특이혈청항체 IgG 분획(分劃)이 Streptococcus mutans의 평골면(平滑面) 부착(附着)에 미치는 영향에 관한 연구

김찬수,하윤문,이진용,최유진 대한미생물학회 1982 大韓微生物學會誌 Vol.17 No.1

In order to demonstrate the effect of specific serum IgG antibody on the adherence of Streploco- zcus witarrs to smooth surface and the mechanism of effective adherince inbibition by IgG antibody, in the prepent study authors obtained purified 1'gG from different immunogen preparatiohs of S. mufans KCTC I04.49 (serotype c) and observed the effect of each IgG preparation on the adherence of each,S, virstans strain cultured in different conditions. In additiov, the presen( study was under- taken to observe the cross-reactivity of IgG and the eftect of sucrose concentration on the adherence of S. )eutpns in vitro non-growth conditian. The adherence of S. mutans to glass surface was effective]y inhibitecl by serum IgG antibody. At the same IgG concentrations, anti-2Fo fructose grown/1 N NaC1 washedI S. mutans NCTC lp449 cell showed greater a'dherence inJubitory effect to S. mutans strains .than anti 2Zo sccrose grown- .and anti-S. ruutans NCTC 10449 cell wall, and the greater inhibitory effects of Ig6 preparations were observed ia assay using 2z fructose grown S. mutans celI preparations tban using 0. Ip; uarose grown cell preparations. These results suggest that the more effective adherenee inhibition by serum IgG antibody is due to the reaciion with S. mutans cell surface antigens rather $lt;bpn glucan and celI-associated gIucosyltransferase. The greatest adherence inhibitory effeci. Of IgG to S. mulans strains was observed on homologous NCTC 10449 strain ancl the inhibition crogs-reactivities were observed betweein serotype c, e, and f strains. More pronounced cross-reactivity of adherence mhibition oI IgG to S. mutans vas observed in assay using anti-Zi fructose grown/I N XaCl wasbcd cell than using other IgG preparations, and observed in assay usmg 2.$quot;o fructose grosvn S. mutar:s cell preparations thRA'. 0, I a sucrose grown cef.l preparations. It was ir!terested that low, but adequa$lt;e concentration of reactive Igg antibody significantly increased the adherence ability of S, mgtaggg, This result may be due to the formation of srnall cell aggregates resulfed in a iaereage in tJ:e numbers af organisms whieh adhered to glass surface. The adherence of S. mutans to glass surface was possible in the a$sence of gluean-synthotie activity. Low level of sucrose sigdifkaetl increased the. Adherence ability vf S. mutans to glass surface, but excessive amount of suerose indueed Jarge cell aggr,egates reeulted in a decrease in the,aumbers of orgaaism which adbered.

음악교과서에 나타난 가창악곡의 음역과 정신지체아동의 음역 비교

김찬수 국립특수교육원 1994 특수교육연구 Vol.1 No.-

We have not proper music textbook fit for children's ability in a special school for mentally retarded children. Under this circumstances, they use music textbook which is used in a ordinary school. So, they have difficulty in doing so. Therefore, I make a study of their musical talent centering around musical range which takes up important part in singing, which occupy most important part in their musical activity. For this study, I inquire into musical range of 425 musical pieces which are included in music textbook of ordinary elementary school, middle school, and high school and collect and analyze musical range of 115 retarded children who are students in the special school. The outcome of this study is that the more they high in degrades, the more their musical range and musical piece's go up. But musical range of middle school student is rather narrow because of their puberty. And boy children's musical range is narrower than girl children's down's snydrome children's is narrower than other mentally retarded children's. Children's is narrower than musical piece's. So I conclude that musical pieces of ordinary music textbook is not suited for their musical ability. So I suggest that out of 425 pieces, 5 musical pieces which are availabie for aid and 96 pieces which are from key shift that are suitable for average musical range of mentally retarded children. But musical piece is of so small number, is not so variable that we nust develop musical textbook suited for their ability and spread it. For magnifying their musical range, they have to practise musical range and we must guide their vocalization.

