형태지수를 이용한 중고령자의 비만판정 기준의 제안

김기학 경북대학교 체육과학연구소 1998 체육과학연구지 Vol.14 No.-

靑少年의 體脂肪率 推定과 肥滿判定 基準作成

金基學 慶北大學校 體育科學硏究所 1992 체육과학연구지 Vol.8 No.-

This study was conducted to estimate the percentage of body fat and to draw up evaluating norms by analizing the tendency of obesity in adolescents. The subjects employed were 2,442 male and female students aged between 12 and 17 years of middle and high schools which are located in medium and small city and big city. Their height, body weight, electrical impedance, and skinfold thickness were measured to calculate body density, and then the percentage of body fat, body fat, lean body mass(LBM), and total body water(TBW) were yield from body density. Validity examination in estimation of % body fat by means of skinfold thickness method was performed through stature indexes such as KI, BMI, RI, and PI which were calculated from height and body weight. The regression equation by independent variables such as body weight, skinfold thickness, height, electrical impedance, and BMI was drawn up to predict body density. Also evaluating norms for obesity by body weight, skinfold thickness, and BMI were drawn up respectively 4 groups;male and female in both middle and high school students. The results obtained are summarized as follows : 1. Percentage of body fat 1) The percentage of body fat by skinfold thickness method was revealed 16.57±3.85% in middle school boys, 20.40±4.97% in middle school girls, 16.41±6.77% in high school boys, and 21.86±4.46% in high school girls. Body density was revealed 1.0610g/㎖, 1.0517g/㎖, 1.0615g/㎖, and 1,0481g/㎖ respectively. In comparision of interregion, percentage of body fat in medium and samll city students was much higher than big city, but showed no difference in middle school and significant difference in high school(p<.001). 2) The percentage of body fat by BI method was 18.58±4.14% in middle school boys, 24.18±5.26% in middle school girls, 16.71±2.97% in high school boys, and 27.41±4.38% in high school girls. And in any case, it revealed higher values than the percentage of body fat obtained by skinfold thickness method. 2. Validity of skinfold thickness method 1) In boys, the correlation between body density and skinfold thickness revealed a significant correlation(p<.001) over all age. In girls, it showed a significant correlation as boys but it was more or less a low value. 2) In correlation among body density by BI method, physique, and stature indices, height and KI index showed no or low correlation, and BMI, RI, and RI index showed high correlation(p<.001) over all age. 3) In correlation between body composition by BI method and that by skinfold thickness method, it revealed high correlation among Db1, %Fat1, Fat1, LBM1, Db2, %Fat2, LBM2, and Fat2 over both male and female in middle and high school students. Therefore, we can interpret that the estimation of %body fat by skinfold caliper method has a sufficient validity. 3. Estimation equation of %body fat Multiple correlation coefficient of estimation equation of %body fat for each subject was about 0.99. The estimation equation was composed by means of skinfold thickness, electrical impedance, and BMI in boy's middle and high school students, and was drawn up from value of electrical impedance and BMI in girl's middle and high school students. Therefore, we can assume a body fat more validly by using above two variables including electrical impedance than by using only skinfold thickness. 4. Evaluation norms for obesity 1) The norms by skinfold thickness method were 33.5㎜ or more in boy's middle school students, 38.0㎜ or more in girl's middle school students, 40.3㎜ or more in boy's high school students, and 40.9㎜ or more in girl's high school students respectively. The ranges of obesity tendency were 26.4-below 33.5㎜, 32.0-below 38.0㎜, 33.7-below 40.3㎜, and 35.0-below 40.9㎜ respectively. 2) The norms by body weight were 68.5㎏ or more in boy's middle school students, 65.4㎏ or more in girl's middle school students, 76.7㎏ or more in boy's high school students, and 67.3㎏ or more in girl's high school students respectively. 3) The norms by BMI were 25.9 or more in boy's middle school students, 26.3 or more in girl's middle school students, 26.1 or more in boy's high school students, and 27.1 or more in girl's high school students respectively. The ranges of obesity tendency were 22.9-below 25.9, 23.3-below 26.3, 23.5-below 26.1, and 24.2-below 27.1 respectively.

