Aporte de variables cognitivo-motivacionales en la implementación de un foro electrónico: caso de la asignatura Termodinámica

The use of technological tools in teaching engineering and technology careers require considering the individualities of the subjects and assimilate the implications of the fact that not everyone will receive it in the same way the incorporation of new assignments. This research was aimed to analyze the performance achieved in a given electronic forum, based on different learning styles. A total of 34 students who took thermodynamics during the trimester April- July/2011 participated in the study, which 4 (11.8%) were women and 30 (88.2 %) were male. It consisted with the distribution of men and women belonging to these technological careers at Simon Bolívar University. The Learning Styles Questionnaire (CHAEA) was applied and an evaluation of the concepts of work and heat were done through the use of the "Osmosis" platform. Correlational analyses were performed related to the performance obtained in the activity, showing significant results for the active, thoughtful, and pragmatic learning styles. These results are consistent with the Social Cognitive Theory and they represent sychoeducational guidelines for the implementation of teaching methods which involve the use of computer guided technologies and considering the differences among the individual learners.El uso de las herramientas tecnológicas en la enseñanza de la ingeniería y carreras tecnológicas requiere considerar la individualidad del sujeto y asimilar las implicaciones que tiene el hecho de que no todos recibirán de la misma manera la incorporación de asignaciones novedosas. Esta investigación tuvo por objetivo analizar el rendimiento obtenido en una evaluación dada en un foro electrónico, en función de los estilos de aprendizaje. Participaron 34 estudiantes cursantes de la asignatura termodinámica durante el trimestre abril- julio/2011, de los cuales 4 (11,8%) eran mujeres y 30 (88,2%) hombres, lo cual es consistente con la distribución de hombres y mujeres pertenecientes a estas carreras tecnológicas en la Universidad S imón Bolívar. Se aplicó el Cuestionario de Estilos de Aprendizaje (CHAEA) y una evaluación sobre los conceptos de trabajo y calor a través de la plataforma “Osmosis”. Se realizaron análisis correlacionales con relación al rendimiento obtenido en la actividad, mostrando resultados significativos para los estilos activo, reflexivo y pragmático. Estos resultados son consistentes con la Teoría Social Cognitiva y representan orientaciones psicoeducativas para la aplicación de metodologías de enseñanza que involucren el uso de tecnologías mediadas por la computadora y consideren las diferencias ind ividuales de los aprendices

Análisis crítico de la Directiva 2014/95/EU sobre Responsabilidad Social Corporativa

La Responsabilidad Social Corporativa cada vez tiene un papel más importante en las empresas y la sociedad. Con la entrada en vigor de la Directiva Europea 2014/95/EU se ha conseguido un aumento del número de empresas que presentan informes de RSC, pero vamos a estudiar si verdaderamente, ha servido para mejorar la calidad de la información y cómo ha adaptado cada país la norma, pasando desde los países más estrictos a los más laxos, para ver si esto afecta a la calidad de la información.Universidad de Sevilla. Grado en Finanzas y Contabilida

Does Education Affects Attitudes Towards Marijuana Legalization?

Research concerning marijuana has been more focused on the health and social consequences of its use. This paper presents a political and public policy approach and focuses on its legalization. This study makes an analysis of public opinion regarding marijuana legalization in the United States. The proposed hypothesis claims that high education level would be correlated with positive attitudes towards legalization. A regression model has been taking data from the General Social Survey has been developed. The model is run four times using data from four different years to verify if the relation between the dependent and the independent variables remains constant over time. The results show that a higher level of education increases the probability of people being in favor of legalization. The regression model also shows that other variables besides education are statistically significant regarding legalization

Una cala en el Romancero de tradición oral que se canta hoy en Cuba y República Dominicana.

Este trabajo pretende dar noticia de dos breves encuestas de campo realizadas recientemente en determinadas regiones de Cuba y de Santo Domingo. Los resultados obtenidos, altamente satisfactorios en ambos casos, muestran, a mi modo de ver, la necesidad de continuar la búsqueda de romances tradicionales en éstas y en otras regiones de la América de habla hispana, escasamente investigadas en comparación con otras áreas del Romancero pan-hispánico

La Termodinámica en los estudiantes de tecnología : una experiencia de aprendizaje cooperativo

