2,458 research outputs found

    Magnetometry with nitrogen-vacancy ensembles in diamond based on infrared absorption in a doubly resonant optical cavity

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    We propose to use an optical cavity to enhance the sensitivity of magnetometers relying on the detection of the spin state of high-density nitrogen-vacancy ensembles in diamond using infrared optical absorption. The role of the cavity is to obtain a contrast in the absorption-detected magnetic resonance approaching unity at room temperature. We project an increase in the photon shot-noise limited sensitivity of two orders of magnitude in comparison with a single-pass approach. Optical losses can limit the enhancement to one order of magnitude which could still enable room temperature operation. Finally, the optical cavity also allows to use smaller pumping power when it is designed to be resonant at both the pump and the signal wavelength

    Projeto de aplicativo de troca de roupas usadas - internet e novas formas de trocar valor

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    PCC(graduação) - Universidade Federal de Santa Catarina. Centro de Comunicação e Expressão. Design.O presente trabalho propõe e projeta um aplicativo para smartphones, faz um estudo sobre o habito de compra, venda e troca de peças de roupa de segunda mão, a tendência e demanda é confirmada através de pesquisa online e entrevistas qualitativas presenciais, a seguir são analisados ambientes virtuais já existentes que possuem propostas similares. A partir dos dados coletados são levados em consideração princípios de usabilidade e são construídos wireframes. Por fim é desenvolvida uma identidade visual simples e interface final do aplicativo

    Respiratory health effects of fifteen years of improved collective protection in a wheat-processing worker population.

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    INTRODUCTION: Occupational exposure to grain dust causes respiratory symptoms and pathologies. To decrease these effects, major changes have occurred in the grain processing industry in the last twenty years. However, there are no data on the effects of these changes on workers' respiratory health. OBJECTIVES: The aim of this study was to evaluate the respiratory health of grain workers and farmers involved in different steps of the processing industry of wheat, the most frequently used cereal in Europe, fifteen years after major improvements in collective protective equipment due to mechanisation. MATERIALS AND METHOD: Information on estimated personal exposure to wheat dust was collected from 87 workers exposed to wheat dust and from 62 controls. Lung function (FEV1, FVC, and PEF), exhaled nitrogen monoxide (FENO) and respiratory symptoms were assessed after the period of highest exposure to wheat during the year. Linear regression models were used to explore the associations between exposure indices and respiratory effects. RESULTS: Acute symptoms - cough, sneezing, runny nose, scratchy throat - were significantly more frequent in exposed workers than in controls. Increased mean exposure level, increased cumulative exposure and chronic exposure to more than 6 mg.m (-3) of inhaled wheat dust were significantly associated with decreased spirometric parameters, including FEV1 and PEF (40 ml and 123 ml.s (-1) ), FEV1 and FVC (0.4 ml and 0.5 ml per 100 h.mg.m (-3) ), FEV1 and FVC (20 ml and 20 ml per 100 h at >6 mg.m (-3) ). However, no increase in FENO was associated with increased exposure indices. CONCLUSIONS: The lung functions of wheat-related workers are still affected by their cumulative exposure to wheat dust, despite improvements in the use of collective protective equipment

    Notificação de COVID-19 relacionada ao trabalho: estudo descritivo sobre o perfil sociodemográfico e ocupacional, Brasil, 2020

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    TCC(graduação) - Universidade Federal de Santa Catarina. Centro de Ciências da Saúde. Medicina.Objetivo: realizar uma análise descritiva dos casos notificados de COVID-19 relacionados ao trabalho no Brasil, em 2020. Método: estudo descritivo com dados coletados do Sistema de Informação de Agravos de Notificação (SINAN). As variáveis do estudo foram sexo, raça, escolaridade, região do Brasil, faixa etária, Comunicação de Acidente no Trabalho (CAT), evolução e ocupação. Os dados foram organizados e analisados utilizando o software Stata® 14.0. Resultados: foram notificados 30.802 casos, com predominância de mulheres (67,3%) e pessoas negras (48%). Os trabalhadores/profissionais da saúde foram o grupo ocupacional mais afetado (57,5%), porém também foram analisadas outras ocupações não relacionadas a saúde. Observou-se alta frequência de casos em que não houve preenchimento das variáveis raça (16,1%) e escolaridade (27,3%). Além disso, notou-se que apenas 16,1% dos trabalhadores tiveram sua CAT emitida. Discussão: os resultados sugerem disparidades sociodemográficas e ocupacionais nas infecções pelo COVID-19, reforçando uma maior necessidade de atenção por parte dos órgãos governamentais para políticas públicas que garantem maior proteção à saúde dos trabalhadores. Além de destacar uma baixa qualidade no preenchimento das notificações de casos de COVID-19 relacionados ao trabalho.Objective: to perform a descriptive analysis of reported work-related COVID-19 cases in Brazil in 2020. Methods: Descriptive study with data collected from the Information System for Notifiable Diseases (SINAN). The study variables were sex, race, education, region of Brazil, age group, Occupational Accident Communication (CAT), evolution and occupation. Data were organized and analyzed using the Stata® 14.0 software. Results: 30,802 cases were reported, with a predominance of women (67.3%) and black people (48%). Health workers/professionals were the most affected occupational group (57.5%), but other non-health-related occupations were also analyzed. The study also highlighted a high frequency of cases in which the variables race (16.1%) and education (27.3%) were not filled out. In addition, it was noted that only 16,1% of workers had their CAT issued. Discussion: The results suggest sociodemographic and occupational disparities in COVID-19 infections, reinforcing a greater need for attention by government agencies for public policies that guarantee greater protection to worker’s health. In addition to highlighting the low quality of filling in notifications of work-related COVID-19 in Brazil
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