Fog
Mostrando 1-12 de 109 artigos, teses e dissertações.
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1. Cognitive sequelae of COVID-19, a post-pandemic threat. Should we be worried about the brain fog?
Arquivos de Neuro-Psiquiatria. Publicado em: 2022
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2. Assessment of Total Attenuation and Adaptive Scheme for Quality of Service Enhancement in Tropical Weather for Satellite Networks and 5G Applications in Nigeria
Abstract The dynamic weather condition is a major concern for optimum channel utilization in recent times, especially at higher frequencies with larger bandwidth for 5G applications. Over the years, rain-induced attenuation among the hydrometeors has been linked as the major cause of signal impairment especially at the frequency, f ≥ 10 GHz. However, when
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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3. Protección de acero para instrumentos quirúrgicos con recubrimientos duros en base carbono tipo DLC
ABSTRACT Martensitic stainless steels can be used in different applications such as surgical instruments where a good wear and corrosion resistance are required. Surface modification treatments such as nitriding improve the mechanical properties of these steels, however; they affect the corrosion resistance. For this reason, the DLC (Diamond Like Carbon) coa
Matéria (Rio J.). Publicado em: 19/07/2018
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4. Comportamiento bi-modal de una fundición gris y un acero estructural al carbono en corrosión atmosférica marina acelerada
ABSTRACT According to data gathered in the last Metal Foundry Industrial Production Survey [1], approximately 46% of the industrial production of ferrous alloys is gray-iron. In this context the study of the atmospheric corrosion resistance of gray-iron becomes interesting to asset its useful life when subject to weathering conditions. The studies of gray-ir
Matéria (Rio J.). Publicado em: 22/06/2017
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5. Environmentally-assisted Fatigue Crack Growth in AA7050-T73511 Al Alloy and AA2050-T84 Al-Cu-Li Alloy
The aim of this study was to evaluate and compare the effect of low temperature and saline environment on the fatigue crack growth behavior of the AA7050-T7451 Al alloy and the recently developed AA2050-T Al-Cu-Li alloy. Fatigue at room and low temperature and corrosion-fatigue tests were carried out using an applied stress ratio (R) of 0.1, 15 Hz frequency
Mat. Res.. Publicado em: 04/12/2015
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6. Application of Artificial Neural Networks for Fog Forecast
ABSTRACT: This study examines the development of a system that assists in planning flight activities of the Academia da Força Aérea (AFA) so that meteorological data can be used to predict the occurrence of fog. This system was developed in MATLAB 8.0 by applying multilayer perceptron-type artificial neural networks and using an error correction algorithm
J. Aerosp. Technol. Manag.. Publicado em: 2015-06
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7. Survey and analysis of optical density of dental films processed manually in portable dark chambers
Introduction Intraoral film processing can be performed manually using chambers manufactured from opaque material to prevent light from entering and consequently blurring images. The aim of this study was to evaluate whether portable darkrooms used in offices, clinics and educational institutions prevent the entry of light during the processing of intraoral
Res. Biomed. Eng.. Publicado em: 2015-03
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8. Testes fitoquímicos em extratos foliares de Oeceoclades maculata Lindl. (Orchidaceae)
O presente trabalho teve por objetivo determinar a capacidade antioxidante de Oeceoclades maculata. A atividade foi determinada de acordo com a capacidade do extrato hidroalcoólico das folhas reduzir o radical DPPH. Os resultados obtidos permitem concluir que os conteúdos de polifenóis e flavonas/flavonóis são maiores no extrato preparado a frio (EBHF)
Rev. bras. plantas med.. Publicado em: 2014-12
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9. Perfil histoquímico das fibras do músculo bíceps braquial do macaco-prego (Cebus apella, Linnaeus, 1758)
Uma análise geral do comportamento do “Cebus apella” mostra que este primata quando desloca para se alimentar ou realizar outra atividade apresenta diferentes maneiras de locomoção. Estas informações mostram que o músculo bíceps braquial deste animal é usado freqüentemente nas suas atividades de locomoção, mas deve ser lembrado ainda que este
Braz. J. Biol.. Publicado em: 2014-08
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10. Propriedades farmacológicas da Aloe vera (L.) Burm. f.
A Aloe vera (L.) Burm.f. tem sido utilizada há milhares de anos na medicina tradicional para o tratamento de diversos males. O intuito desse trabalho foi o levantamento bibliográfico de artigos que evidenciassem a atividade farmacológica da Aloe vera. A revisão contemplou livros e periódicos nacionais e internacionais indexados nas bases de dados MEDLIN
Rev. bras. plantas med.. Publicado em: 2014-06
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11. Caracterização anatômica, histoquímica e de classes de metabólitos secundários de folhas de Guzmania lingulata (L.) Mez.
Na medicina natural pouco se sabe sobre a importância curativa da maior parte das espécies pertencentes à Bromeliaceae. Tal fato evidencia a necessidade da realização de investigações para a comprovação de possíveis potenciais fitoterápicos em espécies dessa família. Guzmania lingulata é caracterizada como sendo uma das espécies de bromélia m
Rev. bras. plantas med.. Publicado em: 2014-03
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12. Effect of salt-water fog on fatigue crack nucleation of Al and Al-Li alloys
Fatigue and corrosion-fatigue tests were performed to quantify the fatigue properties of AA2524-T3 and AA2198-T851 Al alloys. High cycle axial fatigue tests were carried out under air and salt-water fog conditions. In air, the specimens were fatigue tested at a frequency of 50 Hz, using specimens with and without preconditioning in a salt spray chamber, and
Mat. Res.. Publicado em: 26/11/2013