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Sample records for interrelaciones entre veinte

  1. "Entre libre" dans la classe ("Entre Libre" in the Classroom).

    ERIC Educational Resources Information Center

    Compte, Carmen

    1987-01-01

    In an interview, two teachers describe and discuss their different classroom use of the same set of instructional materials for "Entre Libre" and compare the results. Activities include role playing, music, and reporting. (MSE)

  2. "Veinte poemas de amor y Canto general," Pablo Neruda. Performance Guides to Spanish Texts.

    ERIC Educational Resources Information Center

    Gies, David Thatcher, Comp.

    This performance guide is the result of work conducted at the University of Virginia's National Endowment for the Humanities Summer Institute, 1989, on "Spanish Literature in Performance," in which 25 secondary school Spanish teachers studied Spanish texts from the perspective of classroom performance to deepen knowledge of the texts and discover…

  3. La problematica de la demarcacion entre ciencia y pseudociencia y sus implicaciones en la educacion cientifica

    NASA Astrophysics Data System (ADS)

    Jimenez Tolentino, Dinorah

    2011-12-01

    En la sociedad prevalece una tendencia generalizada hacia la inclusion de creencias y practicas pseudocientificas. Esta investigacion responde a la necesidad de analizar como la proliferacion de las pseudociencias afecta la vision que tienen los estudiantes universitarios sobre las ciencias naturales. A tales efectos, la investigadora describe las concepciones epistemologicas que tienen los estudiantes sobre las ciencias y las pseudociencias e identifica los criterios de demarcacion, entre un area y otra, que se derivan de estas concepciones. De igual modo, esta identifica las creencias y practicas pseudocientificas de mayor arraigo entre los estudiantes, destacando, a su vez, la razon de ser de las mismas. Por ultimo, la investigadora analiza las implicaciones educativas de la problematica de la demarcacion entre ciencia y pseudociencia. La investigacion es de naturaleza mixta, enmarcada en los paradigmas empirico- analitico y cualitativo. El proceso investigativo se llevo a cabo mediante la administracion del cuestionario Criterios para la demarcacion entre ciencia y pseudociencia. La parte cualitativa estuvo enmarcada en el diseno de estudio de caso, recopilando informacion mediante entrevistas semiestructuradas en dos grupos focales. La poblacion de estudio estuvo constituida por estudiantes universitarios del nivel subgraduado de la Universidad Central de Bayamon. Los resultados del estudio reflejaron las concepciones erroneas de los estudiantes sobre la naturaleza de las ciencias y las pseudociencias. Con respecto a la demarcacion entre ciencia y pseudociencia, el criterio imperante entre los universitarios es el de la verificabilidad, considerando la aplicacion del metodo cientifico como el metodo para demostrar la veracidad de las teorias cientificas. Las creencias y practicas pseudocientificas no son muy frecuentes entre los universitarios. Estos atribuyen las mismas a la prevalencia de elementos supersticiosos y al engano a que es sometida la poblacion

  4. Entre Dos Mundos/Between Two Worlds: Youth Violence Prevention for Acculturating Latino Families

    ERIC Educational Resources Information Center

    Smokowski, Paul R.; Bacallao, Martica

    2009-01-01

    Objective: This study evaluated the efficacy of Entre Dos Mundos/Between Two Worlds (EDM) prevention for Latino adolescents. Method: In an experimental trial to compare implementation formats, 41 Latino families were randomly assigned to EDM action-oriented skills training groups, and 47 families were randomly assigned to unstructured EDM support…

  5. ESTIGMA Y VIH/SIDA ENTRE PADRES/MADRES Y ADOLESCENTES PUERTORRIQUEÑOS/AS

    PubMed Central

    Pérez, Grace Rosado; Reyes, Glendalys Rivera; Villanueva, Victoria Larrieux; Torres, Gilliam J. Torres; Díaz, Elba Betancourt; Varas-Díaz, Nelson; Villaruel, Antonia

    2016-01-01

    La comunicación entre padres/madres y adolescentes sobre el tema de la sexualidad es importante para el desarrollo de la salud de personas jóvenes. Dicha comunicación puede verse negativamente impactada por actitudes estigmatizantes hacia el tema del VIH/SIDA. El objetivo de este estudio fue identificar actitudes estigmatizantes hacia el VIH/SIDA entre padres/madres y adolescentes puertorriqueños/as. Este esfuerzo es parte del Proyecto Cuídalos, dirigido a probar una intervención en formato electrónico que busca aumentar la comunicación sobre sexualidad y salud entre padres/madres y adolescentes mediante un diseño experimental con 458 diadas de padres/madres y adolescentes de 13 a 17 años. Para propósitos de este artículo reportamos estadísticas descriptivas sobre estigma hacia el VIH/SIDA con la información recopilada en la medición basal. Tanto adultos/as como adolescentes mostraron actitudes estigmatizantes hacia el VIH/SIDA. A la luz de los resultados es necesario continuar desarrollando intervenciones para la reducción de estigma en esta población. Los/as padres/madres pueden ser un recurso invaluable para reducir el estigma en los/as jóvenes, y prevenir conductas sexuales de riesgo e infecciones. PMID:27099649

  6. Estudo comparativo entre estrelas centrais de nebulosas planetárias deficientes em hidrogênio

    NASA Astrophysics Data System (ADS)

    Marcolino, W. L. F.; de Araújo, F. X.

    2003-08-01

    Apresentamos neste trabalho o resultado de um estudo das principais características espectrais das estrelas centrais de nebulosas planetárias (ECNP) deficientes em hidrogênio. A origem e a evolução dessas estrelas ainda constitui um problema em aberto na evolução estelar. Geralmente esses objetos são divididos em [WCE], [WCL] e [WELS]. Os tipos [WCE] e [WCL] apresentam um espectro típico de uma estrela Wolf-Rayet carbonada de população I e as [WELS] apresentam linhas fracas de carbono e oxigênio em emissão. Existem evidências que apontam a seguinte sequência evolutiva : [WCL] = > [WCE] = > [WELS] = > PG 1159 (pré anã-branca). No entanto, tal cenário apresenta falhas como por exemplo a falta de ECNP entre os tipos [WCL] e [WCE]. Baseados em uma amostra de 24 objetos obtida no telescópio de 1.52m em La Silla, Chile (acordo ESO/ON), ao longo do ano 2000, apresentamos os resultados da comparação das larguras equivalentes de diversas linhas relevantes entre os tipos [WCL], [WCE] e [WELS]. Verificamos que nossos dados estão de acordo com a sequência evolutiva. Baseado nas linhas de C IV, conseguimos dividir pela primeira vez as [WELS] em dois grupos principais. Além disso, os dados reforçam a afirmação de que as [WCE] são as estrelas que possuem a maior temperatura entre as ECNP deficientes em hidrogênio. Discutimos ainda, a escassez de dados disponíveis na literatura e a necessidade da obtenção de parametros físicos para estes objetos.

  7. Etude des relations entre photosynthese respiration, transpiration et nutrition minerale chez le ble

    NASA Astrophysics Data System (ADS)

    André, M.; Ducloux, H.; Richaud, C.; Massimino, D.; Daguenet, A.; Massimino, J.; Gerbaud, A.

    La croissance du Blé Triticum aestivum a été étudiée en environnement contrôlé et fermé pendant une période de 70 jours. Les échanges gazeux (Photosynthèse, Respiration) hydriques (Transpiration) et la consommation en éléments minéraux (Azote, Phosphore, Potassium) ont été mesurés en continu. On présentera les relations dynamiques observées entre les différentes fonctions physiologiques, d'une part sous l'influence de la croissance et d'autre part en réponse à des modifications de l'environnement. L'influence de la teneur en CO2 pendant la croissance (teneur normale ou doublée) sera mise en évidence.

  8. No Financial Disincentive for Choosing More Healthful Entrées on Children’s Menus in Full-Service Restaurants

    PubMed Central

    West, Delia

    2013-01-01

    Children are eating restaurant foods more than ever before, and price is among the top considerations for food choices. We categorized and enumerated entrées on children’s menus from 75 full-service restaurant chains to compare prices of more healthful and less healthful entrées to test the assumption that more healthful food is more expensive. The mean (standard deviation) price of more healthful entrées ($5.38 [$2.01]) was not significantly different from the price of less healthful entrées ($5.27 [$2.04]). In contrast to research demonstrating that more healthful foods tend to be more expensive in grocery stores, more healthful entrées on children’s menus in restaurants were not more expensive than less healthful entrées. PMID:23742942

  9. An Environmental Management Model of Thermal Waters in Entre Ríos Province, Argentina

    NASA Astrophysics Data System (ADS)

    Pablo, Mársico Daniel; Luís, Díaz Eduardo; Ivana, Zecca; Oscar, Dallacosta; Antonio, Paz-González

    2015-04-01

    Deep exploratory drillings, i.e. those with more than 500 meters depth, have been performed in the Entre Ríos province, Argentina, in order to ascertain the presence of thermal water. Drilling began in 1994, and until now there have been 18 polls with very variable results in terms of mineralization, resource flow, and temperature. The aim of this study was to present a management model, which should allow operators of thermal complexes to further develop procedures for safeguarding the biodiversity of the ecosystems involved, both during exploration and exploitation activities. The environmental management Plan proposed is constituted by a set of technical procedures that are formulated and should be performed during the stages of exploration and exploitation of the resource, and consists of: environmental monitoring, environmental audit, public information and contingency programs. This Plan describes the measures and proposals aimed at protecting environmental quality in the area of influence of a thermal complex project, ensuring that its execution remains environmentally responsibly, and allowing implementation of specific actions to prevent or correct environmental impacts, as predicted in the evaluation of the Environmental Program. The audit of environmental impact includes and takes into account natural factors, such as water, soil, atmosphere, flora and fauna, and also cultural factors. The technical audit Plan was prepared in order to get a systematic structure and organization of the verification process, and also with regard to document the degree of implementation of the proposed mitigation measures. Finally, an environmental contingency program was implemented, and its objective was to consider the safeguarding of life and its natural environment. Thus, a guide has been developed with the main actions to be taken on a contingency, since forecast increases the efficiency of the response. The methodology developed here was adopted as the procedure

  10. Religiosidade, juventude e sexualidade: entre a autonomia e a rigidez1

    PubMed Central

    Silva, Cristiane Gonçalves da; Santos, Alessandro Oliveira; Licciardi, Daniele Carli; Paiva, Vera; Parker, Richard

    2009-01-01

    Esse artigo descreve como jovens religiosos e autoridades religiosas de sua comunidade compreendem a sexualidade, considerando suas experiências pessoais e como membros de comunidades religiosas. A análise pretende contribuir para que políticas públicas dedicadas à promoção da saúde sexual da juventude considerem a religiosidade, no contexto de um estado laico e da promoção do direito à prevenção. Foram realizadas 26 entrevistas abertas e semidirigidas em diferentes comunidades da região metropolitana da cidade de São Paulo (comunidades católicas, da umbanda, do candomblé e de diferentes denominações evangélicas) sobre iniciação sexual, casamento, gravidez, contracepção e prevenção das DST/Aids, homossexualidade, aborto e direitos humanos. Observou-se como jovens e autoridades religiosas convivem com a tensão entre tradição e modernidade e os distintos discursos sobre a sexualidade. Como sujeitos religiosos (do discurso religioso) e sujeitos sexuais (de discursos sobre sexualidade), devem ser incorporados pelos programas como sujeitos de direito nos termos de sua religiosidade. PMID:21886456

  11. Occurrence of alternariol and alternariol monomethyl ether in beverages from the Entre Rios Province market, Argentina.

    PubMed

    Broggi, Leticia; Reynoso, Cora; Resnik, Silvia; Martinez, Fernanda; Drunday, Vanesa; Bernal, Angela Romero

    2013-02-01

    One hundred and eighty five samples of red, white and rosé wines and different juices purchased in Entre Rios, Argentina, were analyzed for the Alternaria mycotoxins alternariol (AOH) and alternariol methyl ether (AME). White wines were analyzed after removal of alcohol by a nitrogen stream and concentrated. AOH in red wines was cleaned up by solid-phase extraction columns in series (octadecyl and amino propyl modified silica) and AME quantified directly on the sample. The juices were filtered and concentrated, and then all sample extracts were quantified by high performance liquid chromatography with photodiode array detector that allows confirmation through UV spectra. Method validation revealed a good sensitivity with adequate LOD and LOQ for AME and less sensitivity for AOH (i.e. white wine: AME 0.8 and 1.4 ng/mL, AOH 2 and 3.3 ng/mL; red wine: AME 0.1 and 0.2 ng/mL, AOH 4.5 and 7.5 ng/mL; apple juice: AME 1.7 and 2.8 ng/mL, AOH 5 and 9 ng/mL; other juices: AME 2.0 and 3.1 ng/mL, AOH 6 and 10 ng/mL). Recoveries in all cases were greater than 80 %. Four of 53 white wine samples were contaminated with AOH with a maximum level of 18 ng/mL, 6 of 56 samples of red wine had a maximum of 13 ng/mL, and 3 of 68 samples of juices had traces of AOH. AME was less frequently detected than AOH, and the LOD and LOQ for AME are smaller than for AOH. Only three samples of white wine and one of red wine were contaminated, but in only one white wine sample (AME 225 ng/mL) did the toxin level exceed the LOQ. PMID:23334721

  12. Analyse des interactions energetiques entre un arena et son systeme de refrigeration

    NASA Astrophysics Data System (ADS)

    Seghouani, Lotfi

    La presente these s'inscrit dans le cadre d'un projet strategique sur les arenas finance par le CRSNG (Conseil de Recherche en Sciences Naturelles et en Genie du Canada) qui a pour but principal le developpement d'un outil numerique capable d'estimer et d'optimiser la consommation d'energie dans les arenas et curlings. Notre travail s'inscrit comme une suite a un travail deja realise par DAOUD et coll. (2006, 2007) qui a developpe un modele 3D (AIM) en regime transitoire de l'arena Camilien Houde a Montreal et qui calcule les flux de chaleur a travers l'enveloppe du batiment ainsi que les distributions de temperatures et d'humidite durant une annee meteorologique typique. En particulier, il calcule les flux de chaleur a travers la couche de glace dus a la convection, la radiation et la condensation. Dans un premier temps nous avons developpe un modele de la structure sous la glace (BIM) qui tient compte de sa geometrie 3D, des differentes couches, de l'effet transitoire, des gains de chaleur du sol en dessous et autour de l'arena etudie ainsi que de la temperature d'entree de la saumure dans la dalle de beton. Par la suite le BIM a ete couple le AIM. Dans la deuxieme etape, nous avons developpe un modele du systeme de refrigeration (REFSYS) en regime quasi-permanent pour l'arena etudie sur la base d'une combinaison de relations thermodynamiques, de correlations de transfert de chaleur et de relations elaborees a partir de donnees disponibles dans le catalogue du manufacturier. Enfin le couplage final entre l'AIM +BIM et le REFSYS a ete effectue sous l'interface du logiciel TRNSYS. Plusieurs etudes parametriques on ete entreprises pour evaluer les effets du climat, de la temperature de la saumure, de l'epaisseur de la glace, etc. sur la consommation energetique de l'arena. Aussi, quelques strategies pour diminuer cette consommation ont ete etudiees. Le considerable potentiel de recuperation de chaleur au niveau des condenseurs qui peut reduire l'energie requise par

  13. Seroprevalence of Salmonella and Mycoplasma infection in backyard chickens in the state of Entre Rios in Argentina.

    PubMed

    Xavier, J; Pascal, D; Crespo, E; Schell, H L; Trinidad, J A; Bueno, D J

    2011-04-01

    The present work was conducted to study the seroprevalence of Salmonella, Mycoplasma gallisepticum (MG), and Mycoplasma synoviae (MS) infection in backyard chickens located in Entre Ríos, Argentina, over 3 periods of time. A total of 2,441 sera samples were collected from backyard chickens belonging to 256 family farms in 16 counties in the state of Entre Ríos from January to May 2003 (first period), December 2004 to April 2005 (second period), and October 2006 to May 2007 (third period). The prevalence of family farms testing seropositive for Salmonella averaged 23.9, 15.9, and 28.6% during the first, second, and third period, respectively. The highest prevalence of Salmonella-seropositive farms recorded (66.7%) was on farms from Concordia county, and the lowest prevalence (0%) was on farms from La Paz county. In contrast, the prevalence of family farms seropositive for MG averaged 32.8, 55.1, and 76.2% during the first, second, and third periods, respectively. The highest prevalence of MG-seropositive farms (100%) was found in the counties of Victoria and Tala, and the lowest prevalence (8.7%) was found on farms on Colón county. The prevalence of family farms seropositive for MS averaged 68.6 and 100% during the first and second periods, respectively. The highest prevalence of MS-seropositive farms (100%) was on farms in 85% of the counties tested, and the lowest prevalence (21.7%) was on farms from Colón county. Salmonella, MG, and MS infection are present at high levels in backyard chicken farms, and this presents a high risk to commercial poultry production in Entre Ríos, the state with the highest chicken population and density in Argentina. PMID:21406358

  14. Clostridium perfringens growth from spore inocula in sous-vide processed pork-based Mexican entrée.

    PubMed

    Miguel-Garcia, Denise Y; Juneja, Vijay K; Valenzuela-Melendrez, Martin; Díaz-Cinco, Martha E; Thippareddi, H; Aida Peña-Ramos, E

    2009-01-01

    The combined effect of Citricidal wih irradiation on Clostridium perfringens growth from spores in a sous-vide processed marinated pork meat Mexican entrée was investigated. Citricidal was added at 200 or 800 ppm after mixing pork meat with tomatillo sauce and inoculated with 3 log(10) CFU/g of C. perfringens spores. Samples were irradiated at either 0 or 2 kGy, heated to an internal temperature of 71 degrees C, and stored at 4 degrees C for 28 d, 15 degrees C for 45 d, and 25 degrees C for 26 h. To simulate the conditions that may occur during transportation, distribution, storage, or handling in supermarkets or by consumers, the effect of static temperature abuse on C. perfringens growth was assessed by transferring samples stored at 4 to 25 degrees C for 13 and 15 h. Total C. perfringens populations were determined by plating diluted samples on tryptose-sulfite-cycloserine agar. Growth was not observed up to 45 d of storage at 15 degrees C in samples supplemented with 800 ppm of Citricidal. At 25 degrees C, no significant differences (P > 0.05) on the lag phase duration due to antimicrobial treatments was observed. The temperature abuse of refrigerated products for up to 15 h did not lead to C. perfringens growth to high infective dose levels of 1 million cells required to cause food poisoning. The results suggest that 800 ppm Citricidal can have significant bacteriostatic activity against C. perfringens and may provide a degree of protection against this pathogen in sous-vide processed marinated pork meat Mexican entrée, under mild temperature abuse (

  15. Effect of grapefruit seed extract on thermal inactivation of Listeria monocytogenes during sous-vide processing of two marinated Mexican meat entrées

    Technology Transfer Automated Retrieval System (TEKTRAN)

    D and z values of Listeria monocytogenes were obtained for two Mexican meat entrées: pork meat marinated in tomatillo (green tomato) sauce (PTS) and beef marinated in a red chili sauce (BRCS), with addition of 0, 200 and 800 ppm of grapefruit seed extract (GSE). Meat samples, inoculated with L.monoc...

  16. A Process Evaluation of an Efficacious Family-Based Intervention to Promote Healthy Eating: The "Entre Familia: Reflejos de Salud" Study

    ERIC Educational Resources Information Center

    Schmied, Emily; Parada, Humberto; Horton, Lucy; Ibarra, Leticia; Ayala, Guadalupe

    2015-01-01

    "Entre Familia: Reflejos de Salud" was a successful family-based randomized controlled trial designed to improve dietary behaviors and intake among U.S. Latino families, specifically fruit and vegetable intake. The novel intervention design merged a community health worker ("promotora") model with an entertainment-education…

  17. Soil Quality Indicators to Define Land Use in the Area of Native Forest of Entre Ríos, Argentina

    NASA Astrophysics Data System (ADS)

    Wilson, M. G.; Tasi, H. A.; Paz González, A.; Díaz, E. L.; Sasal, M. C.

    2012-04-01

    The main economic activity in the area of native forest of the province of Entre Ríos (Argentina) has long been the agricultural and/or livestock production, especially cattle breeding. In recent years, the proportion of agricultural crops in the rotations, especially that of soybean, has increased, thus leading to an increase in the need for land clearing to incorporate new lands for agricultural use. Most of these lands are considered marginal for agricultural use. In addition rice farming with irrigation is a critical part of the Entre Ríos economy. Defining and assessing soil quality indicators (SQI) that show the evolution of the soil with different uses and management systems is a way to contribute to the knowledge of soil quality. The aims of this study were to characterize the current land use and land tenure in the area of native forest of Entre Ríos, as well as to identify and select variables sensitive to agricultural and/or livestock use of the most representative soils of this area (indicators of the dynamic quality of the soil) and define the most appropriate land use according to land suitability and behavior of these indicators. We identified the most representative soil subgroups (corresponding to the orders Vertisols, Mollisols and Alfisols) and defined the production systems livestock-agricultural, agricultural-livestock, agricultural without irrigation, and rice crop irrigated with water from groundwater and surface reservoirs. We also determined the physical, physico-chemical, chemical and microbiological variables of the soil, and characterized the quality of the water for irrigation. We selected the SQI using Principal Components Analysis, to form a minimum data set (MDS). The change in the use of the land responded to a favorable economic situation for agriculture that started in the 1990's. The leasing and sharecropping schemes and the incidental contracts have become increasingly important, predominating over the undivided property. We

  18. State of Conservation of the Native Forests in Entre Ríos (Argentina) and Changes in Land Use

    NASA Astrophysics Data System (ADS)

    Sabattini, R. A.; Sione, S. M.; Ledesma, S. G.; Sabattini, J. A.; Wilson, M. G.

    2012-04-01

    The native forest area of Entre Ríos province (Argentina) is associated with a constant change in land use, with an increase in recent years in agricultural use, especially for soybean crop. In addition, since its inadequate management has triggered degradation processes of the natural forest structure, the implementation of strategies for the restoration and conservation of native forests has become a priority. The aim of this study was to diagnose the conservation state of the native forest in the basin of the Estacas Stream (Entre Ríos, Argentina) after the change in land use, to help design guidelines for the restoration and sustainable management of these ecosystems. The field study was conducted in October 2010, in a representative area of the native forest of 73,000 ha. Using Landsat 5-TM images (INPE), environments were separated by manual vectorization, identifying and classifying native forests and other lands (agricultural, urban). Using a field exploratory survey (58 geo-referenced sampling points), we developed patterns corresponding to the different types of forests, contrasting this information with the digital data of the images. The native forests were classified according to type (high/low forest, open/closed forest, savanna), successional stage (climax, successional or regeneration forest) and degree of disturbance (weed growth, erosion, fire), and their frequency determined. Each classification was assessed by a contingency matrix, and global reliability index and the Kappa index. The information obtained generated a classification map of native forests in the basin scale. We found that the native forest covered an area of 42,726.91 ha, accounting for 58.52% of the total basin area, and that the rest corresponded to other land uses. The most frequent native forests (59.09%) were climax forest, but accounted for only 8.2% of the basin area. Within this group, the most important were the low and open forest, with Prosopis affinis and Prosopis

  19. On acoplamento mecânico entre a antena e o transdutor no detector de ondas gravitacionais Mario Schenberg

    NASA Astrophysics Data System (ADS)

    Melo, J. L.; Aguiar, O. D.; Velloso, W. F., Jr.; Lucena, A. U.

    2003-08-01

    O detector de ondas gravitacionais MARIO SCHENBERG consistirá de uma massa esférica de cobre-alumínio de 1150kg resfriada a 4K, sobre a qual serão instalados 6 transdutores de nióbio. Com estes trandutores pretende-se converter um possível sinal de onda gravitacional detectado em sinal elétrico, para tanto é necessário que o acoplamento mecânico entre os transdutores e a massa ressonante seja o maior possível. Isto significa que o transdutor deve ser ressonante na mesma freqüência que a antena (aproximadamente 3200Hz). Neste trabalho foi desenvolvida uma geometria para a estrutura mecânica do trandutor. Isto foi feito criando-se modelos em elementos finitos usando-se o "software" MSC/Nastran. Estes modelos criados foram analisados estaticamente (cálculo de tensões) e dinamicamente (cálculo das freqüências de ressonâncias e seus respectivos modos normais) de maneira a se obter o primeiro modo normal do transdutor em 3200Hz. A partir destes cálculos escolheu-se a melhor geometria para o transdutor. Os próximos passos do trabalho serão: usinar este transdutor em uma barra de nióbio e testá-lo à temperatura ambiente e à baixa temperatura. Após isto, pretende-se testá-lo na própria antena resfriada.

  20. Half-size me? How calorie and price information influence ordering on restaurant menus with both half and full entrée portion sizes.

    PubMed

    Haws, Kelly L; Liu, Peggy J

    2016-02-01

    Many restaurants are increasingly required to display calorie information on their menus. We present a study examining how consumers' food choices are affected by the presence of calorie information on restaurant menus. However, unlike prior research on this topic, we focus on the effect of calorie information on food choices made from a menu that contains both full size portions and half size portions of entrées. This different focus is important because many restaurants increasingly provide more than one portion size option per entrée. Additionally, we examine whether the impact of calorie information differs depending on whether full portions are cheaper per unit than half portions (non-linear pricing) or whether they have a similar per unit price (linear pricing). We find that when linear pricing is used, calorie information leads people to order fewer calories. This decrease occurs as people switch from unhealthy full sized portions to healthy full sized portions, not to unhealthy half sized portions. In contrast, when non-linear pricing is used, calorie information has no impact on calories selected. Considering the impact of calorie information on consumers' choices from menus with more than one entrée portion size option is increasingly important given restaurant and legislative trends, and the present research demonstrates that calorie information and pricing scheme may interact to affect choices from such menus. PMID:26654889

  1. Cristallisation, syncristallisation, et alliages moléculaires entre le lorazépam et l'oxazépam

    NASA Astrophysics Data System (ADS)

    Mascherpa-Corral, D.; Mascherpa, G.; Chauvet, A.

    1993-04-01

    Le polymorphisme et pseudopolymorphisme du lorazépam et oxazépam ont été étudiés par analyse thermique, calorimétrie différentielle à balayage et diffraction de rayons X. Deux formes polymorphes du lorazépam et plusieurs mono et hemisolvates ont été isolés à partir de recristallisation dans divers soivants. Aucun polymorphisme ni solvate n'a été mis en évidence avec l'oxazépam. Les paramètres cristallographiques des phases isolées ont été déterminées. A 160 et 203°C, le lorazépam et l'oxazépam perdent respectivement une molécule d'eau pour donner après réarrangement la quinazolinecarboxaldéhyde correspondante. La syncristallisation des deux benzodiazépines dans le benzène conduit à des alliages moléculaires à miscibilité totale à l'état solide dans tout le domaine de concentration entre l'exazépam el la forme α du lorazépam, elle n'est que partielle avec la forme β. Thermal analysis, differential scanning calorimetry, and X-ray diffraction were carried out to study the polymorphism and pseudopolymorphism of lorazepam and oxazepam. Two polymorphic forms of lorazepam and several mono- or hemisolvates were obtained after recrystallization from various solvents. No polymorphic form or solvate has been found for oxazepam. The crystallographic parameters of these new phases were determined. Lorazepam and oxazepam can lose a molecule of water at 160 and 203°C, respectively, and rearrange to quinazolinecarboxaldehyde. Mixed crystals of the two benzodiazepines, after recrystallization from benzene, lead to molecular alloys with complete solid solubility between oxazepam and the α-form of lorazepam over the whole range of composition but only to partial solubility with the β-form of lorazepam.

  2. Relation entre les caractéristiques des table-bancs et les mesures anthropométriques des écoliers au Benin

    PubMed Central

    Falola, Stève Marjelin; Gouthon, Polycarpe; Falola, Jean-Marie; Fiogbe, Michel Armand; Nigan, Issiako Bio

    2014-01-01

    Introduction Le mobilier scolaire et la posture assise en classe sont souvent impliqués dans l'apparition des douleurs rachidiennes, influant de fait sur la qualité des tâches réalisées par les apprenants. Aucune étude n'a encore vérifié le degré d'adéquation entre les caractéristiques du mobilier et celles des écoliers au Bénin. L'objectif de cette étude transversale est donc de déterminer la relation entre les dimensions des table-bancs utilisées en classe et les mesures anthropométriques des écoliers au Bénin. Methods Elle a été réalisée avec un échantillon probabiliste de 678 écoliers, âgés de 4 à 17 ans. Les mesures anthropométriques des écoliers et les mensurations relatives aux longueurs, largeurs et hauteurs des table-bancs ont été mesurées, puis intégrées aux équations proposées dans la littérature. Les pourcentages des valeurs situées hors des limitesacceptables, dérivées de l'application des équations ont été calculés. Results La largeur et la hauteur des table-bancs utilisées par les écoliers étaient plus élevées (p < 0,05) que les valeurs de référence recommandées par les structures officielles de contrôle et de production des mobiliers scolaires au Bénin. Quel que soit le sexe, il y avait une inadéquation entre la largeur du banc et la longueur fesse-poplité, puis entre la hauteur de la table et la distance coude-bancdes écoliers. Conclusion Les résultats suggèrent de prendre en compte l’évolution des mesures anthropométriques des écoliers dans la confection des table-bancs, afin de promouvoir de bonnes postures assises en classe et de réduire le risque de troubles du rachis. PMID:25317232

  3. Effect of Grapefruit Seed Extract on Thermal Inactivation of Listeria monocytogenes during Sous-Vide Processing of Two Marinated Mexican Meat Entrées.

    PubMed

    Valenzuela-Melendres, Martin; Peña-Ramos, E Aida; Juneja, Vijay K; Camou, Juan Pedro; Cumplido-Barbeitia, German

    2016-07-01

    D- and z-values for Listeria monocytogenes were obtained for two Mexican meat entrées: pork meat marinated in tomatillo (green tomato) sauce (PTS) and beef marinated in a red chili sauce (BRCS), with addition of 0, 200, and 800 ppm of grapefruit seed extract (GSE). Meat samples inoculated with L. monocytogenes were packaged in sterile bags, immersed in a water bath, and held at 55, 57.5, 60, and 62.5°C for different periods of time. Depending upon the temperature, D-values at 0 ppm of GSE ranged from 26.19 to 2.03 min in BRCS and 26.41 to 0.8 min in PTS. Adding 800 ppm of GSE to BRCS thermally treated at 55 and 62.5°C significantly decreased inactivation time by 35%. A reduction in time of 25.9, 10.6, and 40.1% at 55, 57.5, and 60°C, respectively, was observed in PTS with 800 ppm of GSE. The z-values of L. monocytogenes were not significantly affected by GSE addition; average z-values were 7.25 and 5.09°C for BRCS and PTS, respectively. Estimated thermal lethality for a 7-D log reduction of L. monocytogenes under commercial-size sous-vide conditions at a reference temperature of 55°C was reached at 78 and 71 min for BRCS without and with 800 ppm of GSE, respectively. For PTS, 7-D reduction was attained at 69 and 61 min without and with addition of 800 ppm of GSE, respectively. Supplementing both Mexican meat entrées (BRCS and PTS) with 800 ppm of GSE rendered L. monocytogenes cells more sensitive to the lethal effect of heat. The results of this study will assist the retail food industry in designing acceptance limits on critical control points pertaining to cooking regimes to effectively eliminate L. monocytogenes in BRCS and PTS sous-vide processed Mexican meat entrées. PMID:27357037

  4. Uma Comparação entre Técnicas de Propagação de Erros em Astrofísica: Monte Carlo x Bootstrap

    NASA Astrophysics Data System (ADS)

    Zabot, Alexandre; Baptista, Raymundo

    2005-07-01

    Neste trabalho é feito um estudo comparativo entre dois algoritmos numéricos usados para propagação de erros em dados experimentais. Um deles é conhecido por Método de Monte carlo e o outro por Método de Bootstrap. Recentemente, Dhullon & Watson argüiram que a aplicação do método de Monte Carlo introduz ruído nos dados, e propuseram então a utilização do Bootstrap como alternativa capaz de produzir resultados superiores. O objetivo deste trabalho é testar a validade dessa afirmação. As duas técnicas foram aplicadas a três problemas diferentes: o ajsute de modelos de emissão LTE simples e atmosfera estelar a espectros estelares observados e o ajuste de curvas de luz de eclipses de Variáveis Cataclísmicas para a detemrinação da distribuição radial de brilho dos seus discos de acréscimo. Os métodos foram testados quanto à sua robusteza, ou seja, a capacidade de prover resultados coerentes enre si. Além disso, as soluções dos métodos foram comparadas. Os resultados indicam que não existe evidência de superioridade de um métodos em relação ao outro.

