• 제목/요약/키워드: bike

검색결과 237건 처리시간 0.028초

Prediction of the number of public bicycle rental in Seoul using Boosted Decision Tree Regression Algorithm

  • KIM, Hyun-Jun;KIM, Hyun-Ki
    • 한국인공지능학회지
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    • 제10권1호
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    • pp.9-14
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    • 2022
  • The demand for public bicycles operated by the Seoul Metropolitan Government is increasing every year. The size of the Seoul public bicycle project, which first started with about 5,600 units, increased to 3,7500 units as of September 2021, and the number of members is also increasing every year. However, as the size of the project grows, excessive budget spending and deficit problems are emerging for public bicycle projects, and new bicycles, rental office costs, and bicycle maintenance costs are blamed for the deficit. In this paper, the Azure Machine Learning Studio program and the Boosted Decision Tree Regression technique are used to predict the number of public bicycle rental over environmental factors and time. Predicted results it was confirmed that the demand for public bicycles was high in the season except for winter, and the demand for public bicycles was the highest at 6 p.m. In addition, in this paper compare four additional regression algorithms in addition to the Boosted Decision Tree Regression algorithm to measure algorithm performance. The results showed high accuracy in the order of the First Boosted Decision Tree Regression Algorithm (0.878802), second Decision Forest Regression (0.838232), third Poison Regression (0.62699), and fourth Linear Regression (0.618773). Based on these predictions, it is expected that more public bicycles will be placed at rental stations near public transportation to meet the growing demand for commuting hours and that more bicycles will be placed in rental stations in summer than winter and the life of bicycles can be extended in winter.

Testing Differences of Leisure Satisfaction by Demogrpahic Characteristics of MTB participants

  • MOON, Bo Ra;LEE, Hwan Yeol;SEO, Won Jae
    • Journal of Sport and Applied Science
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    • 제3권1호
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    • pp.27-34
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    • 2019
  • Purpose: Mountain biking as a sport and recreational activity has grown rapidly over the previous two decades. The purpose of this study is to analyze differences of leisure satisfaction by demographic characteristics of mountain bike participants. Research design, data, and methodology: To accomplish the purpose, the study employed purposive sample method among nonprobability sampling and collected data from 300 participants. Of collected data, 288 responses were analyzed excepted for uncompleted responses. To analyze data, study utilized statistical techniques including descriptive statistics, reliability analysis, independent-sample t-test, and one-way ANOVA, and to verify difference between individual groups in relation to significant results, Duncan's multiple range was conducted. Results: Findings indicated no differences of leisure satisfaction by gender. Similarly, education level and occupations have not influence leisure satisfaction. Yet, differences of leisure satisfaction by participation frequencies were observed. Of participation frequencies, participants riding 5 times a week were more satisfied with MTB participation than the other groups participating less 3 times a week. Conclusions: The findings provide a couple of insights in terms of promoting MTB participation. In specific, results indicated that MTB would be attractive sports that is able to appeal huge populations regardless of their education and occupation. Furthermore, consistent participation is judged an effective way to increase psychological, educational, and social satisfaction. In this sense, regional MTB clubs could play a salient role in motivating riders to more participate in MTB. Hence, establishing strategies for encouraging club activities are needed.

신월정수장을 재활용한 서서울호수공원 설계 (Design of West Seoul Lake Park in Reusing the Sin-Wol Filtration Plant)

