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| Servadio, Pieranna; Belfiore, Nicola Pio. |
| In this paper, according to ISO 2631/1, 1997, the influence of the mechanical vibrations on human health is evaluated and assessed with four methods: the health guidance caution zones (HGCZ), the estimated vibration dose value (eVDV), the fourth power vibration dose value (VDV), a combination of various methods presented in literature. The normative refers to the HGCZ, which involves the average RMS vibration emission level and its exposure time during a given working day. Values of crest factor for the operator seat showed that Z-axis was the more solicited, even if all the crest factor values are below 9. Results of mechanical vibration in respect of comfort and health, according with the method of the HGCZ, showed that only case B, at higher forward... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agricultural Engineering; Tractors; Vibrations; Ergonimics whole body vibration; Tractor; Comfort; Health risk; Tyres. |
| Ano: 2013 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2544 |
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| Nascimento,Fernanda Gatti de Oliveira; Aguiar,Hellen Cris Pinto; Rodrigues,Gustavo Moya; Guimarães,Ednaldo Carvalho; Nascimento,Mara Regina Bueno de Mattos. |
| ABSTRACT: The aim of this study was to determine among nine temperature-humidity index (THI) equations, the one that best represents the effects of heat stress on crossbred dairy calves reared in a tropical environment. Twelve male and female calves, aged 20 to 60 days, and raised in a tropical pen were evaluated. Respiratory (RR) and heart rates (HR), rectal (RT), body surface (BST), dry bulb (Tdb) and wet bulb (Tbw) temperatures, partial vapor pressure (Pv), relative humidity (RH) and dew point temperature (Tpo) were quantified in the morning and afternoon. Nine THI equations were calculated. The highest correlation between physiological variables and this was used to select the best THI equation. Averages for nine THI equations, Tdb, Twb, Pv, Tdp, RR,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cattle; Comfort; Dairy; Thermal index. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100652 |
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