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.

서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

한국지상파방송사의 사업다각화에 따른 문제점과 개선방안

황상재 한양대학교 사회과학대학 2002 社會科學論叢 Vol.21 No.-

Business diversification is one of strategies for terrestrial broadcasting companies, which have dominated the broadcasting industry, to cope with the drop of market share and to reinforce the competitiveness. The present study examined the current state of business diversification of terrestrial broadcasting companies (KBS, MBC and SBS) in Korea, and described problems in the strategy and their solutions. According to the result of investigating the state of business diversification promoted actively by terrestrial broadcasting companies, which were in harsh competition for market share with new medias such as cables and satellites in the changing environment of the broadcasting industry, to restore their dominant position in the market, it appeared that SBS had 12 subsidiary companies, MBC did 10 and KBS did 6. When the strategy and state of business diversification of the three broadcasters were analyzed according to the type of ownership, the following results were produced. First, based on the value chain of the broadcasting industry, the subsidiary companies owned by each broadcaster can be grouped into those for vertical diversification, those for horizontal diversification, and those for conglomeration. Each subsidiary company was classified according to its business areas presented by the company. According to the result, KBS appeared to have 2 subsidiary companies for vertical diversification, 2 for horizontal diversification and 2 for conglomeration. As for MBC, 3 were classified as those for vertical diversification, 5 for horizontal diversification and 2 for conglomeration. SBS had 3 for vertical diversification, 5 for horizontal diversification and 4, which were not directly related to broadcast production, for conglomeration. It was considered inappropriate to regard the strategy of diversification of terrestrial broadcasting companies in Korea as a part of rational management strategy based on sufficient investigation of the market. As shown in the case of Sky KBS, which was exposed to many problems and on the verge of collapse as soon as it was launched due to excessive investment of capital and manpower, the degree of irrationality appeared to be higher in public-financed broadcasting companies. Thus the following problems and their solutions were proposed. First, the strategy for promoting diversification and the promotion system are imperfect. Broadcasting companies do not have a strategy or have only a superficial strategy for promoting business diversification. This fact is supported by lack of organization and manpower in charge of business diversification in the broadcasting companies. Second, there are few tactics for enhancing synergy. In managing subsidiary companies, the parent companies emphasize transferring responsibility and autonomous operation, but there are insufficient sharing of marketing activities and strategic resources between the parent and subsidiary companies. Third, subsidiary companies also deteriorate their own, competitiveness by excessively relying on the parent companies rather than conducting responsible business. Another factor detrimental to the competitiveness of subsidiary companies is that the management of subsidiary companies is filled up by those from the parent companies who do not have a business mind.

실리콘樹脂를 利用한 文化財保護被膜에 對한 硏究

黃正儀,朴斗元,吳相午,鄭倧在,朴裕哲,郭永佑 慶北大學校 1977 論文集 Vol.23 No.-

金屬실리콘과 鹽化메틸을 鹽化第一구리를 觸媒로 하여 메틸실란을 合成하고 메틸실란을 加水分解하여 실록산의 被膜을 만드는 方法을 調査하였다. 이들 被膜이 文化財 保護被膜이 될 수 있는가를 檢討하기 爲해서 材料를 文化財의 材質인 몇 가지 物質에 適用하여 膜의 性能을 調査하였다. 特히 撥水效果, 汲水量 耐久性等을 調査하였으며 外觀上 아무런 變化가 없는 좋은 被膜이 될수 있다는 結果를 얻었다. The organohalogensilicone was synthesized metal silicone and methylchloride applying the direct synthetic method using copperous chloride as catalyzer. The synthesized organosilane was hydrolyzed to siloxane by various method and coated on various materials which are composed of the cultural assets. The coating film was examined to decide whether it is profitable one to protect the assets from efflorescence or air pollution. Referring to the water repellency, permiability of water and the weather test of the film it was qualified that this film was good enough to apply to the cultural assets as protecting film.

퍼지 추론을 이용한 분류 벡터 양자화기의 성능 개선

황병하,김혜숙,서재성,박민식,곽훈성 全北大學校 1994 論文集 Vol.37 No.-

In Classified Vector Quantization(CVQ) for image coding, the block classification pondering the block characteristics will be the most important procedure if we consider system performance. But it does not take effect because classification of conventional CVQ followed act on a heuristic and statistics method. In order to solve the problem of conventional methods, i.e, for block classification effectively we propose a fuzzy inferencing algorithm to improve its performance. To do this, fuzzy rules must be generated in the first. Our rules are based on energy distribution in transform domain with respect to spatial variation. Ultimately fuzzy inferencing of this paper apply these fuzzy rules for efficient block classification on a input image. As a result of efficient classification, our proposed method shows that blocking effect is decreased and PSNR(peak to peak signal to noise ratio) is increased by about 1 ∼ 2 dB for 0.2 ∼ 0.6 bpp range, when the performance is compared with Aizawa's scheme^[9].

