Proceedings of Symposium on Human-Environment System
Online ISSN : 2434-8007
Current issue
Displaying 1-50 of 83 articles from this issue
  • Pages Cover1-
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (203K)
  • Pages Cover2-
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (129K)
  • Pages App1-
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (98K)
  • Pages App2-
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (48K)
  • Pages App3-
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (137K)
  • Pages App4-App17
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (549K)
  • Evaluating the Mitigating Effect to Thermal Environment by Continuity of Gangi at Takada, Joetsu City
    Ikusei Misaka
    Pages 1-4
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    : Promoting town plannning with adaptation for thermal environment, it is thought that a technique that utilizes the space characteristic of the region is necessary. In this study, to evaluate the continuity of Gangi, which is characteristic of snow country, thermal environment survey was conducted by fixed point and mobile observation in Takada, Joetsu city. From the survey results, because the effect of mitigating thermal environment by continuing gangi is large, it is possible to confirm the significance of preserving and utilizing gangi.
    Download PDF (1492K)
  • Kanami KAWASHIMA, Shinichi WATANABE
    Pages 5-8
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The objective of this study was to clarify the effects of parasol use by adults and children on heat stress mitigation. Taking into account the use of parasols by adults and children, parasols were placed 1.7m and 1.2m above the ground, respectively. Thermal environmental factors were measured under each parasol and in the sun as a reference. Black and white parasols with the same size were used for adults and children. Air and globe temperatures were the lowest at head height under the parasols compared to other heights. In the sun, the higher the height from the ground, the stronger the wind speed. Meanwhile, the wind speed at the head under the parasols became weaker because the parasol blocked the airflow. WBGT and UTCI reduction by the parasols were greatest at the head height and decreased as it approached the ground. For both adults and children, the white parasols had a greater heat stress mitigation than the black parasols. With the same color parasols, the heat stress mitigation at the head height was greater for children than for adults. Children with white parasols had the greatest heat stress mitigation, reducing MRT by 21.0°C, WBGT by 1.6°C, and UTCI by 4.9°C.
    Download PDF (994K)
  • Shinichi WATANABE, Natsuki SAITO, Naoki OKAMOTO, Jin ISHII
    Pages 9-12
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The objective of this study is to clarify the heat stress mitigation of parasols and rain umbrellas. Measurements were conducted at the open space covered with lawn at Daido University in July. Thermal factors were measured under parasols (black/white), rain umbrellas (black/white), and in the sun. UTCI values were derived from the measured thermal environment parameters and MRT calculated from the upward and downward long- and short-wavelength radiation fluxes. The white and black parasols blocked 99.3% and 98.9% of solar radiation, respectively. The black rain umbrella had a solar shielding rate of 95.1%, while the white one had a solar shielding rate of 53.0%, which approximately half of the solar radiation penetrated through the fabric. The downward long-wavelength radiation fluxes under the black fabrics were larger than that of the white fabrics due to the absorption of solar radiation on the fabric surfaces. A strong positive correlation was found between MRT based on the globe temperature and MRT calculated from long- and short-wavelength radiation fluxes. The white parasol had the greatest heat stress reduction, lowering MRT by 18.3 °C, UTCI by 3.7 °C, and WBGT by 1.3 °C. Meanwhile, the white rain umbrella had little reduction in heat stress.
    Download PDF (1516K)
  • Haruka OKUBO, Ineko TANAKA
    Pages 13-16
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Elementary school classrooms are required to save energy while the rate of air-conditioning installation increases. The wind of nature can be an opportunity to develop children's sensibilities. To utilize cross ventilation, the climate of temperate regions was analyzed and the thermal environment and heat stroke risk of an elementary school class were examined through simulation. As a result, it was confirmed that the risk of heat stroke in the classroom gradually increased from June to July. When eaves were installed on the south wall in late July, it was confirmed that WBGT dropped an average of 0.34 degrees and the risk of heat stroke was reduced. In late June, there is a time when the wind blows parallel to the school building. When windcatchers were installed in south windows in this period, the wind speed in the classroom increased about 1.7 times and PMV approached neutral zone. It was confirmed that children’s comfort can be enhanced by bringing a lot of wind into the classroom.
    Download PDF (1348K)
  • Effectiveness of Combination of Ventilated Working Wear and Ice slurry at Construction Site
    Yuji HIRANO, Shunsuke SOMEYA, Keita YAMAZAKI, Koichiro FUJISAKI, Yu ...