  • 최신현
    • 한국조경학회지
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    • 제37권5호
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    • pp.24-30
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    • 2009
  • 일반인들의 접근이 통제되며 도시의 기반시설의 역할을 하던 신월정수장은 서남권의 대표적인 테마체험형 공원으로 조성된다. 도시민에게 휴식공간을 제공할 뿐 아니라 정수장이라는 특수한 기존 성격을 공원 조성에 적극적으로 반영하여 재활용함으로써 도시공원의 새로운 모델을 제시한다. 주변 도시구조와의 단절로 인한 밀집된 주거지의 다양한 요구를 수용할 수 없는 공간구조를 가지고 있으며, 도시속의 섬처럼 떠다니고 있다. 중요한 자원 요소인 숲을 공원의 한 요소로 생각하고 적극적으로 주변 도시구조와 연결하였으며, 도시 공원의 경계를 열고 확장하여 도시민들의 다양한 요구를 수용하고 변화에 유연하게 대처할 수 있는 공원구조를 제안하고자 한다. 장소와 재료를 활용한 계획으로는 기존의 침전조는 몬드리안 정원으로 여과조는 문화센터로 기존연못은 생태적 연못과 소리분수로 기존관사지역은 열린풀밭(Open Green Field)으로 설계하였다.

강원도(江原道) 자연휴양림(自然休養林) 프로그램의 방향(方向) 모색(摸索) (New Perspective of Forest Recreation Program in Gangwon-do)

  • 이용규;최정기
    • Journal of Forest and Environmental Science
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    • 제20권1호
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    • pp.28-39
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    • 2004
  • 본 연구는 강원도 내 자연휴양림의 프로그램의 현황을 파악하여 향후 자연휴양림의 발전 방향을 모색하고자 실시하였다. 2003년 현재 강원도는 19개소의 자연휴양림(국유림 11 개소, 공유림 4개소, 사유림 4개소)을 조성 운영하고 있으며, 현행 시행되고 있는 프로그램으로는 숲해설, 산악자전거, 산악 마라톤, 산악스키, 숲속 음악회, 숲교실 등이 시행되고 있는 것으로 나타났다. 본 연구에서는 강원도 자연휴양림 프로그램의 새로운 방향을 위해서 문화 복지 교육 프로그램을 축으로 하여 발전 방향을 모색하였다. 문화 프로그램으로는 "전통가옥체험 프로그램", "오지체험 프로그램", "산촌 특산물 프로그램"을 구상하였으며, 복지 프로그램은 "노인복지프로그램"과 "장애인 복지 프로그램"을, 교육프로그램으로는 "숲속의 지구촌 교류" 프로그램 조성과 "인성교육 프로그램"을 제시하였다. 앞으로 주 5일 근무제 도입으로 휴양수요가 대폭적으로 증가할 것으로 예상되므로 관광 강원도의 이미지를 부각시키기 위해서 자연휴양림의 지속적인 관심과 다양한 프로그램 개발이 더욱 증진되어야 할 것이다.

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청소년(靑少年) 문화(文化)가 스트리트 패션에 미친 영향(影響) - 1960년대(年代)를 중심(中心)으로 - (The Influence of the Youth Culture on the Street Fashion - On the Focus in 1960s -)

  • 간문자
    • 패션비즈니스
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    • 제2권1호
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    • pp.35-48
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    • 1998
  • The purpose of this paper is to examine the street fashion, which is influenced by the youth culture in 1960s. Youth culture is the youth subculture which appeared multiform in the 1960s. It tried to create a new culture by subverting the ruling class culture with their combative life style and peculiar appearance which are distinguished from mother culture. Youth cultures as youth subculture are symbolically expressed in their style which had strong characteristics of sub-fashion and anti-fashion, and which are different from mother fashion in shape. Therefore youth subculture fashion had an effect on street fashion in the 60s. The influence that the youth culture fashion had had on the street fashion is summarized as follows: Beats fashion was intelligency look on black dress, black polo-neck shirts, black trousers, black glasses and heavy black eyeliner. Mods fashion was neat style on Edwardian suit with narrow trousers, pointer-toeshoes and smooth croped hair. Folkis fashion was ethnic look, middle east asian look, peasant look, Indian style, south america look, gypsy style, natural materials, natural dying, tie-dye, beads and hand made ornaments. Rockers fashion was violence appearance categorized 'blue collar' on black leather jacket decorated with metal studs and hand-painted insignia, blue jeans and boots for motor bike. Swinging London & the Psychedelics fashion was blend mods look with pschedelic color and motive pattern. Hippie fashion was intermix pschedelic and natural or ethnic style. It was appear to be a meaningless, unpredictable assortment of diverse items and style. Faded and tattered jeans, army jackets, vintage hat, beads, embroidered headband, white sheets, diverse theatrical costumes, sandals or bare feet, granny dress, peasant blouse, blanket cape, tie-dye T-shirts and long hair. Greasers fashion was adorned black leather jacket with chains, fringing, badges, insignia and sleeves had been crudely ripped off. They came to be known wore jeans so soaked with oil. Skinheads fashion was aggressive working class identity with donkey jacket, jeans rolled up, collarless union shirts, heavy boots, braces and hair cropped short.

