프로야구 구단SNS(Social Network Service) 이용자의 지식공유의도와 만족, 지속사용의도 및 관람의도와의 관계

이제욱(Je Uk Lee),박성제(Sung Je Park) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.47

The purpose of this study is to examine relationship of the knowledge sharing intent & satisfaction, continuous usage intention, and watching intention on users of twitter(twitter.com), which is SNS(Social Network Service) of Korean Professional Baseball Club. For data survey, the followers of official twitter for Korean Professional Baseball Club were selected as research subjects. Also, Internet Survey was carried out by using questionnaire, which was composed of constitutional factors(knowledge sharing intent, satisfaction with using SNS, continuous usage intention, and watching intention) in a model, which was established on the basis of the objective of research, Totally 502 copies of questionnaire were collected. Except 4 copies with insincere response, 498 copies of questionnaire were used in the statistical test. To verify reliability and validity on a concept of forming the collected questionnaires, the internal consistency and exploratory factor analysis were carried out by using SPSS18.0. Through confirmatory factor analysis of AMOS18.0, the convergence validity and discriminant validity were confirmed. To verify structural equation model that was established for the objective of research, the path analysis was carried out. As a result of analysis, twitter users` knowledge sharing intent was indicated to have partial influence upon Usability and Communication, which are sub-factors of SNS users` satisfaction. Even the factors of having positive effect on continuous usage intention were indicated to be Usability and Communication. Also, the continuous usage intention showed the positive influence upon the watching intention. SNS(Social Network Service) of Korean Professional Baseball Club can be known to be a factor of having positive influence upon continuous visit and watching on web site through forming relations and sharing knowledge and information in users.

하브루타 학습법이 PIRSO 요소 변화에 미치는 영향

이제욱(LEE, Je–,Uk),류희수(Ryu, Heuisu) 학습자중심교과교육학회 2017 학습자중심교과교육연구 Vol.17 No.24

본 연구는 하브루타 학습법이 수와 연산과 측정 영역의 수학적 정당화 분석틀(PIRSO) 요소 변화에 미치는 영향을 탐색하기 위하여 시행되었다. 연구대상자는 인천 G초등학교 3학년 학생 24명이었으며, 하브루타 학습의 효과를 확인하기 위해 양적자료를 이용한 연구를 설계하였다. 2016년 7월 사전검사를 실시하였고, 2016년 9월∼12월 하브루타 학습을 적용하여 수업을 실시한 뒤 사후검사를 실시하였다. 양적자료 분석은 준실험설계의 단일집단 사전-사후검사 설계를 적용하여 분석하였다. 그 결과 본 연구에 참여한 3학년 학생들의 경우 PIRSO 요소의 수준은 학생별로, 과제별로 차이가 있었으나 전반적으로 모든 영역의 요소 수준이 상승하였으며, 그중에서도 특히 측정 영역의 조작적 불변자(I) 평균 0.88단계, 수학적 정당화 단계(S) 평균 0.54단계, 논리의 구성(O) 평균 0.5단계가 다른 요소들보다 높은 단계 상승이 있었다. 또한 수와 연산 영역의 조작적 불변자와 수학적 정당화 단계와 측정 영역의 조작적 불변자, 논리의 구성이 대응표본 t검정에서 유의미한 차를 나타내었다. 위와 같은 결과를 통해 본 학습의 적용은 학습자에게 유용한 학습법이라 보여진다. This study purposes to provide implications of the PIRSO factor level improvement in the math classes of elementary school by verifying the PIRSO factor level in number, operation and measurement of students in the 3rd grade of elementary school, and analyzing effect of Havruta learning method on change of PIRSO factors by measuring the PIRSO factor level after conducting classes applying Havruta. Through this study, the following conclusions have been identified: in the case of the 3rd grader students participating in this study, the PIRSO factor level differed by students and tasks, but overall, the factor levels in all areas were increased, in particular, operant invariant(I), mathematical justification(S), and composition of logic(C) in measurement increased higher than other factors.