토글-회전관성댐퍼를 이용한 구조물의 성능개선

황재승,이상현,송진규,홍성목 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

This paper presents a new vibration control device by which the mass and damping of a structure is increased equivalently. The vibration control system, named toggle-rotational inertia-viscous damper, can be utilized effectively in applications of small structural drift. Numerical analysis shows that because the relative drift of a structure can be effectively amplified by the toggle system, the device has a great performance in the vibration control without the increase of the damper capacity and size. It is also observed that vibration control effects is caused by the increase of equivalent mass and damping due to the rotational inertia and damping of the device.

텍스트 마이닝을 이용한 웹 문서의 자동 분류

황재문,정성환 國立 昌原大學校 精報通信硏究所 1999 精報通信論文集 Vol.3 No.-

Recently, as spreading of computer supplement and development of communication technology using network, the web users have rapidly increased in number on Internet environment. Then, new technology development to efficiently classify and retrieve this increasing information is necessarily required. In this paper, we propose a method of information classification with text-mining technique based on the document indexing method using representative keywords for efficient information retrieval. In the experimental results using total 1,200 Korean language articles of 4 categories, the proposed method shows average about 95% performance except information communication category in the classification rate.

폐전선 피복재 건류탄을 이용한 제강분진처리를 위한 기초연구

황용길,이상화,이성룡,정석수,최재신,조충형 東亞大學校 1995 東亞論叢 Vol.32 No.-

Distilled carbon from waste electric wire coated by vinyl is used to recover valuable metal such zinc, lead and iron in dust. Pemeability and compressive tests are who done to present basic data on extraction of zinc in dust. Experimental results obtained from sintering property of steelmaking dust, distilled carbon from waste electric wire coated by vinyl and waste pulp sludge mixture briquet at various sintering temperature are as followings; Permeability is increased as increasing distilled carbon and pulp amount at higher temperature than room temperature condition. Compressive strength at room temperature is increased as increasing distilled carbon and decreasing waste pulp amount, but decreased as increasing temperature and waste pulp amount. Weight Loss reaction experiment is increased a increasing distilled carbon and waste pulp amount. ZnO and Fe₃O₄ are obtained from sample containing ZnO, Fe₂O₃ and ZnO at 800℃. Permeability test at 500℃ and 800℃ did not well, because of 13.3% CaO in distilled carbon. Sample because semmi melted state at 1000℃. Distilled carbon obtained from waste electric wire showed effect of reduction and flux material.

시각적 감도를 고려한 영상의 비트량 제어

황재정,오성택 群山大學校 1996 論文集 Vol.23 No.-

Image data is necessary to be reduced to solve the problem of storage media capacity and to efficiently use channel bandwidth for storing and transmiting multimedia data. In this study, we present an image coder using variable quantizer for the JPEG extensions named as ISO/IEC 10918-3 (also as ITU-T Rec. T.84). It is necessary to alleviate the blocking artifact which is more sensitive to human eye in view of the spatial frequency sensitivity and to visually control bit allocation in an image. Since the blocking artifact arises in the lower activity area rather than in the higher area. The block activity is referred to quantize a block and to control buffer status. An image is composed of slices, while a slice is composed of 8 ×8 blocks. Hence we optimize the bit assignment in an image at a given bit rate. As a result of simulation for various images, the proposed coder increases subjective and objective quality.

Scale Invariant Feature Transform을 이용한 눈동자 영역 추출

정재진,황의성,주동현,김두영 동아대학교 정보기술연구소 2006 情報技術硏究所論文誌 Vol.14 No.1

This paper is the eye region which is used with confirmation element of face image it uses the SIFT and it extracting method proposes. The eye region image where becomes model and it composes the keypoint descriptor which is a SIFT result of the input image which it will extract. It uses the keypoint descriptor which and creates it composes a each feature vector, and the judgement where affine transform should have existed on after two feature points which adjusts with each other, against the feature point field which confront above half as the case eye region where the with each other same affine transform will exist it judged. There is not a test result learning process, more quickly recognition method of existing methods than the possibility of getting the result which extracts the region it was.