체외 충격파 쇄석기에 의해 발생된 음향 흐름 현상 연구

최민주,이승환,홍경진,김호찬,박재우,이헌주 제주대학교 공과대학 첨단기술연구소 2001 尖端技術硏究所論文集 Vol.12 No.2

Acoustic streaming produced by an extracorporeal shock wave lithotripter was visualized for the first time in the present study. It was observed that the streaming velocity increased with the shock wave amplitude and was reaching up to 3 cm/s at the highest output setting of the lithotripter.

가우시안 빔 프로파일의 CPT를 위한 비선형 주사속도변조

최덕규,한찬호,정영헌 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)

A scan velocity modulation(SVM) technique has been widely used for compensating the deterioration of picture quality due to the beam profile effect of the color picture tube(CPT). In conventional SVM system the so-called linear SVM method has been employed, whose modulation velocity is linearly proportional to the variation in the video signal amplitude. However, the effect of picture quality improvement is irregular with video signal amplitude in the linear SVM. In this paper we report a theoretical analysis of the SVM effect on the spatial brightness distribution of CPT according to the variations in luminance signal amplitude and differentiation circuit characteristic. We also propose a nonlinear SVM method based on the results of the theoretical analysis for optimum picture quality improvements. In computer simulation we confirmed uniform improvements in picture quality by the SVM of nonlinear amplitude transfer characteristic.

파일럿 플랜트에 의한 음식물 찌꺼기 처리

최성우,류정숙,박정호,임찬섭,박승조 동아대학교 환경문제연구소 1998 硏究報告 Vol.21 No.1

In this study, using the extinctive composting apparatus, it took a day for the degradation of waste food with high temperature and aerobic condition. It was confirmed by the change of organic ratio, condensed water, and weight. Final production included rare organic ratio so that it was easy to degrade microorganism but it was not enough pH and salt for using compost. During reaction, condensed water was produced about 20 ℓ/day, the eighty percent of waste food was degraded by compositing reaction on the basis of weight, therefore, this means that it is go effective on the volume reduction.

건축 리모델링 프로젝트 리스트 요인 분석을 통한 체크리스트 개발에 관한 연구 : Based on the Analysis of Risk Causes

최병호,구민경,박찬식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

Delay and cost overrun have happened continuously in remodeling projects and domestic constructions do not grasp about the risk's reason for cost and time. Therefore the study derives some risk causes which bring about delay and cost overrun through some documentary records and some interviews. And then it analyzes extracted items by statistical method and divides the items which is produced some consequences those are in beyond degree as a general area and as an important area. Finally, the research suggests the items to improve management of the duration and about checklist.

UR 협상과정과 WTO의 영향에 대한 평가

최찬호 한국농업정책학회, 한국축산경영학회 2000 농업경영정책연구 Vol.27 No.2

The Uruguay Round (UR) on Agriculture was initiated by a small number of exporting countries like the United States, European Union, and Cairns group who were motivated to transfer their internal problems in agriculture to international markets. Although they highlighted the theme of global agricultural reform by comparative advantage and welfare of the all participant, the Round was an unfair game of economic politics in the name of multilateral negotiation that could solve their accumulative problems of over-production, stockpiling, export dumping and increasing subsidies. In fact, the negotiation was prepared in advance by the policy reforms of the leading countries in a way to fit with their own needs and budget capabilities. As the result, the monopolistic power of those exporting countries has strengthened in the international market on the one hand; while deepening the disparities between the rich and poor and food security dependency of many importing countries on the other hand. Unfairness of the Agreement lies in the fact that; export- restrictions and embargos of exporting countries were allowed; but no exemption for importing countries other than admitting tariffication and minimum market access (MMA) in the rule of market access. This paper, in analyzing the nature of unfairness of the Agreement and the impact, on the basis of Korean experiences in order to provide information to those who are concerned in the agricultural arena of globalization.

초중고등학교 행정관리 시스템 설계 및 구축 사례 Easy_SRP System v1.0의 기능

최성,최장의,김승찬,김호성,이종욱,최현식,오영갑 호서대학교 반도체제조장비국산화연구센터 2001 반도체장비학술심포지움 Vol.2001 No.-

현재 초· 중 · 고등학교(이하 ' 학교기관' )에서 산이고 있는 기존의 수작업 방식의 회계관리와 DOS 방식의 행정전산관리 프로그램의 한계점을 벗어나 새로운 GUI 원도우 체계의 프로그램의 개발 필요성이 대두되어 본 시스템을 개발 하게 되었다.또한 학교기관에 납입해야 할 모든 납부금, 급식비, 장부관리에서부터 수입, 지출 등 학교에서 쓰이는 회계부분의 수작업을 모듈화 및 집약화 하고 누구나 쉽게 운영할 수 있는 행정관리 시스템, 일괄처리로 구성하도록 하였으며, DB를 이중모드(사용자 모드와 관리자모드)로 분리, 보안문제를 보충하고, 문서의 표준화로 정보교류의 용이하다.전국 학교기관의 회계운영방식을 표준화하여 구축 설계하고, 초보자 입장을 지향한 순차적 처리방식과 회계관리의 중복처리를 집약화 하여 구축하였다.

