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방위별 지면 조도를 고려한 누락 풍속자료의 자동복구에 대한 연구
조경호,허종철,김건훈 濟州大學校工科大學産業技術硏究所 1999 尖端技術硏究所論文集 Vol.10 No.1
There are frequent chances that the measuring of wind data fails due to unexpected several factors. In these situations, the lost data are to be recovered properly for the further wind data analysis. The conventional method of wind data recovery is the interpolation or extrapolation form the available wind data using a constant ground roughness factor. In this study, a new concept of the directional ground roughness factor is proposed to improve the reliability of the recovered wind data. The application of the proposed concept to the field data shows promising results so that the proposed method can be successfully used for the recovery of the lost wind data.
조건우,김희원,권석근,곽은호,문석형 대한방사선 방어학회 1985 방사선방어학회지 Vol.10 No.2
KSC-1 핵연료 수송용기에 대한 방사선차폐해석을 QAD-CG, ANISN-KA, DOT 3.5등의 전산코드와 DLC-23/CASK의 핵단면적 자료를 사용하여 수행하였다. 운반물인 사용후 핵연료집합체로부터 방출되는 중성자 및 감마선의 방사선원항은 ORIGEN-79전산코드를 이용하여 평가하였다. 방사선차폐해석 결과, 1개의 가압경수로 사용후 핵연료집합체를 운반할 수 있는 KSC-1핵연료 수송용기는 정상적인 수송조건에서 뿐만 아니라 가상적인 사고수송조건하에서도 관련 법령에서 정하는 기준을 만족하고 있어 방사선차폐해석의 관점에서 볼 때, 그 안전성이 입증된다. Radiation shield design for a shipping cask, KSC-1, was evaluated to verify that the cask can be used in the transportation of a spent fuel assembly discharged from KNU 5 & 6. Radiation source term of the spent fuel assembly was calculated with the computer program ORIGEN-79, QAD-CG, ANISN-KA and DOT 3.5 codes were used in the shielding calculations and the nuclear cross section data needed was extracted from the DLC-23/CASK library. It is concluded that KSC-1 shipping cask satisfies the requirements specified in the relevant regulations under normal conditions of transport and under accident conditions in transport.
Skin entrance dose for digital and film radiography in Korean dental schools
Cho, Eun-Sang,Choi, Kun-Ho,Kim, Min-Gyu,Lim, Hoi-Jeong,Yoon, Suk-Ja,,Kang, Byung-Cheol 대한구강악안면방사선학회 2005 Imaging Science in Dentistry Vol.35 No.4
Purpose : This study was aimed to compare skin entrance dose of digital radiography with that of film radiography and to show the dose reduction achievement with digital systems at 11 dental schools in Korea. Materials and Methods : Forty six intraoral radiographic systems in 11 dental schools were included in this study. Digital sensors were used in 33 systems and film was used in 13 systems. Researchers and the volunteer visited 11 dental schools in Korea. Researchers asked the radiologic technician (s) at each school to set the exposure parameters and aiming the x-ray tube for the periapical view of the mandibular molar of the volunteer. The skin entrance doses were measured at the same exposure parameters and distance by the technician for each system with a dosimeter (Multi-O-Meter : Unfors instruments, Billdal, Sweden). Results : The median dose was 491.2 μGy for digital radiography and 1,205.0 μGy for film radiography. The skin entrance dose digital radiography was significantly lower than that of film radiography (p<0.05). Conclusion : Fifty-nine percent skin entrance dose reduction with digital periapical radiography was achieved over the film radiography in Korean dental schools.
방위별 지면 조도를 고려한 누락 풍속자료의 자동복구에 대한 연구
조경호,허종철,김건훈 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.1
There are frequent chances that the measuring of wind data fails due to unexpected several factors. In these situations, the lost data are to be recovered properly for the further wind data analysis. The conventional method of wind data recovery is the interpolation or extrapolation from the available wind data using a constant ground roughness factor. In this study, a new concept of the directional ground roughness factor is proposed to improve the reliability of the recovered wind data. The application of the proposed concept to the field data shows promising results so that the proposed method can be successfully used for the recovery of the lost wind data.
최태석,이동범,천영호,이근배 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.4
Open-ended questionnaire was asked 135 girls senior high school fencing athletics. According to these collected and analyzed open-ended questionnaires, they give the following conclusions. Mostly, open-ended questionnaires showed girls senior high school fencing players practiced many images such as self-confidence, patience, tenacity, competition and a practice, and in an image frequency aspect, epee players showed more images than foil players. However, in image content, while epee players had a tendency of defense, foil players, in contrast, showed attack-oriented images. As our worldwide predominant fencing athletics train formally the deficient imagery discipline, it is very important to make the applicable program of imagery discipline.
계층화된 퍼지 인식도를 이용한 웹 사이트 디자인 시뮬레이션에 관한 연구
이건창,정남호,조형래 한국경영과학회 2001 韓國經營科學會誌 Vol.26 No.1
It is well known that the web design is composed of several factors which are interacting with each other. However, the current approach to web design has been focused on modifying specific factors without considering its impact on other factors. In this sense, we propose more holistic approach to the web design by using fuzzy cognitive map. For this purpose, we form an illustrative fuzzy cognitive map for the web design which is based on the literature, and analyze an impact of change in a specific factor on other factors. Especially, to improve the output analyzability, we suggest an advanced version of fuzzy congnitive map called stratified fuzzy cognitive map. After simulating the fuzzy cognitive map for web design, we could conclude that our approach is robust and effective compared to the traditional web design approach.
이건호,조봉운 牧園大學校 建築·都市硏究센터 1997 建築·都市環境硏究 Vol.5 No.-
This study was performed with more built-up area of Tae-jon than other areas. The purpose of this study is to find the change of the land use in that area. As the results of this study, the changing characteristics of land uses were confirmed through comparing analysis the land use inventories(1991, 1996). Furthermore, basing on the result of study, this paper suggested the policy direction of land uses