Se describe el uso de la estrategia de aprendizaje cooperativo en la resolución de problemas basados en la primera ley de la termodinámica. Participaron 33 estudiantes de las carreras de Tecnología Mecánica y Mantenimiento Aeronáutico de la Universidad Simón Bolívar. Se describe la estrategia en función de dos indicadores: calidad en la resolución y trabajo grupal. Los estudiantes lograron en promedio resolver en más de un 70,90% los problemas de sistemas mecánicos y aeronáuticos planteados, y un 69,09% de ellos consideraron satisfactorio el desempeño en el trabajo grupal. Las respuestas mostraron dominio de las nociones básicas del tema, conceptos asociados y la habilidad para aplicarlos en un contexto relacionado con su área de formación. Se concluye que con la estrategia los estudiantes participaron activamente en la presentación de soluciones y autoevaluaron su dominio del tema. Es ideal para trabajar con un gran número de estudiantes y minimizar el solapamiento de responsabilidades cuando se trabaja en grupos.To describe the use of cooperative learning strategies in the solution of problems based on the First Law of Thermodynamics. Participated 33 students of mechanical and aeronautical maintenance technology degree courses from the Simon Bolivar University. Describes the strategy in terms of two indicators (quality in resolution and group work). Students achieved on average more than solve 70.90% of problems of mechanical and aeronautical raised, and 69.09% considered satisfactory performance in group work. The responses showed their command of the basics of the topic, related concepts and the ability to apply them in a context related to their area of training. We conclude that the strategy students actively participated in the presentation of solutions and self-assessed their knowledge of the subject. It is ideal for working with large numbers of students and minimize the overlap of responsibilities when working in groups

The inclusion of the performance sensitive debt in an emerging Economy – COLOMBIA

Execituve Summary. Introduction. The virtues of the inclusión of the Performance Sensitive Debt contract in the financing market. The Performance Sensitive Debt in the real sector. Colombia’s business sector. Conclusions. Bibliography. Graphics. Tables.Administrador de EmpresasThe performance sensitive debt is an exotic kind of debt, in which the interest rate is going to be fluctuating based on the financial ratios of the borrowers. The objective of the paper is to analyze an emerging market, as Colombia and the performance sensitive debt, remarking their virtues and disadvantages, to have in a conclusion how viable is in the short, medium and long term the inclusion of the performance sensitive debt.Pregrad

Economic effects of road accessibility in the Pyrenees: user perspective

At present, Spain faces one of the key moments in planning the future design of the infrastructure network. As a consequence of the critical role played by haulage in intra-European trade, the most important investments are those that guarantee that road haulage traffic can move freely at the borders. That is why it is necessary to make serious evaluations of the economic and social profitability of these investments. Normally the most significant social benefit of investment projects in transport infrastructure is time saving, which in turn changes traffic intensity. In this article we analyse the changes in the user excess caused by public investment in transport infrastructure planned by the Spanish government and which will be located on the border between Spain and France. In particular, we study the increase in network user surplus for HGV traffic in the Spanish and French border zones in the Pyrenees.Intra-European trade, time saving, user surplus, gravitational model

Estudio cinético comparativo del proceso de digestión anaerobia del alpechín en los intervalos mesofílico y termofílico de temperatura

A kinetic study of anaerobic digestion of olive mill wastewater in the mesophilic (from 30ºC to 40°C) and thermophilic (from 50ºC to 60ºC) ranges of temperature has been carried out. Two reactors containing suspended biomass were used.
 The Chen-Hashimoto substrate utilization kinetic model has been applied, obtaining the values of the maximum specific growth rate of microorganisms, μ<sub>max</sub>,. and the kinetic constant, K, for each case studied.
 The obtained results showed an increase of 55% and 34% for μ<sub>max</sub> and K, respectively, of the thermophilic anaerobic digestion process in relation to the mesophilic process.
 The substrate utilization maximum rate value was reached for the hydraulic retention times of 7,7 and 11,6 days, for the thermophilic and mesophilic processes, respectively.<br><br>Se ha efectuado un estudio cinético del proceso de digestión anaerobia del alpechín en los intervalos mesofílico (de 30ºC a 40ºC) y termofílico (de 50ºC a 60°C) de temperatura, utilizando dos reactores de lecho fluidizado con biomasa suspendida.
 Se aplica el modelo de utilización de sustrato propuesto por Chen- Hashimoto, obteniéndose los valores de la velocidad máxima de crecimiento específico de microorganismos, μ<sub>max</sub>, y de la constante cinética del proceso, K, para cada uno de los casos estudiados.
 Se obtiene un aumento de los parámetros cinéticos μ<sub>max</sub>. y K, del 55% y 34% respectivamente, en el proceso de digestión anaerobia termofílico respecto al mesofílico.
 El valor máximo en la velocidad volumétrica de utilización de sustrato se alcanza para un tiempo de retención hidráulico de 7,7 y 11,6 días en los procesos termofílico y mesofílico, respectivamente

On nonparaxial nonlinear Schrödinger-type equations

In this paper the one-dimensional nonparaxial nonlinear Schrödinger equation is considered. This was proposed as an alternative to the classical nonlinear Schrödinger equation in those situations where the assumption of paraxiality may fail. The paper contributes to the mathematical properties of the equation in a two-fold way. First, some theoretical results on linear well-posedness, Hamiltonian and multi-symplectic formulations are derived. Then we propose to take into account these properties in order to deal with the numerical approximation. In this sense, different numerical procedures that preserve the Hamiltonian and multi-symplectic structures are discussed and illustrated with numerical experiments