항공 통신, 항법, 식별장비 시험평가

김성우,김민수,이영식,이병화,오우섭,Kim, Sung Woo,Kim, Min Su,Lee, Young Sik,Lee, Byoung Hwa,Oh, Woo Seop 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.5

Airborne radio communications, navigation, and identification equipments are the basic equipment of airplane. Airborne radio communications, navigation, and identification equipments are characterized by user's many quantitative and qualitative requirements. These equipment look like simple test and evaluation, but they have many complex factors. This paper describe the test and evaluation of airborne radio communications, navigation, and identification equipments.

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.

19세기 초반 노상추(盧尙樞)의 백운동 별업(別業) 조성과 경영

김성우(Kim Sung-woo) 한국역사연구회 2010 역사와 현실 Vol.- No.78

The subject of this article is a historical figure, Roh Sang-chu (1746-1829). After ending his 28-year-long bureaucratic career as the associate commander at Gadeuk Naval Fort in 1813, he started a typical life of a rural yangban in his home town, Seonsan, Gyeongsang-do province for 17 years until his death in 1829. The most notable feature that involved the latter years of his life at hometown was the creation of the Baeg'un-dong manor ("byeol'eop"). He started creating the manor in 1814 and dedicated himself to developing it as a mean for economic development and social stability of the village, until his death there after a long illness. It is the locale of Baeg'un-dong that this research pays the greatest attention to. It was a border village under the jurisdiction of Dogae-myeon, Seonsan prefecture in the Joseon dynasty. As a border village, it was much closer to Bian prefecture than to Seonsan. For this reason, Baeg'un-dong now belongs to Uiseong County. The fact that it was alienated from the Seonsan prefecture, in spite of its belonging to the prefecture, is the most crucial factor which determined the historical-geographical character of the village. It was for this reason that Roh Sang-chu made efforts to build a shelter for illegitimate descendants there. He had an illegitimate son, Roh Seung-yeop(1796-1842). Roh Seung-yeop and his descendants led a socio-economically stable life under the guardianship of Roh Sang-chu, who acted as a patriarch of the manor. But their stable life began to derail after the death of Roh Sang-chu, due to their disadvantageous social status as 'illegitimates.' In the course of the downfall, the second and third generation of descendants of Roh Seung-yeop had to earn their lives as hired hands or loggers, leading a hard life in a small, secluded area inside Hwa'rim, village for the legitimate descendants of Roh's lineage. It testifies to the fact that the illegitimates were given little opportunities for their social activities during Joseon dynasty. Given this social background of Joseon dynasty, Roh Sang-chu s experimentation to create a manor for the illegitimate descendants had to end with incomplete success.

한국형 공격헬기 임무탑재장비 구조도 개념 연구

김성우,김명진,오우섭,이종훈,임종봉,Kim, Sung-Woo,Kim, Myung-Chin,Oh, Woo-Seop,Lee, Jong-Hoon,Yim, Jong-Bong 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.4

The importance of avionics systems has increased to a significant level in modern aircraft development. Modern avionics system is a complex integrated system of state-of-art hardware and software technology. Specifying the avionics system architecture is the most important task throughout the avionics system design process. This paper reviews modern avionics system architectures and proposes an effective avionics architecture suitable for modern attack helicopters.

입자(粒子)와 장(場) : 동서양 건축에서의 단위개념

김성우,Kim, Sung-Woo 한국건축역사학회 2005 건축역사연구 Vol.14 No.1

All architecture in the history were based on a certain concept of architectural unit that functioned as a base model of architectural design. As we know, such model was not the same in the East and the West, and therefore, their architectures are not the same. This paper aims to identify how and why such base model of the two cultural area are different. As one way of discussing this issue, the concept of particle and field, as two representative idea of the West and East respectively, the employed. This kind of discussion can not follow the way of scientific verification as method of argument. However, the understanding of such concept of unit model is crucial for the understanding of the architecture of the culture in general. In basic sense, the tradition of Western architecture is rooted in the model of particle, where, architecture is conceived to be as a independent unit standing on earth as if it is a box like object. While, the tradition of Eastern architecture is rooted in the model field, where, architecture is conceived to be a part of field organization. In present days, we are used to the model of particle as if it is the only possible model of architecture. But, in fact, what man need to achieve in their architecture and city, is the balance between the two models.

시각(視覺)과 감응(感應) : 동서양건축에서의 경험의 문제

김성우,Kim, Sung-Woo 한국건축역사학회 2004 건축역사연구 Vol.13 No.4

Perception of architectural experience is different in different culture. This paper aims to identify how the experience of architecture is understood to be different in Eastern and Western culture. The discussion is based on the idea that the Western architecture placed more emphasis on visual perception, while the Eastern, on mutual responsiveness between man and built environment. The fact that the Western culture is more visually oriented than other culture, and therefore visual aspect of architecture, too, is considered to be very important, is already widely agreed among scholars. But, then, what had been considered to be important in the architectural experience in the East? It is the degree and quality of mutual responsiveness between man and architectural environment. This fact influenced much on the making of architecture of course, and the same fact played the key role in making the Eastern architecture different from that of the West. We are so used to the way of architecture of the West, that the quality of responsiveness is unknown if not forgotten. However, it is not the quality that was useful only in traditional society of the East, but necessary in our modem period as well. The quality for responsiveness, therefore, should be rediscovered and restored as the prime value and quality of architecture in the future architecture.

