RESUMO
RESUMEN Con el objetivo de contribuir en el control de accidentes de trabajo, esta investigación busca analizar si el estudio de los errores humanos en investigaciones de accidentes contribuye en las acciones para el control y reducción de accidentes de trabajo en una planta de sacrificios. El método de análisis utilizado fue la evaluación de los tipos de erro res humanos a través de una secuencia de preguntas donde hay siempre dos opciones de respuestas -sí o no- y conforme el trazado de las respuestas se crea un algoritmo que permite la detección del error. Los mayores porcentajes de errores fueron evidenciados en dos gru pos, órdenes de los supervisores y procedimientos inadecuados. Al contrario al resultado encontrado en el estudio, las acciones de segu ridad del trabajo están enfocadas en condiciones que no contribuyen en la prevención y control de los riesgos. Se puede concluir que la herramienta de análisis de riesgos utilizada por la empresa, además de despreciar el análisis de los errores huma nos, no soluciona de forma adecuada las causas ni las acciones levantadas en la investigación del accidente.
ABSTRACT In order to contribute to the control of industrial accidents this research seeks to analyze the study of human error in accident inves tigations contributes in actions for the control and reduction of accidents in a poultry slaughterhouse. The method of analysis was used to assess the types of human errors through a series of questions in which there are always two choices of answers, with a yes or no and as the way of answers creates an algorithm for error detection. The largest percentages of errors were found in two groups, the supervisor order and inadequate procedures. Contrary to the results found in the study, the work safety actions are focused on conditions that do not contribute to the prevention and control of risks. It can be concluded that the risk analysis tool used by the company in addition to neglecting the analysis of human error, does not address properly the causes and actions raised in the investigation of the accident.
Assuntos
Humanos , Masculino , Feminino , Riscos Ocupacionais , Acidentes de Trabalho/prevenção & controle , Matadouros , Brasil , Acidentes de Trabalho/estatística & dados numéricos , Estudos Transversais , Inquéritos e QuestionáriosRESUMO
Ipomoea purpurea (common morning glory) is an annual vine native to Mexico that is well known for its large, showy flowers. Humans have spread morning glories worldwide, owing to the horticultural appeal of morning glory flowers. Ipomoea purpurea is an opportunistic colonizer of disturbed habitats including roadside and agricultural settings, and it is now regarded as a noxious weed in the Southeastern US. Naturalized populations in the Southeastern United States are highly polymorphic for a number of flower color morphs, unlike native Mexican populations that are typically monomorphic for the purple color morph. Although I. purpurea was introduced into the United States from Mexico, little is known about the specific geographic origins of US populations relative to the Mexican source. We use resequencing data from 11 loci and 30 I. purpurea accessions collected from the native range of the species in Central and Southern Mexico and 8 accessions from the Southeastern United States to infer likely geographic origins in Mexico. Based on genetic assignment analysis, haplotype composition, and the degree of shared polymorphism, I. purpurea samples from the Southeastern United States are genetically most similar to samples from the Valley of Mexico and Veracruz State. This supports earlier speculation that I. purpurea in the Southeastern United States was likely to have been introduced by European colonists from sources in Central Mexico.
Assuntos
Flores/genética , Ipomoea/genética , Pigmentação/genética , Sequência de Bases , Sequência Consenso/genética , DNA de Plantas/genética , Variação Genética , Haplótipos , México , Filogeografia , Polimorfismo Genético , Alinhamento de Sequência , Análise de Sequência de DNA , Estados UnidosRESUMO
The common morning glory (Ipomoea purpurea) is an annual vine native to Central and Southern Mexico. The genetics of flower color polymorphisms and interactions with the biotic environment have been extensively studied in I. purpurea and in its sister species I. nil. In this study, we examine nucleotide sequence polymorphism in 11 loci, 9 of which are known to participate in a pathway that produces floral pigments. A sample of 30 I. purpurea accessions from the native range of Central and Southern Mexico comprise the data, along with one accession from each of the two sister species I. alba and I. nil. We observe moderate levels of nucleotide sequence polymorphism of ~1%. The ratio of recombination to mutation parameter estimates (ρ/θ) of ~2.5 appears consistent with a mixed-mating system. Ipomoea resequencing data from these genic regions are noteworthy in providing a good fit to the standard neutral model of molecular evolution. The derived silent site frequency spectrum is very close to that predicted by coalescent simulations of a drift-mutation process, and Tajima's D values are not significantly different from expectations under neutrality.