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이수경,문준희,황숙현,김금채,이동윤,김도현,전민현,Lee, S.K.,Moon, J.H.,Hwang, S.H.,Kim, G.C.,Lee, D.Y.,Kim, D.H.,Jeon, M.H. 한국진공학회 2008 Applied Science and Convergence Technology Vol.17 No.1
본 연구에서는 염료감응 태양전지의 상대전극으로써 다중벽 탄소나노튜브를 사용하여 전기화학적 특성에 미치는 열처리 효과에 대해 연구하였다. 다중벽 탄소나노튜브는 실리콘 기판위에 철 촉매를 사용하여 열화학 기상증착법으로 합성하였다. 직경이 다른 다중벽 탄소나노튜브를 각각 성장하여 두 개의 샘플을 준비하였고 질소 분위기의 RTA(rapid thermal annealing) system에서 $900^{\circ}C$ 온도로 1분간 열처리 하였다. 다중벽 탄소나노튜브의 구조적, 전기적, 전기화학적 특성은 FE-SEM, Raman spectroscopy, 2-point probe station, electrochemical impedance spectroscopy (EIS)을 이용하여 측정하였다. 라만 스펙트럼 분석에서 열처리 한 다중벽 탄소나노튜브의 I(D)/I(G) ratio는 상당히 감소한 것을 확인하였으며, 다중벽 탄소나 노튜브 표면과 전해질과의 산화 환원 반응 특성에서는 열처리 전보다 열처리 후의 전해질과의 산화 환원 반응 특성이 향상된 것을 알 수 있었다. 표면에서의 반응 저항 또한 열처리 후의 다중벽 탄소나노튜브가 더 낮은 값을 나타내었다. 그 결과, 열처리 후의 다중벽 탄소나노튜브를 상대전극으로 사용하였을 때의 전기화학적 특성이 더 좋은 것을 확인하였다. We have studied the effect of heat treatment of multi-walled carbon nanotubes (MWNTs) as a counter electrode on the electro-chemical properties of dye-snsitized solar cells. MWNTs on the p-type Si substrate were synthesized by thermal chemical vapor deposition (CVD) using Fe catalysts. We prepared the two types of MWNTs samples with the different diameters. The rapid thermal annealing (RTA) treatment for the MWNTs was carried out at the growth temperature ($900^{\circ}C$) for 1 minute with $N_2$ gas atmosphere. The structural, electrical and electrochemical properties of MWNTs were investigated by field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy, 2-point probe station and electrochemical impedance spectroscopy (EIS). The I(D)/I(G) ratio of heat-treated MWNTs in Raman spectra was considerably decreased. It was also found that the heat-treated MWNTs showed better redox reaction of iodide at the interface between MWNTs surface and electrolyte than that of as-grown MWNTs. The redox resistance value of heat-treated electrodes was measured to be much lower than that of as-grown electrode at the interface. As a result, the counter electrode using the heat-treated MWNTs showed better electrochemical properties.
비구면 유리 렌즈 성형용 초경합금(WC) 표면에 이온 빔 보조 마그네트론 스퍼터가 적용된 이리듐-레늄 코팅 박막 특성에 관한 연구
정경서(K. S. Jung),김미선(M. S. Kim),이상원(S. W. Lee),최상경(S. K. Choi),이수경(S. K. Lee) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.10
Iridium-Rhenium(Ir-Re) thin films were deposited onto the tungsten carbide(WC) molding core by ion beam assist sputtering system. The Ir-Re films were prepared by compound-target sputtering with iridium, rhenium and chromium as the sources. Argon were inlet into the chamber to be the plasma and reactive gases. The Ir-Re thin films were prepared with targets having atomic percent of 7:3 and the Ir-Re thin films were formed with about 200 ㎚ thickness. The Ir-Re thin films on tungsten carbide molding core were analyzed by scanning electron microscope(SEM) and surface roughness. Also, adhesion strength and coefficient friction of Ir-Re thin film were examined. The Ir-Re coating technique has been intensive efforts in the field of coating process because the coating technique and process have been their feature, like hardness, high elasticity, abrasion resistance and mechanical stability and also have been applied widely the industrial and biomedical areas. In this report, tungsten carbide(WC) molding core was manufactures using high performance precision machining and the efforts of Ir-Re coating on the surface roughness.
