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Search Results: 1 - 10 of 419702 matches for " Juan Ramón Fernández López "
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PADDLING PERFORMANCE AND RANKING POSITION IN JUNIOR SURFERS COMPETING AT THE ASSOCIATION OF SURFING PROFESSIONALS: A PILOT STUDY CAPACIDAD DE REMADA Y POSICIóN EN EL RANKING DE SURFISTAS JUNIOR DE LA ASOCIACIóN DE SURFISTAS PROFESIONALES: UN ESTUDIO PILOTO
Jesús Cámara,Sara Maldonado-Martín,Juan Ramón Fernández López,Moises González Goyonaga
E-balonmano.com : Revista de Ciencias del Deporte , 2011,
Abstract: The aims of this pilot study are on one hand, to evaluate the upper body aerobic characteristics of junior surfers competing at the European branch of the Association of Surfing Professionals (ASP) and on the other, to assess the relationship between the junior surfers' upper body aerobic characteristics and their ranking position. Ten surfers competing at the European junior branch of the ASP took part in the study. The maximal oxygen uptake (VO2MAX), the maximum power output (WMAX), the maximum lactate concentration [La]MAX, the maximum heart rate (HRMAX) and the power output at the intensity where the lactate threshold and the onset of blood lactate accumulation are produced (WLT and WOBLA) were determined during an incremental maximal test in a swim bench ergometer. It was observed a lack of a significant relationship between the ranking position and the parameters at maximal intensity (VO2PEAK, WMAX, HRMAX y [La]MAX). The WLT (W · kg-1) and the WOBLA (W · kg-1) were significantly related to ranking position (r= -0.69, p= 0.02; r= -0.72, p= 0.01, respectively). Resumen Los objetivos de este estudio piloto son por un lado, determinar las características aeróbicas de surfistas junior que compiten en la rama Europea de la Asociación de Surfistas Profesionales (ASP) y por otro, analizar la relación de estas características con la posición en el ranking. Diez surfistas tomaron parte en el estudio. Se realizó un test máximo incremental en un ergómetro. Se determinaron el consumo máximo de oxígeno (VO2MAX), la potencia máxima (WMAX), la frecuencia cardiaca máxima (HRMAX), la máxima producción de lactato en sangre ([La]MAX) y la potencia en el umbral de lactato (WLT) y en el inicio de la acumulación de lactato en sangre (WOBLA). No se observó una relación significativa entre la posición en el ranking y los parámetros a intensidad máxima (VO2MAX, WMAX, HRMAX y [La]MAX). La WLT (W · kg-1) y la WOBLA (W · kg-1) mostraron una relación significativa con la posición en el ranking (r= -0.69, p= 0.02; r= -0.72, p= 0.01, respectivamente).
Seroepidemiología frente a citomegalovirus en la Comunidad de Madrid
Ory Manchón Fernando de,Sanz Moreno Juan Carlos,Casta?eda López Rosario,Ramírez Fernández Rosa
Revista Espa?ola de Salud Pública , 2001,
Abstract: Fundamento: La infección por citomegalovirus (CMV) es frecuentemente asintomática. Sin embargo, constituye una importante causa de infección congénita y de patología severa en sujetos inmunodeprimidos, por lo que representa un problema en Salud Pública. El objeto de este trabajo fue conocer la prevalencia de IgG frente a CMV (IgG-CMV) en la población general madrile a. Métodos: Estudio transversal en el que se detectó IgG-CMV en una muestra representativa de la población general de la Comunidad de Madrid de entre 2 y 60 a os (n=2030). Se realizó un muestro bietápico estratificado por conglomerados (octubre de 1993 y febrero de 1994). Para el análisis estadístico se emplearon los test de *2 y *2 de tendencia lineal y se calcularon los porcentajes de seroprevalencia y los odds ratios con intervalos de confianza del 95%. Resultados: La seroprevalencia global fue del 62,8% (IC95%: 60,6-64,9); 66,7% (IC95%: 63,7-69,5) en mujeres y del 58,4% (IC95%: 55,2-61,5) en hombres. Se observó una asociación significativa entre el aumento de la edad y el incremento de la seroprevalencia. Fueron factores significativos de riesgo la consulta al dentista, antecedentes de cirugía, acupuntura y tatuajes. Los estudios superiores constituyeron un factor protector. Conclusión: Aunque los factores de riesgo detectados indican una posible transmisión vía sanguínea, la elevada prevalencia apunta a la existencia de otras vías mas comunes. El aumento de la seroprevalencia dependiente de la edad sugiere que se produce un número importante de infecciones en la edad adulta. No se puede excluir, sin embargo, que este aumento responda a un efecto cohorte debido a mejoras socioeconómicas similar al detectado para otros virus.
