• 한국안전학회지
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• 제31권6호
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• pp.1-5
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• 2016

A bicycle is one of the most popular sporting goods in view of a sport activity and a human health. Metallic materials such as steel, aluminum, etc. were mainly used to the bicycle fork in the past. Nowadays, the carbon fiber reinforced composite materials are widely used to the manufacturing of a bicycle fork to reduce the weight and to increase the efficiency. Safety is a most important design parameter of a bicycle fork even if the weight and cost reduction are important. Bicycle failure may happen at the critical spot of a bicycle fork and cause the accident. In this paper, the composite bicycle fork will be analyzed to secure the safety and detect a critical spot by using the finite element method with Tsai-Wu failure criterion. The stress data were obtained for the laminated composites with various number of plies and fiber orientation under the bending load. Thus, design concept of a bicycle fork was proposed to secure the safety of a bicycle. The finite element analysis results show that the connection area between a steer tube and a fork blade is critical spot, and 75 or more layers of 0 degree are needed to secure the safety of a bicycle fork.

• The Korean Journal of Physiology and Pharmacology
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• 제22권4호
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• pp.427-436
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• 2018

The objective of this study was to analyze the concurrent treatment effects of ursolic acid (UA) and low-intensity treadmill exercise and to confirm the effectiveness of UA as an exercise mimetic to safely improve muscle atrophy-related diseases using Sprague-Dawley (SD) rats with skeletal muscle atrophy. Significant muscle atrophy was induced in male SD rats through hind limb immobilization using casting for 10 days. The muscle atrophy-induced SD rats were group into four: SED, sedentary; UA, daily intraperitoneal UA injection, 5 mg/kg; EX, low-intensity (10-12 m/min, $0^{\circ}$ grade) treadmill exercise; and UEX, daily intraperitoneal UA injection, 5 mg/kg, and low-intensity (10-12 m/min, $0^{\circ}$ grade) treadmill exercise. After 8 weeks of treatment, endurance capacity was analyzed using a treadmill, and tissues were extracted for analysis of visceral fat mass, body weight, muscle mass, expression of muscle atrophy- and hypertrophy-related genes, and endurance capacity. Although the effects of body weight gain control, muscle mass increase, and endurance capacity improvement were inadequate in the UA group, significant results were confirmed in the UEX group. The UEX group had significantly reduced body weight and visceral fat, significantly improved mass of tibialis anterior and gastrocnemius muscles, and significantly decreased atrophy-related gene expression of MuRF1 and atrogin-1, but did not have significant change in hypertrophy-related gene expression of Akt and mTOR. The endurance capacity was significantly improved in the EX and UEX groups. These data suggest that concurrent treatment with low-intensity exercise and UA is effective for atrophy-related physical dysfunctions.

• 농촌계획
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• 제16권4호
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• pp.147-156
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• 2010

Among the towns of GyeongJu and SamCheok on which I have surveyed about their amenity resources in 2010, I chose 5 towns that are close to the Eastsea to analyze the data and to devise how to revitalize fishing villages. And the results are as follows. 1. Although Yangbuk-myeon is geographically located to have all the aspects of fishing village, farming village, and mountain village, the resources utilized are mainly that of mountain village. There is need to utilize actively historical amenity resources like Munmudaewangreung of Yangbuk-myeon. 2. The use of amenity resources of Yangnam-myeon is centered on farm and mountain village. But if they utilize amenity resources of fishing villages of Eupcheon-port's neighborhood, it would be a big help for the revitalization of Yangnam-myeon which is depressed. 3. The fishing mackerels on boat of Gampo-eup Jeonchonri is a successful example of utilization of fishing village's amenity resources. However, there is need to utilize amenity resources of farming and mountain villages that are near to Gampo-eup, so it can attract visitors to stay longer. Particularly, the fishing villages of the East coast must develop 4 seasons program connecting the amenity resources of neighboring farm and mountain. 4. Geundeok-myeon is a town where they made the amenity resources of fishing village into tourist attractions. But considering the wide gap between Geundeok-myeon and neighboring fishing, farming and mountain villages that cannot get the advantage of development, there has to be some inducement in policy so every town can be developed evenly. 5. After analyzing how the towns utilize the amenity resources to make them tourist attraction, it is shown that Geundeok-myeon of SamCheok is the best town which is using fishing village's amenity resources well, and Yangnam-myeon and Yangbuk-myeon of GyeongJu are scarcely using them. About types of tourist attraction, the programs with scenic view of fishing village, with water-sport, and with Eco-experience are needed to improved.

