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Search Results: 1 - 10 of 23580 matches for " Roberto Tapia Conver "
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Iniciativa México: Propuesta para el control y vigilancia epidemiológica de la enfermedad de Chagas en México
Salazar Schettino,Paz María; Cravioto Q,Alejandro; Tapia Conver,Roberto;
Boletín chileno de parasitología , 2001, DOI: 10.4067/S0365-94022001000200008
Abstract: it is showed the programme for the knowledge, control and epidemiological surveillance of chagas disease in mexico.
Iniciativa México: Propuesta para el control y vigilancia epidemiológica de la enfermedad de Chagas en México Mexico iniciative: A proposal for the epidemiological control and surveillance of Chagas disease in Mexico
Paz María Salazar Schettino,Alejandro Cravioto Q,Roberto Tapia Conver
Boletín chileno de parasitología , 2001,
Abstract: It is showed the programme for the knowledge, control and epidemiological surveillance of Chagas disease in Mexico.
Generation and Control of Turbulences in a Wind Tunnel  [PDF]
América Torres, Roberto Tapia, Antonio Ramos
Open Journal of Fluid Dynamics (OJFD) , 2016, DOI: 10.4236/ojfd.2016.64033
Abstract: In this paper, the generation and control of turbulences in a wind tunnel, for design, analysis and testing of test objects are proposed. Modifications to the wind tunnel are made in order to generate the turbulences in the test chamber. Specifically, for the turbulence analysis, the reflective symmetry concept is used in order to group the different turbulences cases generated in the wind tunnel test chamber. The Ansys software is used in order to model and analyze the wind tunnel. Specific platform or module known as Fluent is used for the analysis of the turbulence generated in the wind tunnel. To design proposal of a wind tunnel capable to generate and controlling turbulences is exposed in this paper. For this, the controller design and verification are performed by means of simulations. To obtain the control law structure, the inversion concept is used. The proposed control law is validated via a co-simulation implemented in the Simplorer module, with the aim of combining the power electronics part, controller and engine, with the proposed model wind tunnel.
Concesiones en Salud, un Modelo Válido para la Reconstrucción y Transformación de la Red Hospitalaria en Chile
Revista chilena de pediatría , 2010,
The Analysis of Water Management in Arid and Semi-Arid Zones: an Action Proposal
Roberto Pizarro Tapia
Revista CIDOB d'Afers Internacionals , 1999,
Abstract: The management of a basic resource like water takes on, obviously, more relevance in arid or semi-arid zones. Being a scarce resource in these areas, water has generated a wide range of multiple conflicts and interests regarding its control. The effective application of astrategy of preservation and maximum usage of this resource should be achieved according to plans that have foreseen not only the various aspects concerned (the technical, economical and, in particular, the social ones), but also the distinct actors involved in carrying the plans out. With such a strategy in mind, this article describes a situational diagnosis of the Management Plan for Water Resources in arid and semi-arid zones. This Plan, which was originally created with Latin America in mind, is now thought to be applicable in other parts of the world having similar characteristics. The structure of the Plan’s action is supported, ineluctably, upon a willingness to integrate community efforts. Parting from a clear and precise determination of the real and feasible objectives to be reached, the Plan depends upon a sense of community being created among the agents involved (technical specialists, institutions from all areas, the local population...) that would give the Plan its operative capacity.
Prevención y control de la epidemia mundial del tabaquismo: una estrategia integral
Tapia Conyer Roberto
Salud Pública de México , 2000,
Infecciones nosocomiales
Tapia Conyer Roberto
Salud Pública de México , 1999,
Development of Upstream Data-Input Models to Estimate Downstream Peak Flow in Two Mediterranean River Basins of Chile  [PDF]
Roberto Pizarro-Tapia, Rodrigo Valdés-Pineda, Claudio Olivares, Patricio A. González
Open Journal of Modern Hydrology (OJMH) , 2014, DOI: 10.4236/ojmh.2014.44013
Abstract: Accurate flood prediction is an important tool for risk management and hydraulic works design on a watershed scale. The objective of this study was to calibrate and validate 24 linear and non-linear regression models, using only upstream data to estimate real-time downstream flooding. Four critical downstream estimation points in the Mataquito and Maule river basins located in central Chile were selected to estimate peak flows using data from one, two, or three upstream stations. More than one thousand paper-based storm hydrographs were manually analyzed for rainfall events that occurred between 1999 and 2006, in order to determine the best models for predicting downstream peak flow. The Peak Flow Index (IQP) (defined as the quotient between upstream and downstream data) and the Transit Times (TT) between upstream and downstream points were also obtained and analyzed for each river basin. The Coefficients of Determination (R2), the Standard Error of the Estimate (SEE), and the Bland-Altman test (ACBA) were used to calibrate and validate the best selected model at each basin. Despite the high variability observed in peak flow data, the developed models were able to accurately estimate downstream peak flows using only upstream flow data.
Coeficientes de escorrentía instantáneos para la cuenca del río Tutuvén, VII Región del Maule, Chile Instantaneous runoff coefficients for Tutuvén river basin, Maule Region, Chile
Roberto Pizarro Tapia,Marcela Tapia Cornejo,Leonardo Román Arellano,Cristián Jordán Díaz
Bosque (Valdivia) , 2006,
Abstract: En la cuenca del río Tutuvén, VII Región de Chile, se estudió el comportamiento del coeficiente de escorrentía instantáneo (C), definido como la relación entre las precipitaciones efectivas y las precipitaciones totales caídas, y la influencia sobre éste de diversas situaciones de vegetación y condiciones precedentes de humedad del suelo. Los coeficientes se determinaron para duraciones de 1, 2 y 4 horas, asociados a tres coberturas de vegetación y a las tres condiciones precedentes de humedad se aladas por el método, para 30 tormentas del periodo 1982-1997. Según los resultados obtenidos, los C mostraron valores mayores para la duración de una hora, y con vegetación escasa y condición de humedad alta. Por el contrario, los valores más bajos fueron para las situaciones con vegetación plena y condiciones secas de humedad del suelo. De todas las situaciones estudiadas, la intensidad de precipitación fue el factor más influyente en la determinación del coeficiente de escorrentía. Por otra parte, se obtuvieron buenas estimaciones de C a partir de las precipitaciones totales en 24 horas, presentando valores de R2 entre 0,84 y 0,97. In Tutuvén river basin, central Chile, instantaneous runoff coefficient (C), defined as the rate between runoff and rainfall, and its influence on different vegetation cover considering previous soil moisture were studied. Coefficients were calculated for intervals of 1, 2 and 4 hours in three different vegetation covers and three different moistures soil conditions, defined by the Curve Number method. 30 storms were used for the period 1982-1997. Results showed that the highest runoff coefficient values were obtained for one hour, with high moisture in soil and thin cover vegetation. On the other hand, the lowest runoff coefficient values were observed in sites of high cover vegetation and dry soils. It is concluded that rainfall intensity is the main factor influencing runoff coefficient values. Good estimates of C were obtained through a regression analysis between daily rainfall amount and C, with a R2 ranging from 0.84 to 0.97.
Preparing for Dengue Vaccine Introduction: Recommendations from the 1st Dengue v2V International Meeting
Joseph Torresi ,Roberto Tapia-Conyer,Harold Margolis
PLOS Neglected Tropical Diseases , 2013, DOI: 10.1371/journal.pntd.0002261
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