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손환수,전도선,오성기 釜山外國語大學校 比較文化硏究所 1999 比較文化硏究 Vol.10 No.-
Abstract This study was attempted to evaluate and quantify the differences of physical fitness among 4 swimming events(free style, back stroke, breast stroke, butterfly). To determine whether the differences among them existed or not the following question was addressed, were winning athletes among the 4 swimming events physically different? When significant differences were found, efforts focused on describing and quantifying the differences. On the basis of results, it is planned to select some physical fitness batteries which could best discriminate the successful swimmers. The 5 physique factors and 6physical fitness tests as discriminators, such as hight, weight, chest girth, upper limb length, lower jump, reaction time, one-legged standing time, vital capacity. The subjects included 60 elite swimmers sample from Pusan swimmers Team. The speed computer programs were used for data analysis. The results as follows: 1. physique In height, the average of male butterfly athletes was 170.0±3.0cm and 161.0±3.8cm for female butterfly athletes. The result of ANOVA test showed a significance difference for both man and woman(P<.05). In body weight, there was a significance difference both in male butterfly athletes(67.0±3.4kg) and back strokes(70.0±8.1kg). In case of woman, there also was a significance difference(P<.001) in case of woman, there also was a significance difference(P<.001) in butterfly athletes(54.7±5.5kg). In chest girth, it showed a 95.6±3.1cm for male back strokers and 83.0±3.3cm for female. Both showed a significance difference(P<.05) in 74.6±1.5cm for male butterfly athletes and 72.0±1.4cm for female back strokers. In lower limb length, the significance difference was found in male, female butterfly athletes and female breasts strokers, female free style. In standing broad jump, both male and female free style section shoed a significance difference(P<.001). In whole body reaction time, there was a significance difference for both female back strokers in light (0.33±0.1sec) and man free style sprinters (0.27±0.02sec) in sound. Here, there also was a significance difference in back strokers. In one-legged standing time, male free style section showed an annual significance difference(42.3±22.6sec. on average). In vital capacity, difference on the level of P<.06 (5,307±411ml on average). This study was attempted to evaluate and quantify the differences of physical fitness among 4 swimming events(free style, back stroke, breast stroke, butterfly). To determine whether the diffemces among them existed or not the following question was adressed, werw winning atheletes among the 4 swimming events physically different± When significant differences were found, efforts focused on describing and quantifying the differences. On the basis of results, it is planned to select some physical fitness batteries wrich could best discriminate the successful swimmers. The 5 physique factors and Gphysical fitness tests as discrimnators, such as height, weight, chest girth, upper limb length, lower jump, reaction time, one-legged standing time, vital capacity. The subjects included 60 elite swimmers sample from Pusan swimmers Team. The speed computer programs were used for data analysis. The results as follows: 1. physique In height, the average of male butterfly athletes was 170.0±3.0㎝ and 161.0±3.8㎝ for female butterfly atheletes. The result of ANOVA test showed a significance difference for both man and woman(P<.05). In body weight, there was a significance difference both in male butterfly atheletes(67.0±3.4kg) and back strokes(70.0±8.1kg). In case of woman, there also was a significance difference(P<.001) in case of woman, there also was also was also was a significance difference(P<.001) in butterfly atheletes(54.7±5.5kg). In chest girth, it showed a 95.6±3.1㎝ for male back strokers and 83.0±3.3㎝ for female. Both showed a signficance difference(P<.05) in 74.6±1.5㎝ for male butterfly athelets and 72.0±1.4㎝ for female back strokers. In lower limb length, the significance difference was found in male, female butterfly athelets and female breasts strokers, female free style. 2. physical fitness In back strengh, there was a annual significance difference (P<.05) for both male butterfly athelets and breasts strokers. In case of woman, there also was a significance difference for both breasts strokers and free style sprinters. In standing broad jump, both male and female free style section shoed a significance difference(P<.001). In whole body reaction time, there was a significance difference for both female back strokers in light (0.33±0.1 sec) and man free style sprinters (0.27±0.02sec) in sound. Here, there also was a significance difference in back strokers. In one-legged standing time, male free style section showed an annual significance difference(42.3±22.6sec. on average). In vital capacity, difference on the level of P<.05 (5,307±411 ml on average).
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철도차량용 하이브리드 비접촉 제동장치의 dc 제동에 관한 연구
정환수(Hwan-Su Jung),한경희(Kyung-Hee Han),손원석(Won-Seok Son),이장무(Chang-Mu Lee),장길수(Gil-Soo Jang) 한국철도학회 2017 한국철도학회 학술발표대회논문집 Vol.2017 No.05
철도차량은 주로 공기제동 및 회생제동을 병행하여 제동력을 발생시키지만, 패드 및 디스크의 접촉으로 마모와 소음 문제가 발생하며 미세먼지를 증가시키는 것 뿐만 아니라 제동력이 변화하는 문제점을 지니고 있다. 문제점 개선을 위해 와전류 제동의 다양한 연구가 진행되어 오고 있다. 본 논문에서는 철도차량 제동 시에는 와전류 브레이크로서 동작하고, 운행 시에는 보조 동력원으로 동작할 수 있는 하이브리드 비접촉 제동기의 축소 모델을 제작하였으나 상이한 결과값의 문제점을 해결하기 위해 하이브리드 비접촉 제동의 다양한 요소 해석을 진행하고, 비교, 분석하여 dc 제동 특성에 대해 알아보고자 한다. Railway vehicles generate braking force primarily in combination with air brakes and regenerative braking, but contact with the pads and disks, they occurred a lack of wear and noise, as well as a change in braking force. Various studies have been conducted in order to improve the eddy current brake problems. In this paper, a miniature model of a hybrid non - contact brake that operates as an eddy current brake during rail vehicle braking and as an auxiliary power source during operation is produced. However, the results showed different values. In order to solve the problem, various elements of hybrid non-contacting brake were analyzed, and the dc braking characteristics were compared and analyzed.
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