투명전극을 이용한 광전소자

김준동,Kim, Jun-Dong 한국전기전자재료학회 2015 전기전자재료 Vol.28 No.9

태양전지 기술 및 개발 현황

김준동,Kim, Jun-Dong 한국전기전자재료학회 2015 전기전자재료 Vol.28 No.3

노인의 일상생활 중 보행수가 발꿈치 뼈 강도 및 하퇴근 면적에 미치는 영향

김준동(Kim Jun-Dong) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4

The purpose of the this study was to investigate the effects of Walking steps rate during everyday on muscle mass of the crus and the bone powerfulness of the calcaneus in the elderly people. As test subjects, 35 males and 52 females at the age ranging from 62 to 79 were used. The cross-sectional area(CSA) of tibialis anterior and trioeps surae was measured in the subjects using magnetic resonance imaging(MRI). Walking steps during daily life was measured using life-recorder. The osteo sono-assessment index of calcaneus were determined using ultrasound parameter. In females, a significant co-relationship was observed between the osteo sono-assessment index and walking steps rate(r=267, p<.05), and weight load index(r=374, p<.05). These results indicate that walking exercise was necessary higher intensity for bone mineral density of the crus than increasing the number of walking steps during everyday in female.

중ㆍ고령자를 대상으로 실시한 상ㆍ하지 피하지방층과 근육량의 비교검토

김준동(Kim, Jun-dong),권정현(Kwon, Jeong-Hyun) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.6

The object of this study is to compare and review the upper and lower limbs subcutaneous fat layer and muscle quantity targeting the middle and old age people. The subjects are 138 women age from 50 to 83 and the subject groups were divided into 6 groups and the subcutaneous fat thickness and muscle quantity of the upper and lower limbs were measured using the B-mode ultrasound. As a result, the thickness of the subcutaneous fat of biceps brachii, thigh muscle, and leg muscle of the group age 55-59 all increased compared to the group age 50-54(p<.01). Meanwhile, in case of muscle thickness, the thickness of rectus femoris rather than biceps brachii significantly reduced in the group age 55-59(p<.05). This study showed the result that the subcutaneous fat layer increased and the muscle quantity decreased following the age increase, and especially the muscle quantity reduction of the lower limbs(the front thigh) was more remarkable than the upper limbs. The result of this study suggests that it is possible to measure the subcutaneous fat layer and muscle quantity by the simple supersonic method without using CT or MRI targeting the person and it is necessary to reinforce the lower limb-muscular strength training for the aged.

일본유치원생을 대상으로 실시한 운동능력과 체격 및 신체조성의 관계에 대한 검토

김준동(Kim, Jun-Dong) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.3

This study examined the relationship between body composition and physical strength/motor ability in children to obtain basic data on the imbalance between physique and physical development in children in recent years, as well as the relationship between obesity and physical strength. Especially, The subjects were 97 boys and 92 girls at a nursery school in Gifu Prefecture, Japan. The items measured for physique and body composition were height, weight, BMI, muscle mass, body fat percentage, and amount of body fat. Bone density was calculated from speed of sound (SOS) and soteo-sono assessment index (OSI) from ultrasound propagation velocity and transmission index. The items measured for motor performance were 20 m dash, standing long jump, tennis ball throw, repetitive sideways jump, one-legged jump, and chin-ups. A partial correlation analysis of physique/body composition and physical strength/motor ability was conducted, but no notable correlation was found between body composition and physical strength/motor ability. From this it is conjectured that physique and body co mposition have little effect on physical strength and motor ability in early childhood. Therefore, because congenitally determined factors are strong in the attainment of physical growth and development in early childhood, the inference of body composition for physical strength and motor ability is assumed to be small in early childhood.