  5. A Process Evaluation of an Efficacious Family-Based Intervention to Promote Healthy Eating: The Entre Familia: Reflejos de Salud Study.

    PubMed

    Schmied, Emily; Parada, Humberto; Horton, Lucy; Ibarra, Leticia; Ayala, Guadalupe

    2015-10-01

    Entre Familia: Reflejos de Salud was a successful family-based randomized controlled trial designed to improve dietary behaviors and intake among U.S. Latino families, specifically fruit and vegetable intake. The novel intervention design merged a community health worker (promotora) model with an entertainment-education component. This process evaluation examined intervention implementation and assessed relationships between implementation factors and dietary change. Participants included 180 mothers randomized to an intervention condition. Process evaluation measures were obtained from participant interviews and promotora notes and included fidelity, dose delivered (i.e., minutes of promotora in-person contact with families, number of promotora home visits), and dose received (i.e., participant use of and satisfaction with intervention materials). Outcome variables included changes in vegetable intake and the use of behavioral strategies to increase dietary fiber and decrease dietary fat intake. Participant satisfaction was high, and fidelity was achieved; 87.5% of families received the planned number of promotora home visits. In the multivariable model, satisfaction with intervention materials predicted more frequent use of strategies to increase dietary fiber (p ≤ .01). Trends suggested that keeping families in the prescribed intervention timeline and obtaining support from other social network members through sharing of program materials may improve changes. Study findings elucidate the relationship between specific intervention processes and dietary changes. PMID:25810469

  6. Métastases cutanées vues au laboratoire d'anatomie pathologique à Lomé, Togo entre 2005 et 2014

    PubMed Central

    Darre, Tchin; Saka, Bayaki; Landoh, Dadja Essoya; Mouhari-Toure, Abas; Amegbor, Koffi; Pitché, Palokinam; Napo-Koura, Gado

    2015-01-01

    Introduction L'objectif de cette étude était de documenter le profil épidémiologique et histologique des métastases cutanées vues au laboratoire d'anatomie pathologique (LAP) de Lomé. Méthodes Il s'agissait d'une étude descriptive et transversale portant sur des cas de métastases cutanées observées au LAP du CHU Sylvanus Olympio entre 2005 et 2014. Résultats Au cours de cette période d’étude, nous avons recensé 32 cas de métastases cutanées représentant 3,2% (1005 cas) de l'ensemble des cas de métastases enregistrées au LAP. L’âge moyen des patients atteints de ces métastases cutanées était de 42,6 ans et le sex-ratio (F/H) de 2,2. Sur le plan macroscopique, ces métastases étaient nodulaires dans 15 cas, bourgeonnantes dans 12 cas, ulcéré dans 3 cas et ulcéro-bourgeonnant dans 2 cas. Les types histologiques étaient représentés par les adénocarcinomes (19 cas, 59,4%), les carcinomes épidermoïdes (8 cas, 25%), la maladie de Paget (3 cas, 9,4%), le carcinome à petites cellules du type neuroendocrine (un cas, 3,1%) et le mélanome (un cas, 3,1%). Selon le degré de différenciation, les métastases cutanées étaient bien différenciées dans 14 cas (56%). Les principales localisations de ces métastases cutanées étaient le thorax (11 cas, 34,4%) suivi de l'abdomen (10 cas, 31,3%). Les cancers primitifs étaient surtout d'origine mammaire (14 cas, 43,7%). Conclusion Cette étude montre que les métastases cutanées sont relativement rares et les tumeurs malignes d'origine mammaire sont les tumeurs primitives prédominantes. Avec un pourcentage élevé des formes peu différenciées et celles indifférenciées, l'amélioration du plateau technique du LAP (immunohistochimie) permettra d'accroitre ses capacités diagnostiques. PMID:27047627

  7. A Reappraising of Cosmography: the Interface Between Astronomical and Geographic Studies. (Breton Title: Releitura do Conceito de Cosmografia: a Interface Entre os Estudos Astronômicos e Geográficos.) Una Relectura del Concepto de Cosmografía: la Interfase Entre los Estudios Astronómicos y Geográficos

    NASA Astrophysics Data System (ADS)

    Azevedo Sobreira, Paulo Henrique

    2012-12-01

    The concept of "Cosmography" is in disuse since the 80s of the last century, but the astronomical themes previously discussed in the school subjects of Geography and Cosmography remain in current textbooks. The use of term "Cosmography" was rescued in this research, and the study of its re-signification prompted the appearance of the term Geographic Cosmography. The Geographic Cosmography is a field of studies of the Geography, whose set of knowledge and skills is predominantly scholar. It studies the interface between terrestrial and celestial knowledge, and assigns a geographic significance to them. It examines human and natural relationships with Sidereal Space and its consequences for society and nature. O conceito de "Cosmografia" está em desuso desde os anos 80 do século XX, mas os temas astronômicos anteriormente abordados nas disciplinas escolares de Cosmografia e de Geografia permanecem nos atuais livros didáticos. O uso do termo "Cosmografia" foi resgatado nesta pesquisa e o estudo de sua ressignificação proporcionou o surgimento do termo Cosmografia Geográfica. A Cosmografia Geográfica é um campo de estudos da Geografia, cujo conjunto de conhecimentos e habilidades é predominantemente escolar. Estuda a interface entre os conhecimentos terrestres e os celestes e lhes atribui significância geográfica. Analisa as relações humanas e naturais com o Espaço Sideral e suas consequências para a sociedade e a natureza.

    Aunque el concepto de "Cosmografía" no se usa desde la década de los '80 del siglo pasado, los temas astronómicos que se enseñaban anteriormente en las asignaturas escolares de Cosmografía y de Geografía permanecen en los actuales libros didácticos. El uso del término "Cosmografía" fue rescatado en esta investigación y el estudio de su resignificación proporcionó el surgimiento del término Cosmografía Geográfica. La Cosmografía Geográfica es un campo de estudio de la Geografía, donde

  8. Etude des phenomenes chimiques au contact entre le bloc cathodique et la barre collectrice d'une cellule d'electrolyse d'aluminium

    NASA Astrophysics Data System (ADS)

    Lebeuf, Martin

    La production d'aluminium est une industrie importante au Québec. Les propriétés de ce métal le vouent à de multiples usages présents et futurs dans le cadre d'une économie moderne durable. Toutefois, le procédé Hall-Héroult est très énergivore et des progrès demeurent donc nécessaires pour en diminuer les coûts financiers et environnementaux. Parmi les améliorations envisageables de la cellule d'électrolyse se trouve le contact entre la cathode et la barre collectrice, qui doit offrir une faible résistivité au passage du courant électrique. En cours d'opération de la cellule, ce contact a tendance à se dégrader, générant des pertes énergétiques significatives. Les causes de cette dégradation, pouvant provenir de phénomènes chimiques, thermiques, mécaniques et/ou électriques, demeurent mal comprises. Le but du présent projet était donc d'étudier les phénomènes chimiques se produisant au contact bloc-barre de la cellule d'électrolyse Hall-Héroult. En premier lieu, un aspect crucial à considérer est la pénétration du bain électrolytique dans la cathode, car des composés de bain atteignent éventuellement la barre collectrice et peuvent y réagir. A cet effet, une méthode novatrice a été développée afin d'étudier les cathodes et la pénétration du bain dans celles-ci à l'aide de la microtomographie à rayons X. Cette méthode rapide et efficace s'est avérée fort utile dans le projet et a un potentiel important pour l'étude future des cathodes et des phénomènes qui s'y produisent. Ensuite, une cellule d'électrolyse rectangulaire à petite échelle a été développée. Plusieurs phénomènes observés 'en industrie sur des autopsies de cellules post-opération et rapportés dans la littérature ont été reproduis avec succès à l'aide de cette cellule expérimentale. Puis, des tests sans électrolyse, ciblant l'effet du bain électrolytique sur l'acier, ont aussi été conçus et complétés afin de s

  9. Le renforcement de l'interface entre les services de santé publique et de première ligne : enjeux et pistes de solution

    PubMed Central

    Paquette, Daniel; Reinharz, Daniel

    2009-01-01

    Le développement de liens étroits entre la santé publique et les services cliniques, notamment ceux offerts par les médecins de famille œuvrant en première ligne, est prôné dans tous systèmes de santé occidentaux. On suppose que les collaborations formant une telle interface ont des impacts positifs à la fois sur la qualité des soins, sur le fardeau des maladies et sur l'équité dans le système de santé. Si les acteurs des deux domaines admettent le bien-fondé de l'interface et favorisent en principe son développement, plusieurs barrières nuisent aux collaborations dans la réalité. Or, peu est connu sur ces barrières dans le système de santé québécois. Cette étude vise à répondre à ce manque d'information en étudiant l'interface à partir d'une perspective organisationnelle. Deux cadres conceptuels ont été utilisés, soit la typologie de Lasker (1997) et les archétypes de Hinings et Greenwood (1988). L'analyse met en évidence deux des six formes de collaboration proposées par la typologie utilisée, soit la coordination des services aux individus et la mise à profit des rencontres cliniques pour les fins de la santé publique. Les activités associées à ces formes de collaboration, qui sont importantes eu égard au mandat de la santé publique, comportent un intérêt essentiellement pour la santé publique et sont déterminées en pratique unilatéralement par cette dernière. En outre, le manque de coordination des activités qui impliquent une collaboration avec les médecins constitue un obstacle au développement de telles activités en créant des irritants pour les médecins. Il y a donc, dans le système de santé québécois, des possibilités de développement de l'interface là où la collaboration se fait également au profit du travail clinique et là où elle tient compte des contraintes du milieu clinique. PMID:20436801

  10. Pincharse sin infectarse: estrategias para prevenir la infección por el VIH y el VHC entre usuarios de drogas inyectables

    PubMed Central

    MATEU-GELABERT, P.; FRIEDMAN, S.; SANDOVAL, M.

    2011-01-01

    infectarse por el VIH (sólo un doble negativo tuvo un amplio conocimiento sobre la hepatitis C). Estas intencionalidades no son mutuamente excluyentes. La presencia de varias refuerza la puesta en práctica a diario de comportamientos que pueden ayudar al que se inyecta a mantenerse libre de infecciones durante años. Algunas prácticas que hemos identificado se implementan en grupo y se comunican de UDI a UDI, de esta manera se extienden entre algunas redes sociales de UDI. Conclusiones Los UDI que permanecen sin infectarse planean e implementan estrategias de prevención en circunstancias donde otros UDI aplican prácticas de riesgo. El mantenimiento de la no infección no es, por lo tanto, un resultado del azar, sino más bien el resultado del esfuerzo (agencia) de los UDI. Investigar y extender estas estrategias y tácticas a través de programas de prevención podría contribuir a la prevención del VIH y el VHC. PMID:21915175

  11. Le transfert de connaissances entre les mathematiques et les sciences. Une etude exploratoire aupres d'eleves de 4e secondaire

    NASA Astrophysics Data System (ADS)

    Samson, Ghislain

    2003-06-01

    Au moment ou dans plusieurs pays on travaille a refondre les programmes d'etudes, tant au primaire qu'au secondaire, l'interet pour le transfert renait. Un des concepts fondamentaux en apprentissage consiste en l'habilete a reutiliser de facon consciente et efficace un acquis d'une situation a une autre situation. Cette recherche emane de preoccupations professionnelles au moment ou le chercheur etait enseignant au secondaire. Au cours de ces annees, il lui a ete possible de constater que plusieurs eleves percevaient difficilement les liens presents entre les disciplines mathematiques et scientifiques. Des travaux en psychologie cognitive et plus particulierement selon une perspective du traitement de l'information ont servi de cadre de reference pour evaluer et analyser les capacites de transfert aupres d'eleves de 4e secondaire. Ce cadre de reference permet de formuler le principal objectif qui est de mieux comprendre le processus de transfert chez des eleves en situation de resolution de problemes scientifiques. Cette these s'interesse donc au transfert en tant que phenomene important du processus d'apprentissage au sens de l'integration. La methode de recherche choisie, de nature qualitative, est principalement axee sur l'evaluation de la capacite a transferer des connaissances lors d'une epreuve et d'un entretien. Pour evaluer ce potentiel de transfert, nous avons elabore deux outils: une epreuve en mathematiques et en sciences et un guide d'entretien. Pour la passation de l'epreuve, le chercheur a pu compter sur la collaboration de 130 sujets provenant de deux ecoles. L'entretien complete la prise de donnees avec 13 sujets ayant accepte de poursuivre l'etude. Les donnees recueillies par ces instruments font ensuite l'objet d'une analyse de contenu. En premier lieu, les verbatims de l'epreuve et de l'entretien ont ete transcrits, puis codifies. La correction des reponses fournies pour les problemes resolus s'est faite a partir d'une grille d

  12. Association entre les hormones sexuelles, les marqueurs de remodelage osseux et la densité minérale osseuse chez des femmes ménopausées d'origine marocaine (étude transversale)

    PubMed Central

    El Maataoui, Aissam; Biaz, Asmae; El Boukhrissi, Fatima; El Machtani, Si; Dami, Abdellah; Bouhsain, Sanae; Bamou, Youssef; El Maghraoui, Abdellah; Ouzzif, Zhor

    2015-01-01

    Introduction Le présent travail se propose d’étudier la relation entre les hormones sexuelles, notamment l’œstradiol et l'indice de l’œstradiol libre, le sulfate de déhydroépiandrosterone et la sex hormone binding globulin, les marqueurs de remodelage osseux et la densité minérale osseuse chez une population de femmes marocaine ménopausées. Méthodes Il s'agit d'une étude transversale, menée sur une période de 6 mois d'octobre 2012 à fin avril 2013 et ayant fait participer deux cent deux (202). Résultats L’œstradiol et l'indice d’œstradiol libre (IEL) ont montré une corrélation négative respectivement à l'ostéocalcine (OC), à la crosslaps (β-CTX) et l'OC (p<0.001). La sulfate de déhydroepiandrosterone S-DHEA a été corrélée positivement à l'OC (p<0.001), alors que e taux sérique de la sex hormone binding globulin (SHBG) l'a été corrélé à la β-CTX et l'OC (p<0.001). Par ailleurs, une corrélation positive a été établie entre la densité minérale osseuse (DMO) au col de fémur et le poids, l'indice de masse corporelle (IMC), l'IEL et la S-DHEA. Une corrélation négative a été retrouvée entre la DMO au col de fémur d'une part et l’âge, la DDR, la SHBG, la β-CTX et l'OC d'une autre part. Conclusion Le présent travail montre que l'augmentation de l’âge et la diminution de l’œstradiol libre expliquent la diminution de la DMO au niveau du col du fémur, alors que l'augmentation du taux sérique de la SHBG et la diminution du poids expliquent la diminution de la DMO au rachis lombaire. PMID:26848353

  13. Competition entre supraconductivite et magnetisme au voisinage de la transition de Mott dans le conducteur organique quasi-bidimensionnel k-(BEDT-TTF)2copper[N(CN)2]bromine

    NASA Astrophysics Data System (ADS)

    Fournier, David

    Les conducteurs organiques quasi-bidimensionnels kappa-ET2X presentent d'importantes similitudes avec les SCHT telles qu'une phase isolant de Mott, un regime de pseudogap et un etat supraconducteur. L'etude de leurs proprietes apparait donc complementaire. Parmi les interrogations persistantes concernant la physique de ces systemes, l'origine du (ou des) processus exotique d'appariement, responsable de la supraconductivite est le sujet suscitant l'interet le plus marque dans la communaute. L'hypothese d'un mecanisme lie a la proximite d'un etat antiferromagnetique est privilegiee. Une etape importante dans la resolution de cette problematique est l'identification de la symetrie du parametre d'ordre. D'apres de nombreux travaux sur les systemes fortement correles, la sonde ultrasonore, de par sa sensibilite aux excitations de quasiparticule a basse temperature, est consideree comme particulierement adaptee a l'etude de cette propriete. Cependant, son emploi necessite l'utilisation d'un compose metallique a basse temperature et completement supraconducteur. Le compose metallique organique kappa-ET 2Cu[N(CN)2]Br presente toutes les caracteristiques necessaires a l'etude de cette propriete. En effet, il est situe loin de la transition du premier ordre de Mott et est completement supraconducteur. De facon surprenante, ce systeme semble se coupler fortement avec le reseau ce qui augmente significativement la sensibilite de cette sonde aux proprietes du gaz electronique. Cependant, des difficultes techniques importantes, liees a la nature intrinseque de ce materiau, doivent etre surmontees pour proceder a des mesures suivant differentes polarisations. La presente etude a profondement modifie notre comprehension de ce systeme. En effet, ces mesures ont permis de constater que le kappa-ET2Cu[N(CN)2]Br est un compose qui est situe en bordure de la zone de coexistence entre la supraconductivite et le magnetisme, ce qui constitue un resultat totalement inattendu. De plus, la

  14. Factores socio-económicos asociados a la percepción de situación socioeconómica entre adultos mayores de dos países latinoamericanos

    PubMed Central

    Brenes-Camacho, Gilbert

    2014-01-01

    El objetivo principal del artículo es estudiar la asociación entre la percepción subjetiva sobre la situación económica propia y una serie de medidas objetivas de bienestar socioeconómico –fuentes de ingresos, tenencia de vivienda, nivel educativo y transferencias familiares informales de dinero- entre adultos mayores de dos países Latinoamericanos: México y Costa Rica. Los datos se obtienen de las primeras rondas de dos encuestas sobre envejecimiento: CRELES para Costa Rica y ENASEM para México. La variable dependiente más importante se obtiene de las respuestas a las pregunta “¿Cómo califica su situación económica actual?” en Costa Rica y “¿Diría usted que su situación económica es…?” en México. Para ambas encuestas, las respuestas se codificaron en forma binaria; el código 0 representa las categorías Excelente, Muy buena y Buena, y el código 1 representa a las categorías Regular y Mala. Se encontró que el ingreso por jubilación es un importante determinante de la percepción de bienestar en ambos países. En Costa Rica, el ingreso del cónyuge y la tenencia de vivienda son importantes predictores de la percepción de bienestar, mientras que en México, los ingresos por transferencias están fuertemente asociados con dicha percepción. PMID:25360057

  15. Determinação de elementos próprios dos asteróides troianos: comparação entre as teorias semi-analítica e sintética

    NASA Astrophysics Data System (ADS)

    Roig, F.; Beaugé, C.

    2003-08-01

    Além do cálculo semi-analítico de elementos próprios dos asteróides Troianos (Beaugé & Roig 2001, Icarus 153, 391), recentemente foi apresentado um novo conjunto destes elementos próprios determinado através de uma teoria sintética (Knenezevic & Milani 2003, comunicação pessoal). As bases de dados contendo estas determinações estão disponiveis na pagina web do Asteroid Dynamical Site (http://hamilton.dm.unipi.it/cgi-bin/astdys/astibo). Nesta comunicação apresentamos os primeiros resultados de um estudo comparativo entre ambos conjuntos de elementos próprios, analisando suas vantagens e desvantagens, assim como os limites de precisão de cada conjunto. Mostramos que os elementos próprios sintéticos são mais precisos que os smi-analíticos para grandes amplitudes de libração do ângulo s = l-lJup, embora acontece o contrario para os corpos cuja amplitude de libração é muito pequena. Finalmente discutimos a influencia destes erros na determinação de familias de asteroides e da estrutura resonante em torno dos pontos Lagrangeanos L4 e L5.

  16. Aceptabilidad del diagnóstico rápido casero para HIV entre hombres gay y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires.

    PubMed

    Balán, Iván C; Carballo-Diéguez, Alex; Marone, Rubén O; Pando, María A; Barreda, Victoria; Avila, María M

    2011-03-01

    El uso del diagnóstico rápido para HIV en Argentina, así como otros países de Latinoamérica, ha sido limitado hasta el momento. Este trabajo reporta los resultados provenientes de un estudio cualitativo realizado entre hombres gays y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires, Argentina. El objetivo principal del mismo fue conocer las ventajas y desventajas que los hombres G&HSH perciben en relación al diagnóstico rápido casero para HIV. Se realizaron ocho grupos focales con 73 participantes en los cuales se discutió acerca de las ventajas y desventajas del uso de los diagnósticos rápidos. Las respuestas fueron codificadas utilizando un programa para análisis de datos cualitativos (NVivo) y analizadas temáticamente. Los participantes describieron numerosas ventajas sobre el uso del diagnóstico rápido casero, aunque algunos reportaron importantes preocupaciones dentro de las cuales se destaca la posibilidad de impulsos suicidas si alguien recibe un resultado positivo estando solo. En términos generales se observó una gran aceptabilidad para el uso del diagnóstico rápido si el mismo es realizado por personal de salud en lugares acondicionados para este fin. PMID:25284951

  17. Aceptabilidad del diagnóstico rápido casero para HIV entre hombres gay y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires

    PubMed Central

    Balán, Iván C.; Carballo-Diéguez, Alex; Marone, Rubén O.; Pando, María A.; Barreda, Victoria; Ávila, María M.

    2011-01-01

    Resumen El uso del diagnóstico rápido para HIV en Argentina, así como otros países de Latinoamérica, ha sido limitado hasta el momento. Este trabajo reporta los resultados provenientes de un estudio cualitativo realizado entre hombres gays y otros hombres que tienen sexo con hombres (G&HSH) de la Ciudad de Buenos Aires, Argentina. El objetivo principal del mismo fue conocer las ventajas y desventajas que los hombres G&HSH perciben en relación al diagnóstico rápido casero para HIV. Se realizaron ocho grupos focales con 73 participantes en los cuales se discutió acerca de las ventajas y desventajas del uso de los diagnósticos rápidos. Las respuestas fueron codificadas utilizando un programa para análisis de datos cualitativos (NVivo) y analizadas temáticamente. Los participantes describieron numerosas ventajas sobre el uso del diagnóstico rápido casero, aunque algunos reportaron importantes preocupaciones dentro de las cuales se destaca la posibilidad de impulsos suicidas si alguien recibe un resultado positivo estando solo. En términos generales se observó una gran aceptabilidad para el uso del diagnóstico rápido si el mismo es realizado por personal de salud en lugares acondicionados para este fin. PMID:25284951

  18. Traces de l'interaction entre galaxies

    NASA Astrophysics Data System (ADS)

    Duc, Pierre-Alain

    2016-08-01

    Within a galaxy, collisions between stars are exceptional; collisions between galaxies are themselves much more frequent. They are even supposed to play a major role in the formation of structures according to the standard hierarchical cosmological model. Gravitational interactions, tidal forces and following mergers shape the morphology of galaxies, and leave vestiges which can survive for a few Gyr. They consist of stellar shells, streams, tails and plumes which emit a diffuse and extended optical light. Several deep imaging projects use telescopes of all sizes to try to detect this light. We detail here what the census of collisional debris can tel us about the past history of galaxies and about the models and simulations supposedly accounting for it.

  19. A Concepção de Universo entre Alunos do Ensino Médio de São Paulo e suas Fontes de Aquisição

    NASA Astrophysics Data System (ADS)

    Araújo, M. A. A.; Elias, D. C. N.; Amaral, L. H.; Araújo, M. S. T.; Voelzke, M. R.

    2006-08-01

    Nesse trabalho procurou-se identificar por meio de um questionário as concepções de Universo, de espaço e tempo que sustentam a visão de mundo de um grupo de 270 estudantes de Ensino Médio, pertencentes a três escolas de São Paulo. As questões relacionadas aos conhecimentos prévios dos estudantes permitiram constatar que há pouco conhecimento acerca dos temas investigados, destacando-se que apenas 20% dos alunos foram capazes de relacionar as semanas com as fases da lua, enquanto 28% associaram as estações do ano à inclinação do eixo de rotação da Terra e 23% tinham noções das distâncias entre objetos celestes próximos da Terra. Enquanto 56% conseguiram relacionar o Big Bang com a origem do Universo, verificou-se que 37% reconheciam ano-luz como unidade de distância e 60% concebiam o Sol como uma estrela. No que se refere às fontes de aquisição que proporcionaram esses conhecimentos, apesar de 60% dos alunos indicarem a escola como principal fonte dos conhecimentos de Ast! ronomia, verificou-se claramente que para a maioria dos alunos seus conceitos ainda são inadequados, havendo necessidade de aprimoramento da abordagem desses conteúdos, pois apesar de popular, a Astronomia ainda é veiculada de maneira pouco esclarecedora e com imprecisões. Nesse contexto, são discutidas algumas possíveis contribuições que podem ser dadas para o ensino de Astronomia pelo uso das ferramentas computacionais nas escolas.

  20. Distinción Empírica Entre Engagement y Trabajolismo en Enfermeras Hospitalarias de Japón: Efecto Sobre la Calidad del Sueño y el Desempeño Laboral

    PubMed Central

    Kubota, Kazumi; Shimazu, Akihito; Kawakami, Norito; Takahashi, Masaya; Nakata, Akinori; Schaufeli, Wilmar B.

    2016-01-01

    Objetivo El objetivo de este estudio es demostrar la distinción entre engagement y trabajolismo, estudiando su relación con la calidad del sueño y el desempeño laboral. Método Un total de 447 enfermeras de 3 hospitales de Japón fueron entrevistadas mediante un cuestionario autoadministrado que incluía la escala Utrecht (UWES, Utrecht Work Engagement Scale), la Escala de Adicción al Trabajo Holandesa (DUWAS, Dutch Workaholism Scale), preguntas sobre la calidad del sueño (7 ítems) con respecto a (1) dificultad para conciliar el sueño, (2) dificultad para mantener el sueño, (3) despertar temprano por la mañana, (4) dormirse o tomar siestas durante el día, (5) somnolencia diurna excesiva en el trabajo, (6) dificultad para despertarse por la mañana, y (7) despertar cansado en la mañana, y el Cuestionario sobre Salud y Desempeño (CSD) de la Organización Mundial de la Salud. Resultados Los modelos de ecuaciones estructurales demostraron que el engagement se relaciona positivamente con la calidad del sueño y el rendimiento laboral, mientras que el trabajolismo tiene una relación negativa con la calidad del sueño y el desempeño laboral. Conclusión Los resultados indican que el engagement y el trabajolismo son conceptualmente diferentes. El primero tiene una connotación positiva, mientras que el segundo se asocia de manera negativa al bienestar (buena calidad del sueño y buen rendimiento en el trabajo). PMID:26752805

  1. L’annonce d’une déficience motrice cérébrale : Une relation de confiance à construire entre les parents, le personnel paramédical et les médecins

    PubMed Central

    Pelchat, Diane; Lefebvre, Hélène; Bouchard, Jean-Marie

    2001-01-01

    RÉSUMÉ : L’annonce d’une déficience motrice cérébrale et des incapacités qui en découlent est une situation difficile à vivre pour les parents et les dispensateurs de soins (personnel paramédical et médecins). Un examen de la documentation médicale démontre que depuis vingt ans, le nombre de parents insatisfaits n’a pas changé. L’étude de type qualitatif et exploratoire, effectuée à la demande de milieux de réadaptation, vise à décrire le processus d’annonce d’un diagnostic de déficience motrice cérébrale (DMC) à partir de l’expérience des différents acteurs en cause et à déterminer les facteurs qui facilitent ou compliquent la relation de confiance. Les résultats indiquent que les parents et les dispensateurs de soins vivent dans deux mondes de perception différents au moment de l’annonce, lesquels se rejoignent difficilement. Les parents sont envahis par le drame qu’ils vivent, tandis que les médecins sont concentrés sur le contenu à transmettre aux parents. Cette annonce provoque une importante incertitude qui bloque la communication entre les partenaires, mais elle pourrait devenir un stimulant à de nouvelles stratégies d’adaptation. PMID:20084263

  2. Establishing the Empirical Relationship Between Non-Science Majoring Undergraduate Learners' Spatial Thinking Skills and Their Conceptual Astronomy Knowledge. (Spanish Title: Estableciendo Una Relación Empírica Entre el Razonamiento Espacial de los Estudiantes de Graduación de Carreras no Científicas y su Conocimento Conceptual de la Astronomía.) Estabelecendo Uma Relação Empírica Entre o RacioCínio Espacial dos Estudantes de Graduação EM Carreiras Não Científicas e Seu Conhecimento Conceitual da Astronomia

    NASA Astrophysics Data System (ADS)

    Heyer, Inge; Slater, Stephanie J.; Slater, Timothy F.

    2013-12-01

    The astronomy education community has tacitly assumed that learning astronomy is a conceptual domain resting upon spatial thinking skills. As a first step to formally identify an empirical relationship, undergraduate students in a non-major introductory astronomy survey class at a mediumsized, Ph.D. granting, mid-western US university were given pre- and post-astronomy conceptual diagnostics and spatial reasoning diagnostics, Instruments used were the "Test Of Astronomy Standards" and "What Do You Know?" Using only fully matched data for analysis, our sample consisted of 86 undergraduate non-science majors. Students' normalized gains for astronomy surveys were low at .26 and .13 respectively. Students' spatial thinking was measured using an instrument designed specifically for this study. Correlations between the astronomy instruments' pre- to post-course gain scores and the spatial assessment instrument show moderate to strong relationships suggesting the relationship between spatial reasoning and astronomy ability can explain about 25% of the variation in student achievement. La comunidad de educación en astronomía ha supuesto de forma tácita que el aprendizaje de la astronomía consiste en un dominio conceptual fundamentado en el razonamiento espacial. Como un primer paso para identificar formalmente una relación empírica entre estas dos cosas, utilizamos como muestra los estudantes de graduación de carreras no científicas de un curso experimental en una universidad norteamericana del medioeste de porte mediano con programa de Doctorado em curso, en el cual estos estudiantes se sometieron a un diagnóstico de razonamiento espacial y conceptos astronómicos antes e después del mismo. Las herramientas utilizadas fueron el Test Of Astronomy Standards (TOAST) y el cuestionario What do you know? Utilizando solo los datos completamente consistentes para este análisis, nuestra muestra consistió en 86 estudantes de graduación. Las mejoras, depués de

  3. "Lo Ultimo": "Consejos"--"Un Dialogo Respetoso Entre Colegas"

    ERIC Educational Resources Information Center

    Vasquez, Olga A.; Flores, Belinda Bustos; Clark, Ellen Riojas

    2001-01-01

    "Los testimonios," or life stories, shared in this volume reveal that academia represents a labyrinth of challenges for aspiring and emerging Latina scholars--a story these authors know all too well. As Latina "veterana" scholars, who have traveled this arduous journey, the authors recognize that their collective efforts have…

  4. Evaluacion entre colegas profesores (Peer Review of Teachers). ERIC Digest.

    ERIC Educational Resources Information Center

    Hertling, Elizabeth

    This digest in Spanish examines peer review, focusing on how these types of reviews can improve teacher competence. Peer review is often linked to peer assistance, which helps new and veteran teachers improve their knowledge and skills. In peer-review programs, consulting teachers conduct formal evaluations and recommend whether the participating…

  5. Etude de la flore bactérienne contaminant les téléphones mobiles avant et après la désinfection: comparaison entre les professionnels soignants de l'hôpital militaire d'instruction Mohammed V de Rabat et les témoins

    PubMed Central

    Uwingabiye, Jean; Moustanfii, Wafaa; Chadli, Meryem; Sekhsokh, Yassine

    2015-01-01

    Introduction L'objectif de notre travail était évaluer la contamination microbienne des téléphones mobiles utilisés par les personnels soignants des différents services de l'hôpital militaire d'instructions Mohammed V de Rabat et la comparer à celui d'une population témoin et aussi démontrer l'efficacité des solutions hydroalcoolique dans la désinfection de ces téléphones mobiles. Méthodes Il s'agit d'une étude descriptive transversale réalisée sur une période de 9 mois entre septembre 2010 et juin 2011, dans le service de bactériologie de l'hôpital militaire d'Instruction Mohammed V. Résultats L’étude bactériologique a été faite sur 240 téléphones mobiles dont 50% provenaient de personnels de sante. Le taux de contamination bactérienne de tous les téléphones mobiles était de 100%. Les cultures des bactéries isolées au niveau des téléphones mobiles du personnel médical étaient plus polymorphes que celles de la population témoin (p=0,028). Parmi 437 bactéries isolées: 223(51%) provenaient de téléphones de personnels de santé et 214(49%) de téléphones de la population témoin avec une différence qui n’était pas statistiquement significative(p>0,05) sauf pour les isolats de Staphylocoque à coagulase négative et Staphylococcus aureus. Les bactéries isolées étaient représentées par: Staphylocoque à coagulase (57,7%), Staphylococcus aureus (18,1%), Corynebacterium sp (18,8%), Bacillus sp (2,3%) et autres (2,2%). La différence entre la prévalence des bactéries isolées selon les services et les fonctions des personnels de santé n’était pas statistiquement significative (p>0,05). La désinfection des téléphones portables par la solution hydroalcoolique a réduit à 99,5% le nombre des colonies. Conclusion Ce travail montre que les téléphones portables pourraient jouer un rôle dans la transmission des infections nosocomiales et communautaires. Dans le cadre de prévention de ces risques, il faut

  6. Toxicité sérotoninergique résultant d’une interaction médicamenteuse entre le bleu de méthylène et les inhibiteurs de la recapture de la sérotonine

    PubMed Central

    Charbonneau, Annie

    2013-01-01

    RÉSUMÉ Contexte : Le bleu de méthylène est employé en pratique pour diverses raisons médicales. Des données récentes ont évoqué une interaction potentielle avec les inhibiteurs de la recapture de la sérotonine, pouvant conduire à une toxicité sérotoninergique. Objectif : Décrire le risque de toxicité sérotoninergique associé à l’interaction entre le bleu de méthylène et les inhibiteurs de la recapture de la sérotonine. Sources de l’information : Les publications pertinentes ont été ciblées systématiquement au moyen des moteurs de recherche MEDLINE (1946 au 21 mars 2013) et Embase (1974 à 2013, semaine 11) en utilisant les mots clés suivants : methylene blue, methylthioninium, monoamine oxidase inhibitors, serotonin reuptake inhibitors et serotonin syndrome. Aucune restriction touchant l’indication du bleu de méthylène ou la langue n’a été appliquée. Les références des publications ont également été analysées. Sélection des études et extraction des données : Dix-huit études de cas et deux séries de cas systématiques ont été sélectionnées. Aucune étude clinique aléatoire n’a encore été publiée. Synthèse des résultats : La première étude de cas à avoir soupçonné une interaction entre le bleu de méthylène et les inhibiteurs de la recapture de la sérotonine est parue en 2003. Dix-sept autres études de cas décrivant le même type d’interaction ont par la suite été rapportées. Les deux séries de cas ont regroupé les données de quelques 325 parathyroïdectomies où le bleu de méthylène avait été employé comme agent colorant. Les 17 patients qui ont présenté une toxicité du système nerveux central prenaient tous en période préopératoire des inhibiteurs de recapture de la sérotonine. Conclusion : Lorsqu’il est administré en concomitance avec des inhibiteurs de recapture de la sérotonine, le bleu de méthylène peut conduire à une toxicité sérotoninergique à une dose aussi

  7. [The academization of primary care].

