GaAs 기판위에 성장된 단결정 AlAs 층의 선택적 산화 및 XPS ( X-ray photonelectron spectroscopy ) 분석

이용수 ( Young Soo Lee ),이용수 ( Young Soo Lee ),이정희 ( Jung Hee Lee ),태흥식 ( Heung Sik Tae ),이석헌 ( Suk Hun Lee ),이용현 ( Young Hyun Lee ) 한국센서학회 1996 센서학회지 Vol.5 No.5

A 1 ㎛ thick n-type GaAs layer with Si doping density of 1*10^17/㎤ and a 500Å thick undoped single crystalline AlAs layer were subsequently grown by molecular beam epitaxy on the n^+ GaAs substrate. The AlAs/GaAs layer was oxidized in N_2 bubbled H_2O vapor(95℃) ambient at 400℃ for 2 and 3 hours. From the result of XPS analysis, small amounts of As_2O_3, AlAs, and elemental As were found in the samples oxidized up to 2 hours. After 3 hours oxidation, however, various oxides related to As were dissolved and As atoms were diffused 3 hours the oxide surface. The as-grown AlAs/GaAs layer was selectively converted to Al_2O_3/GaAs at the oxidation temperature 400℃ for 3 hours. The oxidation temperature and time is very critical to stop the oxidation at the AlAs/GaAs interface and to form a defect-free surface layer.

세라믹 막 공정에서 학습데이터 기반의 막 여과저항 분률을 활용한 물리세척 공정 최적화

이용수 ( Lee Yong-soo ),김준영 ( Kim Jun Young ),이재원 ( Lee Jae Won ),박성준 ( Park Seongjun ),김영노 ( Kim Youngnoh ),김종오 ( Kim Jong-oh ) 한국물환경학회 2022 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2022 No.-

청소년기 축구선수의 등속성 근력 비교

이용수(Young-Soo Lee),이용진(Yong-Jin Lee) 한국체육과학회 1999 한국체육과학회지 Vol.8 No.1

정적, 동적, PNF 스트레칭이 축구선수의 슬관절 등속성 근력발현에 미치는 영향

이용수(Lee Young-Soo),박종수(Park Jong-Soo),강덕모(Kang Deuk-Mo) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.3

The purpose of this study was to examine the effects of static, dynamic and proprioceptive neuromuscular facilitation(PNF) stretching on the isokinetic muscular strength of knee. Twenty male high school soccer players participated as subjects after signing informed consent forms. The isokinetic knee extension and flexion of each subject were assessed at the speeds of 60, 90, 180 and 240 deg/sec with 5 repetitions at each speed. For the comparative analysis, the changes in the isokinetic strength after static, dynaminc and PNF stretching were compared using the variables such as peak torque(PT), mean torque(MT) and time to reach the peak torque(TRP). The one way repeated measure ANOVA was performed to analyze PT, MT and TRP among three stretching methods(static, dynamic and PNF) and the post-hoc contrast(simple, repeated) test followed, if necessary. The results were as follows: There was no significant difference in peak torque during extension and flexion among the different stretching styles at the angular speed of 60, 90, and 240deg/sec. However, there was a significant difference at the speed of 180 deg/sec during both extension and flexion(p<.05). There was no significant difference in mean torque during extension and flexion among the different stretching styles at the speed of 60, 90, and 240deg/sec but there was a significant difference at the speed of 180deg/sec during flexion(p<.05). There was no significant difference during extension at the speed of 180deg/sec. There was no significant difference in time to reach the peak torque among the different stretching styles at 60, 90, 180, and 240deg/sec of extension and there was a significant difference at the speed of 60, 90, and 180deg/sec during flexion(p<.05). But, there was no significant difference during flexion at the speed of 180deg/sec. According to the results, the proper stretching style that can improve performance of soccer players with minimal loss of muscular strength seems to be combination with PNF and dynamic stretching.

