하부가열 수평유체층에서 자연대류 유동에 관한 수치해석

양종훈,이동원,김양훈,현명택,김신 濟州大學校 工科大學 産業技術硏究所 1998 尖端技術硏究所論文集 Vol.9 No.1

The natural convection driven by a thermal buoyancy force was investigated in a square cavity. The top and bottom walls are cold and hot, respectively, while the vertical boundaries are adiabatic. A control volume approach with a power-law scheme was used to formulate the finite difference equations. The results are presented isotherms, velocity vectors, Nusselt numbers and critical Rayleigh numbers for the ranges of Ra = 1750 ∼ 20000 and Pr = 0.05 ∼ 10.0. The critical Rayleigh number increases as Prandtl number decreases. There exists a clockwise unicell flow near critical Rayleigh number, while two cells appear for large Rayleigh number.

하부가열 수평유체층에서 자연대류 유동에 관한 수치해석

양종훈,이동원,김양훈,현명택,김신 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.1

The natural convection driven by a thermal buoyancy force was investigated in a square cavity. The top and bottom walls are cold and hot. respectively. while the vertical boundaries are adiabatic. A control volume approach with a power-law scheme was used to formulate the finite difference equations. The results are presented isotherms. velocity vectors, Nusselt numbers and critical Rayleigh numbers for the ranges of Ra = 1750~20000 and Pr = 0.05~10.0. The critical Rayleigh number increases as Prandtl number decreases. There exists a clockwise unicell flow near critical Rayleigh number, while two cells appear for large Rayleigh number.

