Constructive approximations to the q=1/2 maximum entropy distribution from redundant and noisy data

An approach adopted to consider the problem of constructing the q=1/2 maximum entropy distribution from redundant and noisy data was discussed. The advantage of this generalized approach, when dealing with very noisy data was illustrated by a numerical simulation. A strategy was proposed that evolved through different steps such as independent constraints were first preselected by recourse to a data independent technique. A backward approach was also proposed for reducing the parameters of such distributions. It was found that the sub-optimal strategies could be utilized in a broad range of situations

Relationship between rules and technical and tactical contents in minibasket

Las reglas condicionan el desarrollo del juego en cualquier deporte ya que delimita lo que se puede hacer. Se pretende conocer el orden de importancia de las reglas en minibasket, así como los medios técnico-tácticos que se derivan éstas. El método utilizado para la toma de datos ha sido el grupo nominal. Los participantes han sido siete expertos que cumplían unas condiciones mínimas. Con relación a la primera pregunta, el orden de importancia de las reglas ha sido: los pasos, dobles, líneas delimitadoras, faltas, árbitro, reglas de tiempo y puntuación. Con relación a los medios técnico-tácticos que se derivan de las reglas más importantes, a modo de ejemplo, a través de los pasos se aprende el bote, las arrancadas, las paradas, entradas, etc. Estos datos permiten organizar una programación basada en las reglasThe rules determine the development of the game in every sport because they put a limit to what you can do and what not. The aims of the research were to determine the order of importance of the basic basketball rules as well as the technical and tactical contents deriving from these rules. The method used for the data collection was that of the nominal group technique. The nominal group consisted of seven experts who fulfilled the minimum conditions. Regarding the first question, the order of importance of the rules was: steps, double dribble, lines, fouls, referee, rules regarding time limits and score. With regard to the technical and tactical contents deriving from the most important rules, for example, through the steps’ rules, players can learn starts, stops, lay-up, etc. These data allow organizing a program based on the rule

Metodología para seleccionar tecnologías Web 2.0 para la docencia

Actualmente existe un gran auge en el uso y difusión de las herramientas Web 2.0 tanto en el contexto profesional como en el personal. Su aplicación al ámbito de la docencia, tal y como sugieren algunos estudios, puede tener numerosas ventajas. Sin embargo, el abanico de herramientas Web 2.0 es muy amplio y por tanto sería de utilidad disponer de una metodología que pudiera guiar al docente a la hora de elegir la tecnología más adecuada a su proceso de enseñanza-aprendizaje según los objetivos perseguidos, así como en su implantación y posterior evaluación de los resultados alcanzados. En este artículo, se presenta una metodología de ayuda a los docentes de cualquier área de conocimiento para la selección e implantación de la tecnología Web 2.0 que más se adapte a un determinado proceso de enseñanza-aprendizaje en base a criterios docentes y técnicos. Esta metodología es el resultado de un proyecto de mejora e innovación educativa en el cual se han llevado a cabo diversas experiencias docentes sobre la aplicación de herramientas Web 2.0 en asignaturas de distintas titulaciones universitarias.SUMMARY -- The use and dissemination of Web 2.0 tools in professional and personal context is becoming more popular every day. Its application to teaching, as it is suggested by some studies, may have numerous advantages. However, the range of Web 2.0 tools is very broad and it would therefore be useful to have a methodology that guide the teacher in choosing the most appropriate technology to their teaching-learning process, taking into account some final objectives, as well as implementing and evaluating the achieved results. This paper presents a methodology to assist teachers from any area of knowledge in the selection of the Web 2.0 technology that best suits a particular teaching-learning process. This selection is based on some educational and technical criteria. The presented methodology is the result of an educational innovation and improvement project in which various teaching experiences based on the use of Web 2.0 tools have been carried out in different subjects of science degrees.Peer Reviewe

Mixing and transport of water in a karst catchment: a case study from precipitation via seepage to the spring

One of the best-known and largest karst areas in Germany, the Blautopf Catchment, offers unique access to waters of the unsaturated zone through a large cave system. It was investigated with stable isotopes (<sup>18</sup>O/<sup>16</sup>O and D/H ratios expressed in permille = ‰) in precipitation, seepage- and groundwater as tracers for water flow, mixing, and storage. The precipitation showed a distinct seasonality with δ<sup>18</sup>O values between −2.9 and −24.6‰ during summer and winter, respectively. However, the isotope signals in seepage water in the caves as well as the discharge were almost completely buffered and ranged around an average δ<sup>18</sup>O value of −10‰. This value was also close to the long-term average value of local precipitation, −9.3‰. The homogeneous isotopic composition of the Blautopf Spring was unexpected, as its highly variable discharge (0.3 to 32 m<sup>3</sup> s<sup>−1</sup>) is typical for a fast responsive karst system. These isotopic similarities could be explained by nearly complete mixing of the water already in the vadose zone. The data set therefore presents a case study to narrow down zones of mixing in karst catchments. It also confirms the minor role of the fast conduit system in the water balance of the Blautopf Catchment