중ㆍ고등학교 축구선수의 무산소성 운동능력과 등속성 최대근력 비교

이용수(Lee Young-Soo),이용진(Lee Yong-Jin) 한국체육과학회 2000 한국체육과학회지 Vol.9 No.2

The purpose of this study was about comparing and analysis of Isokinetic Strength such as Peak Torque, and Peak Power, Mean Power, Power/BW on Wingate test. The subject of this study was comparing soccer athletes between Ⅰ group, 23 athletes(Middle School) and Ⅱ group, 23 athletes(High School). The way of this study was consisted of four parts: 1. On 60°/sec, Obtaining Peak Torque from the repetition and the ROM, 2. Obtaining Peak Power from the Wingate test, 3. Obtaining Mean Power from the Wingate test, 4. Obtaining Power/BW from the Wingate test. The result of this study was also consisted of three parts: 1. Isokinetic Peak Torque was obtainedthe Middle School Soccer athletes 116.6±35.5, 129.0±40.1(Extension)75.1±20.4, 80.3±23.4(Flexion) and High School athletes 180.7±33.7, 188.4±30.4(Extension)114.3±21.3, 115.1±24.7(Flexion) on 60°/sec. He Peak Torque between on the 60°/sec was significant in the Middle and High School Soccer athletes. 2. Peak Power was obtained the Middle School Soccer athletes 443.6±104.5 at Wingate High School Soccer athleteswereobtained638.0±72.89. The PeakPower between on the 30/sec, was significant in the Middle and High School Soccer athletes. 3. Mean Power was obtained the Middle School Soccer athletes 383.3±89.2 at Wingate High School Soccer athleteswereobtained535.5±50.8. The Mean Power was significant in the Middle and High School Soccer athletes. 4. Power/BW was obtained the Middle School Soccer athletes 9.02±1.02(watt/㎏). High School Soccer athleteswereobtained9.92±0.81. The Power/BW was significant in the Middle and High School Soccer athletes. From the result of middle school and high school athletes' peak torques and wingate variablethere was a difference significantly, because there were two different parts such as: the point of view from the body like ages, height and weight, and the term of training. Even though we couldn't see that much about power/bw and isokinetic strength correlation. we should develop performance through either muscle training or muscle endurance training. Therefore, if coaches or staffs choose the way of training like above description, then there will be the development of performance on youth soccer athletes.

연구논문 : 생명과학 ; HepG2 사람 간암세포에서 캅사이신에 의한 아포토시스에 있어서 NADPH 옥시다제-매개로 생성된 활성산소종의 관련성

이용수 ( Yong Soo Lee ),강영신 ( Young Shin Kang ),이지선 ( Ji Seon Lee ),세브달리나 ( Sevdalina Nicolova ),니콜로바,김정애 ( Jung Ae Kim ) 영남대학교 약품개발연구소 2004 영남대학교 약품개발연구소 연구업적집 Vol.14 No.-

체지방율에 따른 최대지방연소 운동강도 비교

이용수(Lee Young-Soo),이상현(Lee Sang-Hyoun) 한국체육과학회 2000 한국체육과학회지 Vol.9 No.1

This study was aimed to compare the maximal fat oxidation exercise intensity(MFOEI) by fat percent and gender and compare heart rate(HR), respiratory exchange ratio(HER), total kilocarolies per minute(Tkcal), and fat kilocarolies per minute(Fkcal) in this exercise intensity. Forty four adult men(normal=33, over fat percent=11) and women(normal=28, over fat percent=23) healthy volunteers served as subjects after signing an informed consent form. The criterion of over fat percent was 25% fat percent and 32%, for men and women, respectively. Following an overnight fast, each subject completed stretching and tree minute warm-up at 2.0mph, followed by a maximal Ramp treadmill test. Expired gases were collected and analyzed each 30 seconds using Cosmed metabolic cart. The MFOEI was defined as the intensity which resulted in maximal Fkcal as determined by converting VO₂ to Fkcal at each treadmill stage using RER and a Lusk table. MFOEI were significantly higher women at compared men, 50.9% and 43.5% respectively(p<.05). However, except for HR, the resultant of t-test for Tkcal, Fkcal and VO₂ were significantly higher men. There was no difference in HER. MFOEI by fat percent was the highest in women obesity group which is the lowest VO₂max and the highest fat percent and the lowest in men normal group which is the highest VO₂nax and the lowest fat percent. This results suggest that MFOEI which prescribe exercise intensity to weight controll is likely to be distinguish from gender, fitness level, and fat percent.

