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Search Results: 1 - 10 of 528480 matches for " José Fernando García "
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Ultrasonido diagnóstico en cadera irritable
Romero García,José ángel; López Guevara,Fernando; Reyes Bauza,Fernando;
Revista Cubana de Ortopedia y Traumatolog?-a , 2002,
Abstract: 72 patients were studied by ultrasonography aimed at demonstrating its usefulness in the diagnosis of the irritable hip syndrome in children. a real time equipment with sectorial transductor of 5 mhz was used to compare both hips. effusion was found in 43 patients. the articular effusion predominated only among those patients with transient synovitis, whereas capsular thickening with alterations of the head of femur prevailed in perthes’ disease. a predominance of an anecoic effusion with small ecogenic images was observed in the case of septic arthritis. ultrasonography was considered as an efficient elective method to make differential diagnoses of the diseases grouped within the irritable hip syndrome.
Paradigma experto-novato: Análisis diferencial de la pérdida de consistencia del Tokui Waza en Judo bajo situación específica de fatiga. Expert-Novice paradigm: Differential analysis of the loss of consistency in the Tokui-Waza of Judo under a specif situation of fatigue.
García García, José Manuel,Navarro Valdivielso, Fernando,González Ravé, José María,Calvo Rico, Bibiana
RICYDE : Revista Internacional de Ciencias del Deporte , 2007,
Abstract: Resumen Este estudio pretende analizar si existe pérdida en la consistencia de la técnica especial en Judo cuando se ven comprometidas las reservas energéticas del judoka, y si existen, conocer cuáles son los elementos más significativos que pudieran condicionar la óptima ejecución del mismo. Los combates de Judo suelen terminar con una tasa de acumulación lactácida de entre 14 a 20 mmol/l en sangre. El test utilizado (COPTEST ) reproduce un combate de Judo con altos niveles de solicitación anaeróbica que asemejan los requerimientos energéticos de un combate en el contexto de la alta competición. En los últimos a os, varios estudios científicos (Sterkowicz,1999,2002), (García 1996,1999,2004), (Monteiro, 2003), (Francini, 2003) han intentado enumerar los posibles aspectos tanto condicionales como técnicos y cognitivos que diferencian a un judoka campeón de otro que no lo es. Método: Utilizando el modelo de investigación del paradigma Experto-Novato de Shulman (1986) se evaluaron 110 judokas de alto rendimiento. Todos realizaron el Coptest (García, 1995). Se consideraron “expertos” a los judokas que habían obtenido medalla en unos JJOO, cto mundial o cto continental. Eran “novatos” los judokas de alto rendimiento que no habían conseguido tal resultado. Se evaluaron las siguientes variables: a) Desequilibrio b) adecuación secuencial c) ángulo requerido para la correcta construcción de la técnica y d) elementos determinantes para que exista proyección Se tomaron datos de todas la ejecuciones del Tokui waza durante la ejecución del Coptest (total 4950 proyecciones). El análisis de los datos reveló que existen diferencias significativas en la ejecución del tokui waza realizado por un judoka “experto” al realizado por uno “novato.Abstract The aim of this study tries to analyze if loss in the consistency of the special technique in Judo exists when are seen it jeopardize the power reserves of judoka and know which are the most significant elements that they could condition the optimal execution of he himself. In recent years, various scientific studies (Sterkowicz,1999, 2002), (García 1996,1999,2004), (Monteiro, 2003), (Francini,2003) have tried to establish the possible different conditional, technical and cognitive aspects that differentiate one judo champion from another, although possessing in principle the necessary technical condition to be a champion but not being capable of climbing to the top of the podium. Method: Using the investigation model of the paradigm Expert-Novice of Shulman (1986) 110 high performance judokas were evaluated. All carried out