창랑 성문준 시학의 형성배경과 형상화 양상 연구

양훈식(Yang, Hoon-shik) 숭실대학교 한국문학과예술연구소 2018 한국문학과 예술 Vol.26 No.-

이 논문은 『파산세고(坡山世稿)』에 나타난 조선중기 창랑(滄浪) 성문준(成文濬, 1559~1626)의 시문을 고찰하여 그의 시학의 형성배경과시의 형상화 양상을 규명하는 것을 목적으로 한 것이다. 성문준 시학의 배경은 크게 두 가지로 나타났다. 첫째, 효제충신의 성문가학과 은거지향, 그리고 당음(唐音)의 영향을 들 수 있다. 은거지향과 효제충신은 성문에서 성수침-성혼-성문준으로 이어지는 성문준 시학의 근간을 이루고 있다. 여기에 그의 시작품은 『고문진보』와 『당음』을 통해 익힌 것을 알 수 있었다. 둘째, 성리학적 사유가 그의 시 속에 드러남을 알 수 있었다. 특히 구양수(歐陽脩)의 독서법을 실천하는 독서인의 삶과 『논어』에서 체득한 공부가 바로 그 학문의 바탕이었다. 성문준 시의 형상화 양상은 역사적, 지역적, 자연물의 완상(玩賞)과 지향인물이 반영된 것과 격물치지의 구현으로서 자주(自註)를 시화적 기능이 제시된 것으로 구별되어 나타났다. 첫째, 역사유적과 지역의 자연물의 완상과 지향인물의 흥취가 반영되어 나타났다. 자연물은 주로 유적지와 파산지역을 배경으로 한 시가 주를 이루었다. 인물 지향은 도연명(陶淵明)과 방덕공(龐德公)이 시 속에 배치되어 드러났다. 이것은 인물들의 은거지향과 가학의 영향에 따라 안심입명(安心立命)이 반영된 결과였다. 둘째, 시화의 기능과 격물치지의 구현으로서의 자주를 시에 사용하였다. 이는 그의 사물인식이 자주를 통해 시대적 배경과 공간적 배경에 반영된 것이었다. 이상에서 성문준의 시학은 가학을 토대로 『고문진보』 와 『당음』의 영향을 받았고 여기에 구양수의 독서법과『논어』에서 체득한 공부가 그 바탕임을 알 수 있었다. 또한 그의 시의 형상화 양상은 역사유적과 자연물의 완상과 자주를 통해 시화적 기능이 드러났고 격물치지의 사물인식을 시에 형상화하여 도연명과 방덕공을 지향인물로 제시한 점이 밝혀졌다. 이로써 소론계 시맥의 단초를 제공한 점에서 이 논문의 의의가 있다고 할 수 있다. This study aims at clarifying the background of the Shihak(poetry) formation of Changrang Seong Mun-jun(1559~1626) and its embodiment by investigating “Pasansego,” one of his Shi(poems). Seong Mun-jun`s Shihak has two formational backgrounds; Firstly, the retirement-orientedness and Seongmun Gahak(succeeding to his ancestor’s studies) with filial piety and fraternal love in loyalty, and the influence of Dangeum(the traditional musical scale of Tang Dynasty). The retirement-orientedness, and filial piety and fraternal love in loyalty stem from Seong Su-chim to Seong Hon to Seong Mun-jun. It also turned out that Seong Mun-jun’s Shi was completed by the poems from Gomunjinbo(ancient China’s taxonomic anthology of poems and writings)and Dangeum. And Secondly, the thought of Seongrihak(or Neo-Confucian Criticism) is also reflected in his Shihak. His poetry, especially, is based on the practical life of his learning from Gu yang-su’s Dokseobeob(his method of reading) and the learning by experience from Noneo(The Analects). The formational patterns in Seong Mun-jun’s Shihak reveal the pleasant appreciation of historical and regional objects in nature and his own poetic role-model figures, and also attempt to embody the prologue imbued in his own explanation as an anecdotal and critical function for the poets and their works in an effort to embody Zhu Xi’s theory of Gyeongmulchiji(or Ge-Zu Zhi-Zhi; the investigation of things and the extension of knowledge). One of his poetical patterns unveils his pleasant appreciation of historical relics including natural objects in nature, and his own pleasure and taste on his poetic role-model figures. His poems on natural objects mainly deal with the relics and surroundings of Pasan district. He also tried to arrange two Chinese poets, Tao Yuanming and Bang Deok-gong in his poems as his poetic role-model figures. This means that his poetical patterns result from An-shim-ip-myeong(reaching to the perfect state of spiritual peace and enlightenment to fate) in accordance with retirement-orientedness and Gahak’s influence. The second pattern of his poems shows that he tried to use the prologue imbued in his own explanation not only as the anecdotal and critical function for poets and their poems but also as the embodiment of Gyeongmulchiji. These patterns expose that his recognition of things is totally reflected in the historical and spatial backgrounds through the prologue. This study concludes that Seong Mun-jun’s poetry was influenced by the poems in Gomunjinbo and Dangeum, and based on Gu yang-su’s Dokseobeob and the learning by experience from Noneo. Furthermore, the anecdotal and critical function through the pleasant appreciation for historical relics and things in nature, and his own explanatory prologue are surely inherent in the formational patterns of his poetry. Finally, it turned out that Seong Mun-jun presents Tao Yuanming and Bang Deok-gong as his poetic role-model figures by embodying in his poetical works the recognition of things based on Gyeongmulchiji. This study has a definite significance in terms of providing the beginning of the poetical heritage to Soron, one of the factional political parties during Joseon Dynasty.

