• 해양환경안전학회지
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• 제20권6호
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• pp.640-645
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• 2014

본 연구는 2010년 1월부터 12월에 걸쳐 우리나라의 서남해역에 위치한 인공적으로 조성한 해수욕장에서 수색변화와 저층바닥의 해조류의 번식 등의 문제점을 해결하기 위해 SS, COD, $NH_4{^+}-N$, TP, MPN과 저질 조사를 통해 해수욕장의 적합성을 판정하고 수질관리 방안을 제안하고자 하였다. 조사 결과, MPN 기준에는 만족하였으나 높은 농도의 SS와 TP로 인해 관리요망의 수준 이하로 확인되었다. 수질오염의 주요 원인은 해수 순환의 악화로 인해 해수가 장시간 체류되어 수온이 상승하고 침강된 퇴적물이 재 부유되어 수색이 변하고 탁도가 악화되며 저층 바닥에 해조류가 발생되고 있는 것으로 밝혀졌다. 이러한 문제점을 개선하기 위해서는 우선 해수의 유통을 원활하게 하고 오염된 퇴적물을 준설하거나 피복 또는 저질개선제를 투여하는 방법이 적용될 수 있으며 해수욕장으로 유입되고 있는 점원과 비점오염원을 저감 차단해야 될 것으로 판단되었다.

• 약학회지
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• 제58권3호
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• pp.181-189
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• 2014

The aim of this was to evaluate the effects of Rhus Verniciflua Stoke (RVS) extract powder on the endurance capacity for the forced swimming mice. Thirty mice were divided into 3 groups including negative control, 250 (RVS-250) and 500 (RVS-500) mg/kg RVS extract powder groups for 4-times swimming exercises. The swimming times to exhaustion in RVS-250 and RVS-500 mice were prolonged 1.6- and 2.0-fold at 4 weeks compared with negative control mice, respectively. Blood biochemical parameters for AST, ALT, T-CHO and TG were not significantly different between RVS fed or negative control mice. However, blood concentration of creatinine was significantly increased in RVS-250 mice, but not in RVS-500 mice. During the longer swimming exercise in RVS group, blood glucose and lactate levels were significantly decreased, but free fatty acid not changed. And also LDH levels were significantly decreased in RVS groups compared to negative control mice. Hepatic lipid peroxidation was not affected by RVS, but SOD and catalase activity were significantly increased in RVS groups. Interestingly, the levels of testosterone and free testosterone were significantly increased in RVS groups before swimming exercise, but they were not significantly changed among groups after swimming exercise. The present results suggest that RVS extract powders may enhance swimming exercise performance by recovering the exercise-fatigue via reduction of blood LDH activity and by burning blood glucose as an energy source. These results imply that RVS-produced testosterone may act as an energy buster to enhance physical activity.

• 한국응용과학기술학회지
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• 제36권1호
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• pp.34-46
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• 2019

비만은 대사증후군과 밀접한 관련이 있다. 본 연구는 8주간 고지방식이를 섭취한 쥐에서 고지혈증 치료제인 피노피브레이트(fenofibrate) 단독처방, 수영운동 단독처방 및 fenofibrate와 수영운동의 병합처방이 비만을 조절하는지를 조사하고, fenofibrate와 수영운동의 병합처방이 fenofibrate 단독처방에 비해 효과적으로 비만을 조절하는지를 분석하였다. Fenofibrate 단독처방과 수영운동 단독처방 모두 대조군에 비해 비만과 관련된 요소들인 몸무게, 지방무게, 혈청 지질성분 및 지방세포 크기를 감소시켰다. 쥐는 fenofibrate와 수영운동의 병합처방 되었을 경우 fenofibrate 단독처방 되었을 경우에 비해 비만과 관련된 요소들이 더 효과적으로 감소되었다. 대조군에 비해 fenofibrate 단독처방, 수영운동 단독처방 및 fenofibrate와 수영운동의 병합처방 모두 혈청 포도당 수치를 감소시켰다. 본 연구는 fenofibrate와 수영운동의 병합처방이 비만과 혈당을 효과적으로 조절함으로써 고지방식이 섭취로 인해 발생되는 대사증후군의 억제에 공헌할 것임을 제시하고 있다.

• 제어로봇시스템학회논문지
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• 제19권9호
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• pp.782-790
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• 2013

In this paper, we propose a better solution for swimming plans of an articulated underwater robot, Crabster, with a view point of biomimetics. As a biomimetic model of underwater organisms, we chose diving beetles structurally similar to Crabster. Various swimming locomotion of the diving beetle has been observed and sorted by robotics technology through experiments with a high-speed camera and image processing software Image J. Subsequently, coordinated patterns of rhythmic movements of the diving beetle are reproduced by simple control parameters in a parameter space which make it easy to control trajectories and velocities of legs. Furthermore, a simulation was implemented with an approximated model to predict the motion of the robot under development based on the classified forward and turning locomotion. Consequently, we confirmed the applicability of parameterized leg locomotion to the articulated underwater robot through the simulated results by the approximated model.