    PubMed

    Aragón-Robles, Javier; Vidal-Licona, Patricia; Mendoza-Salas, Karem

    2016-01-01

    Sr. Editor: Después de leer con interés el artículo editorial denominado "La academización del primer nivel de atención", escrito por la Dra. Liz Hamui Sutton y el Dr. José Halabe Cherem, queremos comentarle la experiencia que tenemos al respecto en la Facultad de Medicina de la Universidad Nacional Autónoma de México (UNAM). La Secretaría de Enseñanza Clínica e Internado Médico, en el año 1997, introdujo siete unidades del primer nivel de atención para que los educandos pudieran tener la oportunidad de desarrollar sus competencias profesionales en ambientes cuidados, controlados y, además, acordes al perfil de egreso como médicos generales. Paulatinamente se han ido incorporando más, y en la actualidad se cuenta con 31 sedes pertenecientes al Instituto Mexicano del Seguro Social (IMSS) y al Instituto de Seguridad Social y Servicios de los Trabajadores del Estado (ISSSTE). Estos campos clínicos permiten la adquisición y desarrollo de habilidades propias de la propedéutica médica, pues de manera natural se dan las interrelaciones entre estudiantes, profesores y pacientes, adquiriendo aprendizajes significativos, en la teoría y en la práctica clínica. En el año 2015 se supervisaron 15 de estas sedes. En estas visitas se aplicó una encuesta de opinión a los estudiantes y se entrevistó a los alumnos y profesores. En general, los educandos señalaron que se sienten satisfechos con su aprendizaje, que es prácticamente personalizado y de buen nivel académico. También los docentes y las autoridades señalaron sentirse contentos por contar con alumnos que, en su mayoría, eran responsables y comprometidos. PMID:27160629

  8. La Communicacion entre los Centros de Investigacion en Educacion (Communication among Educational Research Centers).

    ERIC Educational Resources Information Center

    Schiefelbein, Ernesto

    1972-01-01

    In Latin America there is a lack of communication concerning educational research. This lack has been underlined in many regional meetings, but no action has been taken. Possible steps that would lead to improvement include circulation of research summaries, both for completed and current works, efforts by research centers to organize meetings,…

  9. Actividades interrelacionadas entre el nino y la familia (Interrelated Activities between the Child and the Family).

    ERIC Educational Resources Information Center

    Veglio, Ana M.

    1993-01-01

    Offers a rationale for parent involvement in early childhood education. Describes the benefits of mother-child gymnastics in terms of the development of motor skills and positive attitudes toward school. Highlights particular exercises and games. (AC)

  10. "Entre Familia": Immigrant Parents' Strategies for Involvement in Children's Schooling

    ERIC Educational Resources Information Center

    Poza, Luis; Brooks, Maneka Deanna; Valdés, Guadalupe

    2014-01-01

    Teachers and administrators in schools with large, working-class Latino populations often complain of parents' indifference or lack of involvement in children's schooling because of their low visibility at school events and relatively little face-to-face communication with teachers and school administration. In a series of…

  11. Dominicanas entre La Gran Manzana y Quisqueya: Family, Schooling, and Language Learning in a Transnational Context

    ERIC Educational Resources Information Center

    Rodriguez, Tracy

    2009-01-01

    Drawing from a one-year qualitative research study, this article explores the transnational lives and experiences of three young women and their little sisters in New York with close ties to the Dominican Republic. Using ethnographic research methods--life history interviews, focus groups, participant observation, and document analysis, I examine…

  12. La formation a Bukavu au Zaire: une course entre l'education et la catastrophe

    NASA Astrophysics Data System (ADS)

    Balegamire, Bazilashe Juvénal

    1996-11-01

    A description of the socio-educational situation in Bukavu since the colonial era clearly shows why the population has sought means of overcoming the gradual abandonment by the Zairean State of its responsibilities, which has been aggravated by the large-scale influx into Kivu, in Eastern Zaire, of refugees from Rwanda and Burundi and of Zaireans who has been living in those countries for some years. These means are principally trade occupations, small-time selling, short-term vocational training and higher and university education at private institutions which are financed locally and/or by funds from the North. A new approach has been deveoped, that of training the trainers working for non-governmental development organisations. Trainers of trainers have been recruited locally among the many graduates of the Higher Institutes of Education and Rural Development, which have been affected by unemployment and the miserable salaries which the State offers to its employees. The trainers of trainers could be trained by the Higher Institute of Rural Development, making the largest possible use of local skills. However, such training should be one of a set of reforms of the Zairean education system. All of this only makes sense if Zaire and its neighbours urgently defuse present socio-political tensions so that all of our populations can peacefully and resolutely engage in the healthy transformation of our societies.

  13. Entre Dos Mundos/Between Two Worlds: Bicultural Development in Context

    ERIC Educational Resources Information Center

    Bacallao, Martica L.; Smokowski, Paul R.

    2009-01-01

    How do Mexican immigrant adolescents balance different, and often oppositional, cultural influences in the acculturation process? In this article, we explore how acculturating adolescents absorb cultural messages and go about creating their (multiple) identities. Guided by Alternation Theory, in-depth qualitative interviews were conducted with 12…

  14. Let's Talk About Water: Film Screenings as an Entrée to Water Science

    NASA Astrophysics Data System (ADS)

    Hooper, R. P.; Lilienfeld, L.; Arrigo, J.

    2011-12-01

    "Let's Talk about Water" is a film symposium designed to bring together experts and the public to talk about the complex water issues facing society. The format of the event is quite simple: a panel of experts and the audience view a water documentary (such as "FLOW", "Liquid Assets", or "Gasland") together and there is an extended moderated discussion period following the film between the panel and the audience. Properly handled, this simple format can be very effective. A film creates a context of subject and language for the discussion--it gets the audience and the panel on the same page. The moderators must actively manage the discussion, both challenging the panelists with follow up questions, asking questions to simplify the language the expert is using, and passing a question among panelists to bring out different points of view. The panelists are provided with the film in advance to view and, most importantly, meet the day before the event to discuss the film. This makes for a much more convivial discussion at the event. We have found that these discussions can easily be sustained for 90 to 120 minutes with active audience participation. This format has been applied at college campuses with a target audience of lower-level undergraduates. Student clubs are engaged to help with publicity before the event and to assist with registration and ushering during the event. Appropriate classes offer extra credit for student attendance to ensure a strong turnout. A Hollywood film ("Chinatown" in southern California, "A Civil Action" in Boston) is shown on campus during the week preceding the event to help advertise the event. The event itself is typically held on a Saturday with a morning screening of the film. The audience is provided with index cards and pencils to write down questions they have about the film. A lunch is provided during which the questions are organized and used to initiate different discussion themes. The discussion begins with points raised by the movie (are these issues real? Do they apply here? What are the scientific, engineering, and policy solutions to these problems?) and then segues into a discussion about career opportunities in the water sector. Our past events at UC Irvine and at UMass Boston have been successful in attracting large audiences and have been viewed positively by attendees.

  15. New York: Les ecoles entre SURR et STAR (New York: Schools between SURR and STAR).

    ERIC Educational Resources Information Center

    Ueberschlag, Roger

    1994-01-01

    Three problems of New York City (New York) schools--overpopulation, low academic standards, violence--are examined, and an effort led by parent and teacher organizations to improve conditions is described. Threatened closings (schools under registration review, SURR) and a program of violence reduction (Straight Talk about Risks, STAR) are noted.…

  16. GPS, punto de contacto entre la Astronomía y otras disciplinas

    NASA Astrophysics Data System (ADS)

    Perdomo, R.

    En los primeros años de la pasada década, un grupo de Astrónomos de La Plata iniciaron trabajos de investigación en Geodesia Satelital. En esta presentación se propone repasar sus principales logros y situarlos en el contexto del desarrollo de la disciplina a nivel mundial. Por entonces las aplicaciones prácticas de la disciplina eran indirectas y solo evidentes para los especialistas. Los errores del Posicionamiento Satelital eran de varios metros y en posicionamiento relativo, del orden de medio metro. Estos resultados se lograban al cabo de varios días de medición continuada. En los años siguientes, el sistema GPS alcanzó su nivel operacional y produjo una revolución tanto en lo relacionado con los tiempos de medición como con las precisiones. El grupo de La Plata se desarrolló simultáneamente con GPS, lo que posibilitó su participación actual en diversos temas vigentes: aplicaciones de alta precisión para la materialización de sistemas terrestres de referencia, monitoreo de movimientos de la corteza, contribución con servicios internacionales para la determinación de movimientos tectónicos globales y regionales, monitoreo de la ionósfera a partir de la propagación de las señales, determinación de la ondulación del geoide a escala local, etc. También se generaron muchas aplicaciones prácticas algunas en tiempo real: navegación, apoyo a imágenes aéreas o satelitales, aplicaciones a la agricultura, catastro y ordenamiento territorial, apoyo a relevamientos geofísicos, etc.

  17. Vinculación entre varios cúmulos estelares y estructuras del medio interestelar

    NASA Astrophysics Data System (ADS)

    Corti, M. A.; Baume, G. L.; Panei, J. A.; Suad, L. A.; Testori, J. C.; Borissova, J.; Kurtev, R.; Chené, A. N.; Ramirez Alegría, S.

    2015-08-01

    We study the embedded clusters DBS77, 78, 102, 160, and 161 located in the Galactic plane in the fourth quadrant of the Milky Way and the surrounding interstellar medium (ISM). We analyzed UBVIc photometry (SOAR) and infrared spectroscopy (NTT, ESO). We complemented these data with JHK (VVV2MASS), HI 21 cm bands (SGPS), 1.4 GHz (ATCA), and 4.85 GHz (PMN). We did multiband analysis and spectral classification of the brightest stars in each area. We also identified the ISM structures possibly related to the clusters. Finally, we obtained the main parameters of the studied clusters, the structures of the ISM and the link between them.

  18. L'Harmonisation des langues maliennes: entre l'Integration nationale et régionale

    NASA Astrophysics Data System (ADS)

    Ouane, Adama

    1991-03-01

    The standardization of Malian languages, which began in the period after independence, has been an educational reform guided more by linguists than by any institutional framework laid down by the political authorities of the country. This situation has permitted the technical application of a scientific strategy, but it has not led to widespread and general acceptance of the formulas which have been worked out. The consequent opposition between technical and political considerations, which have admittedly not always been in conflict, has been complicated by a set of additional factors which have made it difficult to reconcile internal (national) harmonization, dictated by local tendencies and balances between languages, and the need to respect the (regional) ecolinguistics of the country, whose linguistic and sociocultural divisions frequently extend well into other countries of the sub-region. This conflict is illustrated by the example of Malian languages with a wide regional distribution — Bamanan (Bambara) and Fulfulde (Fulani) — and by that of languages with a narrower distribution such as Bomu and Syenara-Mamara. The standardization of orthography and the creation of terminology in the MAPE (Mandingo-Peul) Project are the manifestation of a general acceptance of regionalism, while the choice of central, standard languages has often been made without regard for regional factors.

  19. L' upwelling de la côte atlantique du Maroc entre 1994 et 1998

    NASA Astrophysics Data System (ADS)

    Makaoui, Ahmed; Orbi, Abdelattif; Hilmi, Karim; Zizah, Soukaina; Larissi, Jamila; Talbi, Mohammed

    2005-12-01

    The pelagic ecosystem of the Moroccan Atlantic coast is influenced by the spatiotemporal variability of upwelling. The changes in the physicochemical and biological parameters as well as their interrelationship and regrouping by the principal components analysis allowed us to subdivide the Atlantic coast in four active areas: two areas located at the north of Cape Juby (28°N), characterised by a summery activity and two areas located at the south, active permanently, with a variable intensity. To cite this article: A. Makaoui et al., C. R. Geoscience 337 (2005).

  20. First report of alternaria leaf spot of banana caused by Alternaria alternata in the United States

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Research efforts were initiated in 2003 to identify and introduce banana (Musa spp.) cultivars suitable for production in Georgia. In spring and summer 2012, seven of the cultivars (Veinte Cohol, Novaria, Cacambou, Chinese Cavendish, Raja Puri, Blue Torres Island, and African Red) grown in the field...

  1. [In Process Citation].

    PubMed

    Fariña López, E; Estévez-Guerra, G J; Núñez González, E; Calvo Francés, F; Penelo, E

    2016-01-01

    Fundamento. Adaptar y validar en español el cuestionario Perception of Restraint Use Questionnaire, que mide la importancia que dan los profesionales al uso de restricciones físicas en personas mayores.Método. Estudio multicéntrico, descriptivo y transversal. Tras un proceso de traducción-retrotraducción, se obtuvo una versión en español del cuestionario original. La validación se llevó a cabo entre una muestra de 830 profesionales seleccionados en veinte centros de tres comunidades autónomas españolas. Se analizó la viabilidad, la fiabilidad mediante la consistencia interna y la estabilidad temporal (test-retest), así como la validez de contenido (panel de expertos e índice de validez) y de constructo (análisis factorial).Resultados. De los 17 ítems del cuestionario, 15 pudieron traducirse de manera literal; en dos hubo que realizar modificaciones menores. Un estudio piloto confirmó la adecuada viabilidad del cuestionario. El alfa de Cronbach fue de 0,92 y la fiabilidad test-retest (CCI) de 0,908 (IC del 95%: 0,880-0,933). El índice de validez de contenido fue de 0,89. El análisis factorial exploratorio identificó dos dimensiones que explicaban el 63% de la varianza, presentando una fiabilidad de 0,90 y 0,93 respectivamente. Este fue sometido a un análisis confirmatorio, mostrando los indicadores un adecuado ajuste.Conclusiones. Se ha obtenido un instrumento en español con unas buenas características psicométricas y adaptado al contexto cultural de este país. Una herramienta útil para evaluar en qué situaciones se considera más necesario el uso de las restricciones físicas, lo que podría ayudar a diseñar actividades de formación encaminadas a racionalizar su aplicación.Palabras clave. Cuestionarios. Percepción. Restricción física. Anciano. Estudios de validación. PMID:27125606

  2. Alternancia entre el estado de emisión de Rayos-X y Pulsar en Sistemas Binarios Interactuantes

    NASA Astrophysics Data System (ADS)

    De Vito, M. A.; Benvenuto, O. G.; Horvath, J. E.

    2015-08-01

    Redbacks belong to the family of binary systems in which one of the components is a pulsar. Recent observations show redbacks that have switched their state from pulsar - low mass companion (where the accretion of material over the pulsar has ceased) to low mass X-ray binary system (where emission is produced by the mass accretion on the pulsar), or inversely. The irradiation effect included in our models leads to cyclic mass transfer episodes, which allow close binary systems to switch between one state to other. We apply our results to the case of PSR J1723-2837, and discuss the need to include new ingredients in our code of binary evolution to describe the observed state transitions.

  3. Estimation du risque collisionnel entre une sonde spatiale cométaire et un fragment du noyau

    NASA Astrophysics Data System (ADS)

    Desvoivres, Emmanuel; Klinger, Jürgen; Levasseur-Regourd, Anny-Chantal

    2000-03-01

    Several comets will be approached by space probes during the two next decades. The presence of a fragment of the nucleus in the coma is a real danger. We have estimated the probability of presence of a boulder in the inner coma, using a model for the dynamics of fragments. Specific recommandations are deduced in order to reduce the risk of a collision.

  4. Interactivite, relations entre interlocuteurs et constitution d'unites conversationnelles (Interaction Processes, Participants' Relationships and Definition of Conversation Units).

    ERIC Educational Resources Information Center

    Zenone, Anna

    1981-01-01

    Analyzes a type of conversational exchange where the participants focus on a given subject or theme contributing personal views to the discussion. Characterizes the relationship among the participants as a "cooperative conflict," examining the internal structure of speech acts and their illocutory functions, particularly the initiatory and…

  5. Entre el Renacimiento y el Nuevo Mundo: Vida y obras de Hernan Perez de Oliva (1494?-1531)

    ERIC Educational Resources Information Center

    Pellus Perez, Elena

    2012-01-01

    Hernan Perez de Oliva (1494?-1531) was a learned Spanish humanist who wrote his major works in the decades following the discovery of America. By articulating events of his career and literary life, my goal is to comprehend his contributions to the early literary production regarding the newly-found Americas. The thesis consists of three parts.…

  6. Detection of PhIP in grilled chicken entrées at popular chain restaurants throughout California.

    PubMed

    Sullivan, Kristie M; Erickson, Michael A; Sandusky, Chad B; Barnard, Neal D

    2008-01-01

    Heterocyclic amines (HCAs), compounds formed when meat is cooked at high temperatures particularly through pan frying, grilling, or barbequing, pose a potential carcinogenic risk to the public. It is unclear whether there is any level at which consumption of HCAs can be considered safe. Efforts to measure these compounds mainly include cooking studies under laboratory conditions and some measurement of home-cooked foods, but analysis of commercially cooked foods has been minimal. Attempts to estimate exposure of the public to these compounds must take into consideration dining outside the home, which could result in significant exposure for some individuals. We surveyed at least 9 locations each of 7 popular chain restaurants (McDonald's, Burger King, Chick-fil-A, Chili's, TGI Friday's, Outback Steakhouse, and Applebee's) in California, collecting one or two entrees from each location. Entrees were analyzed for 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine (PhIP) using high-performance liquid chromatography tandem mass spectrometry. All 100 samples contained PhIP. Concentrations were variable within and between entrees and ranged from 0.08 to 43.2 ng/g. When factoring in the weight of the entrees, absolute levels of PhIP reached over 1,000 ng for some entrees. Potential strategies for reducing exposure include the avoidance of meats cooked using methods that are known to form PhIP. PMID:18791922

  7. Metonymie dans la presse ecrite: entre discours et langue (Metonymies in the Press: Between Discourse and Language).

    ERIC Educational Resources Information Center

    Lecolle, Michelle

    2001-01-01

    This paper describes certain metonymies that are often employed in the daily French press. In such metonymies, a human being or a set of individuals are referred to by means of the name of an institutional location (i.e., a capital city, a ministry in a western country, the name of a country). These metonymic patterns do not seem to be used by…

  8. Transition quantique entre états électroniques de systèmes bi-couche

    NASA Astrophysics Data System (ADS)

    Pasquier, Vincent

    The possible phase transitions when two layers at filling factor νt=1 are gradually separated are studied in this article. In the bosonic case the system should undergo a pairing transition from a Fermi liquid to an incompressible state. In the Fermionic case, the state evolves from an incompressible (1,1,1) state to a Fermi liquid. It is speculated that there is an intermediate phase involving charge two quasiparticles. To cite this article: V. Pasquier, C. R. Physique 3 (2002) 709-715.

  9. Henri Chretien, un savant entre science et technique: reflections a propos de l'invention de l'hypergonar

    NASA Astrophysics Data System (ADS)

    Le Guet Tully, Francoise

    At the beggining of the 20-th century, French engineers and scientists were not well acquainted with some of the importnat principles of applied optics developed elsewhere, especially in Germany, over the preceding fifty years. In preparation for a career as a designer of astronomical instruments, Henri Chretien visited observatories in several countries and read widely. His research in optics produced many tangible advances. The Richy-Chretien telescope, which gained popularity in the 1960s and still in use today, was designed in 1910, based on an application of the principles developed by Abbe in Germany first to make color movies and then, though another application of the same principle, to project motion pictures onto a wide screen (The "Hypergonar" objective).

  10. Neuropatía persistente aumenta el riesgo de caídas entre supervivientes de cáncer

    Cancer.gov

    Muchas mujeres supervivientes de cáncer tienen problemas de movilidad y de otras funciones físicas como resultado de la neuropatía periférica persistente causada por el tratamiento de quimioterapia, según un estudio nuevo.

  11. Diriger un Memoire Professionnel--Entre Dispositif Institutionnel et Problematique Relationnelle: Le Cas de la Formation des Enseignants en France.

    ERIC Educational Resources Information Center

    Bailleul, Marc; Bodergat, Jean-Yves

    2001-01-01

    Describes research conducted in a French teacher training college about the supervision of preservice teachers writing professional dissertations (which became compulsory in 1991). After describing elementary and secondary level preservice teachers' perspectives, researchers examined the perspectives of their supervisors to show discrepancies.…

  12. Modelisation de l'interaction entre une impulsion laser ultrabreve et une nanostructure plasmonique en milieu aqueux

    NASA Astrophysics Data System (ADS)

    Boulais, Etienne

    There is still a limited understanding of the basic mechanisms and processes triggered by laser irradiation that lead to the damaging of the surrounding structures. In particular, there exists for the moment no complete modelling of the process that includes all potential sources of cellular damage, including temperature rise, plasma generation, pressure wave emission and vapor bubble formation. This thesis presents such a modelling, with the cell environment emulated by a much simpler aqueous medium. Water is used as its optical, mechanical and thermal characteristic are similar enough to the cell environment to enable the transposition of the results and tendencies observed in water to this medium. Modelling consists in a continuous medium based approach that uses coupled partial differential equations to simulate the nanostructure-water system's response to an ultrafast laser pulse. The time-dependant field distribution in the system is simulated using classical electromagnetic theory, while the temperature in the nanostructure is calculated using a two-temperature model. Generation and heating of a plasma in the nanostructure's vicinity from photoionization and impact ionization in the near-field, as well as from photothermal emission from the nanostructure at the metal interface are also included. This plasma locally modifies the refractive index, which alters the simulated optical response of the system. Energy relaxation from this plasma as well as heat conduction from the nanostructure's lattice transfer energy to the water, which dynamics and thermodynamics evolutions are simulated from hydrodynamic and energy conservation equations. Modelling is used for analyzing the interaction of a near-infrared ultrafast laser pulse (45 fs, 800 nm, 200 mJ/cm2) with two distinct systems : a 100nm gold nanoparticle and a 10x41 nm2 gold nanorod. The gold nanoparticle shows a plasmon resonance at a ˜550 nm wavelength, and is thus slightly off-resonance at the 800 nm irradiation wavelength. In opposition, the gold nanorod shows a plasmon resonance directly at 800 nm and is thus in-resonance at the irradiation wavelength. The system of tightly coupled time-dependant non-linear partial differential equations is solved in 3D using a finite-element method. The modelling shows the generation of vapor bubble around both systems, which maximal diameter and growth time are validated from spectroscopic measurements. Results show an important production of plasma in the nanostructure's near field, which fast relaxation heats rapidly the surrounding water, leading to the emission of strong pressure wave and to the formation of a vapor bubble. Simulations further demonstrate the crucial importance of the plasma in the cavitation mechanism. For both the nanoparticle and the nanorod, results show that most of the laser energy is indeed absorbed in the plasma surrounding the nanostructure rather than in the nanostructure itself. In particular, the energy absorbed in the nanoparticle is shown to be insufficient to induce the formation of a vapor bubble at 200 mJ/cm2, whereas such a bubble is experimentally observed. This is a major result of the thesis, as such a plasma-mediated plasmonic enhanced cavitation mechanism has never been reported in the literature. The existence of this plasma-mediated mechanism that does not rely on the particle extreme heating to initiate cavitation has important consequences on cell nanosurgery applications. Finally, based on the same modelling, we develop a simple and efficient method to evaluate the potential of specific nanostructures and irradiation parameters for cell nanosurgery. We introduce a performance factor based on minimizing the energy density deposited in the nanostructure to avoid fragmentation, while maximizing the overall energy deposited in the system, to enhance the production of vapor bubbles. Results predict off-resonance 175 nm gold nanoparticles to be best suited for near-infrared ultrafast laser cell nanosurgery using 45 fs pulses at a wavelength of 800 nm. They also confirm the low inte

  13. Toxicological and biochemical analysis of the susceptibility of sylvatic Triatoma infestans from the Andean Valley of Bolivia to organophosphate insecticide

    PubMed Central

    Santo-Orihuela, Pablo Luis; Carvajal, Guillermo; Picollo, María Inés; Vassena, Claudia Viviana

    2013-01-01

    To increase our knowledge of the natural susceptibility of Triatoma infestans to an organophosphate insecticide, we performed toxicological and biochemical studies on three sylvatic populations from Bolivia and two populations from domestic dwellings from Bolivia and Argentina. Fifty-per-cent lethal doses (LD50) were determined based on the topical application of fenitrothion on first instar nymphs and mortality was assessed at 24 h. Both type of populations exhibited LD50ratios significantly higher than 1 with a range of the values (1.42-2.47); the maximum value were found in a sylvatic (-S) population, Veinte de Octubre-S. Samples were biochemically analysed using a glutathione S-transferase activity assay. The highest significant activity was obtained for Veinte de Octubre-S and the lowest activity was obtained for the reference population (102.69 and 54.23 pmol per minute per mg of protein respectively). Two out of the three sylvatic populations (Veinte de Octubre-S and Kirus Mayu-S) exhibited significantly higher glutathione S-transferase activity than that of the reference population. Based on this analysis of the natural susceptibility of this organism to organophosphate insecticides, continental and focal surveys of organophosphate susceptibility should be conducted to evaluate the evolution and distribution of this phenomenon. PMID:24037203

  14. En la búsqueda de características en eyecciones coronales de masa que discriminen entre dos paradigmas físicos en modelos de ECMs

    NASA Astrophysics Data System (ADS)

    Paissan, G.; Stenborg, G.; Rovira, M.

    Se conocen tres diferentes fenómenos de gran escala que ocurren en la atmósfera solar, denominados eyecciones coronales de masa (ECMs), protuberancias eruptivas y grandes fulguraciones de dos bandas. Estos fenómenos están estrechamente relacionados y podrían ser distintas manifestaciones de un único proceso físico. Las ECMs son definidas como eyecciones de gran escala de masa y flujo magnético desde la baja corona al espacio interplanetario. Desde su descubrimiento en los '70, muchos modelos han sido propuestos para explicar su origen y evolución. La explicación física de las ECMs es un tema de debate intenso. No obstante, los modelos pueden sintetizarse en dos grandes grupos: 1) los modelos de inyección de flujo y 2) los modelos de almacenamiento y liberación. En este trabajo, se presentan los estudios realizados con una serie de eventos observados con el coronógrafo MICA (Mirror Coronograph for Argentina), el telescopio en H-alfa HASTA (H-alpha Solar Telescope for Argentina) y los coronógrafos C2 y C3 de la sonda SOHO (Solar and Heliospheric Observatory). Los eventos que pudieron ser identificados como ECMs son contrastados dentro del esquema de los dos paradigmas teóricos propuestos.

  15. La preparacion del maestro y la interaccion entre maestro y nino en programas preescolares (Teacher Preparation and Teacher-Child Interaction in Preschools). ERIC Digest.

    ERIC Educational Resources Information Center

    Kontos, Susan; Wilcox-Herzog, Amanda

    It is generally agreed that because so much basic early learning occurs through interactive experiences when children are very young, the quality of teacher-child interactions contributes substantially to effects of group care and preschool education on children. Thus it is important to know if specialized teacher education in early childhood…

  16. Transitioning to new child-care nutrition policies: nutrient content of preschool menus differs by presence of vegetarian main entrée.

    PubMed

    Turner-McGrievy, Gabrielle M; Hales, Sarah B; Baum, Angela C

    2014-01-01

    Children who attend child care outside the home may be at increased risk for developing obesity. In 2012, the South Carolina ABC Child Care program issued new standards for food and nutrition. The goal of our study (conducted June to December 2012) was to examine changes that occurred at a large, Columbia, SC, preschool during the implementation of the South Carolina ABC Child Care program standards using an observational design, including a survey of parents and nutrient analysis of menus. The nutrition content of menu items before (n=15 days; six of which were vegetarian) and after (n=15 days; six of which were vegetarian) implementation of the new standards was compared. In addition, parents (N=75) were surveyed to examine opinions and support for the changes. Independent samples t tests were used to compare nutrient values before and after menu changes and analysis of variance was used to compare pre- and post-change vegetarian menus and pre- and post-change nonvegetarian menus. There were no significant differences between before and after menus with the exception of a 0.3 cup/day increase in vegetables (P<0.05). Vegetarian menus after the revisions were significantly higher in fiber (13 ± 3 g) than postrevision nonvegetarian menus (11 ± 3 g; P<0.05) and lower in sodium (1,068 ± 207 mg) than postrevision nonvegetarian menus (1,656 ± 488 mg; P<0.05). Standards that received the most parental support were serving at least two vegetables (score of 8.7 on a scale of one to nine) and two fruits per day (score of 8.6) and implementing policies against staff using food as a reward or punishment (score of 8.6). The center-specific policy of only bringing healthy foods for celebrations received the lowest support (score of 5.8). Adding more vegetarian menu items has the potential to improve the nutrient content of menus while keeping energy intake, saturated fat, sodium, and cholesterol levels at a more optimum level. PMID:24144990

  17. Etude comparative entre l'astrolabe dit "carolingien" et l'astrolabe d'Abù-Bakr ibn Yusuf de Toulouse.

    NASA Astrophysics Data System (ADS)

    D'Hollander, R.

    This article is a comparative study that is essentially technical. It is based on very careful measurements of an accuracy of up to one tenth of a millimetre carried out on the plates and retes of the two astrolabes examined by the writer. Abù-Bakr ibn Yusuf's astrolabe is in the Musée Paul Dupuy in Toulouse. It was made in 1216-17 in Marrakech.

  18. Relationship between Emotional Intelligence and Mental Health in School Counselors (Relación entre Inteligencia Emocional y salud mental en Orientadores Educativos)

    ERIC Educational Resources Information Center

    Cejudo, Javier

    2016-01-01

    Introduction: The purpose of the present research is aimed at studying the relationship between emotional intelligence as an ability and emotional intelligence as a trait and mental health of a sample of school counsellors. Method: The sample has been made up of 203 school counsellors. The instruments used have been: Mayer-Salovey-Caruso Emotional…

  19. Psychological Correlates of the Transmission and Acceptance of Rumors about AIDS = Correlates Psychologiques Entre la Transmission et l'Acceptation des Rumeurs sur le SIDA.

    ERIC Educational Resources Information Center

    Kimmel, Allan J.