한국형 기동헬기 임무탑재장비체계 설계 및 입증

김성우,이병화,유연운,이종훈,임종봉,Kim, Sung-Woo,Lee, Byoung-Hwa,Yu, Yeon-Woon,Lee, Jong-Hoon,Yim, Jong-Bong 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.3

Mission Equipment Package(MEP) system is a collection of avionic components that are integrated to perform the mission of the Korean Utility Helicopter(KUH). MEP system development is classified mission-critical embedded system but KUH MEP system developed including flight-critical data implementation. It is important to establish the good development and verification process for the successful system development. This paper describe the development and verification process in each phase for the KUH MEP system. MEP system design is verified through the qualification test, system failure test and compatibility test in System Integration Laboratory(SIL).

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.

통일신라시대(統一新羅時代) 불교건축(佛敎建築)의 변화(變化)

김성우,Kim, Sung-Woo 한국건축역사학회 1992 건축역사연구 Vol.1 No.2

The development of Buddhist architectures of the Unified Silla period have been generally understood to have paired pagoda instead of one which had been popular until before the unification. Besides the stylistic categorization of paired pagoda system, there had been no further investigation reported concerning whether there was any detailed process of change within the development of paired pagoda style. This paper aims to identify such change inside the development of paired pagoda style, which, externally, seems to be the same pattern of site design maintained throughout the period of Unified Silla that lasted for about three centuries. Since the temple sites of study are in the same pattern of layout, the method of investigation has to be such that can identify the subtle changes that, in external appearance, are not easily discernible. Hence, this research compared the dimensions of important measurement of five temple sites to be able to clarify the process of minor changes. Among many sites of Silla temples, only five were suitable for the research since detailed measurement were possible through field research or the report of excavation. They are the sites of Sachonwang-sa, Mangduk-sa, site of Kunsuri, and Bulguk-sa. Although the five sites have the same style of paired pagoda, it is clear that there were consistant flow of change. Even though the motivation of such change were not strong enough to change the site pattern itself, it resulted continuous minor changes such as the size and location of architectures. The size of image hall, for example, was growing larger and larger as time goes on, while, the size of Pagoda was getting smaller. In the same way, the size of middle gate became smaller while the size of lecture hall became larger, although the rate of change in these cases were not as severe as that of image hall and pagoda. At the same time, pagoda was coming closer to the middle gate leaving larger space in front of the image hall. Such aspect is even more meaningful considering the fact that the pagoda, from the 8th century in Japan and China, moved outside of the major precinct. The image hall, too, moved toward the middle gate slightly so that the space in front of the lecture hall became more spacious. Such changes, of course, were not accidental but they are the same continuous motivation of change that caused the changes before the period of unification. Enlargement of image hall and reduction of pagoda, for example, represent the changing relative importance of religious meaning. Hence, it is evident that one can not easily imterprete the development of one style only by categorizing it to be one same style. In the veiwpoint of the underlying motivation of change, the fact that one style persisted for a certain period of time, does not mean there had been no change, but means that it was the time of motivational accumulation, causing minor changes within the same style, to be able to create major change coming after.

중국동북지역 소수민족의 원시적 주거형식과 한국주거와의 관계 -혁철족(赫哲族), 악륜춘족(鄂倫春族), 악온극족(鄂溫克族), 달알이족(達斡爾族), 몽고족(蒙古族)을 중심으로-

김성우,Kim, Sung-Woo 한국건축역사학회 2005 건축역사연구 Vol.14 No.1

Historical study of Korean traditional houses have been carried, mainly, based on the geographical region of Korean peninsula. However, the case of primitive houses can not be researched according to the geographical and racial concept of modern nations. This study aims to examine the primitive houses of ethnic minorities of northeastern China, where the cultural and racial background have been deeply rooted in the history of Korea as well as Korean traditional houses. Through the field research and literary materials, the basic types of primitive houses of the five ethnic minorities could be identified. Among these types, those that have possible relationship with Korean houses, are cone shaped house, underground house, and elevated wooden house. Archeological evidences of underground houses were amply found in Korea already, but above ground evidences could not be found. However, It seems quite certain that the cone shaped houses and elevated wooden houses, too, existed in Korea as one of the earliest housing types, as can be examined in remaining examples in Korean peninsula. With no doubt, the primitive houses of Korea have strong connection with that of the ethnic minorities of northeastern China. This can be verified through the facts that the evidences of cone shaped houses, the similarities of the use of Inner space, the evidences of elevated wooden houses. Also, the combination of wooden floor and ondol, which is known to be one of the strongest characteristic of Korean traditional houses, could be originated from the combination of primitive summer house, the elevated wooden house, and the winter house, the underground house with ondol.