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Search Results: 1 - 10 of 213942 matches for " RAúL ERNESTO; "
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La Historia de la Medicina en el Valle del Cauca. El papel de la Escuela de Medicina de la Universidad del Valle, de la parroquia a la globalización
RAúL ERNESTO ASTUDILLO P.
El Hombre y la Máquina , 2003,
Abstract: La Escuela de Medicina de la Universidad del Valle tuvo un papel fundamental en la introducción de grandes cambios en la educación médica no sólo en Colombia, también en el resto de Latinoamérica. Su nacimiento y desarrollo en la ciudad de Cali, en el suroccidente colombiano, están muy asociados con la historia de la región. En este documento analizamos la relación que existió entre la creación de la Escuela de Medicina y los cambios en la vida social y económica del Valle del Cauca y la transformación urbana de la ciudad de Cali, que en el transcurso de los primeros cincuenta a os del siglo XX se convirtió de ser una peque a aldea a la urbe que es hoy. También se mira cómo han transcurrido sus cincuenta a os de vida, pasando por las crisis que han sacudido la educación superior y los servicios de salud en Colombia. Los cambios en el proyecto inicial finalizan en la actual etapa, cuando se están haciendo los primeros balances de los resultados de las nuevas políticas introducidas en la economía y organización político - administrativa del país a comienzos de la década de 1990.
Mortality in immatures of the floodwater mosquito Ochlerotatus albifasciatus (Diptera: Culicidae) and effects of parasitism by Strelkovimermis spiculatus (Nematoda: Mermithidae) in Buenos Aires Province, Argentina
Ernesto Campos, Raúl;Sy, Victoria Elena;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000200006
Abstract: life tables were constructed for six cohorts of immature stages of the floodwater mosquito ochlerotatus albifasciatus (macquart) in a park in buenos aires, highlighting the mortality attributable to the parasitic nematode, strelkovimermis spiculatus poinar & camino. two cohorts were selected to compare parasite incidence in all mosquito stages when low and high parasitism occurred. development time of oc. albifasciatus from first instar to adult was 7.7-10 days in the spring, 6 days in the summer, and 10.9-21.9 days in the fall. survival was estimated as 0-1.4% in the spring, 2% in the summer and 0.2-4.4% in the fall. the highest "k" value (killing power) occurred during a fall cohort when prevalence of the parasite was 86.9%, and the lowest in a spring cohort. parasitism occurred during all seasons, but s. spiculatus persisted to adult only in the summer and fall, when adult mosquitoes developed from parasitized third and fourth instars larvae. the abundance of s. spiculatus differed between old and young larvae only when parasite prevalence was the highest. although pupae and adults of oc. albifasciatus were parasitized, no pupal mortality attributable to parasitism was recorded. the proportion of parasitized adults ranged from 14.2% and 5.7% in the two cohorts compared. pupal wet weight and adult wing lengths did not differ between parasitized and unparasitized individuals.
Variation in the hatching response of Ochlerotatus albifasciatus egg batches (Diptera: Culicidae) in temperate Argentina
Campos, Raúl Ernesto;Sy, Victoria Elena;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000100009
Abstract: egg hatching of winter-collected ochlerotatus albifasciatus was studied for six months. batches of eggs were divided into two groups, one of them was stored in the laboratory at 23°c and 12:12 photoperiod, and the other in the field under dead leaves. every month, from july to december, eggs from the two groups were flooded under both laboratory and field conditions. unhatched eggs were returned to the original condition and flooded two more times separated by ten-day intervals. results show that egg diapause is expressed in different intensities, not only on eggs exposed to different conditions but also in those exposed to the same condition, even when they were laid by the same female. successive inundations yielded incomplete hatches of eggs, and favored the hatching response in the next flooding. low environmental temperatures before and during the flooding depressed hatching response. this shows that eggs need a warm period before flooding as well as warm temperatures during flooding, to hatch. as drought period was longer hatching response increased, but this was also accompanied by warmer environmental conditions. the experiment performed in laboratory did not show that increment. field studies showed that a layer of dead leaves protected eggs from extreme temperatures.
