한국무용 뛰기동작의 충격력에 대한 연구

배영상,강정순 啓明大學校 生活科學硏究所 1997 科學論集 Vol.23 No.-

AbstractThe purpose of this study was examined the mechanical variations focusing on the jump for one foot landing an the jump for both feet landing in basic skills of the Korean dance, in order to reveal the reason of the knee and feet joint injury of the dancer. Subjects were 10 skilled and 10 unskilled. They jumped over the Force Plateform was used to examine the ground reaction force in jumping and landing. The following conclusions are supported by the findings of this study. In jumping for the both-feet and one-foot landing of skilled, the jump of the one-foot landing is significantly(p<.01) longer in the duration of take off and more lower in the height of jump than the jump for the both-feeg. The duration of take off for the both-feet and one-foot landing of skilled is almost same between both but in the duration of landing situation is significantly(p<.01) longer the one-foot landing. The both-feet landing is regardly (p<. 05) larger in the average force and power of landing situation. There are not the significant difference between the jump of the both-feet and one-foot landing in the duration of take off, the height of jump and the average force and power, which are appeared in the jump of unskilled. The both-feet landing is significantly bigger in the average power of landing situation in the both-feet and one-foot landing of unskilled.

바운스드롭점프에 있어 下肢關節의 力學的 일量

裵永相,裵正幸,徐彰翊,金甲求,朴晟秀 啓明大學校 生活科學硏究所 1996 科學論集 Vol.22 No.-

The purpose of this study was to investigate jumping ability in order to establish proper methods of strength and power training for jumping as pertains to sports. Jumping in sports requires higher jumping in a short amount of time. Eight skilled female modern dancers were instructed to drop jump onto a force platform with both legs from four different heights(15,30,45,60cm). They were filmed from the side with a high speed camera (100fps). The power developed at the ankle, the knee and hip joints was computed by multiplying the moment of force by the joint angular velocity. Mechanical energy was absorbed by the eccentric contraction of the ankle and knee joint muscles during phase of downward movement. Mechanical energy absorption rate by eccentric contraction related to the knee joint muscle at high load intensity was relativly higher than low load intensity. It required the energy absorption by the eccentric contraction of knee joint muscles in order to reduce take off time in phase of downward movement. In push off phase, it projected the body into the air by the concentric contraction of ankle and knee joint muscles.

Counter-Movement Drop Jumping에 있어 落下높이의 影響

裵永相,裵正幸 啓明大學校 生活科學硏究所 1995 科學論集 Vol.21 No.-

The purpose of this study was to examin changes in mechanical power generation at each joint of lower limb during the counter-movement drop jumping at different heights. Eight skilled female dancers were instructed so as to drop jumping on a force platform with their both legs at four different heights (15, 30, 45, 60cm). They were filmed from side with a high speed camera (100fps). The power developed at the ankle, the knee and the hip joint were computed by taking the product of moment of force and joint angular velocity. The mechanical power generated at the knee joint during the counter-movement drop jumping was somewhat larger than that at the ankle and hip joint. The knee extensors and the ankle plantarflexors were the dominant muscle grop during the downward and push-off phase of drop jumping. And the hip extensors were the dominant muscle grop from 10% of the elapsed time to 90% of that. The mechanical work of the hip extensors was observed to increase with dropping height, and the highest mechanical work of hip extensors was found during dropping height of 0.60m. The energy which was produced by a concentric contraction of the knee extensors and the ankle plantarflexors during the push-off phase of the drop jumping was used to extend the ankle and knee and to drive the body upward for the high jump.

고령자 달리기 동작의 역학적 분석

배영상,박건식 啓明大學校 生活科學硏究所 1997 科學論集 Vol.23 No.-

<Abstract> The purpose of this study was to investigate the kinematic variable of running motion of aged man in order to the suggestion of important information on a mechanism related to the decrease of physical performance in aged men. The subjects were consisted of 60 -aged men, and the motion of jogging and sprinting were measured using a high speed movie camera. The stride frequency of sprinting (2.81∼2.92) steps/s) showed a higher values (16%) than jogging, and the stride length of sprinting(1.25∼1.33m) showed a higher values(32.5%) than jogging, and the velocity of sprinting (4.24∼4.33m) showed a higher values(54.13%) than jogging. The differences of segment of angle and angle of ankle joint between jogging and sprinting showed 1°∼5°, respectively. There were showed th over-up of toe at foot strike and the hypo-extension of ankle joint at toe-off during the motion of foot. The differences of segment of angle and angle of knee joint between jogging and sprinting showed 1°∼5°, respectively. There were showed the hypo-extension on foot strike and the hypo-extension on toe-off during the motion of knee joint. The differences of segment of angle and angle of hip joint between jogging and sprinting showed 1°∼9°, respectively. There were showed the poor-up of knee at foot strike and the hypo-extension of hip joint at toe-off.

