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이철원,나석주 대한용접접합학회 1993 대한용접·접합학회지 Vol.11 No.3
용접공정에 시각센서를 도입하여 고정 오차, 용접물 준비 상태에 상관없이 유연성을 확보할 수 있고 용접부 형상에 따라 용접 변수를 조절하는 적응제어가 가능하다. 본 해설에서는 용접 자동 화에 이용되는 시각센서의 원리를 설명하였고 상업화되어 쓰이고 있는 시각센서들을 소개하였다. 시각센서를 용접 공정에 적용하기 위해 센서의 신뢰도 향상, 센서와 로봇간의 정보 교환, 용접환 경으로부터 센서의 보호기술등의 개발이 요구됨을 알 수 있었다. 지난 10여년간 용접자동화에 기 계시각을 도입하고자 하는 연구가 활발히 진행되어 자동차, 항공기, 원자력 발전 설비 등의 생산 현장에서 시각센서의 우수성이 입증되고 있다. 현재 접촉식 센서나 아크센서에 비해 가격이 높은 단점이 있어 상업화에 어려움이 있으나 필요 부품들의 계속적인 가격 하락으로 점차 시각센서의 이용이 증대될 것이다. 특히, 아크센서로는 추적할 수 없는 박판 용접과 레이저 용접등의 정밀 용 접공정에서 수요가 커질 것으로 예상된다.
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원문 : 크레아틴-중탄산나트륨의 복합투여가 암-에르고미터 운동수행력에 미치는 영향
이철원 ( Cheol Won Lee ) 한국운동생리학회(구 한국운동과학회) 2014 운동과학 Vol.23 No.3
이철원. 크레아틴-중탄산나트륨의 복합투여가 암-에르고미터 운동수행력에 미치는 영향. 운동과학, 제23권 제3호. 257-266 2014. 본 연구는 크레아틴, 중탄산나트륨, 그리고 크레아틴과 중탄산나트륨의 복합투여가 암-에르고미터(arm-ergometer)를 이용한 상지 근기능에 미치는 효과를 알아보기 위해 경기도 소재 Y대학교 체육계열 남·여학생 17명을 대상으로 실시하였다. 무선추출법을 통해 크레아틴 투여집단(n=7), 중탄산나트륨 투여집단(n=5), 크레아틴과 중탄산나트륨의 복합투여집단(n=5), 총 3 집단으로 나누어 암-에르고미터를 이용한 상지 근기능 사전검사(pre-test) 후 집단별 로딩(loading)이 완료된 5일 후 사후검사(post-test)를 동일하게 실시하였다. 자료처리는 통계패키지 SPSS Ver. 12.0을 이용하여 모든 변인의 측정결과를 평균과 표준편차로 산출하고, 집단 및 시기 차이에 대한 주효과검정과 집단과 상호작용효과를 알아보기 위해 반복측정에 의한 이원변량분석 (Two-way repeated measured ANOVA)을 실시하였으며, 모든 통계적 유의수준은 p<.05로 설정하였다. 본 연구의 결과 암-에르고미터를 통한 검사 항목에서 최고 파워, 피로지수, 체중당 피크파워, 안정시 젖산농도 등에서 시기에 따른 유의한 차를 나타내었으나, 집단 간 유의한 차이는 나타나지 않았다. 결론적으로, 크레아틴과 중탄산나트륨 그리고 크레아틴과 중탄산나트륨의 복합투여는 암-에르고미터를 이용한 상지 운동수행력에 긍정적인 영향을 미치는 것으로 나타났으나, 복합투여의 우수성은 나타나지 않았다. Lee, Cheol-Won. The Effect of Combined Creatine and Sodium Bicarbonate Supplementation on Arm Ergometer Performance. Exercise Science. 23(3): 257-266, 2014. The purpose of this study was to assess the effects of creatine, sodium bicarbonate and combined creatine and sodium bicarbonate supplementation on upper limbs with arm-ergometer. Seventeen students majoring in physical education were randomly assigned to 3 groups [creatine (n=7), sodium bicarbonate (n=5), creatine & sodium bicarbonate (n=5)]. Pre-test consisted of muscular function of upper limbs with arm-ergometer and after 5 days later for creatine and sodium bicarbonate loading, post-test was processed with the same way as pre-test. Statistical analysis was performed by two-way repeated measured ANOVA for intervention. Significance was accepted at p<.05. The following results were obtained from this study. Peak power, fatigue index, peak power/kg and peak attainment time of arm-ergometer test were significantly (p<.05) increased by time but no difference among the groups. In conclusion, creatine, sodium bicarbonate and combined creatine & sodium bicarbonate supplementation favorably affected muscular function of upper limbs with arm-ergometer but there were no significant difference among the groups.
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이철원,정선희 公州大學校스포츠科學硏究所 2000 스포츠科學硏究所論文集 Vol.- No.14
The purpose of this study was to serve as a basis for more successful individual practice and skill of players and more effective instruction and game strategy of leader in middle school tennis team, by examining the relationship between each type of skill and score and the frequency of rally in girls' singles, the cause of win or defeat, and each skill's importance for successful game. The subjects in this study were the girl players who participated in the 2000 Kyonggi Province Classified Tennis Championship middle school quarterfinal and the 20th Mugunghwa Cup National Women Tennis Competition quarterfinal. Three factors were examined in this study : (1) the percentage of success or failure of stroke for both winners and losers, (2) the mean frequency of rally for both winner and loser groups, and (3) the total points each group made or allowed its opponent by stroke. The findings of this study were as below: 1) As a result of analyzing individual stroke's success or failure percentage for both winners and losers, the type of skill whose frequency of being used was significantly different between them was serve, receive, forehand ground stroke, backhand ground stroke and forehand volley. 2) The mean rally frequency of the winner groups per point was 5.56 times, and that for the loser groups was 5.83 times. This showed that the winner groups exercised more aggressive attack. 3) As a result of examining the total points each group made or allowed its opponent in attempting stroke, ground stroke was identified as the major source of score for both winner and loser groups. Receive, volley and passing shot were more successful than the other skills, and they made more score by the opponent's mistake than on their own.
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규칙적인 스트레칭이 체격 및 체력 향상에 미치는 영향 : 중학생을 중심으로 Focus on Middle school students
이철원,최인기 公州大學校 藝體能硏究院 스포츠 科學硏究所 2004 스포츠科學硏究所論文集 Vol.16 No.-
The purpose of this study is to provide the fundamental data about effective stretching program based on the result of performing regular stretching as an warming up during the physical education class to improve students' physique and physical fitness. For this experimental study, a total of 30 male students and 40 female students of the 3rd grade in Gwang-ju Y-middle school, who were divided into an experimental group and a comparative group, were pre-measured by each domain. Since that, a comparative group started the main class after running 200m-track four times and exercise for juveniles during 12 weeks. And an experimental group started the main class after doing 12-item-stretching program for 15 minutes during the experimental period of 12 weeks. The results of the measurement were analyzed through the pre-measurement and post-measurement of each group. The conclusion of the experiment is as follows: 1. In the aspect of physique, the meaningful difference of the two groups on the growth of their height and legs' length was P〈 0.05. This indicates that the growth of body is not the result of the experimental treat but the result of natural growth. 2. In the aspect of physical fitness, according to the data analyzed through the pre-measurement, post-measurement, inter-groups and in-groups after performing standing-long-jump and sit-up at sitting down regularly, the meaningful difference of the experimental group was p<0.05 while that of the comparative group was not p<0.05. It means that Gymnastic class using stretching program has a big effect on the physical flexibility and quickness of middle school students
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