Search results for "Direct"
showing 10 items of 2669 documents
Trade-off Performance of Optical Nanoantennas for Solar Energy Harvesting Applications
2019
In this paper, the optimum behaviour of optical nanoantennas, in terms of impedance, directivity, available power, and field enhancement, at a resonance frequency of about 350 THz, will be shown. Optimum configurations are obtained by varying nanoantennas geometry in order to maximize the available power, enhancing the electric field in gap proximity and so the absorptivity. Moreover, the simulation results for aluminum nanoantennas on a three-layers substrate, will be reported, and a trade-off performance comparison among different antennas will be discussed. This study can guide both the engineering and the fabrication of plasmonic nanoantennas.
Clustering and interorganizational dynamics in foreign market entry strategies. Evidence from Chinese MNEs
2015
Owing to the globalization and economic integration worldwide, countries and markets become more independent, and companies and people are all inevitably involved in the global marketplace. This situation increases the importance of international management (IM) in nowadays business practice and the relevance of study on it. The essential focus of IM research is on multinational enterprise (MNE) strategies, among which the foreign market entry strategies have been underlined and received a great deal of attention. The carried out research aims to increase the knowledge on MNE’s behaviors and strategic decisions in foreign direct investment (FDI). We first gave a retrospective look at foreig…
Educación XX1 : revista de la Facultad de Educación
2019
Aprender a aprender es una de las competencias claves fijadas por la Comisión Europea (CE, 2005 y 2006) para los sistemas educativos de los países miembros. Las últimas investigaciones ponen de relieve la importancia de que los estudiantes universitarios aprendan a aprender, por lo que este estudio se ubica en la universidad. El objetivo es concretar un modelo teórico sobre dicha competencia que permita su operacionalización en los grados universitarios. Para ello se ha realizado una revisión de la literatura sobre el tema. Después de estudiar su fundamentación científica y la normativa reguladora, se analizaron múltiples modelos -especialmente provenientes de la literatura europea- y se pr…
Service-learning in the Spanish university system : a study based on deans’ perception
2019
Título, resumen y palabras clave en español e inglés Resumen basado en el de la publicación Disponible la versión en inglés La tercera misión de la universidad implica devolver a la sociedad parte de lo que de ella recibe. Este modo de entender la relación entre sociedad y universidad supone la implementación de nuevas metodologías de enseñanza-aprendizaje, en las cuales el profesorado deja de ser un mero transmisor de conocimiento y los estudiantes adquieren un papel activo y crítico en respuesta a las necesidades sociales. El aprendizaje-servicio es una estrategia metodológica que combina la formación teórica en un ámbito de conocimiento con su aplicación a través de la prestación de un s…
Raising Awareness of Students’ Self-Directed Learning Readiness (SDLR)
2021
This paper describes the mapping of self-directed learning readiness (SDLR) for adult students applying for a master’s degree program delivered entirely as distanced learning. Since SDLR is strongly linked to both adult learning and online education, developing of self-directed learning (SDL) skills should be taken into consideration in our degree program. Making future students aware of SDLR is the first stage in introducing self-directed learning methods and practices in learning environments. The easiest way to do this is to have students answer an SDLR self-assessment questionnaire and give them feedback regarding their SDLR level. This paper presents how this is realized and provides t…
The fumarolic CO2 output from Pico do Fogo volcano (Cape Verde)
2020
The Pico do Fogo volcano, in the Cape Verde Archipelago off the western coasts of Africa, has been the most active volcano in the Macaronesia region in the Central Atlantic, with at least 27 eruptions during the last 500 years. Between eruptions fumarolic activity has been persisting in its summit crater, but limited information exists for the chemistry and output of these gas emissions. Here, we use the results acquired during a field survey in February 2019 to quantify the quiescent summit fumaroles' volatile output for the first time. By combining measurements of the fumarole compositions (using both a portable Multi-GAS and direct sampling of the hottest fumarole) and of the SO2 flux (u…
Desinformando, que es gerundio. Trabajando con fake news en la clase de ELE
2022
El propósito de esta propuesta didáctica consiste en trabajar las cuatro destrezas de los estudiantes a través de fake news, haciendo especial hincapié en la expresión y comprensión escrita, al tiempo que se desarrolla la competencia informacional de los discentes. En cuanto al trabajo de la expresión escrita, este se centrará principalmente en la composición de noticias falsas, tanto de forma individual como colaborativa, empleando para ello procesadores de texto en línea y la autocorrección mediante retroalimentación indirecta.
Determinación multielemental de metales traza en agua de mar
2015
Los metales traza presentes en las aguas marinas, procedentes de actividades antropogénicas, constituyen un serio problema ambiental y de salud debido a su toxicidad y a las repercusiones que ocasionan sobre los seres vivos, al introducirse en la cadena trófica. La determinación de metales traza en agua de mar supone un problema analítico complejo derivado de la baja concentración a la que se encuentran los analitos y al elevado contenido salino que dificulta la cuantificación. Por ello, surge la necesidad de contar con técnicas de detección sensibles y con metodologías de separación / preconcentración de muestra que permitan aislar los analitos de la matriz y aumentar su concentración para…
A parallel radix-4 block cyclic reduction algorithm
2014
A conventional block cyclic reduction algorithm operates by halving the size of the linear system at each reduction step, that is, the algorithm is a radix-2 method. An algorithm analogous to the block cyclic reduction known as the radix-q partial solution variant of the cyclic reduction (PSCR) method allows the use of higher radix numbers and is thus more suitable for parallel architectures as it requires fever reduction steps. This paper presents an alternative and more intuitive way of deriving a radix-4 block cyclic reduction method for systems with a coefficient matrix of the form tridiag{ − I,D, − I}. This is performed by modifying an existing radix-2 block cyclic reduction method. Th…
Comparison of the accumulation of fibre breaks occurring in a unidirectional carbon/epoxy composite identified in a multi-scale micro-mechanical mode…
2010
National audience; A model to predict fibre break accumulation that takes into account all physical phenomena at the origin of the fibre break (i.e. the random nature, stress transfer due to breaks, fibre debonding and viscosity of the matrix) shows clearly that the failure of a unidirectional composite structure results in the formation of random fibre breaks which at higher loads coalesce into clusters of broken fibres. The object of the study is to experimentally confirm this scenario. Many techniques exist to detect the failure of carbon fibre composites, however none of them offer a resolution that allows this goal to be achieved in a non-destructive manner and in three dimensions. Hig…