Controle Da Vida Remanescente Em Equipamentos Industriais Que Operam Em Condições De Fluência

Abstract

Resumo A extinção da vida útil de um equipamento que opera em altas temperaturas pode estar associada a algum evento dependente do comportamento de seu material em fluência. O controle da vida residual do equipamento que apresenta certo nível de deformação acumulada é de interesse para orientar decisões de manutenção. Esta avaliação pode ser feita por diferentes caminhos: (a) a partir da história termomecânica a que o material é exposto em serviço; (b) através de ensaios físicos; (c) por observação de estrutura. Neste trabalho são apresentados os mecanismos controladores da deformação e da fratura por fluência. Alguns métodos de previsão de vida residual são analisados, apontando-se as limitações de cada um. Palavras-chave: Fluência; Vida útil; Deformação; Fratura.

Malaria in a vulnerable population living in quilombo remnant communities in the Brazilian Amazon: a cross-sectional study from 2005-2020

“…Other quilombo remnant communities are in the process of certification, indicating that the number of individuals living in quilombo remnant communities is projected to increase over the next few years. Despite quilombo populations being recognized for their value in the cultural formation of Brazil, they are still in a highly vulnerable situation, with little attention given to their needs as citizens, including basic healthcare 8,12,13,20 .…”

“…In general, previous studies have focused on social, economic, and other health aspects of this population 12,13,20 . Few investigations have shown data on infectious and parasitic diseases in quilombo communities, namely the prevalence of human T-lymphotropic virus (HTLV) infection 22 , the seroprevalence of rodent-borne viruses 23 , the molecular characterization of noroviruses from quilombola children 24 , and the occurrence of intestinal parasites 25,26 .…”

“…Anthropology defines them as organizational types founded by many slaves living in forests and organized in independent communities, each presenting characteristics for federal recognition, definition, and registration of their lands 11 . The subsistence strategies of these populations stemmed mainly from agricultural and extractive activities, in which high rates of human-mosquito contact occur 12,13 . Therefore, residents of these areas are highly exposed to the risk of malaria infection, a public health issue that has long affected human populations living in the Amazon region 5,7,14 .…”