480 research outputs found
Application of simulations to thermodynamic properties of materials for magnetic refrigeration: A calorimetric approach to material’s magnetocaloric parameters
A magnetic refrigeration system is a complex system that involves the magnetocaloric effect (MCE) and the heat transfer problems working in a coupled manner. For this purpose, characterization of materials showing MCE is needed. Calorimetric characterization allows the obtention of thermodynamic variables needed for a precise quantification of this effect. More specifically, in systems with continuous magnetic field variation, in order to calculate the heat generation due to MCE, the knowledge of their magnetocaloric parameters—adiabatic temperature change (Formula presented.) and isothermal entropy change (Formula presented.)—and the heat capacity (Formula presented.), for every temperature and magnetic field present is needed. In this work, (Formula presented.) family materials have been either characterized or interpolated and used in numerical simulations in COMSOL Multiphysics™ software. The characterization was carried out with measurements of (Formula presented.), (Formula presented.) and (Formula presented.) and the calculation of other derived parameters, at different temperatures and magnetic fields
Identificación y chequeo de parentesco en la especie canina mediante análisis de ADN
Este trabajo presenta los primeros resultados en España de un estudio de identificación y chequeo de parentesco en la especie canina mediante microsatélites (polimorfismos del ADN). Para este trabajo se han utilizado 79 animales, 48 de los cuales no están emparentados y 31 que pertenecen a 3 familias, en los que Se han analizado 11 microsatélites. Los resultados indican la posibilidad de utilizar estos marcadores en test de paternidad con resultados altamente fiables (99%), si se utilizan más de 7 microsatélites.This work presents the first results in Spain of an study concerning identity and parentage test in dogs by microsatellites (ONA polymorphisms). 79 animals have been used for this work, (48 unrelated dogs and 31 dogs from 3 families). Our main conclusion is the necessity of using more than 7 microsatellites in arder to obtain results with 99% of garanty
Heatmaps in soccer: event vs tracking datasets
We investigate how similar heatmaps of soccer players are when constructed
from (i) event datasets and (ii) tracking datasets. When using event datasets,
we show that the scale at which the events are grouped strongly influences the
correlation with the tracking heatmaps. Furthermore, there is an optimal scale
at which the correlation between event and tracking heatmaps is the highest.
However, even at the optimal scale, correlations between both approaches are
moderate. Furthermore, there is high heterogeneity in the players' correlation,
ranging from negative values to correlations close to the unity. We show that
the number of events performed by a player does not crucially determine the
level of correlation between both heatmaps. Finally, we analyzed the influence
of the player position, showing that defenders are the players with the highest
correlations while forwards have the lowest.Comment: 6 pages, 5 figure
Impacto del género y la responsabilidad social en la rentabilidad empresarial cuando se controlan los recursos estructurales e intangibles
El objetivo de este trabajo es analizar los factores explicativos de la rentabilidad empresarial, considerando nuevas perspectivas respecto a las que tradicionalmente han sido constatadas como explicativas del rendimiento empresarial. En concreto, estudiamos en qué medida el género y la responsabilidad social de una empresa puede tener efectos positivos sobre la rentabilidad cuando se consideran simultáneamente los recursos estructurales e intangibles de la empresa. Utilizando la metodología de datos de panel para una serie temporal de seis años, en la que se combina información económica e información obtenida a través de un cuestionario, los resultados constatan que ni el género de los empresarios ni las prácticas de responsabilidad social son estadísticamente significativos para explicar las diferencias en la rentabilidad pero sí lo es la aplicación de medidas de igualdad, de modo que aquellas empresas que muestran mayor preocupación por las políticas de igualdad pueden tener un efecto positivo sobre su rendimiento
Measuring Spatial Subdivisions in Urban Mobility with Mobile Phone Data
Urban population grows constantly. By 2050 two thirds of the world population
will reside in urban areas. This growth is faster and more complex than the
ability of cities to measure and plan for their sustainability. To understand
what makes a city inclusive for all, we define a methodology to identify and
characterize spatial subdivisions: areas with over- and under-representation of
specific population groups, named hot and cold spots respectively. Using
aggregated mobile phone data, we apply this methodology to the city of
Barcelona to assess the mobility of three groups of people: women, elders, and
tourists. We find that, within the three groups, cold spots have a lower
diversity of amenities and services than hot spots. Also, cold spots of women
and tourists tend to have lower population income. These insights apply to the
floating population of Barcelona, thus augmenting the scope of how
inclusiveness can be analyzed in the city.Comment: 10 pages, 10 figures. To be presented at the Data Science for Social
Good workshop at The Web Conference 202
Necesidades de orientación profesional de los estudiantes y titulados de la Universidad Jaume I
XII Jornades de Foment de la Investigació de la FCHS (Any 2006-2007)Cuando hablamos de la situación actual del mercado laboral, uno de los temas de preocupación es el referido
a cómo logramos introducirnos por primera vez en el mercado laboral y cómo reinsertarnos en él a lo largo
de la vida. El modo de encontrar empleo va a depender no sólo de las habilidades y estratégias que poseamos,
sino del conocimiento del que dispongamos acerca de la búsqueda de empleo.
