• Journal of Korea Entertainment Industry Association
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• v.13 no.7
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• pp.375-384
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• 2019

The purpose of this study was to investigate the effects of long-term aerobic dancing exercise on body composition, physical fitness and mental function in older women over 70 years old. All subjects were limited to older women aged 70 to under 85. The experimental group performed aerobic exercise of 2-3 times a week for 9.2 ± 4.6 yrs, and the control group did not perform any regular exercise and spent 3-4 times a week mainly in the relaxing facility for older. As a results in this study, the weight, muscle mass and body fat percentage of the aerobic group were not significantly different from those of the control group, but there were significantly positive effects of aerobic group in visceral fat mass, abdominal obesity rate(%), body water content and systolic blood pressure(p < .05). In terms of physical fitness, Sit & reach, one-legged stand (right) and TUG of the aerobic group were significantly higher than those of the control group(p < .05), but there were no significant differences between two groups in the shoulder flexibilities and grip strength. MMSE as a cognitive function was not significantly different between the two groups, but GDS was significantly lower in the aerobic group than in the control group(p < .05). According to the correlation analysis between all variables and MMSE and GDS, MMSE was significantly inversely correlated with height (r = -0.425)(p < .05), and no correlation was detected with other variables. However, GDS have signitively negative correlations with resting heart rate(r = -0.464), sit & reach(r = -0.525) left(r = -0.491) and right grip strengths(r = -0.635) as well as positive correlation systolic blood pressure(r = 0.482) and TUG (r = 0.479), respectively(p < .05). In conclusion, long-term aerobic exercise of elderly women over 70 older had positive effects on variables related to metabolic disease (visceral fat and resting heart rate), silver fitness variables related to falls, and depression level in the elderly.

• The Journal of the Korea Contents Association
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• v.9 no.7
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• pp.225-232
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• 2009

This study conducted the following experiment to examine effects of cardiovascular function on lumbar stabilization exercise(LSE) in floor or swiss ball. This experiment was conducted to compare heart rate, systolic blood pressure, diastolic blood pressure and peripheral vascular oxygen saturation effects by lumbar stabilization exercise in floor or swiss ball with 18 normal adult and it divided 9 subjects. experiment group (1) is applying LSE on floor group and (2) is applying LSE on swiss ball group. Heart rate was measured by portable heart rate manometer, blood pressure was measured by hemodynamometer, and peripheral vascular oxygen concentration was measured using a computerized NURYTEC measuring apparatus analysis. These result lead us to the conclusion that systolic blood pressure and peripheral vascular oxygen concentration were influenced by LSE. but there was not differential effect between each groups. These results suggest that LSE has the capability to improve heart rate, blood pressure, peripheral vascular oxygen concentration. Consequently, LSE would be lead to increment of cardiovascular function.

• Aerospace Engineering and Technology
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• v.12 no.2
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• pp.193-201
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• 2013

Propeller is an important component of Human Powered Aircraft (HPA) propulsion system. HPA uses large diameter low rotational speed propeller to get high propeller efficiency. The propeller was designed by HPA propeller designing program. The propeller pitch is adjustable by rotating the blade axis angle at ground. Performance of the propeller for various parameters are analysed by the same program used for design. Off-design condition performance was also checked including pilot power change and flight speed change. The propeller was manufactured in ultra-light structure using carbon composite material down to 950g. The propeller was ground tested on ironbird and installed on KARI HPA. Finally the HPA flew 291m with this propeller.

• Journal of the Society of Naval Architects of Korea
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• v.36 no.2
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• pp.22-28
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• 1999

Small amplitude in-phase oscillations of multi-cylinders are considered both numerically and experimentally. Flow field is separated into inner and outer regions. The basic unsteady solution is obtained analytically and the secondary flow, termed as steady streaming flow, can be obtained numerically by using Finite Volume Code with Panel Method. The Particle Induced Velocimetry, one of whole field measurements, is introduced for comparison with numerical flow visualization quantitatively. Among the algorithms for PIV, the Three Step Vector Searching Technique is applied to reduce CPU time. Small but non-zero damping coefficient, that is important in lightly damped system can be obtained with varying number of bodies and distances.