基礎的인 體育統計의 方法

金基學 慶北大學校 師範大學 體育學硏究會 1975 體育學會誌 Vol.1 No.-

男子 大學生의 體力 Test Battery에 關한 硏究

金基學 慶北大學校 1990 論文集 Vol.49 No.-

The purpose of this study was to develope a test battery and evaluation scales for measuring the physical fitness of male college students. 125 male college students, aged 18 to 20, participated as subjects and were administered 20 test items. After the test, estimation equation of factors and evaluation scales for both factor and ability were devised by extraction and interpretation of the factors through factor analysis. The conclusions obtained from this study were as follows: 1. Physical fitness of male college students were composed of 8 factors including explosive strength, speed of changing direction, speed of movement completion, static strength, static balance, static flexibility, muscular endurance, and cardiorespiratory endurance. 2. To measure the interpreted factor, an estimation equation of factors made of standard score was determind, and, by inserting the statistics(mean and standard deviation) of each variable, it was translated into an equation which calculate factor score by using of raw score. 3. A test battery was developed in considering factor loading, reliability, validity, and practicability for each factor. Test items included in the test battery were vertical jump, boomerang run, completion time(back), grip strength, squat thrust, stork stand, trunk extension, and 1500m fast walk. 4. Evaluation scales with 5 grades for both factor and ability were developed to evaluate the test battrry. 5. To develope an estimation scale for ability, mean and standard deviation for each 8 item was divided into 11 grades(from 0 to 10) by C-scale. A perfect score for the test was 80 points. The total score was obtained by applying the raw scores of individuals to this score table. On the basis of the statistics of the obtained total score, the evaluation scale with 5 grades(A,B,C,D, and E) was devised to interpret test scores. ◁표 삽입▷(원문을 참조하세요)

劍道競技의 有效打擊部別 實態에 關한 調査 分析 : 水準別, 身長別 According to the Height and Level

金基學 慶北大學校 師範大學 1976 敎育硏究誌 Vol.18 No.-

With the object of 156 highschool boys and 196 students, total 352, analysing and researching on the fatal striking part in Kumdo according to the level and height, the result is as followes: 1. The fatal striking part in the group of highschool. 1) In case of players of tall stature (who are the taller of the two players) and players of short stature (who are the shorter of the two players), men in similiar stature, the attack of head is considered as the most fatal striking part. In respect of an effect there is no difference between the wrist attack and the waist attack. 2) Being master of the skills in the wrist attack and waist attack and stabbing is required. 2. The fatal striking part in the group of colleger. 1) In case of player of tall stature and short stature, player in similiar stature, the attack of head and wrist is considered as the most fatal striking part, but there is hardly difference between them. 2) Being master of the skills in the waist attack and stabbing attack is required. 3. General tendency and actual condition in the fatal striking part. 1) In case of player of tall stature The attack on head is proved as the most fatal striking part, and the wrist attack and waist attack is considered as the next fatal striking part. 2) In case of player of short stature. The wrist attack and head attack is proved as the most fatal striking part, and there is harcly difference between them. 3) In case of player of similiar stature. The attack should not be partial only to the front head, but the master of skills in attack to right and left side of head, the analysis and development of skills in the waist attack and stabbing attack is required.

아톰안테나 - 원자력 유전자, 그리고 인류의 미래

김기학,Kim, Gi-Hak 한국원자력산업회의 2010 원자력산업 Vol.30 No.4

Infeed Control Algorithm of Sorting System Using Modified Trapezoidal Velocity Profiles

김기학,최용훈,정훈 한국전자통신연구원 2015 ETRI Journal Vol.37 No.2

This paper applies acceleration/deceleration control–based velocity profiles to an infeed control algorithm for a cross-belt-type sorting system to improve the accuracy and performance of the system’s infeed. The velocity profiles are of a trapezoidal shape and often have to be modified to ensure that parcels correctly synchronize with their intended carriers. Under the proposed method, an infeed line can handle up to 5,600 items/h, which indicates a 40% increase in performance in comparison with its existing handling rate of 4,000 items/h. This improvement in performance may lead to a reduction in the number of infeed lines required in a sorting system. The proposed infeed control algorithm is applied to a cross-belt-type sorting system (model name: SCS 1500) manufactured by Vanderlande Industries.