    Pages 17-20
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    A subject experiment was conducted at a construction site in the summer to evaluate the effects of wearing and drinking ice slurry on the physiological and psychological reactions of construction workers. Two pieces of ice slurry were put in the breast pocket of the work clothes, and after it melted, it was allowed to drink. Heart rate, skin temperature, microclimate temperature and humidity in work clothes, weight loss, water intake, etc. were measured, and sympathetic nerves were analyzed. The subjects were nine male workers. It was suggested that the increase in heart rate was suppressed by the influence of the ice slurry under the condition of the outside temperature of 30℃ or less, and the sympathetic nervous system was suppressed, and the parasympathetic nervous system became dominant.
    Download PDF (1517K)
  • Taketo SHIMIZU, Satoru TAKADA
    Pages 21-24
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    It has been reported that the moisture content of the skin stratum corneum changes in response to change in indoor humidity. When the moisture content changes, the shape of the skin sulcus cutis and crista cutis might change simultaneously. In order to understand the characteristics of the swelling and shrinking of the stratum corneum from the changes in surface morphology, experiments were conducted in which the forearms was exposed to step changes in humidity ‹high-low-high › with taking micrographs in each humidity condition. The image analysis was performed for the micrographs by using a 2D Fourier transform to calculate the power spectral density ‹PSD ›, which is an index of structural regularity ‹the percentage of continuous patterns in the image ›, and comparisons were made for each humidity condition. When the PSD was compared among humidity conditions, there was no significant difference in the high-frequency band. On the other hand, although there were differences in the direction of change, a difference in the mid-frequency band was found in PSD, indicating that the appearance of the skin changed with changes in humidity.
    Download PDF (3401K)
  • Tomoko MATSUBARA, Kunihito TOBITA
    Pages 25-26
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to reveal the effect of tactile textures of cosmetic samples on the classification task. When participants were asked to classify cosmetic samples, the classification time was significantly shorter for samples with tactile labels than with only visual labels. On the other hand, there was no significant difference in error attempt count.
    Download PDF (827K)
  • Kanoko ITO, Satoru TAKADA
    Pages 27-30
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Indoor environmental conditions such as air temperature, humidity, and air velocity have been suggested to be one of the causes of eye discomfort, which is a major complaint reported in offices and living spaces. As a pilot study to examine the effect of air temperature and air velocity on eye discomfort, we conducted an experiment using one subject; physiological and psychological responses related to eye discomfort were measured while the air around the eye was controlled at different temperatures (24–29°C) and velocities (0.5 m/s or lower) with constant absolute humidity. As a result, the exposure to dry airflow of 0.3 m/s or higher increased blink frequency and caused eye discomfort, dryness, and irritation. Lower ocular surface temperatures and higher blink frequency were observed under lower air temperature and higher air velocity. These results suggest that changes in air temperature and air velocity, even within the range expected in air-conditioned rooms, can affect the tear-film condition.
    Download PDF (8595K)
  • Sho ASANOME, Takaho ITOIGAWA
    Pages 31-34
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    One of the characteristics of summer in Japan is high temperature and humidity. Because of this characteristic, people in offices and schools may feel uncomfortable when they place their arms on desks due to non-evaporating sweat that stays between the skin and the desk. In this study, we examined the effectiveness of a board-like tool placed under the forearm with the aim of helping to alleviate such discomfort. The experimental environment was a room temperature of 34±1.5°C, relative humidity of 50%, and no wind. As a precaution against heat stroke, subjects were instructed to drink a 500 ml sports drink at room temperature during the waiting period. The skin moisture content of the forearms and the mass increase of the object were measured, and psychological responses were evaluated by questionnaire, and the following findings were obtained: 1) materials with low skin moisture content and which absorb sweat tend to be psychologically evaluated higher; 2) the texture of the material tends to affect psychological evaluation; 3) It was suggested that an air layer may reduce discomfort with respect to perspiration..
    Download PDF (1406K)
  • Hiroaki HIDA, Atsumasa YOSHIDA, Shinichi KINOSHITA
    Pages 35-36
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    An effective cooling site in a hot environment is the limb, which has a vascular network (AVA) with excellent heat dissipation properties. In this study, the effect of cooling the limbs with phase-change material (PCM) will be verified by subject experiments, and the thermal relationship between the amount of cooling and physiological response will be examined. Subject experiments were conducted in an artificial climate chamber under post-exercise cooling conditions (air temperature, relative humidity, and walking speed of 30°C, 50%, 4.0 km/h). Cooling of the limbs using commercially available cooling agents made of PCM material resulted in decreased blood flow rate and increased core temperature. It was found that depending on the cooling amount and environmental conditions, cooling the limbs with PCM could constrict blood vessels and inhibit heat dissipation from the human body. In the future, we will clarify the conditions under which core temperature decreases by limb cooling with PCM by subject experiments and consider its application to human thermal model.