    Public reactions to the Acquired Immune Deficiency Syndrome (AIDS) crisis are accompanied by the sorts of emotional and cognitive factors that have been identified by researchers as predictors of rumor generation and transmission. The present investigation attempted to ascertain the extent that various subjective factors (including anxiety,…

  20. Uma comparação entre técnicas de propagação de erros em astrofísica: Monte Carlo x Bootstrap

    NASA Astrophysics Data System (ADS)

    Waelkens, A. H.; Janot Pacheco, E.

    2003-08-01

    Recentemente Dhillon & Watson (2001) criticaram o procedimento de determinação de erros via simulações de Monte Carlo no caso do imageamento indireto de estrelas, por introduzir ruído nos dados e resultar em erros superestimados. Estes autores propuseram a utilização alternativa do método de Bootstrap como uma técnica superior para a estimativa de erros. Neste trabalho apresentamos os resultados de um estudo comparativo da performance das técnicas de simulação por Monte Carlo e por Bootstrap para a determinação de erros em duas situações de interesse: (i) ajuste de modelos a espectros observados e (ii) imageamento indireto de discos de acréscimo com técnicas de mapeamento por eclipse. No caso (i), os dados de entrada são espectros de emissão simples de hidrogênio aos quais é adicionado ruído gaussiano de amplitude selecionada. No caso (ii), são produzidas curvas de luz do eclipse de uma distribuição de brilho seguindo a lei TµR-3/4 para discos estacionários cuja taxa de acréscimo varia ao longo do eclipse segundo uma distribuição gaussiana de amplitude selecionada, simulando o ruído. A avaliação da performance é feita com o auxílio de um diagrama do erro relativo na grandeza ajustada, conforme obtido por cada método, versus o erro relativo (ruído/sinal) dos dados de entrada. O estudo mostra que as duas técnicas produzem resultados semelhantes nos dois casos, e que a suposta superioridade do método de Bootstrap não se confirma.

  1. Origine physique du contraste entre activité électrique au dessus des terres et des océans

    NASA Astrophysics Data System (ADS)

    Williams, Earle; Stanfill, Sharon

    2002-12-01

    New tests and older ideas are explored to understand the origin of the pronounced contrast in lightning between land and sea. The behavior of islands as miniature continents with variable area supports the traditional thermal hypothesis over the aerosol hypothesis for lightning control. The substantial land-ocean contrast in updraft strength is supported globally by TRMM (Tropical Rainfall Measuring Mission) radar comparisons of mixed phase radar reflectivity. The land-ocean updraft contrast is grossly inconsistent with the land-ocean contrast in CAPE (Convective Available Potential Energy), from the standpoint of parcel theory. This inconsistency is resolved by the scaling of buoyant parcel size with cloud base height, as suggested by earlier investigators. Strongly electrified continental convection is then favored by a larger surface Bowen ratio, and by larger, more strongly buoyant boundary layer parcels which more efficiently transform CAPE to kinetic energy of the updraft in the moist stage of conditional instability. To cite this article: E. Williams, S. Stanfill, C. R. Physique 3 (2002) 1277-1292.

  2. Relación física entre el cúmulo abierto Hogg 15 y la estrella Wolf-Rayet WR 47

    NASA Astrophysics Data System (ADS)

    Piatti, A. E.; Bica, E.; Santos, J. F. C., Jr.; Clariá, J. J.

    We revise the fundamental parameters of the faint open cluster Hogg 15, for which two recent colour-magnitude diagram (CMD) studies have obtained significantly different ages (Sagar et al. 2001, MNRAS, 327, 23; Piatti & Clariá 2001, A&A, 370, 931). In the present study, we combine a series of methods trying to constrain age, together with other fundamental parameters. We employ spatial extractions to construct the CMDs, and the cluster integrated spectrum to compare the latter with those of templates of known age. For Hogg 15 we derive an age of (20 ± 10) Myr, a reddening of (1.10 ± 0.05) mag, and a distance of (3.1 ± 0.5) kpc. We conclude that the estimation of an older age in the study of Piatti & Clariá can be accounted for in terms of main sequence/turnoff curvature being blurred in the CMDs, an effect mainly caused by field contamination. To clarify the issue of whether the Wolf-Rayet star HDE 311884 (WR 47), known to be a WN6 + O5V binary system, is associated or not with Hogg 15, we discuss its fundamental parameters, particularly its distance. Based on the WR 47 spectrum and available photometry, we assume that the underestimated distance implied by the Hipparcos parallax (216 pc) is affected by its binary character. By comparing the WR 47 spectrum with those of WR stars of a similar type, we conclude that WR 47 is not affected by a E(B-V) colour excess much higher than that associated with Hogg 15, namely E(B-V) = 1.10. On the basis of the WR 47's resulting distance of (5.2 ± 0.9) kpc, which largely surpasses that of the cluster, we conclude that WR 47 is not related to Hogg 15 from the point of view of origin, since the cluster and the star do not belong to the same formation event.

  3. Vinculación Física entre Super Cáscaras de Hidrógeno Neutro y Formación Estelar Reciente

    NASA Astrophysics Data System (ADS)

    Corti, M. A.; Arnal, E. M.

    Many of the known galactic HI supershells (SCHI) may have been formed by the combined effects of stellar winds and supernovae explotions. Having most of them dynamic lifetimes of a few times 10^7 yr, these huge structures are likely to outlive the stars that gave rise to them. Hence, these SCHI may be used as fossil records of the Milky Way star formation history. Furthermore, along their evolution SCHI may trigger star formation. In this paper we analyze the genetic link put forward by McClure-Griffiths et al. (2002) between the OB association Cen OB1 and the SCHI GSH305+01-24. From our study we conclude that GSH305+01-24 may not represent a real physical structure. Instead, we believe that this structure is best represented by two unrelated huge HI shells. The role played by Cen OB1 in powering one of these HI shells is unclear for the time being. FULL TEXT IN SPANISH.

  4. Denomination et categorisation des modeles d'enseignement des langues: entre institution et pratique (Denomination and Categorization of Language Teaching Models: Between Institution and Practice).

    ERIC Educational Resources Information Center

    Gajo, Laurent; Matthey, Marinette

    1998-01-01

    The process and issues of labeling language program models is discussed insofar as it may affect the objectives, content, and method of instruction. The first section describes the origins, stated objectives, and implementation of a Neuchatel (Switzerland) school program integrating heritage language and culture into the school curriculum, noting…

  5. Entre dois mundos: vida quotidiana de criancas portuguesas na america [Between Two Worlds: The Daily Life of Portuguese Children in America].

    ERIC Educational Resources Information Center

    de Meneses, Fernando

    This Portuguese reader with accompanying teacher's guide describes the culture shock that Portuguese children and their families face when they immigrate to North America. The reader is divided into 75 short stories about the families that come from the rural areas of Portugal where there has been little industrialization. The purpose of the…

  6. Modelo Crosscultural de Pasantias para Lideres de la Educacion: Cooperacion entre Estados Unidos y Venezuela (Designing an Effective School Administrator Internship Program: United States and Venezuela Cooperation).

    ERIC Educational Resources Information Center

    Serafin, Ana Gil; Thompson, Eugene W.

    A model was developed of an internship program designed to give valuable cross-cultural experience to school administrators in training at universities in the United States and Venezuela. A naturalistic approach was used to develop the model. Leading school administrators and educational leadership theorists in both countries were interviewed by…

  7. Etude, par principes premiers, des effets de la correlation entre electrons sur les proprietes electroniques et magnetiques de polymeres pontes et de supraconducteurs a haute temperature critique

    NASA Astrophysics Data System (ADS)

    Pesant, Simon

    Description of complex systems by Density functional theory is treated in this thesis. First, the Density functional theory and a few functionals used to simulate cristals are presented. Specifically, the LDA and GGA functionnals are described and their limits are exposed. Furthermore, the Hubbard model as well as the LDA+U functionnal are addressed in this chapter. These methods enable the study of highly correlated materials. Then, results obtained on polymers are summarized in two articles. The first one treats the band gap variation of ladder-type polymers compared to non ladder type ones. The second article considers small band gap polymers. In this case, it will be shown that an hybrid functional, which contains exact exchange, is required to describe the electronic properties of the polymers under study. Finally, the last chapter address the study of cuprates superconductors. The LDA+U can account for the localization of electrons in copper orbitals. Consequently, a study of the impact of this functionnal on electronic properties of cuprates is conducted. The chapter is ended by an article treating magnetic orders in doped La 2CuO4. Supplementary materials of the second article and a description of the theory of superconductivity of Bardeen, Cooper and Schrieffer are put in annex. Keywords : Electronic correlation, DFT, LDA+U, cuprates, polymers, magnetic orders

  8. Mise en évidence de fortes circulations verticales temporaires entre zones humides et aquifères alluviaux et régionaux

    NASA Astrophysics Data System (ADS)

    Weng, Philippe; Coudrain-Ribstein, Anne; Kao, Cyril; Bendjoudi, Hocine; Marsily, Ghislain de

    1999-08-01

    Tensiometric and piezometric values were recorded in an alluvial valley of the Seine wetland from February to November 1998. As a consequence of two flood events, the groundwater head once rose above the soil surface. When the water level in the Seine decreased, the vertical hydraulic gradient between the underlying Senonian chalk and the alluvia increased to 16 %o. During the few days of recession the alluvial wetlands were fed by an upward flow from the regional chalk aquifer and drained towards the river through a more permeable alluvial layer (1.5 m to 7 m below soil surface).

  9. Associação entre lipid accumulation product (LAP) e hirsutismo na síndrome do ovário policístico.

    PubMed

    Oliveira, Flávia Ribeiro de; Rezende, Mariana Bicalho; Faria, Nícolas Figueiredo; Dias, Tomás Ribeiro Gonçalves; Oliveira, Walter Carlos Santos de; Rocha, Ana Luiza Lunardi; Cândido, Ana Lúcia

    2016-02-01

    Objective Polycystic ovary syndrome (PCOS) is the most common endocrine metabolic disorder in women between menarche and menopause. Clinical hyperandrogenism is the most important diagnostic criterion of the syndrome, which manifests as hirsutism in 70% of cases. Hirsute carriers of PCOS have high cardiovascular risk. Lipid accumulation product (LAP) is an index for the evaluation of lipid accumulation in adults and the prediction of cardiovascular risk. The aim of this study was to evaluate the association between LAP and hirsutism in women with PCOS. Methods This was a cross-sectional observational study of a secondary database, which included 263 patients who had visited the Hyperandrogenism Outpatient Clinic from November 2009 to July 2014. The exclusion criteria were patients without Ferriman-Gallwey index (FGI) and/or LAP data. We used the Rotterdam criteria for the diagnosis of PCOS. All patients underwent medical assessment followed by measurement and recording of anthropometric data and the laboratory tests for measurement of the following: thyroid-stimulating hormone, follicle-stimulating hormone, prolactin, total testosterone, sex hormone binding globulin, 17-α-hydroxyprogesterone (follicular phase), glycohemoglobin A1c, and basal insulin. In addition, the subjects underwent lipid profiling and oral glucose tolerance tests. Other laboratory measurements were determined according to clinical criteria. LAP and the homeostatic model assessment index (HOMA-IR) were calculated using the data obtained. We divided patients into two groups: the PCOS group with normal LAP (< 34.5) and the PCOS group with altered LAP (> 34.5) to compare the occurrence of hirsutism. For statistical analysis, we used SPSS Statistics for Windows® and Microsoft Excel programs, with descriptive (frequencies, percentages, means, and standard deviations) and comparative analyses (Student's t-test and Chi-square test). We considered relations significant when the p-value was ≤ 0.05. Results LAP was high in most patients (n = 177; 67.3%) and the FGI indicated that 58.5% of the patients (n = 154) had hirsutism. The analysis by LAP quartiles showed a positive correlation (p = 0.04) among patients with a high FGI and an upper quartile LAP (> 79.5) when compared with those with LAP < 29.0 (lower quartile). Conclusion This study demonstrated an association between high LAP and hirsutism. The FGI could represent a simple and low-cost tool to infer an increased cardiovascular risk in women with PCOS. PMID:26909772

  10. L'Alternance entre les auxiliaires "avoir" et "etre" en francais parle a Montreal (Alternation between the Auxiliaries "Avoir" and "Etre" in Spoken French in Montreal)

    ERIC Educational Resources Information Center

    Sankoff, Gillian; Thibault, Pierrette

    1977-01-01

    A study of the spoken French of 120 residents of Montreal. The researchers were interested in the linguistic and social factors influencing the use of "avoir" and "etre." Results show that this usage corresponds to a tendancy to regularize conjugations. (Text is in French.) (AMH)

  11. Entre dicho y hecho ...: An Assessment of the Application of Research from Second Language Acquisition and Related Fields to the Creation of Spanish CALL Materials for Lexical Acquisition

    ERIC Educational Resources Information Center

    Lafford, Barbara A.; Lafford, Peter A.; Sykes, Julie

    2007-01-01

    Despite the problems presented by lexical errors in second language (L2) communication, most computer assisted language learning (CALL) programs tend to focus on the acquisition of grammar points rather than on the development of the L2 lexicon. In addition, CALL vocabulary tasks are typically limited in scope and mechanical in nature, covering…

  12. Católicos, fidelidade conjugal e AIDS: entre a cruz da doutrina moral e as espadas do cotidiano sexual dos adeptos1

    PubMed Central

    Rios, Luis Felipe; de Aquino, Francisca Luciana; Muñoz-Laboy, Miguel; Oliveira, Cinthia; Parker, Richard

    2009-01-01

    Neste artigo discutimos a visão da Igreja Católica sobre sexualidade na interface com a epidemia do HIV/AIDS. Nossa reflexão está embasada em pesquisa etnográfica que envolveu dois meses de observação participante do cotidiano de católicos de um bairro popular da Região Metropolitana do Recife, além de contar com entrevistas a onze dos leigos engajados nos serviços religiosos da igreja do bairro e a oito sacerdotes que realizam seus trabalhos religiosos em outras localidades. Nelas abordamos diferentes temáticas relacionadas ao enfrentamento da epidemia da AIDS. Nesse contexto, conjugalidade e fidelidade se afiguram como importantes analisadores de como aqueles lidam com a epidemia, em uma variedade de re-descrições práticas e de re-interpretações conceptuais das assertivas do discurso moral religioso – ainda que, muitos impasses permaneçam em aberto em termos das prerrogativas da Igreja e seus possíveis rebatimentos na saúde sexual dos adeptos. PMID:21765650

  13. Relación entre la orientación de Nebulosas Planetarias y el campo magnético galáctico

    NASA Astrophysics Data System (ADS)

    Weidmann, W.; Díaz, R. J.; Carranza, G.

    Un estudio detallado de las orientaciones diferenciales de nebulosas planetarias en todo el cielo sugiere fuertemente una relación con la dirección de los campos magnéticos de origen galáctico, determinados en la polarización de estrellas de campo. Esto da consistencia a la hipótesis de que la orientación de las nebulosas planetarias ovaladas es inducida, al menos parcialmente, por el campo magnético general de la Vía Láctea.

  14. Previniendo el Uso de Drogas entre Ninos y Adolescentes: Una Guia Basada en Investigaciones (Preventing Drug Use among Children and Adolescents: A Research-Based Guide).

    ERIC Educational Resources Information Center

    Sloboda, Zili; David, Susan L.

    This question and answer guide provides an overview of the research on the origins and pathways of drug abuse, the basic principles derived from effective drug abuse prevention research, and the application of research results to the prevention of drug use among young people. The basic principles derived from drug abuse prevention research are…

  15. Thriving Together: Connecting Rural School Improvement and Community Development = Prosperando juntos: La conexion entre el mejoramiento de la escuela rural y el desarrollo comunitario.

    ERIC Educational Resources Information Center

    Boethel, Martha

    Available in English or Spanish, this resource guide aims to help rural schools and communities learn ways of supporting each other so that both can thrive. Background information and basic tools are provided for starting a joint school-community development effort. Chapters contain: (1) outline of the guide and statement of beliefs about…

  16. The Effect of Low Dose Irradiation and Grapefruit Extract on C. perfringens Growth from Spores in sous vide Processed Pork-Based Mexican Entrée

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Sous vide, a common cooking method for meat and poultry products is widely used for providing ready-to-eat meals. Traditionally, these products have limited shelf life, ranging from 2 to 3 weeks. However, similar products may be stored for longer periods in the U.S. and other countries, requiring ad...

  17. Make the Reading-Writing Connection: Tips for Parents of Young Learners = Haga el enlace entre lectura y escrita: Consejos para padres de jovenes que estan aprendiendo.

    ERIC Educational Resources Information Center

    International Reading Association, Newark, DE.

    This brochure offers parents tips on helping their children connect writing with reading. It begins by noting that preschool children often want to scribble on paper, scribbles which sometimes represent a story. It suggests making space in the home for literacy, and encouraging early efforts. The brochure then offers four brief activities for…

  18. L'espace du mouvement: Une analyse des conflits dans les interactions entre institutrice et eleves d'une ecole maternelle

    NASA Astrophysics Data System (ADS)

    Galvão, Izabel

    1995-01-01

    The research described in this article, winner of the Gottfried Hausmann Prize for 1994, was carried out in a kindergarten in São Paolo, Brazil, using the theory developed by Henri Wallon. The aim was to examine how primary school children are affected in their development by: (a) unnecessary restrictions placed on their physical movements during lessons; and (b) failure to organize the classroom space in a way that assists the learning process. The author concludes that these factors lead to tensions in the classroom which could be avoided through a different approach to movement and space.

  19. Contribution à l'analyse des inter-relations entre activités humaines et variabilité climatique : cas du Sud forestier ivoirien

    NASA Astrophysics Data System (ADS)

    Yao, Télésphore Brou; Servat, Eric; Paturel, Jean-Emmanuel

    1998-12-01

    The South Ivorian Forest has suffered a large rainfall deficit for 25 years. At the same time, it has been noticed that the movement of the coffee and cocoa production seems concomitant with that of the isohyets during recent decades. The variations in albedo and rainfall gradient seem to be linked to the significant changes to the forest cover. These could affect precipitation locally.

  20. Analysing deltamethrin susceptibility and pyrethroid esterase activity variations in sylvatic and domestic Triatoma infestans at the embryonic stage

    PubMed Central

    Santo-Orihuela, Pablo Luis; Carvajal, Guillermo; Picollo, María Inés; Vassena, Claudia Viviana

    2013-01-01

    The aim of the present work was to study the deltamethrin susceptibility of eggs from Triatoma infestans populations and the contribution of pyrethroid esterases to deltamethrin degradation. Insects were collected from sylvatic areas, including Veinte de Octubre and Kirus-Mayu (Bolivia) and from domiciliary areas, including El Palmar (Bolivia) and La Pista (Argentina). Deltamethrin susceptibility was determined by dose-response bioassays. Serial dilutions of deltamethrin (0.0005-1 mg/mL) were topically applied to 12-day-old eggs. Samples from El Palmar had the highest lethal dose ratio (LDR) value (44.90) compared to the susceptible reference strain (NFS), whereas the Veinte de Octubre samples had the lowest value (0.50). Pyrethroid esterases were evaluated using 7-coumaryl permethrate (7-CP) on individually homogenised eggs from each population and from NFS. The El Palmar and La Pista samples contained 40.11 and 36.64 pmol/min/mg protein, respectively, and these values were statistically similar to NFS (34.92 pmol/min/mg protein) and different from Kirus-Mayu and Veinte de Octubre (27.49 and 22.69 pmol/min/mg protein, respectively). The toxicological data indicate that the domestic populations were resistant to deltamethrin, but no statistical contribution of 7-CP esterases was observed. The sylvatic populations had similar LDR values to NFS, but lower 7-CP esterase activities. Moreover, this is the first study of the pyrethroid esterases on T. infestans eggs employing a specific substrate (7-CP). PMID:24402155

  1. [Acquired immunodeficiency syndrome in pediatric patients].

    PubMed

    Molina Moguel, J L; Ruiz Illezcas, R; Forsbach Sánchez, S; Carreño Alvarez, S; Picco Díaz, I

    1990-12-01

    The object of this study was to determine how many of the patients treated at the Pediatric Odontology Clinic, a branch of the Maxillo-Facial Surgery Service at the Veinte de Noviembre Regional Hospital, ISSSTE, are VIH-positive of show serious manifestations of Acquired Immuno-Deficiency Syndrome (AIDS). For such purpose, 100 pediatric patients suffering from different systemic or local diseases were evaluated, the most common being hematological alterations. Results evidenced the presence of VIH in the blood of five of the pediatric subjects, all suffering from Hemophilia. PMID:2132469

  2. Como ayudar a su hijo a tener exito en la escuela, con actividades para ninos entre las edades de 5 a 11 anos (Helping Your Child Succeed in School, with Activities for Children Ages 5 through 11).

    ERIC Educational Resources Information Center

    Paulu, Nancy

    At the heart of the No Child Left Behind Act of 2001 is a promise to raise standards for all children and to help all children meet those standards. This Spanish-language booklet provides information that parents can use to help their child succeed in school. Following an introduction, the second section of the booklet, "The Basics," offers…

  3. Vinculacion Entre La Educacion Y El Mundo Del Trabajo: Informe Final. (Coloquio Regional Caracas, Venezuela, Septiembre 2-6, 1985) = The Linkage Between Education and Employment: Final Report of the Regional Colloquium (Caracas, Venezuela, September 2-6, 1985).

    ERIC Educational Resources Information Center

    United Nations Educational, Scientific, and Cultural Organization, Santiago (Chile). Regional Office for Education in Latin America and the Caribbean.

    At this regional colloquium 13 papers were presented concerning the relationship between education and employment. Themes addressed were: (1) the transformation of the workplace by technology and science; (2) the future of the disadvantaged population as a consequence of the technological revolution; and (3) the resulting changes in the education…

  4. The Differences between Spoken and Written Grammar in English, in Comparison with Vietnamese (Las Diferencias entre la Gramática Oral y Escrita del Idioma Inglés en Comparación con el Idioma Vietnamita)

    ERIC Educational Resources Information Center

    Thanh, Nguyen Cao

    2015-01-01

    The fundamental point of this paper is to describe and evaluate some differences between spoken and written grammar in English, and compare some of the points with Vietnamese. This paper illustrates that spoken grammar is less rigid than written grammar. Moreover, it highlights the distinction between speaking and writing in terms of subordination…

  5. Teacher Collaboration Praxis: Conflicts, Borders, and Ideologies from a Micropolitical Perspective (La práctica colaborativa entre docentes: conflictos, fronteras e ideologías desde una perspectiva micropolítica)

    ERIC Educational Resources Information Center

    Keranen, Nancy; Encinas Prudencio, Fátima

    2014-01-01

    This paper looks at a feature of teacher collaboration within Achinstein's (2002) micropolitics of collaboration but from an intrapersonal perspective. Results discussed feature issues of conflict, borders, and ideologies within each participating teacher rather than between teachers. Unresolved or unacknowledged intrapersonal conflict might lead…

  6. Suivis temporels comparés de la structure thermique d'eaux côtières libanaises (Batroun) et françaises (Marseille) entre juin 1999 et octobre 2002

    NASA Astrophysics Data System (ADS)

    Abboud-Abi Saab, Marie; Romano, Jean-Claude; Bensoussan, Nathaniel; Fakhri, Milad

    2004-11-01

    Vertical temperature profiles were recorded from June 1999 to October 2002 (at least once a month) at two Mediterranean sites, in the eastern basin (Batroun, Lebanon; 0-100 m) and in the northwestern basin (Marseilles, France; 0-55 m). At the two sites, the thermal seasonal evolution and the thermocline time dynamics are quite identical. But in the Lebanese waters, at comparable water depths, temperatures are currently 4 to 5 °C higher than in the French waters, the thermocline is longer (more than 6 months), permanent and deeper (40-50 m) than in Marseilles (20-30 m). The latter frequently disappears in summer due to northwest winds inducing cold waters. This is principally due to differences in prevailing wind regimes at each site. Such evaluation, coupled with long-term observations of temporal evolution of coastal water at the regional level of the Mediterranean basins, will shed light on temperature regime fluctuations and their consequences in the context of global warming of the Mediterranean. To cite this article: M. Abboud-Abi Saab et al., C. R. Geoscience 336 (2004).

  7. Vinculos Entre la Capacitacion de Docentes y el Desarrollo de Materiales Educativos Impresos--Anotaciones para Una Discusion (Links between In-service Teacher Training and the Development of Printed Educational Aids).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Textbooks and other printed materials will be ever present, in the foreseeable future, as major aids for teaching and learning processes. New textbooks imply new guidelines for teachers, and the ways to handle such guidelines demand teacher training. This paper explains some links between inservice teacher training programs and the development of…

  8. Adequation between environmental shifts and human speciations during the Plio-PleistoceneAdéquation entre changements environnementaux et spéciations humaines au Plio-Pléistocène

    NASA Astrophysics Data System (ADS)

    Zeitoun, Valery

    2000-01-01

    Several synthetic studies provide evidence of faunistic and floristic shifts as consequences of global climatic events around 2.5 and 1.8 Ma. Some authors are more confident in the role played by local tectonic events to explain such a change in terms of vicariance. It is possible that astronomic, tectonic and climatic variations are linked, as the lithosphere is a catalyst for biosphere more or less strong according to the period. The purpose of this paper is to confront independent environmental and anatomical data to try to understand the evolutionary process in hominids, with particular emphasis on species of the genus Homo in East Africa during the Plio-Pleistocene period. Thus the result of a cladistic analysis based on 35 Otus and 468 features of the calvaria is showing the onset of at least four species to describe the grade of Homo habilis, living in East Africa. The radiation is congruent with the contemporaneous environmental shifts around 2.5 Ma, as is also the case for bovids or cercopithecids. Some Homo erectus left Africa when another climatic pulse happened around 1.8 Ma.

  9. Relaciones hidrogeologicas y medioambientales entre el mar mediterraneo, El saladar y el acuifero de agua amarga (provincia de alicante). Incidencia de las explotaciones de las desaladoras de alicante I Y II Y medidas correctoras

    NASA Astrophysics Data System (ADS)

    Manteca, Ivan Alhama

    The Agua Amarga coastal aquifer, located in the south of Alicante province, has been subjected to successive anthropogenic actions: salt works activity (1925-1975) and water withdrawal to supply the Alicante I and II desalination plants (since 2003). These interventions have influenced the salinity and the flow regime. Due to the existence of a salt marsh of ecological interest linked to the aquifer, the 'Mancomunidad de los Canales del Taibilla' (agency responsible for the desalination plants) designed a piezometric network for monitoring piezometry and electrical conductivity (in operation since May 2008). Soil humidity and piezometrics levels have been recovered by means of a seawater pouring programme over the salt marsh (since December 2009),which represents the third anthropic intervention. In this memoria, we investigate the Agua Amarga coastal aquifer to develop a physical conceptual model. Firstly, the study area is characterized in relation to climatology, geology, geomorphology and hydrogeology, using published information, describing, in addition, the desalination plants catchment system. Next, based on hydrogeological studies prior to the start up of the desalination plants, the aquifer is characterized: type, lithology, hydraulic parameters, thickness, surface extension, etc. Water quantity relating to rainfall, water withdrawal and pourings over the salt marsh, have been integrated in conjunction with data from monthly piezometric campaigns. In adittion, in order to gain insight into the groundwater mixing processes, chemical and isotope analyses were carried out on meteoric water and groundwater samples taken at different locations. The results were used to elaborate a conceptual physical model and a water budget. As an extension tool to understand processes and assess aquifer management, a 3-D fluid-flow and solute-transport model is designed with SEAWAT. Also, the 2-D physical characterization of scenarios with seawater intrusion and salt flats is presented. Finally, after describing ecological values of the salt marsh, the effect of the seawater pouring programme on aquifer piezometry and salinity is studied, assessing the possibility of applying this pilot scheme to other scenarios.

  10. Les "petits mots" de coordination: etude diachronique de leur apparition chez quatre enfants entre 3 et 4 ans (The "Little" Coordinating Words: A Diachronic Study of Their Appearance in Four Children, ages 3-4)

    ERIC Educational Resources Information Center

    Chambaz, Marcelle; And Others

    1975-01-01

    Reports on a diachronic study concerning the syntactic phenomena of coordination and subordination and their place in language acquisition. The organization and evolution of the coordination system of 4 children, ages 3-6 was studied. The need for investigation of adult speech for further understanding acquisition is stressed. (Text is in French.)…

  11. Etude de l'interface entre le profil psycho-spirituel des futurs maitres et le developpement psychosocial (Study of the Relationship between the Psycho-Spiritual Profile of Future Teachers and Their Psycho-Social Development).

    ERIC Educational Resources Information Center

    Michaud, Claude

    1996-01-01

    Describes a study examining the spiritual experiences among young adults in Ontario to help inform efforts to revise teacher education programs in Canada. Highlights the diversity of subjects' spiritual experiences and describes three typologies of individual spiritual development. Reviews the roles of the church, university, and school in teacher…

  12. Predictive Relationship between Humane Values of Adolescents Cyberbullying and Cyberbullying Sensibility (Relaciones predictivas entre los valores humanos de los adolescentes, el acoso cibernético y la sensibilidad al acoso cibernético)

    ERIC Educational Resources Information Center

    Dilmac, Bülent; Yurt, Eyüp; Aydin, Mustafa; Kasarci, Ismail

    2016-01-01

    Introduction: Cyberbullying has been more common than the traditional bullying in recent years. As with the traditional bullying, humane values likely to explain the reason why adolescents tend to bully via cyber-means. Cyber-bullying behaviors also reasoned by adolescents' sensibility towards it. This study investigates the predictive…

  13. Potencial de Seqüestro de Carbono Atmosférico entre Diferentes Cultivares de Milho (Zea mays L.) sob Condiç o de Déficit Hídrico

    Technology Transfer Automated Retrieval System (TEKTRAN)

    There is a question concerning the role of agricultural practices on carbon sequestration enhancement. By producing biomass with agricultural crops and adding this residue to soil, it should act on the mitigation process of the greenhouse effect, especially CO2. The objectives of this study were to ...

  14. Highlighting the Impacts of North-South Research Collaboration among Canadian and Southern Higher Education Partners (Principaux impacts des collaborations de recherche Nord-Sud entre les partenaires des etablissements d'enseignement superieur du Canada et du Sud)

    ERIC Educational Resources Information Center

    Association of Universities and Colleges of Canada, 2006

    2006-01-01

    The Association of Universities and Colleges of Canada (AUCC) felt it was timely to create an academic forum in which university researchers have the opportunity to engage with their peers and relevant stakeholders and document the impacts of their North-South research collaboration in a peer-reviewed publication. The Association achieved this by…

  15. Cinématique des failles entre les unités subbétiques pendant le Miocène (secteur central de la cordillère Bétique).

    NASA Astrophysics Data System (ADS)

    Galindo-Zaldívar, Jesús; Ruano, Patricia; Jabaloy, Antonio; López-Chicano, Manuel

    2000-12-01

    The kinematic analysis of the low-angle faults that separate the major units of the Subbetic Zone indicates two main stages of translations. In the first stage, of Burdigalian to basal Tortonian age, the hanging walls moved toward the WSW, and thrusts developed in some sectors of the External Zones. Simultaneously, in the Internal Zones, the activity of extensional detachments shows the same kinematics. In the second stage, affecting up to basal Tortonian rocks, northwest-verging thrusts were active. The Subbetic tectonic units probably underwent relative rotation during the development of these structures.

  16. A Comparison of Chinese and Colombian University EFL Students Regarding Learner Autonomy (Comparación entre estudiantes universitarios de inglés chinos y colombianos con respecto a su autonomía como aprendices)

    ERIC Educational Resources Information Center

    Buendía Arias, Ximena Paola

    2015-01-01

    This research seeks to gain deeper understanding of learner autonomy in English as a Foreign Language students from different cultures through the identification and analysis of similarities and differences between Chinese and Colombian students from two public universities: Tianjin Foreign Studies University in China and Universidad Surcolombiana…

  17. Corrélations entre propriétésélectriques et structurales de solutions solides de type fluorinea`exce`s d'anions: Essai de mode`lisation

    NASA Astrophysics Data System (ADS)

    Reau, J. M.; Senegas, J.; El Omari, M.

    1990-02-01

    In a fluoride ion excess CaF 2-type solid solution of formulation M 2+1-xM' 2+αxF 2+αx (α = 1, 2, 3) , the sum of the interstitial fluoride ions n F int and the sum of the vacancies in normal sites n □ can be represented according to general equations y = (mx 3 + λqx)(x 2 + q) : the m and λ parameters depend on structural features, and q is bound to electrical properties. This model allows one to correlate in a continuous way the composition dependence of electrical properties and the progressive extension of clusterization when the substitution rate increases.