• The Journal of the Korea Contents Association
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• v.14 no.11
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• pp.450-466
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• 2014

This study compared and analyzed body composition, physical fitness, and physical self-concept between gifted students in mathematics and science attending Korea Science Academy (KSA) and non-gifted students attending traditional high schools. The KSA students were 117 males who entered the school in 2009. As a control group, a total of 117 non-gifted students were randomly selected from 5 cities. The results of covariate analysis taken 2 year interval, pretest (2009) and posttest (2010), indicated that gifted students were significantly taller (p<.05) than non-gifted students, and were lower in BMI (p<.05) and PBF (p<.001). There was no significant difference in physical fitness between gifted and non-gifted students. But non-gifted students have a significantly higher self-concept in physical appearance (p<.05) and physical strength (p<.05). The internal/external frame of reference model and the Big Fish Little Pond Effect (BFLPE) theory were supported. Especially, gifted students were significantly higher (p<.01) in endurance self-concept than non-gifted students. We have discussion this result as the future research subject whether it come from the characteristics of the gifted's tenacity at high level tasks.

• 한국체육학회지인문사회과학편
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• v.56 no.5
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• pp.665-677
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• 2017

This study aimed to examine the evolution of exercise performance and medical assessments in U-12 youth football players. Participants were recruited from an youth football players (YFG, n=15; $11.2{\pm}0.9yrs$) and normal youth (CON, n=15; $11.5{\pm}0.6yrs$). Both groups were tested for exercise performance (health related physical fitness, skill related physical fitness, functional movement screen; FMS and Y-balance) and medical assessments (lower extremity alignment, range of motion; ROM and manual muscle test; MMT). YFG showed a positive effects on pacer in health related physical fitness, 50-m run and Single-leg standing with eyes closed in skill related physical fitness, active straight leg raise and rotary stability in FMS, non-dominant composite score in Y-balance, respectively compared to CON. However, YFG showed a negative effects on Q-angle of dominant and non-dominant in lower extremity alignment, dorsiflexion of non-dominant, plantarflexion of dominant and non-dominan in ROM, hip extension and abduction, knee flexion and extension of dominant, knee flexion and extension of non-dominant in MMT, respectively compared to CON. These results indicated that U-12 youth football players have shown excellent exercise performance, but medical assessments has proved negative effects.

• Journal of Korea Entertainment Industry Association
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• v.13 no.6
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• pp.165-173
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• 2019

This study aims to examine the moderating effects of band circuit training for the mortality improvement of elderly women to provide an effective exercise moderating program for the enhanced quality of life of the elderly. To achieve the purpose of this study, the moderating effects of 8 weeks of band circuit training in the Senior Fitness Tests (SFT) and Sitting Rising Tests (SRT) of elderly women ages 65 and older in Y city were examined and the following results were gained. The functional fitness of elderly women according to the moderating effects of band circuit training (sitting down in a chair and standing up, lifting 2 kg dumbbells, walking in place for 2 minutes, sitting in a chair and bending forward, hand holding behind one's back, walking back and forth for 2.44 m) and the Sitting Rising Test (SRT) displayed statistically significant interaction effects among measurement times and groups and positive improvements were shown in the test group after band circuit training moderation. These research results show that band circuit training moderation has a positive effect on functional fitness and SRT, which are associated with the mortality rate of the elderly, and thus it can be applied as an effective exercise moderation program for the improvement of quality of life through the mortality improvement of the elderly.