Semeadura direta de forrageiras de esta o fria em campo natural com aplica o de herbicidas: I. Produ o de forragem e contribui o relativa das espécies
Pérez Gomar Enrique,Reichert José Miguel,Reinert Dalvan José,García Prechac Fernando
Ciência Rural , 2004,
Abstract: Os campos naturais apresentam estacionalidade na sua produ o forrageira, a qual pode ser atenuada com a introdu o de espécies de esta o fria através de semeadura direta, aumentando a produ o forrageira no inverno. Durante quatro anos, conduziu-se um experimento de semeadura direta de forragem de inverno, sobre campo nativo, em um Argissolo Vermelho-Amarelo, de textura superficial arenosa do norte do Uruguai. Em delineamento de blocos ao acaso com parcelas sub-subdivididas, foram testadas doses de herbicidas (glifosate 1L ha-1, glifosate 4L ha-1, paraquat 3L ha-1 e testemunha), como tratamento principal, aplicadas no ano 1994. A repeti o ou n o das mesmas doses no ano 1995 constituiu-se na subparcela, e a aplica o ou n o das mesmas doses no ano 1996 constituiu-se na sub-subparcela. Os resultados mostraram que o maior distúrbio sobre a produ o de forrageiras e contribui o das espécies do campo nativo foi provocado com a aplica o continuada de herbicidas sistêmicos na maior dose. Quando n o foi aplicado herbicida (testemunha) havia onze espécies e com aplica o de glifosate 4L ha-1 havia seis espécies, bem como ocorreu uma substitui o de espécies perenes por anuais. O herbicida paraquat e a dose baixa de glifosate mostraram efeitos intermediários entre o observado no campo nativo semeado com triticale e azevém sem tratar com herbicida e os provocados com glifosate na dose alta. Por outro lado, os rendimentos de matéria seca das espécies forrageiras invernais semeadas foram 63% maiores na dose mais alta de glifosate do que na testemunha, devido a um maior controle da competi o que exercia o campo nativo.
Semeadura direta de forrageiras de esta o fria em campo natural submetido à aplica o de herbicidas: II. Composi o botanica
Pérez Gomar Enrique,Reichert José Miguel,Reinert Dalvan José,García Prechac Fernando
Ciência Rural , 2004,
Abstract: A semeadura direta de espécies forrageiras de esta o fria permite reduzir a marcada estacionalidade da sua produ o em campos naturais. Durante quatro anos, conduziu-se um experimento de aplica o de herbicidas sobre campo nativo, em um solo Argissolo Vermelho-Amarelo, de textura arenosa do norte do Uruguai visando introduzir forrageiras de esta o fria e estudar o impacto dos herbicidas na composi o botanica de espécies estivais. Foram testadas doses de herbicidas (glifosate 1L ha-1, glifosate 4L ha-1, paraquat 3L ha-1 e testemunha), como tratamento principal, aplicadas no ano 1994, em um delineamento blocos ao acaso. A repeti o ou n o das mesmas doses no ano 1995 constituiu a subparcela e a aplica o ou n o das mesmas doses no ano de 1996 constituiu a sub-subparcela. No levantamento de espécies da vegeta o existentes no outono de 1998, observou-se que o maior distúrbio sobre a composi o botanica do campo nativo foi provocado com a aplica o continuada da dose de 4L ha-1 de glifosate, onde foram identificadas seis espécies. No levantamento de espécies existentes no tratamento testemunha, no outono, foram identificadas onze espécies, sendo que as espécies Andropogon lateralis, Paspalum notatum, Conyza bonariensis, Eryngium horridum, Desmodium incanum, Cyperus sp. e Digitaria sp. constituiram 90% da composi o botanica. Com a aplica o de herbicida, ocorreu uma substitui o de espécies perenes por anuais.
