• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.5
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• pp.726-736
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• 1999

The purpose of this study was to obtain the basal information for standard amount of clothing weight indoor climate and working condition with investigating seasonal changes of skin temperature and factors influencing on that in Koreans. Forty eight subjects in 5 age groups(6-11, 12-19, 20-44, 45-64, 65-76 years old) with both sexs were measured skin temperature indoor climate clothing microclimate clothing weight and skinfold thickness in neutral condition in each month throughout the year. The results obtained are summarized as follows : 1. Indoor climate koreans felt comfortable ranged 18.1-28.7$^{\circ}C$ and 51-74%RH. 2. Temperature inside the clothing ranged 30.8-32.3$^{\circ}C$ in males and 31.0-32.5$^{\circ}C$in females. There was a significant difference in temperature inside the clothing among age groups : That of 6019 age group was slightly higher than that at 45-76 age group. 3. Total clothing weight changed with season and increased in order of summer autumn spring and winter Total clothing weight of 65-76 age group was significantly greater on January and February. Breast skinfold thickness showed the smallest value in summer and the largest value in winter year. In addition to breast and abdomen skinfold thickness were larger in 45-67 age group while thigh skinfold thickness was larger in 6-19 age group. Skinfold thickness in females showed the smallest value in spring summer and the largest value in autumn and winter. In addition to triceps and suprailliac skinfold thickness were larger in 45-64 age group while thigh skinfold thickness was larger in 12-19 age goup. 5. Temperature of the lower limbs(hand, thigh. leg, and foot) showed significant correlation with the indoor temperature humidity inside clothing and total clothing weight. Temperature of the torso(breast and abdomen) showed significant correlation with the temperature inside clothing in all subjects. Abdomen skinfold thickness of all age group in male showed significant correlation with the abdomen skin temperature. triceps suprailliac and thigh skinfold thickness of 6-11 age group in female showed significant correation the upperarm abdomen and thigh skin temperature. Consequently clothing mdicroclimate total clothing weight and skinfold thickness showed significant difference in season sex and ages and had a slight effect on skin temperature.

• Science of Emotion and Sensibility
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• v.18 no.2
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• pp.45-54
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• 2015

This study carried out an experiment to identify subject's work effectiveness and energy saving effect using LED light. Towards this end, this study configured nine various lighting environments in order to control PWM (Pulse Width Modulation) and illuminance (lux), which are the characteristics of LED light. The PWM ratio of LED light was set as R:G:B=1:1:1, R:G:B=4:1:5, and R:G:B=8:7:7, respectively, and illuminance (lux) was set as 400 lx, 700 lx, and 1000 lx, respectively. In addition, the indoor environment was set temperature $20-24^{\circ}C$, humidity 50%-60%, and the amount of clothing 1. This study analyzed work effectiveness and energy consumption in nine lighting environments, each. Error correction was performed for work effectiveness analysis, and cumulative power consumption was measured in each lighting environment for energy consumption analysis. According to experiment results through the lighting environments suggested in this study, accuracy and spent time effectiveness were good in 700lux and higher than 400lux. For spent time, the best effectiveness was revealed in the suggested PWM ratio, R:G:B=8:7:7. The lowest power consumption on each illuminance (lux) was revealed in the order of R:G:B=8:7:7, RGB=1:1:1, and R:G:B=4:1:5. Therefore, pulse-width modulation effect is proposed in this paper was found to affect the efficiency and energy saving.

• Science of Emotion and Sensibility
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• v.24 no.4
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• pp.129-138
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• 2021

This study aimed to determine the effects of the shape and attachment position of stretchable textile sensors coated with carbon nanotube on their performance when used to measure children's joint movements. Moreover, the child-safe requirements for fabric motion sensors are established. The child participants were advised to wear integrated clothing equipped with the sensors of various shapes (rectangular and boat-shaped) and attachment positions (at the knee and elbow joints or 4 cm below the joints). The voltage change induced by the elongation and contraction of the fabric sensors was determined for arm and leg flexion-extension motions at 60 deg/s (three measurements of 10 repeats each for 60°and 90°angles, for a total of 60 repetitions). Their dependability was determined by comparing the fabric motion sensors to the associated acceleration sensors. The experimental results indicate that the rectangular-shaped sensor affixed 4 cm below the joint is the most effective fabric motion sensor for measuring children's arm and leg motions. In this study, we designed a textile sensor capable of tracking children's joint motion and analyzed the sensor shape and attachment position on motion sensing clothing. We demonstrated that flexible fabric sensors integrated into garments may be used to detect the joint motions of the human body.