타원형 및 원형 평판의 자유 진동 ( Free Vibration of Elliptical and Circular Plates )

김찬수 대한기계학회 1992 대한기계학회 춘추학술대회 Vol.- No.-

태양집광기형 자연채광장치의 개발실태에 관한 연구

김찬수 慶熙大學校 大學院 2000 高凰論集 Vol.27 No.-

제주도 목본식물자원의 분포특성

김찬수,손석규,도재화,정진현,김지은,황석인 한국자원식물학회 2007 한국자원식물학회지 Vol.20 No.5

- In this paper, it was discussed situations and necessities of conservation management strategy for the woodyplants resources in Jeju Island. Out of 320 taxa of the woody plants distributed in Jeju, there were 62 families, 136genus, 279 species, 28 varieties and 13 forma. Conifers, gymnosperms, were 3 families, 5 genus and 7 species as holding2.2% of total woody plants. Broad leaves, angiosperms, were 59 families, 131 genus, 272 species, 28 varieties and 13forma that were 313 taxa. Evergreens were 84 taxa consisting of 31 families, 45 genus, 72 species, 7 varieties and 5forma that make up 26.8% out of total angiosperms. Deciduous were 229 taxa (73.2%) consisting of 42 families, 93genus, 200 species, 21 varieties and 8 forma that were 122 trees (38.1%), 177 shrubs (55.1%) and 21 vine plants (6.8%).Life form spectra by dormancy, disseminule, radicoid and growth form were analysed. Thirty eight taxa including 17families, 21 genus, 14 species and 16 varieties out of 320 taxa growing Jeju were endemic to Korea and 22 taxa of themwere endemic to Jeju. The specific plant species among the woody plants in Jeju were 10 taxa in V grade, 24 taxa in IVgrade and 53 taxa in III grade. These are correspondence to those of nations as 12% of V grade, 7.6% of IV grade and17.2% of III grade.Key words - Jeju Island, Woody plants resources, Life form, Endemic

한국농업생산의 기술변화에 관한 연구

김찬수 京畿大學校 韓國産業經濟硏究所 2003 産業硏究 Vol.16 No.-

국방핵심기술 연구개발의 기술성숙도 평가 적용에 관한 연구

김찬수,박경진 대한산업공학회 2009 대한산업공학회 춘계학술대회논문집 Vol.2009 No.5

미항공우주국(NASA)에서 처음 제안한 기술성숙도평가(TRA:Technology Readiness Assessment)와 기술준비수준(TRL:Technology Readiness Level)에 관하여 분석하여, 국방핵심기술 연구개발 제안서평가와 성과평가에 적용 타당성을 연구하였다. TRA 활용으로 정량적 성과달성 기준을 명확히 하여 평가의 객관성과 전문성을 제고하고, 기술개발 결과에 대한 신뢰성 있는 평가와 체계개발 적용 연계성에서 연구개발의 위험도를 줄일 수 있는 것으로 판단된다.

친환경 수소철도차량 기술개발 동향

김찬수,김성동 한국철도학회 2020 철도저널 Vol.23 No.2

게임물등급위원회의 발전방향 모색

김찬수,박태순 한국콘텐츠학회 2007 한국콘텐츠학회논문지 Vol.7 No.4

Recently, Game Rating Board has been established. It is to follow worldwide trend in building up publicity, autonomy and professionalism under the framework to assure freedom of expression. This article analyzed major nation's game rating system, and showed some points to need improvement which are to have more detailed classification in game rating, to modify contents descriptor, to appoint committee members with expertise on game, to revise articles to be capable of misuse, and to become a nongovernmental organization. 최근에 우리나라에 게임물등급위원회가 발족하였는데, 이는 표현의 자유 보장이라는 큰 틀에서 정보제공, 자율성, 전문성 강화를 도모하는 세계적인 흐름과도 맞아 떨어지는 것이었다. 다만, 몇 가지 세부적인 측면에서 문제점들을 가지고 있음이 분석되었고, 따라서 개선되어야할 점이 드러났다. 그것은 등급의 세분화, 내용정보제도 보완, 전문성 강화, 독소조항 개선, 순수 민간자율화 추진 등으로 게임제도의 선진화를 위한 향후의 과제로 나타났다.

6자유도 가상 체험기의 설계 변수에 관한 연구

김찬수 한국차세대컴퓨팅학회 2011 한국차세대컴퓨팅학회 논문지 Vol.7 No.6

본 논문에서는 6자유도를 갖는 가상 체험기를 설계하기 위하여 설계 변수를 최소한으로 감소할 수 있는 방법을 제시하였다. 기구의 크기 변화에 대하여 모든 조건수(condition number) 성능 지표와 병진속도에 대한 동작성(manipulability) 성능 지표는 불변성을 갖고 있음을 보였다. 조인트 위치의 평면성 및 대칭성 가정과 크기 변화에 대한 성능지표 불변성을 이용하여 제시된 중요한 설계변수는 상판의 유사정육각형을 외접하는 원의 반지름, 하판의 유사정육각형의 반각 와 상판의 유사정육각형의 반각, 초기 위치에서 상판의 높이 로 감소할 수 있음을 보였다. 또한 성능지표를 구하기 위하여 사용되는 네 개의 부분 행렬들을 제시된 설계 변수를 사용하여 유도하였고, 이 행렬을 사용하여 피해야 할 특이 형태를 갖는 설계를 제시하였다.