UV 폴링용 Ge와 B가 첨가된 실리카 유리 광섬유 제조 및 특성 평가

김복현,안태정,허종,신동욱,한원택,Kim, Bok-Hyeon,Ahn, Tae-Jun,Heo, Jong,Shin, Dong-Wook,Han, Won-Taek 한국세라믹학회 2002 한국세라믹학회지 Vol.39 No.12

2차 비선형 광특성을 유도하기 위한 UV 폴링용 Ge와 B가 첨가된 광민감성 광섬유를 제조하였다. 248 nm KrF 엑시머 레이저 조사에 의하여 수소처리 없이 장주기 격자를 형성할 수 있었다. 116 mJ/$cm^2$의 펄스 에너지와 10 Hz의 조사 빈도로 1분간 광민감성 광섬유에 레이저를 조사할 경우 -4 dB의 큰 band rejection 특성을 얻을 수 있었다. 제조된 광섬유의 광민감성은 장주기 격자쌍 방법을 이용하여 측정하였으며, 8.67 kJ/$cm^2$의 fluence로 KrF 엑시머 레이저를 조사할 경우 3.3${\times}10^{-3}$의 큰 코어 굴절률 변화를 얻었다. 또한 UV 폴링 시에 광섬유 코어에 고전압을 쉽게 인가할 수 있는 H자 형상의 광섬유를 인출조건의 최적호를 통하여 제조하였다. An Ge/B-doped optical fiber with high photosensitivity was fabricated to induce large second-order optical nonlinearity by UV poling. It was found that long period fiber gratings were inscribed on the fiber by the 248 nm KrF excimer laser irradiation with pulse energy of 116 mJ/$cm^2$ and pulse frequency of 10 Hz without hydrogen loading treatment. The photosensitivity was measured by use of the long period fiber grating pair method and the refractive index change of 3.3$10{\times}^{-3}$ was found to be induced in the core of the optical fiber by the KrF excimer laser irradiation of 8.67 kJ/$cm^2$. An H-shaped optical fiber was also fabricated for the UV poling through optimization of the fiber drawing condition.

좌담회 - 대학인이 보는 환경오염문제

안기희,오세창,신진명,장상호,최미영,고화석,황영진,김복현,Ahn, Ki-Hee,Oh, Se-Chang,Sin, Jin-Myeong,Jang, Sang-Ho,Choe, Mi-Yeong,Go, Hwa-Seok,Hwang, Yeong-Jin,Kim, Bok-Hyeon 환경보전협회 1988 환경정보 Vol.10 No.14

폐경 후 비만여성에 대한 감량프로그램이 골량 및 골밀도에 미치는 영향

노호성 ( Ho Sung Nho ),김형돈 ( Hyung Don Kim ),김복현 ( Bok Hyeon Kim ) 한국운동영양학회 2005 Physical Activity and Nutrition (Phys Act Nutr) Vol.9 No.2

대학 알파인 스키선수와 일반 대학생의 슬관절 등속성 근기능 발달 특성 비교 연구

이진원(Lee Jin-Won),오세진(Oh Se-Jin),김복현(Kim Bok-Hyeon),박찬호(Park Chan-Ho) 한국체육과학회 2002 한국체육과학회지 Vol.11 No.2

The purpose of this study was to compare isokinetic knee joint muscle strength between university alpine skiing players and general university students and to offer foundamental information on characteristics of thigh muscle strength. for university alpine skiing players and effective training method for general university students. The subjects of this study were 10 university alpine skiing players and 10 general university students. Also, the experimental instruments used were Martin' s anthropometer(PKS-100, Japan), and isokinetic equipment(CYBEX NORM, USA). To analyze the data, the statistical method used in this study were mean, standard deviation, and t-test using SPSS for Windows(Version 10.0.7). Based on aforementioned research method, the results of this study are as follows. 1. The left and right protractor of uniform nature knee joint and maximum muscular strength in niversity alpine skiing players group was notably high(p<.01), and there was little difference in relative value per weight. 2. The average power of the left and right protractor and the uniform nature knee joint of flexor of niversity alpine skiing players group at 60 degrees per second was notably high (p<.01). However, though the average power of the left and right of protractor and the right of flexor was notably high at 180 deg per second (p<.05) there was little difference in the left flexor. In average power, elite group was higher than college club group. Especially, right extension(p<.05) and right flexion(p<.01) were significant high in 240° /sec. 3. The uniform nature left and right of protractor and muscular stamina extension knee joint in niversity alpine skiing players group was notably high (p<.05), but there was little diffrence between groups in muscular stamina of the left and right flexor. On the muscle endurance ratio, there was no significant difference. 4. In peak torque for flexion/extension, there was no significant difference between university alpine skiing players group and general university students group.

