The Experts below are selected from a list of 802020 Experts worldwide ranked by ideXlab platform
Torsten B Neilands - One of the best experts on this subject based on the ideXlab platform.
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a structural Environmental Model of alcohol and substance related sexual hiv risk in latino migrant day laborers
Aids and Behavior, 2020Co-Authors: Kurt C Organista, Woojin Jung, Torsten B NeilandsAbstract:A structural-Environmental Model of alcohol and substance-related sexual HIV risk in 344 Latino migrant day laborers, participants in a cross-sectional survey, is tested using structural equation Modeling. Hypothesized pathways include: (1) direct paths between Environmental conditions and both distress related risk factors, and cultural and community protective factors; (2) indirect paths between Environmental conditions and distress through cultural and community protective factors; and (3) indirect paths between Environmental conditions and sexual risk through both distress risk factors and cultural and community protective factors. As hypothesized, the Environmental factors, discrimination and working conditions, were indirectly related to sexual risk through the distress related factor, problem drinking, and through the protective factor, contact with family in country of origin. More specifically, as discrimination and working conditions worsen, contact with family decreases, problem drinking increases, and sexual risk increases. Implications for multi-level interventions are discussed.
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A Structural-Environmental Model of Alcohol and Substance-Related Sexual HIV Risk in Latino Migrant Day Laborers
AIDS and Behavior, 2020Co-Authors: Kurt C Organista, Woojin Jung, Torsten B NeilandsAbstract:A structural-Environmental Model of alcohol and substance-related sexual HIV risk in 344 Latino migrant day laborers, participants in a cross-sectional survey, is tested using structural equation Modeling. Hypothesized pathways include: (1) direct paths between Environmental conditions and both distress related risk factors, and cultural and community protective factors; (2) indirect paths between Environmental conditions and distress through cultural and community protective factors; and (3) indirect paths between Environmental conditions and sexual risk through both distress risk factors and cultural and community protective factors. As hypothesized, the Environmental factors, discrimination and working conditions, were indirectly related to sexual risk through the distress related factor, problem drinking, and through the protective factor, contact with family in country of origin. More specifically, as discrimination and working conditions worsen, contact with family decreases, problem drinking increases, and sexual risk increases. Implications for multi-level interventions are discussed. Un Modelo estructural-ambiental de riesgo de VIH sexual relacionado con el alcohol y las sustancias en 344 jornaleros migrantes latinos, participantes en una encuesta transversal, se prueba usando Modelos de ecuaciones estructurales. Las rutas hipotéticas incluyen: (1) rutas directas entre las condiciones ambientales y los factores de riesgo relacionados con la angustia y los factores de protección culturales y comunitarios; (2) rutas indirectas entre las condiciones ambientales y la angustia a través de factores protectores culturales y comunitarios; y (3) rutas indirectas entre las condiciones ambientales y el riesgo sexual a través de factores de riesgo de angustia y factores de protección culturales y comunitarios. Según la hipótesis, los factores ambientales, la discriminación y las condiciones de trabajo, estaban indirectamente relacionados con el riesgo sexual a través del factor relacionado con la angustia, el problema con el alcohol y, a través del factor de protección, el contacto con la familia en el país de origen. Más específicamente, a medida que empeoran la discriminación y las condiciones de trabajo, disminuye el contacto con la familia, aumenta el problema con la bebida y aumenta el riesgo sexual. Se discuten las implicaciones para intervenciones de múltiples niveles.
Kurt C Organista - One of the best experts on this subject based on the ideXlab platform.
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a structural Environmental Model of alcohol and substance related sexual hiv risk in latino migrant day laborers
Aids and Behavior, 2020Co-Authors: Kurt C Organista, Woojin Jung, Torsten B NeilandsAbstract:A structural-Environmental Model of alcohol and substance-related sexual HIV risk in 344 Latino migrant day laborers, participants in a cross-sectional survey, is tested using structural equation Modeling. Hypothesized pathways include: (1) direct paths between Environmental conditions and both distress related risk factors, and cultural and community protective factors; (2) indirect paths between Environmental conditions and distress through cultural and community protective factors; and (3) indirect paths between Environmental conditions and sexual risk through both distress risk factors and cultural and community protective factors. As hypothesized, the Environmental factors, discrimination and working conditions, were indirectly related to sexual risk through the distress related factor, problem drinking, and through the protective factor, contact with family in country of origin. More specifically, as discrimination and working conditions worsen, contact with family decreases, problem drinking increases, and sexual risk increases. Implications for multi-level interventions are discussed.
