마이크로파 여기 플라즈마광 생성을 위한 도파관 시스템 설계에 관한 연구

전상재,전후동,송창현,하석영,이승혁,이태호,박의준 금오공과대학교 2005 論文集 Vol.26 No.-

In this paper, the plasma lighting system(PLS) excited by the commercial high power magnetron is developed. The design concepts are based on maximizing the huninous efficacy in conjunction with the miniaturization of waveguide system Furthermore the fine tuning is simplified by using only one stub, and the impedance matching is maximized by introducing the tapering technique. The experimental results show that the luminous efficacy can be dramatically improved by the proposed design method.

FPD 결함검사를 위한 Vision Inspection System 설계에 관한 연구

박성재,김민수,김준식,주효남 湖西大學校 工業技術硏究所 2005 工業技術硏究所論文集 Vol.24 No.-

A system is designed and developed to acquire accurate images and to detect cell defects of Flat Panel Displays. Detailed analysis and experiments are performed to design and select the lighting, optical and camera sub-system as well as mechanical motion and position control sub-system. Sample images are acquired using the developed system and the processed result shows the good performance in detecting simple cell defects.

XML Signature를 이용한 XML 문서의 암호화와 전자서명 모듈 설계

박수범,강흥식,김상균 인제대학교 2002 仁濟論叢 Vol.17 No.1

In this paper, We propose XML Signature based Encryption and Digital Signature Module for XML Document. Structural method of XML(eXtensible Markup Language) Documents take a good deal of advantage that application use both of content and meta-data. Many Vendors and W3C(World Wide Web Consortium) are going to take a effort that progress XML application. however, during transmitting XML document on Internet, it is viewable by anyone like as general HTML document. If we would keep XML contents from invasion of privacy, then must protect XML document from intrusion. So, we make good use of encryption technique for concealing text node of XML element, and the support of digital signature is XML Signature of W3C.

신경망을 이용한 침입탐지 시스템 구현

강병두,강흥식,김상균 인제대학교 2002 仁濟論叢 Vol.17 No.1

Intrusion detection systems based on rules are not efficient for mutated attacks, because they need additional rules (or the variations. In this paper. we propose an intrusion detection system using the time delay neural network. Packets on the network can be considered as gray images of which pixels represent bytes of them. Using this continuous packet images, we construct a neural network classifier that discriminates between normal and abnormal packet flows. The system deals well with various mutated attacks, as well as well known attacks.

암호화 채팅 서비스에 대한 연구

강병두,강흥식,김상균 인제대학교 2002 仁濟論叢 Vol.17 No.1

The existing chatting service have not security policy like as electronic commerce. During chatting, the private informations(credit card number, account number, password etc.) are exposed to network intrusion. So, we need the encryption to protect data from invasion. There is a Safe Talk, a chatting program for encrypted chatting service. This chatting program use ElGamal public key algorithm to generate and exchange session-key using DES algorithm. And we discuss this program for evaluating concealed network data exchange.

신경망을 이용한 내용기반 이미지 분류

이재원,강홍식,김상균 인제대학교기초과학연구소 2001 자연과학 Vol.5 No.-

본 논문에서는 내용기반 이미지 검색의 한 방법론으로써 웨이블릿 변환과 신경망을 이용한 방법을 제안한다. 분류 대상 이미지는 인터넷상의 다양한 이미지 중 전경과 배경의 구분이 뚜렷한 객체 이미지이다. 분류를 위한 특징은 웨이블릿 변환 후 추출된 형태 특징과 질감 특징을 이용한다. 추출된 특징 값들을 이용하여 이미지들에 대한 학습 패턴을 생성하고 신경망을 학습하여 분류기를 구성한다. 본 연구에서는 다양한 질감 특징 중 가장 높은 인식률을 보여주는 대비를 사용하였으며, 신경망의 학습 알고리즘은 역전파 알고리즘을 사용하였다. In this paper, we propose a method of content-based image classification using waveiet transform and neural network. The images for classification are object images that can be divided into foreground and background. Features for the classification are texture and shape features extracted from wavelet transformed image. The neural network classifier is constrycted with the extracted features and the back-propagation learning algorithm. Among the various texture features, the contrast was more effective.

