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서울의 Penicillinase Producing Neisseria Gonorrhoeae 발생빈도(1996)
김재홍,황동규,전재홍,김윤석,김중환,김용준,이창균,임동진,김현수,조창근,김경문,박상훈,전우형,김희성,이호정,차명수,김갑형,김형석,김석우,황지환,박병순,권오상,이민수,송기훈,성소영,이인섭,부태성 대한화학요법학회 1999 대한화학요법학회지 Vol.17 No.2
Background : In recent years, gonorrhea has been panedemic and remains one of the most commom STDs in the world, especially in developing countries. Objective & Methods: For the detection of a more effective therapeutic regimen and assessing the prevalence of PPNG, we have been trying to study the patients who have visited the VD Clinic of Choong-Ku Public Health Center in Seoul since 1980 by means of the chromogenic cephalosporin method. Results: In 1996, 139 strains of N. gonorrhoeae were isolated, among which 53(39.0%) were PPNG. Conclusion: Our results suggests that after a peak of 74.3% in 1993, the prevalence of PPNG in Seoul is gradually declining.
조업 조건에 따른 이트륨 옥살레이트 결정의 성장 메카니즘 및 속도
성민현,김우식,김준수 慶熙大學校 材料科學技術硏究所 1998 材料科學技術硏究論集 Vol.11 No.-
Crystal growth of Yttrium oxalate seed crystals in supersaturated solutions has been studied EDTA titration method. Growth rate for Yttrium oxalate crystals was determined from de-supersaturation curve of solution in agitated reactor. Change of growth mechanism and rate of yttrium oxalate crystals on agitation speed and concentration of additive were investigated. Experimental method are suggested to determin the parameters in the simple two-step model and factors which influence the mass-transfer and surface-reaction coefficients are identified. Then the controlling step of crystal growth process is judged from the effectiveness factor. Firstly, growth rate was increased with increasing agitation speed, but exponential constant wasn't change with increasing agitation speed. As this result, linear growth rate were first-order at high supersaturation, that is, growth rate controlled due to mass trasfer step in high supersaturation solution. Finally, studing on effect of additive, growth rate were decreased with increasing concentration of additive, but exponential constant were increased. Then the individual rate constants, kd and kr, were determined from the simple two-step model. In addition, using effectiveness factors, growth rate were measured of the degree of mass-trasfer or surface-reaction control.
성정훈,강대원,이윤수,임준우,홍영호,이덕동 경북대학교 센서기술연구소 1998 센서技術學術大會論文集 Vol.9 No.1
High selective and sensitive thick film type methane gas sensors were fabricated and their sensing characteristics for various hydrocarbon gases were investigated. Raw material, SnO_(2)/Au, prepared by coprecipitation was even grain size. SEM, TEM, BET and XRD analyses were carried out for investigation of surface morphology and crystalline structure. The thick film devices using the above materials exhibited high sensitivity to methane gas at the operating temperature of 400°C. The sensitivity of SnO_(2)/Au+Pd thick film devices to methane gas was higher than that to the other hydrocarbon gases such as iso-butane and propane. The optimal adding amounts of Au and Pd were 1wt.% and 3wt.%, respectively. The sensitivity, S, is defined as {(R_(A)-R_(G))/R_(A)}><100, which R_(A) and R_(G) are resistance in air and that in the gas ambient, respectively.