정명수,김성천,이은경,천은주,한종민,이수경,강성호,유택수,정재열,송용선,이기남,Chong M.S.,Kim S.C.,Lee E.K.,Chun E.J.,Han J.M.,Lee S.K.,Kang S.H.,Yu T.S.,Jeung J.Y.,Song Y.S.,Lee K.N. 대한예방한의학회 2000 대한예방한의학회지 Vol.4 No.1
On the process of research in the plan on oriental medical participation in the industrial health sponsored by BK21 project, we carried out the oriental medical health examination program for workers during former half-year We reached the conclusion as follows, 1. The oriental medical health examination program is contents and formalities that should be determined by present industrial health system, based on the oriental medical system and scholastic character, and included probability of the western and oriental medical cooperation. 2. The oriental medical health examination program can promote capability of individual health management and productive power of workers, and it is capable to manage on the self-conscious symptoms and macroschophically approach to their environment 3. The oriental medical health examination program that we have developed, is flow as questionare, understanding of working environment, information of result and later management. It is composed of three fields as follow , first, use of pulse diagnostic apparatus, understanding of the health promotion life style, and diagnosis of the oriental medical doctor, second, analysis of constitution, third, photographing for understanding of the musculoskeletal disorders, questionare for musculoskeletal self-conscious symptoms, and diagnosis of oriental medical doctor. 4. The oriental medical health examination program that we have developed, progressive from the view point of health, makes the oriental medical doctor's roll more important. It is the first trial at the western and oriental medical cooperation and characterized by excellence about musouloskeletal disorders. But it need to be improved in aspects of time and specialist on the health examination, diagnostic apparatus, control of examinant and later management. So we think that it needs research on the employment of health examination specialist, establishment of later management system, development of significantly diagnosable standard and assessable form on the health examination, and contents of health examination on the western and oriental medical cooperation.
이은경,정명수,천은주,김삼태,강성호,이수경,한종민,김성천,유택수,정재열,송용선,이기남,Lee E.K.,Chong M.S.,Chun E.J.,Kim S.T.,Kang S.H.,Lee S.K.,Han J.M.,Kim S.C.,Yu T.S.,Jeung J.Y.,Song Y.S.,Lee K.N. 대한예방한의학회 1999 대한예방한의학회지 Vol.3 No.2
Oriental Medical Service established foundation that Oriental medical clinic can take part in industrial health service by being specified industrial calamity medical treatment organ, but research which develope program that Oriental Medical Service approach on the occupational disease and industrial health only dealt in the Western Medical System was insufficient. So we studied on theoretical foundation and basic bearing about .program of oriental medical health examination in the workplace, it is based on explanation and assessment reformed by western medicine. We reached the conclusion as follows, 1. We must reconsider the concept that mind of Oriental medicine is preventive medicine, and assess positively result of social medicine. 2. Importance of industrial health is being enlarged in the category of health care. 3. Western medical health in including industrial health have faced much problems at this time, we can search by alternative proposal grafting on Oriental Medicine. 4. Oriental medical participation in the industrial health have various benefits at side satisfaction of workers, effect of prevention, efficiency of cost, and increasing rate of medical treatment and return to workplace of workers with industrial calamity. 5. We must consider Oriental Medical Health Examination as one way of health management program of workers, not as formality. 6. The advantage of Oriental Medical Health Examination can increase ability of individual health management in preventive medicine and the production in workers' health management.
E-marketplace에서의 공급자 선정을 위한 의사 결정 지원 시스템
이동주(DongJoo Lee),이상희(SangHee Lee),이수경(S.K. Lee),이태희(T.H. Lee),김미숙(M.S Kim),송미화(M.H. Song),이상구(S.G. Lee) 한국정보과학회 2004 한국정보과학회 학술발표논문집 Vol.31 No.2Ⅱ
의사 결정 지원 시스템에 대한 연구는 오래 전부터 진행되어 왔다. 의사 결정 지원 시스템은 많은 분야에 적용될 수 있고, 적용되는 환경에 따라서 다양한 특정을 가진다. 본 논문에서는 e-marketplace에서 공급지 선정을 위한 의사 결정 지원 시스템 구현을 위한 환경 및 시스템의 특정에 대해서 알아보고, e-marketplace에서의 공급지 선정을 위한 정책 기반 모델을 제시하고, 이를 구현함으로써 의사 결정 지원 시스템이 e-marketplace에서 어떻게 구현될 수 있는지를 보인다.