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구형과 신형 소방 보호장갑의 착탈 시험 및 동작 기민성 평가를 통한 통합형 착용 시험법
배규태,김도형,신혜영,이주영,Bae, Gyu-Tae,Kim, Do-Hyung,Syn, Hye-Young,Lee, Joo-Young 한국의류학회 2017 한국의류학회지 Vol.41 No.5
This present study proposed a newly developed test method to evaluate the dexterity and mobility of a firefighter's protective gloves. The first step evaluated the mobility and dexterity of the current type of fire protective gloves and three new types of protective gloves using Don-doff test, ASTM dexterity, Minnesota dexterity, Bennett hand tool test, and ASTM torque test. Three firefighters ($47.3{\pm}5.0yr$ in age, $178.6{\pm}2.9cm$ in height) participated in a series of experiments. The second step was to design and suggest an integrated test method based on the results of the first experiment. As a result of the first experiment, we concluded that 1) the mobility and dexterity tests for firefighting gloves should include both wet and dry tests, 2) The three kinds of dexterity tests could be integrated into one test, and 3) The don-doff test and the torque test should be independent from the newly developed integrated test. In summary, we suggested a simplified test method that combined ASTM dexterity, Minnesota dexterity, and Bennett hand tool test. The integrated system can reduce total time spent on dexterity tests and improve the validity of the test in terms of firefighters' manual work.
배규태(Kyutae Bae),최진철(Chinchul Choi),이우택(Wootaik Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper describes a linear disturbance state estimator for a motorized seat belt (MSB) system. The MSB provides active safety functions like as a pretension in order to caution and protect a vehicle driver. To realize the MSB functions, it is necessary to sense state information such as a current, angular velocity, and disturbance load. Angular velocity and load sensors are expensive and require a special arrangement of mounting. In this paper, a linear state estimator is proposed to estimate the disturbance load without additional sensor. The estimator is designed by use of a state space model of the system with the disturbance load. Comparison results between the measured and estimated values verify effectiveness of the proposed estimator.
WBGT 27ºC와 32ºC의 고온 다습 환경에서 운동과 휴식 시 피부 수분도 및 생리적 주관적 발한 반응에서의 연령차
백윤정,배규태,정다희,김규랑,이주영 한국생활환경학회 2019 한국생활환경학회지 Vol.26 No.4
The purpose of this study was to investigate physiological and subjective sweat responses of elderly and young males in hot and humid environments. Nine elderly and 11 young males participated in the following experimental conditions: WBGT 27oC (Air temperature 30oC, and air humidity 70%RH) and WBGT 32oC (35oC, 70%RH) with two activity levels (sitting on a chair for 60 min and walking on a treadmill for 60 min). The walking speeds were 4.0 km/hr for young males and 2.3 km/hr for elderly males. The results showed that 1) total sweating rate was 34.3% and 36.6% smaller for the elderly than for the young in WBGT 27oC and 32oC, respectively (p<.05). Skin hydration at rest was less for the elderly than for the young in both WBGT 27oC and 32-oC. The skin of the young males was quickly and evenly saturated throughout the whole body from the beginning in WBGT 32oC, whereas the elder males’ skin was slowly and unevenly saturated. At rest, elderly males expressed greater humidity and sweat sensations in WBGT 27oC than in WBGT 32oC which was interpreted as perceptual confusions, while such perceptual confusions were not found during exercise in either WBGT 27oC or WBGT 32oC. These results suggest that the elderly’s perspiration and other sweat responses in hot and humid environments were impaired psychologically as well as physiologically.