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A Structural-Environmental Model of Alcohol and Substance-Related Sexual HIV Risk in Latino Migrant Day Laborers
AIDS and Behavior, 2020Co-Authors: Kurt C Organista, Woojin Jung, Torsten B NeilandsAbstract:A structural-Environmental Model of alcohol and substance-related sexual HIV risk in 344 Latino migrant day laborers, participants in a cross-sectional survey, is tested using structural equation Modeling. Hypothesized pathways include: (1) direct paths between Environmental conditions and both distress related risk factors, and cultural and community protective factors; (2) indirect paths between Environmental conditions and distress through cultural and community protective factors; and (3) indirect paths between Environmental conditions and sexual risk through both distress risk factors and cultural and community protective factors. As hypothesized, the Environmental factors, discrimination and working conditions, were indirectly related to sexual risk through the distress related factor, problem drinking, and through the protective factor, contact with family in country of origin. More specifically, as discrimination and working conditions worsen, contact with family decreases, problem drinking increases, and sexual risk increases. Implications for multi-level interventions are discussed. Un Modelo estructural-ambiental de riesgo de VIH sexual relacionado con el alcohol y las sustancias en 344 jornaleros migrantes latinos, participantes en una encuesta transversal, se prueba usando Modelos de ecuaciones estructurales. Las rutas hipotéticas incluyen: (1) rutas directas entre las condiciones ambientales y los factores de riesgo relacionados con la angustia y los factores de protección culturales y comunitarios; (2) rutas indirectas entre las condiciones ambientales y la angustia a través de factores protectores culturales y comunitarios; y (3) rutas indirectas entre las condiciones ambientales y el riesgo sexual a través de factores de riesgo de angustia y factores de protección culturales y comunitarios. Según la hipótesis, los factores ambientales, la discriminación y las condiciones de trabajo, estaban indirectamente relacionados con el riesgo sexual a través del factor relacionado con la angustia, el problema con el alcohol y, a través del factor de protección, el contacto con la familia en el país de origen. Más específicamente, a medida que empeoran la discriminación y las condiciones de trabajo, disminuye el contacto con la familia, aumenta el problema con la bebida y aumenta el riesgo sexual. Se discuten las implicaciones para intervenciones de múltiples niveles.
Woojin Jung - One of the best experts on this subject based on the ideXlab platform.
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a structural Environmental Model of alcohol and substance related sexual hiv risk in latino migrant day laborers
Aids and Behavior, 2020Co-Authors: Kurt C Organista, Woojin Jung, Torsten B NeilandsAbstract:A structural-Environmental Model of alcohol and substance-related sexual HIV risk in 344 Latino migrant day laborers, participants in a cross-sectional survey, is tested using structural equation Modeling. Hypothesized pathways include: (1) direct paths between Environmental conditions and both distress related risk factors, and cultural and community protective factors; (2) indirect paths between Environmental conditions and distress through cultural and community protective factors; and (3) indirect paths between Environmental conditions and sexual risk through both distress risk factors and cultural and community protective factors. As hypothesized, the Environmental factors, discrimination and working conditions, were indirectly related to sexual risk through the distress related factor, problem drinking, and through the protective factor, contact with family in country of origin. More specifically, as discrimination and working conditions worsen, contact with family decreases, problem drinking increases, and sexual risk increases. Implications for multi-level interventions are discussed.
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A Structural-Environmental Model of Alcohol and Substance-Related Sexual HIV Risk in Latino Migrant Day Laborers
AIDS and Behavior, 2020Co-Authors: Kurt C Organista, Woojin Jung, Torsten B NeilandsAbstract:A structural-Environmental Model of alcohol and substance-related sexual HIV risk in 344 Latino migrant day laborers, participants in a cross-sectional survey, is tested using structural equation Modeling. Hypothesized pathways include: (1) direct paths between Environmental conditions and both distress related risk factors, and cultural and community protective factors; (2) indirect paths between Environmental conditions and distress through cultural and community protective factors; and (3) indirect paths between Environmental conditions and sexual risk through both distress risk factors and cultural and community protective factors. As hypothesized, the Environmental factors, discrimination and working conditions, were indirectly related to sexual risk through the distress related factor, problem drinking, and through the protective factor, contact with family in country of origin. More specifically, as discrimination and working conditions worsen, contact with family decreases, problem drinking increases, and sexual risk increases. Implications for multi-level interventions are discussed. Un Modelo estructural-ambiental de riesgo de VIH sexual relacionado con el alcohol y las sustancias en 344 jornaleros migrantes latinos, participantes en una encuesta transversal, se prueba usando Modelos de ecuaciones estructurales. Las rutas hipotéticas incluyen: (1) rutas directas entre las condiciones ambientales y los factores de riesgo relacionados con la angustia y los factores de protección culturales y comunitarios; (2) rutas indirectas entre las condiciones ambientales y la angustia a través de factores protectores culturales y comunitarios; y (3) rutas indirectas entre las condiciones ambientales y el riesgo sexual a través de factores de riesgo de angustia y factores de protección culturales y comunitarios. Según la hipótesis, los factores ambientales, la discriminación y las condiciones de trabajo, estaban indirectamente relacionados con el riesgo sexual a través del factor relacionado con la angustia, el problema con el alcohol y, a través del factor de protección, el contacto con la familia en el país de origen. Más específicamente, a medida que empeoran la discriminación y las condiciones de trabajo, disminuye el contacto con la familia, aumenta el problema con la bebida y aumenta el riesgo sexual. Se discuten las implicaciones para intervenciones de múltiples niveles.