    Download PDF (848K)
  • (Report 1) Comparison and Examination of Human Body Shape
    Ryo FUJIMOTO, Shizuo IWAMOTO, Ayano DEMPOYA
    Pages 37-40
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    When multiple human body heat radiation models are placed in a large-scale space, the aspect of each human body differs depending on the temperature distribution and other factors. In this report, we compare the shapes of human body models in a small space to evaluate the validity of a simple human body model intended to be installed in a large space.
    Download PDF (15060K)
  • (Part 3) Analysis of effects of both upper wind velocity and location of Machiya on the environment in and around Machiya using CFD analysis
    Tomoka SATOMI , Shinji YOSHIDA
    Pages 41-44
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to examine the effect of both upper wind velocity and location of Machiya in Naramachi, which is the old town of Nara, on the environment in and around Machiya using CFD analysis. The study area in the present analysis is a part of city block model of Naramachi in Edo era. The shapes and room assignment of Machiya model is simplified by references to typical Machiya where we carried out the field observation. Computational cases were set by the following two parameters: the upper wind velocity, and the facing direction of Machiya. The velocity is assumed to be 3.1m/s in the strong wind case, while 1.5m/s in the calm wind case. The facing direction is set to the following two cases: facing to southern direction (the shaded street),and facing to west direction (the sunny street). Thorough the examinations, the following two knowledges were clarified: (1) Wind direction in the main house was opposite to that of upper wind only when both the upper wind velocity was strong and the street was shaded. (2) The indoor wind velocity in the calm upper wind case was higher than that in the strong case.
    Download PDF (957K)
  • Ayaka KANI, Satoshi AIHARA, Ineko TANAKA, Hiroto YOSHIKAWA
    Pages 45-46
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    In response to the current energy conservation in housing focused on the exterior envelope performance, interior envelope insulation has been proposed to improve the thermal performance of living rooms both by the performance of the exterior envelope and by interior envelope and configuration of the layout of non-occupied rooms1). Therefore, in this study, influence of insulation thickness of the exterior and interior envelope on health and heating load in winter was verified by simulation for interior envelope insulation house. As a result, considering heat shock risk, comfort, and heating load, GW50 mm of interior envelope insulation is considered most suitable for GW100 mm of exterior envelope insulation for interior envelope insulation house in warm regions.
    Download PDF (1229K)
  • (Part 1) Basic experiment using a heating cylinder
    Kai YAMADA, Kouhei KUWABARA, Hitoshi WAKABAYASHI
    Pages 47-50
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    To calculate the convective heat transfer coefficient inside a ventilated working jacket (VWJ) with fans, experiments were conducted using a heating cylinder in a climate chamber. Wearing innerwear and the work clothes on a heating cylinder and using the fan to generate forced convection inside the work clothes, the convection heat transfer coefficient inside the work clothes is about 12.0 to 22.0 W/(m2・K). We compared the experimental values with the calculated values using dimensionless numbers. The empirical formula using the VWJ fan had a small error with the nondimensional equation. The convective heat transfer coefficient was also calculated under the condition of using a general circulator. In the experiment with the circulator, the difference between the empirical and the dimensionless formulae was larger than the VWJ fan condition. An airflow turbulance of each fan causes the difference between the experimental and the calculated values. The wind speed and convective heat transfer coefficient of the conditions using the VWJ fan were greater with the work clothes than without the work clothes.
    Download PDF (1838K)
  • Aya KIYOTA, Yoshiaki YAMATO
    Pages 51-54
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Since the sound environment in the space where infants and children spend their childhood influences their hearing development, it is considered necessary to give consideration to the sound environment. In this study, the impulse responses of three facilities for infants and children (nursery school, elementary school, and special support school) was investigated. In addition, measurements were conducted to examine the effect of improving room acoustics by installing commercially available sound-absorbing finishing materials. Although the nursery school was an old building, the room acoustics met the recommended values. The effect of the sound absorption effect of thick curtains was considered. It was suggested that curtains and furniture could improve the room acoustics. It was shown again that room acoustics tend to be a problem in open-plan classrooms. Classrooms in buildings after the formulation of the guidelines met the recommended values. Additional data accumulation is necessary to verify the results.
