Search results for " Capa"

A microeconometric analysis of the springboard subsidiary: The case of Spanish firms

2015

Abstract This paper provides a microeconometric analysis of the distinctive characteristics of springboard subsidiaries that have a positive impact on the subsidiaries’ performance. Based on panel data estimations for subsidiaries of European multinational companies with a presence in Spain, the authors found that if the subsidiary is located in the springboard country, then the performance improvement (increase in profit margin) of the subsidiary is about 49 percentage points. When the Spanish subsidiary is considered a springboard subsidiary, its performance is 7.7 percentage points higher than the performance of other subsidiaries that are not springboard subsidiaries. If the subsidiary …

Diseño y aplicación de un instrumento para valorar la demanda cognitiva de problemas de matemáticas resueltos por estudiantes de enseñanza obligatori…

2018

Esta investigación está inducida por la necesidad de diseñar buenas prácticas docentes para atender a los estudiantes con altas capacidades matemáticas (aaccmm). Esta necesidad nos incitó a buscar una herramienta que dotara al profesorado de técnicas de intervención para la atención de este alumnado. Para ello, tratamos de utilizar el modelo de demanda cognitiva, considerado un instrumento relevante para la valoración de tareas. Las dificultades que encontramos cuando empezamos a aplicar dicho modelo en nuestras experimentaciones nos llevaron a mejorar el modelo de demanda cognitiva. En resumen, el objetivo general de esta investigación consiste en proporcionar una herramienta que permita a…

Vita buona, capacità e multiculturalismo. Alcuni aspetti della proposta pedagogica di Martha Craven Nussbaum

2016

L’articolo presenta e sviluppa il nesso tra multiculturalismo ed educazione nell’itinerario teoretico di Martha Nussbaum. Muovendo da un approfondimento dei suoi studi sull’etica aristotelica e mettendo in luce l’antropologia in essa implicata, vengono considerati la versione specifica offerta da Nussbaum dell’approccio delle capacità e i suoi contributi sull’educazione delle emozioni e sull’immaginazione morale. Tutti questi aspetti vengono visti come il terreno fertile in cui si è sviluppata la proposta pedagogica di un’autentica educazione interculturale offerta dall’autrice.

ELECTROCHEMICAL FABRICATION OF METAL/OXIDE/CONDUCTING POLYMER JUNCTIONS FOR ELECTRONIC DEVICES

2014

The effect of hydration layers on the anodic growth and on the dielectric properties of Al2O3 for electrolytic capacitors

2014

Hydrous films were grown on high purity and cubicity Al foils for electrolytic capacitors in deionized water, ethylene glycol - deionized water and in glycerol - deionized water for different immersion times. According to the X-ray diffraction patterns the hydration treatment allowed to grow a pseudo boehmite layer on Al surface whose morphology is appreciably affected by the bath composition. Capacitance measurements and photoelectrochemical findings suggest that a more compact barrier layer forms during the immersion in alcohol containing solutions. The hydration in water allowed to save energy and to prepare more blocking oxide films. The beneficial effect of hydration in hot water on th…

Modelling, simulation and characterization of a supercapacitor

2020

In the last decade, the issue of air pollution or the reduction of CO2 emissions has become of extreme interest both for civil society and then for the industrial and scientific research world. For this reason, the scientific research on automotive is called to answer with increasingly innovative solutions. One of the principal subjects are the storage and the utilization of the electric energy for electrical and hybrid vehicles. Nowadays, supercapacitors are getting more and more attention because of their characteristics that allow them to be a bridge between electrolytic capacitors and batteries in several application such as bust-mode energy delivery, regenerative breaks and so on. The …

Impedance of space-charge-limited currents in organic light-emitting diodes with double injection and strong recombination

2006

The impedance model for a one-carrier space-charge-limited (SCL) current has been applied to explain some experimental features of double carrier organic light-emitting diodes. We report the analytical model of impedance of bipolar drift transport in SCL regime in the limit of infinite recombination. In this limit the ac impedance function is identical to that of a single carrier device, with a transit time modified by the sum of mobilities for electrons and holes, μn+μp. The static capacitance C(ω→0) is a factor of ¾ lower than the geometric capacitance, as observed for single carrier devices, but it is shifted to higher frequencies. It follows that impedance measurements in the dual-carri…

Automated highway systems and hard-shoulders running: A case study

2016

The purpose of this research was to evaluate the increase of capacity of existing motorway resulting from the implementation of relatively new traffic control strategies, as the automated highway systems (AHS) and the hard-shoulder running (HSR). Was examined the Italian motorway A22, belonging to Trans-European Road Network, corridor Helsinki - La Valletta. Many traffic surveys were done (year 2014) in several road sections. For each of them have been carried out the flow diagrams, the traffic flow parameters (capacity C, free flow speed vf,jam density kjam) and the relationship between flow rate of lane (right lane Qright and passing lane Qpass) and total flow rate Qt. The current carriag…

Energetic Sustainability Using Renewable Energies in the Mediterranean Sea

2016

The paper is focused on the analysis of the electrical energy sector in the Maltese islands, focusing on the employment of Renewable Energies in order to increase its energy independence. The main renewable source here proposed is wave energy: thanks to its strategic position, Malta will be able to generate electrical energy through the use of an innovative type of Wave Energy Converter (WEC) based on the prototype of linear generator designed and developed by the University of Palermo. This new technology will be able to cut down the electrical energy production from traditional power plants and, consequently, the greenhouse gas emissions (GHG). Wave energy source and off-shore photovoltai…

PCM thermal storage design in buildings: Experimental studies and applications to solaria in cold climates

2017

Abstract As energy availability and demand often do not match, thermal energy storage plays a crucial role to take advantage of solar radiation in buildings: in particular, latent heat storage via phase-change material is particularly attractive due to its ability to provide high energy storage density. This paper analyzes the performance of a building-integrated thermal storage system to increase the energy performances of solaria in a cold climate. A wall opposing a highly glazed facade (south oriented) is used as thermal storage with phase change materials embedded in the wall. The study is based on both experimental and simulation studies. The concept considered is particularly suited t…