• Journal of the Korean Society of Marine Environment & Safety
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• v.26 no.5
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• pp.561-568
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• 2020

A performance analysis was conducted according to changes in inflow velocity and the tip speed ratio of a portable horizontal-axis hydro turbine that can be used for marine leisure sports and outdoor activities by using the commercial computational fluid dynamics software ANSYS CFX. By using the analysis result and flow field analysis, the design was reviewed and the performance of the device was confirmed. In addition, data necessary to improve the performance of the hydro turbine were acquired by performing an additional performance analysis according to the variable blade pitch angle. The results among the numerical analysis cases show that the highest performance at all inflow velocities and blade pitch angles if achieved at a tip speed ratio of 4. The output power was found to be 30 W even under some conditions below the design flow rate. Among the numerical analysis cases, the highest output power (~ 85 W) and power coefficient (~ 0.30) were observed at an inlet flow rate of 1.5 m/s, a blade pitch angle of 3°, and a tip speed ratio of 4.

• Journal of Digital Convergence
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• v.15 no.8
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• pp.501-509
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• 2017

The purpose of this study was to review the effects of the physical fatigue induced by overtraining on cognitive information processing and emotional change of athletes by neurophysiologic study. And to provide basic data for the athletes and coaches in the sports field to improve understanding of the overtraining symptoms from the brain physiological point of view. We reviewed the domestic and international academic materials and research reports published in the last 20 years using electronic databases and examined the literature that is consistent with the purpose of this study among the retrieved documents. Based on the reviewed literature, we examined the cognitive information processing and emotional change of the athlete according to the training, and overtraining can accumulate the fatigue of the body, which can cause severe side effects in terms of cognitive ability and emotional ability of athletes as well as deterioration of performance. The study using P300 and EEG cerebral hemispheric asymmetry difference indices also confirmed the possibility of a new approach to understand psychological and physiological effects of overtraining on information processing and emotional changes.

• 한국데이터정보과학회:학술대회논문집
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• 2006.04a
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• pp.267-278
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• 2006

The purpose of this research is to identify differences between characteristics of purchase behavior of outdoor wear consumers, demographic variables and mountain climbing related variables. The subjects of surveys are selected among men and women consumers having experiences of purchasing outdoor wear in ages from 20's to over 50's who live in the vicinity of Busan. Data and information collected are analyzed by using SPSS Program. Results from the analysis of purchasing purpose indicates that they buy outdoor wear conducive to two similar reasons; that is, "only to exercise and enjoy mountain climbing" and "either to wear it in time of climbing mountain or everyday life," and results from the analysis of purchase frequency reveals that '$1\sim2$ times'a you is the highest. Results from analysis of preference of brand of outdoor wear reveals that Kolon Sport is followed by the North Face and K2.

• Proceedings of the KGS Conference
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• 2002.05a
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• pp.49-53
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• 2002