    Download PDF (1288K)
  • Ayane Doi, Masashi Yoshida
    Pages 55-56
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Recentecentry , there has been a lot of research on thermal environments in Since the year before last, the air conditioning settings in our school have been adjustable in each classroom, so we investigated how the sense of warmth and coolness changed from similar studies in the past. Questionnaires and measurements were taken twice a month to determine the clo value, which is the thermal resistance of the garment, and the subjective feeling of warmth and coolness and the degree of warmth in the garment. As a result, warm and cool sensations and clo values increased from summer to fall. In addition, temperature increased and humidity decreased inside the garments. One of the factors that contributed to this was suggested to be a change in the clo value.
    Download PDF (846K)
  • Ririka Numata , Masashi Yoshida
    Pages 57-58
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Recentecently , the extreme heat has placed an increasing burden on students who attend school every day. The school controls the temperature setting in each classroom, but it is difficult. In addition, the school building is divided between the southsouth-west and north north-east sides of the scho ol, and the thermal environment is expected to be different. If the characteristics of the thermal environment for each location in the classroom can be identified, it is expected to improve learning efficiency. In this paper, the thermal environment chara cteristics of different classroom locations were assessed by objective evaluation using PMV, and the effects of shading, ventilation and air conditioning were investigated. The results showed that in the southsouth-west classroom, the air temperature was higher on the window side and lower on the corridor side, and that the PMV stabilistabilized below 0.5 when air conditioning was installed.
    Download PDF (1271K)
  • Akihiro Yamagishi, Mae Shimoyama
    Pages 59-62
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    This study focuses on the relationship between the thermal environment and learning activities in special needs education schools. This paper examines previous studies and learning activities related to the thermal environment in special needs education schools. As a result, regarding the thermal environment of schools in recent years, there are reports on infection prevention, efficiency of energy consumption, and heat environment, but there are few research results on special needs education schools. In special support schools, establishment standards have been enforced and environment improvement has been promoted, and individual and group learning activities according to the characteristics and conditions of children's disabilities and mental and physical development stages have been incorporated. In the future, it will be important to accumulate knowledge about the thermal environment of special needs schools and organize and examine practical methods for school-site efforts.
    Download PDF (964K)
  • -Spatiotemporal sensing of volatile compounds-
    Koichiro IWAI, HAYAKAWA Kazumi , Nodoka OKA, Satoru MACHIDA, Takashi ...
    Pages 63-64
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The present study reports on the spatial distributions and time-course changes of air-quality in an indoor space placed the variety types of plants (Wood Infill). To visualize the spatiotemporal distributions of air-quality in the Wood Infill, a multipoint measurement system was developed. This system employs the passive sampler and the semiconductor odor sensors to obtain the air-quality distribution in the Wood Infill before/after touching the plants. The sampling and analysis of the air-quality distribution was performed for every 30 minutes. From the analysis of the gas chromatography-mass spectrometry, the concentration of terpenoid compounds derived from plants increased immediately after touching the plants and decreased within 30 minutes. The distribution of terpenoid compounds in the Wood Infill were observed. It seemed that the location and the species of plants affected the distributions of each terpenoid compounds.
    Download PDF (1310K)
  • -Spatiotemporal sensing by semiconductor odor senso sensors -
    Satoru MACHIDA, Koichiro IWAI, Kazumi HAYAKAWA, Nodoka OKA, Takash ...
    Pages 65-68
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The present study reports on the spatial distributions and time-course changes of air-quality in an indoor space placed the variety types of plants (Wood Infill). To visualize the spatiotemporal distributions of air-quality in the Wood Infill, a multipoint measurement system was developed. This system employs the passive sampler and the semiconductor odor sensors to obtain the air-quality distribution in the Wood Infill before/after touching the plants. The sampling and analysis of the air-quality distribution was performed for every 30 minutes. From the analysis of the gas chromatography-mass spectrometry and the quartz crystal microbalance, the distribution of first principal component scores describe a localization adjacent to the plants and a diffusion toward the center of the Wood Infill over time. Moreover, we clarified that the concentrations of volatile components derived from the plants increase drastically just after touching the plants and decrease in the initial state within 30 minutes.