Implementation of a moving finite element mesh within the catenary-pantograph dynamic interaction

En este artículo se presenta la aplicación tecnológica a la interacción dinámica catenaria-pantógrafo de una metodología propuesta para estructuras flexibles sometidas a cargas móviles. En primer lugar se describe el modelado de una malla móvil de elementos finitos que se desplaza sobre el hilo de contacto de forma solidaria al pantógrafo que recorre la catenaria y, posteriormente, se presenta la comparación de esta metodología frente a un modelo de elementos finitos convencional de malla fija. El caso simulado corresponde al propuesto por la norma EN-50318, obteniendo resultados acordes a los intervalos de validación propuestos por dicha norma. La principal ventaja del método de malla móvil reside en que para precisiones análogas el tiempo de cálculo es del orden de 4 veces menor que el modelo clásico.This paper presents a technological application of a general methodology to analyze cable structures under moving loads, particularly on the catenary-pantograph dynamic interaction. This work firstly describes the modeling of a finite element moving mesh which integrally moves over the contact wire following the pantograph along the whole catenary, prior focusing on its comparison against the classical finite element mesh. The case study corresponds to the standard EN-50318 one, whose results fulfill the ranges proposed by this validation rule. The main advantage of the moving mesh method is presented in the falling of computational costs about 4 times lower than the classic model with similar precision.Peer Reviewe

Simulation of moving loads on structures using a moving finite element mesh

En este artículo se presenta una metodología para analizar la respuesta dinámica de estructuras sometidas a cargas móviles. Para ello se ha desarrollado un algoritmo de mallado adaptativo de elementos finitos que se mueve de forma solidaria a la carga móvil que actúa sobre la estructura. El algoritmo de mallado móvil se ha validado con la solución analítica de una carga móvil que recorre una viga simplemente apoyada.This paper presents a methodology to analyze the dynamic behavior of structures under moving loads. A finite element moving mesh algorithm has been developed in order to integrally move a part of the mesh following a moving load. This algorithm has been validated with the analytical solution of a moving load applied on a simply supported beam.Peer Reviewe

Las silvas como medio expresivo en pasajes marítimos de los autos de Calderón de la Barca

El presente artículo tiene la finalidad de demostrar que las silvas pareadas tienen un vínculo expresivo con pasajes marítimos. Para ello, se centra en el estudio de cinco autos de Pedro Calderón de la Barca. Esta forma poemática tiene una estructura libre en cuanto a su extensión, pues la disposición de heptasílabos y endecasílabos responde al uso discrecional del dramaturgo. Esta característica hace que las silvas pareadas sean adecuadas para los pasajes marítimos, sea en momentos de calma o tempestad. Calderón puede incluir una menor o mayor cantidad de heptasílabos en la tirada de silvas, según sea el caso. En este sentido, considero que la forma métrica está en función de la acción y sirve en su conjunto para potenciar la expresión dramática.The present article attempts to prove that silvas pareadas have an expressive link with maritime passages. The autor studies fi ve autos sacramentales by Pedro Calderón de la Barca. This poetic form has a free structure in terms of extension: it has no limits of strophes. This characteristic makes silvas pareadas suitable for maritime passages. Calderón can include a smaller or higher quantity of heptasyllabic verses according to the case. The autor therefore argues that this metric form varies according to the action and enables the autos to reach intense dramatical expression

Assortative human pair-bonding for partner ancestry and allelic variation of the dopamine receptor D4 (DRD4) gene

The 7R allele of the dopamine receptor D4 gene has been associated with attention-deficit hyperactivity disorder and risk taking. On the cross-population scale, 7R allele frequencies have been shown to be higher in populations with more of a history of long-term migrations. It has also been shown that the 7R allele is associated with individuals having multiple-ancestries. Here we conduct a replication of this latter finding with two independent samples. Measures of subjects’ ancestry are used to examine past reproductive bonds. The individuals’ history of inter-racial/ancestral dating and their feelings about this are also assessed. Tentative support for an association between multiple ancestries and the 7R allele were found. These results are dependent upon the method of questioning subjects about their ancestries. Inter-racial dating and feelings about inter-racial pairing were not related to the presence of the 7R allele. This might be accounted for by secular trends that might have substantively altered the decision-making process employed when considering relationships with individuals from different groups. This study provides continued support for the 7R allele playing a role in migration and/or mate choice patterns. However, replications and extensions of this study are needed and must carefully consider how ancestry/race is assessed