Search results for "TG"
showing 10 items of 2275 documents
Multicriteria evaluation of carbon-neutral heat-only production technologies for district heating
2018
Climate change mitigation requires reducing dependence on fossil fuels and transition to low carbon energy production technologies. Nearly half of the global final energy consumption is thermal energy produced from technologies with high carbon dioxide emission. As such, it is imperative to employ carbon-neutral heat production to achieve a sustainable energy system. This paper presents a real-life case of applying multicriteria decision analysis for evaluating carbon-neutral heat-only production technologies in a major district heating system in Finland. A group of 10 experts from the energy company contributed in defining the alternative technologies and multiple economic, technological, …
A Mixed Approach for Determination of Initial Cable Forces in Cable-Stayed Bridges and the Parameters Variability
2015
The determination of initial cable forces in cable-stayed bridges is an important first step in design and analysis of the structure under external loads. Adjustments of stay forces are often required during construction in order to assure the requested behaviour of the bridge in terms of final geometrical configuration and internal force distribution. An accurate assessment of the stay tensioning system allows designers to obtain a good result at the end of construction, by considering the parameters involved as deterministic quantities, assuring the observance of the execution tolerances during works. Actual loads and their variations need instead a stochastic approach which can give usef…
Evaluation of the Safety Performance of Turbo Roundabouts by Means of a Potential Accident Rate Mode
2015
Turbo roundabouts are a particular road intersection layout, designed to increase the safety of double-lane roundabouts, while maintaining their excellent capacity. The main feature of this new concept of roundabout is the impossibility to move from one lane to another, provided by physical barriers marking the lanes. The paper shows an application to turbo roundabouts of a potential accident rate model, aiming to evaluate their safety improvement. Themodel is based on the concept of potential conflict: each vehicle involved in a general intersection performs a series of maneuvers which potentially imply a crash, according to the actual traffic. The number of accidents related to each criti…
Características del Aprendizaje Integrado de Contenidos de Educación Física y Lengua Extranjera
2016
El aprendizaje de inglés se ha convertido en los últimos tiempos en uno de los principales objetivos del sistema educativo, y es clara la propuesta de que la adquisición de esta lengua se lleve a cabo a través de contenidos. La Educación Física (EF), gracias a sus características, parece una de las áreas en las que se apuesta más fuerte por la utilización del inglés como lengua vehicular. Sin embargo, para desarrollar una práctica óptima utilizando esta lengua como vehículo comunicativo, conviene atender tanto a factores propios del aprendizaje de lenguas, como a las peculiaridades de la Educación Física. El presente artículo analiza esas particularidades ligándolas con los aspectos clave d…
Sesión apologética dedicada á D. Rafael Cisternas y Fontseré : discurso leído en la apertura de curso de 1894 del Instituto Médico Valenciano
1894
Influencia de las faltas de asistencia en el proceso de enseñanza y aprendizaje. Un estudio de casos en atención a la diversidad
2018
Se analizó la influencia de las faltas de asistencia en el proceso de enseñanza y aprendizaje en dos alumnos escolarizados en un aula de un Centro de Educación Especial (CEE) de Valencia. Metodológicamente, en una primera fase, a partir de la observación cuantitativa y el cálculo en porcentaje, se obtuvo la frecuencia trimestral de faltas en cada aula, tomando en consideración el alumnado del aula con mayor registro. En una segunda fase, en relación a los dos alumnos de mayor frecuencia de faltas, se han recogido una serie de datos mediante hojas de registro y entrevistas que han permitido analizar cualitativamente estos casos. Los resultados apuntan absentismo de alta y media intensidad y …
El modelo de Ausubel en la didáctica de la física: una aproximación experimental al proceso E/A de contenidos que presentan constructos poco elaborad…
1993
This paper shows the results of a research on physics education about «Magnetism» in secondary school. We investigate a constructivist approach to instructional design based upon Ausubel's model in the treatment of subjects on which pupils have poor conceptual representations and alternative frameworks. The first results with respect to inmediate and lasting learning, are shown.
Magnetic Resonance Imaging in Gastroenterology: Time to Say Good-bye to All That Endoscopy?
2000
Magnetic resonance imaging (MRI) has been described as the most important development in medical diagnosis since the discovery of the roentgen ray more than 100 years ago. The effectiveness of MRI has been extended to make it applicable in a wide variety of gastrointestinal disorders. The attention of gastroenterologists is currently focusing on pancreaticobiliary and bowel diseases. Magnetic resonance cholangiopancreatography (MRCP) has become a competitive alternative to diagnostic endoscopic retrograde cholangiopancreatography in a variety of hepatobiliary and pancreatic diseases. Magnetic resonance enteroscopy has the potential to become the preferable method for evaluating the entire s…
Reducing the Cost of Being the Boss: Authentic Leadership Suppresses the Effect of Role Stereotype Conflict on Antisocial Behaviors in Leaders and En…
2021
What drives entrepreneurs to engage in antisocial economic behaviors? Without dismissing entrepreneurs’ agency in their decision-making processes, our study aims to answer this question by proposing that antisocial economic behaviors are a dysfunctional coping mechanism to reduce the psychological tension that entrepreneurs face in their day-to-day activities. Further, given the overlap between the male gender role stereotype and both leader and entrepreneur role stereotypes, this psychological tension should be stronger in female entrepreneurs (or any person who identifies with the female gender role). We argue that besides the well-established female gender role – leader role incongruence…
Environmental and biological factors influencing trace elemental and microstructural properties of Arctica islandica shells
2018
Long-term and high-resolution environmental proxy data are crucial to contextualize current climate change. The extremely long-lived bivalve, Arctica islandica, , is one of the most widely used paleoclimate archives of the northern Atlantic because of its fine temporal resolution. However, the interpretation of environmental histories from microstructures and elemental impurities of A. islandica, shells is still a challenge. Vital effects (metabolic rate, ontogenetic age, and growth rate) can modify the way in which physiochemical changes of the ambient environment are recorded by the shells. To quantify the degree to which microstructural properties and element incorporation into A. island…