Heridas abiertas. A propósito del temor al resurgimiento del terrorismo y las respuestas reflexivas y reparadoras de la sociedad
Luis Ernesto Fodale,Raúl Valdéz
Summa Humanitatis , 2011,
Abstract: Se discuten los efectos del miedo en un nivel social, como impedimento para elaborar elpasado común, integrar el presente con la historia y resolver diferencias sobre la base del diálogo y el respeto por otras perspectivas. Breves referencias al surgimiento y forma de funcionamiento del grupo terrorista Sendero Luminoso, la correspondiente respuestacontrasubversiva del Estado e incidentes relacionados con el posible resurgimiento de dicho grupo en la Universidad Nacional Mayor de San Marcos (Lima) en pleno proceso electoral, son considerados para reflexionar acerca de cómo la Universidad, como espacio de elaboración colectiva del pasado e institución con aspiraciones democráticas, encuentra dificultades si la violencia ha afectado también las formas de relación de los actores sociales. Así, se encuentran respuestas que parten de la polarización ante la angustia, vinculada con las secuelas psicosociales de la violencia.
Mortality in immatures of the floodwater mosquito Ochlerotatus albifasciatus (Diptera: Culicidae) and effects of parasitism by Strelkovimermis spiculatus (Nematoda: Mermithidae) in Buenos Aires Province, Argentina
Ernesto Campos Raúl,Sy Victoria Elena
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: Life tables were constructed for six cohorts of immature stages of the floodwater mosquito Ochlerotatus albifasciatus (Macquart) in a park in Buenos Aires, highlighting the mortality attributable to the parasitic nematode, Strelkovimermis spiculatus Poinar & Camino. Two cohorts were selected to compare parasite incidence in all mosquito stages when low and high parasitism occurred. Development time of Oc. albifasciatus from first instar to adult was 7.7-10 days in the spring, 6 days in the summer, and 10.9-21.9 days in the fall. Survival was estimated as 0-1.4% in the spring, 2% in the summer and 0.2-4.4% in the fall. The highest "K" value (Killing power) occurred during a fall cohort when prevalence of the parasite was 86.9%, and the lowest in a spring cohort. Parasitism occurred during all seasons, but S. spiculatus persisted to adult only in the summer and fall, when adult mosquitoes developed from parasitized third and fourth instars larvae. The abundance of S. spiculatus differed between old and young larvae only when parasite prevalence was the highest. Although pupae and adults of Oc. albifasciatus were parasitized, no pupal mortality attributable to parasitism was recorded. The proportion of parasitized adults ranged from 14.2% and 5.7% in the two cohorts compared. Pupal wet weight and adult wing lengths did not differ between parasitized and unparasitized individuals.
Oviposition activity and seasonal pattern of a population of Aedes (Stegomyia) aegypti (L.) (Diptera: Culicidae) in subtropical Argentina
Micieli, María Victoria;Campos, Raúl Ernesto;
Memórias do Instituto Oswaldo Cruz , 2003, DOI: 10.1590/S0074-02762003000500013
Abstract: monthly oviposition activity and the seasonal density pattern of aedes aegypti were studied using larvitraps and ovitraps during a research carried out by the public health ministry of salta province, in tartagal, aguaray and salvador mazza cities, in subtropical argentina. the a. aegypti population was active in both dry and wet seasons with a peak in march, accordant with the heaviest rainfall. from may to november, the immature population level remained low, but increased in december. ae. aegypti oviposition activity increased during the fall and summer, when the relative humidity was 60% or higher. eggs were found in large numbers of ovitraps during all seasons but few eggs were observed in each one during winter. the occurrence and the number of eggs laid were variable when both seasons and cities were compared. the reduction of the population during the winter months was related to the low in the relative humidity of the atmosphere. significant differences were detected between oviposition occurrences in tartagal and aguaray and salvador mazza cities, but no differences in the number of eggs were observed. two factors characterize the seasonal distribution pattern of ae. aegypti in subtropical argentina, the absence of a break during winter and an oviposition activity concomitant of the high relative humidity of the atmosphere.
