JAPANESE JOURNAL OF BIOMETEOROLOGY
Online ISSN : 1347-7617
Print ISSN : 0389-1313
ISSN-L : 0389-1313
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Volume 46, Issue 1
Displaying 1-5 of 5 articles from this issue
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Original Articles
  • The thermoregulatory responses before and after the onset of sweating when wearing undershirts of different moisture absorption
    Tomoko Ishii, Ayumi Nakajima (Kamiji), Kozo Hirata
    2009 Volume 46 Issue 1 Pages 3-11
    Published: 2009
    Released on J-STAGE: March 27, 2009
    DOIhttps://doi.org/10.11227/seikisho.46.3
    JOURNAL FREE ACCESS
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    The purpose of this study was to make clear influence on thermoregulatory responses of the body while wearing two types of undershirts differing in moisture absorption by two percent, in the before and after the onset of sweating. Seven female subjects wore long-sleeved undershirts of circular knitting Polyester (P: moisture absorption 0.6%) or a circular knitting Cupro/Polyester mixtured (C: moisture absorption 2.6%) and kept at seated rest. The ambient temperature was changed to 26°, 20° and 35°C over 240 minutes. The results show, skin blood flow was significantly lower in C than that in P before the onset of sweating, and was significantly higher in C after the onset of sweating (p<0.05). The difference between C and P (C-P) in mean skin temperature was −0.52±0.33°C before the onset of sweating. After the onset of sweating, the difference became −0.03±0.16°C, significantly rose by 0.49°C (p<0.05). Local skin temperatures also rose after the onset of sweating. It is inferred that these changes was influenced by the facilitation of vaporization from skin and of heat of sorption from the undershirts due to higher moisture absorption in C, before and after the onset of sweating, respectively. It is clear that the influences of difference in moisture absorption between P and C on skin blood flow and temperature were differed before and after the onset of sweating.
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  • Questionnaire Survey of Summer Indoor Environments and Occupants' Body Temperature Regulation in Residential Buildings with Young Children
    Yuka Aritomi, Tetsumi Horikoshi
    2009 Volume 46 Issue 1 Pages 13-25
    Published: 2009
    Released on J-STAGE: March 27, 2009
    DOIhttps://doi.org/10.11227/seikisho.46.13
    JOURNAL FREE ACCESS
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    The objective of this paper is to find out how parents' consciousness and living behaviors affect their children's body temperature regulation and how parents decide what thermal environment is comfortable and suitable for their children, in their homes. Questionnaire surveys were conducted with of over 1100 families in the Aichi prefecture. It was found that the mothers' physical constitution and sensation of heat had a tendency to affect how they controlled the room temperature by air-conditioners. This suggested that the mothers adjusted room temperature and children's clothing to maintain a comfortable thermal environment for the children based on their own senses.
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  • The effects of hot spring bathing on stress reduction, compared with the effect of plain water bathing
    Masae Watanabe, Kiyoshi Moriya, Etsuko Kakuta (Yano), Yuko Agishi
    2009 Volume 46 Issue 1 Pages 27-34
    Published: 2009
    Released on J-STAGE: March 27, 2009
    DOIhttps://doi.org/10.11227/seikisho.46.27
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    At a spa resort, we carried out experiments to investigate the effects of hot spring bathing on stress reduction and relaxation, compared with the effects of plain water bathing. The experiments were conducted from November to December 2004. The subjects were eight healthy women from 57 to 67 years of age. They bathed for 10 minutes in two water conditions, i.e. hot spring water and plain water at 40°C, in a polyurethane bathing bag that was placed in a 40°C hot spring bath. After bathing, they rested in a supine position on a chair in a room at 28–29°C for 30 minutes. During hot spring bathing, the mean “Pleasure”, “Comfortable” and “Good Mood” score on the Emotion Spectrum of EEG significantly increased and the “Relax” score on the Mood Check List increased after bathing compared with those scores after plain water bathing. The mean skin temperature was higher after hot spring bathing than after plain water bathing. It is considered that hot spring water bathing promoted a pleasant feeling, maintained warmth and reduced psychological stress more than plain water bathing did.
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Note
  • Numerical simulation of the intense heat over the central Kanto Plain in 15–16 August 2007, using the regional meteorological model
    Yasushi Watarai, Kiyotaka Nakagawa, Yoshitaka Fukuoka
    2009 Volume 46 Issue 1 Pages 35-41
    Published: 2009
    Released on J-STAGE: March 27, 2009
    DOIhttps://doi.org/10.11227/seikisho.46.35
    JOURNAL FREE ACCESS
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    In this study, we performed the numerical simulation of 15 to 16 August, 2007, which was the typical case of the intense heat in the central Kanto Plain, using the regional meteorological model, in order to examine the factor in their heat. The maximum of surface temperature was found in the inland of northwestern Kanto Plain in both days. In 15 August, the mixed layer developed well, so that it was shown that the heat by solar radiation was the major factor in the increase of surface temperature. It was also found that no influence of sea breeze contributed to the formation of the maximum temperature area. On the other hand, the maximum of surface temperature was greatly influenced by the intense northwesterly foehn in 16 August, as well as the heat by solar radiation. It was suggested that the foehn did not follow the precipitation on the windward slope of the mountains.
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