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Search Results: 1 - 10 of 19241 matches for " Ricardo Irastorza "
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Saberes en movimiento: denuncia y novedad epistemológica
Florencia Páez,Marcelo Casarin,Ricardo Irastorza
Espacio Abierto , 2011,
Abstract: Si el patrón de conocimiento científico supone la plataforma epistemológica del modelo de civilización occidental asociado al sistema capitalista, vinculado estrechamente a las situaciones de injusticia frente a las que surgen y accionan los movimientos sociales qué características asumen los saberes consustanciados con los intereses de transformación de la sociedad de estos movimientos? El propósito del ensayo es describir algunas de las particularidades que asumen estos saberes en movimiento . A su vez, intentaremos esbozar las tensiones entre éstos y determinados condicionamientos del conocimiento científico, expresados en los cánones que regulan la publicación de las ciencias sociales. Los "saberes en movimiento" tienen dos dimensiones: una de denuncia y otra que aporta la "novedad" epistemológica; se originan dentro y fuera de la academia desde múltiples patrones y se legitiman en los mismos procesos de transformación.
Revista de Revistas.
Javier Irastorza
Revista de la Asociación Espa?ola de Neuropsiquiatría , 1988,
Abstract: Sin resumen.
SCORPION ENVENOMATION IN LARA STATE, VENEZUELA: A HISTORICAL PERSPECTIVE
I. Maradei-Irastorza
Journal of Venomous Animals and Toxins , 1999, DOI: 10.1590/s0104-79301999000100020
Abstract:
Physics at Underground Laboratories: Direct Detection of Dark Matter
Igor G. Irastorza
Physics , 2009,
Abstract: Underground laboratories host two kind of experiments at the frontier of our knowledge in Particle Physics, Astrophysics and Cosmology: the direct detection of the Dark Matter of the Universe and the search for the Neutrinoless Double Beta Decay of the nuclei. Both experimental quests pose great technical challenges which are being addressed in different ways by an important number of groups. Here a updated review of the efforts being done to detect Dark Matter particles is presented, emphasizing latest achievements.
Direct searches for Dark Matter Particles: WIMPs and axions
Igor G. Irastorza
Physics , 2005,
Abstract: WIMPs and axions are the two best motivated candidates to compose the Dark Matter of the Universe. An important number of experimental groups are developing and using different techniques for their direct detection. An updated review of current searches is done, emphasizing latest results
Direct detection of dark matter axions with directional sensitivity
Igor G. Irastorza,Juan A. García
Physics , 2012, DOI: 10.1088/1475-7516/2012/10/022
Abstract: We study the directional effect of the expected axion dark matter signal in a resonant cavity of an axion haloscope detector, for cavity geometries not satisfying the condition that the axion de Broglie wavelength $\lambda_a$ is sufficiently larger than the cavity dimensions $L$ for a fully coherent conversion, i.e. $\lambda_a \gtrsim 2\pi L$. We focus on long thin cavities immersed in dipole magnets and find, for appropriately chosen cavity lengths, an O(1) modulation of the signal with the cavity orientation with respect the momentum distribution of the relic axion background predicted by the isothermal sphere model for the galactic dark matter halo. This effect can be exploited to design directional axion dark matter detectors, providing an unmistakable signature of the extraterrestrial origin of a possible positive detection. Moreover, the precise shape of the modulation may give information of the galactic halo distribution and, for specific halo models, give extra sensitivity for higher axion masses.
Capacity to Vote in Persons with Dementia and the Elderly
Luis Javier Irastorza,Pablo Corujo,Pilar Ba?uelos
International Journal of Alzheimer's Disease , 2011, DOI: 10.4061/2011/941041
Abstract: The capacity to vote in patients with mental illness is increasingly questioned. The objective of this study is to evaluate this capacity in a group of subjects with dementia (Alzheimer's disease) and other elderly subjects without dementia. With a sample of 68 subjects with dementia and 25 controls living in a senior residence, a transversal study was carried out over 4?months. Subjects were evaluated with the Mini-Mental State Examination (MMSE) and the Competence Assessment Tool for voting (CAT-V). The results were more positive for the Doe criteria (as part of the CAT-V), and a correlation was found with the MMSE in subjects with dementia and, to a lesser degree, in the controls. We conclude that the capacity to vote is related to cognitive deterioration and, within that, is more related to understanding and appreciation. 