Seroepidemiología frente a citomegalovirus en la Comunidad de Madrid
Ory Manchón,Fernando de; Sanz Moreno,Juan Carlos; Casta?eda López,Rosario; Ramírez Fernández,Rosa; León Rega,Pilar; Pachón del Amo,Isabel;
Revista Espa?ola de Salud Pública , 2001, DOI: 10.1590/S1135-57272001000100007
Abstract: background: cytomegalovirus (cmv) is frequently assympomatic. however, it constitutes an important cause of congenital disease and severe pathology in immunodepressed patients, thus representing an important problem in public health. the object of this work was to study the prevalence of igg against cmv (igg-cmv) in the general population from madrid. methods: it is a transversal study, in which igg-cmv was assayed in a representative sample of the general population from the region of madrid, aged 2 to 60 years (n=2030). participants were recruited by a two-stage cluster sample procedure from those attending primary health care centres between october, 1993 and february, 1994. for the statistical analysis the *2 and *2 lineal trend tests were employed. the percentages of seroprevalence and the specific odds ratios were calculated with confidence intervals of 95%. results: the overall seroprevalence has been 62,8% (ic95% 60,6-64,9), ranging from 58,4% (ic95% 55,2-61,5) in men to 66,7% (ic95% 63,7-69,5) in women. a significant association between increase of the age and increment of the seroprevalence was observed. the consult to dentistry, the antecedent of surgery, as well as tattooing and acupuncture has been identified as risk factors of acquiring the infection. on the other hand, to have carried out university studies seems to act as a significant factor of protection. conclusions: although the risk factors detected risk indicates a transmission by blood, the high prevalence suggests the existence of other more common ways. the age-dependent seroprevalence increase confirms an important number of infections in the adult age. however, it cannot be exclude that this increase responds to an effect cohort due to socio-economic improvements similar to the detected for other virus.
Hábitos, características psicosociales y resultados del aprendizaje en educandos de primaria en"Cayo Hueso", La Habana
Ortiz Martínez,Mayelín; Aguilar Valdés,Juan; Fernández Día,Yaíma; Suárez Medina,Ramón; Acosta Quintana,Leanne; Escobar Rojas,Vladimir; Froilán López,José;
Revista Cubana de Higiene y Epidemiolog?-a , 2011,
Abstract: ministry of education take actions to fulfil the objectives of the third educational revolution; one is the multicenter project leaded by the central institute of educational science, "learning for everybody" where authors requested to national institute of hygiene, epidemiology and microbiology the carrying out of an study to characterize the life habits and the psychosocial features of primary school students, according to the results of their learning and that are related to habits and the psychosocial features with the academic results. the study was complex, combined, cross sectional, descriptive and analytical (case-control) conducted in the first to sixth grades students from the six educational institutions of primary teaching of the above mentioned council during the school course 200-2007. to fulfill the objectives the mother filled a questionnaire with questions on the educational history of children, habits and behaviors. there were identified inappropriate life habits and behaviors with predominance in students with learning problems including: to play in excess, an insufficient sleep hours or with difficulties for it, bad relationships with parents and other family members, the violent behavior, restless and impulsive, to be sad without any reason, no satisfied with the studies and to hate the frustrations. the risk factors included the above mentioned situations. as a protector factor was to read in the spare time.