야구선수의 주관절 내측측부 인대 재건술 후 재활운동의 사례 연구

이병국(Lee Byung-Kook),임승길(Lim Seung-Kil),한경진(Han Kyung-Jin),김복현(Kim Bok-Hyeon),노호성(Nho Ho-Sung),김정주(Kim Jung-Ju) 한국체육과학회 2006 한국체육과학회지 Vol.15 No.1

Ulnar collateral ligament (UCL) injuries of the elbow in throwing athletes are part of a spectrum of valgus extension overload injuries. After the operation of ulnar collateral ligament in case of two amateur baseball pitchers: K and S. They were trained by rehabilitation program with 4 phases for 26 weeks. Decrease of inflammation and ROM (range of motion) had been progressed by 1 phase as immediate post-operation. Also, 2 phase as an intermediate phase had improved gradually strength and increased ROM 3 phase as an advanced strengthening phase had initiated improvement of power, endurance and plyometric exercise. 4 phase as a return to activity phase progressed functional exercise and interval throwing program (ITP) with 4 grade. During the rehabilitation, K player has mild pain but, symptom such as inflammation did not show and return after ITP 40 m. On the other hand, S player did not easily recover owing to inflammation sign during rehabilitation. Returning continue rehabilitation exercise program progress, rehabilitation exercise program has been performed. As a result, S plyer can throw balls with more than 140 ㎞/h professional baseball and enter the club. However, K player could not perform rehabilitation exercise program because of team problems.

대도시 청소년 체격의 발육발달과 표준체중에 관한 연구

김성만,손흥기,김복현 경희대학교 체육과학연구소 1995 體育學論文集 Vol.23 No.-

The Purpose of this study is to analyzing the developing process of physique during the 12 years regression equation standard body weight according to the age and body height and also we analyzed the distribution status of normal body weight and obesity weight in 17-year old high school students. A total of 1,423 samples(male:723, female: 701, born between March 1, 1977∼February 28, 1978) and the students who were randomly selected in big city of north of Jeola province, The result of our analysis are as follows: 1.Measurement of Physique ①The steady growth showen 14 year of male and 12-year of female in body height, 14-year of male and 13-year of female In body weight, 15-year of male and 13-year of female In chest-girth, since then the growth and development linear curve is more showness. ②During the 12year of school age, the rate of growth were 55.12cm(47.4%) of male 44.80cm(38.9%) of female in body height 43.59(214.5%) of male, 35.20kg(180.8%) female in body weight and 3.83cm (55.48%) of male, 28.11cm(50.70%) of female in chest girth. ③The age of maximum rapids growth were 12∼13 years old(7.36 ± 2.52cm) of male 10∼ 11years old (6.81± 1.88cm) of female In body height, 12∼13years old(6.14±3.37kg) of male, 11∼12 years old(5.49±2.67kg) in body weight and the chest-girth were 13∼14years old(4.34± 3.20cm) in male, 11∼12 years old(5.01 ± 3.80cm) in female. ④The age of cross over between male and female were 9.7∼ 11.7 years old in body height, 11.5∼ 13.5 years old in chest-girth and there is on cross over in body weight. ⑤The body height of 17-year old was 171.68∼5.56cm in mate and 159.92±4.85cm in female, body weight was 63.91±8.89kg in male and 54.67±6.74kg in female and the chest-girth was 89.20±5.94cm in male 83.55 ± 5.27cm in female. ⑥Physical growth and development was more remarkable improvement than 1980' Physique especially the age of adolescence. 2.Standard body weight by regression equation ①Correlation coefficient of r=0.469-0.760 between body height and body weight in male and r=0.347-0.793 in female. ②Regression equation of standard body weight were found in 17-year old and the equation were y =0.749X+64.791 in male, y=0.484X+22.800 in female. ③The distribution of normal body weight were 63.1% in male and 76.2% in female, over weight were 10.4% in male and 9.3% in female and the obesity weight were 6.9% in male and 3.4% in female.