  18. [The EMECAM project: a discussion of the results in the participating cities. Estudio Multicéntrico Español sobre la Relación entre la Contaminación Atmosférica y la Mortalidad].

    PubMed

    Ballester Díez, F; Sáez Zafra, M; Pérez-Hoyos, S; Daponte Codina, A; Bellido Blasco, J B; Cañada Martínez, A; Abad Díez, J M; Pérez Boíllos, M J; Alonso Fustel, M E; Taracido Trunk, M; Aguinaga Ontoso, I; Guillén Pérez, J J; Ordóñez Iriarte, J M; Saurina Canals, C; Tenías Burillo, J M

    1999-01-01

    This article draws a comparison and provides a discussion of the findings resulting from the local analyses of the 14 cities participating in the EMECAM Project. An analysis is made of the time series related to mortality, pollutants (particles in suspension, SO2, NO2, O3 and CO), temperature and other factors taken from records of public institutions. By using Poisson autoregressive regression, an estimate has been made of the short-term relationship between the number of deaths and the air pollution indicators in each one of the following cities: Barcelona, metropolitan area of Bilbao, Cartagena, Castellón, Gijón, Huelva, Madrid, Pamplona, Seville, Oviedo, Valencia, Vigo, Vitoria and Saragossa. The findings reveal the air pollution figures in our country to be similar to those of other European cities. The levels of the different pollutants point toward road traffic as being the main source of most of this pollution. A relationship has been found between the mortality and different pollutants in most cities, although the results are not homogeneous among the cities and show variability in the different causes under study. In some cities, especially in those having smaller populations, there have been no findings providing any evidence of a relationship, or the findings themselves are not highly consistent. The meta-analysis will provide estimates for all of the cities as a whole and will allow the possibility of making a more clear-cut assessment of the time lag impact of air pollution on the mortality. Worthy of special mention is the participation in this project of public health officers as actively involved researchers. PMID:10410614

  19. Repertoire de didacticiels de francais langue seconde ou etrangere publies entre 1980 et 1988 (List of Courseware for French as a Second or Foreign Language Published between 1980 and 1988). Publication K-11.

    ERIC Educational Resources Information Center

    H.-Lemonnier, France; And Others

    A listing of 97 items of courseware includes programs in seven categories, pertaining to: (1) vocabulary; (2) grammar; (3) verb conjugation; (4) syntax and/or morphosyntax; (5) reading and/or writing; (6) oral language; and (7) other areas of French second language instruction. Each citation includes the title, program type (e.g. drill, game),…

  20. Exploring Elementary Students' Power and Solidarity Relations in an EFL Classroom (Exploración de las relaciones de poder y solidaridad entre estudiantes de primaria en la clase de inglés como lengua extranjera)

    ERIC Educational Resources Information Center

    Méndez, Tatiana; García, Andrea

    2012-01-01

    This article derives from a critical discourse analysis study that reports the characteristics of elementary school students' power and solidarity relations in English as a foreign language classroom in Bogotá, Colombia, while we were doing our teaching English as a foreign language practicum. The study was based on theories of power and…

  1. Como ayudar a su hijo durante los primeros anos de la adolescencia: Para los padres con ninos entre las edades de 10 a 14 anos (Helping Your Child through Early Adolescence: For Parents of Children from 10 through 14).

    ERIC Educational Resources Information Center

    Paulu, Nancy

    Recognizing that parents and families can greatly influence the development of their 10- through 14-year-olds, this Spanish-language booklet is part of a national effort to provide parents with the latest research and practical information to help them support their children both at home and in school. The booklet is organized in 13 sections…

  2. La Desercion Escolar en los Niveles de Sexto y Noveno Grado: Una Comparacion Entre Zonas Rurales y Urbanas. Boletin 219 (The Educational Desertion in the 6th and 9th Grades: A Comparison Between Rural and Urban Zones. Bulletin 219).

    ERIC Educational Resources Information Center

    Lopez, Maria I. Hernandez; And Others

    In 1962 and again in 1965, a group of sixth and ninth grade students in selected schools in four Puerto Rican communities were interviewed to investigate the factors influencing students' decision to withdraw from school before completing twelfth grade and to identify some characteristics of dropouts. Of 616 students interviewed in 1962, 20.9% of…

  3. Le « Harcèlement Entre Pairs » À L'école élémentaire Tchèque: Une Question D'interprétation

    NASA Astrophysics Data System (ADS)

    Kohout-Diaz, Magdalena

    2008-07-01

    "PEER BULLYING" IN CZECH PRIMARY SCHOOLS: A QUESTION OF INTERPRETATION—This article questions adults' reports of an alleged increase in peer bullying at Czech primary schools. A survey on the school climate revealed that the pupils see it as a generally positive one and consider their relationships to be good. However, compared to France, their behaviour towards the adults is aggressive and rude. This apparent contradiction is linked to a conflict between the educational norms carried over from the old regime (behavioural control and conformism) and the new socio-economic paradigms (critical thinking and free enterprise). Public opinion, the media and a number of scientifically-questionable studies have drawn attention to the phenomenon of peer bullying ( šikana), and applied an imported concept to describe it ( school bullying). This makes it possible to avoid questioning the part played by the adults, the school and the researchers; justify segregating pupils from socially, culturally or economically disadvantaged backgrounds (Roma); and facilitate the country's socio-economic inclusion in the European Union by highlighting educational problems about whose nature there is general agreement.

  4. Pushing Too Little, Praising Too Much? Intercultural Misunderstandings between a Chinese Doctoral Student and a Dutch Supervisor (¿Empujando muy poco, felicitando demasiado? Malentendidos interculturales entre un estudiante de doctorado Chino y un supervisor Holandés)

    ERIC Educational Resources Information Center

    Hu, Yanjuan; van Veen, Klaas; Corda, Alessandra

    2016-01-01

    To understand the challenges and their causes in interactions between Western supervisors and international doctoral students, we conducted a self-study of our experiences as a Chinese international student and her Dutch supervisor during her doctoral research project. We found the supervisor and the student to differ in their expectations of the…

  5. Online Peer Feedback between Colombian and New Zealand FL Beginners: A Comparison and Lessons Learned (Retroalimentación virtual de pares entre aprendices principiantes de lengua de Colombia y Nueva Zelanda: una comparación y lecciones aprendidas)

    ERIC Educational Resources Information Center

    Tolosa, Constanza; Ordóñez, Claudia Lucía; Alfonso, Tania

    2015-01-01

    We report on an exploratory study comparing the performance as online tutors of two groups of beginner eleven-year-old students of English in Colombia and Spanish in New Zealand. The native speaker students of the foreign language the others were learning corrected paragraphs written by their peers. The feedback provided by each group of tutors…

  6. Parámetros astrofísicos fundamentales de 6 cúmulos de la Nube Mayor de Magallanes en el rango de transición entre 200 y 700 millones de años

    NASA Astrophysics Data System (ADS)

    Piatti, A. E.; Bica, E.; Geisler, D.; Clariá, J. J.

    Complementing our recent Washington photometric studies on intermediate age and young Large Magellanic Cloud (LMC) clusters, we present in this work new results for 6 previously unstudied star clusters in the transition range 200-700 Myr. We study NGC 1836, NGC 1860 and NGC 1865, which are projected on the LMC bar; SL 444, also located in the central disc but outside the bar, and LW 224 and SL 548, both located in the outer disc. We derive ages and metallicities from extracted T1 versus C-T1 colour-magnitude diagrams (CMDs), using theoretical isochrones recently computed for the Washington system. For the metallicity determinations, these CMDs are particularly sensitive. We also estimate ages and metallicities of the surrounding fields of NGC 1860 and NGC 1865 by employing the δT1 index and theoretical isochrones.

  7. Positive Prevention: Successful Approaches To Preventing Youthful Drug and Alcohol Use [and] La Prevencion Positiva: Metodos que han tenido exito en la prevencion del uso de drogas y alcohol entre la juventud.

    ERIC Educational Resources Information Center

    American Association of School Administrators, Arlington, VA.

    The United States has the highest rate of youthful drug abuse of any industrialized country in the world. There is a growing awareness that drug and alcohol use are closely connected to other problems such as teenage suicide, adolescent pregnancy, traffic fatalities, juvenile delinquency, poor school performance, runaways, and dropouts. Youthful…

  8. Conséquences de l'interaction entre préférences pour l'habitat et quantité de ressources trophiques sur les communautés d'insectes coprophages (Coleoptera: Scarabaeoidea)

    NASA Astrophysics Data System (ADS)

    Kadiri, Nassera; Lobo, Jorge M.; Lumaret, Jean-Pierre

    Between the years 1988 and 1995, five dung beetle communities were studied in combined conditions of habitat and trophic resources. Investigations were conducted on La Viale experimental farm, in the Causse Méjean, southern France. At each site, dung beetle traps of standard design were set up simultaneously. In most situations, the vegetation cover acted like a filter that allowed the penetration of several ubiquitous but fundamentally open-habitat dung beetle species into forest, at the same time drastically limiting their numbers. Open and close sites differed significantly, open and grazed sites showing the highest richness, abundance and biomass in beetles. Both in open and close sites, a significant increase in trophic resources led to an increase of the diversity and evenness. However in open-habitat, when resources were too abundant, few species were favoured and the diversity and evenness decreased. In forest-habitat, a continuous grazing during several years (increase in resources) modified the dung beetle community, with a high increase in the numbers and biomass of beetles but a smaller increase in richness. Numbers in forest habitat readjusted to the level observed in open habitat with equivalent trophic resources. Similarly to what was observed in open pastures, the forest communities were able to adjust their numbers to the level of available trophic resources. Resources were a more active variable than the structure of habitat on the dung beetle communities. Important resources go against the filter effect which allows the penetration under cover of open-habitat species. Changes were slow (several years), and forest communities remained weak. The poverty of forest habitats is discussed: This scarcity in species is probably due to long time human activities in Europe which drastically reduced forest habitats and developped grazing, favouring generalist and heliophilous open-habitat dung beetle species. Actual grassland communities in Europe are richer than their homologous communities in North America. Conversely, in North America where human activities are recent, the true forest dung beetle communities are still diverse and richer than grassland communities.

  9. Peer Interaction: A Social Perspective towards the Development of Foreign Language Learning (Interacción entre pares: una perspectiva social hacia el desarrollo del aprendizaje en una lengua extranjera)

    ERIC Educational Resources Information Center

    Gómez Lobatón, July Carolina

    2011-01-01

    This pedagogical innovation aims at discovering new ways of interaction that go beyond the unidirectional relationship that is presented in the classrooms most of the times. The innovation considers peers to be active agents in the construction of knowledge and proposes new ways to arrange groups in the classroom so that the arrangement can…

  10. Histoire d’un itinéraire épidémiologique entre le Burkina Faso et la Côte d’Ivoire : le cas des foyers de maladie du sommeil de Koudougou

    PubMed Central

    Kiendrébéogo, D.; Kambiré, R.; Jamonneau, V.; Lingué, K.; Solano, P.; Courtin, F.

    2012-01-01

    Dans la première moitié du XXème siècle, alors que la Haute-Volta (actuel Burkina Faso) subissait une terrible épidémie de maladie du sommeil, l’administration coloniale française a orchestré des déplacements massifs de populations de la Haute-Volta vers la Côte d’Ivoire, pour exploiter le territoire. Cela a conduit à la mise en place de villages de colonisation Mossi en zone forestière ivoirienne, comme ceux de Koudougou, issus de l’une des régions les plus peuplées de Haute-Volta, mais aussi l’une des plus touchées par la maladie du sommeil. Depuis 2000, au Burkina Faso, c’est dans le district sanitaire de Koudougou que sont dépistés passivement le plus grand nombre de trypanosomés en provenance de Côte d’Ivoire. Qui sont-ils ? Où habitent-ils au Burkina Faso ? D’où viennent-ils de Côte d’Ivoire ? Après avoir retracé l’histoire épidémiologique des villages de Koudougou au Burkina Faso et en Côte d’Ivoire, nous avons recherché les trypanosomés dépistés passivement depuis 2000 dans le district sanitaire de Koudougou au Burkina Faso. Au total, dix trypanosomés ont été enquêtés. Le processus de propagation de la maladie du sommeil dans l’espace ivoiro-burkinabé a été mis en évidence et des zones à risque de la maladie identifiées dans ce même espace. PMID:23193525

  11. O Imperio como Argumento: Um Contraponto entre Joaquim Nabuco e o Bispo D. Jose Mauricio da Rocha (The Empire as Argument: A Counterpoint between Joaquim Nabuco and the Bishop Dom Jose Mauricio da Rocha).

    ERIC Educational Resources Information Center

    Marson, Izabel Andrade

    1998-01-01

    Dialogs with the previous article establishing a comparative analysis between the political acceptance present in the reactionary speech of Dom Jose Mauricio da Rocha and in the monarchist words of Joaquim Nabuco. (PA)

  12. Contamination par le nickel et d'autres métaux lors de la manipulation des pièces de monnaie comparaison entre francs français et eurosContamination by nickel and other metals resulting from the manipulation of coins comparison between French francs and euros

    NASA Astrophysics Data System (ADS)

    Fournier, P.-G.; Govers, T. R.; Fournier, J.; Abani, M.

    The introduction of the euro has revived the interest for potential nickel allergies. We show that the handling of a single used nickel coin releases an average of 0.45 μg of nickel, 0.26 μg of copper and 0.08 μg of zinc, whereas a euro coin composed of nickel alloys releases 0.25 μg of nickel, 1.3 μg of copper and 0.17 μg of zinc. These levels of contamination, favored by friction during handling, differ from those obtained on the basis of the EN 1811 test applicable to solubilisation in artificial sweat. The evaluation of allergy risks following the introduction of the euro may require the consideration of potential synergies between the metals mentioned above. To cite this article: P.-G. Fournier et al., C. R. Physique 3 (2002) 749-758.

  13. Linking: Today's Libraries, Tomorrow's Technologies. Report of the Bibliographic and Communications Network Pilot Project. Canadian Network Papers Number 7 = Le Lien entre les Bibliotheques d'Aujourd'hui et les Technologies de Demain. Rapport du Projet Pilote du Reseau de Services Bibliographiques et de Communications. Documents sur les Reseaux Canadiens Numero 7.

    ERIC Educational Resources Information Center

    National Library of Canada, Ottawa (Ontario).

    A pilot project was conducted from May 1980 to November 1983 to test the application of iNet--a decentralized, packet-switched telecommunications network--to bibliographic data interchange in Canada. The principal components of the project were participation of the Bibliographic Common Interest Group (BCIP), a group of libraries with stand-alone,…

  14. Sur les inocérames de Tercis (Landes, France) : le meilleur outil corrélatif entre Europe et Amérique du Nord autour de la limite Campanien MaastrichtienInoceramids of the site of Tercis (Landes, France): the best correlative tool between Europe and North America across the Campanian Maastrichtian boundary

    NASA Astrophysics Data System (ADS)

    Odin, Gilles Serge; Walaszczyk, Ireneusz

    2003-01-01

    Four hundred inoceramids have been collected in the geological site at Tercis, where the Campanian-Maastrichtian boundary has been recently defined. At Tercis, a distinct drop of the adult size of inoceramids is observed between levels 111 and 117 and two turnovers of faunal composition were documented between levels 94 and 96 and between levels 111 and 117; the latter interval encompasses the stage boundary. The recognised inoceramid assemblages are very close to those known from North America, allowing better correlation than before between the two domains in the interval 77-70 Ma. The presence of these faunas perfectly located in the section leads to consider the Tercis section as the best known reference for this fossil group, the surprisingly good correlative potential of which has still to be considered in many areas.

  15. How To Talk to Your Doctor (and Get Your Doctor To Talk to You!). An Educational Workshop on Doctor Patient Communication = Como Hablarle a su Doctor (iY que su doctor le hable a usted!). Un seminario educativo sobre la comunicacion entre el doctor y el paciente.

    ERIC Educational Resources Information Center

    Baylor Coll. of Medicine, Houston, TX.

    This workshop, written in both English and Spanish, focuses on improving communication between physician and patient. In the workshop, the trainers will talk about "building bridges" between patient and doctor by understanding the doctor's role and his/her duty to the patient. According to the workshop, a person's doctor should communicate…

  16. La langue parlee le plus souvent entre les parents et les enfants: un facteur crucial dans l'acquisition linguistique de l'enfant dans un milieu bilingue (The Language Most Often Spoken between Parents and Children: A Crucial Factor in Child Language Acquisition in a Bilingual Environment). Working Papers on Bilingualism, No. 7.

    ERIC Educational Resources Information Center

    Hebrard, Pierre; Mougeon, Raymond

    The data for the study were gathered in the course of a larger sociolinguistic survey carried out among francophones from Welland and Sudbury, Ontario. Among other things, the acquisition of spoken English by bilingual francophone students from these cities was studied in depth, using error analysis. The present study attempts to show that in a…

  17. Efectos Especiales de Anclaje (Estudio sobre Regresiones de Juicios Condicionales). Parte 1: Distincion entre Efectos Aditivos y Efectos Multiplicativos en el Fenomeno de Anclaje (Special Effects of Anchoring (Study on Regression of Conditional Judgements) Part 1: Distinction Between Additive Effects and Multiplicative Effects in the Phenomenon of Anchoring). Publication No. 17.

    ERIC Educational Resources Information Center

    Lopez Alonso, A. O.

    A linear relationship was found between judgements given by 160 subjects to 7 objects presented as single stimuli (alpha judgements) and judgements given to the same objects presented with a condition (gamma judgements). This relationship holds for alpha judgements and the gamma judgements that belong to a family of constant stimulus and varying…

  18. Global Professional Identity in Deterretorialized Spaces: A Case Study of a Critical Dialogue between Expert and Novice Nonnative English Speaker Teachers (Identidad profesional global en espacios desterritorializados: un estudio de caso de los diálogos críticos entre profesores de inglés no nativos)

    ERIC Educational Resources Information Center

    Guerrero Nieto, Carmen Helena; Meadows, Bryan

    2015-01-01

    This study analyzes the online, peer-peer dialogue between two groups of nonnative English-speaking teachers who are attending graduate programs in Colombia and the United States. Framed by the theoretical concepts of critical pedagogy and global professional identity, a qualitative analysis of the data shows that their expert vs. novice roles…

  19. Construyendo un Puente entre la Educacion del Dotado y el Mejoramiento Escolar Integral. Resumen. La Serie de Decision Basada en la Investigacion (Building a Bridge between Gifted Education and Total School Improvement. Summary. Talent Development Research-Based Decision Making Series).

    ERIC Educational Resources Information Center

    Renzulli, Joseph S.

    This monograph addresses the role of gifted education in total school improvement by describing three service delivery components (the Total Talent Portfolio, Curriculum Modification Techniques, and Enrichment Learning and Teaching) and several organizational components of the Schoolwide Enrichment Model (SEM). The report describes how the SEM can…

  20. Tensions entre rationalité technique et intérêts politiques : l’exemple de la mise en œuvre de la Loi sur les agences de développement de réseaux locaux de services de santé et de services sociaux au Québec

    PubMed Central

    Contandriopoulos, D.; Hudon, Raymond; Martin, Elisabeth; Thompson, Daniel

    2013-01-01

    Sommaire L’objet de cet article est constitué par les processus décisionnels entourant la mise en œuvre de la Loi sur les agences de développement de réseaux locaux de services de santé et de services sociaux (Loi 25). Nous entendons mettre en lumière les stratégies des groupes ou institutions de diverses natures qui ont fait valoir leurs préférences et ont tenté, avec un succès inégal, d’influencer les décisions relatives à cette réforme majeure de la structure du système de santé québécois. Au plan théorique, nous nous appuyons principalement sur les modèles d’analyse du lobbying qui, depuis les travaux fondateurs de Milbrath (1960, 1963), présentent cette pratique comme un processus fondamental d’échange d’information. Selon les données colligées dans les retranscriptions d’entrevues, les stratégies observées correspondent effectivement aux caractéristiques constitutives du lobbying et, dans quelques situations, à celles du patronage. La combinaison de ces divers éléments révèle que la mise en œuvre de la Loi 25 s’avère être avant tout un processus proprement politique. Ainsi, furent relégués au second plan les arguments techniques qui composaient initialement les objectifs de la Loi. PMID:23509412

  1. El juego entre el nacimiento y los 7 anos: Un manual para ludotecarias. Investigacion-accion sobre la Familia y la Primera Infancia. UNESCO Sector de Educacion Monografia (Play between Birth and 7 Years: A Manual for Preschool Teachers. Action Research in Family and Early Childhood. UNESCO Education Sector Monograph).

    ERIC Educational Resources Information Center

    Grellet, Carolina

    The purpose of this Spanish-language manual is to help preschool teachers better understand theoretical concepts related to children's play. Following a preface that discusses UNESCO's activities related to early childhood education, the two main sections of the manual discuss children's play between 0-2 years and 2-7 years. Each section includes…

  2. Mitigation of Disagreement in Peer Review among L2 Learners and Native Speakers in a College Writing Class (Mitigación del Impacto de las Opiniones de Desacuerdo en el Proceso de Revisión por Pares entre Estudiantes de una Segunda Lengua y Hablantes Nativos en una Clase de Escritura a Nivel Universitario)

    ERIC Educational Resources Information Center

    Christoffersen, Katherine O'Donnell

    2015-01-01

    Peer review is now a commonplace practice in process-oriented writing instruction. A crucial aspect of peer review is assessing another classmate's work, which encompasses the act of disagreement. Given its prevalence in the classroom, it is necessary to analyze how L2 learners mitigate disagreement in the context of peer review with other L2…

  3. [The EMECAM protocol: an analysis of the short-term effect of air pollution on mortality. Estudio Multicéntrico Español sobre la Relación entre la Contaminación Atmosférica u la Mortalidad].

    PubMed

    Pérez-Hoyos, S; Sáez Zafra, M; Barceló, M A; Cambra, C; Figueiras Guzmán, A; Ordóñez, J M; Guillén Grima, F; Ocaña, R; Bellido, J; Cirera Suárez, L; López, A A; Rodríguez, V; Alcalá Nalvaiz, T; Ballester Díez, F

    1999-01-01

    The aim of this study is to Mortality show the protocol of analysis which was set out as part of the EMECAM Project, illustrating the application thereof to the effect of pollution has on the mortality in the city of Valencia. The response variables considered will be the daily deaths rate resulting from all causes, except external ones. The explicative variables are the daily series of different pollutants (black smoke, SO2, NO2, CO, O3). As possible confusion variables, weather factors, structural factors and weekly cases of flu are taken into account. A Poisson regression model is built up for each one of the four deaths series in two stages. In the first stage, a baseline model is fitted using the possible confusion variables. In the second stage, the pollution variables or the time legs thereof are included, controlling the residual autocorrelation by including mortality time lags. The process of fitting the baseline model is as follows: 1) Include the significant sinusoidal terms up to the sixth order. 2) Include the significant temperature or temperature squared terms with the time lags thereof up to the 7th order. 3) Repeat this process with the relative humidity. 4) Add in the significant terms of calendar years, daily tendency and tendency squared. 5) The days of the week as dummy variables are always included in the model. 6) Include the holidays and the significant time lags of up to two weeks of flu. Following the reassessment of the model, each one of the pollutants and the time lags thereof up to the fifth order are proven out. The impact is analyzed by six-month periods, including interaction terms. PMID:10410600

  4. En sus marcas--Listos--A leer! Para los cuidadores de ninos pequenos: Actividades de lenguaje para la primera infancia y ninez entre el nacimiento y los 5 anos. El reto: A leer, America! (Ready--Set--Read! For Caregivers: Early Childhood Language Activities for Children from Birth through Age Five. America Reads Challenge).

    ERIC Educational Resources Information Center

    Department of Education, Washington, DC.

    This Ready--Set--Read Kit includes an activity guide for caregivers, a 1997-98 early childhood activity calendar, and an early childhood growth chart. The activity guide presents activities and ideas that caregivers (family child care providers and the teachers, staff, and volunteers in child development programs) can use to help young children…

  5. En sus marcas--Listos--A leer! Para las familias: Actividades de lenguaje para la primera infancia y ninez entre el nacimiento y los 5 anos. El reto: A leer, America! (Ready--Set--Read! For Families: Early Childhood Language Activities for Children from Birth through Age Five. America Reads Challenge).

    ERIC Educational Resources Information Center

    Department of Education, Washington, DC.

    This Ready--Set--Read Kit includes an activity guide for families, a 1997-98 early childhood activity calendar, and an early childhood growth wallchart. The activity guide presents activities and ideas that families (adults who have nurturing relationships with a child--a mother, father, grandparent, other relative, or close friend) can use to…

  6. Human Relations Activities for the Single Parent To Develop More Effective Parent/Child Relations. Bilingual Guide = Actividades sobre relaciones humanas para ayudar al padre-soltero o madre-soltera a desarrollar una relacion efectiva entre padre e hijo Guia bilingue.

    ERIC Educational Resources Information Center

    Peterson, Susan

    Written in English and Spanish, this bilingual guide offers 10 activities which single parents can use to improve their relationships with their children. Objectives of activities include: (1) developing children's responsibility for work tasks in the home; (2) improving sibling relationships; (3) discussing emergencies with children; (4)…

  7. Les Differences dans l'emploi de la construction possessive "N1"+"DE"+"N2" entre le XIX et le XX s. dans la prose litteraire francaise (Differences in the Use of the Possessive Construction "N1"+"de"+"N2" between 19th and 20th Century French Literature).

    ERIC Educational Resources Information Center

    Roglic, Vera

    1991-01-01

    Study looks at frequency of noun1 + de + noun2 possessive in French prose. Researchers used chi-square and Pearson test to analyze results of syntagmatic possessive construction in works by Hugo, Stendahl, Balzac, Zola, Gide, Malraux, St. Exupery, and Sartre. Findings indicate that syntagmatic genitive possessive is more commonly found in…

  8. Le complexe annulaire d'âge Oligocène de l'Achkal (hoggar Central, Sud Algérie) : témoin de la transition au Cénozoïque entre les magmatismes tholéitique et alcalin. Évidences par les isotopes du Sr, Nd et Pb

    NASA Astrophysics Data System (ADS)

    Maza, Mustapha; Briqueu, Louis; Dautria, Jean-Marie; Bosch, Delphine

    1998-08-01

    The Achkal Oligocene ring complex cross-cuts the Upper Eocene tholeiitic traps located on the top of the Hoggar swell. The plutonic rocks range from tholeiitic gabbros to alkali essexites, monzonites and syenites, whereas the volcanites are restricted to late peralkaline rhyolites. The affinity change linked to the large isotopic heterogeneities (from EM1 to HIMU) suggests that the parental magmas are issued from two distinct mantle sources, first lithospheric then deeper. The Achkal has recorded the magmatic evolution of the Hoggar hot spot, between Eocene and Miocene.

  9. L'impact de l'enseignement de la biologie sur la construction de la distinction entre normal et pathologique chez les eleves du secondaire Marocain (The Impact of Teaching Biology on the Way Moroccan High School Students Construe the Difference between Normal and Pathological).

    ERIC Educational Resources Information Center

    Khzami, Salah-Eddine; Favre, Daniel

    2002-01-01

    Study of the distinction between the notions of the normal and the pathological among Moroccan high school students and their teachers of biology found that students confused the registers of the normal/abnormal with the healthy/pathological, a fact that is at odds with current teaching in biology. It also found a possible link to the values held…

  10. Apports des phyllosilicates dans la différenciation entre altération hypogène et altération supergène dans le basalte triasique du Moyen Atlas (Maroc)Contribution of phyllosilicates to distinguish between hypogene alteration and weathering in Triassic basalt from Middle Atlas (Morocco)

    NASA Astrophysics Data System (ADS)

    Dekayir, Abdelilah; Danot, Michel; Allali, Nabil

    2002-09-01

    Triassic basalt of the Middle Atlas has been subject to metamorphic transformation then weathering. Occurrence in both metabasalt and saprolite of ubiquitous clay minerals, such as smectite and mixed layers chlorite-smectite, makes it difficult to distinguish between the two alteration facies and explains the interest of complementary sources of information. In the Bhallil weathering profile, petrographical and mineralogical analyses of primary igneous minerals and their alteration products coupled with Fe oxidation state determination in clay fractions allow to identify three alteration facies: ( i) metamorphic basalt, where iron occurs mainly as the ferrous form; ( ii) the lower part of saprolite, where iron is partially oxidized to its ferric form; ( iii) the upper part of saprolite, where iron is completely oxidized. To cite this article: A. Dekayir et al., C. R. Geoscience 334 (2002) 877-884.

  11. Synergie entre la télédétection multispectrale et les données de terrain pour la conception d'un nouveau modèle géodynamique d'ouverture du bassin paléozoîque des Jebilet centrales (Maroc)

    NASA Astrophysics Data System (ADS)

    El Harti, Abderrazak; Bannari, Abderrazak; Bachaoui, El Mostafa; Aarab, El Mostafa; Girouard, Guillaume; El Ghmari, Abderrahmen

    2004-11-01

    The geodynamic model of the Palaeozoic basin opening of central Jebilet has been unknown before this study in spite of the abundance in the geological studies carried out in the studied sector using conventional methods. This is due to the scarcity of the key beds and synsedimentary structures. Using the synergy between the image data of the Landsat satellite TM sensor and the ground data, we have highlighted, herein, new structural data allowing the design of a new model of the Palaeozoic basin opening of central Jebilet. This opening could have been made according to dextral submeridian transverse faults with the individualization of subequatorial normal faults. To cite this article: A. El Harti et al., C. R. Geoscience 336 (2004).

  12. Restriction des communications entre l'Atlantique et la Méditerranée au Messinien : apport de la téphrochronologie dans la plate-forme carbonatée et le bassin de Melilla Nador (Rif nord-oriental, Maroc)Restriction of the seawater exchanges between the Atlantic and the Mediterranean during the Messinian: contribution of the tephrochronology of the Melilla Nador area (north-eastern Rif, Morocco)

    NASA Astrophysics Data System (ADS)

    Münch, Philippe; Roger, Stephan; Cornée, Jean-Jacques; Saint Martin, Jean-Paul; Féraud, Gilbert; Moussa, Abdelkhalak Ben

    2001-05-01

    Thirty-eight volcanic layers have been found, from the littoral carbonate platform to the basin, interbedded within the Neogene deposits of the Melilla-Nador area. Ten of them, whose stratigraphic location and geographic extension have been established, were petrographically and mineralogically studied. They have been used as markers to establish an overall platform/basin correlation sketch. Together with these correlations and a synthesis of available ages, we show that the sedimentation areas, and thus the oceanic circulations, progressively restricted in this region between 6.5 and 5.77 Ma as a consequence of tectono-magmatic activity of the Gourougou magmatic field.

  13. Reductions in entree energy density increase children's vegetable intake and reduce energy intake

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The energy density (ED; kcal/g) of an entrée influences children's energy intake (EI), but the effect of simultaneously changing both ED and portion size of an entrée on preschool children's EI is unknown. In this within-subject crossover study, 3- to 5-year-old children (30 boys, 31 girls) in a day...

  14. Vegetable Purée: A Pilot Study to Increase Vegetable Consumption among School Lunch Participants in US Elementary Schools

    ERIC Educational Resources Information Center

    Vale, Angela; Schumacher, Julie Raeder; Cullen, Robert W.; Gam, Hae Jin

    2014-01-01

    Purpose/Objectives: Recent US Department of Agriculture regulations increased the amount and variety of vegetables required for school lunches. Vegetables are the most wasted components of lunch while entrées are selected and consumed by the majority of children. This study examined how adding vegetable purée to an elementary school lunch entrée…

  15. Informe Anual a la Nación sobre el Cáncer de 1975 a 2008: preguntas y respuestas

    Cancer.gov

    Los índices generales de mortalidad por cáncer han seguido disminuyendo desde principios de los noventa entre hombres, mujeres y niños. Los índices de mortalidad disminuyeron en promedio 1,6% por año entre 2004 y 2008.

  16. [In Process Citation].