Condiciones ambientales del hogar y resultados académicos de educandos de primaria del Consejo Popular "Cayo Hueso" (2007)
Ortiz Martínez,Mayelín; Aguilar Valdés,Juan; Fernández Díaz,Yaíma; Suárez Medina,Ramón; Acosta Quintana,Leanne; Escobar Rojas,Vladimir; Froilán López,José;
Revista Cubana de Higiene y Epidemiolog?-a , 2011,
Abstract: the objective of present study was to characterize the identified environmental conditions and the academic results of students. study was complex and combined and cross-sectional, descriptive and analytical (case-control). the students from first to sixth degrees from the six educational institutions of primary education from the above mentioned council. to fulfill the proposed objectives, in all mothers we applied a questionnaire with questions to explore the educational history of theirs children, habits and behaviors. results were expressed in percentages by educational institutions. the conditions of a inappropriate life at homes of students were identified that may be like risk factors for health of for learning. alcohol ingestion and smoking at home, as well as the social risk of its environment, were the inappropriate habits more related to learning problems.
Análisis Probabilista de Seguridad de tratamientos de radioterapia con un acelerador lineal de uso médico
Vilaragut Llanes,Juan José; Ferro Fernández,Rubén; Rodríguez Martí,Manuel; Ortiz López,Pedro; Ramírez,María Luisa; Pérez Mulas,Arturo; Barrientos Montero,Marta; Somoano,Fernando; Delgado Rodríguez,José Miguel; Papadópulos,Susana B; Pereira Jr,Pedro Paulo; López Morones,Ramón; Larrinaga Cortina,Eduardo; Rivero Oliva,José de Jesús; Alema?y,Jorge;
Nucleus , 2010,
Abstract: abstract this paper presents the results of the probabilistic safety assessment to the radiotherapy treatment with an electron linear accelerator for medical use, which was conducted in the framework of the iberian-american forum of radiological and nuclear regulatory agencies. potential accidental exposures during the treatment of patients, workers and members of the public were assessed, although the study was mainly focused on patients. the methodology of failure modes and effects analysis was used to define accident initiating events and methods of event tree and fault tree analysis to determine the accident sequences that may occur. after quantifying the frequency of occurrence of the accident sequences, an important analysis was carried out in order to determine the most significant events from the point of view of safety. the major contributors to risk were identified as well as the most appropriate safety recommendations to reduce it.
Convergencias conceptuales entre las teorías del aprendizaje implícito y la Psicología Evolucionista
López-Ramón,María Fernanda; Fernández Acevedo,Gustavo;
Interdisciplinaria , 2007,
Abstract: throughout the years, a wide range of systems, trends, schools of thought and paradigms have fought to become researchers' and professionals' number one field of study. in psychology, however, competing has only produced noticeable theoretic dispersion. the aim of the present article is to contribute to the discussion on theoretical integration by analyzing conceptual convergences between two widely circulating perspectives that are also under current development: the theories of implicit learning (il) and a research program known as evolutionary psychology (ep). both theories have gradually gained increasing importance among current theory trends. the theories of implicit learning, on one hand, have evolved based on empirical data and have revealed their presence in different experimental paradigms and among diverse populations. on the other hand, over the past few years ep has achieved considerable relevance in the theoretic framework, and has provided evolutionary explanations about a great deal of psychological phenomena. in the first two sections we briefly describe the general characteristics of il and ep, in order to later analyze possible convergences between both perspectives. firstly, we show the main conceptual principles of il based on the analysis made by frensch who classifies the main existing definitions according to different topics: the stimuli that are involved in the acquisition context, the phenomenological character of the process, the structure complexity of implicit learning content, the existing relationship between il and neural mechanisms that are different from those in explicit learning, and the functional relationship between il and attention mechanisms. in the second section, we identify three main theoretical aspects of evolutionary psychology: the adjustment assumption (according to which mental systems have emerged basically as features that contribute to an organism's successful reproduction); computational modularity hypothesis (t
Motivación del personal sanitario en la formación continuada sobre tratamiento quimioterápico
García Fernández,José Ramón; López Berenguel,Francisco;
Educación Médica , 2003, DOI: 10.4321/S1575-18132003000100007
Abstract: introduction: pharmacological treatment with cytostatic agents is an important part of hospital practice. in community hospitals this activity is specially difficult to develop, by the tendency of the staff to consider this specific of the third level hospitals. postgraduate continuing education plays a central role in the process, and the motivation to participate in these is also essential. design and methods: we describe the development of an activity of postgraduate continuing education in a community hospital. the interest of the experience is how motivate health staff in order to participate actively in work out organizated learning with several methods: previous exhaustive information, possibility of participate as teacher, educative and economic advantages,.. . first of all we settled 4 objetives: 1o: attendance of all health staff related, 2o: real increase of knowledge, 3o: acquirement of specific habilities and 4o: that the course must be based on the integral aid of oncologic patient. the objetives were evaluated by: 1o: list of attendance, 2o and 3o: anonymous questionnaire realized before and after the course, and 4o: subjetive appraisal. results: 53 hospital′s health staff assisted continually to the course, above all nurses, of a "target" population of 456. the objetives propposed were reached respectively in a : 75 %, 50 %, 75 % and 100%. conclusion: the health staff more motivated in postgraduate continuing education in basic oncology are: postgraduate physicians, nurses and curiously laboratory technicians. habitual contact with chemotherapy treatments was the most important factor to assist to the course. the methods used in order to motivate the attendance only were successful by the staff motivated "a priori" in the performance the course.