WBGT 27℃와 32℃의 고온 다습 환경에서 운동과 휴식 시 피부 수분도 및 생리적 주관적 발한 반응에서의 연령차
백윤정(Yoon Jeong Baek),배규태(Gyutae Bae),정다희(Dahee Jung),김규랑(Kyu Rang Kim),이주영(Joo-Young Lee) 한국생활환경학회 2019 한국생활환경학회지 Vol.26 No.4
The purpose of this study was to investigate physiological and subjective sweat responses of elderly and young males in hot and humid environments. Nine elderly and 11 young males participated in the following experimental conditions: WBGT 27℃ (Air temperature 30℃, and air humidity 70%RH) and WBGT 32℃ (35℃, 70%RH) with two activity levels (sitting on a chair for 60 min and walking on a treadmill for 60 min). The walking speeds were 4.0 km/hr for young males and 2.3 km/hr for elderly males. The results showed that 1) total sweating rate was 34.3% and 36.6% smaller for the elderly than for the young in WBGT 27℃ and 32℃, respectively (p<.05). Skin hydration at rest was less for the elderly than for the young in both WBGT 27℃ and 32-℃. The skin of the young males was quickly and evenly saturated throughout the whole body from the beginning in WBGT 32℃, whereas the elderly males’ skin was slowly and unevenly saturated. At rest, elderly males expressed greater humidity and sweat sensations in WBGT 27℃ than in WBGT 32℃ which was interpreted as perceptual confusions, while such perceptual confusions were not found during exercise in either WBGT 27℃ or WBGT 32℃. These results suggest that the elderly’s perspiration and other sweat responses in hot and humid environments were impaired psychologically as well as physiologically.
여름철 무강우 시 들잔디 옥상녹화 식재지반에 따른 관수주기 및 관수량 산정
주진희 ( Jin Hee Ju ),배규태 ( Gyu Tae Bae ),김원태 ( Won Tae Kim ),윤용한 ( Yong Han Yoon ) 한국환경과학회 2012 한국환경과학회지 Vol.21 No.3
The purpose of this study was to identify the irrigation intervals and the amount of suitable growing substrate needed to achieve the desired shallow-extensive green roof system during a dry summer in Korea. In terms of treatment, three types (SL, P6P2L2, P4P4L2) with varying soil mixture ratios and two types (15 cm, 25 cm) with varying soil depths were created. The results have been analyzed after measuring growth and soil water contents. The difference of growth by treatment was significant in terms of green coverage, height, leaf width and photosynthesis. In measurement of chlorophyll content, no difference was detected when measured against soil depth. According to the growth measurement of Zoysia japonica with respect to differing soil mixture ratios in the 15 cm-deep treatment, a statistical difference was detected at the 0.05 significance level in photosynthesis. In case of green coverage, height, chlorophyll content and leaf width, no statistical significance was observed. In case of the 25 cm-deep treatment, a statistical significance was observed in height and photosynthesis. In terms of green coverage, chlorophyll content and leaf width, no statistical significance was detected. In comparisons of soil moisture tension and soil water contents, the irrigation interval and amount were 8 days and 14.9 L in the SL (15 cm) treatment, respectively. The irrigation interval showed for 10 days a 1.3-fold increase, and the irrigation amount was 27.4 L 1.8-fold more than SL (25 cm), respectively. For P6P2L2 (15 cm) treatment, the irrigation interval and amount were 12 days and 20.7 L, respectively. However, an irrigation interval under P6P2L2 (25 cm) was for 15 days 1.3 times longer than P6P2L2 (15 cm), and an irrigation amount of 40 L was 1.9 times more than that under P6P2L2 (15 cm). In P4P4L2 (15 cm) treatment, it was indicated that the irrigation interval was 15 days, and the irrigation amount was 19.2 L. It was not needed to irrigate for 16 days under P4P4L2 (25 cm) treatment during the dry summer and the longest no-rain periods. The irrigation interval and amount under P4P4L2 were 1.8-fold and 1.3-fold, respectively, more than SL treatment as affected by soil mixture ratio. Comparatively P4P4L2 had more 1.3-fold and 0.9-fold in irrigation interval and amount more than P6P2L2. Therefore, it can be noted that different soil depth and soil mixture ratios had a significant effect on the irrigation interval and amount.