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Search Results: 1 - 10 of 27092 matches for " Francisco Reyes "
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La malaria en México. Progresos y desafíos hacia su eliminación
Betanzos Reyes, ángel Francisco;
Boletín médico del Hospital Infantil de México , 2011,
Abstract: malaria continues to be a leading parasite disease in the tropics and subtropics including latin america. in this region, most cases of malaria are due to plasmodium vivax, however, cases of plasmodium falciparum continue to lead to cases of severe malaria in many countries in south america. control and elimination of malaria in latin america has been focused on the key steps of the parasite life cycle and transmission mechanism including vector control, decreasing the number of parasites during treatment and human reservoirs with intermittent preventive therapy with antimalarial drugs. in this effort, mexico has collaborated with many countries in central america towards the potential elimination of this parasitic infection. in this review, we discuss the achievements and remaining challenges in controlling and potentially eliminating malaria in mexico.
Concesión de obra y financiación de hospitales públicos: Análisis jurídico para Espa?a
Reyes Santías,Francisco;
Revista de Derecho , 2010,
Abstract: aims: to analyze the available law evidence for on the results of the concession of public contracts for the construction and management of hospitals and its impact on the spanish public health system. methods: bibliographical search and analysis of doctrine and its jurisprudence on the concession contracts for building sanitary infrastructures. results: concession contracts do not serve for managing health care public services. in the public health care system, the change for labour status, could damage health care workers' rights. the insertion of private sector management with authority and responsibility on personnel attending patients generates concerns. conclusions: the concession contracts seem to appear as a solution for financing health care hospitals, but the analysis offers a critical vision.
Patient safety taxonomy: Are we all talking the same language?
Juan Francisco Reyes Revuelta
Páginasenferurg.com , 2012,
Abstract: Currently witnessing exponential growth in the number of publications, reports and research projects to increase knowledge about patient safety, already many countries are addressing the problem and defining their strategies.Despite the remarkable efforts made, it remains one of the main problems the absence of a common taxonomy for Patient Safety, which serves to harmonize the concepts, principles, standards and terms used to work on the subject and thus to strengthen the discipline.The present article gives an overview of this problem goes on to define a set of terms initially considered very important in the field of Patient Safety. Are also provided a series of examples which serve to better understanding by healthcare workers.
Concesión de obra y financiación de hospitales públicos: Análisis jurídico para Espa a
Francisco Reyes Santías
Revista de Derecho , 2010,
Abstract: Objetivos: Analizar la evidencia jurídica disponible sobre los resultados de la concesión de obra pública para la construcción y gestión de hospitales y su trascendencia sobre el sistema sanitario público espa ol. Idem: Búsqueda bibliográfica y análisis de doctrina y jurisprudencia sobre la concesión de obra pública para infraestructuras sanitarias. Idem: La concesión de obra pública no sirve para gestionar servicios sanitarios públicos. En el ámbito público sanitario se producen situaciones de cambio de status laboral que pueden acarrear perjuicios a los interesados. La inserción del sector privado con autoridad y responsabilidad sobre personal en contacto con pacientes genera preocupación. Idem: Las concesiones se presentan como solución a los problemas de puesta en funcionamiento de infraestructuras sanitarias, pero el análisis ofrece una visión crítica
Dinámica de la literatura citada en la Física mexicana en el período de mayor crecimiento
Collazo Reyes, Francisco
Revista Espa?ola de Documentación Científica , 2002,
Abstract: An analysis of the thematic categories of the reported references in the scientific literature of the Mexican physics in the period 1990-1999 was made, with the purpose of determining the thematic lines of influence of the area at the moment of its greatest growth. Two modules were used: one of references and another of JCR thematic categories and the PACS classification system. Two different situations were found: on the one hand, in quantitative terms a clearly endogenous pattern of influences, strongly dependent on central literature of the area and, on the other hand, according to the diversity of thematic areas, a rising pattern of influences for the decade of the nineties. Se realizó un análisis de las categorías temáticas de las referencias reportadas en la literatura científica de la física mexicana en el periodo de 1990-1999, con el fin de determinar las líneas temáticas de influencia del área en su momento de mayor crecimiento. Se utilizaron dos módulos: uno de referencias y otro de categorías temáticas JCR, y el sistema de clasificación PACS. Se encontraron dos situaciones distintas: por un lado, en términos cuantitativos un patrón de influencias claramente endógeno, fuertemente dependiente de la literatura central del área y, por otro lado, de acuerdo a la diversidad de áreas temáticas, un patrón de influencias naciente para la década de los a os 90.
ética, teoría del sujeto y acción social (Ethics, the subject theory and sociall action)
Francisco Landa Reyes
Revista Mal-estar e Subjetividade , 2002,
Abstract: Se invita aquí a la discusión interdisciplinaria en torno a la pregunta ética, a partir de la propuesta psicoanalítica de una irresoluble inaprehensibilidad del sujeto, así como a la construcción conjunta del destino colectivo y la reformulación de lo social en dos profesiones que Freud denunciaba ya como imposibles: la psicoterapéutica, la pedagogía.
Navier-Stokes hydrodynamics in a granular gas fluidized by a non-uniform stochastic field
Francisco Vega Reyes
Physics , 2013,
Abstract: We show a case of steady flow in a granular gas that, for small shear rates, is accurately described by Navier-Stokes hydrodynamics, even for high inelasticity. The (low density) granular gas is composed of identical inelastic spheres and is fluidized by a temperature field produced by a stochastic volume force plus thermal walls. We prove that the theoretical Navier-Stokes transport coefficients exhibit good agreement with numerical solutions of the corresponding the kinetic equation (direct simulation Monte Carlo method) in the steady state.
Non-linear plane perturbation in a non-ohmic/ohmic fluid interface in a vertical electric field
Francisco Vega Reyes
Physics , 2004,
Abstract: The stability of a non-ohmic/ohmic fluid interface in the presence of a constant gravitational field and stressed by a vertical stationary electric field with unipolar injection is studied, focusing on the destabilizing action of the electric pressure when charge relaxation effects can be ignored. We use a hydraulic model, whose static equilibrium condition is written and analysed as a function of the ohmic fluid conductivity when subjected to a non-linear perturbation. The combined action of the polarization and free interfacial charges on the pressure instability mechanism is also analysed. The results show some important peculiarities of the fluid interface behaviour in the presence of a stationary space charge distribution generated by unipolar injection in the non-ohmic fluid.
Dehydration of Agro Products in a Hybrid Solar Dryer Controlled through a Fuzzy Logic System  [PDF]
Alejandro Reyes, Francisco Cubillos, Andrea Mahn, José Vásquez
International Journal of Modern Nonlinear Theory and Application (IJMNTA) , 2014, DOI: 10.4236/ijmnta.2014.33009
Abstract:

