평행봉 몸 굽혀 2회전 뒤 공중 돌아 내리기 동작의 국면별 운동학적 분석

윤창선,강대식 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.3

This thesis has an aim to examine the influence on landing of successful salto by the difference of athletic factors of salto backward tucked dismount on the parallel bars. This thesis analyzed six national representative players dividing them into the skill group (G1) who got more than 9.5 point and the unskilled group (G2) who got less than 9.5 point based on the average point by four international referees utilizing three dimensional image analyses photographed with video camera, and it got the conclusion of the athletic factors dividing into each aspect as followings. 1. As for the time spent by the groups when the thesis divided them into each aspect, G1 spent more time than G2. It's because G1 acted in stability at the moment of staying in the space and landing as it spent much time in the space with fast down swing and release, but G2 on the contrary, acted fast at the moment of space of four aspects with slow down swing and release. And its landing was unstable at the movement of low height. 2. As for the positional change in each aspect, the parallel position of G2 increased than that of G1, and the increased parallel position made the unstable salto and landing . As for the change of vertical position, at the time of down swing in the first aspect, what G1 acted at the low position of the second aspect at the high position seemed to be an act to release fast falling the high joint down, and it made salto high and made landing stable. 3. As for speed change of high joint in each aspect, G1 acted with fast horizontal speed generally at the time of release, aspect of space, and aspect of landing because of right horizontal speed at the time of down swing, and it seemed to be an act to get rotary power of double salto. As for the vertical speed, G1 acted with a much more vertical speed than G2 in four aspects with a big up-down movement by the fast vertical speed at the time of down swing and release. It means that G1 acted fast with a fast vertical speed of the high joint to get the height to stay in the air. 4. As for the change of the angle of the high joint in each aspect, G1 acted a bigger down swing and release than G2 utilizing the stretched body of the high joint at the time of down swing and release. As for change of angle of shoulder, G1 acted down swing with the shoulder joint accessed nearer than G2 to the body. At the time of down swing, it acted with a big angle of shoulder joint to stretch high shoulder at the time of swing. In addition to it, at the time of release, G2 escaped from the hand more slowly than G1 because of big angle. It made the movement of space and landing movement unstable. 5. As for change of angular speed in each aspect, G1 acted with a fast high joint down swing from the start to the first aspect. It acted with a slow speed of the angle stretching the high joint in the second and the third aspect so that it could get fast angular speed in the forth and the fifth aspect. As for the change of shoulder joint, G1 acted with a fast angular speed in the aspect of space and that of landing movement by the fast speed of shoulder joint at the time of release. In addition to it, fast angular speed of the shoulder joint in the release aspect of space made the rotary power of double salto.

공기과잉율의 변화가 에탄올 혼합연료 기관의 배기 특성에 미치는 영향

윤건식,박대곤 창원대학교 산업기술연구소 2001 産技硏論文集 Vol.15 No.-

Ethanol is an attractive alternative fuel for automotive engine to overcome the limit of petroleum resources and pollution problems. Ethanol contains oxygen in itself and has ability to improve thermal efficiency owing to higher octane number than gasoline. Also it can be used as clean fuel for low emissions. The effect of gasoline-ethanol blends on the performance characteristics including exhaust emission of the MPI gasoline engine were examined. The experiments were carried out over the various air-fuel ratio. The blending rates of ethanol were selected as 10 to 30 percent according to the analysis of the properties of blended fuels. The emission characteristics of ethanol-blended fuels showed the similar trend with those of gasoline fuel, in general. Any observable quantitative differences in concentration of nitric oxides and carbon monoxide were not seen when the blended fuels were used, while the concentration of hydrocarbon is slightly reduced by the use of ethanol blended fuels compared with gasoline fuels.