PROLOG의 변수 특성에 관하여

정채영,배상현 조선대학교 기초과학연구소 1989 自然科學硏究 Vol.12 No.1

This paper introduces twonew language concepts: freezing andmelting of variables in terms. Accordingly, system predicats naving the freezing and melting capabilities, i.e., those for input-output and D/B handling, are revised and made more basic. This revision of primitives increases Prolog's ability to handle variables, hence clauses as data objects.

跆拳道 歷史의 文獻的 考察

金光成,高永哲 龍仁大學校 1988 용인대학교 논문집 Vol.4 No.-

There is a record on "Kakj?(각저)" in ancient times, which seems to be one of the records connected with similar examples of the national sport of Korea, Taegw?ndo.And "Subakh?i(수박희)" written in the "History of Kory?" and the authentic "Story of King Tae-Jong" of the "History of Ch?son Dynasty" is surely a kind of martial art using hands in competition and can be said to be the record with the clear base on the history of Taegw?ndo. "Subakh?i" is thought of as the typical martial art using hands (or fists) ; "Kakj?h?i(각저희)" is, on the other hand, a martial art which is similar to "Subakh?i " and has another power.The two arts should be regarded as the traditional martial arts that have been changed and developed through the mutual influence and competition. "Kakj?" or "Kakry?k(각력)" is certainly related to Taegw?ndo, in the respect that it requires the agility of hand movement.However, it is clear that the very "Subakh?i" is a kind of martial art (which has been) developed into the typical form of the orthodox Taegw?ndo.

多地域 負荷周波數 制御에 依한 動的負荷狀態 推定機構의 效果

裵相賢,丁采榮,李雄基,金蘭 조선대학교 기초과학연구소 1989 自然科學硏究 Vol.12 No.1

This paper presents a method to design pseudo decentralized load frequency control(LFC) based on digital controllers which improves dynamic responses in multi-area power systems by incorporating computational time delay. Assuming that the amplitude of the load fluctuation is small and invariant, behavior of the power system in expressed by a set of linear differential equation, with constant coefficients. First, in order to synthesize a sampled date controller, the system is digitalized at appropriate sampling period by using numerical approximation method. Next, the centralized control gains incorporating time delay are determined based on the optimal theory. In order to damp a constant disturbance, we make use to digital servo system having one controller delay. From the point of view of application to LFC problem, the area control error (ACE) is chosen as output variables of servo system.

강원대 학술림과 경춘가도(청평)변 잣나무 잎과 수피의 pH 및 수용성 황함량에 관한 연구

이상덕,이홍률,주영특 한국농림기상학회 2004 한국농림기상학회지 Vol.6 No.3

This study investigated effects of water content in leaf, leaf acidity, bark acidity and water soluble sulfur contents by vehicle. The results were as follows: The average water content in Pinus Koraiensis leaves at Cheongpyoung and Chuncheon were 49% and 51% respectively. The average leaf acidity and bark acidity at Cheongpyoung and Chuncheon were respectively pH 4.8 and pH 4.9 in leaf, pH 5.3 and 5.4 bark. The average water soluble sulfur content in leaves showed a significant difference between Cheongpyoung and Chuncheon of 0.133% and 0.053% respectively.

中世 體育이 지닌 現代的 意味 : 유럽地域의 各 階層別 中心으로

金相洪,李淳川,裵永相 啓明大學校 生活科學硏究所 1986 科學論集 Vol.12 No.-

This study was conducted to research into the gymnastic circumstances according to medieval thought and its classified classes. The results of medieval physical education and their contributions to us on the basis of characteristics of their classes and their physical activity are as follows: 1. The gymnastics development of the Middle Ages was hindered by Christian view on physical culture. 2. The aristocratic view on gymnastics was changed into equalitarian by the birth of Christianity. 3. The physical education of Knight was actual military training in the early age and a formal one in later age, moralism was introduced into physical education through knighthood. 4. The medieval gymnastics activities avoided by knight, chmchemn, and aristocracy were highly popular among guidsmen, bourgeois and the peasantry as a recreation like ball-game and dancing. This was developed into modern gymnastic tendency. 5. The medieval gymnastics which was called dark age of physical education owing to the gymnastics view of Stoic asceticism was advanced through the middle of medieval era to ward the modern form of sportmanship in later age.

무선 시스템의 안전한 전송을 위한 표준 End-To-End Security 플랫폼의 제안

임승채,김태연,오경희,정채영 조선대학교 기초과학연구소 2003 自然科學硏究 Vol.26 No.-

As various mobile service display a growth lease in a point of time that left an IMT-2000 commercialization near at hand. a security problem of wireless Internet environment is coming to the front by a large issue. A comparative analysis does security solution (WAP. ME. I-Mode) used for Data transmission on the wireless Internet in this paper and offers the platform which can solve an End-To-End Security problem. A proposed mobile authentication platform is the possibility suggest which can provide a safe mobile environment as a higher security level is provided, and stopping up effluence for me of plaintext with using a standardized encryption packet in WAP Gateway of the existing WAP.