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Titolo:
VALIDATION AND ADJUSTMENT OF THE MATHEMATICAL PREDICTION MODEL FOR HUMAN SWEAT RATE RESPONSES TO OUTDOOR ENVIRONMENTAL-CONDITIONS
Autore:
SHAPIRO Y; MORAN D; EPSTEIN Y; STROSCHEIN L; PANDOLF KB;
Indirizzi:
CHAIM SHEBA MED CTR,HELLER INST MED RES IL-52621 TEL HASHOMER ISRAEL SACKLER FAC MED TEL AVIV ISRAEL USA,ENVIRONM MED RES INST,ENVIRONM PHYSIOL & MED DIRECTORATE NATICK MA 01760
Titolo Testata:
Ergonomics
fascicolo: 5, volume: 38, anno: 1995,
pagine: 981 - 986
SICI:
0014-0139(1995)38:5<981:VAAOTM>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEMPERATURE;
Keywords:
SWEAT RATE; HEAT LOAD; THERMOREGULATION; MODELS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
Y. Shapiro et al., "VALIDATION AND ADJUSTMENT OF THE MATHEMATICAL PREDICTION MODEL FOR HUMAN SWEAT RATE RESPONSES TO OUTDOOR ENVIRONMENTAL-CONDITIONS", Ergonomics, 38(5), 1995, pp. 981-986

Abstract

Based on indoor laboratory studies, a mathematical model to predict sweat loss response was suggested as follows: m(sw) = 27.9E(req)(E(max))(-0.455) (g . m(-2). h(-1)) Under outdoor conditions this model was over estimating sweat loss response in shaded (low solar radiation) environments, and underestimating the response when solar radiation was high (open field areas). The present study was conducted in order to adjust the model to be applicable under outdoor environmental conditions. Four groups of fit acclimated subjects participated in the study. They were exposed to three climatic conditions (30 degrees, 65% rh; 31 degrees C, 40% rh; and 40 degrees C, 20% rh) and three levels of metabolic rate (100, 300 and 450 W) in shaded and sunny areas while wearing shorts, cotton fatigues (BDUs) or protective garments. The original predictive equation for sweat loss was adjusted for the outdoor conditions by evaluating separately the radiative heat exchange, short-wave absorption in the body and long-wave emission from the body to the atmosphere and integrating them in the required evaporation component (E(req)) of the model, as follows: H-r = 1.5SL(0.6)/I-T (watt) H-l = 0.047M(e.th)/I-T (watt), where SL is solar radiation (W . m(-2)), M(e.th) isthe Stephan Boltzman constant, and I-T is the effective clothing insulation coefficient. This adjustment revealed a high correlation between the measured and expected values of sweat loss (r = 0.99, p < 0.0001).

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Documento generato il 14/08/20 alle ore 07:21:26