new form of Collaborative Knowledge. The potential of this Collaborative Knowledge has been given through ICT in combination with Artificial Intelligence processes, from where is obtained a Collective Knowledge. When this kind of knowledge is shared, it gives the place to the Global Collective Intelligence

Women and sport in films in twenty-first century (2000-2009)

Este documento profundiza en el rol y cualidades asociadas a la mujer en el cine deportivo de la primera década del siglo XXI, objeto de estudio poco habitual en el campo de la investigación cinematográfica. Para ello, se determinó una muestra compuesta por 74 películas, seleccionadas a través de un muestreo no probabilístico por cuotas y mediante un diseño de investigación de tipo descriptivo, siendo el análisis de contenido el instrumento elegido para llevarlo a cabo. Los resultados mostraron que se reflejaba con fidelidad el modelo deportivo imperante en la actualidad, así como el canon moderno que se atribuye al sexo femenino, lo cual debería cuestionar el modelo que se muestra y perpetúa en este tipo de produccionesThis paper explores the roles and qualities of women in sport films from the first decade of the twenty-first century, which is an unusual subject of study in the field of film research. For this purpose we analysed a sample of 74 films that were selected through a non-probability quota sampling and using a descriptive investigation model. The sample was determined by way of content analysis. The results showed that the films reflected the current sports model, as well as the modern female stereotypes. This should help to question the current model shown in these types of film