Secondary-Side Control in Dynamic Wireless Power Transfer Systems for Double-Sided Inductor-Capacitor-Capacitor and Series-Series Compensation Topologies

Electric Vehicles (EVs) are fast becoming a great alternative as future mode of transportation, due to their promise of low emissions. Nevertheless, EVs suffer from battery related problems such as large size, heavy weight, high price, long charging times and a short driving range. Dynamic wireless power transfer systems (DWPTSs) address the battery issue by providing power to the vehicle while in motion, and eliminate the need of plugging. However, unavoidable load and coupling coefficient variations cause degradation of power delivery and efficiency. Hence, a controller must be added to the dynamic charger for power conditioning and efficiency enhancement. This project is focused on the control stage of the DWPTS adopting a post-regulation scheme as control strategy. It proposes the integration of a secondary-side-only control under double-sided inductor-capacitor-capacitor (LCC) and series-series compensation topologies. A synchronous buck converter is used to step down the voltage to the maximum power transfer efficiency (MPTE) conditions and control the direct current (DC) link by adjusting the duty cycle of the control pulse. Averaged alternating current (AC) modelling is applied for designing the controller to smooth and speed the response of both systems. An estimation equation for coupling coefficient and a controller for the double-sided LCC compensation topology are introduced. A comparison study between these two topologies comprised of their characteristics and response to the controller is carried out

Study of the morphological diversity of the honeybees (apis mellifera l.) from the south of Europa and South America

We have studied 9 corporal characteristics in 118 samples of honey bees coming from the Iberian Peninsula, Madeira, Canary Island and Brazil. The results show that the bees originating of Brazil form a morphological group. In another group they are included those coming from the islands of Tenerife, Gran Canaria, Gomera and Hierro, all belong to the Canary Island. The third group is formed by the bees of the Iberian Peninsula and the islands of La Palma and Madeira.Hemos estudiado 9 características corporales en 118 muestras de abejas obreras procedentes de la Península Ibérica, Madeira, Archipiélago Canario y Brasil. Los resultados muestran que las abejas oriundas de Brasil forman un grupo morfológico propio. En otro grupo se incluyen las procedentes de las islas de Tenerife, Gran Canaria, Gomera y Hierro, todas pertenecen al Archipiélago Canario. El tercer grupo está formado por las abejas de la Península Ibérica y las islas de La Palma y Madeira

A Framework for Topological Music Analysis (TMA)

In the present article we describe and discuss a framework for applying different topological data analysis (TDA) techniques to a music fragment given as a score in traditional Western notation. We first consider different sets of points in Euclidean spaces of different dimensions that correspond to musical events in the score, and obtain their persistent homology features. Then we introduce two families of simplicial complexes that can be associated to chord sequences, and calculate their main homological descriptors. These complexes lead us to the definition of dynamical systems modeling harmonic progressions. Finally, we show the results of applying the described methods to the analysis and stylistic comparison of fragments from three Brandenburg Concertos by J.S. Bach and two Graffiti by Mexican composer Armando Luna

Estudio biométrico de la abeja melífera (Apis mellifera, Linneo 1758) (Hymenoptera, Apidae) de la isla de La Palma del Archipiélago Canario. II. Ángulos y longitudes de las alas.

The honey bees (A. mellifera L.) from the island of La Palma constitute a morphological group within which differences related to the geographical location of the apiaries are difficult to distinguish, probably due to the buying and selling of hives among beekeepers, and also to the migratory style of bee-keeping practised on the island. We have also studied the possible relationship of these bees with A. m. intermissa, which is distributed throughout the north of Africa, and with A. m. iberica in the Iberian Peninsula. Our results indicate that these bees are probably the result of a cross between these two races followed by selection of the best genotypes adapted to the environmental conditions.Las abejas meliferas (A. mellifera L.) oriundas de la isla de La Palma constituyen un grupo morfológico, en el que no podemos apreciar diferencias relacionadas con la localización geográfica de los colmenares; probablemente esto sea debido a las prácticas de compra-venta de colmenas entre los apicultores, y a la transhumancia practicada dentro de la isla. También hemos estudiado la posible relación de parentesco de estas abejas con la raza que se distribuye por el norte de África (A. m. intermissa), o con la que se localiza en la Península Ibérica (A. m. iberica). Los resultados obtenidos nos indican que probablemente estos animales sean el resultado de un proceso cruce entre las dos razas, y posterior selección de los genotipos mejor adaptados a unas determinadas condiciones ambientales

Rhetorical Pattern Finding

In this paper, we research rhetorical patterns from a musicological and computational standpoint. First, a theoretical examination of what constitutes a rhetorical pattern is conducted. Out of that examination, which includes primary sources and the study of the main composers, a formal definition of rhetorical patterns is proposed. Among the rhetorical figures, a set of imitative rhetorical figures is selected for our study, namely, epizeuxis, palilogy, synonymia, and polyptoton. Next, we design a computational model of the selected rhetorical patterns to automatically find those patterns in a corpus consisting of masses by Renaissance composer Tomás Luis de Victoria. In order to have a ground truth with which to test out our model, a group of experts manually annotated the rhetorical patterns. To deal with the problem of reaching a consensus on the annotations, a four-round Delphi method was followed by the annotators. The rhetorical patterns found by the annotators and by the algorithm are compared and their differences discussed. The algorithm reports almost all the patterns annotated by the experts and some additional patterns. The algorithm reports almost all the patterns annotated by the experts (recall: 98.11%) and some additional patterns (precision: 71.73%). These patterns correspond to rhetorical patterns within other rhetorical patterns, which were overlooked by the annotators on the basis of their contextual knowledge. These results pose issues as to how to integrate that contextual knowledge into the computational model