運動强度에 따른 白血球의 變化에 대한 硏究

김복현,유승희 경희대학교 체육과학연구소 1997 體育學論文集 Vol.25 No.-

The purpose of this study was to estimate change of leukocyte subsets on the increased maximal exercise load during the time of exercise intensity and after all-out and recovery. On a sample of 14 male collegiate students they were subdivided into two group(7 athletes group, 7 normal students group). Number of leukocytes increased from rest through All-out exercise intensity and decreased at recovery. Resting levels were again reached after 60 mins of recovery. There were no significant differences between groups. The rate of increase was significantly higher(p<.01) for the athlete group during 40%, 60%, 80%and All-out and exercise intensities. Percent of neutrophils decreased for both groups until All-out time, but the absolute number of neutrophils increased at each level of exercise intensity and reached maximum level during All-out time. There were no statistically significant differeneces between two groups for the percent and absolute number of neutrophils. The rate of increase was significantly higer (p<.05) for the athlete group at 80% exercise intensity. Percent and absolute number of lymphocytes increased from rest to All-out time but decreased at recovery. Although there was no difference for the rate of increase between the two groups, absolute number of lymphocytes was significantly higher(p<.05) for the athlete group from 40% to All-out exercise intensity. Based on those results mentioned above, the follwing conclusion can be reach: Absolute number and percent of leukocyte subsets changes during graded maximal exercise. Specifically absolute number of leukocyte subsets increased from rest to all-out exercise.

한국과 러시아(구소련) 마라톤 선수들의 스포츠 성과에 관한 비교 분석

김익겸,이종희,김복현 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-

According to the result of sport achievement of Korean and Russian marathoners(Soviet Union) through regression analysis, it can be concluded following this: 1.Korean marathoners have more good result than Russian marathoners, and Success of Korea marathon is classified by three stages First, in 1930's under Japanese colony Korea marathon had succeeded in LA Olympics(1932) and Berlin Olympics(1936). Second, From 1947 to 1957 Korean marathon had succeeded in commercial marathon race. Third, In 1990's the succession of Barcelona(1992) and Atlanta(1996) Olympics and succession of Asian Games(1990,1994,1998). 2.The succession of Russian marathon is classified by two stages. First, from 1946 to 1962 and 1978, the succession of European Championship. Second, the succession of Moscow Olympics.

한국 엘리트 마라톤 선수들의 기질 특성에 관한 연구

김익겸,유승희,김복현 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-

According to the research of Korean marathoners of Psychological characteristic, it can be conclusion follow this: 1.Korean marathoners have ambivert characteristic that it appears both extrovert and introvert as well as in the middle of both characteristic. 2.Look at the low of neuropsychiatric tendency, Korean marathoners are not easily shaken by emotion. 3.According to the temperament, most of marathoners belong to choleric temperament and sanguine temperament, and it can find good marathoners is located on the border of others temperament. According to the psychological Index of Korean marathoners, in order to develope high work ability in marathon, it recovers that extreme characteristic is not advisable whether extrovert and introvert or neuropsychiatric tendency index and temperament.

남자 초등학생의 신체부위별 체지방 분포도에 따른 신체구성 및 체력에 관한 연구

김복현 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-

This study investigated body composition, physical fitness of classified by fat distribution of 258 male elementary school students attending the elementary school in Kwangju city. The result of the study were as follows; 1.In factor of percent fat, fat mass, fat-free mass, basal metabolic rate, total body water, body mass index appeared Gynoid group average the highest in three groups. 2.In factor of plate tapping, sit and reach, and standing broad jump appeared Androgeny group average and grip strength, bent arm hang and endurance run appered Normal group average and flamingo balance and shuttle run 50m appeared Gynoid group average the highest in three groups. 3.The correlation coefficient between grip strength and fat free mass, basal metabolic rate, total body water revealed as the highest correlation in Gynoid group.