스포츠 공공 빅데이터(Big Data)의 미래 활용가치를 위한 발전방안

박성제(Sung Je Park),이제욱(Je Uk Lee) 한국사회체육학회 2013 한국사회체육학회지 Vol.0 No.54

From 1990s onward, the level of Korea`s informatization has grown at a remarkable speed to a global level, ranking high in various reports by information agencies assessing the e-government and informatization index. Especially, Seoul Metropolitan Government provides public data of all sectors by launching the “Open Data Plaza(data.seoul.go.kr)” where anyone can download data and use it to create various contents(Kim Soodong, 2009). In the area of sports, there have been many efforts to implement new policies and research projects for practical use of informatization. For example, through the promotion of “cultural informatization” by the Ministry of Culture and Tourism, three-stage establishment of comprehensive cultural information system(2001-2010) was carried out. Also, Korea Sport Science Institute is leading the development of contents for informatization of sports, DB search and cyber fitness management system. However, it has been pointed out that these projects have the limit of producing only short-term results due to its near-sighted focus. This is surfaced in the public data in the fields of sports presented by the aforementioned “Seoul Open Data Plaza” which exhibit several problems. Firstly, the lack of identity in the categorization of data is noticeable. Sports public data is categorized not as a stand-alone category but under the “culture and tourism” group. Searching “sport” at the British public data portal “data.gov.uk” yields about 120 results. Not only are there many results available, but they are also wide-ranged and interesting. Furthermore, at the initial stage of building the DB for the “Seoul Open Data Plaza,” the research of “social big data” was performed using Twitter(www.twitter). The thousands and millions of personal opinions flowing in the social network naturally expose social big data that presents a demand forecast with more perceptive insights than traditional means of surveys. Demand for sports public data could be surveyed again from a point of view strictly concerning sports which has been relatively neglected so far during the existing processes. The web paradigm of the current information society is to create new values through new services for the gen - eral public and business models using public data, and sports public data should also strengthen its role in fulfilling the right of the public to know and in offering a chance to accumulate new intellectual property.

영상분석 활용효과 탐색을 위한 심층면담 사례연구

박성제(Park, Sung-Je),박광문(Park, Kwang-Mun),이제욱(Lee, Je-Uk) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.6

The purpose of this study is to explore the training outcome of IAAF World Championship Daegu 2011 relay team in Male Athletics with application of video analysis. A shooting method was made the leading runner’s position in the baton-touch section, the later runner’s start timing, and the arm position & the hand movement given touching, respectively, with the major focus by using 2cameras. The shot image after performing was immediately shown on the training field. Director and coach’ verbal description and visual feedback were mixed. Also, at a squad meeting after being finished training, all of team members gathered and discussed with watching after editing the training image. Materials were collected through the participatory observation and the in-depth interview in order to examine its effect of the training period by adopting Video analysis. First, a change in communication. What monitors the image right away after performing could be confirmed the effects on removing the conflict elements, which may occur in feedback, opinion reconciliation, and reliable relationship between athletes and between athlete and coach and on improving teamwork and atmosphere, and further athletic performance. Second, the limitation of squad meeting, which is progressed only with memory of athletes and coach without image was overcome through analyzing image. The positive effect on athletes’ participation level, atmosphere and immersion could be confirmed. Third, there was a little difference by individual in camera angle of being desired by athletes. However, to see armㆍknee movement and angle, baton touch, and start point, the lateral angle was mostly preferred. To confirm own speed and balance in the upperㆍlower body, the front angle was preferred.

특집: 유기광.전자 소재 및 소자 기술 - 전기 활성 고분자 복합재 기술 및 응용

이상복,이진우,이원오,이제욱,엄문광,Lee, Sang-Bok,Lee, Jin-U,Lee, Won-O,Lee, Je-Uk,Eom, Mun-Gwang 재료연구소 2011 機械와 材料 Vol.23 No.2

전기 활성 고분자 복합재는 전기적 자극을 가하여 기계적 움직임을 얻을 수 있고, 기계적 자극을 통해 전기적 신호를 얻을 수 있어 차세대 액추에이터 및 센서와 생물학적 조직과의 유사성으로 인공 근육 및 로봇분야의 응용소재로 최근 주목받고 있다. 본고에서는 전기 활성 고분자 복합재의 기본적이 개념과 함께 국내외 기술 동향을 살펴보았다. 또한 전기 활성 고분자 복합재에 있어 핵심내용인 전기활성 소재의 종류 및 작동원리, 전극소재, 이를 이용한 센싱 및 액추에이팅 구동특성과 응용에 대해 소개하고 마지막으로 현 시점에서의 전기 활성 고분자 복합재 응용에 있어 문제점과 이를 해결하기 위한 연구방안에 대해 언급한다.