Drying is one of the most energy-intensive processes in agro-products industry. For this reason, using solar energy appears as an attractive not polluting alternative to be used in drying processes. However, the daily and seasonal fluctuations in the radiation level require using energy accumulators with phase change materials (paraffin wax), to have a continuous drying processes. In hybrid solar dryers with energy accumulation system, a control system is essential to coordinate the control valves that allow the income of air that comes from the solar panel or from the energy accumulator. In this work, we implemented an advances multivariable control system that uses fuzzy logic in the hybrid solar dryer. The dryer includes an energy accumulator panel with paraffin wax as phase change material. The input variables were ambient temperature and solar radiation, both not controllable. The controlled variables were the opening level of the solar panel and accumulator energy valves. The control program consisted in an algorithm implemented with the “Fuzzy” toolbox in Matlab. Data were acquired with OPTO 22. The control system performed adequately when used to dehydrate mushroom slices and plums. Closing or opening the respective valves as a response to the variations of solar radiation and ambient air temperature allowed optimizing the use of solar energy.

 

Mass transport of impurities in a moderately dense granular gas
Vicente Garzo,Francisco Vega Reyes
Physics , 2008, DOI: 10.1103/PhysRevE.79.041303
Abstract: Transport coefficients associated with the mass flux of impurities immersed in a moderately dense granular gas of hard disks or spheres described by the inelastic Enskog equation are obtained by means of the Chapman-Enskog expansion. The transport coefficients are determined as the solutions of a set of coupled linear integral equations recently derived for polydisperse granular mixtures [V. Garz\'o, J. W. Dufty and C. M. Hrenya, Phys. Rev. E {\bf 76}, 031304 (2007)]. With the objective of obtaining theoretical expressions for the transport coefficients that are sufficiently accurate for highly inelastic collisions, we solve the above integral equations by using the second Sonine approximation. As a complementary route, we numerically solve by means of the direct simulation Monte Carlo method (DSMC) the inelastic Enskog equation to get the kinetic diffusion coefficient $D_0$ for two and three dimensions. We have observed in all our simulations that the disagreement, for arbitrarily large inelasticity, in the values of both solutions (DSMC and second Sonine approximation) is less than 4%. Moreover, we show that the second Sonine approximation to $D_0$ yields a dramatic improvement (up to 50%) over the first Sonine approximation for impurity particles lighter than the surrounding gas and in the range of large inelasticity. The results reported in this paper are of direct application in important problems in granular flows, such as segregation driven by gravity and a thermal gradient. We analyze here the segregation criteria that result from our theoretical expressions of the transport coefficients.
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