• 한국운동역학회지
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• 제18권1호
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• pp.97-105
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• 2008

수영과 핀수영의 스타트 동작의 운동학적 변인들을 3차원 영상분석법으로 비교분석하였다. 수영 스타트에서는 상지는 후상방으로 몸통은 전상방으로 이동했다가 전하방으로 하강하는 양상을 보인 반면 핀수영 스타트에서는 모든 분절이 전하방으로 이동하는 양상을 보였다. 수영 스타트에서 신체중심은 멀리 전방으로 수평 이동하다가 하방으로 급격히 이동하는 반면 핀수영 스타트에서의 중심은 짧은 시간에 전하방으로 가깝게 이동하는 것으로 나타났다. 입수 시 수영의 중심은 수직 속도가 핀수영의 중심은 수평속도가 높게 나타났다. 수영과 핀수영 모두 상지의 속도가 하지보다 더 신체중심의 속도에 영향을 미치는 것으로 나타났다. 핀수영 스타트에서 고관절은 점프 전에 굴곡을 하는 반면 수영에서는 점프 후 공중에서 2번 굴곡을 하는 것으로 나타났다. 핀수영의 슬관절 굴곡 신전운동이 수영보다 더 급격한 것으로 나타났다.

• Journal of Sport and Applied Science
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• 제4권3호
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• pp.23-28
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• 2020

Purpose: This study sought to explore current status of children's swimming pool in Korea and to generate insights regarding safety management of children's swimming pool. Research design, data, and methodology: The study reviewed literatures including documents of Ministry of Culture, Sports and Tourism and sport facility-related articles. Furthermore, the study collected additional statistics via search engines. Results: First, numbers of swimming pools have been dramatically increased since 2016 and Korea experienced an increase of 37% from 2010 to 2019. Of the 611 indoor swimming pools, most swimming pools are located in Gyeonggi province with 27.7% (n=169). Seoul and Gyeonggi-do have the highest proportion of swimming pools in Korea. Second, in types of swimming pools, 47.6%(n=291) was children's swimming pool which is the highest proportion in the nation. Children's swimming pools are also mostly located in Seoul and Gyeonggi province with 57%. Third, of 372 profit swimming pools, children's pools show the highest number with 78%(n=291). Conclusions: Children's swimming pools are picking up faster than the other types of swimming pool. Yet, safety-related studies are still lack. This provides motivations to produce managerial insights from academia and business sectors. Moreover, more studies of legal issues should be conducted. Implications were discussed.

• 복식문화연구
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• 제7권6호
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• pp.68-84
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• 1999

The purpose of this study was analyze how korean adult women\`s swimming suit buying behavior varied according to consumer characteristics. Especially, it was intended to provide basic materials for swimming suit product development and quality improvement appropriate to consumer characteristics with a focus on product evaluation criteria. Questionnaire research was conducted for 850 adult women resident in Seoul, to whom questionnaire were distributed and who were asked to complete their questionnaires. 1. As for buying motive, of swimming suit buying behavior, it was shown that the highest proportion of adult women bought their new swimming suit because their old swimming suit was wornout and most adult women tended to buy their new swimming suit or their own will rather than at others\` suggestion. 2. As for the source of information at a time. of swimming suit purchase, adult women collected information from the product on display most and bought their swimming suit in a planned way in relation to the degree of purchase planning. 3. As for product evaluation criteria, adult women showed the high scores in order of the type and quality of material, activity and functionalism, dimensions and fitness. 4. In many cases actual swimming suit purchasers were the adult women who bought their swimming suit, and they used the department store or the large shopping center as the place of purchasing the swimming suit. Its reason was that the department store or the large shopping center had a diverse assortment of products. As for the degree of their travelling companion\`s influence, it was found that most adult women were influenced by their travelling companions when purchasing their swimming suits. 5. As for the level of satisfaction with swimming suit purchase, it was shown that adult women were generally satisfied with their swimming suit purchase. It was found that their level of satisfaction was higher in order of activity and functionalism, the type and quality of swimming suit materials, and ease in washing management while they showed the low level of satisfaction with price, the fastness of color to washing, light and detergents and durability.

