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Search Results: 1 - 10 of 563410 matches for " Juan A. Vázquez García "
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Los caminos de Bolonia
Juan A. Vázquez García
REDU : Revista de Docencia Universitaria , 2011,
Abstract: Una vez que ha arrancado la aplicación efectiva de las reformas que conlleva la implantación del Espacio Europeo de Educación Superior en el sistema universitario espa ol, conviene reflexionar acerca del modo en que efectivamente se está desarrollando y la medida en qué responde al espíritu y los objetivos del “espíritu de Bolonia”. A esa reflexión pretende contribuir este artículo que desgrana algunas ideas acerca de los logros y problemas que la aplicación esa reforma está suscitando en ámbitos como los de la adaptación entre oferta y demanda de titulaciones, la reforma de las ense anzas y la adecuación a las necesidades de la sociedad, la renovación de los métodos docentes, los niveles y las garantías de calidad de las ense anzas universitarias, la movilidad y la internacionalización y el posicionamiento de las universidades. ABSTRACT The ways of Bologna Once the Spanish university system started the actual implementation of the reforms involved in the Bologna process towards an European Higher Education Area, we should reflect on how effectively that process is being developed and analyze to what extent it reflects the spirit and objectives of the first "spirit of Bologna". In this reflection, this article aims to contribute with some ideas on achievements and problems that the implementation of this reform is stirring in the fields as: the fit between supply and demand of qualifications, the reform of studies and its relevance to the needs of society, the renovation of teaching methodologies, the levels and process of university education quality assurance, the mobility and internationalization of teachers and students, the positioning of universities.
Predictors of Electoral Participation among Spanish and Latin American Undergraduates  [PDF]
José Juan Vázquez, Sonia Panadero, Ana B. García-Varela
Sociology Mind (SM) , 2013, DOI: 10.4236/sm.2013.31010
Abstract:

This paper presents the results of a study of 709 undergraduates in Nicaragua, El Salvador, Chile, and Spain, countries with different developmental levels that held the first free elections following their respective dictatorships within a thirteen year span. The paper analyzes the electoral participation of undergraduates in relation to different factors. Results show a high electoral participation among Salvadoran, Nicaraguan, and Spanish undergraduates, while low turnout is observed among Chileans. The best predictors of electoral participation of undergraduates are related to their nationality, economic status, interest in politics, gender or living away from home.

Ernest Lluch: pasión intelectual
Juan Antonio VáZQUEZ GARCíA
Cuadernos Dieciochistas , 2009,
Abstract:
Efecto del fotoperiodo sobre la distribución asimétrica de fetos en los cuernos úterinos de las conejas gestantes
Reyes-Guerrero, G,Vázquez-García, M,García-Juan
REDVET , 2011,
Abstract: ResumenLos cambios estacionales en cuanto a la variabilidad en la duración del periodo de luz, el acceso al alimento, la temperatura y la proximidad de un macho, son las se ales que algunos mamíferos perciben para el inicio de su actividad reproductiva.SummarySeasonal changes in day length and other factors, such as foodavailability, temperature, and proximity of a mate, are signals to adjust the onset of reproductive activity, within the time frame defined in many animal species.
Transmisión horizontal de tuberculosis entre ni os de una guardería
Anibarro García Luis,Vázquez-Vizoso Francisco,Sanjurjo Rivo Ana,García García Juan Carlos
Revista Espa?ola de Salud Pública , 2000,
Abstract:
Validez interna y utilidad diagnóstica del Eating Disorders Inventory en mujeres mexicanas
García-García,Eduardo; Vázquez-Velázquez,Verónica; López-Alvarenga,Juan Carlos; Arcila-Martínez,Denise;
Salud Pública de México , 2003, DOI: 10.1590/S0036-36342003000300010
Abstract: objective: to assess the diagnostic utility and internal validity of the eating disorder inventory (edi-2) in mexican women. material and methods: an observational, cross-sectional study was conducted between october 2000 and january 2001. the sample population consisted of two groups of women: patients diagnosed with anorexia nervosa or bulimia, but no other psychiatric pathology, seen by psychiatrists at the instituto nacional de ciencias médicas y nutrición salvador zubirán (national institute of medical sciences and nutrition salvador zubirán), and a randomly selected sample of women from a school in mexico city. a structured interview was conducted using scid/dsm-iv as the gold standard. finally the edi-2 was administered. statistical analysis was performed using student's t test for independent samples, cronbach's alpha test, and calculation of sensitivity, specificity, and positive and negative predictive values. results: no significant differences were found for weight, height, and body mass index. women with no eating disorders were younger than those with eating disorders (16.7±2.8 vs. 19.9±4.3, p=0.004). the edi-2 total score was clearly different between the groups (53.8±32.4 vs. 146.3±45.6 respectively, p<0.001). all cronbach's alpha coefficients for all subscales were over 0.85. for the total score, a sensitive cutoff point of 80 (sensitivity 90.9, 95% confidence interval [ci] 69.4 to 98.4; specificity 80, 95%ci 58.7 to 92.4) and a specific cutoff point of 105 (sensitivity 81.8, 95%ci 59 to 94; specificity 89.3, 95%ci 70.6 to 97.2) are recommended. conclusions: the edi-2 has a high internal validity and should be a useful tool to assess eating disorders.