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단신 : 사이클 피팅을 위한 전동 승차 조절기 개발 (Technical Note : Development of Electric Riding Machine for Cycle Fitting)

  • 배재혁;최진승;강동원;서정우;탁계래
    • 한국운동역학회지
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    • 제22권3호
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    • pp.373-378
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    • 2012
  • The purpose of this study was to develop an electric riding machine for cycle fitting to control riding posture easily, to measure frame size quantitatively, and to overcome disadvantages of the traditional systems. The electric riding machine consisted of actuator, load controller, and display & control unit. The actuator unit by BLDC(BrushLess Direct Current) motor drives the saddle height up and down, the crank forward and backward, the handlebar up and down, and the handlebar forward and backward. The load controller unit controls loads by Eddy current controller with electromagnet and aluminum circular plate. The display & control unit consisted of frame size controller and display panel which shows top tube length(485~663mm), head tube length(85~243mm), seat tube length(481~671mm), and seat tube angle($62.7{\sim}76.4^{\circ}$). The range of frame size control for developed electric riding machine did not have difference compared to traditional commercial systems, but quantitative and precise control with 0.1 mm length and $0.1^{\circ}$ angle was possible through digital measurement. Unlike traditional commercial systems, frame size control was possible during riding through motor driven method, thus fitting duration decreased. It is necessary for further improvement to have feedback from users. It is believed that developed electric riding machine can help to develop domestic fitting system.

개인이동형 교통수단(PM) 유형별 사고특성 및 위험도 비교연구 (A Comparison Study on the Risk and Accident Characteristics of Personal Mobility)

  • 이수일;김승현;김태호
    • 한국안전학회지
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    • 제32권3호
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    • pp.151-159
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    • 2017
  • This study deals with characteristics and risk of a PM based on user survey result, road driving test and data analysis of PM accident. Text mining method is applied to extract PM accident data from Big Data, which are claim data of private insurance company. Road driving test and survey on safety, convenience, noise, overtake ability, steering ability, and climbing ability of PM are performed to evaluate user's safety and convenience considering domestic road condition. As the result of claim data analysis, annual average increase rate of PM accident is 47.4% and average compensation of personal mobility is higher than that of bicycle by maximum 1.5 times. 79.8% of PM accident is self-caused accident due to unskilled driving and age-specific diagnosis rate of driver over 60 is higher than that of under 60. Diagnosis rate of over 60 at lower limb, foot, rib and spine is especially higher than that of under 60. As the result of road driving test and user survey, satisfaction level on safety and convenience of PM is evaluated as close to that of bicycle and satisfaction level of PM is increased after boarding. Overtake ability, steering ability, and climbing ability of PM are evaluated as same or better than that of bicycle but warning equipment to pedestrian or bike such as horn is required because noise level of PM during driving is too low. Finally, user survey result shows that bicycle road is suitable for PM and safety standard, advance-education and insurance are required for PM. It is suggested that drivers' license for PM can be replaced by advance-education. Results of this study can be used to prepare safety measures and legal basis for PM operation.

