• The Research Journal of the Costume Culture
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• v.24 no.6
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• pp.788-802
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• 2016

Sportswear transforms itself into a new fashion item to satisfy desires for beauty in addition to having functionality and movability for sports activities. Sportswear is not in fashion just temporarily but comes in various forms along with sociocultural phenomenon that put emphasis on well-being and leisure. This research aims to study the needs of the bikers who ride bicycles or cycles has become a popular outdoor activity, and give suggestions for high functional sports design that can satisfy the needs of the highly demanding taste of athletes. To understand the design development direction and design preference, practical consumer needs were derived through a survey analysis on bike wear purchasing satisfaction and actual wearing state by bike riders. For consumer needs analysis, focus group interview, in-depth interview and questionnaire method were used. Based on analysis of those researches, athleisure bike wears appropriate for urban sports activities were categorized into sports, life, fitness and leisure 4 styles for athleisure bike wear design development. It is believed that this study will contribute to in the category expansion of sports wear market and satisfy the consumer demands for functional and specialized casual bike wears as well as fashion factors optimized to life style of modern people.

• Journal of Digital Convergence
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• v.16 no.4
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• pp.299-306
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• 2018

This study is to measure traveling experience of bike riders whom going long distance trip. Bike paths and bike riding are crucial element for modern people's life style. At the same time, a bicycle trail is being developed by the National Bicycled-Oriented Chair Plan, which was established in 2009 by the National Bike Policy Master Plan. 13 million bike riders in Korea is keep on trying the long distance bike trip and its number is increasing every year. Accordingly, the Ministry of Public Administration and Security decides to promote the convenience of riders by developing bicycle app for long distance rider. The study attempted to assess usability of this app with 39 bike applications whom currently using the bike application. Afterwards, the researchers tests 11 hypotheses through in-depth interviews of six activated members. In sum, Bicycle travelers should be provided with bike trail guidance based on theme section skill, provided in-time speed distance related information, communicated with other bike riders, given tips for bike supplies and maintenance, and provided English language service. The study hopes to help find a customized service for bike travelers.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.33 no.5
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• pp.1989-1998
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• 2013

As the importance of 'bike revitalization' has been emphasized in our society, many cities around the world put enormous efforts to create a bike-oriented transportation system. None the less, the results were not much productive and effective. In this study, to decide the location and number of the bike-parking facilities, the heuristic P-median algorithm has been applied with and without budget constraints. A test network with 30 candidate locations (centroids) were employed. The results show that the optimum number of bike parking lots with and without the budget limits are 9 and 20, respectively. Since the optimum locations determined in this study were congruous with the actual bike parking lots with high utilization rates, it is expected that the proposed methods can be applied for determining the optimum locations of the bike parking facilities elsewhere. Some limitations and future research agenda have also been discussed.

• The Korean Journal of Applied Statistics
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• v.33 no.6
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• pp.739-751
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• 2020

Seoul public bike program facilitates access to bicycles and offers potential for greater mobility and health for users. Furthermore, it would have positive impacts on transport congestion, energy use, and the environment. Hence, it is important to find future rental locations by taking to account both bike-demand and regional imbalance. This paper first finds eligible candidates of rental locations with the required spatial conditions such as a sufficient sidewalk width and accessibility of bike pick-up vehicles. And then, estimates public bike daily usage for each selected location via random forest based on Seoul public bike historical usage, Seoul geographical features, regional characteristics, and populations. This study contributes to a better comprehension of the Seoul public bike program, and would be useful in determining new public bike rental locations.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2012.05a
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• pp.34-35
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• 2012

• Proceedings of the KIPE Conference
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• 2016.07a
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• pp.339-340
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• 2016

본 논문에서는 E-bike 구동을 위한 Boost 컨버터의 배터리 전류 제한 기법에 관해 제안한다. Boost 컨버터를 E-bike에 적용할 경우, 기동 시 큰 전류를 보충하기 위해 출력 단에 Super Capacitor가 사용된다. 이로 인해 생기는 입력 단의 Inrush 전류는 회로 구성 소자의 파손 문제를 발생시킬 수 있다. 그 뿐만 아니라, 배터리 입장에서의 Inrush 전류 및 모터 기동 시 순간의 큰 전류는 자체적 손상 및 수명 저하 문제를 야기한다. 상기 문제를 해결하기 위해 본 논문에서는 E-bike 적용 배터리의 수명 연장을 위한, 배터리 전류 제한 제어 기법을 제안한다. 컨버터 입력 전류인 배터리 전류를 제한함으로써, 큰 전류에 의한 소자 파손 및 배터리의 안정성 문제를 해결하였으며, 이를 통해 배터리의 수명을 연장이 가능하였다. 이를 모의실험 및 실험을 통해 타당성을 검증하였다.

• Proceedings of the KIPE Conference
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• 2003.07a
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• pp.243-246
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• 2003

This paper presents a new motor design well suited for an advanced exercise bike. The advanced exercise bike setup high demands for performance and physical dimensions, which is high torque, wide speed range and a diameter/length ratio around 5. These requirements makes the new motor design called an E-core Transverse Flu Machine (ETFM) vev interesting because the segmented design of the stator and rotor poles enables high diameter without increasing the flux-path and since the ETFM is similar to the switched reluctance motor, high torque and wide speed range is possible. The design of the ETFM can be peformed using a developed design program, which is also introduced in the paper. A prototype of the exercise bike with the ETFM and a classical H-bridge converter with analog current control is constructed for verification of the concept.

• Transactions of Materials Processing
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• v.22 no.1
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• pp.42-47
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• 2013

The bicycle is one of the most important eco-friendly transport methods which can mitigate global warming. The portability of a bike on public transportation systems is essential for the wide spread use of bicycles by people in urban environments. In this study, a lightweight urban folding bike was developed with careful consideration of the association with public transport. A folding frame using a moving slide link mechanism made from AL6061 is proposed. Numerical analysis was conducted to evaluate structural safety of the bike in both vertical and pedal loading tests. The proposed urban folding bicycle weights only 10kg and summation of its width, length, and height in the folded configuration is under 158cm.

• 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 the Korea Academia-Industrial cooperation Society
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• v.14 no.3
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• pp.1011-1015
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• 2013

The demand of bike increases eco-friendly as the mean of transportation but domestic production basis becomes sluggish. In this study, the design analysis of horizontal and vertical frame is performed on the model which is proposed as the bike of new concept in conjunction with public transport system. As the result, the structural analysis is conducted on the main frame of urban bike used with cast magnesium alloy. As the vertical load of 150 kg is applied, the design technology insures that maximum stress less than 70 MPa is obtained.