양파, 마늘 및 고추 첨가가 성장중인 쥐의 화학적 조성과 에너지 대사에 미치는 영향

양양한,윤창훈 제주대학교 방사능이용연구소 2001 연구보고 Vol.15 No.-

Effects of Onion, Garlic and Red-pepper supplementation on chemical composition and energy metabolism in growing rats have been investigated. The 40 male rats of Sprague dawley were devided into five groups with 8 rats each, and then the carcass composition of group O has been determined. The four groups of Control, Onion, Garlic and Red-pepper were fed with energy level(45g·kg^-0.75·d^-1) for 20 days, respectively, and then the carcass composition of each groups was determined. The proteins of diets were 15.0%, respectively ,and the intake of crude protein of were 6.6g per metabolic body weight. The daily feed intakes of Control, Onion, Garlic and Red-pepper were 9.7g, 9.8g, 9.5g and 9.7g, and the daily weight gains were 4.1g, 4.3g, 4.1g and 4.2g, and feed conversions were 2.4, 2.3, 2.4 and 2.3, respectively. The moisture depositions of Control, Onion, Garlic and Red-pepper were 53.8g, 53.8g 53.2g and 53.2g, and the deposition of crude ash were 2.2g, 2.6g, 2.5g and 2.5g, and those of crude fat were 5.4g, 8.5g, 7.9g and 6.9g, and those of crude protein were 18.8g, 18.3g, 18.8g, respectively, for 20 days. The daily ME intake of the four groups per metabolic body weight were 764kJ, 762kJ, 755kJ and 761kJ, and energy depositions of crude fat were 50kJ, 78kJ, 70kJ and 63kJ, and those of crude protein were 104kJ, 101kJ, 99kJ and 103kJ, and the daily heat productions were 610kJ, 583kJ, 586kJ and 596kJ, respectively.

Incoherent Processing of ISAR data for Moving Targets' Detection

양훈기 광운대학교 신기술연구소 1997 신기술연구소논문집 Vol.26 No.-

본 논문은 SNR이 상당히 낮은 ISAR 데이터로 부터 인코히어런트한 처리를 거쳐 이동표적을 효과적으로 검출할 수 있는 방법을 제시한다. 제시된 방법은 위치와 시간의 함수인 ISAR데이터를 공간주파수 및 시간주파수 함수로 변환한 후 유한개의 시간주파수 함수에서의 공간주파수 함수를 인코히어런트하게 더해줌으로써 이동표적 성분을 검출한다. 주어진 ISAR 시스템 환경에서 수신신호의 공간주파수 평면에서의 대역폭을 제시하며, 인코히어런트하게 더하기 전에 요구되는 전처리과정을 설명한다. 사용되는 공간 주파수 신호가 많아 질수록 수신신호의 variance가 감소하여 표적성분이 검파되는 이유를 확률 통계적으로 설명하며, 마지막으로 수신주파수를 충분히 사용할때의 false alarm 및 miss 확률을 유도한다. An efficient incoherent method to detect moving targets’ signitures out of heavily corrupted ISAR data is presented. The proposed method, after converting a two-dimensional space-time received signal into a two-dimensional spatial frequency-temporal frequency domain, exploits a finite number of spatial frequency functions extracted from some specific temporal frequencies. Selected spatial frequency functions are incoherently added together such that the moving targets’ signitures are revealed out of clutter with lowered variance. The bandwidth of the targets’ signitures in the spatial frequency domain are determined and the pre-processing procedure required prior to incoherent addition is described. It is shown that from the probabilitic /statistic point of view, as the number of functions used for addition increases, the targets’ signitures should become more dominent. Finally, for a situation where a sufficient number of functions are added, a false-alarm and miss rates are derived.