    Download PDF (1263K)
  • Takaho Itoigawa
    Pages 69-70
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    This study focuses on heat stroke prevention behaviors, particularly air conditioning use, and examines not only the motives for using air conditioning, but also the motives for not using air conditioning, which can lead to heat stroke.In this study, the following conclusions were obtained from the questionnaire survey.1) Older people may be less likely to judge their own condition as heat stroke.2) Aging may make it harder to feel the heat associated with humidity.3) Aging is likely to motivate the use of air conditioners based on information that does not rely on the senses.
    Download PDF (786K)
  • -Effect of sex difference of sweat efficiency and rate-
    Kouhei Kuwabara
    Pages 71-72
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    To apply our prediction formula of mean skin temperature to female, the sex difference of perspiration characteristics was verified using data measured in previous research. No sex difference was observed for sweat efficiency calculated from sweat distribution of female. No sex difference was similarly observed for thermal sweating coefficient. There was no sex difference in perspiration characteristics.
    Download PDF (945K)
  • Shinji Yoshida
    Pages 73-76
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    In this paper, microclimate around a pedestrian with a parasol in an outdoor space in the summer season were examined by using CFD analysis. Three computational cases were carried out in the present analysis. In Case1, we examined the microclimate around a pedestrian without a parasol in Case1, while a pedestrian with a parasol held vertically in Case2. Additionally, in Case3, the zenith angle of the axis of the parasol was closed to the incident angle to the sun, compared with Case2. Meteorological conditions for the present analysis were assumed to be high noon on a typical scorching hot day in August in Tokyo. Through the examinations, it was clarified that implementing parasols affects both the flow and the temperature fields around a pedestrian. Future direction of this study is to implement a multi-node human thermoregulation model to the present computational method.
    Download PDF (1300K)
  • Tadahiro Tsuchikawa, Emi Kondo, Yoshihito Kurazumi
    Pages 77-78
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    For people with cervical and spinal cord injuries, wheelchair users who have difficulty regulating body temperature, the outdoor thermal environment can have a significant effect on body temperature regulation. For wheelchair users, the sun's altitude is higher in summer, so direct solar radiation on the horizontal thighs increases, and the thermal load increases for the body. The authors have been developing the solar shielding device that covers the thighs. In this study, the convective heat transfer effect and solar radiation shielding effect of the devices are clarified by model experiments. Key words: Wheelchair users, Body temperature control, Solar radiation shielding device
    Download PDF (1918K)
  • -Investigation of thermal resistance in the state of riding a stroller-
    Koushi OKAMOTO, Emi KONDO
    Pages 79-80
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    From the perspective of universal design in architectural planning, access with strollers has become possible in many facilities, and opportunities for infants to go out have increased. On the other hand, the deterioration of the outdoor environment due to global warming is said to have a particularly large impact on vulnerable people such as infants. In this study, we focused on the thermal insulation performance of the surroundings including the stroller while riding in the stroller and conducted an experiment using an infant thermal mannequin. As a result, we obtained thermal resistance values of 1.23 clo in summer, 1.39 clo in middle, and 1.97 clo in winter. It became clear that the thermal insulation of the baby wrapped in the stroller is more than twice that of the thermal insulation in the state of only clothes. Key words: infant, stroller, thermal resistance, thermal environment
    Download PDF (1103K)
  • Part II How to take breaks for workers and measurement of the thermal and air environment at rest area
    Yuito Ishizawa, Koudai Iinuma, Kouhei Kuwabara, Yuji Hirano, Shuns ...
    Pages 81-84
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    To investigate the current situation and issues of rest areas at construction sites, we measured thermal and air environment of a rest area at a construction site in Tokyo. A circulator was installed in the rest area and the number of people in the rest area and the wearing rate of ventilated working jacket (VWJ) were investigated. At the same time, we measured the air temperature, relative humidity, CO2 concentration, and ventilation rate in the rest area. As a result, there was a difference in the ratio of VWJ fan ON depending on the combination of the set temperature of the air conditioner and the circulator operating status. The influence of the circulator on the ventilation rate was small, and air was exchanged between the rest area and the conference room separated by a partition wall.
    Download PDF (1185K)
  • -Part III- Evaluation of Thermal and Airflow Characteristics of Ventilated Work Wear with Inner Mesh Pad of Different Thicknesses When Wearing Full Body Harness
    Ayumi Fukushima, Ayano Dempoya, Shizuo Iwamoto, Shimazaki Yasuhir ...