1. Introduction Voting is a legal right in many countries. But the exercise of this right does not mean that all persons have the capacity to vote. There might be cases of people with the competence to vote, but without the necessary capacity. For this reason, there is increasingly more literature seeking a tool to evaluate the capacity to vote, for patients with dementia as well as other mental disorders, such as those hospitalized with acute symptoms, and so forth [1–4]. In the evaluation of the capacity for the act of voting, there are 6 questions that evaluate the functional abilities of the person, based on the 4 standard decision-making abilities: understanding, choice, reasoning, and appreciation. Some of these questions come from the standard questionnaire of a federal court, related to understanding the nature of voting, understanding its effect and vote selection in Maine, USA (Doe criteria) [5]. In addition, items have been added incorporated in the CAT-V test [2]: comparative reasoning, consequential reasoning, and appreciation. This instrument has been used in various studies [2–4]. However, doubt persists as to which items to use for screening and to which persons. What should be the cutoff point? Should some items be weighted more than others? Our study attempts to resolve these questions in two ways: using the MMSE [6] as a cognitive variable and the CAT-V as a voting test in two samples: one group of patients with Alzheimer’s dementia living in a senior residence and a second group of persons living in the same residence who suffer no mental illness. 2. Materials and Methods 2.1. Participants The study included 68 patients residing in the Arganda del Rey Senior Residence, diagnosed with Alzheimer’s dementia
Perfil nutricional de los menús e ingesta dietética en comedores escolares de Vizcaya Nutritional profile of foods offered and dietary intake in school canteens in Biscay
B. Zulueta,I. Xarles Irastorza,P. Oliver,Z. García
Nutrición Hospitalaria , 2011,
Abstract: Introducción: Los comedores escolares han pasado a ocupar un lugar central en la alimentación y en la educación nutricional de los ni os en edad escolar. Objetivos: Evaluar la adecuación nutricional de los menús escolares y la ingesta de los alumnos. Métodos: Se seleccionaron aleatoriamente 1.500 bandejas en seis comedores escolares de Vizcaya y se evaluó la ingesta de los alumnos mediante la técnica de doble pesada y la estimación visual de los residuos. Resultados: Evaluación de los menús: Principios Inmediatos: hidratos de carbono 48%, proteínas 20%, lípidos 32%. Oferta semanal: Primer plato: verdura 1,1; legumbre 1,8; patatas 0,4; pasta-arroz 1,7. Segundo plato: carne 2,5; pescado 1,4; huevos 0,6; precocinados fritos 0,5. Guarnición: patatas 0,5; salsas 0,8; lechuga 1,7; vegetales cocinados 1; sin guarnición 1. Postre: fruta 2,8; lácteos 2; otros 0,2. Se han detectado cambios significativos en el 4% de los menús. La guarnición vegetal no se sirve en el 40% de las ocasiones. El 70% no comen la guarnición vegetal. Conclusiones: Aunque la oferta teórica de vegetales es adecuada, debido a que frecuentemente no se sirven los vegetales en guarnición y a que cuando se sirven los alumnos no se los comen, su ingesta efectiva es deficiente. El aporte proteico es superior al recomendado. Se producen con frecuencia cambios importantes en la composición de los menús. Introduction: Nowadays the school canteen occupies a central place in the supply and in the nutritional education of the children in school age. Objectives: To assess the nutritional adequacy of the school menus and the food intake of the children. Methods: 1,500 trays were selected in six school dining rooms of Biscay. Dietary intake was evaluated by means of the technique of double weighed and visual estimation of the residues. Results: Evaluation of the menus: Macronutrients: carbohydrates 48%, proteins 20%, lipids 32%. Weekly offer: The first plate: vegetables 1.1; legumes 1.8; potatoes 0.4; pasta-rice 1.7. The second plate: meat 2.5; fish 1.4; eggs 0.6; precooked fried food 0.5. Garnish: potatoes 0.5; sauces 0.8; lettuce 1.7; cooked vegetables 1; no garnish 1. Dessert: fruit 2.8; dairy product 2; other 0.2. Significant changes have been observed in 4% of the menus. The vegetable garnish is not served in 40% of the occasions. 70% do not eat the vegetable garnish. Conclusions: Though the theoretical offer of vegetables is appropriate, due to the fact that frequently the vegetables are not served in garnish and to that when they are served children do not eat them, their final intake is poor. The
An extension of the standard model with a single coupling parameter
Mario Atance,Jose Luis Cortes,Igor G. Irastorza
Physics , 1997, DOI: 10.1016/S0370-2693(97)00511-X
Abstract: We show that it is possible to find an extension of the matter content of the standard model with a unification of gauge and Yukawa couplings reproducing their known values. The perturbative renormalizability of the model with a single coupling and the requirement to accomodate the known properties of the standard model fix the masses and couplings of the additional particles. The implications on the parameters of the standard model are discussed.
Physics Potential and Prospects for CUORE and CUORICINO experiments
I. G. Irastorza,A. Morales,S. Scopel,S. Cebrian
Physics , 2001,
Abstract: The CUORE (Cryogenic Underground Observatory for Rare Events) experiment projects to construct and operate an array of 1000 cryogenic thermal detectors of a mass of 760 g each to investigate rare events physics, in particular, double beta decay and non baryonic particle dark matter. A first step towards CUORE is CUORICINO, an array of 56 of such bolometers, currently being installed in the Gran Sasso. In this paper we report the physics potential of both stages of the experiment regarding neutrinoless double beta decay of 130Te, WIMP searches and solar axions.
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