Alloy 600 노즐관통부의 이종금속용접 잔류응력에 따른 응력부식균열 거동 분석

김성우,김홍표,김동진,정재욱,장윤석,Kim, Sung-Woo,Kim, Hong-Pyo,Kim, Dong-Jin,Jeong, Jae-Uk,Chang, Yoon-Suk 한국압력기기공학회 2010 한국압력기기공학회 논문집 Vol.6 No.2

This work is concerned with the analysis of stress corrosion cracking(SCC) behavior of Alloy 600 nozzle penetration mock-up according to a residual stress induced by a dissimilar metal welding(DMW) in a nuclear reactor pressure vessel. The effects of the dimension and materials of the nozzle penetration on the deformation and the residual stress induced by DMW were investigated using a finite element analysis(FEA). The inner diameter(ID) change of the nozzle by DMW and its dependance on the design variables, calculated by FEA, were well consistent with those measured from the mock-up. Accelerated SCC tests were performed for three mock-ups with different wall thicknesses in a highly acidic solution to investigate mainly the effect of the residual stress on the SCC behavior of Alloy 600 nozzle. From a destructive examination of the mock-up after the tests, the SCC behavior of the nozzle was fairly related with the residual stress induced by DMW : axial cracks were found in the ID surface of the nozzle within the J-weld region where the highest tensile hoop stress was predicted by FEA, while circumferential cracks were observed beyond both J-weld root and toe where the highest tensile axial stress was expected.

동서양 건축에서의 '형태'의 의미 - '형상(形象)'과 '기형(氣形)'의 개념을 중심으로-

김성우,Kim, Sung-Woo 한국건축역사학회 2003 건축역사연구 Vol.12 No.4

This paper aims to identify the meaning of architectural form of the East and the West. Ordinarily, we know the visual differences of architectural form between the two cultural families, and the technical reasons of such differences. However, the East and the West have their own views of architectural form that are derived from their own views of architecture, and again the views of architecture are rooted in their own views of the world. The paper maintains a comparative stance between the two cultures in analyzing the different concepts of architectural form, and employ the ideas of 'Form(形象)' and 'Energy-Form(氣形)' as a kind of representative concept of the two views of architectural form. It is discussed that the idea of Form pursued the realization of ultimate substance which is less materialistic but more ideal., while, the idea of Energy-Form pursued the realization of oneness and health through mutual interaction between man, architecture and nature. Architectural form in the West has been the purposeful expression of human ideal, while in the East, it was an expediential device for better energy condition. It seems important to understand such differences of the meaning of architectural form between the East and the West, since, in present time, we tend to think that the Western conception of architectural form is the only possible one. But it is not generally known that the Western conception of form has very particular background reason of its own which is unique to Western culture, and on the other hand, the nature of East Asian conception of architectural form is generally unknown.

도농녹색교류-제6기 최고지도자과정 현장견학기

김성우,Kim, Seong-U 전국농업기술자협회 2005 농업기술회보 Vol.42 No.6

호남지방 전통주택에서의 규모와 평면형식 -전남 장흥군 관산읍 방촌만을을 중심으로-

김성우,이소연,Kim, Sung-Woo,Lee, So-Yeon 한국건축역사학회 1993 건축역사연구 Vol.2 No.2

The plan of Korean traditional houses are devided by the span-units which is the automatic result of the timber construction. This study aims to analyze the ways plan type change when the number of span changes. One village named Bangchon in Honan Province was selected where we investigated more than 30 houses ranging from 3 span to 6 span. It is identified that there were certain rules which govern the plan change when number of span change. When one span is added onto 3 span houses, wooden floor of one span is added in between the two ondol-rooms. When one span is added onto 4 span houses, kitchen is enlarged. When one span is added onto 5 span houses, wooden floor is enlarged into 2 span, Also the plan of Man's quarter(Sarang-chae) was investigated and compared to Lady's quarter. The research proves that such rules of plan change need to be considered as a basic standard of analysis when traditional houses are to be studied.

A Survey on the Health Status of Population with Disability in Goyang City

김성우,Gwang Bok Park,Hyoung Seop Kim,Jung Bin Shin,김종문,Myoung Sik Bae 대한재활의학회 2011 Annals of Rehabilitation Medicine Vol.35 No.1

Objective To improve the quality of life of the disabled population by decreasing the incidence of complications and chronic diseases and improving self-care abilities according to individual diseases through health status evaluation and basic survey. Method The basic clinical information of 1,378 regional severely-disabled patients were collected along with information regarding functional level, activities of daily living, nutritional status, and management of complications which were distinguished into 3 stages (good, moderate, poor), which were correlated into scores (1-3 points) that were used to assess a collaborative score (5-15 points) that represented their health status. Health behavior and blood tests were also done. Results Health status were evaluated based on sex, grade of disability, age, frequency of exercise and type of disability, which revealed that female sex, brain disorder, 1st grade disability, total lack of exercise, old age disabled patients were relatively poor in terms of health status. Conclusion Health status of the severely-disabled showed differences according to sex, age, grade of disability, type of disability, and frequency of exercise, and health programs designed to screen and follow up the severely-disabled person with poor health status as well as manage their accompanying diseases and complications are needed.