Promoting Civic Knowledge and Political Efficacy Among Low-Income Youth Through Applied Political Participation

Studies indicate growing disparities in youth civic knowledge and political efficacy based on socioeconomic status, parental educational attainment, and race. Most studies of youth political participation focus on the effect political efficacy and civic knowledge have on political participation. Few report on the effect political participation has on political efficacy and civic knowledge. This article describes an intervention that coupled civic literacy workshops with applied political participation to increase the civic knowledge and political efficacy of low-income, ethnically diverse high school students. Over three years, 47 high school students enrolled in Upward Bound participated in a six-hour civic literacy workshop. Upon conclusion of the workshop, students spent a day meeting with legislators and attending legislative hearings. Results indicate increases in political efficacy and significant increases in civic knowledge among the youth after both the workshop and the visits with elected officials

Muon Detection of TeV Gamma Rays from Gamma Ray Bursts

Because of the limited size of the satellite-borne instruments, it has not been possible to observe the flux of gamma ray bursts (GRB) beyond GeV energy. We here show that it is possible to detect the GRB radiation of TeV energy and above, by detecting the muon secondaries produced when the gamma rays shower in the Earth's atmosphere. Observation is made possible by the recent commissioning of underground detectors (AMANDA, the Lake Baikal detector and MILAGRO) which combine a low muon threshold of a few hundred GeV or less, with a large effective area of 10^3 m^2 or more. Observations will not only provide new insights in the origin and characteristics of GRB, they also provide quantitative information on the diffuse infrared background.Comment: Revtex, 12 pages, 3 postscript figures, uses epsfig.st

LabVIEW interface with Tango control system for a multi-technique X-ray spectrometry IAEA beamline end-station at Elettra Sincrotrone Trieste

A new synchrotron beamline end-station for multipurpose X-ray spectrometry applications has been recently commissioned and it is currently accessible by end-users at the XRF beamline of Elettra Sincrotrone Trieste. The end-station consists of an ultra-high vacuum chamber that includes as main instrument a seven-axis motorized manipulator for sample and detectors positioning, different kinds of X-ray detectors and optical cameras. The beamline end-station allows performing measurements in different X-ray spectrometry techniques such as Microscopic X-Ray Fluorescence analysis (µXRF), Total Reflection X-Ray Fluorescence analysis (TXRF), Grazing Incidence/Exit X-Ray Fluorescence analysis (GI-XRF/GE-XRF), X-Ray Reflectometry (XRR), and X-Ray Absorption Spectroscopy (XAS). A LabVIEW Graphical User Interface (GUI) bound with Tango control system consisted of many custom made software modules is utilized as a user-friendly tool for control of the entire end-station hardware components. The present work describes this advanced Tango and LabVIEW software platform that utilizes in an optimal synergistic manner the merits and functionality of these well-established programming and equipment control tools

Estrategia comunicativa dentro del proceso de enseñanza y aprendizaje.

Educar es una actividad sustantiva para la sociedad y el desarrollo de naciones, por ello la importancia e interés que demuestran los países en la integración de propuestas educativas, que les permitan posicionarlos como potencias mundiales a través de diversos factores que buscan mejorar la calidad de vida de sus ciudadanos. En las últimas décadas los Centros de Investigación mediante el trabajo colegiado de investigadores y cuerpos académicos han operativizado diversas innovaciones educativas, sin embargo y a pesar de los esfuerzos no todas éstas nuevas alternativas han logrado el impacto que se ha esperado. Universidades e Instituciones de Educación Superior han realizado inversiones en modernizar y actualizar sus modalidades de educación, adquiriendo tecnología que les permita desarrollar Educación a Distancia considerando a ésta como la panacea angular para la solución y atención de la nueva demanda educativa. Sin embargo el contar con la tecnología adecuada no es la solución a la problemática de diversificación y flexibilización de la oferta educativa en las IES, se requiere un adecuado diseño instruccional que permita abordar coherentemente los contenidos curriculares abordados por la implementación de las TIC´s. En el marco del contexto de la estructura del modelo Dick & Carey se presenta una propuesta de diseño instruccional para los catedráticos universitarios, con la finalidad y el propósito de presentar sus elementos de una manera organizada y clara para su desarrollo, elaboración e implementación. Utilizar diferentesestrategias puede ser de utilidad para lograr una mayor conexión con los estudiantes, es responsabilidad del docente encontrar la que menor se adapte a su audiencia meta, el propósito del docente es facilitar el proceso de enseñanza y aprendizaje de los estudiantes, generando un aprendizaje significativo y de utilidad para su desarrollo integral dentro de su vida profesional