훌라후프운동과 식이요법이 성인비만여성의 신체구성과 체력에 미치는 영향

김준동(Jun Dong Kim),예소란(So Ran Ye),김태규(Tae Kyu Kim),정기연(Ki Yuen Jung),선우섭(Sub Sunoo) 한국발육발달학회 2006 한국발육발달학회지 Vol.14 No.3

The purpose of this study was to compare of the energy expenditure of two different types of hula-hoop exercise and the effects of hula-hoop exercise and diet cure for 6 weeks on body composition and physical fitness of obese women. The subject were 21 obese women(Experimental group: 14 for hula-hoop exercise and diet cure/Control group: 7 for diet cure only) who aged 23-47yrs with 33% of body fat rate. Measured body composition variables included weight, %fat, lean body mass, skinfold-thickness, body circumference and related physical fitness variables included. The results showed that superior iliac spine subcutaneous fat bifold, abdominal subcutaneous fat bifold and waist line of experimental group decreased compare to the control group. And experimental group performed better in sit up repetition. More over comparing the energy expenditure between two exercise types. The energy expenditure of Type B(waist, lower limb movement and arm movement) is significantly higher than Type A(waist, lower limb movement). Exercising depends on the time and the effort that is put into the routines. The amount of energy needed to do hula-hoop is equivalent to the energy needed to jump rope based on the research, therefore it can be concluded that this type of exercise requires a lot of energy. Hence, these data indicate that affirmative effect to the obesity solution where the hula-hoop motion is caused with motion insufficiency or hypernutrition. Especially, hula-hoop exercise denotes that it is effective in decreasing the abdomen and the waist fat.

중·고령여성의 생활 체력과 요부 및 하지근 횡단면적의 관계

김준동(Jun Dong Kim),정미송(Mi Song Jung) 한국발육발달학회 2008 한국발육발달학회지 Vol.16 No.1

The purpose of this study was to investigate the relationship between daily living functional fitness and muscle mass in the lower limbs and waist in mid-elderly women. The subject of the study consisted of 57 persons (females) aged 50-79 years older. The subcutaneous fat and muscle psoas major cross-sectional area measurements were determined with an MRI machine. As for the femoral cross-sectional area, quadriceps femoris muscles were classified under thigh muscle extensors and hamstring muscles as well as adductor muscles under thigh muscle flexsors. The lower limb muscles involved muscle tibialis anterior and muscles triceps surae both of which had their cross-sectional area calculated. Also, the functional fitness tests included sit-ups, chair stand up, sitting trunk flexion, close-eyes foot-balance, 10m obstacle walk and 6-minute walk. The results of the present study were as follows: the ability of daily living functional fitness showed a statistically significant decrease in value from the 70`s age group when compared with the 50-59 age bracket (sit-ups, chair stand up, close-eyes foot-balance, 10 m obstacle walk and 6-minute walk: p<.01), but the sitting trunk flexion of daily living functional fitness showed no significant change for aging. Also the muscle cross-sectional area showed significantly decrease from the 70`s age group when compared with the 50-59 age bracket (muscle psoas major, thigh muscle extensors, tibialis anterior, triceps surae: p<0.01). The significant co-relationship was found between the sit-ups (r=.665)/chair stand up (r=.557)/sitting trunk flexion (r=.542)/close-eyes foot-balance (r=.418)/6-minute walk (r=.669) and psoas major in the 60-69 age bracket, also between muscle psoas major (r=.694)/thigh muscle extensor (r=.485) and 6- minute walk in the 70-79 age bracket. These results indicate that the muscle atrophy with aging in tibialis anterior, triceps surae, muscle psoas major and thigh muscle extensor is a factor responsible for the decreases in daily living functional fitness(et`s. walking ability). Furthermore, it was suggested possibility that the decline of daily living functional fitness is due to decreased muscle mass of the lower limbs and waist with aging.