Measurement of Electron Beam Output for the Prototype Compact Linac

김성우,강상구,이동주,임희진,이만우,이준규,이무진,양광모,노태익,정동혁,Kim, Sung-Woo,Kang, Sang Koo,Rhee, Dong Joo,Lim, Heuijin,Lee, Manwoo,Yi, Jungyu,Lee, Mujin,Yang, Kwangmo,Ro, Tae Ik,Jeong, Dong Hyeok Korean Society of Medical Physics 2015 의학물리 Vol.26 No.1

The C-band compact linear accelerator (linac) is being developed at Dongnam Institute of radiological & Medical Sciences (DIRAMS) for medical and industrial applications. This paper was focused on the output measurement of the electron beam generated from the prototype electron linac. The dose rate was measured in unit of cGy/min per unit pulse frequency according to the IAEA TRS-398 protocol. Exradin-A10 Markus type plane parallel chamber used for the measurement was calibrated in terms of dose to water at the reference depth in water. The beam quality index ($R_{50}$) was determined by the radiochromic film with a solid water phantom approximately due to low energy electrons. As a result, the determined electron beam output was $17.0cGy/(min{\cdot}Hz$. The results were used to monitor the accelerator performance during the development procedure. 의료용 및 산업용으로 활용하기 위한 C-밴드형 콤팩트 선형가속기의 개발이 동남권원자력의학원에서 진행되고 있다. 본 논문에서는 선형가속기 시작품에서 발생한 전자빔의 출력 측정 결과를 보고하고자 한다. 출력 측정은 물흡수선량에 대해 교정된 Exradin-A10 마커스형 평행평판형 전리함을 사용하여 물속 기준 깊이에서 IAEA TRS-398 프로토콜에 따라 흡수선량율을 결정하는 과정으로 진행되었다. 전자선 에너지가 낮은 점으로 인하여 선질지표($R_{50}$)은 필름 측정법을 써서 근사적으로 결정하였다. 결과로서 단위 펄스 진동수당의 선형가속기 전자빔의 출력은 $17.0cGy/(min{\cdot}Hz$로 나타났다. 본 연구의 결과는 개발 중인 전자가속기의 성능 평가 자료로 활용될 것이다.

무인기 항공전자 체계의 아키텍처 개발 동향연구

김성우,심재익,이왕국,이우진,원대연,Kim, Sung Woo,Sim, Jae Ick,Lee, Wang Gug,Lee, Woo Jin,Won, Dae Yeon 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.4

The major elements of avionics system architecture are requirements, Real Time Operating System, message communication, memory, and data format etc. Herein describes a state-of-the-art development trend for the avionics system architecture, system requirements and data bus among the major elements of avionics system. While, domestic technology has been tried to Integrated Modular Avionics(IMA) system based on the Avionics Full Duplex Switched Ethernet(AFDX) technology during Light Attack Helicopter(LAH) project in Korea, but not yet proved as the product case in Full Scale Development Phase. The avionics system architecture considering the domestic inexperience of the IMA system architecture are suggested for the Next-generation Corps Unmanned Aircraft System.

기고 - 가금 정액의 활용방법과 동결 정액의 적용방법

김성우,Kim, Seong-U 대한양계협회 2015 월간 양계 Vol.47 No.8

기획특집(2) - 휴대폰 카메라 모듈 기술의 현주소

김성우,Kim, Seong-U 한국광학기기산업협회 2012 光學世界 Vol.138 No.-

꾸준하게 성장하던 휴대폰 시장이 2009년 글로벌 경제위기로 인하여 역성장을 기록하게 되었다. 경제위기에 따른 소비위축이 큰 원인일 수도 있지만 혁신적인 내용이 없는 휴대폰만 쏟아져 나왔다는 생각이 든다. 애플의 아이폰이나 구글의 안드로이드를 채용한 다양한 스마트폰의 등장은 혁명이었다. 다양한 어플리케이션은 여러 분야의 시스템을 바꾸게 했으며 사람들의 생활패턴을 바꾸기도 했다. 결국 스마트폰의 등장은 휴대폰 시장을 2009년에 비해서 2010년에 30% 이상 성장시키는 역할을 하였다. 이러한 성장세는 2012년까지 이어지고 있으며 휴대폰 연간 판매량은 단말기 대수 기준으로 약 20억개(스마트폰은 25~30% 수준), 휴대폰 누적 가입자 수는 약 60억명이 예상되고 있다. 휴대폰 시장의 약 40~50% 정도가 중국, 인도, 브라질 등 신흥시장이라고 보았을 때, 특히 스마트폰의 성장성은 더 크다고 할 수 있겠다.

회원작품 - 레이킨스몰

김성우,Kim, Sung-Woo 대한건축사협회 2011 建築士 Vol.2011 No.8