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차량 Ad-hoc 네트워크에서 이동성에 따른 RTS/CTS 성능 분석
장상우(Sang-Woo Jang),정성대(Sung-Dae Jung),김상헌(Sang-Heon Kim),이상선(Sang-Sun Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper shows the performance analysis of the vehicle to vehicle communication within the high mobility environment for IEEE 802.11 which has not been analyzed and improved for the performances of the high mobility vehicle environments yet. To analyze the performance, WAVE(Wireless Access in Vehicular Environments) based IEEE 802.11 vehicle to vehicle Ad-hoc network is simulated using QualNet simulator. Moreover, with considering the practical vehicle mobility on a road, the communication performances are analyzed along the existence and nonexistence of the RTS/CTS(Request to Send/Clear to Send) with various relative velocities between each vehicle.
여성에어로빅스 운동참가자의 자존감, 신체적-자기지각과 운동지속의도와의 관계
장상우(Sang-Woo Jang),김동아(Dong-A Kim) 한국엔터테인먼트산업학회 2012 한국엔터테인먼트산업학회논문지 Vol.6 No.3
본 연구는 여성 에어로빅스 운동참가자의 자존감이 신체적 자기-지각과 운동지속의도의 관계를 규명하는데 목적이 있다. 이 목적을 규명하기 위하여 서울특별시 및 경기도에 소재하고 있는 공공 및 사설 스포츠센터에서 에어로빅스 운동 프로그램을 지속적으로 참가하고 있는 성인 여성들로 선정 총 500명을 대상으로 총 400부를 회수하였고, 그 중 366부가 분석에 사용되었으며, SPSS 12.0 Windows 프로그램을 사용하여 설문지의 타당도를 검증하기 위하여 탐색적 요인분석(exploratory factor analysis)을 실시하고, 신뢰도검사, 빈도분석, t-검증, 그리고 중다회기분석(multiple regression analysis)을 실시하여 다음과 같은 결론을 얻었다. 첫째, 여성 에어로빅스 운동참가자의 자존감이 높을수록 신체적 자기-지각이 높게 나타났다. 둘째, 여성 에어로빅스 운동참가자의 긍정적 자존감이 높을수록 운동지속의도가 증가하였다. 셋째, 여성 에어로빅스 운동참가자의 신체적 자기-지각 요인 중 스포츠 유능감이 강할수록 운동지속의도에 부적인 영향을 미쳤으며, 체력과 신체적 자기가치가 높을수록 운동지속의도가 증가하였다. 이와 같이 지도자들의 가장 큰 관심인 운동참가자들에게 에어로빅에 대한 즐거움을 증진시키고, 운동참가를 지속시키기 위해 유용한 정보를 제공하여 바람직한 생활체육의 방향으로 나아갈 수 있도록 기초적인 자료로써 활용되기를 바란다. Women"s Aerobics Exercise self-esteem of the participants of this study aims to examine the relationship between physical self-perception and the degree of exercise lasting. Aerobics workout program and continue to participate in public and private sports centers in Seoul and Gyeong gi-do in order to clarify the purpose and selected a total of 500 patients with adult women call 400 was recovered, of which 366 additional analysis frequency analysis, reliability test, using the SPSS 12.0 for Windows program was used to conduct exploratory factor analysis (exploratory factor analysis) in order to verify the validity of the questionnaire, and t-verification, and stepwise multiple regression analysis (multiple regression analysis)the following conclusions were obtained. First, the higher the self-esteem of the Women"s Aerobics Exercise participants higher physical self-perception. Second, exercise lasting, higher positive self-esteem of women Aerobics Exercise participants also increased. Third, the stronger the movement of sustainable sports competence of the Women"s Aerobics Exercise participants self-perception of physical factors had a negative impact, increased stamina and physical self-worth, the higher the exercise of sustainable Aerobics on movement leaders" greatest concern to participants as to enhance the enjoyment of this, I hope to be utilized as basic data provide useful information in order to continue athletic participation desirable to move in the direction of the sport for so.