農民技術受容에 影響을 주는 要因의 比較分析 : 關係機關과 情報傳達媒體를 中心으로

鄭址雄,崔敏浩,金性洙,徐圭善,李昶植 서울大學校 農科大學 1984 서울대농학연구지 Vol.9 No.2

The purpose of the study was to analyze the variables affecting farmers' adoption process of agricultural innovations in Korea. Specific objectives of the study were to ; (1) review the adoption process and the variables associated with this process, (2) investigate the rate of adoption of selected agricultural innovations in the fields of rice production, animal husbandary and horticulture, (3) analyze communication media and change agencies or institutions which affected the adoption of agricultural innovations, and (4) identify the relations of the farmers' adoption and communication exposure behavior. Data for the study were collected from 393 cluster sampled farmers out of selected 17 rural villages in Korea. Five graduate students and three faculty members of Seoul National University participated in conducting interview with pre-tested questionnairs. The data were analyzed by HP 3,000 computer in the College of Agriculture, Seoul National University. Major statistical techniques used for the study were frequency distribution, chi-square and discriminant analysis. Statistical significance was tested at .05 level. The major findings of the study were as follows : 1. Variables associated with the agricultural adoption process were classified into the following six categories ; (1) perceived characteristics of agricultural innovations, (2) personality and characteristics of adopters, (3) the patterns of communication media or channels, (4) efforts of change agents. (5) priorities in agricultural development policies, and (6) characteristics of social system. 2. Rats of adoption were about 83% in application of silicate fertilizers on rice seed bed, 41% in feeding calf starter known as artificial milk to calves, 56% vinyl mulching practices in vegetable cultivation, and 67% in spreading raw rice straw on paddy land to improve soil conditions. 3. Time lag between awareness and adoption appeared to be about seven months in application of silicate fertilizers on rice seed bed, and about a year in feeding calf starter. 4. Change agent interpersonal communication revealed to be the most important factor affecting farmers' awareness in application of silicate fertilizers on rice seed bed, in feeding calf starter, and in spreading raw rice straw on paddy land, while localite interpersonal communication in vinyl mulching practices in vegetable cultivation. 5. Change agent interpersonal communication appeared to be the most important factor affecting farmers' adoption in application of silicate fertilizers on rice seed bed and in feeding calf-starter, Localite interpersonal communications were more important in vinyl mulching practices of vegetable cultivation and in spreading raw rice straw. Localite interpersonal communications were more important factor at adoption stage than at awarenss stage. 6. Agricultural extension agencies appeared to be the most important factor affecting farmers' adoption in application of silicate fertilizers on rice seed bed, in feeding calf starter, and in vinyl mulching practices. Based on the results of this study, the following are recommended for further development of agricultural extension services and effective adoption process of agricultural innovation. 1. The variables associated with the agricultural innovation decision process should be taken into consideration to improve effectiveness of change agencies or agricultural extension services. 2. Effective use of communication media along with the feedback messages from the change agency as well as client system be considered to increase effectiveness and meaningfulness of both systems. 3. Innovative agricultural research be continually sharpen its focus on the highest priority needs of client system by utilizing feedback from farmers through the communication link of change agents. 4. A long-term educational approach by using various communication media be emphasized, and regular field survey on innovation-decision process will prevent discontinuance of innovations.

조혈모세포이식을 받은 급성 골수 백혈병 환자에서 발생한 cyclosporine에 의한 양측 시신경병증

정진권,김한조,박명진,하승주,최경식,이성진,박성희,이상철,이남수,박희숙,원종호 순천향대학교 의학연구소 2007 Journal of Soonchunhyang Medical Science Vol.13 No.2

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Heavy metal concentration of laver Pyropia sp. on the processing and marketing steps in Korea

Sang In Kang,Minchul Yoon,Mira Jo,Woo Seok Choi,Kwang Tae Son,Tae Seek Lee 한국수산과학회 양식분과 2017 한국수산과학회 양식분과 학술대회 Vol.2017 No.5

African Policy of the People's Republic of China

Sang Seek Park(박상식) 한양대학교 아태지역연구센터 1982 중소연구 Vol.6 No.3