    PubMed

    Rodríguez-Valle, Ana; Navarro-Ferrando, María Ángeles; Boj-Carceller, Diana; Escanero-Marcén, Jesús Fernando; Sanz-Paris, Alejandro

    2016-01-01

    Objetivo: poco se conoce sobre el impacto de orlistat en el sistema leptina. Estudiamos la respuesta de la leptina plasmática y la sensación de saciedad tras dos días de tratamiento con orlistat sin dieta hipocalórica ni pérdida de peso. Material y métodos: reclutamos veinte mujeres obesas en nuestras consultas externas de medicina. Habían recibido restricción dietética y modificación del estilo de vida, pero se habían mantenido obesas con peso corporal estable durante seis meses antes de su inclusión en el estudio. Resultados: las pacientes tomaron 120 mg de orlistat 3 veces al día y mantuvieron su dieta habitual. Al inicio y dos días después del tratamiento con orlistat se repitieron el examen físico, la sensación de hambre y la analítica. No hubo diferencias significativas en el consumo de energía de la dieta, el peso corporal y la relación cintura-cadera, así como en glucosa sérica, insulina y péptido C. Solamente las concentraciones de leptina y triglicéridos en suero disminuyeron (p: 0,0001 y 0,01, respectivamente). La disminución de la concentración de leptina en suero se correlacionó positivamente con cambios en la concentración de triglicéridos (p: 0.01, r2: 0,45). La sensación de hambre aumento antes de la cena y se correlacionó negativamente con la disminución de la leptina (p: 0,0001, r2: 0,74) y triglicéridos (p: 0,02, r2: 0.59). Conclusión: estos datos sugieren que la malabsorción parcial de grasas por el tratamiento con orlistat disminuye rápidamente los niveles plasmáticos de triglicéridos y leptina. Este descenso se asoció con aumento del apetito antes de la ingesta que sigue a la comida principal del día. PMID:27238788

  17. Use of black vulture (Coragyps atratus) in complementary and alternative therapies for cancer in Colombia: A qualitative study

    PubMed Central

    2012-01-01

    Background Although Coragyps atratus has been used as a traditional therapy for patients with cancer, the scientific literature does not contain enough information on how this therapy is used or the mechanisms that explain this therapeutic practice. Objectives To understand the methods of use and the reasons given by patients and caregivers for the use of Coragyps atratus in cancer treatment. Methods This study used a qualitative design based on twenty in-depth interviews of patients with cancer or caregivers of patients with the disease. The analysis of the text was based on an inductive thematic approach. Results Resistance to disease and immune enhancement are properties attributed to Coragyps atratus when used for cancer treatment. The most recommended method of use is fresh blood ingestion, and the associated mechanism of action is transfer of immune factors to the individual who consumes it. Conclusions Use of Coragyps atratus as a treatment for cancer is a popular alternative therapy in Colombia. More studies are needed to understand the clinical effects of this intervention in cancer patients. Spanish abstract Introducción Aunque Coragyps atratus se usa tradicionalmente como terapia para pacientes con cáncer, no existe suficiente información en la literatura científica sobre su forma de utilización ni sobre los mecanismos explicativos que subyacen a esta práctica terapéutica. Objetivos Conocer métodos de utilización y mecanismos explicativos dados por los pacientes y cuidadores de pacientes sobre el uso de Coragyps atratus en el tratamiento del cáncer. Materiales y métodos Diseño cualitativo basado en veinte entrevistas en profundidad de pacientes con cáncer o cuidadores de pacientes con esta enfermedad. Análisis de texto basado en enfoque temático inductivo. Resultados Al Coragyps atratus se le atribuyen propiedades de resistencia y fortalecimiento del sistema inmune de personas enfermas de cáncer. La forma de utilización mas común es la

  18. DEVELOPMENT OF SUPERIOR ENTRAINMENT SEPARATORS

    EPA Science Inventory

    An experimental and theoretical program was carried out to develop an improved design for entrainment separators for scrubbers. The problems of separation efficiency, suspended solids deposition and plugging of the entrainment separator were of primary concern. A pilot scale entr...

  19. Extrapolate the Past... or Invent the Future

    ScienceCinema

    Vinod Khosla

    2010-01-08

    Berkeley Lab's Environmental Energy Technologies Division launches its Distinguished Lecturer series with a talk by Vinod Khosla, founder of Khosla Ventures, whose mission is to "assist great entre...  

  20. Giant Enhancement of Diffusion in a Tilted Egg-Carton Potential

    NASA Astrophysics Data System (ADS)

    Yang, Song; Jing-Dong, Bao

    2016-02-01

    Not Available Supported by the National Natural Science Foundation of China under Grant Nos 11575024 and 11175021, and the Plan of Beijing College Students' Scientific Research and EntrePrenurial Action under Grant No 105820.

  1. Extrapolate the Past... or Invent the Future

    SciTech Connect

    Vinod Khosla

    2008-10-14

    Berkeley Lab's Environmental Energy Technologies Division launches its Distinguished Lecturer series with a talk by Vinod Khosla, founder of Khosla Ventures, whose mission is to "assist great entre...  

  2. Evaluation of a Voluntary Menu-Labeling Program in Full-Service Restaurants

    PubMed Central

    Leng, Kirsten

    2010-01-01

    Objectives. We assessed whether labeling restaurant menus with information on the nutrient content of menu items would cause customers to alter their ordering patterns. Methods. Six full-service restaurants in Pierce County, Washington, added nutrition information to their menus, and they provided data on entrée sales for 30 days before and 30 days after the information was added. We assessed the prelabeling versus postlabeling difference in nutrient content of entrées sold, and we surveyed restaurant patrons about whether they noticed the nutrition information and used it in their ordering. Results. The average postlabeling entrée sold contained about 15 fewer calories, 1.5 fewer grams of fat, and 45 fewer milligrams of sodium than did the average entrée sold before labeling. Seventy-one percent of patrons reported noticing the nutrition information; 20.4% reported ordering an entrée lower in calories as a result, and 16.5% reported ordering an entrée lower in fat as a result. Conclusions. The concentration of calorie reduction among 20.4% of patrons means that each calorie-reducing patron ordered about 75 fewer calories than they did before labeling. Thus, providing nutrition information on restaurant menus may encourage a subset of restaurant patrons to significantly alter their food choices. PMID:20395577

  3. Fruit and vegetable exposure in children is linked to the selection of a wider variety of healthy foods at school.

    PubMed

    Korinek, Elizabeth V; Bartholomew, John B; Jowers, Esbelle M; Latimer, Lara A

    2015-10-01

    Schools often offer healthy fruits and vegetables (FV) and healthy entrées. However, children may resist these efforts due to a lack of familiarity with the offerings. While numerous exposures with a food increase its liking, it may be that an exposure to a variety of FV at home leads to greater willingness to select other foods - even those that are unrelated to those eaten at home. As an initial test of this possibility, this study was designed to examine how self-reports of exposure and consumption of various FV were associated with the selection of FV and lunch entrées at school. Participants (n = 59) were a convenience sample of elementary children. A median split was used to place students into high- and low-exposure groups for self-reports of both exposure and consumption at home. The primary dependent variables were self-reports of selecting FV at school; the children's absolute and relative ratings of eight 'healthier' lunch entrées; and self-reports of selecting these entrées. These entrées were recently added to the school menu and, therefore, tended to be less familiar to children. Food ratings were collected through taste exposures conducted at school. Results indicate that children who reported more frequent exposure to FV at home consumed a wider variety of FV at school and were more likely to report selecting 'healthier' entrées at school lunch. These data suggest that exposure to, and the consumption of, a variety of FV may make children more willing to select a wider range of FV and other healthy entrées. PMID:23557428

  4. El rol de Ia colaboracion y el Modelo de Aprendizaje Basado en Proyectos (ABPr) mediante el lente de la Teoria de Actividad (CHAT): un estudio de caso con estudiantes de 9no grado

    NASA Astrophysics Data System (ADS)

    Delgado, Isabel C.

    Los modelos de eensenanza y aprendizaje constructivistas conceptualizan el aprendizaje como un proceso activo. El modelo de Aprendizaje Basado en Proyectos (ABPr) se distingue por una serie de componentes, entre los cuales se destaca el aspecto colaborativo y cooperativo como un reto al momento de su implantacion. Son pocas las investigaciones que se concentran en este aspecto del modelo. En este estudio, se analizaron las diversas interacciones que surgen durante la implantacion de una unidad curricular sobre el tema de Geologia de Puerto Rico, la cual se diseno con el modelo ABPr cuyo enfoque es orientacion a proyectos. Particularmente, se examinaron las interacciones sociales que surgen entre los pares y entre pares y docente durante el proceso de planificacion y desarrollo de los productos finales, al igual que las interacciones entre los estudiantes y el material didactico en estas etapas del modelo. La investigacion es de tipo cualitativo e incorpora como diseno el estudio de caso. Las diversas interacciones constituyen la unidad de analisis. En el estudio participaron 19 estudiantes de 9no grado, a quienes se organizaron en 5 grupos colaborativos por temas de interes (Pangea, Placas tectonicas, Volcanes, Tsunamis y Terremotos). Las tecnicas que se utilizaron para recopilar los datos fueron: observaciones participativas, grupos focales y analisis de documentos (cuadernos reflexivos y respuestas de los estudiantes a la pregunta central del proyecto). Para el analisis de los datos se aplico la teoria de actividad (CHAT) que concentra la unidad de analisis en la actividad humana en un contexto particular. Los resultados del estudio senalan que las interacciones entre pares, entre pares y docente, asi como entre estudiantes y material didactico son fundamentales en el proceso de aprendizaje. Una mayor interaccion entre pares durante las etapas de planificar y desarrollar los productos finales de la unidad, promueve una mejor comprension de los conceptos de la

  5. Violencia de Pareja en Mujeres Hispanas: Implicaciones para la Investigación y la Práctica

    PubMed Central

    Gonzalez-Guarda, Rosa Maria; Becerra, Maria Mercedes

    2012-01-01

    Las investigaciones sobre la violencia entre parejas sugieren que las mujeres hispanas están siendo afectadas desproporcionadamente por la ocurrencia y consecuencias de este problema de salud pública. El objetivo del presente artículo es dar a conocer el estado del arte en relación a la epidemiologia, consecuencias y factores de riesgo para VP entre mujeres Hispanas, discutiendo las implicaciones para la investigación y la práctica. Investigaciones han demostrado una fuerte asociación del status socioeconómico, abuso de droga y el alcohol, la salud mental, aculturación, inmigración, comportamientos sexuales riesgosos e historia de abuso con la violencia entre parejas. Sin embargo, más estudios se deben llevar a cabo para identificar otros factores de riesgos y de protección a poblaciones hispanas no clínicas. Mientras que el conocimiento sobre la etiología de la VP entre mujeres Hispanas se expanda, enfermeras y otros profesionales de la salud deben desarrollar, implementar y evaluar estrategias culturalmente adecuadas para la prevención primaria y secundaria de la violencia entre pareja. PMID:26166938

  6. Las ideologias, las ciencias naturales y sus implicaciones en la educacion cientifica

    NASA Astrophysics Data System (ADS)

    Lozada Roldan, Sandra

    Este estudio ausculto las concepciones epistemologicas de los docentes de ciencia del nivel secundario con relacion a las ideologias y las ciencias naturales. Tambien examino las posiciones de los docentes ante asuntos publicos relacionados a la ciencia. Para propositos de este estudio se diseno y se valido el cuestionario con el cual se obtuvieron los resultados. La investigacion es de tipo cuantitativa y se utilizo como diseno la encuesta. El cuestionario se administro en varias actividades de desarrollo profesional para maestros de ciencia. Un total de 78 maestros del nivel secundario respondieron el cuestionario. Para analizar los datos obtenidos se utilizaron estadisticas descriptivas como la distribucion de frecuencia y el porciento. Ademas se establecieron codigos y categorias para describir las posiciones de los maestros ante asuntos publicos relacionados a la ciencia. Los analisis demostraron que entre los docentes participantes de este estudio prevalecen ciertas concepciones epistemologicas adecuadas acerca de las ciencias naturales, a la luz de la literatura consultada. Entre estas concepciones se destacan las siguientes: a) la filosofia materialista de las ciencias naturales, b) la naturaleza tentativa y constructivista del conocimiento cientifico, c) el uso de una metodologia que garantiza cierto grado de objetividad y con el que se justifican y validan los enunciados cientificos y d) la funcion instrumental del conocimiento cientifico. Sin embargo, entre los docentes participantes de este estudio prevalecen ciertas concepciones epistemologicas erroneas acerca de las ciencias naturales, a la luz de la literatura consultada. Entre estas concepciones se destacan las siguientes: a) tendencia inductivista en el que las teorias cientificas comienzan con observaciones que establecen generalizaciones, b) secuencia jerarquica de la metodologia cientifica. Ademas, entre los docentes participantes de este estudio prevalecen concepciones epistemologicas adecuadas

  7. L'astronomie dans le monde

    NASA Astrophysics Data System (ADS)

    Manfroid, J.

    2004-03-01

    Rosetta du mythe à la réalité; Saturne par Cassini; Rencontre à haut risque entre une étoile et un trou noir géant; SN 1987A; Europe stérile?; Galaxie lointaine; Télescopes liégeois; HD 209458

  8. La parole, vue et prise par les etudiants (Speech as Seen and Understood by Student).

    ERIC Educational Resources Information Center

    Gajo, Laurent, Ed.; Jeanneret, Fabrice, Ed.

    1998-01-01

    Articles on speech and second language learning include: "Les sequences de correction en classe de langue seconde: evitement du 'non' explicite" ("Error Correction Sequences in Second Language Class: Avoidance of the Explicit 'No'") (Anne-Lise de Bosset); "Analyse hierarchique et fonctionnelle du discours: conversations entre basketteurs a plus de…

  9. Estudio del NCI revela que la obesidad extrema puede acortar la esperanza de vida hasta en 14 años

    Cancer.gov

    Los adultos con obesidad extrema tienen mayor riesgo de morir a edad más joven por cáncer y muchas otras causas entre ellas, enfermedades cardíacas, accidentes cerebrovasculares, diabetes y enfermedades del hígado y los riñones, según estudio del NCI.

  10. Meeting DG's

    ScienceCinema

    None

    2011-04-25

    Le DG J.Adams commente les 3 thèmes de la réunion: 1.) le prochain DG du Cern (qui sera H.Schopper) 2.) le LEP 3.) les conclusions du comité des finances concernant salaires, allocations etc. Discussion entre le DG J.Adams, Mons.Ullmann, chef du personel et l'auditoire

  11. Effects of portion size and energy density on young children's intake at a meal

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Large portions of energy-dense foods are one feature of obesity-promoting dietary environments. Entrée portion size has been shown to influence energy intake at meals by young children. The role of energy density (ED) in children’s response to portion size, however, is unknown. We aimed to test th...

  12. Desigualdades por cáncer

    Cancer.gov

    Información básica de las desigualdades en salud por cáncer en EE. UU., factores que contribuyen a la carga desproporcionada del cáncer en algunos grupos y ejemplos de desigualdades en incidencia y mortalidad entre ciertos grupos de la población.

  13. Middle School Cafeteria Food Choice and Waste Prior to Implementation of Healthy, Hunger-Free Kids Act Changes in the National School Lunch Program

    ERIC Educational Resources Information Center

    Connors, Priscilla; Bednar, Carolyn

    2015-01-01

    Purpose/Objectives: The study objective was to document choices of entrées, vegetables, fruits, grains/breads, and beverages on lunch trays and to determine the amount of each that was discarded after mealtime. Methods: A convenience sample of two urban middle school cafeterias in Texas participated in the study which took place in the 2010-2011…

  14. Se lanza Lung-MAP, el primer estudio de medicina de precisión de Red Nacional de Estudios Clínicos

    Cancer.gov

    Hoy se anunció el inicio de un estudio clínico denominado Protocolo Modelo para el Cáncer de Pulmón (Lung-MAP) en lo que constituye un esfuerzo de colaboración excepcional entre organizaciones públicas y privadas.

  15. Síntesis: Resultados iniciales del Estudio Nacional de Ex

    Cancer.gov

    El 4 de noviembre de 2010, el Estudio Nacional de Exámenes de Pulmóndio a conocer resultados iniciales que indican que hubo 20% menos muertes por cáncer de pulmón entre los participantes del estudio evaluados con tomografía computarizada espiral de baja d

  16. Early Error Detection: An Action-Research Experience Teaching Vector Calculus

    ERIC Educational Resources Information Center

    Añino, María Magdalena; Merino, Gabriela; Miyara, Alberto; Perassi, Marisol; Ravera, Emiliano; Pita, Gustavo; Waigandt, Diana

    2014-01-01

    This paper describes an action-research experience carried out with second year students at the School of Engineering of the National University of Entre Ríos, Argentina. Vector calculus students played an active role in their own learning process. They were required to present weekly reports, in both oral and written forms, on the topics studied,…

  17. The new role of scientists

    ScienceCinema

    None

    2011-04-25

    Le D.G. Jentschke fait l'introduction et présente le Prof.Kowarsky, spécialiste en microbiologie, physique nucléaire et une des fondateurs du Cern. Il parle entre autre de l'énergie nucléaire (pacifique)et de remise en questions des valeurs scientifiques et techniques

  18. Examining the Preliminary Efficacy of a Dating Violence Prevention Program for Hispanic Adolescents

    ERIC Educational Resources Information Center

    Gonzalez-Guarda, Rosa Maria; Guerra, Jessica E.; Cummings, Amanda A.; Pino, Karen; Becerra, Maria M.

    2015-01-01

    The purpose of this study is to evaluate the preliminary efficacy of a dating violence (DV) prevention program for Cuban American adolescents ("JOVEN"/YOUTH: "Juntos Opuestos a la Violence Entre Novios"/Together Against Dating Violence). A randomized-controlled experimental design with a delayed condition was used to evaluate…

  19. Pruebas de BRCA en pacientes jóvenes con cáncer

    Cancer.gov

    Pruebas de mutaciones genéticas fuertemente asociadas con un mayor riesgo de cáncer de seno han aumentado dramáticamente entre mujeres menores de 40 años diagnosticadas con la enfermedad, según un nuevo estudio.

  20. Memory, Trauma, and Phantasmagoria in Claudia Llosa's "La Teta Asustada"

    ERIC Educational Resources Information Center

    Rueda, Carolina

    2015-01-01

    The film "La teta asustada" (Claudia Llosa, 2009) was inspired by the text titled "Entre prójimos: El conflicto armado interno y la política de la reconciliación en el Perú" by the medical anthropologist Kimberly Theidon. In this study, Theidon compiles the testimonies of a group of indigenous women who were sexually assaulted…

  1. Asociación de XMRV con enfermedades humanas se debe a contaminación

    Cancer.gov

    Nuevas investigaciones muestran que una asociación, mencionada en numerosos estudios, entre el retrovirus conocido como XMRV y el cáncer de próstata así como el síndrome de fatiga crónica, se debe a contaminación de laboratorio con un virus que se originó en ratones.

  2. 7 CFR 210.11 - Competitive food service and standards.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... entrée item offered as part of the lunch program or the breakfast program under 7 CFR Part 220 is exempt... than 35 percent of total calories from fat per item as packaged or served, except as specified in... than 10 percent of total calories per item as packaged or served, except as specified in paragraph...

  3. Informe a la nación indica que los índices de muertes por cáncer siguen bajando

    Cancer.gov

    Los índices de mortalidad por todos los cánceres combinados para hombres, mujeres y niños siguieron bajando en Estados Unidos entre 2004 y 2008, según el Informe Anual a la Nación sobre el Estado del Cáncer de 1975 a 2008. El índice general de diagnóstico

  4. Informe a la Nación de mortalidad por cáncer sigue bajando

    Cancer.gov

    El Informe Anual a la Nación sobre el Estado del Cáncer, de 1975 a 2009, indica que los índices generales de mortalidad por cáncer siguen bajando en los Estados Unidos en hombres y mujeres, entre todos los grupos raciales y étnicos principales y para todo

  5. Hoja informativa del alcohol y el riesgo de cáncer

    Cancer.gov

    Hoja informativa que resume la comprobación de la relación entre el consumo de alcohol y el riesgo de varios cánceres. Incluye información de los factores que afectan el riesgo de cánceres asociados con el alcohol, como son los genes y el uso de tabaco.

  6. El pronóstico del cáncer

    Cancer.gov

    Tres pacientes con cáncer y su médico, el doctor Anthony L. Back, un oncólogo quien también es experto a nivel nacional en la comunicación entre médicos y pacientes, comparten sus puntos de vista sobre sus pronósticos de cáncer.

  7. Selection of the Argentine indicator region

    NASA Technical Reports Server (NTRS)

    Ramirez, C. J.; Reed, C. R. (Principal Investigator)

    1982-01-01

    Determined from available Argentine crop statistics, selection of the Indicator Region was based on the highest wheat, corn, and soybean producing provinces, which were: Buenos Aires, Cordoba, Entre Rios, and Santa Fe. Each province in Argentina was examined for the availability of LANDSAT data; area, yield and production statistics; crop calendars; and other ancillary data. The Argentine Indicator Region is described.

  8. Écologie des soins de santé au Canada

    PubMed Central

    Stewart, Moira; Ryan, Bridget

    2015-01-01

    Résumé Objectif Présenter un profil populationnel pancanadien des besoins en soins de santé et de leur utilisation, facile d’accès et permettant des comparaisons entre les provinces et avec d’autres instances internationales. Conception Une comparaison des taux d’utilisation des soins de santé entre les provinces en utilisant des données d’enquêtes et des renseignements administratifs sur la santé. Contexte Les provinces du Canada. Principaux paramètres à l’étude Les taux canadiens et provinciaux de personnes en mauvaise santé (présence de problèmes chroniques) et d’utilisation des soins de santé (contacts avec des médecins de famille, avec d’autres médecins spécialistes, avec des infirmières et hospitalisations) sous forme de proportions mensuelles par 1000 habitants normalisées en fonction de l’âge et du genre. Résultats La proportion mensuelle par 1000 habitants de personnes souffrant d’au moins 1 problème chronique variait de 524 au Québec à 638 en Nouvelle-Écosse; les contacts avec un médecin de famille se situaient entre 158 au Québec et 295 en Colombie-Britannique; les contacts avec d’autres médecins spécialistes variaient entre 53 en Saskatchewan et 79 en Ontario; et le nombre de contacts avec des infirmières se situait entre 23 en Colombie-Britannique et 41 au Québec. Le nombre de séjours à l’hôpital variait entre 8 et 11 par 1000 habitants et les proportions étaient semblables d’une province à l’autre. Conclusion Il est essentiel de reconnaître les distinctions entre les provinces pour éclairer les politiques sur la santé dans l’ensemble du pays. Les différences persistaient lorsque les taux étaient normalisés en fonction de la composition démographique variable selon l’âge et le genre dans les provinces. Cet article présente une méthodologie simple à l’aide de données publiquement accessibles qui peut servir dans chaque province à examiner, à l’avenir, l

  9. Eventos de Desconexao na Cauda de Plasma do Cometa P/Halley

    NASA Astrophysics Data System (ADS)

    Voelzke, M. R.; Fahr, H. J.

    2001-08-01

    Observacoes cometárias e de vento solar sao comparadas com o propósito de determinar-se as condicoes do vento solar associadas aos eventos de desconexao (DEs) observados em caudas de plasma cometárias. Os dados cometários sao provenientes do The International Halley Watch Atlas of Large-Scale Phenomena. A análise visual sistemática das imagens do atlas revelou, entre outras estruturas morfológicas, 47 DEs ao longo da cauda de plasma do P/Halley. Estes 47 DEs registrados em 47 imagens distintas permitiram a descoberta de 19 origens de DEs, ou seja, o tempo em que as desconexoes iniciaram foi calculado. Os dados do vento solar sao provenientes de medidas feitas in situ pela sonda espacial IMP-8, as quais foram usadas para elaborar a variacao da velocidade do vento solar, densidade e pressao dinâmica durante o intervalo analisado. O presente trabalho compara as atuais teorias conflitantes, baseadas nos mecanismos de formacao, com o intuito de explicar o fenômeno cíclico dos DEs, ou seja, os efeitos de producao iônica, os efeitos de pressao e os efeitos de reconexao magnética sao analisados. Para cada uma das 19 origens de DEs comparou-se a densidade com a respectiva velocidade do vento solar com o intuito de determinar-se uma possível correlacao entre estas origens e os efeitos de pressao dinâmica. Quando da ocorrência de 6 origens de DEs o IMP-8 nao realizou medidas, nos outros 13 casos 10 origens (77%) mostraram uma anticorrelacao entre velocidade e densidade e apenas 3 (23%) revelaram uma tendência similar entre velocidade e densidade. Portanto, a análise inicial demonstra uma fraca correlacao entre as origens dos DEs e os efeitos de pressao.

  10. [Not Available].

    PubMed

    Flores Navarro-Pérez, Carmen; González-Jiménez, Emilio; Schmidt-RioVilla, Jacqueline; Meneses-Echávez, José Francisco; Correa-Bautista, Jorge Enrique; Correa-Rodríguez, María; Ramírez-Vélez, Robinson

    2016-01-01

    Objetivos: los objetivos de este estudio fueron analizar el nivel nutricional en una población de niños y adolescentes colombianos y determinar la posible relación entre el nivel nutricional y el estado nutricional según el índice de masa corporal (IMC) y la circunferencia de cintura (CC).Material y métodos: estudio transversal en 6.383 niños y adolescentes de entre 9 y 17,9 años de edad, de Bogotá, Colombia. Se aplicó de manera autodiligenciada el cuestionario Krece Plus validado en el estudio enKid como indicador del nivel nutricional con las categorías alto (test ≥ 9), medio (test 6-8) y bajo (test ≤ 5). Se tomaron medidas de peso, talla, CC, y se calculó el IMC como marcadores del estado nutricional.Resultados: de la población general, el 57,9% eran chicas (promedio de edad 12,7 ± 2,3 años). En todas las categorías del IMC, más del 50% de chicos y chicas siguen una dieta de muy baja calidad, que empeora progresivamente con el avance en edad. En ambos sexos, se observaron tendencias entre un nivel nutricional muy bajo con el desarrollo de sobrepeso. Asimismo, la obesidad abdominal por CC se relacionó con una puntuación baja en el Krece Plus en ambos sexos.Conclusiones: en escolares de Bogotá, una dieta de muy baja calidad se relacionó con alteraciones del estado nutricional (IMC y CC), especialmente entre chicas y adolescentes. Estos resultados deben alentar el desarrollo de intervenciones orientadas a mejorar los hábitos nutricionales entre los escolares colombianos. PMID:27571667

  11. Explicación de las disparidades raciales en la salud neonatal en Brasil*

    PubMed Central

    Nyarko, Kwame A.; López-Camelo, Jorge; Castilla, Eduardo E.; Wehby, George L.

    2015-01-01

    Objetivos. Buscamos cuantificar la manera en que los efectos socioeconómicos, demográficos, geográficos y de atención de salud explican las disparidades raciales en las tasas de bajo peso al nacer y prematuridad en Brasil. Métodos. Utilizamos una muestra de 8 949 niños nacidos entre 1995 y el 2009 en 15 ciudades y 7 provincias de Brasil. Nos centramos en las disparidades en la prevalencia de bajo peso al nacer (< 2 500 g) y prematuridad (< 37 semanas de gestación) en recién nacidos de ascendencia solo africana o mezclada con otras ascendencias y de ascendencia solo europea. Usamos un modelo de descomposición para cuantificar la contribución de los factores conceptualmente pertinentes a esas disparidades. Resultados. El modelo permitió explicar entre 45% y 94% de las disparidades en cuanto al bajo peso al nacer y entre 64% y 94% de las disparidades en cuanto a la prematuridad entre los grupos de ascendencia africana y de ascendencia europea. Las diferencias en el uso de atención prenatal y en la ubicación geográfica fueron los factores más importantes, seguidos por las diferencias socioeconómicas. El modelo permitió explicar la mayoría de las disparidades en los recién nacidos de ascendencia africana mezclada y parte de las disparidades en los de ascendencia solo africana. Conclusiones. En las políticas públicas para mejorar la salud infantil se deben abordar las diferencias en cuanto a la atención prenatal y la ubicación geográfica a fin de reducir las disparidades en materia de salud entre los recién nacidos de ascendencia africana y los de ascendencia europea en Brasil.

  12. Are Japanese groups more competitive than Japanese individuals? A cross-cultural validation of the interindividual-intergroup discontinuity effect.

    PubMed

    Takemura, Kosuke; Yuki, Masaki

    2007-02-01

    Study of Cultural and Ecological Foundations of the Mind, a 21(st) Century Center of Excellence Program at Hokkaido University. The authors would like to thank Dr. Laura Hernández-Guzmán, three anonymous reviewers, and Robin Cooper, Mark H. B. Radford, and Paul A. Wehr for their helpful comments on earlier versions of this article. They would also like to thank Dr. Chester A. Insko for his kind and valuable advice during the planning of this experiment as well as the interpretation of its results, Kaori Akaishi for her help with data collection, and, finally, colleagues at Hokkaido University who helped to recruit potential participants from their classes. L'effet de discontinuité entre les individus et entre les groupes est la tendance des relations entre les groupes à être plus compétitives que les relations entre les individus. Cet effet fut fermement démontré dans des études menées aux États-Unis, une société caractérisée d' «individualiste». Dans la présente étude, nous avons exploré dans quelle mesure l'effet était applicable à une société «collectiviste» comme le Japon. À partir du point de vue traditionnel de la psychologie interculturelle, laquelle met l'emphase sur la nature collectiviste des peuples de l'Asie de l'Est, il était attendu que l'effet de discontinuité allait être plus grand au Japon qu'aux États-Unis. D'un autre côté, se basant sur les données empiriques récentes qui suggèrent que les Nord-américains ne sont pas moins orientés vers le groupe que les Asiatiques de l'Est, il était attendu que l'effet de discontinuité ne serait pas plus important au Japon qu'aux États-Unis. Cent soixante étudiants universitaires japonais ont pris part à un jeu de dilemme de prisonnier de 10 essais répétés: 26 sessions entre individus et 18 sessions entre groupes. Suivant exactement la procédure des expériences menées précédemment aux États-Unis, les individus et les groupes avaient la permission de communiquer face

  13. Manipulation coherente de qubits de spin dans une boite quantique triple

    NASA Astrophysics Data System (ADS)

    Gaudreau, Louis

    Nous presentons dans cette these une etude detaillee du moment magnetique intrinseque de l'electron, i.e. le spin electronique, incluant la manipulation quantique coherente des etats de spin de trois electrons couples. A cette fin, nous utilisons des boites quantiques laterales pour confiner les electrons. Ces nano-structures, d'une grandeur autour de 1 pm, permettent de confiner un nombre precis d'electrons de facon controlee, allant jusqu'a zero electrons. Les developpements technologiques et d'ingeniosite durant la derniere decennie ont permis de coupler trois boites quantiques, ainsi l'interaction entre plusieurs electrons confines peut etre controlee comme par exemple le couplage quantique tunnel et l'interaction d'echange entre les spins de chacun d'entre eux. A l'aide de boites quantiques couplees, il est possible de realiser des experiences dans plusieurs domaines de la physique moderne : les etats up et down du spin des electrons confines peuvent etre utilisees comme etats quantiques binaires (qubits) dans le domaine de l'informatique quantique, la non-localite quantique peut etre testee en separant spatialement deux electrons enchevetres, il est possible de creer des 'courants de spin enchevetres' utiles en spintronique, et bien d'autres. La manipulation coherente des etats de spin du systeme a trois electrons se fait de facon purement electrique grace a des pulses a haute frequence qui permettent d'augmenter le couplage entre les electrons et de faire la mesure de l'etat resultant apres la manipulation. Nous utilisons l'interaction hyperfine entre les spins des electrons et ceux des noyaux du cristal dans lequel ils resident pour creer les rotations quantiques entre les etats, notamment les etats |Q +3/2> et (D+1/2>. Les resultats obtenus indiquent un temps de coherence de l'ordre de 10 ns. Ces experiences demontrent un niveau de controle sans precedant de boites quantiques triples et pavent la voie vers des nano-structures plus sophistiquees dans

  14. Expression of insecticide resistance in immature life stages of Triatoma infestans (Hemiptera: Reduviidae).

    PubMed

    Roca-Acevedo, Gonzalo; Picollo, María Inés; Santo-Orihuela, Pablo

    2013-07-01

    The aim of the current study was to investigate the susceptibility to the insecticide deltamethrin and the expression of resistance to this insecticide in developing eggs and neonate nymphs of Triatoma infestans from two areas of Argentina (Campo Largo) and Bolivia (Entre Ríos), where resistance to this pyrethroid is suspected. Both nymphal populations showed resistance to deltamethrin, with lower resistance ratio for Entre Ríos (173X) than Campo Largo (1108X). Efficacy of deltamethrin on 4-, 7-, and 12-d-old eggs for both field populations were significantly lower than efficacy on eggs of the susceptible strain. This is the first documented evidence of the expression of pyrethroid resistance during the embryonic development of Chagas Disease vectors. PMID:23926779

  15. Buracos negros primordiais e astrofísica observacional

    NASA Astrophysics Data System (ADS)

    Custódio, P. S.; Horvath, J. E.