Siguiendo esta línea en orientación profesional, uno de los objetivos del área de Inserción Profesional de
la Oficina de Cooperación Internacional y Educativa (OCIE) es la potenciación de los recursos propios del
usuario y la adquisición de nuevas competencias para la búsqueda de empleo.
El objetivo de este trabajo es explorar, mediante un análisis cluster, los diferentes patrones de necesidades de
orientación profesional que existen, a partir de las necesidades que estos usuarios comunican en el servicio
y teniendo en cuenta ciertas variables.
La muestra está compuesta por 386 sujetos asistentes a las acciones de Orientación para el Empleo y el
Autoempleo (OPEA) durante los meses de julio a diciembre 2006 y enero y febrero de 2007. Estos usuarios
transmiten a los técnicos encargados de su orintación sus necesidades de formación (ya sea currículum vitae,
carta de presentación, recursos...etc), a partir de aquí y teniendo en cuenta variables como el sexo, el tipo
de acceso al servicio, experiencia laboral previa...etc se lleva a cabo el anàlisis. Los resultados indican que
existen patrones diferenciados dependiendo de las necesidades de formación emitidas.
Las aplicaciones prácticas y limitaciones de este estudio también son expuestas
Empty Urbanism: the bursting of the Spanish housing bubble
The depth of the Spanish housing crisis manifests itself in the collapse of construction activity and in the amount of housing and land stocks. The geography of the crisis shows its widespread nature, and the intensity of the previous bubble explains spatial differences. Resulting from this collapse are some problematic areas of 'empty urbanism'. An enormous land bubble, emerging from the peculiar Spanish urban development model, was a key factor in the impacts - caused by the crisis - on the territory and land-use plans. The crisis has demonstrated the unsustainability of this and the urgency of change in the existing land-use plans
The challenges and possibilities of reflective learning in higher education. Research focused from the perspective of university students on four different degree courses
Despite an increase in university teaching practices based on reflective learning methodology (RL),
only very few studies are found in the context of higher education aimed at determining students?
perception of this approach to teaching and learning. The aim of this research was to ascertain the
opinions of students on different university degree courses regarding the challenges, difficulties and
contributions arising from the application of reflective learning methodology in their learning process
so as to propose strategies for improving education. The study was carried out on four Bachelor
degree courses at the University of Girona: Social Education, Environmental Sciences, Nursing and
Psychology.
The research was conducted in two stages. In the first (2011-12 academic year), a questionnaire was
administered to 162 students (43 from Social Education; 33 from Environmental Sciences; 31 from
Nursing; and 55 from Psychology). One section of the questionnaire was specifically devoted to
studying the perceptions of students participating in various RL experiences regarding the main
difficulties they faced and the contributions of the RL to their learning process. Among the highlighted
difficulties was the fact that RL requires a work process they are not used to and their lack of reflective
writing skills. Among the contributions, the students felt that RL results in more complex and selfregulated
knowledge, develops greater dynamic capabilities and increases the degree of reflection on
learning processes and areas for improvement. In the second stage of the study (2012-13 academic
year), four focus groups were held with students who had participated in the previous years?
experience with the aim of gaining further insight into their perceptions regarding the challenges and
contributions of RL. A total of 20 students participated, all of whom gave informed written consent. The
sessions were recorded and transcribed in full and a thematic content analysis was performed. In all
four groups the students stated that the experience had allowed them to improve their learning and
become aware of their current situation and areas for improvement. As for the challenges, they cited
difficulties in understanding the aims and purpose of RL, particularly at the beginning of the
experience, together with problems experienced in writing about it, doubts about the level of openness
required and uncertainty about how they would be assessed.
The research conducted suggested that RL has significant potential to connect academic activity with
professional action. It also provided working guidelines for improving experiences carried out on the
basis of RL. These include the need to clarify the methodology and present arguments for its use, so
that students understand the type of work it will mean for them and the objectives they pursued.
Students should also be provided with sufficiently clear guidelines regarding how they will be
assessed (in relation to both activities and level of reflection). There is a need to build a group climate
based on mutual trust, continuous feedback and the establishment of a support process that maintains
this trust throughout the learning process
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