박물관자료의 보존조건

최광남,Choi Kwang-Nam 한국대학박물관협회 1986 고문화 Vol.28·29 No.-

DC magnetron 방법과 RF 스퍼터링 방법으로 제작된 Nickel Oxide 박막의 특성 연구

최광남(Kwang Nam Choi),박준우(Jun Woo Park),백승호(Seoung Ho Baek),이호선(Ho Sun Lee),곽성관(Sung Kwan Kwak),정관수(Kwan Soo Chung) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7

We deposited nickel oxide(NiO) thin films on silicont'Si) substrates at Room temperature and 500℃ using a nickel target by reactive DC and RF sputtering. In addition, we anneal to NiO thin films deposited at room temperature. Using spectroscopic eillipsometry, we obtained optical characteristics of every films. We discussed relations of the optical and structural properties of NiO thin films with the oxygen flow rate, substrate temperature and annealing temperatures. Refraction was decreased and defect was increased when NiO thin films was annealed. We also analyzed the electrical characteristics of NiO films which deposited DC and RF sputtering method.

비정질 실리콘의 자기정렬콘텍 (Self Aligned contact)에서 LPCVD 공정시간에 따른 특성 변화 연구

최광남(Kwang Nam Choi),곽성관(Sung Kwan Kwak),김동식(Dong Sik Kim),정관수(Kwan Soo Chung) 대한전자공학회 2006 대한전자공학회 학술대회 Vol.2006 No.11

The effects of processing time on the crystallization of the amorphous silicon for self aligned contact (SAC) pad deposited on the silicon substrate using low-pressure chemical vapor deposition (LPCVD) are presented in this paper. The amorphous silicon film is being subjected to processing time from 60 to 100 min for usual amorphous silicon growth. Usual processing lime of the amorphous silicon is 100 minutes, but we tried 60 minutes processing time to study the effect on the property of silicon. Transmission electron microscopy (TEM) shows that the crystallization of the amorphous silicon to poly silicon begins to occur for 60 min of LPCVD. The tendency to grow ploy crystalline silicon is likely due to the reduced surface oxidation during grain growth and crystallization at shorter processing time. Reduced contact resistance of the poly silicon contact pad was also measured for 60 min processing time. Our result will be beneficial to mass production companies. The detailed study of the structural, morphological and property changes of the amorphous silicon layer upon different processing time will be presented.

시판 한식 반찬류의 미생물학적 품질 평가

최광남(Kwang-Nam Choi),김태형(Tae-Hyeong Kim),배현주(Hyun-Joo Bae) 한국식품영양과학회 2019 한국식품영양과학회지 Vol.48 No.3

시판 한식 반찬류의 품질 개선 방안을 마련하고자 3개 도시의 반찬가게 29곳에서 구입한 총 126개의 반찬류의 미생물학적 품질을 평가한 결과는 다음과 같다. 시료 반찬류 중 가열조리공정 메뉴가 58.8%, 복합조리공정 메뉴가 32.8%, 비가열조리공정 메뉴가 8.4%였다. 조리공정에 따른 일반세균수의 평균 검출량은 가열조리공정 메뉴, 복합조리공정 메뉴, 비가열조리공정 메뉴 순으로 유의적으로 낮았고(P<0.001), 대장균군수의 평균 검출량은 복합조리공정 메뉴보다 가열조리공정 메뉴가 유의적으로 낮았다(P<0.05). 또한 대장균은 체인점에서 판매한 복합조리공정 메뉴인 시금치나물에서 총 1건(전체의 0.8%)이 검출되었고, 황색포도상구균은 체인점에서 판매한 육개장과 개인업소에서 판매한 쇠고기무국, 취나물, 육원전, 잡채에서 각 1건씩 총 5건(전체의 4.0%)이 검출되었다. 그러나 전체 시료에서 장출혈성 대장균과 살모넬라균은 전혀 검출되지 않았다. 따라서 시판 반찬류의 미생물학적 품질 개선을 위해서는 반찬류의 생산·판매업소에서 원·부재료 구매부터 조리, 냉각, 포장, 보관에 이르는 전 과정의 세부적인 위생관리기준을 마련하고 위생적인 원・부재료의 사용과 함께 종사원이 위생관리 매뉴얼을 잘 수행해나갈 수 있도록 지속해서 교육하고 관리・감독해나가야 할 것이다. This study evaluated the microbiological quality of ready-to-eat Korean dishes sold in grocery stores in South Korea. A total of 126 samples were collected from 29 grocery stores in three cities. The aerobic plate counts, coliforms, Escherichia coli, Staphylococcus aureus, Salmonella spp., and Escherichia coli O157:H7 were evaluated. Results of microbiological quality evaluation of Korean dishes showed that aerobic plate counts were significantly different according to the place of purchase (P<0.05), kinds of Korean dish (P<0.001), major ingredient (P<0.05), and food preparation process (P<0.001) and coliform levels were significantly different according to the place of purchase (P<0.05) and food preparation process (P<0.05). In addition, Staphylococcus aureus was detected in the spicy beef and leek soup purchased from a chain store and the clear beef soup, chwi-namul, Korean meatballs, and japchae purchased from self-managed stores. E. coli was detected in the blanched and seasoned spinach purchased from a chain store. On the other hand, E. coli O157:H7 and Salmonella spp. were not detected in any of the samples. In conclusion, Korean dish manufacturers should adopt detailed sanitation management standards, use sanitary raw materials, and educate employees to follow these standards to improve the microbiological quality of Korean dishes sold in grocery stores.

