Journal of human and living environment
Online ISSN : 2433-2836
Print ISSN : 1340-7694
ISSN-L : 1340-7694
Volume 20, Issue 1
Displaying 1-22 of 22 articles from this issue
  • Article type: Cover
    2013 Volume 20 Issue 1 Pages Cover1-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages App1-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages App2-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages App3-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Index
    2013 Volume 20 Issue 1 Pages Toc1-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Index
    2013 Volume 20 Issue 1 Pages Toc2-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Tadakatsu OHNAKA
    Article type: Article
    2013 Volume 20 Issue 1 Pages 1-6
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    The purpose of this study was to clarify the physiological and subjective responses to heat of people who made a self-assessment of being sensitive to the heat, and their methods of coping with the heat in their homes during the summer. A field survey of the thermal environment of subjects was performed at their homes in the summer. The subjects were divided into two groups of 10 young females (21 to 23 years), a sensitive to heat (HS) group and a non-sensitive to heat (NS) group. The thermal conditions of each subject's house were measured every two minutes for a week, and skin temperatures of the subjects at 7 sites (forehead, chest, forearm, hand, thigh, calf, foot) were also measured using a radiation thermometer every hour while they were at home. Thermal sensation and clothes worn were recorded at times of skin temperature measurements. There were significant relationships between ambient temperatures and thermal sensations in both groups. The regression coefficient (slope) of the HS group's regression line was smaller than that of the NS group's significantly (P<0.01). Subjects in the HS group reported being "slightly sweaty" at 30.2℃ room temperature, which was 0.5℃ significantly lower than that in the NS group (P<0.05). The room temperatures which subjects evaluated as "no change " in the preference sensations were 27.9℃ for the HS group and 28.5℃ for the NS group respectively, showing a significant difference at P<0.01. The clothes worn in houses were 0.27 clo in the HS group and 0.25 clo in the NS group, although this difference was not statistically significant. Subjects in the HS group were sensitive to the heat and obtained thermal comfort in cooler thermal conditions. They had a tendency to establish comfortable thermal conditions using air-conditioning even under the conditions of wearing light clothes in summer.
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  • Wu SONG, Kentaro ODA, Tomoko UENO-TOWATARI, Yoshihiro SHIMOMURA, Tetsu ...
    Article type: Article
    2013 Volume 20 Issue 1 Pages 7-12
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    This paper conducts an experiment to explore the physiology response of a group of subjects during nightly sleep, after their exposure to red, green, and blue monochromatic light during the forenoon. Informed consent was obtained from the subjects, who were nine male college students with normal color vision. The subjects' eyes were exposed to 638nm, 523nm and 465nm monochromatic LED light sources, with irradiances of 73.4μW/cm^2, 74.2μW/cm^2, and 76.9μW/cm^2, respectively. The experiment measured the subjects' saliva melatonin, urinary melatonin, rectal temperature, OSA, and polysomonogram,. In statistical analysis, the methods of ANOVA (with the primary factor being the monochromatic lighting conditions) and Bonferroni were employed to make a multi comparison of the mean values of the varying measurements mentioned above. It can be found that the rectal temperature value under 465nm was significantly higher than that under 638nm (P<0.01). According to the Electroencephalogram during the whole sleeping process, the measurements under 465nm condition were significantly higher than those under 523nm condition during the 2nd sleep cycle (P<0.05). Moreover, through a comparison between the percentage of varied sleep stages on testing day and that of the contrasting day, it can be found that the duration of sleep stage 4 with exposure to the monochromatic light of 465 nm reduced significantly than that with exposure to the monochromatic light of 638 nm (p<0.1). Therefore, exposure to the monochromatic light with the wavelength of 465 nm has the effect of preventing the sharp drop of rectal temperature and reducing deep sleep.
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  • Tomonobu IMAKU, Tetsumi HORIKOSHI
    Article type: Article
    2013 Volume 20 Issue 1 Pages 13-27
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    Using the predicted comfort clothing PCC based on the thermal balance equation of the human body, this research creates the distribution map of secular change of the sensational climate of "a cool summer" in Japan, and examines the characteristics. Therefore, the daily highest PCC were used for the examination.Through each age, there were many amounts of PCC on the north, few tendencies were shown by Ogasawara and Sakishima islands, and PCC in Kyoto showed values fewer than the circumference. In the 1960s, to northern Tohoku, it was 0.9clo and they will be Kyushu and about 0.4clo stand from Kansai to the west. In the 1970s, PCC from Kanto to the north was the same tendency as the 1970s, and western part of Japan presented the hotter summer tendency. PCC of 1980s of southern Hokkaido and Tohoku was low. In the 1990s, there were higher PCC from the north to Kanto, there were few PCC in Shikoku and Kansai, and it increased in the west. The 2000s were a cooler tendency most. The main influence factor of a rise, the drop of PCC is temperature, but the wind velocity tends to be high in the contribution ratio as the influence factor.
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  • Koichiro NISHIO, Eri HORAI, Naoki MATSUBARA, Tomoaki SAWASHIMA
    Article type: Article
    2013 Volume 20 Issue 1 Pages 29-39
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    The aim of this research is to examine the actual living conditions under summer heat at a care home for the mentally handicapped and to analyze the characteristics and problems associated with such conditions. Temperature measurements and interviews were conducted at four care homes for the mentally handicapped in the Chugoku region. The survey results indicated that most residents required assistance in terms of body temperature adjustment, but the attendants provided comprehensive assistance and maintained a suitable temperature in individual rooms. Nevertheless, problems were also identified in several cases, such as wide fluctuations in temperature within a short period of time, air conditioning systems inadvertently operated in heating mode during the summer, and excessively low room temperatures. These problems were found to frequently occur when no attendant was present.