국토의 효율적 이용과 여가공간의 개발에 있어서 산악지형의 개발 잠재력은 무궁무진하다고 볼 수 있다. 그간에 산악지형의 개발은 관광자원으로서의 활용이라는 견지에서 무분별한 개발과 자연환경 훼손을 방치해왔던 것이 사실이다. 산악지형의 관광자원 활용은 그 범위에 있어서나 방법에 있어서 매우 다양한 방식을 채택할 수 있다. 한국의 산이 보유하고 있는 자연경관과 문화유적이 접목된 명산사찰을 활용한 문화관광, 자연자원의 보존과 경제 개발, 도시민의 위락 여가공간 제공이라는 세 가지 목적을 동시에 충족시킬 수 있는 산악형 자연공원, 동계스포츠 활동을 위한 스키리조트의 개발과 이용, 마지막으로 산악지형의 경제 발전을 위한 대체산업 육성이라는 취지 하에 등장한 산지 카지노리조트 등 사회, 문화, 경제, 보건, 오락 등 산지는 그 효용성을 날로 더해가고 있다. 산은 더 이상 인간과 격리된 공간이 아니라, 인간의 생활 공간이자 휴식공간이며, 다양한 여가행위를 위한 공간이다. 유럽 등 구미 관광 선진국에서는 이미 산악지형 고유의 경제적, 사회적 중요성에 입각하여 공간의 효율적인 정비를 통해 합목적적이고 친환경적인 산악형 리조트 건설을 통해 지속적인 개발을 추진하고 있으며, 개발에 일부제약이 뒤따르기는 하지만, 관광개발을 위해서 환경보존을 필수적인 조건으로 인식하고 있다. 다시 말하면 관광개발과 환경보존은 불가분의 관계에 놓여있다는 것이다. 따라서 산이 우리에게 가져다주는 이로운 점을 생각할 때 인간의 지나친 개발욕구와 몰지각한 자원활용을 위한 관점에서 산을 보아서는 아니될 것이다. 산을 개발하고 정비하여 관광자원으로 활용할 때보다 친환경적인 시각으로 접근해야 하며, 우리의 산이 우리에게 돌려줄 것을 생각하기 보다 우리가 산에게 해주어야 할 것이 무엇인지를 먼저 생각한다면, 산은 우리에게 경제적 이득과 함께 우리의 여가생활을 위한 최적공간으로 다가설 것이다(요약 및 결론에서 발췌)는pocyanidin C-1-3'-3" -3.'S _0-trigallate는 100rM에서 70%의 강한 저해효과를 나타냈으며,epigallocatechin-(4$\beta$$\longrightarrow$8)-epigallo-catechin-(4$\beta$$\longrightarrow$8)-catechin는 51%의 저해효과를 나타내었다. 산업적응용을 위해 분획한 폴리페놀군은 미백효과 검증실험인 tyrosinase 저해율 측정평가에서 폴리페놀 함량이 가장 높은 Fraction 111의 경우 Sooppm에서 74.2%의 높은 저해율을 나타내었다. 항산화력 실험에서는500pw1이상에서 강한 활성능을 보인 SOD 유사활성능을 제외한 나머지 DPPH와 xanthine oxidase 저해효과에서는 Fraction II와III 모두가50ppm이상에서 80% 이상의 높은 유리라디칼 소거능력을 나타내었다. 그리고 각 Fraction별 항균력 측정 결과 Fraction 르와 111이 우수하게 나타났고 항균활성은 그람음성균보다 그람양성균에서 효과적이었으며, 농도별 항균력시험 결과 농도가 증가할수록 비례하여 저해율도 증가함을 알 수 있었다. 첨가농도를 달리하여 미생물의 생육도를 측정한 결과, fraction II磎꼭\ulcorner경우 그람양성균에 대해 500 ppm 이상에서 뚜렷한 증식억제효과를 나타내었다.서 뚜렷한 증식억제효과를 나타내었다.min/+}$계 수컷 이형접합체 형질전환 마우스에 AIN-76A 정제사료만을 투여한 대조군은 1.40$\pm$0.24(100%)에 비하여 I3C 저농도 투여 실험군(Group 1; 0.85$\pm$0.23; 61%, P<0.01), 그리고 I3C 고농도 투여 실험군(Group 2 ; 1.32$\pm$0.2

• Journal of the Korean Applied Science and Technology
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• v.35 no.4
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• pp.1185-1196
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• 2018

The purpose of this study was to investigate the effects of 12-week aquarobics exercise on blood lipids, atherogenic index, and liver functions in elderly women. The subjects for the study were 25 healthy elderly women volunteers, aged 65 to 80 years, composed of the aquarobics exercise group (n=13) and control group (n=12). Twice a week for 60 minutes for 12 weeks. The exercise intensity was set to RPE 11-12 for 1 week to 4 weeks, RPE 13-14 for 5 week to 8 weeks and RPE 15-16 for 9 week to 12 weeks respectively. The test data were analyzed by two-way repeated measures ANOVA, paired t-test, and independent t-test. The alpha level of .05 was set for all tests of significance. The results of the study in the aquarobics exercise group were as follows; LDL-C (p<.05), AST (p<.05) had significantly decreased, with TC (p<.01), TG (p<.05), LDL-C (p<.05), LDL-C/HDL-C (p<.05), TG/HDL-C (p<.05), AST (p<.001) significantly lower than control group. Consequently, these findings suggest that regular aquarobics exercise will be effective for preventiy the metabolic syndrome and cardiovascular health in elderly women.

• 재활복지
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• v.20 no.3
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• pp.105-124
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• 2016

The This study aims to verify the causal relationship among physically disability persons participation in exercise, heart rate variance, and facial expression recognition. To achieve such research goal, this study targeted 139 physically disability persons and as for sampling, purposive sampling method was applied. After visiting a sporting stadium and club facilities that sporting events were held and explaining the purpose of the research in detail, only with those who agreed to participate in the research, their heart rate variance and facial emotion awareness were measured. With the results of measurement, mean value, standard deviation, correlation analysis, and structural equating model were analyzed, and the results are as follows. The quantity of exercise positively affected sympathetic activity and parasympathetic activity of autonomic nervous system. Exercise history of physically disability persons was found to have a positive influence on LF/HF, and it had a negative influence on parasympathetic activity. Sympathetic activity of physically disability persons turned out to have a positive effect on the recognition of the emotion, happiness, while the quantity of exercise had a negative influence on the recognition of the emotion, sadness. These findings were discussed and how those mechanisms that are relevant to the autonomic nervous system, facial expression recognition of physical disability persons.