• 대한물리치료과학회지
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• 제4권1호
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• pp.329-341
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• 1997

Teaching swimming to the disability children's has been an accepted adjunct to other therapeutic and rehabilitative modalities for several decades. Much has been written on this subject during ths past 30 years both in the United States and in England. The purpose of this article is First, to describe the basic on swimming program equipment and principles of treatment. Second, an swimming program designied specially for use with disability children's. The foregoing designied swimming program as a recreational and therapeutic activity has tremendous potential for maintaining or improving the psychological and physical well being of the disability children's. A swimming or pool therapy program which is under the supervision of a therapist with a keen understanding of the nature and complexity of disability children's.

• 한국수산과학회지
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• 제42권2호
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• pp.165-170
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• 2009

Recently, wide spread distribution of the giant jellyfish, Nemopilema nomurai, has occurred in the East China Sea. This increased distribution has caused serious problems in inshore and offshore fisheries in Korea and Japan. As a result, it is necessary to evaluate the damage caused to the fisheries by jellyfish. Accordingly, several hydroacoustic studies have been conducted to estimate the target strength (TS) of the giant jellyfish. However, the effects of fluctuation in the acoustic scattering characteristics on swimming patterns have not yet been elucidated. Therefore, in this study, we theoretically estimated the effects of changes in the acoustic scattering pattern on the swimming behavior of jellyfish using the Distorted Wave Born Approximation (DWBA) model. The results confirmed that acoustic scattering of jellyfish results in a significant change in their swimming pattern. Specifically, our theoretical estimation indicated that the TS of giant jellyfish (d=40 cm) fluctuated until 8.5 dB at 38 kHz, 13.8 dB at 70 kHz, and 15.1 dB at 120 kHz based on changes in their swimming patterns.

• The Korean Journal of Physiology and Pharmacology
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• 제13권6호
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• pp.497-502
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• 2009

Exercise-mediated physical treatment has attracted much recent interest. In particular, swimming is a representative exercise treatment method recommended for patients experiencing muscular and cardiovascular diseases. The present study sought to design a swimming-based exercise treatment management system. A survey questionnaire was completed by participants to assess the prevalence of muscular and cardiovascular diseases among adult males and females participating in swimming programs at sport centers in metropolitan regions of country. Using the Fuzzy Analytic Hierarchy Process (AHP) technique, weighted values of indices were determined, to maximize participant clarity. A patient management system model was devised using information technology. The favorable results are evidence of the validity of this approach. Additionally, the swimming-based exercise management system can be supplemented together with analyses of weighted values considering connectivity between established indices.

• 한국수산과학회지
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• 제46권3호
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• pp.273-281
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• 2013

The movement patterns of fish aggregations swimming freely near artificial reefs on August 24, 2006, at Suyeong Man, Busan, Korea, were acoustically investigated and analyzed. Acoustic surveys were conducted using a 70kHz split-beam echo sounder, 330 kHz side-scan sonar and a 310 kHz imaging sonar. Algorithms for tracking the movement of fish aggregations swimming in response to artificial reefs were developed. The travel direction and the swimming speed for two aggregations of fish were estimated from the trajectory orientations of echo responses recorded by the imaging sonar.The first group was floating just above the reef structure, while remaining in the midwater column, and the second group was swimming through and around artificial reefs near the seabed. The mean swimming speed was estimated to be 0.40 m/s for the midwater fish aggregation and 0.17 m/s for the bottom aggregation close to artificial reefs. These results suggest that the swimming behavior of fish aggregations passing close to artificial reefs near the seabed displayed a slower moving pattern than fish floating just above the reef structure in the midwater column.

• 로봇학회논문지
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• 제9권1호
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• pp.57-66
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• 2014

This paper describes the design concept of a bio-inspired legged underwater and estimating its performance by implementing simulations. Especially the leg structure of an underwater organism, diving beetles, is fully adopted to our designing to employ its efficiency for swimming. To make it possible for the robot to both walk and swim, the transformable kinematic model according to applications of the leg is proposed. To aid in the robot development and estimate swimming performance of the robot in advance, an underwater simulator has been constructed and an approximated model based on the developing robot was set up in the simulation. Furthermore, previous work that we have done, the swimming locomotion produced by a swimming patten generator based on the control parameters, is briefly mentioned in the paper and adopted to the simulation for extensive studies such as path planning and control techniques. Through the results, we established the strategy of leg joints which make the robot swim in the three dimensional space to reach effective controls.

• 생명과학회지
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• 제7권4호
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• pp.384-391
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• 1997

The purpose of this study was to investigate effects of swimming training and cholesterol diet on the activation of hepatic antioxidant enzymes and serum lipid in Sprague Dawley rats(24 weeks of age). They were divided into five groups which were made up of normal-diet detraining group(C), 2% cholesterol-diet detraining group(CC), 2% cholesterol-diet swimming training groups which were classified according to their training time(CSA: 12min, CSB:8min, CSC:4min). They were given normal diet for the first 6weeks and then, separated normal-dietary and 2% cholesterol-dietary for 14 weeks. During these periods, 10 weeks’ swimming training was performed after 4 weeks later. And then we analyzed blood and liver by decapitating those rats. Swimming training showed a tendency to increase the activation of GSH-peroxidase, Nonprotein-SH and malondialdehyde, and decrease total- cholesterol, LSL-C/HDL-C and VLDL significantly. Whereas, cholesterol diet which has no training showed decrease the activation of hepatic antioxodant enzymes, and increase total-cholesterol and LDL-C/HDL-C absolutely. These results suggest that swimming training should stimulate the activation of hepatic antioxidant enzymes and decrease total-cholestrol even if they had cholesterol diet.