• Journal of Korean Medical classics
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• v.22 no.3
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• pp.299-320
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• 2009

한중 맥진기 관련 학술 교류와 맥진기 수출을 위한 전략으로 중국의 광주중의약대학 중의사를 대상으로 맥진과 맥진기에 대한 인식을 조사하여 보고하는 바이다. 임상에서 가장 중요하게 생각하고 활용도가 높은 전통적인 병증으로 장부병증과 팔강병증으로 나타났으며, 한방 진단방법 중 가장 중요하게 생각하고 활용하는 방법으로 문진과 맥진으로서, 그 이유는 진단 효율성과 환자와의 상담으로 나타났다. 또한 임상에서 한방 진단기기의 중요한 이유로는 측정기술과 데이터의 신뢰를 들었으며, 중요하지 않다고 생각하는 이유로는 측정기술과 데이터의 신뢰성 부족과 전통적인 진단법을 보조하기엔 적합하지 못함을 들었다. 진단방법 중에서 맥진의 중요도와 활용도는 75%가 가장 높게 나타났고, 맥진법 중에서 가장 잘 활용하는 부위는 촌구맥진법으로 나타났다. 촌구 맥진시 가장 중요하게 생각하는 요소는 환자의 자세와 손목 높이와 촌관척 부위였으며, 단안(單按)과 총안(總按)의 순서는 총안(總按)후 단안(單按)이 단연 우수하였다. 임상의 중요 맥상으로는 부침(浮沈)을 들었으며, 맥상 형성 기전과 표준화 연구에 가장 적합한 연구 방법론은 위수형세론에 입각한 문헌 연구와 병증별 맥상에 대한 임상 데이터 구축으로 나타났다. 그리고 대표적인 노인 특유의 맥상은 미세약맥이었으며, 그 이유는 노화로 인한 체력저하와 기혈부족을 들었다. 그리고 맥진기와 연계하는 만성 생활습관병 병증지표 연구개발에 가장 적합하다고 판단되는 병증 체계는 장부병증이었으며, 질병은 고혈압과 동맥경화증으로 나타났다. 또한 임상에서의 활용도와 유의성이 높은 맥진기로써의 주된 기능으로는 오장육부 상태 진단을 들었으며, 맥진기의 임상적인 활용도를 높일 수 있는 현대적인 임상 분야는 심혈관 질환이 가장 높게 나타났다. 맥진기 개발에 선행되어야 할 기반연구로는 촌관척 부위 찾기의 기준 확립과 임상 변증과의 관계 확립으로 나타났으며, 제공 받고자 하는 맥상 정보구성은 환자의 맥상명과 맥상 정도와 환자의 맥상에 따른 병증명 제시로 나타났으며, 제공되는 병증 서비스로는 장부병증이 가장 높게 나타났다.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.4
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• pp.725-732
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• 2020

This paper uses variables following as : to follow me well(0-9), it takes a lot of time to make a decision (0-9), lethargy(0-9) during physical activity in the exercise learning program of the children in the marginalized class. This paper classifies 'gender', 'physical education classroom', and 'upper, middle and lower' of age, and observe changes in ego-resiliency and self-control through sports rehabilitation therapy to find out changes in mental health. To achieve this, the data acquired was merged and the characteristics of large and small numbers were removed using the Label encoder and One-hot encoding. Then, to evaluate the performance by applying each algorithm of MLP, SVM, Dicesion tree, RNN, and LSTM, the train and test data were divided by 75% and 25%, and then the algorithm was learned with train data and the accuracy of the algorithm was measured with the Test data. As a result of the measurement, LSTM was the most effective in sex, MLP and LSTM in physical education classroom, and SVM was the most effective in age.

• Journal of the Korea Convergence Society
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• v.10 no.5
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• pp.79-84
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• 2019

The purpose of this study was to examine the effects of treadmill exercise on the aerobic function of dance majors in their 20s. The subjects consisted of 10 female Korean dance majors in their 20s as an experimental group and 10 normal female college students as a control group, and both groups conducted treadmill gait training. Their heart rate recovery (HRR), maximal oxygen uptake (MOU), maximal voluntary ventilation (MVV), and lactate recovery rate (LRR) were measured before and after the experiment. The comparison of changes in the subjects' aerobic function before and after the experiment showed that the experimental group gained more significant effects on HRR and LRR than the control group. Therefore, treadmill gait training may help Korean dance majors to improve their basic physical strength by enhancing their aerobic function, and the findings of this study are likely to provide basic data to support scientific exercise prescriptions.