• The Journal of Korean Academy of Sensory Integration
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• v.17 no.2
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• pp.41-55
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• 2019

Objective : This study was conducted to validate the content validity of the Korean version of the school setting interview (SSI) that assesses the adequacy of school environments for students aged 9-19. Methods : The Korean version of the SSI, which was completed via a translation-reverse translation process, was verified by conducting a questionnaire on category suitability two times with 35 experts. Results : The content validity index (CVI) for the entire K-SSI tool was .90 in the first test. The "Maps and diagrams" measurement in reading items and the "Taking a shower" measurement in sports activities were both below .75. A second round of verification was conducted after the CVI was modified. As a result, the secondary verification CVI results were further raised to .93. Conclusion : This study confirmed that the K-SSI contains items that are appropriate to Korean culture; it has been proven to have high content validity. Future continuous research and clinical use are required to study the validity and reliability of the K-SSI. Further, this tool should also be applied to students with diverse disabilities who face difficulties in school settings.

• The Journal of the Korea Contents Association
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• v.21 no.5
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• pp.681-694
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• 2021

This study is aimed to investigate the effects of perceived value of the users in the relationship between service qualities of the Pilates training centers, which has been recently increasing, and their reuse intention. A survey research was conducted with 487 users who used the Pilates training centers and collected data were analyzed using SPSS 23.0 and AMOS 23.0 programs. The analysis results are as follows. First, service qualities perceived by the Pilates users including external service, quality of trainers, training program, and tuition fee showed significant impact on reuse intention, positively. Second, service qualities perceived by the Pilates users including external service, quality of trainers, training program, and tuition fee showed significant impact on both functional and emotional values, positively. Third, functional and emotional values perceived by the Pilates users showed significant impact on reuse intention, positively. Fourth, significant mediating effect of functional value was found in the relationship between service qualities of the Pilates training centers, which were external service, quality of trainers, training program, and tuition fee, and reuse intention. Fifth, significant mediating effect of emotional value was found in the relationship between service qualities of the Pilates training centers including training program and tuition fee, and reuse intention.

• Journal of Korea Entertainment Industry Association
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• v.14 no.8
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• pp.381-390
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• 2020

This purpose of study was to influence of fitness club leader's emotional labor on job involvement and occupation performance. This study aims at providing fundamental data and information on fitness club leader's emotional labor. The survey was done through 250 copies and excluding 23 copies ran an analysis on the remaining 227(90.8%) copies. After question investigating the data which is collected used IBM SPSS statistics 21 and IBM AMOS 21 program, frequency analysis, Exploratory factor analysis and confirmatory factor analysis, convergent validity, discriminant validity, Cronbach's α, correlation analysis, path analysis through Structural Equation Model(SEM). The result of this study were as follows. First, fitness club leader's emotional labor showed (-) effects on job involvement. Second, fitness club leader's emotional labor showed (-) effect on occupation performance. Third, job involvement showed (+) effects on occupation performance. Fitness instructors have severe emotional labor. Therefore fitness instructors manage their emotional labor. This can increase job commitment and job performance. For teeth manager need to increase support options from fitness instructors.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.16 no.3
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• pp.152-160
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• 2023

After the recent COVID-19 outbreak, more and more people are paying attention to health care. Many people feel uncomfortable in life due to muscle pain after sports or exercise as a hobby and often take a break from exercise. After exercising for a long time or exercising excessively, pain appears throughout the body within 24 to 48 hours after exercise. This pain is called delayed onset muscle soreness (DOMS). In this study, the effectiveness of the pain relief of delayed onset myalgia was verified by using a high-frequency pain therapy device that generates deep heat. EMG was measured before and after pain treatment at ordinary times, RMS values were obtained through analysis, statistical analysis was performed using the SPSS program, and it was judged to be statistically significant. In addition, statistical analysis of the RMS value between normal and after pain treatment was conducted to confirm that there was no significance, and to confirm how much it returned to normal after pain treatment. In addition, since the standards for pain are different for each person even if the size of the same pain is the same, the NRS questionnaire for the size of pain was conducted, and the size of pain felt by the subjects was analyzed using the SPSS program and statistical significance was obtained. Therefore, as a result of this study, the high-frequency pain therapy device generated deep heat in the pain area to raise the temperature, and expanded the arteries and capillaries to increase blood flow, thereby increasing blood circulation and metabolism, and alleviating the pain of delayed onset muscle pain.