    2003-02-01

    A história da física contemporânea é pródiga em grandes descobertas (a Relatividade e a Mecânica Quântica entre as mais importantes) até meados dos anos '30. O peso destes desenvolvimentos é tão grande que outros feitos de grande porte (por exemplo, a teoria da nucleossíntese nas estrelas) são geralmente considerados como "filhotes" dos primeiros, ao menos na imaginação popular. Porém, algumas exceções à regra não-escrita são dignas de menção. Entre estas últimas está a descoberta por S.W.Hawking e colaboradores das propriedades de emissão dos buracos negros, trabalho que iniciou uma disciplina com vida própria denominada Termodinâmica de Buracos Negros.

  16. Sécurité au-delà des mythes et des croyances

    ScienceCinema

    None

    2011-10-06

    Présentation orale en français, support visuel en français et en anglais. La pire des failles de sécurité est l'impression de sécurité. Le décalage entre la compréhension que l?on a des technologies utilisées, et leurs potentiels réels, ainsi que l'impact potentiellement négatif qu'elles peuvent avoir sur nos vies, n'est pas toujours compris, ou pris en compte par la plupart d'entre-nous. On se contente de nos perceptions pour ne pas avoir à se confronter à la réalité... Alors qu'en est-il vraiment ? En matière de sécurité qui de l'humain ou des technologies a le contrôle ?

  17. Search for the Higgs Boson and for Anomalous Quartic Gauge Boson Couplings in the WW Channel with Dielectron Events with the D0 Experiment at the Tevatron; Recherche du boson de Higgs et de couplages de jauge quartiques anormaux dans le canal WW en électrons dans l'expérience D0 au Tevatron

    SciTech Connect

    Chapon, Emilien

    2013-01-01

    Le paysage de la physique des particules a subi des changements majeurs entre le début de cette thèse, en septembre 2010, et sa n en juin 2013. On peut notamment qualier l'année 2012 de date-clé dans l'histoire de la physique des particules. En 2012, une nouvelle particule a été découverte au LHC [1, 2], dont la majeure partie de la communauté s'accorde aujourd'hui à dire qu'il s'agit très probablement du boson de Higgs. Cet événement est intervenu peu après une sorte de passage de relais entre le Tevatron, arrêté le 30 septembre 2011, et le LHC, dont les toutes premières collisions sont intervenues le 23 novembre 2009.

  18. El Planetario Móvil de la Municipalidad de la ciudad de Córdoba

    NASA Astrophysics Data System (ADS)

    Suárez, F. E.; Campos, M.; Goldes, G. V.; Carranza, G. J.; Romero, R.; Juri, H. O.

    Se describen las características y operatoria del nuevo Planetario Móvil. Se trata de un equipamiento de propiedad de la Municipalidad de la Ciudad de Córdoba que es operado por personal y en el predio de la Universidad, en virtud de un convenio suscripto entre ambas instituciones. El planetario consta de una cúpula inflable y de un proyector con programas alternativos que incluyen temas de astronomía, geografía, biología y medio ambiente, entre otros. En la actualidad opera en las instalaciones del Pabellón Argentina de la Ciudad Universitaria y recibe delegaciones escolares de todo el territorio provincial. El Planetario Móvil es parte de un proyecto más amplio de divulgación científica en el cual interactúan la Universidad y el Municipio.

  19. Astronomía Mocoví

    NASA Astrophysics Data System (ADS)

    López, A.; Giménez Benitez, S.; Fernández, L.

    El presente trabajo, es una revisión crítica de la astronomía en la cultura Mocoví, aportando a lo realizado previamente por Lehmann Nistche (Lehmann Nistche, 1924 y 1927) el resultado de nuestro trabajo de campo. Un mayor conocimiento de las cosmovisiones de las etnias de esta área es fundamental para una mejor comprensión de la dispersión de las ideas cosmológicas entre los pueblos aborígenes americanos, dada la importancia del corredor chaqueño como conexión entre las altas culturas andinas, la mesopotamia y la región pampeana (Susnik, 1972). Para ello se realiza una comparación con otras cosmovisiones del área americana. Nuestro aporte se enmarca dentro de las actuales líneas de trabajo mundialmente en desarrollo en Astronomía en la Cultura.

  20. Projet de classification de spectres stellaires IUE à basse résolution par système expert.

    NASA Astrophysics Data System (ADS)

    Imadache, A.

    Le project d'étude porte sur l'utilisation de l'intelligence artificielle en vue d'établir une classification de spectres IUE. Pour la réalisation de ce projet, des liens de collaboration ont été établis entre l'Observatoire Astronomique de Strasbourg et l'équipe ST-ECF à l'ESO.

  1. Significado de los cambios en el cuello uterino: Guía para la salud de la mujer

    Cancer.gov

    Explica qué es la infección por el VPH; los exámenes de detección del cáncer de cuello uterino, entre ellos la prueba de Pap, la prueba del VPH y la prueba conjunta de Pap y del VPH; las pautas para los exámenes de detección; los posibles resultados de la

  2. Fluctuations quantiques et instabilites structurales dans les conducteurs a basse dimensionalite

    NASA Astrophysics Data System (ADS)

    Dikande, Alain Moise

    Un engouement particulier s'est manifeste ces dernieres annees pour les systemes electroniques fortement correles, ce en rapport avec l'immense richesse de leurs proprietes physiques. En general, ces proprietes sont induites par la presence d'interactions entre electrons qui, combinees a la structure du reseau moleculaire, donnent parfois lieu a une tres grande variete de phases electroniques et structurales ayant des incidences directes sur les phenomenes de transport dans ces materiaux. Les systemes electroniques couples a un reseau moleculaire et designes systemes electron-phonon font partie de cette classe de materiaux qui ont recemment capte l'attention, en raison notamment de la competition entre plusieurs echelles d'energie dans un environnement caracterise par une forte anisotropie cristalline et une dynamique moleculaire assez importante. En effet, en plus des proprietes electroniques et structurales particulieres la dimensionalite de ces systemes contribue egalement a leur richesse. Ainsi, une tres forte anisotropie structurale peut rehausser de facon considerable l'importance des interactions entre electrons et entre molecules constituant le reseau au point ou la physique du systeme soit regie par de tres fortes fluctuations. Ce dernier contexte est devenu un domaine a part de la physique des systemes fortement correles, a savoir celui des les phenomenes critiques quantiques . Parmi les systemes electron-phonon, on retrouve les composes inorganique KCP et organique TTF-TCNQ decouverts durant les annees 70, et explores en profondeur a cause de leur tendance vers une instabilite du type onde de densite de charge a basse temperature. Ces composes, en general designes systemes de Peierls en reference a l'instabilite de leurs structures electroniques regie par le reseau moleculaire, ont recemment connu un regain d'interet a la lumiere des nouveaux developpements dans les techniques de caracterisation des structures electroniques ainsi que sur le plan de

  3. U.S. commercial space policies - Implications for developing countries

    NASA Technical Reports Server (NTRS)

    Gillam, Isaac T., IV; Stone, Barbara A.

    1987-01-01

    Recent U.S. policy developments on the commercial use of space are summarized and their international implications are considered. Attention is given to successful applications of technology developed in space, including an implantable cancer medication system, an implantable defibrillator, an ultrasonic residual stress monitor, and aquaculture treatment techniques. NASA projects involving bioengineering and rehabilitation applications are summarized, and plans to investigate high-temperature superconductors in space are addressed. Recent agreements entred into by NASA for space commercial studies are reviewed.

  4. Nuevas Galaxias Seyfert 1 Australes

    NASA Astrophysics Data System (ADS)

    Maza, J.; Ruiz, M. T.

    1987-05-01

    En 1984 se inició una extensión del "survey" de Tololo que de- sarrollara en 1975 Smith, con la cámara Curtis-Schmidt y el prisma UV delgado. Utilizando placas IIIaJ horneadas, sin filtro, expues tas 90 minutos sin ensanchamiento se han obtenido a la fecha más de 150 placas que cubren la zona entre -20° y -45° a latitudes galácticas mayores de 20°; se presenta un detalle de las franjas que comprende el survey Calan-Tololo, indicando el grado de completitud de las mismas. Se ha encontrado un gran número de galaxias con líneas de emisión entre las cuales las más frecuentes, más de 300, son galaxias irregulares con formación estelar violenta ("starburst galaxies"). Se ha encontrado un número de cuasares cercano a 100; casi todos ellos tienen la linea Lyman alfa en la zona entre 3300 y 5300 A, que corresponde a un rango de corrimientosal rojo 1.7< z <3.3 el cuasar con mayor corri- miento al rojo encontrado a la fecha en el survey tiene z = 3.1. La información detallada sobre cuasares y galaxias tipo "starburst" será presentada en otro lugar. Entre los objetos más interesantes encontrados en el survey Calán- Tololo destacan unas 50 nuevas galaxias Seyfert 1. Estas galaxias han sido encontradas por su fuerte exceso UV y su brillante núcleo, más que por sus intensas lineas de emisión. Hemos observado espectroscópicamente, en el Observatorio Interamericano de Cerro Tololo, 37 de ellas para las cuales se presentan cartas de identificación, coordenadas y los datos espectroscópicos obtenidos.

  5. High-end dining in the nineteenth-century United States.

    PubMed

    Freedman, Paul; Warlick, James

    2011-01-01

    A look at what fine restaurants served in mid-nineteenth century America, using the New York Public Library’s collection of menus from the Fifth Avenue Hotel in New York City for the years 1859 to 1865. With particular paid attention to the entrée category, 1,250 menus were analyzed. There are 900 different dishes mentioned, and the article discusses what were the most popular and the setting and customs governing such meals. PMID:21591310

  6. DISYUNTIVAS EN LAS CONCEPCIONES SOBRE AUTONOMÍA Y BENEFICENCIA QUE AFECTAN LA TERAPÉUTICA DEL INTENTO SUICIDA1

    PubMed Central

    Mondragón, Liliana; Monroy, Zuraya; Ito, Ma. Emily; Medina-Mora, Dra. Ma. Elena

    2010-01-01

    El objetivo del trabajo es conocer las disyuntivas entre los principios de beneficencia y autonomía, que se presentan en la relación médico-paciente, durante la terapéutica del intento de suicidio. La investigación se realizó en dos hospitales psiquiátricos de la Ciudad de México. La muestra incluyó a tres sujetos con intento de suicidio, mayores de 18 años, que eran atendidos en consulta externa a causa de una lesión autoinfligida en el último año, y a tres psiquiatras que trataban a estos pacientes. La información se obtuvo previo consentimiento informado en entrevistas individuales. Se llevó a cabo un análisis de discurso argumentado para encontrar los significados que los participantes otorgaron a los principios bioéticos y las posibles disyuntivas entre éstos. Las discordancias entre la beneficencia y la autonomía estuvieron relacionadas con el beneficio del tratamiento, el respeto por los valores y las creencias de los pacientes, entre otros. Este trabajo presenta consideraciones éticas relevantes en el escenario clínico, al ofrecer al psiquiatra un análisis bioético que le permita actuar de acuerdo con la beneficencia y respetando la autonomía del paciente frente a casos de intento de suicidio y, de esta forma procurar una mejor atención para ellos. PMID:20830214

  7. Excrétion rénale des ions divalents après homotransplantation rénale

    PubMed Central

    Cartier, F.; Popovtzer, M. M.; Robinette, J.; Pinggera, W. F.; Halgrimson, C. G.; Starzl, T. E.

    2010-01-01

    RÉSUMÉ L’élimination rénale des ions divalents, celle du Na et du K, ont été étudiées de façon comparative dans les suites immédiates de l’homotransplantation rénale chez 6 patients. Durant la période initiale polyurique (> 3ml/mn), le taux d’excrétion du Ca filtré (Cca/Ccr), du Mg, du P, du Na et du K, est élevé et il existe une corrélation étroite et quasi constante entre l’élimination du Ca, du Mg et du Na ; la corrélation n’est pas constante entre l’élimination du Na et du K, du Mg et du K. Pendant les deux jours suivants, le taux d’excrétion diminue, sauf pour le P ; il existe encore une corrélation entre l’excrétion du Ca, du Mg et du Na, non entre celle du Na et du K, du Mg et du K. L’excrétion du Ca l’emporte sur celle du Na au cours de la première période, non au cours de la seconde. A la lumière de ces données, on envisage l’intervention possible de divers facteurs, tels l’inflation hydrosique et l’hyperazotémie préalables, l’ischémie rénale contemporaine de la transplantation, les effets de la dénervation rénale, du traitement cortisonique, de l’hyperparathyroïdie et ceux des modifications circulatoires rénales. PMID:4574592

  8. 25th Birthday Cern- Amphi

    ScienceCinema

    None

    2011-04-25

    Cérémonie du 25ème anniversaire du Cern avec 2 orateurs: le Prof.Weisskopf parle de la signification et le rôle du Cern et le Prof.Casimir(?) fait un exposé sur les rélations entre la science pure et la science appliquée et la "big science" (science légère)

  9. Espectroscopia del Cometa Halley

    NASA Astrophysics Data System (ADS)

    Naranjo, O.; Fuenmayor, F.; Ferrin, L.; Bulka, P.; Mendoza, C.

    1987-05-01

    Se reportan observaciones espectroscópicas del cometa Halley. Los espectros fueron tomados usando el espectrógrafo del telescopio reflector de 1 metro del Observatorio Nacional de Venezuela. Se utilizó óptica azul, con una red de difracción de 600 lineas/min, obteniéndose una dispersión de 74.2 A/mm y una resolución de 2.5 A, en el rango espectral de 3500 a 6500 A. Seis placas fueron tomadas con emulsión IIa-O y dos con IIa-D. Los tiempos de exposición fueron entre 10 y 150 minutos. El cometa se encontraba entre 0.70 y 1.04 UA del Sol, y entre 1.28 y 0.73 UA de la Tierra. Las emisiones más prominentes en el espectro, son las del CN, C2, y C3. Otras emisiones detectadas corresponden a CH, NH2 y Na. Los espectros muestran un fuerte continuo, indicando un contenido significativo de polvo. Se detectó mayor intensidad del contínuo, en la dirección anti solar, lo cual es evidencia de la cola de polvo.

  10. Impact of nutritional labelling on 10-d energy intake, appetite perceptions and attitudes towards food.

    PubMed

    Carbonneau, Elise; Perron, Julie; Drapeau, Vicky; Lamarche, Benoît; Doucet, Éric; Pomerleau, Sonia; Provencher, Véronique

    2015-12-28

    The purpose of this study was to investigate the impact of nutritional labelling on energy intake, appetite perceptions and attitudes towards food. During a 10-d period, seventy normal-weight (BMI<25 kg/m2) and seventy-one obese women (BMI≥30 kg/m2) were given three meals per d under ad libitum conditions. Participants were randomly assigned to one of three experimental labelling groups in which the only difference was the label posted on lunch meal entrée: (1) low-fat label, (2) energy label (energy content of the entrée and average daily needs) and (3) no label (control). Average energy intake was calculated by weighing all foods before v. after daily consumption. Hunger and fullness perceptions were rated on visual analogue scales immediately before and after each meal. Satiety efficiency was assessed through the calculation of the satiety quotient (SQ). The appreciation and perceived healthiness of the lunch entrées were rated on eight-point Likert scales. There was no difference in energy intake, SQ and attitudes towards food between the three labelling groups. Fasting hunger perception was higher in the low-fat label group compared with the two others groups (P=0·0037). No interactions between labelling groups and BMI categories were observed. In conclusion, although labelling does not seem to influence energy intake, a low-fat label may increase women's fasting hunger perceptions compared with an energy label or no label. PMID:26439975

  11. Les fistules œsotrachéales congénitales isolées à propos de 2 cas

    PubMed Central

    El Biache, Imad; Lechqar, Maryem; Rami, Mohammed; Bouabdallah, Youssef

    2014-01-01

    Les auteurs rapportent 2 cas de fistules oesotrachéales isolées sans atrésie de l'oesophage, colligés au service de chirurgie pédiatrique au CHU Hassan II de Fès au Maroc entre 2008 et 2013. Il s'agit d'une anomalie rare représentée par un fin canal ascendant entre l'oesophage et la face postérieure de la trachée, à la hauteur du défilé cervico-thoracique. Elle se manifeste cliniquement par une symptomatologie respiratoire parfois digestive. Le diagnostic a été confirmé par le transit oesophagien dans les 2 cas et a permis aussi de déterminer le siège de la fistule. Le traitement était chirurgical, il a permis de supprimer la communication anormale entre l'oesophage et la trachée par un abord cervical avec interposition musculaire dans les 2 cas. Les suites post-opératoires et l’évolution à long terme étaient simples. Le but de ce travail est d'exposer les différents moyens diagnostique et thérapeutique. PMID:25328600

  12. Development and evaluation of bioregenerative menus for Mars habitat missions

    NASA Astrophysics Data System (ADS)

    Cooper, Maya R.; Catauro, Patricia; Perchonok, Michele

    2012-12-01

    Two 10-day menus were developed in preparation for a Mars habitat mission. The first was built on the assumption, as in previous menu development efforts for closed ecological systems, that the food system would be vegetarian, whereas the second menu introduced shelf-stable, prepackaged meat and entrée items from the current International Space Station (ISS) food system. Both menus delivered an average of 3000 cal daily but the macronutrient proportions resulted in an excess of carbohydrates and dietary fiber per mission nutritional recommendations. Generally, the individual recipes comprising both menus were deemed acceptable by internal sensory panel (average overall acceptability=7.4). The incorporation of existing ISS entrée items did not have a significant effect on the acceptability of the menus. In a final comparison, the food system upmass, or the amount of food that is shipped from the Earth, increased by 297 kg with the addition of prepackaged entrées to the menu. However, the addition of the shipped massed was counterbalanced by a 864 kg reduction in required crops. A further comparison of the crew time required for meal preparation and farming, food system power requirements, and food processing equipment mass is recommended to definitively distinguish the menus.

  13. Production de faisceaux EPR à l'aide d'un oscillateur paramétrique optique à auto-verrouillage de phase

    NASA Astrophysics Data System (ADS)

    Longchambon, L.; Laurat, J.; Treps, N.; Ducci, S.; Maître, A.; Coudreau, T.; Fabre, C.

    2002-06-01

    Nous étudions théoriquement les propriétés quantiques des faisceaux lumineux continus orthogonalement polarisés émis par un Oscillateur Paramétrique Optique (OPO) de type II contenant une lame biréfringente. Quand les axes optiques de la lame sont tournés par rapport à ceux du cristal paramétrique, un couplage apparaît entre les faisceaux signal et complémentaire qui entraîne un verrouillage de phase entre les deux modes et un fonctionnement à dégénérescence de fréquence à l'intérieur d'une zone d'accrochage. Les corrélations quantiques entre les deux faisceaux permettent de définir les zones dans l'espace des paramètres expérimentaux où les différents critères associés à l'intrication EPR utilisés en information quantique sont vérifiés.

  14. Estudio ab initio del mecanismo de la reacción HSO + O3

    NASA Astrophysics Data System (ADS)

    Nebot Gil, I.

    La reacción entre el radical HSO y el ozono ha sido ampliamente estudiada desde el punto de vista experimental debido a la importancia que tiene el radical HSO en la oxidación de los compuestos de azufre reductores y a que puede contribuir a la producción de H2SO4 [1-4]. Se realizaron diversos estudios teóricos sobre la cinética de la reacción entre el radical HSO y el ozono. La reacción del HSO con el ozono presenta tres canales diferentes : HSO + O3 &rightarrow &HSO2 + O2 &rightarrow &HS + 2 O2 &rightarrow &SO + OH + O2 La controversia existente entre los grupos experimentales sobre cuál de las tres vías es la predominante, se ha resuelto mediante un estudio teórico de todas ellas utilizando métodos ab initio. La estructura de todos los reactivos, productos, intermedios y estados de transición ha sido optimizada a nivel ab initio utilizando los métodos UMP2 /6-31G** y QCISD/6-31G**.

  15. CHOQUES AGREGADOS E INVERSIÓN EN CAPITAL HUMANO: EL LOGRO EDUCATIVO SUPERIOR DURANTE LA DÉCADA PERDIDA EN MÉXICO

    PubMed Central

    Peña, Pablo A.

    2014-01-01

    Este artículo documenta una respuesta agregada negativa del logro educativo superior (más de 12 años de escolaridad) en México a la recesión de 1982–83 y el estancamiento que le siguió. La respuesta no fue homogénea entre géneros, regiones y entornos familiares. Los hombres experimentaron una caída en el logro mientras que las mujeres experimentaron un crecimiento más lento. En promedio, los estados con un mayor logro antes del choque experimentaron mayores caídas. La respuesta entre distintos entornos familiares no presenta un patrón claro. Sin embargo, el efecto negativo en el logro se observa incluso entre hermanos. La evidencia sugiere una historia por el lado de la demanda: la caída en el ingreso de los hogares parece ser el determinante de la caída/desaceleración del logro educativo superior. La conclusión es que la recesión y la falta de crecimiento que le siguió tuvieron un efecto negativo importante y duradero en la formación de capacidades en México. PMID:25328251

  16. La dinámica demográfica y la desigualdad educativa en Méxicoa

    PubMed Central

    Giorguli Saucedo, Silvia E.; Vargas Valle, Eunice D.; Ulloa, Viviana Salinas; Hubert, Celia; Potter, Joseph E.

    2015-01-01

    En este trabajo se presenta una investigación sobre el vínculo entre los procesos educativos y la dinámica demográfica en México. La tradición del pensamiento sobre población y desarrollo ha partido de la hipótesis de que el ritmo de crecimiento poblacional, el tamaño de las familias y la migración influyen sobre la acumulación de capital humano entre la población en edades escolares. Se explora aquí la relación del desempeño educativo de los jóvenes entre 14 y 23 años y la razón de dependencia juvenil, la fecundidad adolescente y la migración interna e internacional; para ello se utilizan datos agregados a escala municipal del año 2000. El análisis incluye indicadores de la oferta educativa municipal basados en estadísticas administrativas de la SEP. PMID:26146427

  17. EL PROTEOMA DEL TEJIDO ADIPOSO SUBCUTÁNEO MUESTRA HETEROGENEIDAD ANATÓMICA

    PubMed Central

    Martos-Moreno, G.A.; Sackmann-Sala, L.; Berryman, D.E.; Blome, D.W.; Argente, J.; Kopchick, y J.J.

    2015-01-01

    Introducción El tejido adiposo blanco (TAB) subcutáneo (Sc) humano podría variar dependiendo de su localización anatómica, con diferencias en su perfil proteómico. Pacientes y métodos Se obtuvieron aspirados de TAB-Sc de seis mujeres con IMC >25 kg/m2, sometidas a liposucción. Dicho TAB-Sc se obtuvo de seis localizaciones anatómicas: abdominal superior e inferior, muslo, dorsal, flanco y cadera, analizándose su perfil proteómico mediante electroforesis bidimensional. En muslo y abdomen superior se compararon, además, las muestras obtenidas de las dos capas del TAB-Sc (profunda y superficial). Resultados Se detectaron 21 proteínas que mostraban una intensidad de expresión diferente entre las seis localizaciones anatómicas y 14 entre las capas superficial y profunda de una misma región. Entre las proteínas identificadas se incluyen: vimentina (proteína estructural); proteínas “heat-shock” (HSPs), superóxido-dismutasa, (estrés/chaperoninas); proteína fijadora de ácidos grasos 4 (FABP-4) y alfa-enolasa (metabolismo lipídico y de los hidratos de carbono, respectivamente) y ATP-sintetasa (producción de energía). Entre las regiones estudiadas, el TAB-Sc dorsal mostraba un perfil proteómico particular, con menor expresión de proteínas implicadas en la producción de energía y metabolismo (ATP-sintetasa, alfa-enolasa, HSPs y FABP-4) que el resto de regiones. Conclusiones Los niveles de expresión de diversas proteínas en el TAB-Sc humano no son homogéneos, difiriendo entre localizaciones anatómicas. Esto sugiere la existencia de diferencias funcionales en el TAB-Sc de acuerdo con su localización anatómica, lo que debe considerarse antes de asumir la extrapolación de los datos derivados del TAB-Sc de una determinada localización al de otras partes de la anatomía. PMID:23228439

  18. Presentación del estudio “Links” de hombres que tienes sexo con hombres en Buenos Aires, Argentina

    PubMed Central

    Carballo-Diéguez, Alex; Ávila, María M; Balán, Iván C.; Marone, Rubén; Pando, María A.; Barreda, Victoria

    2011-01-01

    Resumen Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos (“teteras”), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA. PMID:25264397

  19. Conocimientos y autoeficacia asociados a la prevención del VIH y SIDA en mujeres chilenas

    PubMed Central

    Villegas Rodríguez, Natalia; Ferrer Lagunas, Lilian Marcela; Cianelli Acosta, Rosina; Miner, Sarah; Lara Campos, Loreto; Peragallo, Nilda

    2014-01-01

    Resumen Objetivo Evaluar la relación existente entre conocimientos y autoeficacia asociados al VIH/SIDA en mujeres chilenas en desventaja social. Metodología Estudio correlacional, que utiliza la medición basal del estudio “Testeando una intervención en VIH y SIDA en mujeres chilenas”, realizada entre 2006 y 2008, que tiene una muestra de 496 mujeres entre 18 y 49 años residentes en dos comunas de Santiago de Chile. Las participantes respondieron un cuestionario estructurado aplicado por entrevistadoras entrenadas. Este cuestionario incluyó preguntas sobre datos sociodemográficos, escala de conocimientos de conductas de riesgo y autoeficacia, entre otros. Resultados Edad promedio de 32.3±9.1 años, 72.2% vive con su pareja y 42.7% poseen educación media completa. La puntuación media de los conocimientos de la infección por el VIH fue de 8.9±2.5, mientras que para las tres escalas empleadas para medir autoeficacia fueron: “Normas de los pares” =9.8±3.6, “Intención de reducir conductas de riesgo” =12.2±3.6 y “Self Efficacy Form”=20.2±4.7. Los conocimientos tuvieron una correlación positiva débil con la “intención de reducir conductas de riesgo” (r=0.19; p<0.0001) y con la escala “Self Efficacy Form” (r=0.34; p<0.0001), pero no se relacionaron con las “normas de los pares en cuanto a relaciones sexuales seguras” (r=0.13; p=0.78). Conclusión Existe una débil correlación positiva entre el nivel de conocimientos sobre el VIH/SIDA y la autoeficacia en mujeres chilenas en desventaja social. PMID:25284914

  20. Presentación del estudio "Links" de hombres que tienes sexo con hombres en Buenos Aires, Argentina.

    PubMed

    Carballo-Diéguez, Alex; Avila, María M; Balán, Iván C; Marone, Rubén; Pando, María A; Barreda, Victoria

    2011-03-01

    Estudios previos en Buenos Aires reportaron altas prevalencias de HIV entre HSH, con valores que oscilan entre 9 y 14% durante casi 10 años de continuo testeo. El objetivo principal de este estudio fue la evaluación de factores relacionados al comportamiento de alto riesgo para transmisión del HIV entre HSH entre los que se incluyen el conocimiento y factores emocionales, socioculturales y ambientales. Por otro lado se realizó la estimación de prevalencia e incidencia de HIV utilizando RDS (Respondent Driven Sampling), así como la presencia de otras infecciones de transmisión sexual. Por último se evaluaron los hábitos de testeo para HIV indagando que factores facilitan o impiden su realización. El estudio constó de dos fases, en primer lugar una fase cualitativa y posteriormente una fase cuantitativa con una duración total de 4 años y medio. Durante la fase cualitativa se realizaron 44 entrevistas individuales en profundidad, 8 grupos focales y 10 observaciones etnográficas (hoteles, baños públicos ("teteras"), cines pornográficos, fiestas privadas, dark rooms y discotecas). Durante la fase cuantitativa del estudio se realizó el reclutamiento de 500 participantes que provinieron de la Ciudad Autónoma de Buenos Aires, así como del Gran Buenos Aires. El reclutamiento se comenzó con 16 participantes llamados semillas. Se realizó el diagnóstico de infección por HIV, hepatitis B y C (HBV y HCV), Treponema pallidum, Virus Papiloma Humano (HPV) y Chlamidias. La colaboración establecida entre los grupos de trabajo enfocados en áreas diversas posibilitó el abordaje conjunto de nuevas estrategias de investigación antes no exploradas en nuestro país. Los resultados más relevantes de esta investigación serán progresivamente publicados en sucesivos números de Actualizaciones en SIDA. PMID:25264397

  1. Estrategia innovadora enfocada en parejas del mismo sexo para disminuir la infección del VIH en hombres Latinos

    PubMed Central

    Martinez, Omar; Wu, Elwin; Sandfort, Theo; Shultz, Andrew Z.; Capote, Jonathan; Chávez, Silvia; Moya, Eva; Dodge, Brian; Morales, Gabriel; Porras, Antonio; Ovejero, Hugo

    2014-01-01

    Resumen El VIH es un problema de salud importante dentro de la comunidad latina de los Estados Unidos. Gracias a los esfuerzos de prevención, los niveles de contagio entre los latinos se han mantenido estables por más de una década. Sin embargo, esta población sigue siendo afectada a niveles muy altos, en particular entre hombres que tienen sexo con hombres (HSH), de origen latino y que hablan principalmente el idioma español. Existen varios factores que contribuyen a la transmisión del VIH entre esta población, como son: el uso de drogas; la violencia dentro de la pareja; la presencia de infecciones de transmisión sexual; relaciones sexuales sin protección, dentro y fuera de la pareja; el evadir la búsqueda de recursos (prueba y tratamiento adecuado) por temor a ser discriminado o por su estatus migratorio; la escasez de recursos económicos o estado de pobreza y los patrones relacionados a la migración. En particular, Investigaciones Epidemiológicas de Comportamientos han determinado: cómo algunas dinámicas en parejas están directamente asociadas a los comportamientos sexuales de riesgos. En consecuencia, es necesaria mayor investigación para identificar esas dinámicas, y a su vez, realizar intervenciones dirigidas a la reducción de conductas de riesgo enfocadas en parejas de hombres del mismo sexo. En este escrito, se describe la importancia del uso de las relaciones de pareja como estrategia en la reducción de la trasmisión del VIH/SIDA en HSH de origen latino y que hablan principalmente el idioma español en los Estados Unidos. PMID:25580466

  2. Le syndrome des jambes sans repos: fréquence et facteurs de risque chez l'hémodialysé

    PubMed Central

    Soumeila, Illiassou; Keita, Salia; Elhassani, Anis; Sidibé, Mohamed; Alaoui, Khadija; Kabbali, Nadia; Arrayhani, Mohamed; Sqalli, Tarik

    2015-01-01

    Le syndrome des jambes sans repos (SJSR) ou syndrome d'impatience musculaire est un trouble moteur caractérisé par des sensations désagréables dans les jambes. Les causes sont mal connues et sa fréquence est estimée entre 25% et 75% chez les hémodialysés. Il s'agit d'une étude transversale monocentrique menée au centre d'hémodialyse du CHU Hassan II de Fès (hôpital Al Ghassani) entre décembre 2012 et janvier 2013. Nous avons défini le syndrome de jambes sans repos selon la définition de l'international restless legs study group de 2003 reposant sur 4 critères essentiels au diagnostic. L'international restless legs syndrome scale (IRLES) a été coté par un même néphrologue pour mesurer la sévérité du syndrome des jambes sans repos. 84 hémodialysés ont répondu au questionnaire avec 41,7% de cas de SJSR dont 6,6% de formes graves. Nous avons retrouvé une association entre le SJSR et la carence martiale p(0,018), la néphropathie initiale p(0,041), l'HTA p(0,026) et le sexe féminin p(0,024). Dans notre série, il ressort que la carence martiale et l'HTA sont les principaux facteurs de risque modifiables de ce syndrome chez nos patients. Les facteurs traditionnels comme le tabagisme, l’âge supérieur à 50 ans et la dialyse inadéquate ne sont pas associés à ce trouble dans notre série. PMID:26015849

  3. [In Process Citation].