製銑에 關한 二三의 考察

梁勳永 全北大學校 1957 論文集 Vol.1 No.-

기존 조직과 비교를 통한 가상조직의 특성에 관한 연구

양경훈,김정윤,유훈상 중앙대학교 산업경영연구소 1999 산업경영연구 Vol.8 No.1

요즘 사회에서 정보는 현대 경영 환경에서 가장 중요한 자원이 되었다. 컴퓨터를 사용하는 정보기술은 조직구조를 조직하부로부터 재조직하고 있다. 이러한 상황은 ″가상기업″이라는 새로운 개념을 만들어 내게 되었다. 본 논문의 목적은 정보화 사회에 기업의 경쟁력을 극대화할 것으로 예상되는 가상기업의 모델을 제시하고 그 특징을 조직론적 입장에서 연구하는데 있다. 가상기업의 모델 제시와 조직적 우수성을 입증하려는 이유는 가상기업의 도입으로 기업이 현재와 미래에 효과적이고 효율적으로 경영을 할 수 있는 조직을 구성하게 됨을 보이는 것이다. 제2장은 아직 초기 단계의 개념인 가상기업의 개념 정립을 하였다. 먼저 인터넷 자료와 문헌 연구를 통하여 가상기업에 대한 모델을 제시하였고 모델에서는 기존 연구들을 종합하여 가상기업의 정의를 내리고 정의를 중심으로 특징과 단점을 제시하였다. 제3장은 가상기업의 사례를 조사하여 분석하였다. 제조업체 2개사와 서비스업체 1개사를 조사하였다. 이를 통해 가상기업의 특징으로 제시한 부분을입증하였다. 제 4장에서는 가상기업이 이루는 조직이 기존의 조직보다 우수성을 가짐을 Galbraith가 제시한 조직을 설계하는 요소들을 현대적인 입장에서 다시 구성하여 이를 기준으로 Minzberg가 분류한 조직의 유형들과 비교하여 분석하였다. 제 5장은 결론으로 전체내용의 요약과 본 논문의 공헌과 약점 그리고 앞으로의 연구방향을 기술하였다. Nowadays, information is the most important resource in modern management environments. Information technology using computer reorganizes the organization structure from the bottom. This situation makes new concept ″Virtual Corporation″ . The purpose of this paper is to present the model of Virtual Corporation which will have competitive advantages in information society and account organizational efficiency and show how to build the Virtual Conporation In chapter two. We synthesize existing researches and present model of Virtual Corporation and characteristics. Also I present the risk of virtual corporation to show week points of Virtual Corporation. In chapter three analysis three Virtual Corporation cases and shows organizational effectiveness and efficiency of Virtual Corporation. The factors of organization design, given by Dr. Galbraith, are restructured by our point of view and compared with other organizational structures that are given by Dr. Minzberg. In chapter five, the conclusion is summarized. Also we present this research′s contributions, weak points and future study.

SAR 신호처리 알리고즘의 개발 및 구현

양훈기 光云大學校 1995 論文集 Vol.24 No.-

The far field radiation pattern of a radar resembles a spherical wave. The existing SAR inverse methods are based on approximations for the spherical radiation pattern of the radar, e. g., the Fresnel approximation(stripmap-mode SAR), or the planewave approximation (spotlight-mode SAR). These methods fail in the case of high resolution imaging of a large object area. In this paper, we present a SAR system model and an inversion method based on a spatial Fourier decomposition. It is shown that this spectral decomposition transforms nonlinear phase functions of the target's spatial domain and synthetic aperture domain into linear phase functions. The performances of the proposed method implemented using simulated data are compared with those of the abovementioned approximation based methods.

한국 철강공업의 발달사

양훈영 연세대학교 산업기술연구소 1990 논문집 Vol.22 No.2

This study is to systematize the historical development processes and technology of iron industry in korea and to maintain good records of the finding. Appropriate time periods were defined to reflect prevailing social situation and annals of major events are as follows : General review in chapter 1, Primitive iron making period(before 1917) in chapter 2, Modern iron making beginning period(1918∼1945) in chapter 3, Mini-mill iron industrial period(1945∼1972) in chapter 4, Iron industry developing period(1973∼1989) in chapter 5, and Conclusions in chapter 6.

자재소요계획용 유연정보시스템 개발사례에 관한 연구

유대훈,이양우,조성훈,고창성 경성대학교 생산기술연구소 1997 생산기술연구지 Vol.4 No.-

This study suggests a procedure for construction flexible information systems for material requirement planning(MRP) under the circumstances of small and medium enterprises. To this end, a methodology in algorithmic expression is presented, in which learning curve is applied for calculating the practical lead-time, and real-time calculation of inventory for parts is performed condering all possible situations occurred in manufacturing as well as procurement sites. Finally, a case study is carried out for a small and medium enterprise producing several type of valves for ships in order to demonstrate the procedure proposed.