Actividades intersectoriales en la prevención de accidentes de tráfico
Peiró,R.; López,F.; Marrodán,J.; Fernández,C.; Ramírez,C.;
Gaceta Sanitaria , 2003, DOI: 10.1590/S0213-91112003000400014
Abstract: we describe priority issues and some of the results obtained from the implementation of the ?prevention and reduction of traffic accident injuries? program in a health area. since 1999 the public health center has made a priority of identifying and recruiting partners from other sectors (the local police association and the local education authority), increasing its capacity for working together, and setting up an intersectorial working group. teaching activities and meetings were held. a network of people was created from 17 of a total of 39 town halls that participate in activities supported by the intersectorial group. ten are involved in educational activities and a further seven focus on ensuring compliance with the law. the intersectorial group promoted their visibility through the local media. these activities are not aimed at reducing injuries from road traffic accidents, but rather at creating an action framework through which all the sectors involved can be mobilized. the aim is to strengthen commitment among political, technical and civil sectors by focussing on social values of respect for a healthier life.
Sedimentación en comunidades arrecifales de Bahías de Huatulco, Oaxaca, México
Granja Fernández,María R; López Pérez,Ramón A;
Revista de Biología Tropical , 2008,
Abstract: sedimentation on reef communities at bahías de huatulco, oaxaca, mexico. although coral reef sedimentation is important because it modifies processes like symbioses, reproduction, recruitment and coral growth, mexican pacific studies are lacking. on this regard, spatio-temporal variations in sedimentation rate were investigated in six coral reef communities from oaxaca. during february 2006-january 2007 (excluding april, july and august) two sediment structures, with four sediment traps each, were randomly installed. sediment traps were replaced with a mean periodicity of 38 days, and the sediments were washed, filtered, dried and weighted in order to calculate sedimentation rate. sedimentation rate was heterogeneous among localities 7.06, p < 0.01). it was high at isla montosa (653.31 kg m-2 year-1) and isla cacaluta (450.09 kg m-2 (f5,36 = year-1), intermediate at san agustín, jicaral-chachacual and dos hermanas (155.18-92.53 kg m-2 year-1) and low at la entrega (14.33 kg m-2 year-1). sedimentation rate was homogeneous through time (f7,34 = 0.85, p > 0.5); nonetheless, during the dry season (november-march) sedimentation rate in the area oscillated between 6.8-73.5 mg cm-2 day-1, whereas during the rainy season (may-october) the values were 141-1088 % higher (74.5-147.6 mg cm-2 day-1, mann-whitney u = 137, n = 42, p = 0.03). there was a significant relationship between sedimentation rate and pluvial precipitation (spearman r = 0.83, n = 8, p = 0.009), suggesting that the amount of sediment reaching coral communities is closely tied to regional precipitation. sedimentation rates recorded at isla montosa (366.64 mg cm-2 day-1) and isla cacaluta (366.03 mg cm-2 day-1) during the rainy season can be considered lethal-sublethal considering sediment tolerance and rejection efficiency of stony corals. the absence of coral mortality during the rainy season may result from: a) high efficiency of active sediment removal, b) increased physiological tolerance to sediments, an
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