Validez interna y utilidad diagnóstica del Eating Disorders Inventory en mujeres mexicanas
García-García Eduardo,Vázquez-Velázquez Verónica,López-Alvarenga Juan Carlos,Arcila-Martínez Denise
Salud Pública de México , 2003,
Abstract: OBJETIVO: Determinar la utilidad diagnóstica y la validez interna del Eating Disorder Inventory (EDI-2) en mujeres mexicanas. MATERIAL Y MéTODOS: De octubre de 2000 a enero de 2001 se invitó a participar a todas las mujeres que a juicio de los psiquiatras de la consulta de anorexia del Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, de la Ciudad de México, padecían anorexia nervosa o bulimia, sin otra patología psiquiátrica. Es un estudio observacional, comparativo, transversal y prolectivo de dos grupos de mujeres: pacientes de la Clínica de Anorexia del Instituto y de una escuela de la Ciudad de México. Se realizó una entrevista clínica estructurada como estándar de oro (SCID/Manual Diagnóstico y Estadístico de los Trastornos Mentales) y la aplicación del Eating Disorder Inventory. El análisis estadístico incluyó t de Student para muestras independientes, coeficiente alpha de Cronbach, sensibilidad, especificidad, valor predictivo positivo y negativo. RESULTADOS: No hubo diferencias significativas en peso, talla e índice de masa corporal entre los grupos. La edad de las mujeres sin trastorno alimentario fue menor (16.7±2.8 vs. 19.9±4.3, p=0.004). La calificación total del Eating Disorder Inventory fue claramente diferente (53.8±32.4 mujeres sin trastorno alimentario vs. 146.3±45.6 pacientes, p<0.001). Para todas las subescalas los coeficientes alpha de Cronbach fueron superiores a 0.85. Para la calificación total se sugiere un punto de corte sensible de 80 [sensibilidad 90.9 (IC 95% 69.4-98.4, especificidad 80 (IC 95% 58.7-92.4)], y uno específico de 105 [sensibilidad 81.8 (IC 95% 59-94), especificidad 89.3 (IC 95% 70.6-97.2)]. CONCLUSIONES: El Eating Disorder Inventory es útil para investigar trastorno alimentario, con coeficientes de validez interna altos en la población estudiada.
La toxicomanía como síntoma: elección, función y mantenimiento.
Miguel ángel Landabaso Vázquez,Juan Sanz Etxeberría,Teresa García Cuasante,Valerio Sánchez Cerezo
Revista de la Asociación Espa?ola de Neuropsiquiatría , 1987,
Abstract: En el presente trabajo, a través de una historia clínica familiar, se revisan brevemente los mecanismos interaccionales que llevan a la elección de un síntoma (heroinodependencia en este caso), las funciones que este síntoma cumple dentro del sistema familiar, como mantenedor del mito familiar, y el modo en que este síntoma se mantiene a lo largo del tiempo en el sistema interaccional familiar. Se concluye con la visión de los autores de la toxicomanía como síntoma de una disfunción familiar compleja.
Spherical Aberration Correction Using Refractive-Diffractive Lenses with an Analytic-Numerical Method
Sergio Vázquez-Montiel,Omar García-Liévanos,Juan Alberto Hernández-Cruz
Advances in Optical Technologies , 2010, DOI: 10.1155/2010/783206
Abstract: We propose an alternative method to design diffractive lenses free of spherical aberration for monochromatic light. Our method allows us to design diffractive lenses with the diffraction structure recorded on the last surface; this surface can be flat or curved with rotation symmetry. The equations that we propose calculate the diffraction profiles for any substratum, for any f-number, and for any position of the object. We use the lens phase coefficients to compensate the spherical aberration. To calculate these coefficients, we use an analytic-numerical method. The calculations are exact, and the optimization process is not required. 1. Introduction Spherical aberration is, in many cases, the most important of all primary aberrations, because it affects the whole field of the lens, including the vicinity of the optical axis. It is due to different focus positions for a marginal ray, meridional ray, and paraxial rays. An alternative to minimize the spherical aberration is to use diffractive optical elements (DOE). Diffractive lenses are essentially gratings with a variable spacing groove which introduces a chromatic aberration that is worse than conventional refractive/reflective optical elements. In some applications, an optical component may require a diffractive surface combined with a classic lens element. By using the diffractive properties, it is possible to design hybrid elements to obtain an achromatically corrected element [1]. In other cases, the requirements can be satisfied by just using a diffractive element. In general, iterative methods are used to design these lenses [2]. Also, some people have used analytical third-order and numerical integrator methods to design diffractive lenses [1, 3]. The diffractive lenses we describe in this paper are limited to monochromatic applications; however, our proposed method is valid for a wide range of wavelengths. We use lens phase coefficients to compensate spherical aberration. To calculate these coefficients, we use an analytic-numerical method. The calculations are exact, simple and quick. A process of optimization is not required. The manufacturing problem of diffractive lenses is not considered here; to solve this problem you can read Castro-Ramos et al. [4]. First, we describe the diffractive lenses theory. Also, we give a brief derivation of the general grating equation to trace a couple of light rays through a rotationally symmetrical surface. Then, we establish the analytic-numerical method to minimize spherical aberration. We propose some heights to correct the spherical aberration.
Prosopagnosia: Un caso de Meningoencefalitis Viral
Ballesteros García,Mario; Fernández Cano,Patricia; Sánchez Tiemblo,Miriam; Fuentes Vázquez,Lourdes; Criado álvarez,Juan José;
Revista Clínica de Medicina de Familia , 2009, DOI: 10.4321/S1699-695X2009000300011
Abstract: prosopagnosia is a disorder characterised by the inability to recognise known faces. its presentation alone with no other neuropsychiatric disorder, especially in viral meningoencephalitis, is uncommon.
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