하지근과 등속성 근력 및 슬관절 파워의 연령차 비교분석

김준동(Kim, Jun-dong) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.3

This study evaluated the muscle mass of legs and simultaneously measured the isokinetic muscular strength and knee extension power targeting 99 women from 50 to 80 in order to review the relevancy with the muscle mass and to provide the basic data about the importance of the muscle of legs and for writing a exercise program. For the measurement of muscle strength of hip joints, an isokinetic dynamometer was used, and dynamic extension (60, deg/s) and dynamic flexion were performed. For the measurement of knee extension power, leg extension power measuring device was used. There was a significant correlation between psoas major muscle, muscle cross-sectional area, and hip joint flexor in the age group of 55-59 (r=.649, p<.05). In addition, There was a significant correlation between the extensor group, and knee extension power in the age group of 60-64 (r=.688, p<.01), 65-69 (r=.629, p<.01), 70-74 (r=.609, p<.001), and 75-80 (r=.773, p<.01). Meanwhile, There was a significant correlation between extensor muscles and knee extension power in the age group of 55-59 (r=.608, p<.05), 60-64 (r=.585, p<.05), 65-69 (r=.597, p<.01). The findings as above imply the muscle of legs is likely to influence knee extension power, the flexion of hip joints, knee extension power, and knee flexion greatly for the middle aged and the aged. Thus, the studies on the exercise programs to increase the muscle of legs are required.

중 · 고령자의 신체구성 및 생활 체력의 변화

김준동(Kim, Jun-Dong) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1

In this study, the way to assess muscle more accurately, was considered among the measurement methods of body composition. The purpose of the study is to measure the thickness of rectus femoris and vastus lateralis by using ultrasound measurement, lower-limb muscular power according to the aging process, bone density and the changes of sit-to-stand(STS) performance of middle-aged and elderly subjects. Subjects were 187 males and females age of 50 to 86 years, for comparison subjects were divided into groups of 50-54 years, 55-59 years, 60-64 years, 65-69 years, 70-74 years, and 75 years or more. As a result, degradation of performance occurred in all measurement items according to aging process(p<.05-p<.001), however the degree of the degradation of women was higher than men. Men subjects did not show a significant reduction in the thickness of rectus femoris and the bone density. The reason is estimated that the level of daily physical activity(actions such as walk or climb stairs) was higher than women subjects, physiological changes due to a decrease in physical activity and female hormones are considered to be the main cause in older women. Therefore, it is considered to focus more on the development and dissemination of sports programs for women in the future.

고령여성의 요부 및 하지 근육량이 계단 상ㆍ하 보행속도에 미치는 영향

김준동(Kim Jun-Dong),정미송(Jung Mi-Song) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.1

The purpose of this study was to investigate the relationship between up and downward walking pace on the stairs and muscle mass in the lower limbs and waist in elderly women. The subject of the study was comprised of 92 elderly women aged between 60 to 75 and their up and downward walking pace on the stairs (each step being 27.5cm wide, 132cm long and 19cm high) was measured using a stopwatch. The sacrossoinalis, rectus abdominis and muscle psoas major cross-sectional area measurements were determined with an MRI machine. As for the femoral cross-sectional area, quadriceps femoris muscles were classified under thigh muscle extensors and hamstring muscles as well as adductor muscles under thigh muscle flexsors. The lower limb muscles involved m. tibialis and m. triceps surae both of which had their cross-sectional area calculated. The results of the study were 1. The group that had a fast walking pace on the stairs exhibited considerably high figures in the cross-sectional areas of the muscle psoas major, femoral thigh muscles compared with the group of slow walking pace. 2. The fast group exhibited considerably high figures than the slow group in terms of the cross-sectional areas of sacrossoinalis upon downward walking. 3. There were no significant mutual relationship between the cross-sectional areas of the rectus abdominis, m. tibialis anterior and m. triceps surae and walking on the stairs. As a conclusion there is a remarkable connection between the sacrossoinalis, muscle psoas major and thigh muscles mass and walking pace on the stairs; hence it could be suggested that the maintenance as well as increase of their muscles mass have a potential to improve their ability in walking up and downward the stairs.