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유헬스에서의 확장된 기술수용모형 적용 - 자기효능의 영향 중심
김민철,Kim, Mincheol 한국정보통신학회 2014 한국정보통신학회논문지 Vol.18 No.12
본 논문은 스마트 폰 기반의 유비쿼터스 헬스 시스템의 수용 여부에 영향을 미치는 건강 자기효능감 (health self-efficacy) 및 기술 자기효능감 (technology self-efficacy) 요인들의 영향 정도를 확장된 기술수용모형(TAM)을 통하여 분석하는데 목표를 두고 있다. 본 논문에서는 표본의 크기를 고려하여 제시된 연구 모형을 검증하기 위하여 PLS-SEM 방법론을 적용하였다. 분석 결과, 제시된 연구모형의 적합성을 확인하였고, 각 경로 계수의 통계적 유의성 또한 분석이 되었다. 결국, 기술 자기효능감인 스마트 폰 기기의 사용에 대한 쉬운 접근성만 높일 수만 있다면, 사용 의도의 가능성이 높아짐을 확인할 수 있었다. The aim of this study was to search for the effects of health self-efficacy and technology self-efficacy on user's behavioural intention by the extended TAM focused on smartphone base ubiquitous health system. In this research, in view of small sample size, PLS - SEM methodology was applied to this study in order to the proposed research model. As a result of analysis, the statistical fitness of proposed research model was confirmed through GoF value and the path coefficient was calculated for the hypotheses test. Finally, the implications of analysis result showed that when the use of smartphone device could be easily accessed in the side of technology self-efficacy, the possibility of user's behavioural intention also might be higher.
Mincheol Kim(김민철),Hae-Jin Kim(김해진),Keun-Hyung Kim(김근형),Dong-Cheol Lee(이동철) 제주대학교 관광과경영경제연구소 2019 産經論集 Vol.39 No.3
Purpose - In this paper, we investigated and analyzed current operations of the entry-level companies that belong to the local Open market so that we drew management strategies of the local Open Market. As a result, the number of entrants will increase when management improves, such as improving the competitiveness of local open markets, and a diverse range of products will be created, which will lead to diverse customer experiences, creating a virtuous circle of ecosystems that will lead to an increase in visitors. Research, design, data, and methodology - The survey was conducted on 739 entry-level companies to analyze the operational status of businesses located in the local open market. We collected data from the entry-level companies by questionnaire, which would be divided into quantitative and qualitative parts. The quantitative part of the questionnaire includes satisfaction, improvement, promotion cost, sales commission, the use for the other Open Market platform and so on. The qualitative part of the questionnaire includes satisfactions, difficulties and improvements. The quantitative data was analyzed by frequency analysis, t-test and ANOVA. The qualitative data was analyzed by Text mining techniques. Results - We derived results as followings. First, we recognized that the entry-level companies would be satisfied wit sales commission. Second, we recognized that the entry-level companies had spent individually the cost for promotion. Third, we confirmed that the entry-level companies had utilized the other Open Market platform. Conclusions - Through the analysis results, we could derive four viewpoints as followings. First, the local Open Market should be managed in being integrated into representative Open Market in order to derive promotion effectiveness, operation efficiency and improvement of brand value. Second, it should be necessary for the integrated promotion strategy of the entry-companies to be established in order to derive efficient and effective promotion. Third, it should be necessary to improve the functions of the Online Open Market platform System to simply the function complexity and support real-time processing. Fourth, it might be possible to raise the sales commission to improve the service functions of the local Open Market. The limitations of this study are as follows. First, the broader usability question did apply only to the public relations, satisfaction, and improvement opinions, which are the priorities of using the platform. Second, surveys of samples biased in some areas indicate that there is a limit to the generalisation of the results.
BIM기반 실내공간정보구축 및 위치정보 활용 서비스 동향 고찰
김민철(Kim MinCheol),장미경(Jang MiKyoung),홍성문(Hong SungMoon),김주형(Kim JuHyung) 한국BIM학회 2015 KIBIM Magazine Vol.5 No.3
Increasing size and complexity of indoor structures have led to much more complication in the spatial cognition and situational awareness. Contrary to outdoor environments, occupants have limited information regarding the indoor space syntax in terms of architectural and semantic information as well as how they interact with their surroundings. The availability of such information could give conveniences to both users and managers in various aspects. In order to visualize the exact location of rooms and utilities in 3D, many studies and projects have utilized BIM models because of its promising value of representing building components. In fact, the application of BIM provides definitive spatial indoor data and creates services for indoor space management and navigation. Therefore, this paper aims to provide an overview of practices on BIM-based indoor spatial information implementation and location-based services. It is expected that enabling of technologies, data-rich content and accessibility of information products will accelerate the growth of the spatially-related markets in various fields.
GPU에서 Contain-Link를 이용한 R-tree 구현
김민철(Mincheol Kim),유승범(Seungbum Yoo),최원익(Wonik Choi) 한국정보과학회 2014 정보과학회논문지 : 데이타베이스 Vol.41 No.2
1984년 R-tree가 제안된 이후 R-tree의 질의처리 성능을 높이고자 많은 노력들이 있었다. 하지만, 이러한 노력에도 불구하고 점점 빠르게 커져가는 빅데이타를 처리하기 위한 추가적인 질의처리 성능개선에 여전히 많은 관심이 집중되고 있다. 본 논문에서는 이러한 문제를 다루고자 CL-tree를 제안한다. 제안 기법은 범위질의 시에 질의영역과 노드의 엔트리들의 포함관계를 고려한다. CL-tree는 범위 질의 시엔트리들이 질의영역에 포함(contained)되어있다면 중간노드를 방문하지 않고 직접 단말레벨에 접근하기위해 contain-link라는 포인터를 이용한다. CL-tree의 설계 목표는 트리를 순회할 때 contain-link를 사용하여 불필요한 노드의 방문을 제거함으로써 오는 장점과 GPU의 병렬처리에서 오는 장점을 결합하는 것이다. 다양한 조건에서의 실험을 통해 CL-tree는 GPU에서의 선형검색에 비해 최대 3배, G-tree에 비해 1.3배 가량의 성능이 향상됨을 보인다. Since the R-tree was proposed in 1984, there have been numerous research efforts on R-tree variants for improving its query performance. Despite all of these efforts, there are still growing interests in further accelerating query performances with the big data that grows faster and bigger in size. To cope with this problem, we propose CL-tree(Contain-Link tree), a novel indexing method that takes into account the relationships between a query range and entries in a node during query processing. Specifically, CL-tree employs a special pointer called contain-link to directly access the leaf level without visiting intermediate nodes when nodes are contained within a given query. The rationale of CL-tree is to combine the benefits from avoiding unnecessary visits during tree traversal using the contain-links and the parallel processing power of GPU. Our extensive experiments show that CL-tree achieves query performance up to 3 times higher than that of a sequential scan in GPU and up to 1.3 times higher than that of a G-tree, respectively.