Willy Bauwens - One of the best experts on this subject based on the ideXlab platform.
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sobol sensitivity analysis of a complex Environmental Model
Environmental Modelling and Software, 2011Co-Authors: Jiri Nossent, Pieter Elsen, Willy BauwensAbstract:Complex Environmental Models are controlled by a high number of parameters. Accurately estimating the values of all these parameters is almost impossible. Sensitivity analysis (SA) results enable the selection of the parameters to include in a calibration procedure, but can also assist in the identification of the Model processes. Additionally, a sensitivity analysis can yield crucial information on the use and meaning of the Model parameters. This paper presents a Sobol' sensitivity analysis for flow simulations by a SWAT Model of the river Kleine Nete, with the objective to assess the first order, second order and total sensitivity effects. Confidence intervals for the resulting sensitivity indices are inferred by applying bootstrapping. The results indicate that the curve number value (CN2) is the most important parameter of the Model and that no more than 9 parameters (out of 26) are needed to have an adequate representation of the Model variability. The convergence of the parameter ranking for total sensitivity effects is relatively fast, which is promising for factor fixing purposes. It is also shown that the Sobol' sensitivity analysis enhances the understanding of the Model, by e.g. pointing out 3 significant pairwise interactions. In general, it can be concluded that the Sobol' sensitivity analysis can be successfully applied for factor fixing and factor prioritization with respect to the input parameters of a SWAT Model, even with a limited number of Model evaluations. The analysis also supports the identification of Model processes, parameter values and parameter interaction effects.
Marie-estelle Demory - One of the best experts on this subject based on the ideXlab platform.
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investigating global tropical cyclone activity with a hierarchy of agcms the role of Model resolution
Journal of Climate, 2013Co-Authors: Jane Strachan, Malcolm J. Roberts, Pier Luigi Vidale, Kevin I Hodges, Marie-estelle DemoryAbstract:AbstractThe ability to run general circulation Models (GCMs) at ever-higher horizontal resolutions has meant that tropical cyclone simulations are increasingly credible. A hierarchy of atmosphere-only GCMs, based on the Hadley Centre Global Environmental Model version 1 (HadGEM1) with horizontal resolution increasing from approximately 270 to 60 km at 50°N, is used to systematically investigate the impact of spatial resolution on the simulation of global tropical cyclone activity, independent of Model formulation. Tropical cyclones are extracted from ensemble simulations and reanalyses of comparable resolutions using a feature-tracking algorithm. Resolution is critical for simulating storm intensity and convergence to observed storm intensities is not achieved with the Model hierarchy. Resolution is less critical for simulating the annual number of tropical cyclones and their geographical distribution, which are well captured at resolutions of 135 km or higher, particularly for Northern Hemisphere basins....
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u k higem the new u k high resolution global environment Model Model description and basic evaluation
Journal of Climate, 2009Co-Authors: Leonard Christopher Shaffrey, I Stevens, Warwick A Norton, A Jrrar, David P Stevens, Margaret J Woodage, Jamie Harle, Malcolm J. Roberts, Pier Luigi Vidale, Marie-estelle DemoryAbstract:Abstract This article describes the development and evaluation of the U.K.’s new High-Resolution Global Environmental Model (HiGEM), which is based on the latest climate configuration of the Met Office Unified Model, known as the Hadley Centre Global Environmental Model, version 1 (HadGEM1). In HiGEM, the horizontal resolution has been increased to 0.83° latitude × 1.25° longitude for the atmosphere, and 1/3° × 1/3° globally for the ocean. Multidecadal integrations of HiGEM, and the lower-resolution HadGEM, are used to explore the impact of resolution on the fidelity of climate simulations. Generally, SST errors are reduced in HiGEM. Cold SST errors associated with the path of the North Atlantic drift improve, and warm SST errors are reduced in upwelling stratocumulus regions where the simulation of low-level cloud is better at higher resolution. The ocean Model in HiGEM allows ocean eddies to be partially resolved, which dramatically improves the representation of sea surface height variability. In the S...