Geometric Objects: A Quality Index to Electromagnetic Energy Transfer Performance in Sustainable Smart Buildings

Sustainable smart buildings play an essential role in terms of more efficient energy. However, these buildings as electric loads are affected by an important distortion in the current and voltage waveforms caused by the increasing proliferation of nonlinear electronic devices. Overall, buildings all around the world consume a significant amount of energy, which is about one-third of the total primary energy resources. Optimization of the power transfer process of such amount of energy is a crucial issue that needs specific tools to integrate energy-efficient behaviour throughout the grid. When nonlinear loads are present, new capable ways of thinking are needed to consider the effects of harmonics and related power components. In this manner, technology innovations are necessary to update the power factor concept to a generalized total or a true one, where different power components involved in it calculation, properly reflect each harmonic interaction. This work addresses an innovative theory that applies the Poynting Vector philosophy via Geometric Algebra to the electromagnetic energy transfer process providing a physical foundation. In this framework, it is possible to analyse and detect the nature of disturbing loads in the exponential growth of new globalized buildings and architectures in our era. This new insight is based on the concept of geometric objects with different dimension: vector, bivector, trivector, multivector. Within this paper, these objects are correlated with the electromagnetic quantities responsible for the energy flow supplied to the most common loads in sustainable smart buildings. Besides, it must be considered that these phenomena are characterized by a quality index multivector appropriate even for detecting harmonic sources. A numerical example is used to illustrate the clear capabilities of the suggested index when it applies to industrial loads for optimization of energy control systems and enhance comfort management in smart sustainable buildings

El documento audiovisual en las emisoras de televisión: selección, conservación y tratamiento

Analysis of the audiovisual material’s peculiarities and its management in television information units. According with the aims of the television information centers: conservation and treatment, the main approaches for the selection of audiovisual messages are considered and some thoughts about their content analysis with a view to their retrieval are carried out

Una nueva propuesta metodológica en torno al ritmo visual : aplicación del método de análisis instrumental al ritmo visual de una telenovela y un telefilme norteamericano

Este artículo pretende desarrollar un nuevo modelo teórico en torno al ritmo visual que propone la cantidad de superficie en movimiento sobre la pantalla como estímulo perceptivo fundamental. El nuevo modelo resta importancia al efecto rítmico de la duración de los planos. La propuesta está contrastada con el análisis minucioso de seis capítulos de teleseries de ficción. Se estudiaron tres capítulos de la telenovela venezolana La loba herida y tres del telefilme americano Knots Landing (California). El estudio se ha realizado midiendo la duración de todos los planos de los seis capítulos y calculando la cantidad de movimiento en pantalla de un fragmento de dos minutos de cada uno de los seis capítulos. (Autor)The aim of this article is to develop a new theoretical model concerning visual pace which proposes that the amount of screen in motion is the main perceptual stimulus. The new model attaches less importance ro the rhythmic effect of the duration of frarnes. This proposal is closely examined by means of a detailed analysis of six episodes of television drama series.The study included three episodes of the Venezuelan TV serial «La loba herida» and three episodes of the American series «Knors Landingn (Calzjornia). The duration of all the frames of each of the six episodes was measured and the amount of on-screen movement in a two-rninute fragment from each of the episodes was calculated. (Author

La investigación aplicada: una nueva perspectiva para los estudios de la recepción

El Laboratorio de Análisis Instrumental de la Comunicación (LAICOM) del Departamento de Comunicación Audiovisual y de Publicidad de la Universidad Autónoma de Barcelona trabaja desde el año 1989 en una línea de investigación experimental centrada en la resolución de problemas concretos de comunicación aplicada. Desde el punto de vista epistemológico, el método de análisis instrumental de la comunicación establece una concepción de la comunicología que la diferencia muy claramente de otras disciplinas con objetos de estudio aparentemente afines como la lingüística, la psicología o la sociología. En suma, la metodología de análisis instrumental da respuesta a las investigaciones que persiguen conocer los mecanismos de recepción de los procesos comunicativos, o que intentan saber cómo se puede mejorar su rendimiento (aumento de la persuasión, mejora de la comprensión, optimización de la memorización, etc.). El resultado de esta perspectiva metodológica abre un ámbito profesional muy claro orientando a solucionar problemas comunicológicos concretos en campos tan diversos como: el derecho, la investigación policial (pruebas periciales vinculadas con la comunicación periodística, audiovisual, telefónica, etc.), la medicina (comunicación facultativos - pacientes), la política, el comercio (rendimiento comunicativo y persuasivo de los discursos), la informática, las telecomunicaciones (rendimiento comunicativo de las presentaciones en las interfaces digitales), etc.Since 1989, the Instrumental Communications Analysis Laboratory (LAICOM), which forms part of the Audiovisual and Advertising Communications Dept. of the Universidad Autónoma de Barcelona has been working on a line of experimental research focused on the solving of specific problems with respect to applied communications. In this way, the communications proposed by us would develop this methodological model: the Instrumental Communications Analysis Method, both from the strictly theoretical and methodological standpoint, and from the standpoint of the practical application of this method, developed in a series of specific cases. From the epistemological standpoint, the Instrumental Communications Analysis establishes an idea of studying communications that clearly differentiates it from other disciplines with subjects of study that are apparently similar, such as Linguistics, Psychology or Sociology. There is no doubt that the result of this methodological approach will open up a professional field that is clearly aimed at solving specific problems of communication in fields as varied as, for example, law, police investigation (tests performed by experts linked to news media, audiovisual, telephone, communications, etc.), medicine (communications between doctors and patients), politics, trade (the communicative and persuasive performance of speeches), data processing, telecommunications (the communicative performance of presentations in digital interfaces), etc

Reseñas

Obra ressenyada: Juan José IGARTUA PEROSANZ, Métodos cuantitativos de investigación en comunicación. Barcelona: Bosch, 200

Audiovisual and Multimedia Content in the Curriculum for Librarianship Studies at the University of León in Spain

p. 234-240Within the framework of its programmes in Librarianship and Information Studies, the University of León provides a course whose syllabus is aimed at giving an awareness of audiovisual and multimedia documents. The second-year course in ‘Analysis of Document Content’ deals with the treatment of documentary messages with a view to retrieval.S

Library and Information science graduates from Spain-professional training and workforce entry

p. 355-369Professional training and workforce entry profiles of Library and Information Science graduates from Spain are analysed. For this purpose 105 alumni who had graduated from the Library and Information Science (LIS) Diploma course at the University of León between the years 1993 and 2007 were surveyed and the re-sults analysed in order to identify further professional training undertaken, pro-fessional profiles, and professional career paths. These results were compared with those obtained from a series of interviews conducted with information profes-sionals employed in León, and with results of another survey of professionals working in other regions in Spain. The aim was to improve the LIS degree curricu-lum at the University of León.S

Continuous harmonic analysis and power quality measurements in three-phase systems

A virtual instrument, named Power Quality Meter, is presented for (a) measuring power consumption and harmonics in three-phase systems, under non-sinusoidal and imbalance conditions (b) detecting, classifying and organizes power disturbance events. Measurement of the power consumption follows the formulation proposed by the members of the IEEE Working Group on Nonsinusoidal Situations (1996). So, definitions are based on the analysis of functions in the frequency domain, separating the fundamental terms from the harmonic terms of the Fourier series. The virtual instrument has been developed too for monitoring and measuring power disturbances, which are automatically classified and organized in a database while they are being recorded. Software tools use the database structure to present summaries of power disturbances and locate an event by severity or time of occurrence. Records of actual measurements are included to demonstrate the versatility of the instrument