THE INFLUENCE OF ASYMMETRIC AND UNEVEN THERMAL RADIATION ENVIRONMENTS UPON THE HUMAN BODY : In the case of constant operative temperature

Kurazumi, Yoshihito; Horikoshi, Tetsumi; Hirayama, Keitaro; Tsuchikawa, Tadahiro; Kobayashi, Yotaro

doi:10.3130/aijax.447.0_17

Cited by 9 publications

(11 citation statements)

References 5 publications

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“…Horikoshi et al [92] and Kurazumi et al [93] ran experiments with uneven and asymmetric subjects in the indoor environment and for an uneven asymmetric thermal radiation environment; the local thermal radiation was seen to affect the psychological response, showing that there is a fluctuation in this response.…”

Section: Thermal Manikin Modeling Of An Infantmentioning

confidence: 99%

“…Kurazumi et al [94] showed the parameters for uneven and asymmetric thermal environment factors that can be indicators with which to evaluate the effects on the human body of an uneven asymmetric thermal radiation environment. The effects of these parameters were shown to cause a large spread in the body's response.…”

Section: Thermal Manikin Modeling Of An Infantmentioning

confidence: 99%

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Thermal Manikin of Infant

Kurazumi¹,

Sakoi²,

Yamashita³

et al. 2019

ENG

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Compared to an adult, an infant requires more consideration regarding the thermal environment so it is necessary to evaluate the thermal environment as it affects infants. However, experiments on infant subjects regarding their thermal environment based on the different heat balance of their body cannot ethically be conducted. We could instead consider using a thermal model for the human body, but thermal manikins based on heat transfer per unit area are rare. Therefore, this study aims to develop a thermal manikin to model the heat transfer per unit area and the body form of an infant in order to evaluate the infant's thermal environment. When evaluating the thermal environment or heat balance of the body in the outside environment, it is essential to consider the asymmetry and unevenness of the temperature of the skin, as an element of the human body, and not just the unevenness and asymmetry of physical factors in the environment. Moreover, when receiving short wavelength direct solar radiation, light and shaded areas have significant differences in skin temperature. The following 20 body parts were investigated in the study: anterior head, posterior head, ventral trunk, dorsal trunk (including buttocks), right medial arm, right lateral arm, left medial arm, left lateral arm, right dorsal hand, right palmar hand, left dorsal hand, left palmar hand, right anterior leg, right posterior leg, left anterior leg, left posterior leg, right dorsal foot, right plantar foot, left dorsal foot, and left plantar foot. This paper measured the body surface area for each part of an infant's body in order to establish the form of an infant model from the view of the heat transfer area, and verified the validity of the model.

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Section: Thermal Manikin Modeling Of An Infantmentioning

confidence: 99%

Section: Thermal Manikin Modeling Of An Infantmentioning

confidence: 99%

Thermal Manikin of Infant

Kurazumi¹,

Sakoi²,

Yamashita³

et al. 2019

ENG

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“…Horikoshi et al [53] clarified that directional variations appear due to the influence of local thermal radiation on psychological responses of the body in unstable, asymmetric thermal radiation environments. Kurazumi et al [54] clarified the existence of parameters for unstable, asymmetric thermal radiation environments in thermal environment indices assessing body influences in unstable, asymmetric thermal radiation environments. A large variation was shown to occur in the physiological response due to the influence of these parameters.…”

Section: Relationship Between Etfe and Thermal Sensationmentioning

confidence: 99%

Ethnic Differences in Thermal Responses between Thai and Japanese Females in Tropical Urban Climate

Kurazumi¹,

Ishii²,

Fukagawa³

et al. 2016

AJCC

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The outdoor thermal environment might become worse than at present. It causes health injuries through the deterioration of the outdoor thermal condition. It is necessary to study how humans stay outdoors and adjust to thermal conditions. The purpose of this study was to clarify the influence of the outdoor tropical urban thermal environment on a subject who has been acclimatized to the environment studied using the outdoor thermal environment evaluation index ETFe. In addition, the tendency of human impacts was clarified through comparison to subjects from a temperate thermal environment region. As a result, it was found that an ETFe of up to 35˚C could be recognized as a temperate thermal environment. However, when the ETFe was greater than 40˚C, the subject could not tolerate the environment. There was not a significant difference of psychological reaction between Thai people, who were acclimatized to the tropical climate, and Japanese people, who were acclimatized to the temperate climate.

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“…For that reason, even though the thermal environment was same, the subject reaction showed some directivity. Kurazumi et al [43,44] clarified that there is a part of skin where its skin temperature can easily be affected in unequal and asymmetric thermal radiation environment. In this research left part of the human body skin temperature was measured.…”

Section: Relationship Between Etfe and Mean Skin Temperaturementioning

confidence: 99%

Behavioral Thermoregulation Model for Evaluation of Outdoor Thermal Environment

Kurazumi¹,

Sakoi²

2014

J Ergonomics

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In the outdoor environment, the effect of the physical environmental factors that compose the sensational and physiological temperature is remarkably large in comparison to the indoor environment. The purpose of this paper is to propose and develop a behavioral thermoregulation model in the outdoor environment, in order to predict the mean skin temperature for the evaluation of outdoor environment. This model is based on a Two-Node Model, and has three components: direct solar radiation, indirect solar radiation, and heat conduction. Each body part consists of core and skin layers. The model formula, by ratio of body weight of skin layer of heat conductance between skin and core layer, was included in this model. To verify this model, experiments were conducted. It was shown from the relation between ETFe (Enhanced conduction-corrected modified effective temperature) and mean skin temperature that it is possible to quantity explicitly the effects owing to outdoor environmental factors, short-wave solar radiation, heat conduction etc. It was made clear that the current model is valid for simulated mean skin temperature in the outdoor environment.

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THE INFLUENCE OF ASYMMETRIC AND UNEVEN THERMAL RADIATION ENVIRONMENTS UPON THE HUMAN BODY : In the case of constant operative temperature

Cited by 9 publications

References 5 publications

Thermal Manikin of Infant

Thermal Manikin of Infant

Ethnic Differences in Thermal Responses between Thai and Japanese Females in Tropical Urban Climate

Behavioral Thermoregulation Model for Evaluation of Outdoor Thermal Environment

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