효율적인 대기정책 마련을 위한 대기질 모델 활용방안 고찰

남기표(Ki-Pyo Nam),이대균(Dae-Gyun Lee),이재범(Jae-Bum Lee),최기철(Ki-Cheol Choi),장임석(Lim-Seok Jang),최광호(Kwang-Ho Choi) 한국대기환경학회 2018 한국대기환경학회지 Vol.34 No.5

Characteristics of Self assembled Monolayer as $Ta_2O_5$ Dielectric Interface for Polymer TFTs

최광남,곽성관,정관수,김동식,Choi, Kwang-Nam,Kwak, Sung-Kwan,Chung, Kwan-Soo,Kim, Dong-Sik The Institute of Electronics and Information Engin 2006 電子工學會論文誌. Journal of the institute of electronics Vol.43 No.1

중합 박막 트랜지스터의 특성은 유기 반도체에 앞서 게이트유전체 표면의 화학적 변형에 의해 조절 가능하다. 화학적 처리는 자기조립 단분자막 형태의 유전물질과 함께 파생된 tantalum pentoxide($Ta_2O_5$) 표면으로 구성된다. Octadecyl trichlorosilane(OTS), hexamethyldisilazane (HMDS), aminopropyltreithoxysilane(ATS) 자기조립 단분자막의 성장은 중합체로 결합된 poly-3-hexylthiophene(P3HT)의 분위기에서 $0.01\sim0.06cm2/V{\cdot}s$의 이동도로 진행되었다. 이동도 향상 메커니즘은 중합체와 자기조립 단분자막 사이의 분자 상호작용에 영향을 미치는 것으로 확인하였다. 이는 향후 ploymer TFT의 유전박막 중 하나로서 유용하게 사용 될 것이다. The characteristics of polymeric thin-film transistors(TFTs) can be controlled by chemically modifying the surface of the gate dielectric prior to the organic semiconductor. The chemical treatment consists of derivative the tantalum pentoxide($Ta_2O_5$) surface with organic materials to form self-assembled monolayer(SAM). The deposition of an octadecyl-trichlorosilane(OTS), hexamethy-ldisilazone(HMDS), aminopropyltreithoxysilane(ATS) SAM leads to a mobility of $0.01\sim0.06cm2/V{\cdot}s$ in a poly-3-hexylthiophene(P3HT) conjugated polymer. The mobility enhancement mechanism is likely to involve molecular interactions between the polymer and SAM. These result can be used for polymer TFT's dielectric material.