    Pages 85-88
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Inner mesh pads (meshes) with different thicknesses were attached to the inside of the ventilated work wear with fans, and the airflow velocity out of the opening and thermal insulation values (clo values) were measured. The thickness of the mesh attached to the inside was three conditions: 1.5 mm, 0.7 mm, and 0 mm (none). Particle Image Velocimetry (PIV) was used for airflow velocity analysis. The higher the airflow level of the fan in the work clothes, the faster the airflow velocity out of the opening of the work clothes. The thicker the mesh, the faster the airflow velocity around the anterior neck, but slower around the wrist. Attaching the mesh to the inside of the work clothes increased the thermal insulation. Thermal insulation was lower with 0.7 mm compared to 1.5 mm. It was suggested that by adjusting the thickness of the mesh for each site, the discharged airflow velocity can be secured while keeping thermal insulation low.
    Download PDF (1681K)
  • Kana OHMOTO, Takeshi SATO, Mizuki NAKAJIMA, Ryota MURANO, Macky KA ...
    Pages 89-90
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The impact of changes in ankle dorsiflexion angle and trailing limb angle due to up and down stair is unknown. This study aimed to investigate the effect of the abovementioned parameters on gait characteristics measured by trunk acceleration. A convenience sample of 5 healthy subjects women volunteered to take part in the study. During walking in the house, step and stride were assessed using three-dimensional acceleration analysis. Walking with handrails were assessed to evaluate symmetry, each left and right hand, respectively. The sway of trunk movements by calculating the harmonic ratio, autocorrelation coefficient, and root mean square using a wearable trunk accelerometer. There was a significant difference between plan walking and stage fall moving. The harmonic ratio tended to be higher in the stable direction of the plane. It was consequence to compare harmonic ratios to apply evaluate gait stability.
    Download PDF (839K)
  • Comparison of 2019 and 2021 winter surveys-
    Hiroko KUBO, Chiaki KIDO, Kiko OZEKI, Yuka TOKUTOMI, Michiyo AZUM ...
    Pages 91-94
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Before COVID-19, we have measured the daily activities of older adults living in Nara City with a multi-purpose pedometer, and measured the temperature and humidity in the living room and bedroom with thermometers. We were able to measure the living behaviors and thermal environment of home 24 of them in the winter of 2021, and compared them with the results of similar measurements in the winter of 2019, which were measurements taken before COVID-19. Before and with COVID-19, outing behavior decreased, and eating behavior and hobby activities at home increased. There was almost no difference in the amount of activity, such as the number of steps taken per day. Individual differences of daily living were large. The sleep onset time was slightly later, and there was almost no difference in the subjective sleep evaluation, but the number of awakenings during sleep increased. Although the length of time spent in the room increased, the temperature remained low, and no change was observed over the two years.
    Download PDF (2840K)
  • Case study of rural area in Nara prefecture
    Michiyo AZUMA, Erika Otomo, Hiroko KUBO, Naomi SASSA, Chiaki KIDO ...
    Pages 95-96
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    From the viewpoint of heat stroke prevention, we analyzed the characteristics of behavior related to the regulation of the indoor thermal environment with a focus on the frailty level of older adults living in a rural area of Nara Prefecture. The study participants were 19 older adults who attended a survey in the summer of 2021. Based on a frailty evaluation using the Kihon Checklist, 10 of the 19 participants were pre-frail, five were frail, and four were healthy. The results of a daily life questionnaire confirmed that the progression of frailty was associated with a lack of knowledge about heatstroke, low subjective satisfaction with sleep, and a tendency to be unaware of the indoor thermal environment. Participants with frailty tended to not control their indoor thermal environment in accordance with changes in temperature (e.g., using an air conditioner appropriately), indicating the need for effective countermeasures.
    Download PDF (1117K)
  • Noriko KAIHARA, Motoya HAYASHI, Satoru TAKADA
    Pages 97-98
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to determine the indoor humidity environment that prevents discomfort and disease caused by dryness, in order to reduce the health risks of the elderly under low humidity conditions. Previous reports have shown that under constant low humidity conditions, elderly subjects not only feel uncomfortable with changes in the condition of their skin and mucous membranes due to dryness, but also that even a decrease in moisture content on the surface of the human body can be difficult to notice. Focusing on elderly subjects who reported discomfort as to psychological factors, we report trends in skin moisture content and skin surface temperature of subjects in a constant low humidity environment (RH10%, 28℃).