저항운동 방법에 따른 환기량, 에너지소비량 그리고 산소섭취량의 비교

이용수(Lee Young-Soo),이승균(Lee Seung-Kyun),이상호(Lee Sang-Ho) 한국체육과학회 2002 한국체육과학회지 Vol.11 No.1

The purpose of this study was to compare ventilation, energy consumption and oxygen consumption of three resistance exercise methods(1RM-60%, gradual increase and gradual decrease) using flat bench press and to serve resistance exercise program. The subjects were 7 men who were experienced resistance exercise and college students. A repeated measure one-way ANOV A were used to evaluate test results. The results were following like this : 1. Ventilations during resistance exercise according to 3 ways(1RM 60%, gradual increase and - decrease) were not significant meaning of statistic. However, value according to gradual decrease way was high than others. It has a significant difference of .05. 2. Energy consumptions during resistance exercise according to 3 ways(1RM 60%, gradual increase and - decrease) were not significant meaning of statistic. However, value according to gradual decrease way was high than others. 3. Oxygen consumptions during resistance exercise according to 3 ways(1RM 60%, gradual increase and - decrease) were not significant meaning of statistic. However, value according to gradual decrease way was high than others.

청소년기 축구선수의 체격 및 체력 요인별 발달 연구-Ⅰ

이용수(Lee Young-Soo),하민수(Ha Min-Soo) 한국체육과학회 2000 한국체육과학회지 Vol.9 No.1

The purpose of this study was to investigate physique and physical fitness development of young soccer players for providing the valuable data to prescribe the training program. Fifty-four young soccer players(14age group=25; 17age group=29) volunteered to be measured for physique and physical fitness. 1. The growth rate of the physique variables of age 14 and age 17 were as followed, respectively; height(4.0%, 1.8%), body weight(11.3%, 8.3%), %fat(-24.1%, +2.1%), sitting height(4.0%, 1.1%), girth of chest(6.9%, 5.7%), girth of thigh(left(L): 5.5%, 6.0% and right(R): 5.4%, 5.5%), and girth of calf(L: 4.9%, 2.6% and R: 4.9%, 2.7%). 2. The rate of development in the physical fitness variables of age 14 and age 17 were as followed, respectively; 1) Power : Vertical jump(6.1%, 0.5%), Five-bounding jump(5.4%, 5.1%), 25m Hopping(L: 25.4%, 4.6% and R: 22.6%, 3.4%) 2) Agility : Side step test(2.2%, 1.2%) 3) Speed : 50m run(5.8%, 3.4%) 4) Muscular endurance : Sit-up(3.1%, 4.7%) 5) 800m run(3.4%, 4.8%) 6) Maximal oxygen uptake(5.7%, 5.4%) 7) Ventilatory threshold(decreased of 2.8% and increased of 2.2%) 8) Isokinetic strength of knee at 60°/sec(L: extensor(11.7%, 0.7%)/flexor:(21.0%, 3.4%) and (R: extensor(4.8%, 2.2%)/flexor:(5.7%, -7.4%) and 180°/sec(L: extensor(20.1%, 9.5%)/flexor:(20.8%, 5.5%) and (R: extensor(18.4%, 10.1%)/flexor:(13.1%, -2.0%) These results may suggest that physique variables except the girth of thigh, and physical fitness of isokinetic leg strength, and power are increased at age 14 and that the girth of thigh and physical fitness of endurance are increased at age 17 for one year period.

현대 축구의 체력적 요구와 2002 월드컵 대표팀 훈련과정

이용수 ( Lee Young-soo ) 대한운동사협회 2003 대한운동사협회 운동사대회자료집 Vol.2003 No.-

This study was aimed to investigate the physical demands of football players and to provide the information of preparing the Korean National Team for the 2002 world cup. The match analysis indicated that football players run between 9 and 12km during 90 minutes and that the distance covered by players depends on a player's position. At every level of play, attackers sprinted more than defenders and midfielders. This comes because attackers needed to make sprints to get away from their opponent. Football players should carry out not only running but also football specific work, such as sliding tackles and jumping to head the ball. Since the quality of football is associated with the amount of high intensity running performed throughout a game, the importance of speed, explosiveness and quick recovery have been increased. During the preparation for the 2002 world cup, the physical fitness training of Korean National Team was focused to develop the level of the speed & explosiveness and quick recovery which were necessary to support the physically demanding playing style of Korean National Team. The repeated short sprinting and intensive endurance training methods using 7 vs 7 and 4 vs 4 mini game were applied to maximize the speed and explosiveness and quick recovery, respectively. The Yo-Yo intermittent recovery test and the related heart rate data were used to examine a player's ability to recover from intense exercise. Applying sports science can help to obtain a better understanding of the physical demands and training of football players. Also, the knowledge from scientific studies combined with practical experience can provide information for optimal training programs.