빅데이터(Big Data) 시대의 소셜 네트워크 분석 (Social Network Analysis) 기법과 스포츠 분야의 활용전략

박성제(Park, Sung-Je),이제욱(Lee, Je-Uk) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.5

Social Network Analysis was first introduced in Korea during 1980’s and has been used in many studies as the tool to identify the properties of the human networks. Since then, many researchers in Korea and other countries adjusted and upgraded the social network analysis method, which is gaining more and more attention as the advance of Bid Data concept and the need for an advanced technology to analyze the characteristics of data of large volume and high variety. As such, the ever-evolving social network analysis technology has been adopted by the academic field and utilized in a variety of applications, while the discipline of sports still repeats the previous methodology. There have been several study attempts, where knowledge maps are established and the game analysis, such as the path connection networks, was used. However, it is still necessary to improve the qualitative level of the sports researchers by more widely introducing such analytical methods and apply/develop analytical techniques that reflect the characteristics of the sports science.

프로야구 구단SNS(Social Network Service) 이용자의 SNS만족, 커뮤니티 동일시, 지속사용의도 및 관람의도와의 관계

박성제(Park, Sung-Je),이제욱(Lee, Je-Uk) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.3

The purpose of this study is to find the relationships between Usage Intention and spectatorship, and community identification of Korean professional-baseball teams SNS with the SNS use satisfaction scale. Data was collected through internet-survey, targeting SNS users of the teams, and relationship between each variable was investigated using AMOS18.0. As a result, among the subordinate factors of SNS use satisfaction, the usability and communication which are focused on social relationship had a positive effect on spectatorship, knowledge sharing and community identification, but openness and timeliness, which are functional satisfaction scale of cellphones that use SNS, did not affect each of the factors.

저가형 Camera sensor를 이용한 자율주행 Trailer hitch angle 검출

장성빈(Sung Been Jang),신희석(Heeseok Shin),이제욱(Je Uk Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11

With the recent increase in the autonomous vehicle industry, research on self-driving technology has been actively conducted on specially equipped vehicles such as buses and trailers or commercial vehicles, beyond research on autonomous driving based on general passenger vehicles. In particular, the trailer has a tracker part that a person drives and a trailer part that carries luggage. In general, in forward driving, only the length of the vehicle is a little longer, and there is no difficulty in driving. However, when driving in reverse, steering is difficult because the steering angle is opposite to that of a general vehicle. The most important part in reverse driving is the detection of the hitch angle, which is the connection part between the tracker and the trailer. Therefore, this paper aims to detect the trailer hitch angle using the rear camera, which is a low-cost sensor attached to a tracker vehicle, not an encoder or expensive sensor.

자율주행 차량의 시스템 우선모드에서 경고 상황 발생 시 빠른 운전권 전환 방법에 관한 연구

김정현(Jung-Hyun Kim),이동훈(Donghun Lee),이제욱(Je Uk Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

This research measured and proved, by actual vehicle experiments, what the fastest device for driver’s intervention in system priority(Autonomous drive) mode of the autonomous vehicle. In order to support actual experiments, this research suggest categories of possible Fail-Safe cases for the vehicle and two hypotheses related to driver’s intervention time. The 1st hypothesis is that the driver who has more driving and control experience ADAS(Advanced Driver Assistant System) or the autonomous vehicle would be faster to react than the others. The 2nd hypothesis is that the Driver’s intervention time would be shorter when using the vehicle’s device(Brake pedal) rather than the autonomous mode control device. For experiments, the criteria of driver’s intervention time is based on driver’s recognition time for surrounding environment while driving of the Korean Road Design Standards.

Leader-Follower 농업용 궤도차량의 β 계수를 이용한 Skid Steering과 Pure Pursuit의 융합 및 선회력 보정 알고리즘 개발

김정현(Jung-Hyun Kim),김현우(Hyun Woo Kim),이제욱(Je Uk Lee) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11

In this research, Studied the method of geometric path tracking of the Leader-Follower agricultural tracked vehicle that can recognize the leader and followed by autonomy in various atypical agricultural environments. The navigation system of the vehicle was based on the convergence between Skid Steering and Pure Pursuit that studied in the field of robotics. This facilitates the vehicle can easily follow the leader through distance and angle information of the leader that is made by perception system of the vehicle. This method is more simple and easy to control the vehicle than using complex vehicle and ground modeling process. The ultimate goal of this research is to explain how the vehicle can calculate and map the β coefficient by setting the perception area of the vehicle. And suggest simply adaptive β coefficient for control system of the vehicle. Actual vehicle experiment is proved that the vehicle’s rotation ability would be compensated by β coefficient.