    PubMed

    Miqueleiz Autor, E; Lostao, L; Reques, L; Giráldez-García, C; Regidor, E

    2016-01-01

    RESUMENFundamento. Mostrar las desigualdades en mortalidad prematura según indicadores de bienestar material en Navarra.Método. Todos los ciudadanos menores de 75 años residentes en Navarra en 2001 fueron seguidos durante 7 años para conocer su estado vital. El indicador de posición socioeconómica usado ha sido la superficie de la casa y el número de vehículos del hogar. Se han estimado las tasas de mortalidad general y por causa de muerte ajustadas por edad según estos indicadores.Resultados. La razón de tasas por todas las causas de muerte en las categorías inferiores es según la superficie de la vivienda de 1,14 (IC 95%: 1,05-1,24) y 1,25 (IC 95%: 1,18-1,32) en mujeres y hombres respectivamente y de 1,46 (IC 95%: 1,36-1,57) y 1,97 (IC 95%: 1,89-2,05) según el número de vehículos. El sida es la causa de muerte que presenta una mayor diferencia en las tasas de mortalidad entre las personas con menor y mayor bienestar material. Otras causas de muerte con elevada diferencia en las tasas de mortalidad son las enfermedades digestivas y la diabetes mellitus en mujeres y las enfermedades del aparato digestivo y respiratorio en hombres.Conclusiones. La tasa de mortalidad en la población navarra muestra un gradiente inverso con el bienestar material, a excepción de algunas localizaciones de cáncer. Este gradiente es mayor entre los hombres que entre las mujeres.Palabras clave. Mortalidad prematura. Bienestar material. PMID:27125605

  4. [In Process Citation].

    PubMed

    Wang, Bingsong; Li, Yijun; Wu, Xiaolu; Liu, Qingqing; Tang, Xue; Wang, Zuo

    2016-01-01

    Objetivos: oligoelementos como zinc (Zn), hierro (Fe) y cobre (Cu) tienen una influencia significativa en el mantenimiento de la función inmune y del metabolismo normales; modulan la función immune e influyen en la susceptibilidad del organismo ante infecciones. Pero la relación entre trazas de estos elementos y la bronconeumonía resultó incierta. Métodos: en este estudio fueron incluidos 28 niños con bronconeumonía y 46 niños sanos agrupados por edad. Se determinaron los niveles de Zn, Cu, Fe, calcio (Ca) y/o magnesio (Mg) en el suero de los niños con bronconeumonía y sin ella mediante espectrofotometría de absorción atómica. Resultados: los resultados muestran que varios niveles de microelementos como Zn, Ca, Mg y Fe en el grupo con bronconeumonía son menores que en el grupo control. En el grupo de niños con bronconeumonía el nivel de Ca en el suero está asociado positivamente con el zinc (Zn) (p < 0,05) y el hierro (Fe) (p < 0,05), mientras que hay una correlación positiva entre el cobre (Cu) y el calcio (Ca) (p < 0,05), magnesio (mg) (p < 0,05). Conclusión: el nivel de oligoelemento en el suero puede estar asociado con el riesgo de bronconeumonía entre los niños. PMID:27238780

  5. Focusing on fast food restaurants alone underestimates the relationship between neighborhood deprivation and exposure to fast food in a large rural area

    PubMed Central

    2011-01-01

    Background Individuals and families are relying more on food prepared outside the home as a source for at-home and away-from-home consumption. Restricting the estimation of fast-food access to fast-food restaurants alone may underestimate potential spatial access to fast food. Methods The study used data from the 2006 Brazos Valley Food Environment Project (BVFEP) and the 2000 U.S. Census Summary File 3 for six rural counties in the Texas Brazos Valley region. BVFEP ground-truthed data included identification and geocoding of all fast-food restaurants, convenience stores, supermarkets, and grocery stores in study area and on-site assessment of the availability and variety of fast-food lunch/dinner entrées and side dishes. Network distance was calculated from the population-weighted centroid of each census block group to all retail locations that marketed fast food (n = 205 fast-food opportunities). Results Spatial access to fast-food opportunities (FFO) was significantly better than to traditional fast-food restaurants (FFR). The median distance to the nearest FFO was 2.7 miles, compared with 4.5 miles to the nearest FFR. Residents of high deprivation neighborhoods had better spatial access to a variety of healthier fast-food entrée and side dish options than residents of low deprivation neighborhoods. Conclusions Our analyses revealed that identifying fast-food restaurants as the sole source of fast-food entrées and side dishes underestimated neighborhood exposure to fast food, in terms of both neighborhood proximity and coverage. Potential interventions must consider all retail opportunities for fast food, and not just traditional FFR. PMID:21266055

  6. Fissuration en relaxation des aciers inoxydables austénitiques au voisinage des soudures

    NASA Astrophysics Data System (ADS)

    Auzoux, Q.; Allais, L.; Gourgues, A. F.; Pineau, A.

    2003-03-01

    Des fissures intergranulaires peuvent se développer au voisinage des soudures des aciers inoxydables austénitiques lorsqu'ils sont réchauffés dans le domaine de température compris entre 500^{circ}C et 700^{circ}C. A ces températures, les contraintes résiduelles post-soudage se relaxent par déformation viscoplastique. Il peut arriver que ces zones proches de la soudure soient tellement fragiles, qu'elles ne puissent accommoder cette faible déformation. Afin de préciser quelles peuvent être les modifications microstructurales qui conduisent à une telle fragilisation, on a examiné les microstructures de ces zones et révélé ainsi un écrouissage résiduel, responsable d'une forte élévation de la dureté. On a pu reproduire par hypertrempe puis laminage entre 400^{circ}C et 600^{circ}C une microstructure similaire. Des essais mécaniques (traction, fluage, relaxation, sur éprouvettes lisses et pré-fissurées) ont été réalisés à 550^{circ}C et à 600^{circ}C sur ces zones affectées simulées et sur un état de référence hypertrempé. Ils ont montré que l'écrouissage diminuait la ductilité dans le domaine de rupture intergranulaire, sans modifier qualitativement le mécanisme d'endommagement. Pendant la pré-déformation les incompatibilités de déformation entre grains conduiraient à l'existence de contraintes locales élevées qui favoriseraient la germination des cavités intergranulaires.

  7. Availability of healthier options in traditional and nontraditional rural fast-food outlets

    PubMed Central

    Creel, Jennifer S; Sharkey, Joseph R; McIntosh, Alex; Anding, Jenna; Huber, J Charles

    2008-01-01

    Background Food prepared away from home has become increasingly popular to U.S. families, and may contribute to obesity. Sales have been dominated by fast food outlets, where meals are purchased for dining away from home or in the home. Although national chain affiliated fast-food outlets are considered the main source for fast food, fast foods are increasingly available in convenience stores and supermarkets/grocery stores. In rural areas, these nontraditional fast-food outlets may provide most of the opportunities for procurement of fast foods. Methods Using all traditional and nontraditio nal fast-food outlets identified in six counties in rural Texas, the type and number of regular and healthiermenu options were surveyed using on-site observation in all food venues that were primarily fast food, supermarket/grocery store, and convenience store and compared with 2005 Dietary Guidelines. Results Traditional fast-food outlets represented 84 (41%) of the 205 opportunities for procurement of fast food; 109 (53.2%) were convenience stores and 12 (5.8%) supermarkets/grocery stores. Although a s imilar variety of regular breakfast and lunch/dinner entrées were available in traditional fast-food outlets and convenience stores, the variety of healthier breakfast and lunch/dinner entrées was significantly greater in fast food outlets. Compared with convenience stores, supermarkets/grocery stores provided a greater variety of regular and healthier entrées and lunch/dinner side dishes. Conclusion Convenience stores and supermarkets/grocery stores more than double the potential access to fast foods in this rural area than traditional fast-food outlets alone; however, traditional fast food outlets offer greater opportunity for healthier fast food options than convenience stores. A complete picture of fast food environment and the availability of healthier fast food options are essential to understand environmental influences on diet and health outcomes, and identify

  8. Aquecimento alfvênico viscoso-resistivo em discos de acresção ao redor de estrelas T Tauri clássicas

    NASA Astrophysics Data System (ADS)

    Santana, W. M.; Vasconcelos, M. J.

    2003-08-01

    Com a crescente disponibilidade de dados observacionais sobre estrelas T Tauri, a busca por modelos mais precisos vem se tornando cada vez maior. Estes modelos devem explicar, entre outras coisas, o mecanismo dissipativo responsável pelo transporte de momento angular no disco de acresção que acredita-se, circunda estas estrelas. O mecanismo mais viável, do ponto de vista teórico, é uma instabilidade MHD conhecida como "instabilidade magnetorotacional ou Balbus-Hawley" (IBH). Esta instabilidade veio mostrar que o campo magnético desempenha um papel importante na evolução destes objetos mas requer, no entanto, um acoplamento mínimo entre o gás e o campo magnético no disco que não é atingido para os valores de temperatura obtidos do modelo padrão. Contudo, alguns mecanismos de aquecimento para o disco precisam ser examinados. Neste trabalho, propomos a dissipação de ondas Alfvén como uma fonte de aquecimento para o disco. Se o gás apresentar uma condutividade elétrica finita e viscosidade, teremos um tipo de amortecimento para as ondas denominado amortecimento viscoso-resistivo que será aqui considerado. Este mecanismo é aplicado ao modelo de disco em camadas. Calculam-se as taxas de aquecimento Alfvênico, a temperatura efetiva do disco bem como as taxas de ionização decorrentes deste aquecimento e do aquecimento gerado pela absorção de raios cósmicos. Comparações com os dados observacionais de Kitamura et. al. (2001) são efetuadas, ressaltando-se os pontos comuns entre suas observações e nossos dados teóricos.

  9. Actitudes de los candidatos y maestros de ciencias en servicio acerca del uso de las herramientas computadorizadas en las clases de ciencias

    NASA Astrophysics Data System (ADS)

    Bayuelo, Ezequiel

    Este estudio examino y comparo las actitudes de los candidatos a maestros de ciencias y los maestros de ciencias en servicio acerca de la utilizacion de las herramientas computadorizadas en las clases de ciencias. Tambien identifico y diferencio el uso que ellos dan a estas herramientas en las clases de ciencias. Este estudio presenta un diseno descriptivo exploratorio. Constituyeron la muestra trescientos diez sujetos que fueron candidatos a maestros de ciencias o maestros de ciencias en servicio. Para recoger los datos se construyo y valido un cuestionario de treinta y un itemes. Se utilizaron las pruebas estadisticas no parametricas Kruskal Wallis y Chi-cuadrado (test de homogeneidad) para establecer las diferencias entre las actitudes de los sujetos con relacion al uso de las herramientas computadorizadas en las clases de ciencias. Los hallazgos evidenciaron que son positivas y muy parecidas las actitudes de los candidatos a maestros y maestros en servicio hacia el uso de las herramientas computadorizadas. No hubo diferencias entre los candidatos y maestros en servicio en terminos de las actitudes de confianza y empatia hacia el uso de las herramientas computadorizadas en las clases de ciencias. En aspectos como el uso del banco de datos bibliografico Eric y el uso de las herramientas computadorizadas en actividades educativas como explorar conceptos, conceptuar, aplicar lo aprendido y hacer asignaciones hubo diferencias estadisticamente significativas entre los candidatos y los maestros en servicio. Al comparar las frecuencias observadas con las esperadas hubo mas maestros en servicio y menos candidatos que indicaron usar el anterior banco de datos y las herramientas computadorizadas en las mencionadas actividades educativas.

  10. [Not Available].

    PubMed

    Díaz, Toni; Ficapal-Cusí, Pilar; Aguilar-Martínez, Alicia

    2016-01-01

    Introducción: a pesar de la relevancia nutricional del desayuno para el desarrollo y su asociación a un mejor aprendizaje y rendimiento escolar, numerosos estudios ponen en evidencia que en muchos casos se omite o se hace mal.Objetivo: determinar la calidad del desayuno de estudiantes de entre 10 y 16 años con intención de determinar en qué momento sería conveniente realizar programas educativos sobre la importancia de esta comida y cómo mejorar su calidad.Método: estudio observacional, descriptivo y transversal a partir de un cuestionario con preguntas cerradas acerca de los hábitos de alimentación en el desayuno en estudiantes de educación primaria y secundaria.Resultados y conclusión: solo el 18,5% de los estudiantes realiza un desayuno de buena calidad y su mala calidad va aumentando progresivamente con los cursos y se asocia al hecho de desayunar solo. En ambos niveles educativos los alimentos más consumidos en casa pertenecen al grupo de los lácteos y los cereales, mientras que en el centro escolar, el bocadillo resulta el desayuno más habitual; no obstante se observan diferencias entre primaria y secundaria en cuanto al consumo de fruta y bebidas azucaradas, entre otros.Conclusión: sería interesante valorar la instauración de programas de desayuno escolar incluyendo en ellos no solo a estudiantes de primaria, sino también, y especialmente, a adolescentes pues son estos quienes omiten esta comida en mayor proporción. Las intervenciones deberían orientarse a corregir las desviaciones más habituales observadas en cada uno de los niveles educativos. PMID:27571666

  11. Análise Temporal de Estruturas Morfológicas na Cauda do Tipo I do Cometa P/Halley

    NASA Astrophysics Data System (ADS)

    Voelzke, M. R.; Matsuura, O. T.

    1996-08-01

    Com base em (Brandt et al, 1992), centenas de imagens do cometa P/Halley foram visualmente analisadas, objetivando examinar possíveis perturbações magnetohidrodinâmicas ao longo da cauda do tipo I. Do total de 1439 imagens, abrangendo o período entre 16 de outubro de 1982 e 12 de fevereiro de 1991, foram escolhidas 531 do período entre 17 de setembro de 1985 e 06 de julho de 1986 por mostrarem cauda bem desenvolvida e rica de estruturas morfológicas. Nelas constatou-se a existência de 124 estruturas ondulatórias (trens de onda) ao longo da cauda principal, 27 ao longo de caudas secundárias, 109 ondas solitárias (sólitons) ao longo da cauda principal, 36 ao longo de caudas secundárias, 12 caudas do tipo Swan, 47 eventos de desconexão e 23 regiões de adensamento ("knots"). Foi examinada a correlação temporal entre esses diferentes tipos de eventos. Os de desconexão foram analisados isoladamente. Seus movimentos próprios foram calculados, bem como os seus instantes iniciais, o que nos permitiu inferir a passagem do cometa pela fronteira entre setores magnéticos distintos. A velocidade do plasma cometário desconectado foi corrigida dos efeitos de projeção e correlacionada com a distância heliocêntrica do cometa. Também foi investigada a periodicidade de ocorrência das desconexães, e constatado que sua distribuição é bimodal. Por fim, a possibilidade dos modos de propagação de ondas MHD "sausage" e "kink" superficiais ou volumétricas, é discutida no contexto das descontinuidades magnéticas tangenciais. - Brandt, J.C., Niedner Jr., M.B., Rahe, J.: The International Halley Watch Atlas of Large-Scale Phenomena. Impresso por: Johnson Printing Co, Boulder, CO. University of Colorado-Boulder, 1992.

  12. President of Council-Sir Alec

    ScienceCinema

    None

    2011-04-25

    En décembre 1983 le président de l'Association du Personnel du Cern a suggéré d'inviter le président du conseil à une réunion du personnel dans le but d'améliorer la communication entre le conseil et le personnel. Le DG H.schopper remercie le président du conseil, Sir Alec, d'avoir accepté l'invitation malgré ses nombreux occupations.

  13. Spirituality and Cultural Identification Among Latino and Non-Latino College Students.

    PubMed

    Campesino, Maureen; Belyea, Michael; Schwartz, Gary

    2009-01-01

    The purposes of this study were to examine (a) differences in spiritual perspectives and practices of Latino and non-Latino young adults and (b) the cultural relevance of the Latino Spiritual Perspective Scale (LSPS). Studies indicate that spiritual perspectives are embedded within cultural group norms and vary significantly across ethnic groups. A cross-sectional survey design was used with a convenience sample of 223 Latino and non-Latino university students in the Southwestern United States. The Spiritual Perspective Scale (SPS), the LSPS, the Orthogonal Cultural Identification Scale, and a demographic questionnaire were used. Latinos scored significantly higher than non-Latinos in both measures of spiritual perspectives. Self-reported behavioral measures, such as frequency of personal prayer, were also higher among the Latino group. Latino cultural identification was the only significant predictor of LSPS scores. Findings from this study indicate that spirituality among Latinos has meanings specific to the cultural group context. These findings have implications for nursing research involving the conceptualization and measurement of spirituality among multiethnic groups.Los propósitos de este estudio eran examinar: (a) diferencias en perspectivas espirituales y prácticas de jóvenes Latinos y no Latinos; y (b) la relevancia cultural de la Escala de la Perspectiva Espiritual Latina. Estudios indican que perspectivas espirituales están incrustadas entre normas culturales del grupo y varían considerablemente entre grupos étnicos. Un diseño transversal y de encuesta fue utilizado con una muestra de conveniencia de 233 estudiantes universitarios Latinos y no Latinos en el Suroeste de los Estados Unidos. La Escala de la Perspectiva Espiritual (EPE), la Escala de la Perspectiva Espiritual Latina (EPEL), la Escala Ortogonal de Identificación Cultural, y un cuestionario demográfico fueron utilizados. Los Latinos calificaron considerablemente más alto que los no

  14. Signature CERN-URSS

    ScienceCinema

    None

    2011-04-25

    Le DG W.Jentschke souhaite la bienvenue à l'assemblée et aux invités pour la signature du protocole entre le Cern et l'URSS qui est un événement important. C'est en 1955 que 55 visiteurs soviétiques ont visité le Cern pour la première fois. Le premier DG au Cern, F.Bloch, et Mons.Amaldi sont aussi présents. Tandis que le discours anglais de W.Jentschke est traduit en russe, le discours russe de Mons.Morozov est traduit en anglais.

  15. Le naevus bleu cellulaire atypique du poignet: à propos d'un cas et revue de la literature

    PubMed Central

    Boussakri, Hassan; Roux, Jean Luc; Durand, Luc; Elibrahimi, Abdelhalim; Elmrini, Abdelmajid

    2014-01-01

    Le naevus bleu cellulaire atypique est une entité pathologique rare et sa localisation au niveau du poignet est exceptionnelle. Il est Considéré comme une Variante à des caractéristiques intermédiaires entre le naevus bleu cellulaire typique et le naevus bleu malin, dont l’évolution est incertaine. Le but de notre travail est d'attirer l'attention sur cette variété lésionnelle rare et de discuter les diagnostiques différentiels, ainsi que décrire les aspects histologique et les options thérapeutiques possibles. PMID:25426206

  16. Spectroscopie Raman et Rayleigh stimulée des mélasses optiques unidimensionnelles (partie II)

    NASA Astrophysics Data System (ADS)

    Courtois, Jean-Yves

    Dans la première partie de cet article, nous nous sommes attachés à décrire dans le détail les caractéristiques générales des processus de diffusion Raman et Rayleigh stimulée se produisant dans les milieux atomiques et moléculaires traditionnels, de manière à bien faire ressortir les spécificités des propriétés optiques non linéaires des mélasses optiques, dont l'étude fait l'objet de cette seconde partie. L'origine de ces spécificités réside dans une particularité des atomes refroidis par laser, à savoir l'intime corrélation entre degrés de liberté internes et externes dans leur réponse non linéaire. Cette caractéristique est en fait inhérente au processus de ralentissement : d'une part la force exercée par les faisceaux lasers sur les atomes (pression de radiation et redistribution de photons) dépend fortement de l'état atomique interne, et d'autre part cet état est modifié de façon très sélective en position ou en vitesse par les ondes lasers de refroidissement (déplacements lumineux et pompage optique). Elle sous-tend toute la richesse et l'originalité du comportement non linéaire des mélasses optiques, mais aussi toute la complexité de leur modélisation théorique, qui requiert une description globale de l'évolution des degrés de liberté internes et externes des atomes sous l'action des champs lasers. Afin de mettre en évidence le lien entre ces corrélations et les propriétés non linéaires des atomes froids, nous concentrerons notre étude d'une part sur les mélasses linbot lin qui constituent un cas de couplage entre état interne et position des atomes localisés au fond des puits du potentiel associé aux déplacements lumineux (paragr. 4), et d'autre part sur les mélasses σ^+-σ- qui correspondent quant à elles à un couplage entre état interne et vitesse atomiques (paragr. 5).

  17. Un nuevo estudio del cúmulo abierto Tr 14 en la región de Carina

    NASA Astrophysics Data System (ADS)

    García, B.; Malaroda, S.; Levato, H.; Morrell, N.

    Presentamos nuevos datos espectroscópicos de 9 objetos entre los miembros más brillantes de Tr 14. Hemos medido un total de 80 nuevos espectrogramas para contribuir a la determinación de la real naturaleza de estos objetos desde el punto de vista de la duplicidad. Del nuevo material debemos concluir que la mayoría de las estrellas en la muestra son simples. Sin embargo existen algunos objetos cuyo seguimiento debe continuar ya que no nos es posible efectuar conclusiones definitivas con el presente material.

  18. ESMC

    ScienceCinema

    None

    2011-04-25

    Workshops de 2 jours au Cern: 1.partie: communication scientifique: plusieurs discours suivis de questions et intenses discussions: 1.François de Closet "le progrès scientifique" 2.Gerhard Moosleiter(?) exposé avec dias et questions 3.H.Meyers "comment créer de meilleures conditions en communication scientifique 2.partie: science et communication :présentation des dias et questions. Une Russe de Moscou parle entre autre de la situation actuelle de la presse scientifique en Russie 3.partie: conclusions et rapports de la veille de differents groupes de travail 4.partie:questions avec C.Rubbia et N.Calder et remerciements

  19. F.S.V.B. Volleyball

    ScienceCinema

    None

    2011-04-25

    22me assemblée des délégués de la Fédération Suisse de Volley Ball (F.S.V.B.), en présence entre autres de Claude Delay, représentant de la société fédérale de gymnastique et Hans Gauer, représentant de l'association suisse de gymnastique féminine. Annonce d'une démonstration d'un mini match de volley ball à Meyrin dans l'après-midi.

  20. Early error detection: an action-research experience teaching vector calculus

    NASA Astrophysics Data System (ADS)

    Magdalena Añino, María; Merino, Gabriela; Miyara, Alberto; Perassi, Marisol; Ravera, Emiliano; Pita, Gustavo; Waigandt, Diana

    2014-04-01

    This paper describes an action-research experience carried out with second year students at the School of Engineering of the National University of Entre Ríos, Argentina. Vector calculus students played an active role in their own learning process. They were required to present weekly reports, in both oral and written forms, on the topics studied, instead of merely sitting and watching as the teacher solved problems on the blackboard. The students were also asked to perform computer assignments, and their learning process was continuously monitored. Among many benefits, this methodology has allowed students and teachers to identify errors and misconceptions that might have gone unnoticed under a more passive approach.

  1. Etienne-François Geoffroy (1672-1731), a Chemist on the Frontiers.

    PubMed

    Joly, Bernard

    2014-01-01

    Etienne-François Geoffroy is certainly the most representative chemist of the Paris Académie Royale des Sciences in the early eighteenth century. Interested in Newtonian ideas, he did not reject Cartesian mechanism. He is the inventor of the "Table des rapports entre les substances chimiques," which remained in use throughout the eighteenth century, but he drew from the alchemical tradition. He readily theorized about the composition of metals or the laws of chemical affinities, but he practiced a chemistry that was rooted in laboratory work and the search for substances useful to craftsmen. PMID:26103751

  2. Spirituality and Cultural Identification Among Latino and Non-Latino College Students

    PubMed Central

    Campesino, Maureen; Belyea, Michael; Schwartz, Gary

    2010-01-01

    The purposes of this study were to examine (a) differences in spiritual perspectives and practices of Latino and non-Latino young adults and (b) the cultural relevance of the Latino Spiritual Perspective Scale (LSPS). Studies indicate that spiritual perspectives are embedded within cultural group norms and vary significantly across ethnic groups. A cross-sectional survey design was used with a convenience sample of 223 Latino and non-Latino university students in the Southwestern United States. The Spiritual Perspective Scale (SPS), the LSPS, the Orthogonal Cultural Identification Scale, and a demographic questionnaire were used. Latinos scored significantly higher than non-Latinos in both measures of spiritual perspectives. Self-reported behavioral measures, such as frequency of personal prayer, were also higher among the Latino group. Latino cultural identification was the only significant predictor of LSPS scores. Findings from this study indicate that spirituality among Latinos has meanings specific to the cultural group context. These findings have implications for nursing research involving the conceptualization and measurement of spirituality among multiethnic groups. Los propósitos de este estudio eran examinar: (a) diferencias en perspectivas espirituales y prácticas de jóvenes Latinos y no Latinos; y (b) la relevancia cultural de la Escala de la Perspectiva Espiritual Latina. Estudios indican que perspectivas espirituales están incrustadas entre normas culturales del grupo y varían considerablemente entre grupos étnicos. Un diseño transversal y de encuesta fue utilizado con una muestra de conveniencia de 233 estudiantes universitarios Latinos y no Latinos en el Suroeste de los Estados Unidos. La Escala de la Perspectiva Espiritual (EPE), la Escala de la Perspectiva Espiritual Latina (EPEL), la Escala Ortogonal de Identificación Cultural, y un cuestionario demográfico fueron utilizados. Los Latinos calificaron considerablemente más alto que los

  3. [Not Available].

    PubMed

    De Arriba Muñoz, Antonio; López Úbeda, Marta; Rueda Caballero, Carmen; Labarta Aizpún, José Ignacio; Ferrández Longás, Ángel

    2016-01-01

    Introducción: saber diagnosticar y tratar la obesidad se ha convertido en el mayor reto del siglo XXI, debido al aumento de su prevalencia.Objetivos: determinar los valores de normalidad de perímetro abdominal (PA) e índice de masa corporal (IMC) según edad y sexo en población española sana.Métodos: estudio longitudinal observacional realizado entre 1980 y 2014. Se incluyeron 165 niños y 169 niñas recién nacidas, recogiendo datos de forma anual hasta los 18 años (74 varones y 92 mujeres), y posteriormente a los 28 años (42 varones y 45 mujeres). Se realizó medición de peso, longitud/talla y perímetro abdominal. Se calcularon los percentiles (P3, P10, P25, P50, P75, P90, P97) de IMC y PA según edad y sexo.Resultados: se presentan datos evolutivos de IMC y PA durante la infancia, destacando cómo aumentan los valores entre los 18 y 28 años de los percentiles superiores al p50, sobre todo en mujeres. Existe una correlación positiva en relación al PA entre el valor obtenido a los 3 años con el valor de los 18 años y de los 28 años tanto en varones (r = 0,722 y r = 0,605, p = 0,000, respectivamente) como en mujeres(r = 0,922, r = 0,857, p = 0,000, respectivamente). Y entre los 18 y 28 años (r = 0,731, p = 0,000 para varones y r = 0,961, p = 0,000 para mujeres).Conclusión: se presentan valores de normalidad de PA e IMC según edad y sexo, que podrán utilizarse como herramienta de referencia para identificar a personas con riesgo de desarrollar enfermedades cardiovasculares o diabetes. PMID:27571663

  4. Brief Communication: On the rapid and efficient monitoring results dissemination in landslide emergency scenarios: the Mont de La Saxe case study

    NASA Astrophysics Data System (ADS)

    Giordan, D.; Manconi, A.; Allasia, P.; Bertolo, D.

    2015-04-01

    Straightforward communication of monitoring results is of major importance in emergency scenarios relevant to large slope instabilities. Here we describe the communication strategy developed for the Mont de La Saxe case study, a large rockslide threatening La Palud and Entrèves hamlets in the Courmayeur municipality (Aosta Valley, Italy). Starting from the definition of actions and needs of the Landslide Management Team, including scientists, technicians, civil protection operators, decision makers, and politicians, we show that sharing and disseminating ad hoc information simplifies the understanding of the landslide evolution, as well as the correct communication of the level of criticality.

  5. Brief Communication: On the rapid and efficient monitoring results dissemination in landslide emergency scenarios: the Mont de La Saxe case study

    NASA Astrophysics Data System (ADS)

    Giordan, D.; Manconi, A.; Allasia, P.; Bertolo, D.

    2015-09-01

    Straightforward communication of monitoring results is of major importance in emergency scenarios relevant to large slope instabilities. Here we describe the communication strategy developed for the Mont de La Saxe rockslide threatening La Palud and Entrèves hamlets in the Courmayeur municipality (Aosta Valley, Italy). Starting from the definition of actions and needs of the landslide management team, including scientists, technicians, civil protection operators, decision makers, and politicians, we show that sharing and disseminating ad hoc information simplifies the understanding of the landslide evolution, as well as the correct communication of the level of criticality.

  6. [In Process Citation].

    PubMed

    Daponte Codina, A; Bolivar Muñoz, J; Sánchez-Cantalejo, E; Mateo-Rodríguez, I; Babio, G; Romo-Avilés, N; Rosell-Ortiz, F; Grupo de Estudio de Género Y Enfermedades Cardiovasculares, G

    2016-01-01

     RESUMEN              Fundamento. Identificar factores asociados a la demora prehospitalaria en personas que han tenido un síndrome coronario agudo             Método. Se estudiaron mediante encuesta pacientes ingresados por síndrome coronario agudo en los 33 hospitales públicos andaluces, obteniéndose información sobre diferentes tipos de variables: socio-demográficas, contextuales, clínicas, percepción, actuaciones, y transporte. Se aplicaron modelos de regresión logística multivariante para calcular las odds ratio para la demora.             Resultados. De los 1.416 pacientes en total, más de la mitad tuvieron una demora superior a la hora. Se asocia a la distancia al hospital y al medio de transporte: cuando el evento ocurre en la misma ciudad del hospital, utilizar medios propios aumenta la demora, odds ratio= 1,51 (1,02-2,23);  si la distancia es entre 1-25 kilómetros, no hay una diferencia entre medios propios y ambulancia, odds ratio = 1,41 y odds ratio = 1,43 respectivamente; y cuando supera los25 kilómetros la ambulancia implica mayor demora, odds ratio = 3,13 y odds ratio = 2,20 respectivamente. Además, la sintomatología típica reduce la demora entre los hombres, pero la aumenta entre las mujeres. Asimismo, no darle importancia, esperar a la resolución de los síntomas, buscar atención sanitaria diferente a urgencias hospitalarias o al 061, tener antecedentes, encontrarse fuera de la vivienda habitual, y tener ingresos menores de 1.500 euros aumentan la demora. Tener síntomas respiratorios la reduce.             Conclusiones. La demora prehospitalaria no se ajusta a las recomendaciones sanitarias, asociándose al  entorno físico y social, a factores clínicos, y de percepción y actitudinales de los sujetos.              Palabras clave. Síndrome coronario agudo. Demora prehospitalaria. Género. Servicios de emergencias sanitarias. Desigualdades. PMID:27125609

  7. F.S.V.B. Volleyball

    SciTech Connect

    2006-06-07

    22me assemblée des délégués de la Fédération Suisse de Volley Ball (F.S.V.B.), en présence entre autres de Claude Delay, représentant de la société fédérale de gymnastique et Hans Gauer, représentant de l'association suisse de gymnastique féminine. Annonce d'une démonstration d'un mini match de volley ball à Meyrin dans l'après-midi.

  8. TUBERCULOSIS COMO ENFERMEDAD OCUPACIONAL

    PubMed Central

    Mendoza-Ticona, Alberto

    2014-01-01

    Existe evidencia suficiente para declarar a la tuberculosis como enfermedad ocupacional en diversos profesionales especialmente entre los trabajadores de salud. En el Perú están normados y reglamentados los derechos laborales inherentes a la tuberculosis como enfermedad ocupacional, como la cobertura por discapacidad temporal o permanente. Sin embargo, estos derechos aún no han sido suficientemente socializados. En este trabajo se presenta información sobre el riesgo de adquirir tuberculosis en el lugar de trabajo, se revisan las evidencias para declarar a la tuberculosis como enfermedad ocupacional en trabajadores de salud y se presenta la legislación peruana vigente al respecto. PMID:22858771

  9. ESMC

    SciTech Connect

    2007-10-31

    Workshops de 2 jours au Cern: 1.partie: communication scientifique: plusieurs discours suivis de questions et intenses discussions: 1.François de Closet "le progrès scientifique" 2.Gerhard Moosleiter(?) exposé avec dias et questions 3.H.Meyers "comment créer de meilleures conditions en communication scientifique 2.partie: science et communication :présentation des dias et questions. Une Russe de Moscou parle entre autre de la situation actuelle de la presse scientifique en Russie 3.partie: conclusions et rapports de la veille de differents groupes de travail 4.partie:questions avec C.Rubbia et N.Calder et remerciements

  10. Measuring the complex moduli of materials by using the double pendulum system

    NASA Astrophysics Data System (ADS)

    Casimir, J. B.; Vinh, T.

    2012-03-01

    A interesting double pendulum system permits evaluating complex moduli (Young and shear) without independent excitation and transducers. This instrument was described at France in 1934 by Le Rolland and Sorin in Etude d' une méthode utilisant le couplage entre deux systèmes oscillants pour la détermination de la résistance mécanique des constructions et la mesure des modules d' élasticité, scientific and technical publications of the Air Force Ministry, no. 47, 1934. This device is revisited and improved in order to make it applicable to measurements of viscoelastic materials.