1,720,972 research outputs found
Huracanolitos en Baitiquirí (Guantánamo), movidos por el huracán Matthew: análisis del proceso físico. Aplicación en estudios de paleodeposiciones
No full textEl Caribe es una de las regiones del planeta más afectadas por huracanes. Por ejemplo, en 2016 el huracán Matthew provocó pérdidas económicas millonarias, extendiendo sus afectaciones hasta E.E.U.U. En Cuba, Guantánamo fue la provincia más dañada por Matthew, aunque no ocurrieron muertes a nivel nacional en virtud de las medidas preventivas tomadas. También es conocido que la capacidad de la población para enfrentar estos tipos de situaciones depende de la percepción del riesgo por huracanes. Guantánamo es una zona con baja percepción, asociado en gran medida a la baja frecuencia de recibir impactos de eventos de oleaje extremo, considerando la base de datos existente para tsunamis (UNESCO 2014) y huracanes (SOMETCUBA, 2004). La identificación de huracanolitos transportados por el poderoso huracán Matthew, ha sido básico para: (1) analizar los huracanolitos movidos por el huracán Matthew a través de las ecuaciones de transporte de sedimentos, (2) examinar la eficacia del uso de las ecuaciones de transporte de sedimentos, (3) identificar la génesis de los boulders antiguos a través de las ecuaciones de transporte de sedimentos, utilizando como análogo lo bloques movidos por el huracán Matthew. Aunque es una primera aproximación, los resultados obtenidos pueden ser aplicados en las mejoras de los modelos de estos procesos, generados durante las incidencias de estos meteoros en zonas costeras. Fueron utilizadas las salidas del Modelo Numérico Océano-Atmósfera del Instituto de Meteorología, con olas de 6-9 metros en la costa sur de esta provincia; los datos de estaciones de Guantánamo; la evaluación de los huracanolitos ubicados en el área y las ecuaciones establecidas para su transporte (Nott, 2003, Engel and May, 2012).The Caribbean is one of the most regions of the planet affected by hurricanes. For example, in 2016, Hurricane Matthew caused millions of dollars in economic losses, extending its effects to E.E.U.U. In Cuba, Guantanamo was the province most damaged by Matthew, although there were no deaths at the national level due to the preventive measures taken. It is also known that the capacity of the population to face these types of situations depends on the perception of hurricane risk. Guantanamo is an area with low perception, associated to a large extent with the low frequency of receiving impacts from extreme wave events, considering the existing data base for tsunamis (UNESCO 2014) and hurricanes (SOMETCUBA, 2004). The identification of huracanoliths transported by the powerful Hurricane Matthew, has been basic to: (1) analyze the hurricanes moved by Hurricane Matthew through the sediment transport equations, (2) examine the efficiency of the use of transport equations of sediments, (3) identify the genesis of the ancient boulders through the sediment transport equations, using as analog the blocks moved by Hurricane Matthew. Although it is a first approximation, the obtained results can be applied in the improvements of the models of these processes, generated during the incidences of these meteors in coastal zones. The outputs of the Numeric Ocean-Atmosphere Model of the Institute of Meteorology were used, with waves of 6-9 meters on the south coast of this province; the data from Guantanamo stations; the evaluation of the hurricanes located in the area and the equations established for their transport (Nott, 2003, Engel and May, 2012).Facultad de Matemática, Física y Computación. Departamento de Físicanon-publishe
Sistema informático para la gestión de la información meteorológica en Cayo Coco
No full textEl grupo de Hidrometeorología del Centro de Investigaciones de Ecosistemas Costeros gestiona un gran volumen de datos, relacionados con elementos climatológicos. Los datos son procesados para utilizar con diferentes fines, fundamentalmente para aplicar en los Servicios Científico-Técnicos ofrecidos por la institución en el área de la cayería, así como en el desarrollo de proyectos científicos. En el presente trabajo se desarrolla una aplicación web siguiendo estándares de código abierto que permite gestionar dicha información y apoyar la prestación de los servicios mencionados.
Se realiza un estudio del estado del arte sobre los principales sistemas de gestión de información climatológica existentes a nivel nacional e internacional, sus ventajas y desventajas, así como las funcionalidades comunes que presentan. Se realiza el diseño e implementación de una base de datos relacional en PostgreSQL para la gestión de la información. Se describe el análisis y diseño de los principales componentes de la aplicación y su arquitectura general. Para el desarrollo del sistema se utiliza el framework Symfony2 siguiendo una arquitectura Modelo Vista Controlador y para mostrar las vistas se utiliza Bootstrap3. Finalmente se valida el funcionamiento de la aplicación mediante distintos métodos de prueba.The Hydrometeorology Group belonging to the Center of Coast Ecosystems Research manages a great data volume related with climate elements. The data are processed to be used with different purposes, mainly for applying to the Scientific and Technical services offered by the institution in the areas of the Cays and to the development of scientific projects. In the present paper there is a web application by following Open Code standards which permeates the management of that information to support the offered services.
A study of the special bibliography about the main systems of climate information at the international level is carried out as well as their advantages and disadvantages. Also in this process the common functions are taken into account. A relational database is designed with its correspondent implementation is also made in PostgreSQL, for the information management in which the main components and the general architecture is described. For the development of the system it is used the framework Symphony2 by following architecture Model View Controller and for showing views there is used the Bootstrap3. Finally, the functioning of the application is evaluated through different test methods.Facultad de Matemática, Física y Computación. Departamento de Ciencias de la Computaciónnon-publishe
Implementación de un modelo simple para la predicción de la generación eólica: MOSIMPRE versión 1.0
No full textEl presente trabajo aborda el tema de la predicción de la velocidad del viento en parques eólicos país, lo cual está directamente vinculado a estimación potencia generada eólicos del país, lo cual está directamente vinculado a la estimación de la potencia generada ese parque. A partir una revisión métodos pronóstico se selecciona e implementa de ese parque. A partir de una revisión de métodos de pronóstico se selecciona e implementa método modelado y series tiempo basado sinergia mapas el método de modelado y predicción de series de tiempo basado en sinergia de mapas cognitivos difusos alto-orden agrupamiento difuso c-medias combinando patrones cognitivos difusos de alto-orden y agrupamiento difuso c-medias combinando patrones de ingeniería software. La herramienta computacional obtenida (MOSIMPRE) permite la ingeniería de software. La herramienta computacional obtenida (MOSIMPRE) permite gestionar información histórica eólicos, pronosticar gestionar la información histórica de parques eólicos, pronosticar la velocidad del viento en un periodo corto por tanto generar parque graficar información. un periodo corto y por tanto la potencia a generar por el parque y graficar información. Además, implementación garantiza extensibilidad sistema con incorporación Además, la implementación garantiza la extensibilidad el sistema con la incorporación de nuevos través Plug-Ins. nuevos métodos de pronóstico a través de Plug-Ins.The present work deals with the topic of the prediction of the velocity of the winds in Eolic parks around the country, which is directly linked with the estimation of the generated power in the park. The time series modeling and prediction approach based in synergy of high-order fuzzy cognitive map and fuzzy C-means clustering went chosen and implemented starting from a revision of predictions methods, mixing different patrons of software engineering. The resulting computational tool (MOSIMPRE) allows getting the historic information of Eolic parks, illustrating information, forecasting the velocity of winds in a short period, and therefore, the power to generate. In addition, the implementation guarantees that the system can be extensible with the incorporation of new prediction methods across Plug-ins.Facultad de Matemática, Física y Computación. Departamento de Ciencias de la Computaciónnon-publishe
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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