栽培中 Tomato 果實의 窒酸鹽 및 亞窒酸鹽과 Ascorbic acid의 含量變化

尹衡植,申大休,崔載春,權重浩 慶北大學校 1982 論文集 Vol.33 No.-

This experiment was carried cut to investigate the relationship between nitrite and ascorbic acid contents in two kinds of tomato fruits namely, Bokwang, Suekwang, which were different distinguished in growth periods during culture. The results obtained were as follows. The nitrate content in two kinds of tomato fruits was relatively higher in Bokwang than Suekwang. It indicated high content as 5.8-12.5 ppm in flesh and 0.3-2.5 ppm in gelatinous pulp. In the beginning of growth period, nitrate content in flesh was 50-62.5ppm, and in the latter period was 21.3-38.4ppm. In the case of gelatinous pulp, it was decreased from 14.0-16.2ppm in the beginnig period to 9.3-10.7ppm in the latter period. In the case of nitite, there was no difference between two varieties. Nitrite content during growth increased from 0.15ppm to 0.21ppm in flesh and from 0.06ppm to 0.1ppm in gelatinous pulp. There was no difference between two varieties during growth in total ascorbic acid content and its concentration was 24.2-27.5mg in gelatinous pulp and was 13.8-18.6mg in flesh. The difference between two parts was about 10mg. In the changes of nitrate and nitrite content in tomato fruits, nitrate was decreased, whereas nitrite content was increased. In the changes of nitrate and ascorbic acid content in tomato fruits, nitrate content was decreased but that of ascorbic acid was increased slightly. In the changes of nitrite and ascorbic acid content in tomato fruits, nitrite content was increased and that of ascorbic acid was slightly increased too.

관상동맥 스텐트 내 재협착의 발생에 미치는 임상적 관동맥 조영술적 요인들

윤혁준,김기식,박형섭,이영수,현대우,한성욱,허승호,김윤년,김권배,박남희,원경숙 대한순환기학회 2003 Korean Circulation Journal Vol.33 No.12

퍼머제의 중금속 농도에 관한 연구

윤복연,문덕환,박명희,황용식,함성애,손병철,김대환,이창희,김휘동,이채언 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.5

Objective : This study was conducted to prepare the fundamental data on heavy metal concentration in hair permanents agents and to prevent the health impairment due to heavy metal. Methods and Material : The author determined of 5 heavy metals(Pb, Cr, Mn, Ni, and Cu) concentration hair permanent agents in the market with flameless atomic absorption spectrophotometer. Results : The results were as follows: 1. The geometic mean concentrations of total subjects were 0.04㎍/g for Pb, 0.09㎍/g for Cr, 0.06㎍/g for Mn, 0.03㎍/g for Ni, and 0.04㎍/g for Cu. 2. The most highest mean concentrations of heavy metals in hair permanent agents by using type were Cr for wave agent and straight cream agent, Cu for setting iron agent, Cr and Cu for coating perm agent. 3. Metal most hlghest mean concentrations of heavy in hair permanent agents by type of color was green for Cu. 4. The mean concentration of Cu among 5 heavy metals in hair permanent agents by marker was most highest. 5. There was most statistically significant difference on mean concentration in hair permanent agents between domestic and foreign products. 6. The exposure amount of heavy metal concentration by one time using the permanent agent were 4.O㎍ for Pb, 9.O㎍ for Cr, 6.0㎍ for Mn, 3.O㎍ for Ni and 4.0㎍ for Cu. Conclusion : As above results author suggest to prepare the preventive program of health impairment due to heavy metal by long term chronic exposure to who were using the hair permanent agents hair designer and customers.

경기력 수준별 기계체조선수의 형태학적 비교

김대식,이상종,윤신중,이일재 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.3

This research aims at examining Physical Characteristics of apparatus gymnast by degrees, Physical Traits are important information to choose better apparatus gymnast and to predict the ability of improvement, To do this, 8 national team members, 8 such-like substitutes, and 8 general team members, 24 apparatus gymnast in total were subjected, Analyzing average value with two variants performed two times. The research made a conclusion as following. 1. Weight makes difference in apparatus gymnast according to the level of competence, National team members were the lightest, and substitutes, and general team members in turn. 2. Skinfolds makes difference in apparatus gymnast's iliac crest, front thigh, medial calf, subscapular, eiceps, supraspinale and abdominal according to the level of competence. 3. Girths makes difference in apparatus gymnast's forearm(maximum), gluteal(hips), arm(relaxed), arm(flexed & tensed), thigh(1cm gluteal), thigh(mid troch-tib-lat), calf(maximum) and ankle(minimum) according to the level of competence. 4. Lengths doesn't maim difference in apparatus gymnast according to the level of competence. 5. Breadths doesn't make difference in apparatus gymnast according to the level of competence.