• 디지털융복합연구
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• 제14권1호
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• pp.453-463
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• 2016

이 연구는 체육계열 학과 학생들의 중도탈락요인, 조직신뢰, 전과의도 사이의 관계를 조사하는데 목적이 있다. 4년제 6개 대학교의 체육계열 학과 480명의 학생을 연구 대상으로 설문조사를 실시하였다. 제안된 연구모형검증을 위해 구조방정식과 부트스트래핑을 이용하였다. 결론적으로, 중도탈락요인의 학문적 영역, 사회적 영역, 환경적 영역은 조직신뢰에 긍정적인 영향을 미쳤다. 그러나 중도탈락요인과 전과의도의 관계에서는 학문적 영역만이 전과의도에 긍정적인 영향을 미쳤으며, 사회적 영역 및 환경적 영역은 전과의도에 유의한 영향을 미치지 않았다. 또한 조직신뢰는 전과의도에 긍정적으로 유의한 영향을 미쳤다. 마지막으로 조직신뢰는 학문적 영역과 전과의도 사이에서 부분매개 역할을 하였으며 사회적 영역 및 환경적 영역과 전과의도 사이에서는 완전매개 역할을 하였다.

• Journal of Oral Medicine and Pain
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• 제45권2호
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• pp.23-28
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• 2020

Purpose: Temporomadibular disorders (TMDs) can result in chronic pain, which is often associated with psychological and sleep disturbance. Increased levels of psychological and sleep impairments are often related with poor treatment outcomes. The purpose of the present study was to evaluate clinical features, psychological profiles and the prevalence of clinical insomnia in TMD patients with chronic pain and to suggest an effective treatment approach. Methods: A total of 200 TMD patients who had visited the Pusan National University Hospital dental clinic for treatment of their pain were recruited from June 2018 through December 2019. TMD patients were classified into an acute (n=100) and chronic (n=100) group and compared the clinical symptoms. The primary diagnosis of TMD were categorized as TMD with joint pain group (TMD_J), TMD with muscle pain group (TMD_M) and TMD with joint-muscle mixed pain group (TMD_JM). Self- report measures of sleep quality and psychological profiles were evaluated via the Insomnia Severity Index (ISI) and the Korean Stress Response Inventory (SRI). Independent t-tests, Mann-Whitney U-tests, and chisquared test were used for the statistical analysis. Results: Chronic TMD patients showed higher pain intensity, as well as higher prevalence of related symptoms (headache, musculoskeletal pain) and myogenous pain. They also had significantly higher scores in all SRI parameters and a higher percentage of clinical insomnia than acute TMD patients. Conclusions: Based on the above results, psychological profiles and sleep quality assessments are necessary to provide essential data that will allow for improved treatment of chronic TMD patients.

• 예술인문사회 융합 멀티미디어 논문지
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• 제9권6호
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• pp.341-352
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• 2019

최근 e-sports에 대한 사회적 관심이 증대하면서 게임 리더십과 관련된 심리사회적인 요인들을 발굴하기 위한 노력이 점증하고 있다. 게임 리더십이란 게임 내에서 주어진 과제를 효율적으로 수행하기 위해 필요한 능력을 가리키는 것으로, e-sports 경기 진행과 팀워크 향상을 위해 매우 필요한 역량이라고 할 수 있다. 이러한 점에 착안하여 본 연구는 심리적 요인(자기통제, 사회지능, 자존감)과 게임 동기, 게임 효능감이 게임 리더십과 어떤 관계를 맺고 있는지를 살펴보고자 했다. 이를 위해 MOBA(Multiplayer Online Battle Arena) 장르를 이용하는 청소년 196명의 데이터를 활용하여 회귀분석을 실시하였다. 분석 결과 인터넷 게임 이용시간, 사회지능, 게임 효능감은 모두 게임 리더십과 정적인 관계를 보이고 있었다. 이와 함께 게임 동기 요인 중 사회성, 탐험 그리고 도피 동기가 게임 리더십과 유의미한 관련이 있는 것으로 나타났다. 그러나 자존감과 자기통제는 게임 리더십에 아무런 영향을 미치지 않았다. 이후 결과를 분석하고 논의하였다.

