냉연 후 어닐링 처리된 극저탄소강의 기계적 성질에 미치는 열연조건의 영향

권오준,김교성,장래웅 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.3

A laboratory investigation was carried out to study the effect of hot rolling conditions on the mechanical properties of cold rolled and continuously annealed ultra-low carbon steels stabilized with Titanium. The drawability(r￣-values) of cold rolled and annealed steels was found to be very sensitive to the microstructure of hot bands. Higher r￣-values were observed when the grain structure of the hot bands were more uniform and finer. The as-hot rolled grain structure was fine and uniform when FT was higher than Ar₃. If FT was lower than Ar₃, the grain structure was pancaked or abnormally coarse when the amount of deformation was small. However, when the amount of deformation was sufficiently large and CT was relatively high, the grain structure was uniform and fine by the recrystallization of ferrite. This led to the development of a new hot rolling process where the reheating temperature was adjusted to a lower level so that strips were finish rolled in the ferrite region.

정보기술통합이론을 응용한 스마트폰 수용 고찰

권오준 한국경영정보학회 2010 한국경영정보학회 학술대회논문집 Vol.2010 No.1

본 연구는 정보기술통합이론(UTAUT)을 응용하여 스마트폰을 수용하는데 있어 행위의도에 영향을 미치는 요인들을 검증하였다. 실증연구를 위한 설문조사는 스마트폰 사용이 기대되는 잠재사용자인 기존 휴대폰 사용자들을 대상으로 352부의 유효 표본을 확보하여 분석하였다. 구조방정식 모형의 경로분석을 통한 가설검정 결과 7개의 가설 중 6개의 가설이 지지 되었다. 개인의 혁신성은 행위의도에, 노력에 대한 기대는 성과에 대한 기대와 행위의도에 각각 영향을 미치는 것으로 확인되었다. 사회적 영향은 성과에 대한 기대와 행위의도여 유의한 영향을 미치는 것으로 나타났다.

회원작품 - 인문 아카이브 양림(養林)

권오준,김병익,Kwon. Ohjun,Kim, Byungik 대한건축사협회 2023 建築士 Vol.650 No.-

경수로 사용후핵연료 수중 낙하 충돌 속도의 이론적 평가

권오준,박남규,이성기,김재익 한국방사성폐기물학회 2016 방사성폐기물학회지 Vol.14 No.2

저장조에 위치한 사용후핵연료는 가혹한 원자로 조건에 의해 구조적 건전성이 와해되므로 외력에 취약하다. 따라서 운반 및취급 중 사고 상황이 고려되어야 한다. 극단적인 경우, 핵연료 취급 중 사고로 인해 핵연료 저장조에서 핵연료집합체 낙하가 발생할 수 있다. 이러한 사고 상황 하에서 연료봉 파손 등을 평가하기 위해서 수조에 충돌할 때 발생하는 충돌력을 분석할 필요가 있다. 이는 핵연료가 수조 바닥에 충돌할 때의 속도를 입력으로 하여 평가될 수 있다. 연료봉이 핵연료 중량 및 부피의 대부분을 차지하고 있으므로, 연료봉 다발은 수중 항력을 예측하는데 중요한 역할을 한다고 볼 수 있다. 본 연구에서는3×3 의 짧은 연료봉 다발을 모델로 사용하여 수중에서 낙하할 때 받는 수력을 계산하였고, 이를 전산모사와의 비교를 통하여 검증하였다. 본 방법론을 사용후핵연료 건전성 평가에 적용할 수 있을 것으로 기대된다. The spent fuel stored in the pool is vulnerable to external impacts, since the severe reactor conditions degrade the structural integrity of the fuel. Therefore an accident during shipping and handling should be considered. In an extreme case, the fuel assembly drop can be happened accidentally during handling the nuclear fuel in the spent fuel pool. The rod failure during such drop accident can be evaluated by calculating the impact force acting on the fuel assembly at the bottom of the spent fuel pool. The impact force can be evaluated with the impact velocity at the bottom of the spent fuel pool. Since fuel rods occupies most of weight and volume of a nuclear fuel assembly, the information of the rods are important to estimate the hydraulic resistance force. In this study, the hydraulic force acting on the 3×3 short rod bundle model during the drop accident is calculated, and the result is verified by comparing the numerical simulations. The methodology suggested by this study is expected to be useful for evaluating the integrity of the spent fuel.