• 한국수산과학회지
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• 제30권6호
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• pp.929-935
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• 1997

The total energy of fish movement and the maximum burst swimming speed were estimated and formulated in accordance with body length and water temperature for several species in fisheries by empirical methods and also by using published results. Under the assumption of swimming energy reserve of a fish at the initial rest state, the swimming endurance of fish with different body lengths, swimming speeds and angular velocity was calculated using the relevant equations under similar conditions in tank experiments as well as natural conditions in field. Relative swimming energy efficiency or the transition swimming speed between red and white muscle for energy consumption was represented as a trigonometric function of swimming speed ratio. Therefore, this model does closely approach the actual swimming abilities and their limits especially in relation to the fishing gear operation and allow for the greater vitality of the wild fish in the fields.

• 로봇학회논문지
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• 제11권4호
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• pp.285-292
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• 2016

For articulated swimming robots, there have been no researches about controlling the motion or trajectory following. A control method for articulated swimming robot is suggested by extending a previous algorithm, ESPG (Extended Swimming Pattern Generator). The control method focuses on the situation that continuous pre-determined swimming pattern is applied for long range travelling. In previous studies, there has not been a way to control the propulsive force when a swimming pattern created by ESPG was in progress. Hence, no control could be made unless the swimming pattern was completed even though an error occurred while the swimming pattern was in progress. In order to solve this problem, this study analyzes swimming patterns and suggests a method to control the propulsive force even while the swimming pattern was in progress. The angular velocity of each link is influenced and this eventually modifies the propulsive force. However, The angular velocity is changed, a number of problems can occur. In order to resolve this issue, phase compensation method and synchronization method were suggested. A simple controller was designed to confirm whether the suggested methods are able to control and a simulation has affirmed it. Moreover, it was applied to CALEB 10 (a biomimetic underwater articulated robot) and the result was verified.

• Journal of Sport and Applied Science
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• 제6권3호
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• pp.1-7
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• 2022

Purpose: The purpose of this study is to provide basic data for developing an educational program that can be practically applied in the field of survival swimming education. Research design, data, and methodology: This study reviewed prior literature including governmental reports, journal articles related to survival swimming programs at home and abroad. Based on the basic data collected through literature, domestic and foreign educational institutions and national educational programs were cataloged and analyzed. Results: The study found that among the goals of swimming education, the prevention of water accidents and the cultivation of water safety skills along with improving swimming ability are very important educational goals. Currently, domestic survival swimming education programs are divided into classes and training sessions, so it is necessary to develop an educational program according to each individual's swimming ability and a unified and systematic program through education for each level of survival swimming learners. Conclusions: It is thought that the reinforcement of the leader's capacity for quality improvement will have a positive effect for the development of survival swimming. Further implications were discussed.

• 한국건축시공학회지
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• 제9권3호
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• pp.87-94
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• 2009

Recently, in accordance with the interesting on well-being as well as the revitalization of living athletics, it is current tendency that people who use the swimming pools are on increasing. However, because the most of indoor swimming pools have ever used the reflection finishing materials likely as the tile due to the property of its hydrophilic space, the inside of indoor swimming pool is vibrating too much, and some problem which the voice and music do not delivering clearly is occurring when swimming lessons or underwater aerobics(synchronized swimming) and swimming game. Based on such viewpoint, locating the object on actually built indoor swimming pool, this Study has ever grasped its physical acoustic property, and finally designed the indoor swimming pool that contains an optimum acoustic condition, by remodelling it through an acoustic simulation. It is considered that such study result could be utilized as the useful materials when constructing the similar indoor swimming pool, hereafter.