Determinación de paraquat en orina utilizando un sistema de inyección en flujo continuo Determination of paraquat in urine samples by flow-injection analysis
José Rafael Luna,María Luisa Di Bernardo,María Ysabel García,Fernando Ovalles
Acta bioqu?-mica cl?-nica latinoamericana , 2008,
Abstract: El paraguat es un herbicida que pertenece al grupo de los biperidilos. Su determinación cuantitativa en orina es muy importante para diagnosticar la supervivencia de pacientes intoxicados. Muchos centros hospitalarios utilizan pruebas semicuantitativas para la determinación de paraquat en muestras biológicas. Sin embargo, éstas suelen carecer de precisión y exactitud. Por tanto, el desarrollo de métodos alternativos simples, exactos, precisos y accesibles podría resultar muy útil en instituciones hospitalarias. Sobre la base de estas consideraciones, se propone un método de análisis por inyección en flujo y detección espectrofotométrica para la determinación cuantitativa de paraquat en muestras de orina. La determinación se basa en la formación de un producto coloreado (600 nm) posterior a la reducción de paraquat con glucosa en un medio alcalino, mediante un sistema en línea. Bajo las condiciones óptimas de operación, la ley de Beer se cumple en el intervalo 1-50 μg mL-1 de paraquat con un coeficiente de correlación >0,999. La frecuencia de análisis fue de 12 h-1 con una desviación estándar relativa del 2,8% para una solución muestra que contiene 10 μg mL-1 de paraquat (n=3). El estudio de recuperación osciló entre 97,9 y 102,1%. El método analítico fue aplicado satisfactoriamente al análisis de muestras de dos pacientes intoxicados con paraquat. Paraguat is a herbicide beloging to the bipyridinium group.The quantitative determination of paraquat in urine of humans is very important to diagnose survival of intoxicated patients. Many hospitals use semi-quantitative tests for determining paraquat in biological samples. However, they often lack precision and accuracy. Therefore, the development of simple, precise, accurate and accessible alternative methods could be very useful in hospital institutions. Based on these considerations, a flow-injection spectrophotometric procedure is proposed for paraquat determination in urine samples. The determination is based on the formation of a coloured product (600 nm) after on-line reduction of paraquat with glucose in alkaline medium. Under optimal conditions of operation, Beer's law is obeyed in a concentration range of 1-50 μg mL-1 of paraquat with a correlation coefficient >0.999. The analytical frequency was 12 h-1 and the relative standard deviation was 2.8% for a sample solution containing 10 μg mL-1 paraquat (n=3). Recovery studies were between 97.9 and 102.1%. The analytical method was satisfactorily applied in the analyses of samples from two intoxicated patients.
Distributed Pedestrian Detection Alerts Based on Data Fusion with Accurate Localization
Fernando García,Felipe Jiménez,José Javier Anaya,José María Armingol,José Eugenio Naranjo,Arturo de la Escalera
Sensors , 2013, DOI: 10.3390/s130911687
Abstract: Among Advanced Driver Assistance Systems (ADAS) pedestrian detection is a common issue due to the vulnerability of pedestrians in the event of accidents. In the present work, a novel approach for pedestrian detection based on data fusion is presented. Data fusion helps to overcome the limitations inherent to each detection system (computer vision and laser scanner) and provides accurate and trustable tracking of any pedestrian movement. The application is complemented by an efficient communication protocol, able to alert vehicles in the surroundings by a fast and reliable communication. The combination of a powerful location, based on a GPS with inertial measurement, and accurate obstacle localization based on data fusion has allowed locating the detected pedestrians with high accuracy. Tests proved the viability of the detection system and the efficiency of the communication, even at long distances. By the use of the alert communication, dangerous situations such as occlusions or misdetections can be avoided.
