2 resultados para United States Military Academy
em Universidad del Rosario, Colombia
Resumo:
El objetivo de esta monografía es analizar el proceso de descentralización de Al Qaeda a causa del debilitamiento de su centro en Afganistán por la intervención militar de la coalición occidental. Se estudia como Al Qaeda deja de ser una organización jerárquica, comenzando a organizarse en red. Estas trasformaciones se pueden explicar a la luz de los principales postulados de la teoría de Guerra en Red, que incluyen la falta de un liderazgo central, y la distribución en enjambre para atacar. Siguiendo la línea argumentativa, finalmente se demuestra que mediante la expansión de la red, Al Qaeda aún bajo su situación de debilidad ha mantenido vigente la yihad trasnacional a través de las organizaciones filiales en África.
Vignettes and self-reported work disability in the United States: Correction of report heterogeneity
Resumo:
Subjective measures of health tend to suffer from bias given by reporting heterogeneity. however, some methodologies are used to correct the bias in order to compare self-assessed health for respondents with different sociodemographic characteristics. One of the methods to correct this is the hierarchical ordered probit (hopit), which includes rates of vignettes -hypothetical individuals with a fixed health state- and where two assumptions have to be fulfilled, vignette equivalence and response consistency. this methodology is used for the self-reported work disability for a sample of the united states for 2011. The results show that even though sociodemographic variables influence rating scales, adjusting for this does not change their effect on work disability, which is only influenced by income. the inclusion of variables related with ethnicity or place of birth does not influence the true work disability. however, when only one of them is excluded, it becomes significant and affects the true level of work disability as well as income.