    Download PDF (1049K)
  • Zhang Chule, Draganova Vanya Y., Kazuyo Tsuzuki
    Pages 99-102
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    A spring field study was conducted in two university dormitories in the Tokai region of Central Japan. The study aimed at understanding the correlation between subjective thermal responses as well as whether nationality was affecting the responses. It was observed that nationality significantly affected thermal sensitivity and preference. The percentage of air conditioning use for both groups was about 10% , and the rest were free-running. Both acceptable rates of occupants were invariably above 90% at each air temperature. The relationship between temperature and amount of clothing was investigated. The slopes of the regression lines were 0.097 and 0.021 for Japanese students and International students, respectively. The correlation coefficients were too small. Further research is needed to better understand the difference between Japanese and International students' clothing levels at the same temperature.
    Download PDF (1165K)
  • Hikaru ENOMOTO , Minae KAMESAKI , Hiroko TANAKA , Sachi MASAOKA
    Pages 103-104
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    We conducted an internet survey of 1200 subjects aged 20s to 60s, across Japan. The survey showed differences among generations and genders on questionnaires about impressions they had in classes, and about learning contents they should have been taught at school in the field of Housing in Home Economics.
    Download PDF (967K)
  • Azumi Ishida, Takaho Itoigawa
    Pages 105-106
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Personal space is a space in which one feels uncomfortable when others intrude. The size of personal space varies depending on surrounding conditions, psychological state, and other factors. No previous studies have examined the effects of room temperature or color temperature. In this study, we examined the effects of room temperature and color temperature of lighting on personal space. Nine combinations of room temperature and color temperature were set, and personal space and psychological responses were measured under each condition.
    Download PDF (988K)
  • -Examination by virtual space with a head mounted display-
    Eisaku NISHIKI, Jin ISHII
    Pages 107-110
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to examine the effects of differences in measurements, door position and undercut of a toilet stall on sense of time and impression. A virtual reality head mounted display was used to evaluate these effects. 13 college students participated in the experiment. A total of 8 experimental conditions, combining 2 conditions each of measurements, door position and undercut of a toilet stall were used. Sense of time and impression were evaluated for each. Three-way ANOVA was used for the analysis. Regarding sense of time, the results showed that the small measurements were perceived as longer than the standard measurements. Regarding impression evaluation, the standard measurements were evaluated more positively than the small measurements, such as " comfortable, " "spacious " and " natural. " In the door position, the front was evaluated " more vivid " and " brighter " than the side.
    Download PDF (1121K)
  • Miwako KOMATSU, Reina OTSUKA, Shigeko SHOYAMA
    Pages 111-112
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Visibility evaluation experiments were conducted on reflective wristbands in five colors for two groups: a young age group and an elderly-simulated group. Reflective materials were worn on the wrist, ankle, and wrist + ankle, and 150 samples were used at 10m intervals at distances ranging from 10m to 100m on a sidewalk at night. Although there were differences depending on the distance, the reflector visibility evaluation of the young age group was significantly higher than that of the elderly-simulated group in all three wearing positions of the five reflective material colors ‹ p < 0.05 ›. Yellow had a visibility rating of 3.5 ‹ between " barely visible " and " somewhat visible " › or better at 40m of low-beam illumination for both groups. In addition, both groups had the lowest visibility ratings when the reflective material was worn on the wrist.
    Download PDF (955K)
  • Yoshinori KOMATSU, Mitsuru EGOSHI, Hinano KAI
    Pages 113-116
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to understand how the deviation of the center of gravity of light formed in a non-uniform lighting environment due to local lighting affects the combination of desirable illuminance and color temperature that has been studied so far under general lighting. As a result, low color temperature tends to be preferred in non-uniform light environment, and low color temperature tends to be highly evaluated when the center of gravity of light is low. In addition, it was confirmed that when the illuminance is high, the evaluation is also high when the center of gravity is high.
    Download PDF (2138K)
  • Tsunagu IKEDA, Yoshimi TAMAI, Naoki MATSUBARA, Hiroaki HORIYAMA, K ...
    Pages 117-118
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Promoting the use of wood and wood products is an important issue for the positive circulation of forest resources and the prevention of global warming. However, few studies have investigated which users of wood and wood products are interested in using which types of wood products. In this study, multiple regression analysis was conducted to examine the relationship between users' characteristics, attitudes, and values and their intentions to use wood products, using their liking of wood and their intentions to use four types of wood products ‹ building materials, furniture, tableware, and accessories › as objective variables and their age, gender, attitudes and values, and childhood residential area as explanatory variables. The results of the analysis showed that attitude and value had significant positive standardized partial regression coefficient ‹ β › for all the objective variables, indicating that people with naturalistic values tend to prefer wood and want to use wood products. In addition, it was found that characteristics other than attitude and value were also related to the intention to use some types of wood products.
