• 건강소식
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• v.34 no.5
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• pp.32-33
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• 2010

산에서 자전거를 탄다? 일반 도로에서 자전거를 타는 것조차 부담스러운 이들에게는 정말이지 먼 세상의 이야기처럼 들릴지도 모른다. 하지만 연령이나 성별의 제한 없이 누구든 즐길 수 있으며, 혼탁한 도시를 벗어나 탁 트인 자연환경을 벗 삼아 즐길 수 있는 짜릿한 무공해 스포츠라면? 게다가 어렵게 도달한 정상엣 하산할 때 묘한 쾌감을 느낄 수도 있는 전신운동에다 심폐기능 향상에도 도움이 된다면 어떤가? 구미가 당기지 않는가? 바로 산악자전거 얘기다.

• Korean Journal of Environment and Ecology
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• v.25 no.5
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• pp.799-813
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• 2011

Increasing mountain biking (MTB) in forest recreation areas is changing the behavioral patterns in the areas where hiking has been a dominant activity, and it may cause ecological and social impacts to the areas. This study examined hikers' perceived conflicts by MTB including the relationship between socio-demographic and visiting characteristics and perceived conflict. On-site survey was conducted in Mudeungsan Provincial Park (MPP), Korea, during September, 2010. Out of 388 hikers participated in the survey, 374 responses were used for data analysis. 30.2% of the respondents encountered or saw MTB (avg.: 1.7 times) in MPP. Overall, 77.1% of respondents thought MTB in MPP was a problem. 73.5%~83.2% of respondents perceived conflict by four major MTB behaviors (e.g., too fast running MTB in trails; MTB bikes occupying trails; MTB bikes passing by hikers too closely; MTB bikers doing unpleasant behaviors to hikers). Based on the type of conflict, 48.5~62.4% of respondents fell in the type of "social values conflict (SVC)", 11.1~32.4%, "interpersonal conflict (IC)", and 16.8~26.6%, "no conflict (NC)", respectively. Types of conflicts were related with sociodemographic (e.g., gender, age, education) and visiting characteristics (e.g., number of visits, experience of encountering MTB). Such relationships were nonexistent in most cases when the "experience of encountering MTB" was controlled.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2013.05a
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• pp.206-206
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• 2013

산악자전거 서스펜션 포크 프레임의 소재 개발을 위해 Si, Mn, Mg, Cr, Zn 원소의 첨가량을 조정한 500MPa 인장강도를 가지는 압출성형과 용접성이 우수한 알루미늄 합금을 개발하였다. 개발한 고비강도 경량 알루미늄합금 위에 고경도, 고기능성과 같은 우수한 기계적 물성을 가진 TiN 박막을 Arc ion plating 공정으로 코팅하여 알루미늄합금의 내부식성, 내구성을 향상시켰다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.529-533
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• 1995

안장은 인체하중이 집중되고, 자전거의 충격과 진동이 직접 전달되는 부위로서 주행 안락도를 높이고 buttock의 discomfort를 감소시킬 수 있도록 설계되어야 한다. 본 연구의 목적은 인체곡면을 본뜬 안장형상 설계를 통하여 buttock의 국부적 discomfort를 감소시키고자 하는 것이다. 인간의 앉은자세에 대한 해부학적 고찰을 통해 좌골결절(Ischial Tuberosity)과 치골결합면(Symphyseal Surface)이 안장과 직접 맞닿는 면으로 파악되었으며, 이들 부위에 대한 집중적 개선이 이루어져야 할 것으로 제안되었다. 문헌조사를 통해 의자설계시 고려해야 할 인체치수 및 지침을 파악하였으며, 안장과 의자의 기능비교를 통해 이를 선별적으로 적용하였다. 인체곡면 측정을 위해 Rod Matrix(3cm 간격, 13*20)방법을 이용하여 10명의 buttock contour를 측정하였으며, 측정된 자료를 분석하여 안장의 곡면형상을 결정하였다. General Comfort Rating, Body Part Discomfort 등의 주관적 안락도 평가방법을 통하여 기존 자전거 안장과 본 연구를 통해 개발된 안장을 비교 평가한 결과, 전반적인 안락도의 향상과 좌골결절 및 치골 결합부의 discomfort 감소효과를 가져온 것으로 파악되었다.