體格이 윗몸 앞으로 굽히기 能力에 미치는 影響

金基學,金享烈 慶北大學校 師範大學 體育學硏究會 1978 體育學會誌 Vol.4 No.-

單純反應時間에 關한 調査分析(Ⅰ) : 빛에 對한 反應時間을 中心으로 Emphasizing on the Reaction Time to the Light

金基學 慶北大學校 師範大學 1978 敎育硏究誌 Vol.20 No.-

This study is aimed at investigating and analyzing the general trends of S.R.T. to the light, taking 133 students from the College of Physical Education including 52 male and 30 female students and 51 athletes as the subjects of this study, and using the KYS Type Reaction Time Measuring Equipment-a Motor Aptitude Test Equipment. The findings are as follews: 1. It took for athletes by an average of 0.1798 seconds recording the shortest among them all, which are followed by 0.1972 seconds and 0.1989 seconds, respectively, and of whose simple reaction time, in common, lies in the range of general light. 2. Identifying the trends by the types of sports: athletics players marked the shortest time by an average of 0.1542 seconds, followed by in order, 0.1780 seconds for Handball; 0.1822 seconds for Basketball; 0.1826 seconds for Volleyball; 0.1849 seconds for Hockey; 0.1878 seconds for Soccer; and 0.1972 seconds for Tennis. It was also found as a result of t-test that there is a difference between the athletics players and other types of sports, but not any difference among the latters in terms of simple reaction time. 3. Among the athletics players, sprinter marked 0.137 seconds and 0.159 seconds for the long-distance racers, and besides the medium-distance racer, it was nearly coincided with the information presented in the literatures. And the jumpers recorded 0.142 seconds and 0.166 seconds for the hurdlers.

運動能力의 因子分析的 硏究의 史的 考察

金基學 慶北大學校 體育科學硏究所 1989 체육과학연구지 Vol.5 No.-

Many studies have been done employing factor analysis,since McCloy, C. H. extracted three factors, i. e. strength, velocity, and coordination, by applying multiple factor solution to motor capacity test battery in 1934. The investigations, studied from the 1930's to 1984, were examined in this study, with the classification of 1) factor solution applied to the factor analysis studies of the motor ability, 2) extracted factors, 3) periodical characteristics, and 4) sex differences. 112 studies were referred, and they could be summarized as follows. The studies discussing the structures of the motor ability in the factor analytic points of view, can be divided into three models, i. e. applying (1) multiple factors, (2) general factors and group factors, and (3) hierarchical factors. Most of the investigations published in America, applied multiple factor model, and Highmore, an Englishman, employed a model applyihg general factors and group factors. However, Matsuura, Inoue, and Nakamura et al., Japanese, suggested a structure of muscular strength and motor ability employing hierarchical factor model. The current trend in the studies on the factor structure of motor ability is to validate the validity and objectivity of the factors and induce a conclusion about factor structures by exrtacting a Robust factor. The Robust factor is extracted in the examination of the rotated factor pattern matrix obtained by several solutions. The solutions commonly applied are Principal component analysis, Principal factor solution, Image factor solution, Canonical factor solution, Alpha factor solution, Maximum likelihood factor solution, etc.. Considering the extracted factors in the domains of strength, agility, coordination, balance, flexibility, endurance, and physique, the factor on the muscular strength was induced most frequently, which suggests that the muscular strength be the most important factor in the motor ability and physical fitness. In addition, muscular strength domain was divided into static, dynamic and explosive strength, and muscular endurance, and induced again as various differentiated factor. With regards to periodical characteristics, the factor analysis studies of the motor ability, begun in the 1930's, have been continued to the 1980's, and the application ranges have been changed from the investigations of the overall motor abilities to the examinations of the individual factors. The investigations on the sex differences of motor ability have been progressed from the comparative studies of fitness for performance to the examination of the sex differences of the factor structures. This part, in particular, escaped from simple comparative studies of the factor structures, have a tendency of applying a comparative study method based on communality of factor pattern matrix, factor similarity, correspondence to the hypothesized factor, simpleness of the factor interpretation, simple structures of the factors, etc..