장상우(Jang Sang-Woo),이옥진(Lee Ok-Jin),김미예(Kim Mi-ye) 한국체육과학회 2009 한국체육과학회지 Vol.18 No.4
The purpose of this study was to analyze the perceived teaching behavior in physical education of weekend sport instructor in terms of learner and to offer a guideline for effective teaching behavior in physical education. The participants in this study were 205 elementary school students participating in physical activity program at weekend. They responded to The Perceived Physical Education Teaching Behavior Scale(Kim, Yoo, Huh, & Seo, 2005). Initial structure of the scale was produced from the method of principal axis factoring using SAS version 9.12, and squared multiple correlation(SMC) was selected for estimating prior communality. Scree test, cumulative proportion, and contexture interpreting were used to decide the number of factors. Then, oblique rotation was applied for extracting final factor structure. As the results, eight factors - explanation/direction, class participation, observation, negligence, free time, corporal punishment, positive feedback, negative feedback were extracted and interpreted. Collected data were computed mean and standard deviation and analyzed one-way ANOVA using SPSS version 12.0. The results were as follows. 1) The score of explanation/direction(M=4.03) had highest among all eight teaching behaviors. The scores of positive feedback(M=3.87), class participation(M=3.58), and observation(M=3.47) as effective teaching behaviors had high relatively. But the scores of negligence(M=1.99) and corporal punishment(M=2.02) as ineffective teaching behaviors had low relatively. 2) There were significant differences in the scores of seven teaching behaviors except negative feedback as a function of grade. 4-grade-students rated high score. 3) There were no significant differences in the scores of seven teaching behaviors except negligence as a function of participating duration of physical activity programs. 4) There were significant differences in the scores of explanation/direction and positive feedback as a function of physical activity's type. Fitness-oriented physical activity program had lower in the scores of explanation/direction and positive feedback than these of game-oriented and ball-sports programs.
초전도한류기가 적용된 배전계통에 분산전원 연계위치에 따른 고장전류 및 보호기기 동작분석
안성민(Sung-Min Ahn),김민수(Min-Soo Kim),장상우(Sang-Woo Jang),임성훈(Sung-Hun Lim) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.11
In this paper, the reduction of fault current and the operation of protection devices due to the application location of distributed generation in a power distribution system applied with a superconducting fault current limiter (SFCL) were studied. Through the short-circuit tests for the power distribution system with the different application locations of the distribution generations, the application effects of SFCL on the operations of the protective devices as well as the reduction of the fault current were analyzed.
24주간 야외 운동기구를 이용한 노인의 신체활동이 혈액변인, 건강 체력에 미치는 영향
장휘양(Jang, Hwi-yang),이예진(Lee, Yea-Jin),김은영(Kim, Eun-Young),장상우(Jang, Sang-Woo) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.4
The purpose of this study is to identify the effectiveness of outdoor exercise equipment which is the social welfare equipment by analyzing the changes in health related fitness and blood variables after the exercise program was carried out for 24 weeks by using outdoor exercise equipment with targets of the elderly. In order to achieve this goal, the elderly men and women living in K Gu at the age of 57-74 were selected as subjects and they were divided into an experimental group(EX-G, n=7; age, 66.6 ± 7.3 yrs; weight, 57.4 ± 6.1 kg; height, 166.3 ± 8.3 cm) and a control group(Con-G, n=7; age, 67.5 ± 4.5 yrs; weight, 61.8 ± 9.6 kg; height, 161.4 ± 8.9 cm). Outdoor exercise equipment program was carried out for 3 days/week and 60 min/day for 24 weeks. Changes in blood variables(glucose and total cholesterol in blood), health related fitness(muscular strength, muscular endurance, flexibility and cardiovascular endurance) were compared before and after experiment. Results of study showed that total cholesterol and blood glucose levels were decreased significantly in Ex-G after outdoor exercise equipment program was carried out(p<.05). It was shown that health related fitness factors were also significantly decreased in all items Ex-G(p<.05). In conclusion, outdoor exercise equipment program for 24 weeks could have a positive impact on health and physical strength of the elderly, and improvements on blood glucose and total cholesterol.
차량 간 통신을 위한 IEEE 802.11 라우팅 프로토콜 성능 분석
김상헌(Sang Heon Kim),정성대(Sung Dae Jung),장상우(Jang Sang Woo),이상선(Sang Sun Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this thesis, we analyze the performance of the IEEE 802.11 Ad-hoc network for v2v communication under a vehicular environment, focused on two main aspects. Those are the throughput and the fairness which related to QoS(Quality of Service). Through the results of the analysis, I figure out the fundamental problem of multihop network and the effect of mobility. Some suggestions for future researches are followed.
ITS 서비스 제공을 위한 VMC 응용 프로토콜 인터페이스 개발
정성대(SungDae Jung),장상우(Sang-Woo Jang),이상선(Sang-Sun Lee),한경수(kyeong-Soo Han) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Conversion technology between IT(Information Technology) and automotive technics creates the new industry of ITS (Intelligent Transport systems) and the new paradigm in electronics, communication and traffic fields. Specially, Vehicular communication in ITS field is one of the most important technologies necessary to connect among driver, vehicle and provider to provide quality services. Solutions for vehicular communication based on IEEE 802.11 are described in IEEE 802.11p. IEEE 802.11p WAVE (Wireless Access in the Vehicular Environment) defines amendments to IEEE 802.11 that are necessary to support ITS applications. In Korea, V2V (Vehicle-to-Vehicle) and V2I (Vehicle-to-Infrastructure) communication systems called VMC (Vehicle Multi-hop Communication) are being developed by the Electronics and Telecommunications Research Institute. In this paper, we define the API(Application Protocol Interface) and communication sequence to provide the quality services about the reliability data exchange based on VMC.