• Transactions of the Korean Society of Automotive Engineers
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• v.20 no.4
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• pp.133-141
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• 2012

This study investigates structural and fatigue analyses of bike brake. Maximum equivalent stress of the model of mountain bike is 4 times as much as the model of general bike at static analysis. In cases of mountain and general bikes, maximum damage frequency at load of 'SAE bracket history' with the severest change of load becomes as much as 16 times than the most stable load of 'Sample history' among the nonuniform fatigue loads. In case of mountain bike, the possibility of maximum damage becomes 3% at the load of 'Sample history' with the average stress of 0 to $-3{\times}10^4$MPa and the amplitude stress of 0 to $10^4$MPa. In case of general bike, the possibility of maximum damage becomes 3% at the load of 'Sample history' with the average stress of 0 to $-0.8{\times}10^4$MPa and the amplitude stress of 0 to $0.2{\times}10^4$MPa. This stress state can be shown as 5 to 6 times more than the damage possibility of 'SAE bracket history' or 'SAE transmission'. The analysis result of this study can be effectively utilized for the safe design of bike brake.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2010.04a
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• pp.163-164
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• 2010

In this paper, the plan to invigorate regional marine tourism is discussed. The southwest area of Jeonnam province is famous for its beautiful islands and seashore line which has richness and variety of marine life. A solution of tourists increment by leisure sports utilizing islands and coastline will be proposed MTB tournament held at islands that has historic backgrounds and scenic beauty and its effect on influx of tourist were tracked first. Next application of mud flats boot around seaside and connection with experience program of seaside village were also examined. These activities will contribute to development of marine tourism and increase of income for regional people.

• Journal of Forest and Environmental Science
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• v.20 no.1
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• pp.28-39
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• 2004

This study was carried out to find new perspective of forest recreation program in Gangwon-do. Gangwon-do has now 19 forest recreation sites (national forest 11, public forest 4, private forest 4) where forest interpretation, mountain bike, mountain marathon, mountain ski, forest music concert, various forest class are held. In order to develop the new programs for forest recreation program in Gangwon-do, this study considered culture program, welfare program and education program. For culture program, the experience program in traditional house, the experience in the back region and the experience in special product of mountain village were suggested. For welfare programs, the welfare programs for the old and the handicapped were shown. For education program, forest global village program and personality program were devised. According to introduction of 5 day-work per week, the population for recreation are expected to strongly increase, so Gangwon-do representing the image of tour province should improve continuous concern and various developing programs for forest recreation.

• The Journal of the Korea Contents Association
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• v.13 no.5
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• pp.451-458
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• 2013

In this paper, we have developed an intellectual sizing and fitting system for bike user. In order to prevent the disease, we should adjust the bike's frame and select several components in the body size. Then it propose an extractions algorithm of avatar imagination with the cromakey method and realize the sizing and fitting.

• Journal of Agricultural Extension & Community Development
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• v.26 no.2
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• pp.85-97
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• 2019

The conflict management of forest recreation, especially conflict management between hikers and MTB users, has drawn much attention as one of major issues in forest policy making. The main purpose of this study was to investigate hikers' conflict perception against MTB users and their attitudes toward the necessity of conflict management actions, and to identify factors influencing those attitudes. The research data were collected through online surveys of 644 men and women hikers who are aged 20 or older and not participating in MTB riding. The major findings of this study can be summarized as follows: First, the levels of goal interference and social value conflicts against MTB users were not so high, but rather, the awareness level of compatibility was much higher than that of conflict, and hikers' awareness level of safety risks posed by MTB users was also considerably high. Second, hikers' attitudes toward the necessity of conflict management actions were generally shown to be considerably positive, but those attitudes toward indirect management actions such as information, education, and compliance with norms of conduct, were significantly positive than those attitudes toward direct management measures such as zoning, enforcement, and regulations. Finally, the results of the multiple regression analysis showed that four factors that most significantly affect hikers' attitudes toward direct or indirect conflict management actions are behavioral norms conflict, safety risk, compatibility and age. Safety risks had most important influence on hikers' attitudes toward the direct management actions, but behavioral norms conflicts had most important influence on indirect management actions.

• Journal of the Korean Society of Safety
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• v.28 no.3
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• pp.1-5
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• 2013

In order to evaluate fatigue endurance for an MTB(mountain bike) frame, FEM(finite element method) analysis was performed. For evaluating the fatigue endurance of the MTB frame, the S-N data for Al-6061 fillet weldment were compared with the stress analysis results through FEM analysis of the frame. Three loading condition, pedalling, horizontal and vertical loading conditions were considered for fatigue endurance evaluation. Horizontal loading(+1200 N) condition was found to be the most severe to the frame. The maximum von Mises stress of the frame under horizontal loading(+1200 N) condition was determined 294 MPa through FEM analysis of the frame. Conclusively, on the basis of fatigue strength of 200 MPa at the number of cycles of 50,000, the MTB frame has an improper safety factor of approximately 0.25, suggesting that this frame needs reinforcement.