    Download PDF (874K)
  • Daiki HAYAKAWA, Takaho ITOIGAWA
    Pages 119-122
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Clarify the relationship between the impression aspect of restrooms evaluation and the physical quantities that can be manipulated during the actual design process. In order to explore approaches to improve the cleanliness of the impression aspect of restrooms. Subjects were asked to Overall restroom evaluation and for each restroom location. Physical quantities were measured for the color of each part material and the dimensions of each part. Based on the data, a correlation analysis between impression evaluation and physical quantities. The results showed that the beauty of the space, whether the space is artificial or not, and the brightness of the space were correlated with the sense of cleanliness. Among them, the beauty and brightness of the space were correlated with the color of the wall surfaces. Designing a bright wall surface makes the space feel beautiful and bright. As a result, it was suggested that the space would feel more comfortable and cleaner as well.
    Download PDF (1716K)
  • Maya AKIZUKI, Tomoko MATSUBARA, Kunihito TOBITA
    Pages 123-124
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The effect of a feeling of something strange ‹ FSS › in historic landscapes on environmental preference was examined based on the mere exposure effect paradigm. Neither the effect of the FSS nor the mere exposure effect on the preference occurred after repeated exposures to the FSS landscape. Future research needs to design experiments that remove the effects of generalization.
    Download PDF (824K)
  • Takami IMANISHI
    Pages 125-128
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The objective of this study is to find out the elements that constitute the evaluation axis of interior style. Using materials related to seven kinds of interior style classification, we extracted descriptions corresponding to the six elements of ' form ', ' color ', ' material ', ' adjective ', ' age ' and ' region '. As a result of organizing these descriptions, it is shown that the elements of " simple ", " natural ", " luxury ", " history ", " modern " and " location " constitute the evaluation axis of interior style.
    Download PDF (2017K)
  • Tsukio TODA
    Pages 129-132
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    The purpose of this study is to examine the relationship between practical training in wooden construction and interest in DIY housing for college students in architecture. The main results are as follows; 1 › it was found that DIY, which is mainly made of wood that is easy to process, is meaningful and fun, and it is easy to gain interest. 2 › It was hoped that the ingenuity of wooden craftsmanship that the students had learned from carpenters would be utilized in the DIY of houses, leading to the practice of environmental consideration lifestyle.
    Download PDF (1242K)
  • Case study on Omou Kai
    Taeko YANAI, Tokuma YANAI
    Pages 133-136
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Japan has vast mountainous regions, most of which are dominated by agriculture and forestry. In recent years, the rapid depopulation of the region has resulted in the decline of industry due to the aging of the population and lack of successors, and as a result, many marginalized communities are disappearing. In order to revitalize and revitalize communities in this region where local communities have collapsed, we believe that it is essential to reconstruct heart-warming, face-to-face relationships and organically reorganize local networks. To this end, it is necessary to set up a "place" for discussion and exchange among the networks. It is necessary to create an atmosphere in which participants can maintain a level relationship with each other and talk freely with each other. The creation of these "places" is a time-consuming effort that must be pursued steadily. In this report, we present an overview of the activities of the "Shobara Omoou kai" a forum for discussion on "various themes" for rediscovering the region, and the seven meetings held since its establishment in 2021 to form such a forum.
    Download PDF (1035K)
  • Part 2: Description of seasonal sensation from "Danchotei Nichijo " in 1918
    Tetsumi HORIKOSHI, Satomi KATO, Kazuo KATO, Takeyoshi ISHIMATSU, Y ...
    Pages 137-140
    Published: 2022
    Released on J-STAGE: November 21, 2023
    CONFERENCE PROCEEDINGS FREE ACCESS
    Using Kafu Nagai 's "Danchotei Nichijo 1918 ", we extracted descriptions related to the human sense of the seasons, thermoregulatory behavior, and phenology. Based on the description, we investigated how the relationship between the seasons and human life changed over the years. As a result, it was found that there were many characteristic descriptions of winter and autumn in terms of sense of season and behavior. The phenology was described mainly for flowers throughout the year. A relationship between living environment and season was found.
    Download PDF (1268K)
feedback
Top