최대 다이버시티 이득을 획득하는 새로운 full-rate 시공간블록부호들 (New full-rate space-time block codes with full diversity)

  • 정지용;남궁호영;정태진;김철성
    • 한국통신학회논문지
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    • 제30권8C호
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    • pp.762-768
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    • 2005
  • 본 논문은 QAM 변조방식과 준정지(quasi-static) Rayleigh 페이딩 채널 환경에서 3이상의 임의의 송신안테나를 사용할 경우 추가로 주파수 대역을 사용하지 않고 최대 다이버시티 이득을 획득하는 새로운 시공간블록부호들을 제안한다. 이 제안된 부호들은 기존의 A-ST-CR 부호$^{[6,7]}$와 같이 성상 회전 선부호기$^{[4,5]}$와 Alamouti 부호$^{[3]}$ 적절히 직렬 연접하여 구성된다. 전산 실험 결과, 제안된 부호는 ST-CR 부호$^{[4,5]}$보다 높은 코딩이득을 획득하며, QPSK 변조방식과 3, 4, 5개의 송신 안테나 개수를 사용할 경우 평균 심벌오율 $10^{-5}$에서 기존의 ST-CR $^{[4,5]}$보다 각각 약 1.3dB, 1.4dB 그리고 1.5dB의 코딩 이득의 성능 향상을 보이고, 16-QAM 변조방식과 3개의 송신 안테나 개수를 사용할 경우 약 3dB의 성능 향상을 보인다.

자전거 신호등의 신호변환시간 산출에 관한 연구 (A Study for Minimum Requirements Time of Bicycle Signal Clearance Interval)

  • 주두환;여운웅;현철승;박부희;이철기;하동익
    • 한국ITS학회 논문지
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    • 제9권5호
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    • pp.59-66
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    • 2010
  • 최근 서울시를 비롯한 대도시를 중심으로 자전거 전용도로가 설치되면서 자전거 이용자가 급증하는 실정이며, 이에 따라 보행자와 자전거, 자동차와 자전거간의 상충이 빈번한 실정이다. 이를 해결하기 위해서 자동차/자전거/보행자를 시 공간적으로 분리해주는 자전거 전용신호이 도입되었다. 그러나 자전거의 경우, 자동차와 속도 등의 특성이 상이하므로 자전거 이용자를 위한 별도의 신호변환시간이 필요하다. 본 논문에서는 AASHTO에서 제시한 자전거 신호등의 신호변환시간 산출공식을 이용하여 자전거의 평균속도 및 감속도 등을 현장실험을 통해 별도로 도출하여 우리나라 실정에 맞는 자전거 신호등의 신호변환시간을 제시하였다. 결과적으로, AASHTO에서 제시한 감속도값 2.0m/sec2이상의 값은 자전거 이용자의 급정지에 해당하는 값에 해당하므로 도로여건 등을 고려하여 가급적 적용하지 않는 편이 타당한 것으로 분석되었다.

HTML5와 헬스자전거를 이용한 사용자 체감형 스마트TV Application 개발 (Implementation of Smart TV Application using HTML5 and Health Bicycle)

  • 박진태;황현서;문일영
    • 한국항행학회논문지
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    • 제18권1호
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    • pp.101-106
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    • 2014
  • 스마트TV는 2000년대 초 등장한 스마트폰과 더불어 새로운 산업시장을 형성하고 있다. 스마트폰의 등장과 IT기술의 발전으로 사용자들은 더욱 만족도가 높은 애플리케이션을 추구한다. 스마트폰은 다양한 애플리케이션으로 사용자들의 요구를 충족하고 있지만 스마트TV는 사용자의 요구를 반영한 애플리케이션의 부재로 발전의 저하를 초래하고 있다. 스마트TV가 대중화 되고, 사용자의 요구를 충족시키기 위해서는 고사양의 애플리케이션이 아닌 스마트TV가 스마트하다고 느낄 수 있는 접근이 필요하다. 그러므로 본 논문에서는 최신 IT기술을 이용하여 스마트TV 애플리케이션을 제안한다. 이는 스마트TV, 스마트폰, 헬스자전거를 하나의 시스템으로 연동하여 사용자에게 실제 거리를 주행하는 것과 같은 느낌을 제공한다. 이를 위하여 Web OS, HTML5 웹 소켓, 안드로이드 기술을 이용한다.