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  • Yoshiaki ISAKA, Ayuko MIYAKAWA, Kunihito TOBITA, Naoki MATSUBARA, Yosh ...
    Article type: Article
    2013 Volume 20 Issue 1 Pages 41-49
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    This paper discussed the effects of setting up air-conditioners into public schools on the learning attitude, health and environmental education based on the continuing investigation for three years. 1) Most of pupils and students felt "comfort" for the thermal environment of air-conditioned classrooms. 2) Evaluation of most of the teachers was high and tended to increase through three years, the effect on learning attitude were noticeable. 3) As the number of the teachers were small those who think that setting up air conditioners leads to the environmental education, it will be necessary that teachers should try to do environmental education by teaching the amount of energy consumption.
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  • Yoshihito KURAZUMI, Tadahiro TSUCHIKAWA, Yoshiaki YAMATO, Tomonori SAK ...
    Article type: Article
    2013 Volume 20 Issue 1 Pages 51-61
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    The purpose of this paper is to clarify the heat transfer coefficients of the human body under forced convections, focusing on body posture and airflow direction. The heat transfer coefficients locally at the body were delivered for the head and tail airflow directions by means of subjective experiments. The body postures studied were either sitting in chair with legs stretched-out or assuming normal sitting position. The convective and radiant heat transfer coefficients locally at the human body were proposed for the studied postures and airflow directions respectively. Empirical formulas for convective and radiant heat transfer coefficients of the whole body taking into account the heat transfer areas were also proposed. The convective heat transfer coefficients for the head airflow direction were larger than the tail ones. Moreover, as the air velocity increased, the difference between the convective heat transfer coefficients for both airflow directions tended to increase. The properties of convective heat transfer coefficients of the leg-out sitting position are different from the chair sitting position's one. Thus, it is necessary to use the coefficient defined by the posture of the seated person.
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  • Yoshihiro KATO, Tetsumi HORIKOSHI
    Article type: Article
    2013 Volume 20 Issue 1 Pages 63-76
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    The objective of this paper is for double skin with the function of saving consumption energy to show clearly how it has expressed as a facade design. The architecture examples with the double skin of 60 buildings were investigated to which of 43 kinds of seven-item component factors it would correspond. Analyzing by Quantamanized Theory III, the following 3 axes were obtained: the 1st axis was interpreted as the "curved surface -unevenness" concerning configuration, the 2nd axis as "movable - tree planting" concerning environmental control, and the 3rd axis as the "industrial commodity - natural material." concerning a material. Using the sample scores of the examples, class cluster analysis was conducted and double skin has been classified into ten groups. For example, the group of the curtain wall with equipment was continuation of a plane and the form of the curved surface. In the group of the movable louver, it became a uniform design of the lattice using glass, metal, etc. as a material. The example of the environmental control by tree planting formed one cluster except for one independent example. The classified group corresponded with the classification of the environmental control technique in many cases, and had that the design feature was also common within the group. Consequently, it is thought that environmental control technique corresponds to design feature of each group.
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  • Narihito TAKIMOTO, Tetumi HORIKOSI, Junko YUDATE
    Article type: Article
    2013 Volume 20 Issue 1 Pages 77-83
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    The objective of this paper is to establish an index indicating comfortable seating cushion. The following materials were used in subjective experiments and local compression experiment: 18 kinds of cushion materials by the combination of multiple layers of Urethane foam with different stiffness. Sixteen male and female subjects participated the experiments and evaluated the cushions using 11 kinds of evaluation items by SD method. In the local compression experiment pours gypsum into the modification space of the examination object which received load, and maximum cave-in depth, end cave-in depth and cave-in cross section curve of each cushion were measured. The sitting sensation were found considering the amount of modification of the cushion material. There were found to be strong correlations between the modification characteristic and 7 kinds of the subjective evaluations. The multiple regression equation to estimate the sensation of seating for the cushion was derived from the maximum cave-in depth, end cave-in depth and cave-in cross section.
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  • Takamine KUROMITSU, Naoki MATSUBARA
    Article type: Article
    2013 Volume 20 Issue 1 Pages 85-98
    Published: 2013
    Released on J-STAGE: March 22, 2018
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    This study deals with dwelling life satisfaction and residents' consciousness on living environment of Yunnan District in China. As the research method, we first compare the answers to the questionnaires which were conducted in China with those previously done in Japan, then investigated the result with three perspectives, attributes, comparison with the previous studies, the relationship between the residents' consciousness of living environment and how much satisfied they are with it. (The investigation period was performed from July, 2009 to August.) The results are as follows: 1. They has a high consciousness of satisfaction for the relation of their neighborhood and the residential attachment 2. In comparing the criteria for choosing the residences, the people in Yunnan were likely to put more importance on their individual situations than the house structures and their settlement consciousness. 3. Factor analysis results indicated the following four categories: -"regional environment", "housing environment", "relation of neighborhood", and "living environment"-. 4. More than 90% of the examinees answered that people' affection to traditional architectures and their consciousness of the rows of the houses should be preserved in future. 5. In future, the remaining important problem is the improvement of the consciousness of disaster prevention.
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages 99-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages 100-104
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages 105-107
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages 108-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages 109-110
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages App4-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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  • Article type: Appendix
    2013 Volume 20 Issue 1 Pages App5-
    Published: 2013
    Released on J-STAGE: July 05, 2018
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