메타데이터 관리를 위한 RDF 저작도구

최호찬,김차종 한밭대학교 정보통신전문대학원 2004 정보통신전문대학원 논문집 Vol.2 No.1

오늘날 차세대 웹으로 부각되고 있는 시맨틱 웹을 실현하기 위해서는 모든 웹 문서들이 메타데이터 (metadata) 형식에서 정의하고 있는 시맨틱(semantic), 구문(syntax), 구조(structure)를 모두 수용할 수 있는 통합론 구조가 필요하다. 본 논문에서는 이를 위한 방법으로써 W3C에서 메타데이터의 기술과 교환을 위한 프레임워크로 개발한 시맨틱 웹의 핵심 기술 중의 하나인 RDF문서로 변환하여 상이한 메타데이터들을 효율적으로 관리하고 이용할 수 있는 RDF 저작도구 설계에 대하여 연구하였다. 본 RDF 저작도구에서는 Dublin Core 메타데이터를 이용한 RDF 생성, XML 문서를 RDF로의 변환, RDF를 NTriple형테로 표현, 웹 서비스 메타데이터인 WSDL과 RDF와 통합에 관하여 설계하였다. 본 논문에서 설계한 RDF 저작도구를 이용하여 사용자는 세부적인 내용을 몰라도 메타데이터를 쉽게 통합하고 관리할 수 있다. Recently, the semantic web stands out in the next generation web. Toe realize the semantic web, the metadata integration is required between different metadatas on the web for metadata management. Otherwise, the integrated structure is needed to accommodate all of semantic, syntax and structure. RDF is noe of the core technology and is more efficient framework for technology and interchange of metadata in the web. In this paper, for metadata management, we designed and implemented the RDF authoring system which converts each of metadata into RDF and makes it easy to manipulate and manage the differenct metadatas. For this, we research about the RDF creation using Dublin Core metadata, the conversion of XML document into RDF, the RDF expression by N-Triple form and the integration of WSDL and RDF. Basically, users using RDF Authoring Tool can integrate and manage metadatas easily even if they are not expert.

수상관의 밝기 및 해상도를 고려한 기준 백색 설정

최덕규,한찬호,정영헌 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)

Reference white in color television receiver can be achieved by adjusting the RGB gun current ratio and it is necessary to provide additional gain ratio adjustment for the RGB video signal. Generally, the gun current density profile has a Gaussian distribution and the gain-bandwith product of RGB channel amplifier is constant. Therefore brightness and spatial resolution are changed with variations in reference white of receiver. In this paper, the effect of RGB gun current and channel gain ratios on brightness and resolution of CPT is analyzed. Brightness is increased with the color temperature of reference white because of Holmholtz-Kohlrausch effect. The change in light output is more abrupt and spatial resolution is improved with unity current ratio. For more bright and improved resolution we also present the range of color temperature of reference white for P22 phosphors.

적외선 흡수 분광법 및 DPC를 이용한 치과용 수복재의 광중합 거동 분석

정찬문,김중곤,최준호,장두옥,김경남,김광만 대한치과기재학회 1998 대한치과재료학회지 Vol.25 No.1

Mechanical properties of compomers would be obtained mainly by photopolymerization by visible light irradiation. Photopolymerization behavior of two commercial compomers was investigated by FT-IR spectral analysis and differential photocalorimetry(DPC). The results obtained were as follows: 1. From FT-IR analysis, it was found that the compomer products were photocured mainly by radical polymerizations of multifunctional methacrylate monomers. Final conversion values of the polymerizations after exposure to visible light for 60 sec were 67% for Dyract and 59% for Compoglass. 2. Upon exposure the compomers exhibited autoacceleration and autodeceleration, which are usually observed in bulk polymerizations of multifunctional monomers. 3. Dyract showed higher rate of polymerization and conversion of double bond than Compoglass.

개에서 발생한 수컷 가성 반음양 1례

이기찬,손정민,윤기영,최호정,박성준,이영원,정성목,신상태,조종기 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2006 動物醫科學硏究誌 Vol.14 No.-

In this report, we present a case of the male pseudohermaphrodite in a beagle dog. The animal was subjected for examination due to enlargement of clitoris that was shown as reddish finger-like structure protruding from the vulva. Visual examination of the internal genitalia revealed that the animal possessed both testes and uterus. Based on the findings of physical examination and exploratory laparotomy, it was tentatively diagnosed as male pseudohermaphrodite. Internal genitalia and enlarged clitoris were removed for the prevention of pyometra and Sertoli cell tumor.