Search results for "version"

El rendimiento de las inversiones educativas en Espana

1993

International audience; Este artículo estudia la distribución individual de los satarios en España y presenta distintos ajustes de la función generadora de ganancias, en el marco de la teoría del capital humanv. Las tasas de rendimientos del capital humano que obtenemos se fundamentan en los datos de la encuesta de Presupuestos Familiares realizada en 1980-81 por el Instituto Nacional de Estadística

Self-efficacy in volleyball: What has been evaluated? A systematic review

2019

Self-efficacy in sport has been the object of study in different modalities, including volleyball. The aim of the present study was to verify, by means of a systematic review, what has been evaluated in volleyball self-efficacy studies. The APA, PsycInfo, Bireme, Eric, Science Direct, Pubmed and Scopus databases were used to carry out the search. After the search, the articles were selected using the inclusion and exclusion criteria, resulting in 7 articles. The results point to a lack of clarity in the instruments for assessing self-efficacy in volleyball, with regard to the technical, tactical, physical or psychological attributes they are designed to measure. Few articles have described …

Influencia de la satisfacción y el valor percibido sobre el “Word of Mouth” en los usuarios de centros deportivos

2019

Uno de los principales objetivos de los servicios deportivos, es fidelizar a los usuarios el mayor tiempo posible en dicho servicio. Por ello, desde el inicio de la literatura de la gestión del deporte, que analizan las diferentes variables de gestión, cada vez más, aparecen trabajos que tratan de aportar información relacionada con este objetivo. Dentro de las inten- ciones futuras de los usuarios, la recomendación es uno de los factores claves para poder analizar los futuros comportamientos de dichos usuarios. Por ello este trabajo, trata de analizar cuál es la influencia de la satisfacción y el valor percibido de los usuarios, sobre el “Word of Mouth” (boca-oído), es decir, como influyen…

Opciones estratégicas diferenciadas de la IEDE europea y estadounidense en Argentina durante los años noventa

2004

El marco analítico aplicado al análisis de las motivaciones de la Inversión Extranjera Directa (IED) muestra que, dependiendo del carácter horizontal o vertical de las estrategias asociadas a las Empresas Transnacionales (ET), la IED puede tener impactos diversos sobre los flujos de comercio. En este sentido, el objetivo del presente trabajo se centra en tratar de identificar las diferencias internas existentes entre los procesos de IED, a través del estudio de su impacto sobre el comercio para las dos principales áreas económicas inversoras en el mercado argentino, la UE y EE UU. La estimación se ha realizado con datos sectoriales para la década de los noventa, aplicando un modelo de panel…

Testing for a Political Bias in Freedom House Democracy Scores: Are U.S. Friendly States Judged To Be More Democratic?

2012

Several scholars have criticized the Freedom House democracy ratings as being politically biased; do countries indeed incorrectly receive better ratings that have stronger political ties with the United States? Starting from the assumption that other indices of democracy can be used as benchmark data, different estimation strategies are employed to gauge whether differences between a number of alternative indices of democracy and the FH ratings can be explained in a systematic manner by variables that record relationships between the U.S. and the countries under investigation. Differentiating between the period before 1989 and after 1988, I obtain consistent evidence of a substantial bias i…

Potential determining salts in microemulsions: interfacial distribution and effect on the phase behavior.

2013

In this work we consider potential determining salts, also referred to as phase transfer agents for a future objective of electrochemistry at the oil-water interface in microemulsions. We have studied these salts, composed of a hydrophilic and a hydrophobic ion, in microemulsion stabilized by nonionic surfactants with an oligo ethylene oxide headgroup. NMR measurements show that the salts preferentially dissociate across the surfactant interface between the oil and water domains, and hence create a potential drop across the surfactant film, and back to back diffuse double layers in the oil and water phases. These observations are also supported by Poisson-Boltzmann calculations. This adsorp…

Tetrakis{[(p-dodecacarboranyl)methyl]stilbenyl}ethylene: A Luminescent Tetraphenylethylene (TPE) Core System

2017

The synthesis and spectroscopic characterization of the first set of tetra(p-dodecacarborane-stilbeno)ethylenes (TDSE), substituted either with a methyl or phenyl group in the 2-position (Ccluster) of the ortho-carborane, are described. The complex absorption properties are elucidated by TD-DFT calculations, stressing the importance of through bond conjugation. Enhanced conjugation and restriction of the conformational space are identified as the main factors for boosted luminescence properties in solution compared to tetraphenylethylene (TPE) core, effectively reducing internal conversion (IC). IC is further reduced when aggregate suspensions of our compounds in water are formed, providing…

On the power and the systematic biases of the detection of chromosomal inversions by paired-end genome sequencing

2013

One of the most used techniques to study structural variation at a genome level is paired-end mapping (PEM). PEM has the advantage of being able to detect balanced events, such as inversions and translocations. However, inversions are still quite difficult to predict reliably, especially from high-throughput sequencing data. We simulated realistic PEM experiments with different combinations of read and library fragment lengths, including sequencing errors and meaningful base-qualities, to quantify and track down the origin of false positives and negatives along sequencing, mapping, and downstream analysis. We show that PEM is very appropriate to detect a wide range of inversions, even with …

INNOVATIVE APPLICATIONS OF EXERGY ANALYSIS AND THERMOECONOMICS IN CHEMICAL, THERMAL AND COOLING ENERGY CONVERSION SYSTEMS

Since 70s, the world has been becoming more and more concerned about energy and environmental issues. The need of meeting the current energy demand by guaranteeing the ability of future generation to satisfy theirs have been pushing research not only to exploit alternative energy sources such as renewable energies, but also to improve the efficiency of energy conversion systems. To this regard, developing systems that use efficiently energy is of paramount importance especially in those countries which rely on non-renewable energy sources such as oil, natural gas, and coal. In fact, the reduction of energy consumption will lead not only to the saving of unrestorable and limited energy resou…

Reverse electrodialysis heat engine with multi-effect distillation: Exergy analysis and perspectives

2019

Abstract The increasing worldwide energy demand is rising the interest on alternative power production technologies based on renewable and emission-free energy sources. In this regard, the closed-loop reverse electrodialysis heat engine is a promising technology with the potential to convert low-grade heat into electric power. The reverse electrodialysis technology has been under investigation in the last years to explore the real potentials for energy generation from natural and artificial solutions, and recent works have been addressing also the potential of its coupling with regeneration strategies, looking at medium and large energy supply purposes. In this work, for the first time, a c…