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요오드화 알킬 존재하의 비닐아세테이트의 조절된 라디칼중합
마석일,남혜인,한규찬,권순홍,Mah, Souk-Il,Nam, Hye-In,Han, Kyu-Chan,Kwon, Soon-hong 한국섬유공학회 2002 한국섬유공학회지 Vol.39 No.5
Radical polymerization behaviors of vinyl acetate (VAc), initiated by N, N-azobisisobuty-ronitrile(AIBN) in the presence of several alkyl iodides(RI) such as chloroiodomethane(CIM), iodoform, and tridecafluorohexyliodide(TDFHI) have been investigated. Living natu.e, i.e., a fairly good agreement between the number average degree of polymerization of the resulting polymer (DP$_{n}$) and the theoretical value, determined by the molar ratio of VAc and RI, which is based on the assumption that one polymer molecule is formed by one molecule of RI. A linear relationship is observed between % conversion and DP$_{n}$ is observed when the molar ratio of AIBN/RI is kept at 2. The MWD of the resulting polymer decreases as % conversion increases. Polymers having narrow molecular weight distrbution (DP$_{n}$DP$_{n}$ <1.5) are obtained in the late. stage of polymerization. However, experimental DP$_{n}$ values show deviation from the theoretical values in the early stage of polymerization. This leads us to the conclusion that the living nature of the system is ascribable to the stabilization of the active propagating radical species by rapid iodine exchange with RI followed by the establishment of equilibrium between the active propagating radical species and polymer having a dormant carbon-iodine terminal group. The factors resulting in the loss of the living nature have also been discussed in conjunction with the results obtained from photo-induced polymerization.erization.
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나연경 ( Yeon Kyung Na ),남혜인 ( Hye In Nam ),박경원 ( Kyung Won Park ),우남현 ( Nam Hyun Woo ),윤유라 ( Yu Ra Yoon ),장미경 ( Mi Kyung Jang ),전민아 ( Min A Jeon ),조현경 ( Hyun Kyung Cho ) 한국보건정보통계학회 (구 한국보건통계학회) 2011 보건정보통계학회지 Vol.36 No.2
Objectives: The purpose of this study was to investigate how the smart phones influence on well-being behavior of university students. Methods: The data were collected from 204 university students, those answered questionnaires from August 20, 2011 to September 3, 2011. The collected data were analyzed by using SPSS 19.0 program with t-test and ANOVA. Results: The well-being behavior was classified into dependence, obsession, disorder, compulsion. The mean value of all the questions was 2.1 9(sd=l.23), compulsion (mean=2.46) was the highest among the elements, Gender significantly affected the dependence (p=0.00l) and compulsion (p0=0.0l2), Major field of study affected the dependence (p=0.004) and disorder (p=0.003), Using time showed the significant difference in dependence (p=0.006) and compulsion (p=0.005). There was not significant between major usage and well-being behavior, Conclusions: The result suggest that smart phone affects on well-being behavior in university students and it is related to gender, major field of study and using time.
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데이터 기반 경영을 위한 국가R&D API관리시스템의 운영 데이터 활용 가능성 탐색
나혜인(Hye-In Na),이준영(Jun-Young Lee),이병희(Byeong-Hee Lee),최광남(Kwang-Nam Choi) 한국콘텐츠학회 2020 한국콘텐츠학회논문지 Vol.20 No.4
본 논문은 최근 세계적인 데이터 개방 · 공유 정책에 따라 국가R&D 데이터 기반 경영을 위한 효율적인 국가 R&D API(Application Programming Interface) 관리시스템 구축과 운영 데이터 활용 가능성 탐색을 목적으로 한다. 국가R&D 데이터 개방·공유 추세에 따라 국가R&D API 서비스의 운영 데이터 분석을 통해 경영효율화 방안을 마련한다. 이를 위해 기존에 개별적으로 배포하던 국가R&D API에 대해 파라미터를 표준화하고 개별 API들을 통합하여 국가R&통합API 관리시스템을 구축한다. 국가R&D API의 서비스 호출 트래픽을 보면 측정을 시작한 2015년 대비 2019년까지 554.5%의 큰 성장세를 이루고 있다. 이에 따라 본 논문은 국가 R&D통합API 관리시스템의 실제 운영에 있어서 서비스 운영관리 데이터 기반의 데이터 준비, 분석, 예측을 통해 운영 데이터 활용 가능성을 탐색한다. This paper aims to establish an efficient national R&D Application Programming Interface (API) management system for national R&D data-driven management and explore the possibility of using operational data according to the recent global data openness and sharing policy. In accordance with the trend of opening and sharing of national R&D data, we plan to improve management efficiency by analyzing operational data of the national R&D API service. For this purpose, we standardized the parameters for the national R&D APIs that were distributed separately by integrating the individual APIs to build a national R&D API management system. The results of this study revealed that the service call traffic of the national R&D API has shown 554.5% growth in the year as compared to the year 2015 when the measurement started. In addition, this paper also evaluations the possibility of using operational data through data preparation, analysis, and prediction based on service operations management data in the actual operation of national R&D integrated API management system.
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