• 한국응용과학기술학회지
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• 제39권4호
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• pp.527-534
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• 2022

본 연구에서는 초등학교 남자 축구선수들을 대상으로 12주간 근파워 및 민첩성 트레이닝이 체력요인과 등속성근기능에 미치는 효과를 규명하고자 하였다. 이를 위해 초등학교 남자 축구선수 12명을 대상으로 근파워와 민첩성 트레이닝 프로그램 6개를 구성하여 12주간 주 3회 실시하였다. 근파워, 민첩성 트레이닝 전과 후 운동에 대한 체력요인들을 측정하여 분석한 결과는 다음과 같다. 첫째, 근파워의 제자리멀리뛰기에서는 유의한 차이가 나타났다(p<.001). 둘째, 근파워의 제자리높이뛰기에서 유의한 차이가 나타났다(p<.05). 셋째, 민첩성의 사이드스텝에서 유의한 차이가 나타났다(p<.01). 이상의 결과로 12주간의 근파워 민첩성 트레이닝은 초등학교 남자 축구선수들의 순발력과 민첩성 향상에 긍정적 효과를 기대할 수 있으며, 상해 예방과 경기력 향상을 위한 트레이닝 기초 자료를 제공할 수 있을 것으로 판단된다.

• International Journal of Computer Science & Network Security
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• 제22권11호
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• pp.87-92
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• 2022

Today the system of higher education needs significant reforms. Intellectualization of the educational process in HEIs aims to improve the quality of educational services. Intellectual information technologies are information technologies that help a person to accelerate the analysis of the political, economic, social, and technical situation, as well as the synthesis of management decisions. The basis for their mastery is information and communication technologies. The purpose of the research work is to identify the relationship between the introduction of information and communication technologies and the increase in the level of intellectualization of higher education. The article substantiates the expediency of introducing information and communication technologies in order to improve the intellectualization of the educational process in higher education. An empirical study of the variables that characterize the level of intellectualization of higher education through the proposed techniques has been conducted. The tendencies characteristic of pedagogical conditions of implementation of information and communication model in the educational process were revealed. It is proved that the level of intellectualization of higher education depends on the implemented pedagogical conditions. The effectiveness of the proposed information and communication model is also confirmed. Given the data obtained during the study and the low constraints that may affect the results of further research on this issue should focus on the study of other variables that characterize the state of intellectualization of the educational process.

• 한국체육학회지인문사회과학편
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• 제55권2호
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• pp.81-93
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• 2016

본 연구는 보수적인 스포츠인 야구에 도전하는 여성들이 야구 참여로 인해 직면하는 갈등 경험을 분석하고 이러한 갈등을 어떻게 대처하고 있는지를 파악하는데 그 목적이 있다. 이를 위해 여자야구연맹에 등록된 팀에 1년 이상 참가한 동호인 18명을 대상으로 심층면담을 실시하였다. 면담자료는 의미의 범주화, 개념화의 분석과정을 통해 다음과 같은 결론을 도출하였다. 첫째, 여성들의 야구활동 참여로 인한 갈등은 직장과 여가활동의 갈등, 중요타자와 여가활동의 갈등(가족의 반대와 대인관계활동의 단절), 사회문화적 편견과 여가활동의 갈등으로 나타났다. 둘째, 여성 야구 참여자들의 갈등상황의 대처방법은 설득과 타협을 통한 지지세력 만들기, 적극적 대처(나만의 길 및 삶의 우선순위), 회피적 대처(거짓말 및 갈등의 회피)로 구분되었다.

• 복식문화연구
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• 제31권3호
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• pp.296-309
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• 2023

This study gathered basic information on the development of Jiu-Jitsu uniforms suitable for players in Korea. Detailed data were collected between December 20^th and December 30^th, 2022 on 21 selected brands sold in online shopping malls. For each, information was recorded on the production country, product type, price, colors, material, and sizing system. A total of 612 datasets were analyzed using frequency analysis, cross-tabulation, and Chi-square tests. Jiu-Jitsu uniforms were classified as either standard or limited edition. Limited edition uniforms were more expensive than regular uniforms. International brands had a higher price range than domestic brands. The most commonly used colors for Jiu-Jitsu uniforms were the regulation colors associated with the sport: white, black, and blue. Domestic brands were more likely to use non-regulation colors than international brands. The material used for the top half of the uniform was predominantly pearl weave, while the bottom half was usually ripstop. International brands used a more diverse range of materials than domestic brands. The Jiu-Jitsu uniform sizing system incorporated a range of sizes between A00 and A6. While sizing designations differed according to the established sizing systems of different countries, the sizes remained the same, as did the range of sizes available. Where size guides were provided, height and weight were used to help the customer determine the appropriate size. The dimensions of each size varied between brands. Overall, we found that international brands offer a more diverse range of Jiu-Jitsu uniform designs than domestic brands.