Crisis del centralismo y nuevos retos para las entidades territoriales: una mirada desde Colombia
RESTREPO,DARíO I.; CáRDENAS,RAúL ERNESTO;
Cuadernos del Cendes , 2004,
Abstract: this paper explains how the relationships between decentralisation, economic globalization and privatization processes have changed the interaction and the responsibilities of several government levels, by analyzing the case of colombia. this influence can be observed in developing issues, supply of services and the political system. the paper explores the tension that arises between central, departmental and local governments about making decisions of public policies in different fields: political decentralization, fiscal issues, public funds spending, and developing and security policies
Oviposition activity and seasonal pattern of a population of Aedes (Stegomyia) aegypti (L.) (Diptera: Culicidae) in subtropical Argentina
Micieli María Victoria,Campos Raúl Ernesto
Memórias do Instituto Oswaldo Cruz , 2003,
Abstract: Monthly oviposition activity and the seasonal density pattern of Aedes aegypti were studied using larvitraps and ovitraps during a research carried out by the Public Health Ministry of Salta Province, in Tartagal, Aguaray and Salvador Mazza cities, in subtropical Argentina. The A. aegypti population was active in both dry and wet seasons with a peak in March, accordant with the heaviest rainfall. From May to November, the immature population level remained low, but increased in December. Ae. aegypti oviposition activity increased during the fall and summer, when the relative humidity was 60% or higher. Eggs were found in large numbers of ovitraps during all seasons but few eggs were observed in each one during winter. The occurrence and the number of eggs laid were variable when both seasons and cities were compared. The reduction of the population during the winter months was related to the low in the relative humidity of the atmosphere. Significant differences were detected between oviposition occurrences in Tartagal and Aguaray and Salvador Mazza cities, but no differences in the number of eggs were observed. Two factors characterize the seasonal distribution pattern of Ae. aegypti in subtropical Argentina, the absence of a break during winter and an oviposition activity concomitant of the high relative humidity of the atmosphere.
Crisis del centralismo y nuevos retos para las entidades territoriales: una mirada desde Colombia
DARíO I. RESTREPO,RAúL ERNESTO CáRDENAS
Cuadernos del Cendes , 2004,
Abstract: Este artículo explica, desde el caso colombiano, cómo las relaciones entre descentralización, globalización económica y el proceso de privatización de los activos estatales han cambiado la interacción y las responsabilidades entre los diferentes niveles de gobierno. Este hecho es observado a partir de las políticas de desarrollo, la oferta de servicios y el sistema político. Igualmente explora la tensión que surge entre los diferentes niveles de gobierno acerca de la toma de decisiones de políticas públicas en diferentes áreas: descentralización política, cuestiones fiscales, gasto de los fondos públicos y políticas de desarrollo y seguridad. This paper explains how the relationships between decentralisation, economic globalization and privatization processes have changed the interaction and the responsibilities of several government levels, by analyzing the case of Colombia. This influence can be observed in developing issues, supply of services and the political system. The paper explores the tension that arises between central, departmental and local governments about making decisions of public policies in different fields: political decentralization, fiscal issues, public funds spending, and developing and security policies
Estudio Experimental para la Predicción del Funcionamiento de Evaporadores
Rubio,Luis A; Chernikoff,Raúl E; Mu?oz,Ernesto; Sini,Sergio A;
Información tecnológica , 2007, DOI: 10.4067/S0718-07642007000200013
Abstract: in this work, an industrial scale evaporator with one tube, that can be assembled in six different ways, was designed and constructed. a model based on the identification and reduction of variables was developed and an experimental evaluation was made by operating the evaporator in a climbing forced circulation. the data were related applying the global model and a simple predicting equation as function of independent macroscopic variables was obtained. further research should include reconciliation of the equation obtained for the global model with those to be obtained by the application of the local model.
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