Ethylenediamine-N, N'-di-α-isobutyric Acid의 Cobalt(Ⅲ) 착물의 합성
전무진,박장우,최승락,박광하 연세대학교 자연과학연구소 1987 學術論文集 Vol.18 No.-
주게전자가 ONNO인 네자리 리간드, ethylenediamine-N, N'-di-α-isobutyric acid(eddib)를 합성하고 이 리간드의 디클로로 코발트(Ⅲ) 착물을 공기산화법에 의하여 합성하였으며 이 착물의 uns-cis이성체와 s-cis이성체를 이온 교환 크로마토그래피법에 의하여 분리하였다. 그리고 eddib의 디클로로 코발트(Ⅲ) 착물을 용액중에서 Co(eddib)L^n+(L=Cl·H_2O,CO_3^2-, (H_2O)_2)로 치환반응을 시켰을때 이들의 전자흡수 스펙트럼의 흡수띠 위치가 분광학적 계열과 일치함을 알 수 있었다. A new flexible N_2O_2-type tetradentate ligand, ethylendiamine-N, N'-di-α-isobutyric acid (eddib), has been synthesized, and dichloro cobalt (Ⅲ) complex of eddib has been prepared via the airation method. The geometric isomers of the complex, s-cis and uns-cis isomers, have been separated through ion exchange chromatographic method. Aseries of cobalt (Ⅲ) complexes of eddib, [Co(eddib)L]^n+ (L=Cl. (H_2O), Co_3^2-, (H_2O)^2) have been prepared in solution. In their electronic absorption spectra, the absorption maxima and their intensities of the above series of complexes are on the ordinary line of the spectrochemical and hyperchromic series. Elemental analysis, IR, NMR and electronic absorption spectra have been used to characterize the complex and geometries of the complex.
환경교육을 위한 웹 기반 프로젝트 학습 시스템의 설계 및 구현
전우천,정효숙,김동용,엄종진,정성모,최수경 서울교육대학교 2001 한국초등교육 Vol.12 No.2
The use of the Web (World Wide Web) has been changing roles of traditional education style. Especially, the Web can overcome time and space limitations in the traditional schools. Teachers and students are now using the Web to access vast amounts of information and resources on cyber space. Also, the learning via the Web enables both synchronous and asynchronous communication. Despite of many benefits of the Web, it may weaken students motivation due to lack of face-to-face communication. In this paper, we provide a learning model called Web Project Learning, which is based on the contructivism, to provide motivation and collaborative learning for students in the Web environment. The model is based on the Project-Based Learning model and is revised for use in the Web. The model can also encourage the participation of parents as well as students, and be applied to any subject. We implement our model and show that the model can be used for environmental education as an instance.
유입 전염병 열대열(Plasmodium falciparum) 1예
우준희,이지윤,최창현,홍성태 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.2
Recently the prevalence of malaria has been increasing around the world and there is an increasing concern about exogenous malaria in non-endemic areas, We experienced a case of imported malaria(Plasmodium falciparum) in a 37 year-old Koran male. The management with chloroquine was successful and wish to report this unusual case, along with a review of literatures.
우준희,조용균,김은옥,채종일,김양수,양성연,유지소,이성순 대한감염학회 1997 감염 Vol.29 No.1
최근 외국으로의 여행이 빈번해지면서 유입 감염되는 경우가 많아지고 있는 추세이며 임상 증세가 말라리아와 유사하여 다소 진단이 어려울 수가 있어 한번쯤 바베시아증을 생각하는 것이 바람직하겠다. 저자들은 아프리카에 다녀온 뒤 나타난 바베시아증을 경험하였기에 문헌고찰과 함께 보고하는 바이다. Babesiosis is a tick-borne, malaria-like illness caused by Babesia species that infect erythrocytes of mammals incidentally. The family Babesiidae is characterized by consisting of nonpigmented intraerythrocytic parasites that reproduce within erythocytes by asynchronous, asexual budding into two or four daughter cells (tetrad). We experienced a case of human babesiosis presenting fever and chills. The patient was a 49-year old man, who had been in Africa (Ethiopia, Uganda). Three weeks before admission intermittent spiking fever had developed, which had been accompanied by severe chills. The peripheral blood smear (Giemsa-stain) revealed characteristic forms of a intracellular quadraple parasite compatible with Babesia. The patient was improved significantly by the treatment with quinine and clindamycin for a week.
우성준,김광호,유명춘,하진영 강원대학교 정보통신연구소 2008 정보통신논문지 Vol.12 No.-
Although information technology has been developed fast, large amount of machine printed document images are not properly handled due to immature document layout analysis techniques. Previous research has focused on character recognition itself to improve character recognition accuracy. Recently, however, some efforts are made to analyze complex document layout automatically. In this paper, we propose document layout analysis and understanding method for various Hangul document images. Skew detection is performed using projection profile and connected component layout information. Top-down and bottom-up methods are combined to analyze document layout. After text region and non-text region determination, table is further processed to extract row, column, and cell position. We got very high performance for skew correction, zone detection, and table processig from experiments with various Hangul document images.