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이재윤,Lee, Jae-Yun 한국과학기술단체총연합회 1979 과학과 기술 Vol.12 No.1
목차 3. 산업기술 개발전략 (1) 공업화 핵심기술개발 (2) 미래지향적 특화산업기술개발 (3) 공업화 주변기술의 개발 (4) 국책적 종합기술의 개발 4. 맺는 말
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계량서지적 분석에서 지적구조 매핑을 위한 링크 삭감 알고리즘의 적합도 측정
이재윤,Lee, Jae Yun 한국정보관리학회 2022 정보관리학회지 Vol.39 No.2
Link reduction algorithms such as pathfinder network are the widely used methods to overcome problems with the visualization of weighted networks for knowledge domain analysis. This study proposed NetRSQ, an indicator to measure the goodness of fit of a link reduction algorithm for the network visualization. NetRSQ is developed to calculate the fitness of a network based on the rank correlation between the path length and the degree of association between entities. The validity of NetRSQ was investigated with data from previous research which qualitatively evaluated several network generation algorithms. As the primary test result, the higher degree of NetRSQ appeared in the network with better intellectual structures in the quality evaluation of networks built by various methods. The performance of 4 link reduction algorithms was tested in 40 datasets from various domains and compared with NetRSQ. The test shows that there is no specific link reduction algorithm that performs better over others in all cases. Therefore, the NetRSQ can be a useful tool as a basis of reliability to select the most fitting algorithm for the network visualization of intellectual structures.
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계량서지적 네트워크 분석을 위한 중심성 척도에 관한 연구
이재윤,Lee Jae-Yun 한국문헌정보학회 2006 한국문헌정보학회지 Vol.40 No.3
최근 일부 계량서지학 연구에서 사회 네트워크 분석 분야의 도구인 중심성 분석 기법을 도입하려는 시도가 나타나고 있다. 그런데 사회 네트워크를 대상으로 개발된 중심성 척도는 노드간 연결에 대한 가중치를 반영하지 않는 단점이 있다 이 연구에서는 가중 네트워크인 계량서지적 자료에 대해서 중심성을 분석할 수 있는 새로운 척도를 네 가지 제시하였다. 제안된 척도의 유용성을 검증하기 위해서 저자동시인용 네트워크. 용어 동시출현 네트워크, 웹사이트 동시링크 네트워크의 세 가지 실제 자료에 대해서 중심성 분석을 수행하였다. 분석 결과에서는 제안된 중심성 척도가 계량서지적 네트워크를 대상으로 개별 노드의 입지와 영향력을 파악하는데 있어서 매우 유용함이 확인되었다 Recently, some bibliometric researchers tried to use the centrality analysis methods and the centrality measures which are standard tools in social network analysis. However the traditional centrality measures originated from social network analysis could not deal with weighted networks such as co-citation networks. In this study. new centrality measures for analyzing bibliometric networks with link weights are suggested and applied to three real network data, including an author co-citation network, a co-word network, and a website co-link network. The results of centrality analyses in these three cases can be regarded as Promising the usefulness of suggested centrality measures, especially in analyzing the Position and influence of each node in a bibliometric network.
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이재윤,Lee, Jae-Yun 한국방위산업진흥회 1993 國防과 技術 Vol.- No.167
기술개발, 경제, 전력 융합재 생산구조로서 방위산업의 구조개선 및 위상재정립을 국민적 합의로 도출하기 위한 근본적 대책으로는, 세기적 변혁에 대응할수 있는 가치창출 비전과 정책수립을 대통령 주재하에 심의 할수 있는 범국가적 기구인 "기술.경제.안보위원회"의 창설, 운영방안을 모색하고자 합니다 동시에 현재 방위산업의 구조적 문제점인 경영상태 악화, 수출지원제도상의 문제, 정부조달제도의 문제, 전문계열화 문제, 기술개발부진 등을 해결해야 합니다
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타이타늄 합금에 다양한 두께로 코팅된 TiN 피막의 기계적 성질
이재윤,오동준,김희중,정재헌,Lee, Jae-Yun,Oh, Dong-Joon,Kim, Hee-Jung,Chung, Chae-Heon 대한치과보철학회 2007 대한치과보철학회지 Vol.45 No.5
Statement of problem: Titanium nitride(TiN) coatings are the most general and popular coating method and used to improve the properties of metallic surface for industrial purposes. When TiN coating applied to the abutment screw, frictional resistance would be reduced, as a results, the greater preload and prevention of the screw loosening could be expected. Purpose: The purpose of this study was to investigate mechanical properties of TiN coated film of various coating thickness on the titanium alloy surface and to evaluate proper coating thickness. Material and method: 95 Titanium alloy (Ti-6Al-4V) discs of 15 mm in diameter and 3 mm in thickness were prepared for TiN coating and divided into 7 groups in this study. Acceding to coating deposition time (CDT) with TiN by using Arc ion plating, were divided into 7 groups : Group A (CDT 30min), Group B (CDT 60min), Group C (CDT 90min), Group D (CDT 120min), Group E (CDT 150min), Group F(CDT 180min) and Group G (no CDT) as a control group. TiN coating surface was observed with Atomic Force Microscope(AFM), field emission scanning electron microscopy(FE-SEM) and examined with scratch tester, wear tester. Result: 1. Coating thickness fir each coated group was increased in proportion to coating deposition time. 2. Surface of all coated groups except Group A was homogeneous and smooth. However, surface of none coated Group G had scratch. 3. Adhesion strength for each coated group was increased in proportion to coating deposition time. 4. Wear resistance for each coated group was increased in proportion to coating deposition time. 5. Surface roughness in Group A, B, C was increased in proportion to coating deposition time. But, surface roughness in Group D, E, F was showed decreased tendency in proportion to coating deposition time. Conclusion: According to coating deposition time, mechanical properties of TiN coated film were changed. It was considered that 120 minutes coating deposition time ($1.32{\mu}m$ in coating thickness) is necessary.
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이재윤,Lee, Jae-Yun 한국데이터베이스진흥원 1998 디지털콘텐츠 Vol.12 No.-
한국데이터베이스진흥센터 산하의 한국정보검색위원회에서는 위원간의 연구의욕 고취와 새로운 검색 및 데이터베이스 관련기술 보급을 위해 매월 연구발표회를 개최하고 있다. 본 코너는 매월 발표된 주제논문을 게재함으로써 정보검색과 관련된 정보를 제공하기 위해 마련된 것이다.
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이재윤,유시홍,성민호,이성의,Lee, Jae-Yun,Ryu, Si-Hong,Sung, Min-Ho,Lee, Seong-Eui 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.8
A study on capacitive characteristics of stylus pen for touch panel are progressed in this paper. Also the main factors for capacitive sensitivity are studied. Namely, highly sensitive stylus pen which can be applied to capacitive touch panel are studied based on the analysis of materials and process conditions regardless of pattern shapes. Stylus pen was made of PDMS(Poly-Di-Methyl-Siloxane) and conductive metal powders which does not damage the touch panel surface. We tried to get the advantages of both the properties of soft PDMS and conductive metal powders. We found that potential difference of capacitance change with conductivity of the composite materials(PDMS + metal powders) it implies that during touch process, large voltage difference can be caused by the high conductive materials of stylus pen. Stylus pen made by PDMS with mixed with Ag powders which has large conductivity shows more capacitance change of 1 pF than PDMS with other materials of Ni or C powders.
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