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김재준(Jae-Jun Kim),김경(Kyung Kim),신선혜(Sun-Hye Shin),유창호(Chang-Ho Yu),정구영(Gu-Young Jeong),오승용(Seung-Yong Oh),권대규(Tae-Kyu Kwon) Korean Society for Precision Engineering 2011 한국정밀공학회지 Vol.28 No.12
In this paper, we assessed muscular activities of lower limbs and foot pressure for car and bus drivers according to operating three electronic pedals that we developed. To analyze drivers’ physical exhaustion, muscular fatigue of lower limbs was evaluated. Eleven car drivers and six urban bus drivers were participated in this experiment. The virtual driving system was used for the real driving environment. The virtual driving system was comprised of a spring seat, a steering wheel, pedals (clutch, excel and brake pedals), a manual transmission and a virtual driving simulation. For the real vibration like situation on the road, six degree of freedom motion base system was used. Measured muscles were rectus femoris (RF), biceps femoris (BF), tibialis anterior (TA) and gastrocnemius (Gn) muscles. For the quantitative muscular activities, integrated electromyography (IEMG) was analyzed. Muscular fatigues also were analyzed through the analysis of the median frequency. In addition, foot pressures were analyzed and compared through the peak and averaged pressure during the operating three developed electronic pedals. The experiments are conducted with total 17 drivers, 11 general public and 6 drivers. As a result of the analysis, electromyogram and fatigue analysis through intermediate frequency reduction for pedal-1 more efficient than other pedals. And foot pressure also was decreased. Consequently, we suggested the most efficient pedal and method to minimize the amount of cumulative fatigue.
김재준(Jae Jun Kim),김경(Kyung Kim),유창호(Chang Ho Yu),오승용(Seung Yong Oh),이찬기(Chan Ki Lee),김동원(Dong Won Kim),황봉하(Bong Ha Hwang),문영주(Young Ju Moon),정구영(Gu Young Jeong),권대규(Tae Kyu Kwon) Korean Society for Precision Engineering 2012 한국정밀공학회지 Vol.29 No.10
In this study, we proposed the most efficient driving posture based on the analysis of quantitative muscular strength and fatigue degree according to posture. Since driving include complicated actions required by a variety of ability and cause by extremes concentration or strain, drivers tend to feel tired easily. However, drivers cant recognize the fatigue degree by themselves. Moreover, the method for measuring the quantitative fatigue degree exactly is quite difficult to be secured. 9 professional bus drivers were participated. We analyzed the quantitative legs muscular strength when operating each pedal. And then we also analyzed the muscular strength and muscular fatigue degree according to driving pattern during bus driving. Therefore, we suggested the most efficient driving posture.
김재준(Jae-Jun Kim) 한국산림휴양학회 2009 한국산림휴양학회지 Vol.13 No.4
본 연구는 4개 유형의 산림휴양공간을 대상으로 이용객의 방문 동기요인(push factor)와 이들 산림휴양공간의 방문 유인요인(pull factor)을 도출하고, 방문요인과 유인요인간의 관계규명을 통해 산림휴양공간별 방문선택에 영향을 미치는 요인 파악과 더불어 산림휴양공간별 관리방안 수립의 기초 자료를 제공하고자 수행되었다. 분석 결과 동기요인으로는‘문화 · 자연체험’, ‘성취감’, ‘일탈성’, ‘시간선용’, ‘사회성’등 모두 5개 요인이 도출되었으며, 유인요인으로는‘문화 및 자연자원’, ‘접근성’, ‘편익시설’, ‘체력단련 및 저비용’의 4개 요인이 도출되었다. 이들 동기요인과 유인요인간의 상호 연관성을 통계적으로 분석한 결과 동기요인과 유인요인은 상호 관련이 있는 것으로 나타났다. 이러한 유인요인을 기준으로 동기요인들과의 관계를 살펴보면, 국립공원의‘문화 및 자연자원’유인요인은‘문화·자연체험’, ‘성취감’, ‘사회성’동기에 양(+)의 영향을 받는 것으로 나타났으며, 자연휴양림의‘편익시설’유인요인은 ‘시간선용’, ‘문화·자연체험’등 동기요인에 의해 영향을 받는 것으로 나타났다. 한편, 도시림(산림욕장)의‘접근성’ 유인요인은‘일탈성’및‘시간선용’동기에 양(+)의 영향을 받는 반면, ‘성취감’, ‘사회성’동기에서는 음(-)의 영향을 받는 것으로 나타났다. This study, as a basic survey of management planning for the forest recreations, aimed to identify the push and pull motivators of visitors to the forest recreational area. From four-type forest recreational areas, the nature and extent of the reciprocal relationships between the push and pull factors, were examined as well. As results, five factors, culture and nature experience, sense of accomplishment, escape(deviance), good use of time, and communion, were derived from seventeen push items.ms.ur factors, cultural and natural reactors,, accs,sibltuty, convenience facltutis,, and futns,s and low cost, were derived from twenty pull items.mThe push and pull factors were statistically well correlated and regreased each other. From the relationships between the push and pull factors, pull factors of cultural and natural reactors, in relatal en ks were positively affected on the culture and nature experience, sense of accomplishment, and communion. Pull factors of convenience facltutis, in recreational forests were affected on the good use of time, cultural and nature experience. Finally, pull factor of accs,sibltuty for the urban forests(strolling thrctgh the woods) affected positively on the motivations of escape(deviance) and good use of time, but it did negatively on the sense of accomplishment and communion motivations.