• Preventive Nutrition and Food Science
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• 제4권3호
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• pp.184-187
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• 1999

Increase in fat mobilization by capsaicin(CAP) was investigated in high-fat-fed mice using an adjustable current water pool. Male ICR 7-wk-old mice were fed a high fat diet [50% total energy content in the diet(E%) fat, 20 E% protein, 30E% carbohydrate] for 2 wk and one group (HCAP) was orally administered CAP at 2 h before swimming. After being accustomed to swimming , the mice were subjected to forced swimming every 2d in the current water pol and the total swimming period until exhaustion was measured . The total swimming period was used as index of swimming capacity. Swimming time to exhaustion of treated mice was significantly longer than that of the high-fat-fed control group (100.2$\pm$10.6 vs. 58.0$\pm$8.5min, P<0.01) after 2wk of training. The concentration of serum-free fatty scids gradually increased up to 2 h in CAP -administered mice. The perirenal adipose tissue weight of CAP -administered mice (HCAP) before swimming was lower than that of the high-fat-fed mice adminstered placebo solution (HP) which had not ingested CAP during the 2 wk. These results suggest that the increase of swimming capacity of CAP-administered high-fat-fed mice was due to an increase of fat mobilization that was induced by CAP.

• 한국콘텐츠학회논문지
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• 제9권12호
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• pp.391-399
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• 2009

본 연구의 목적은 중추신경계 손상의 쥐에 운동강도에 따른 신경계 회복을 알아보기 위해 부하수영과 무부하수영이 혈청 BDNF 농도와 행동학적 변화에 어떠한 영향을 미치는가를 확인하고자 하였다. 실험동물로는 Sprague-Dawley 수컷 흰쥐를 사용하였으며, Ketamine을 복강 내에 주사하여 마취한 뒤 제 1-2요추의 척수에 6-OHDA를 $100{\mu}{\ell}$ 주입하여 척수손상을 유발시켰다. 척수 손상으로 유발된 행동학적 변화를 알아보기 위해 BBB와 경사판 검사를 기록하였다. 혈청 BDNF는 수술 후 14일에 혈액을 채취해 흡광도를 측정하였다. 척수 손상 후 무부하군에서는 행동변화가 대조군에 비해 유의하게 증가하였고, 혈청 BDNF 농도는 다른 군에 비해 무부하군에서 증가하였다. 이러한 결과로 보아 저강도 수영운동을 중추신경 손상 후 초기에 적용하면 신경조직의 회복에 영향을 주리라 생각된다.

• 로봇학회논문지
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• 제7권4호
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• pp.259-266
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• 2012

In these days, researches about underwater robots have been actively in progress for the purposes of ocean detection and resource exploration. Unlike general underwater robots such as ROV(Remotely Operated Vehicle) and AUV(Autonomous Underwater Vehicle) which have propellers, an articulated underwater robot which is called Crabster has been being developed in KORDI(Korea Ocean Research & Development Institute) with many cooperation organizations since 2010. The robot is expected to be able to walk and swim under the sea with its legs. Among many researching fields of this project, we are focusing on a swimming section. In order to find effective swimming locomotion for the robot, we approached this subject in terms of Biomimetics. As a model of optimized swimming organism in nature, diving beetles were chosen. In the paper, swimming motions of diving beetles were analyzed in viewpoint of robotics for applying them into the swimming motion of the robot. After modeling the kinematics of diving beetle through robotics engineering technique, we obtained swimming patterns of the one of living diving beetles, and then compared them with calculated optimal swimming patterns of a robot leg. As the first trial to compare the locomotion data of legs of the diving beetle with a robot leg, we have sorted two representative swimming patterns such as forwarding and turning. Experimental environment has been set up to get the motion data of diving beetles. The experimental equipment consists of a transparent aquarium and a high speed camera. Various swimming motions of diving beetles were recorded with the camera. After classifying swimming patterns of the diving beetle, we can get angular data of each joint on hind legs by image processing software, Image J. The data were applied to an optimized algorithm for swimming of a robot leg which was designed by robotics engineering technique. Through this procedure, simulated results which show trajectories of a robot leg were compared with trajectories of a leg of a diving beetle in desired directions. As a result, we confirmed considerable similarity in the result of trajectory and joint angles comparison.