플런저 단면형상에 따른 수면파의 특성에 관한 실험적 연구

권오준,서대원,송창우,이승희 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11

본 연구는 플런저 타입 조파장치(Plunger-type wave maker) 설계를 위한 기본연구로서, 플런저의 쐐기(wedge)형 단면 형상의 변화가 생성된 수면파의 특성에 미치는 영향을 실험을 통해 조사하였다. 이를 위하여, 플런저의 몰수부피는 고정하고, 몰수부 꼭지점의 각도를 25, 35 그리고 45〫˚로 바꾸어가며 조파 실험을 수행하여, 각각의 조건에서 각도의 변화에 따른 생성된 파고의 크기와 변화량을 비교하였다. 그 결과 쐐기형 플런저의 몰수부 꼭지점 각도가 클 수록 형성된 수면파의 파고가 높아지며, 스토크스(stokes)파와 유사한 파도를 얻을 수 있었다.

소뇌 혈관아세포종 출혈에 의한 돌연사 부검 1예

이윤성,이숭덕,권오준 大韓法醫學會 1996 대한법의학회지 Vol.20 No.1

A rare case of fatal intratumoral hemorrhage in a cerebellar hemangioblastoma is described. A 320year-old soldier was presented with loss of consciousness of acute onset, followed by rapidly progressing coma. At autopsy it was shown that the brain was edematous and covered with basal subarachnoid hemorrhage, and well circumscribed cystic tumor was noted in cerebellum. The tumor involved the cerebellar vermis and the right hemisphere, protruding upward from the superior surface of the cerebellum. The cystic portion was filled with fresh blood clot. Histologic study confirmed the diagnosis of hemangioblastoma showing typical two components of large polygonal stromal cell and anastomosing capillary network.

대장선암 조직의 CEA에 관한 면역조직학적 고찰

권오준,신현호,서인수,손태중 慶北大學校 醫科大學 1991 慶北醫大誌 Vol.32 No.4

The autors immunohistochemically studied 63 cases of colorectal adenocarcinoma to evaluate clinical significance of histologic pattern of tissue CEA. Immunohistochemical stain of cancerous tissues was performed by ABC method, and then light and electron microscopy were carried out. On light microscopic studies, CEA was mainly distributed on apical and lateral surface of normal and cancer cells and weakly positive in the cytoplasm of cancer cells. On electron microscopic studies, CEA was strongly positive along the apical and lateral borders of cancer cells and weakly positive in the cytoplasm as a pattern of fine granules. The statistical studies revealed such a data that high preoperative serum CEA level was shown in cases of tumor necrosis. Also in groups of surrounding invasion, well differentiation, and distant metastasis of the cancer, preoperative serum CEA levels were significantly increased. Thus, the evaluatin of CEA serologically and immunocytochemically in cases of colorectal adenocarcinoma may significantly inform in diagnosis or postoperative treatment and follow-up.

조경계획.설계 기술용역의 수행실태에 관한 조사연구

권오준,심경구,김유일,고동완 한국조경학회 1994 韓國造景學會誌 Vol.21 No.4

This study is designed to analyze the trends of professional services in Landscape Architecture during the past 5 years(1987-1991) in Korea. The data were collected from 1,117 projects from 56 engineering and landscape architecture firms. The findings are summarized as follows: 1) The projects have been increased annually by 19 percent in numbers and by 47 percent in money terms. 2) The main sources of projects are local governments and corporations. However the private sector comprise 31 percent in projects number and 46 percent in money terms. 3) The public park and tourism site development comprise a half of the projects. Recently recreational forest, golf, amusement and large housing site development have increased very rapidly. 4) In terms of workscope they are devided by 'complex' project which include extensive engineering works and 'simple' project which contain mostly planting design. The former include receational project with average 5 or 6 months contract period, and the later include housing and building site design with 2 or 3 months period. 5) Two types of consulting firms are typical. One is comprehensive engineering firms with urban planning section and few landscape section. The other is specialized professional firms with urban planning or landscape architecture. 50 percent of the project was done by comhensive engineering firms and 60 percent was done by urban planning section. The implication of these findings are broad: Firstly, We have to meet the demands in private secter mostly in recreation and leisure related projects. Secondly, landscape architects and project managers need more professional skills and coordination ability to deal with 'complex' projects. Thirdly, to enhance the quality of professional services it is required to have enough work time and higher service fee through legal and institutional enforcements.

비균일촉매(Pd on support)가 개환중합된 Tetracyclododecene유도체의 수소화에 미치는 영향

권오준,김훈식,이현주 한국공업화학회 2011 한국공업화학회 연구논문 초록집 Vol.2011 No.-

기술수용모형과 기술 사용자수용의 통합이론을 이용한 공공부문 BSC시스템 수용에 관한 연구

권오준,오재인,서현식,최형섭,임교현,양한주 한국경영정보학회 2008 한국경영정보학회 학술대회논문집 Vol.2008 No.-