La innovación educativa desde la metodología: Mejora de las actitudes y competencias científicas de los alumnos
García,José Fernando; Gracia,Enrique; Fuentes,María C.; Lila,Marisol; Pascual,Joan;
Escritos de Psicología (Internet) , 2010,
Abstract: a programme of educational innovation was implemented to improve the attitude toward research methods for psychology students. students used real data to test their own hypotheses using different statistical methods. specifically, they implemented two key methodological principles in research methods: sample size and ordinal claims (frick, 1996). students had to work in teams, using internet data bases for developing the theoretical background of the study, the definition of the objectives, the definition of variables, data analysis, and discussion of results. we assessed the attitudes towards research methods before and after the study. results showed that: 1) the students improved their skills in research methods, and 2) the attitudes towards methodology were more positive.
Cálculo de la vecindad mediante grafos en minería de textos
Artigas Fuentes,Fernando; Gil García,Reynaldo; Badía Contelles,José Manuel; Pons Porrata,Aurora;
Universidad, Ciencia y Tecnología , 2008,
Abstract: searching the most similar documents to a given one is crucial in text mining because it is the basic process of many techniques like classification or information retrieval. the documents are usually represented in high-dimensional feature space, where each term appeared in documents is treated as features and the weight of each term reflects its importance in the document. there are many approaches to find the vicinity of an object, but their performance drastically decreases as the number of dimensions grows. this problem prevents its application for documents. in this paper, we present an access method based on a graph structure that determines in an approximate way the vicinity of a novel document. the obtained method has a high selectivity and an acceptable error rate when it is embedded in a classifier and compared with the exhaustive method that evaluates all documents. our experimental analysis shows that it is feasible the use of the proposed method in problems of very high dimensionality, such as text mining.
LA CIUDAD DESDE LA CASA: CIUDADES ESPONTáNEAS EN LIMA
Sáez Giraldez,Elia; García Calderón,José; Roch Pe?a,Fernando;
Revista INVI , 2010, DOI: 10.4067/S0718-83582010000300003
Abstract: in lima, informal settlements emerge from the construction of straw houses in the desert under poverty and precarious conditions. however, after seven decades of existence, they have transformed into relatively integrated neighborhoods in the city, with considerable level of development. this article describes how an urban fabric emerges within inverted planning processes, from large to small scales, from the city to the house (urbanization-division-consruction), being this inversion the engine of its development. straw houses, the only material that enables communities to settle in the territory, apart from offering shelter, have become a strategy for city making. housing is either a workshop or a store, a contribution to the urban fabric; it also changes its functions according to the needs of dwellers; housing expands as the neighborhood densifies, transforming its typology (from house to group home) or nature (rural to urban) when the settlement changes from village to neighborhood. the house expands as the city grows; both elements transform each other, giving dynamism to urban fabric, as well as ability to evolve.
LA CIUDAD DESDE LA CASA: CIUDADES ESPONTáNEAS EN LIMA
Elia Sáez Giraldez,José García Calderón,Fernando Roch Pe?a
Revista INVI , 2010,
Abstract: Los asentamientos informales en Lima surgen de la colocación de casas de estera en el desierto, en condiciones de precariedad y pobreza. Sin embargo, en estas siete décadas de existencia se han transformado en barrios relativamente integrados a la ciudad y con un considerable nivel de desarrollo. En esta investigación se describe cómo se ha generado un tejido urbano donde los procesos habituales de planificación, de la gran escala a la peque a, de la ciudad a la casa (urbanización-parcelación-edificación) se ven invertidos encontrando, en esta inversión, el mecanismo clave de su desarrollo. La casa de estera, en origen el único material para asentarse en el territorio, se convierte, más allá de un techo para sus ocupantes, en una estrategia para crear ciudad. La vivienda es taller o tienda, aportando esos usos al tejido urbano; cambia de funciones según las necesidades de los habitantes; crece a medida que se densifica el barrio, muta su tipología (de unifamiliar a colectiva) o de carácter (de rural a urbana) cuando el asentamiento pasa de pueblo a barrio. La casa crece al tiempo que crece la ciudad que forma; ambos se transforman mutuamente y esta simbiosis confiere al tejido su dinamismo y capacidad para evolucionar.
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