재원기간중 사망한 급성 심근경색증 환자의 임상적 특징

현대우,김기식,신이철,박소영,배장호,한창엽,김윤년,김권배 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9

AE 신호의 주파수분석에 의한 Chatter진동의 감시

조대현,이상태,원종식,정윤교 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.5

A machine tool generally has some serious stability problems in the form of tool chatter during the cutting process. Chat-ter vibration deteriorates the surface finish, reduce tool and machine life, accelerates machine tool system component wear, and may lead to an unacceptable noise sound in the working environment. In this study, the behavior of spectral density of AE signal and principal cutting force signal in order to monitor the chatter vibration in the cutting process has been investi-gated. From the results, the reliability of proposed monitoring method has been confirmed.

상심실성 빈맥환자에서 관상정맥동의 형태비교

현대우,김윤년,박소영,한성욱,허승호,김기식,김권배 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.4

학습난이도 조절이 다운증후군아동의 일탈행동에 미치는 효과

김윤영,이영연,이대식 한국정신지체아교육학회 2003 지적장애연구 Vol.5 No.-

본 연구의 목적은 일반학급주도 통합교육을 받고 있는 다우중후군 정신지체아동의 비학습행동 감소와 학습난이도 조절의 기능적 관계를 알아보는 데 있었다. 대상아동은 다른 사람의 물건을 자주 집어가고, 가방 속의 물건을 모두 꺼내어 주변을 어지럽히며, 아무데나 낙서하고 색칠하는 등의 비학습 행동을 보였다. 중재 방안으로, 일반교육과정의 교과와 학습주제는 동일하지만 내용과 학습방법은 대상아동의 학업 및 행동 수준에 맞도록 낮추어서 과제를 제시하는 학습난이도 조절 전략을 사용하였다. 연구대상은 단일대상으로 인천G초등학교 1학년 여자아동 1명이었다. 연구는 2단계에 걸쳐 수행되었다. Ⅰ단계는 ABC 기능평가와 기능분석 단계로, 행동 관찰과 기능분석을 통해 비학습행동이 학습 환경 요인과 기능적관계에 근거하여 학습난이도 조절 전략을 선정하였다. Ⅱ단계에서는 선정한 학습난이도 조절을 적용했을 때 비학습행동 감소에 미치는 영향을 분석하였다. 분석을 위한 자료수집은 사건 중심측정으로 시간간격별 부분표집법을 적용하여 정해진 시간 간격동안 비학습 행동이 발생하였는지 관찰하여 기록하였다. 연구설계로는 ABABAB 반전설계를 실시하였다. 실험결과, 학습난이도 조절 지도전략은 비학습행동 감소에 긍정적인 영향을 미쳤다. 본 연구는 통합교육을 하고 있는 일반교사가 특수아동의 문제행동을 해결하기 위해 기능평가와 단일대상 연구기법을 사용하여 적절한 지도 전략과 그 효과 검증이 가능함을 보여주고 있다. The purpose of this study was to determine the functional relationship between controlling learning difficulty and a decrease in nonlearning behaviors of the Down's syndrome mentally retarded child who was learning in integrative education. Nonlearning behaviors of the subject were as that take away others' things repeatedly, take out things of a bag and scatter around, scribble and paint on anything as paper. Controlling learning difficulty meant teaching strategies that subjects and themes of the general curriculum are identical, but contents and methods were presented properly to the subject. The subject of this study was single and first grader of G elementary school in Incheon. This study consists of two stages. The first was composed of an ABC functional assessment and functional analysis. Then nonlearning behaviors was related to the variable of learning environment and determined the teaching strategies. The second was selected controlling learning difficulty - teaching strategies, and then nonlearning behaviors decreased when controlling learning difficulty was given with the child. The direct observation and partial-interval recording were used for data collection. Nonlearning behaviors was observed from 8:40 a.m. to 9:20 a.m. for 40 minutes general education class. And for the record and measure of behaviors, the partial-interval recording of event-based recording was used. The study design was used of ABABAB reversal designs. As a result, the teaching strategies based on functional assessment and analysis had a positive influence on nonlearning behaviors, nothing but another behaviors characteristic and thought and attitudes of the subject. The study applied the functional assessment and the single subject research, the implication of the study showed that the method is effective for general teachers to determine teaching strategies in exceptional children's problem behaviors. Therefore, the general teachers should clarify relationships between the exceptional children's problem behaviors and the learning environment variables, make an effort to help ??