KSCI 활용을 위한 지표에 관한 연구

최광남,이재윤,조현양,Choi, Kwang-Nam,Lee, Jae-Yun,Cho, Hyun-Yang 한국과학기술정보연구원 과학기술정보센터 2006 Journal of Information Science Theory and Practice Vol.37 No.2

Methodology Science Citation Index, developed by TS, has been used as an indicator to evaluate academic and research performance in worldwide research environment, as the world goes. With this trend, Korean Science Citation Index(KSCI) databases for domestic journals in the field of science and engineering have been constructed by some institutes such as KISTI, KRF, KOSEF, and so on. Many institutes in Korea are accepting the Impact Factor(IF) and SCI databases, proposed by TS as toolkits for evaluating research capability of their members without any criticism. However, the IF, mostly used as an analyzing tool, has been criticized by many different sectors. The validity of IF has been examined and/or complimented by a case study. In this study various indices as substitutes for IF are scrutinized and examined to maximize the usability of KSCI database. TS사(구 ISI)의 SCI는 최근 들어 우리나라에서 학술적 성과를 반영하는 지표로 선호되고 있다. 국내에서도 일부 기관이 국내 문헌의 인용색인 데이터베이스 구축을 본격적으로 진행하고 있다. 이들 국내 사업의 구축결과가 제대로 결실을 맺기 위해서는, TS사의 SCI 영향력지수가 가지는 한계점을 인식하고 이를 보완하거나 대체하는 다양한 지표를 검토해야 한다. 이 연구에서는 국내 인용색인 데이터베이스가 가진 가능성을 최대한 활용하기 위해서 적용가능한 다양한 지표를 실제 사례와 함께 검토하였다.

삼중 우선순위 큐 MAINTENANCE 알고리즘

최광남(Choi Kwang Nam),홍성수(Hong Seong Soo),심재홍(Sim Jae Hong) 한국정보과학회 1987 한국정보과학회 학술발표논문집 Vol.14 No.2

본 논문은 ATKINSON[1]이 제안한 Double-ended priority queue(MinMaxHeap)를 확장하여 triple-ended priority queue(MaxMinMedianMinMaxHeap : TE-Heap)라는 자료 구조와 TE-Heap에 대한 유지, 관리를 할 수 있는 알고리즘들을 제안한다. TE-Heap 자료구조는 배열을 중위수(Median) 중심으로 왼쪽에는 중위수보다 작은 원소들로 MaxMinHeap을 구성하고, 오른쪽에는 중위수보다 큰 원소들로 MinMaxHeap을 구성한다. TE-Heap 자료 구조를 사용하면 최대값, 최소값, 중위값을 갖는 노드를 O(1)에 검색할 수 있을 뿐만 아니라, 최대값, 최소값, 중위값 재기를 O(log n)에 할 수 있고, 임의 노드 추가를 O(log n), 임의 노드 제거를 O(n)에 할수 있다.

박물관의 생물열화 방제

최광남,Choi Kwang-nam 한국대학박물관협회 1989 고문화 Vol.35 No.-

수침목재의 재질분석에 관한 연구-미시형태적 변화를 중심으로

김윤수,최광남,KIM, Yoon-Soo,CHOI, Kwang-Nam 국립문화재연구소 1986 保存科學硏究 Vol.7 No.-

Micoromorphological alterations of sea-waterlogged woods by marinemicro-oragnisms were investigated by the light and scanning electron microscopy as a part of serial investigations on the shipwrecked materials which were excavated at the sea shore of Wando-Kun, southern coast of Korea in 1984.Deterioration of sea-waterlogged wood by marine microorganisms were varied with the wood species. The degree of deterioration even in the same wood specieswas different according to the part where it was in mud of sea-water. However, the resistance of Torreya nucifera over the marine organisms was marked. Deterioration in cell wall may be classified into three types; thinning of cell wall, separation of secondary wall from compound middle lamella and tunneling of cell wall. Thinning and separation were frequently observed, while the tunneling was rare. Among the wood cell elements of hardwoods, vessel wall was the least deteriorated. The difference degree of degradation of cell wall constituents and the accumulation of inorganic substances in cell lumen indicate that some factors to be considered for the conservation treatment were discussed. The kinds of marine microorganisms invading and/or inhabiting in wrecked wooden ship were also discussed.