전자기력에 의한 연주 Slab 내의 교반유동에 관한 수치적 연구

이재헌,이성우,신영길,김희창 대한금속재료학회(대한금속학회) 1990 대한금속·재료학회지 Vol.28 No.1

A Numerical study was performed for the two-dimensional turbulent stirring flow created by linear motor in a continuous casting system. A k-εturbulent model was applied to solve time-averaged turbulent momentum equations within the computation domain. Four different situations in a stirring system being consisted of two-dimensional slab of 1 m(width) × 0.2 m(height) have been investigated, that is : Model (A) : W =0.1 m and B_0=0.01 tesla, Model (B) : W =0.3 m and B_0=0.01 tesla, Model (C) : W =0.1 m and B_0=0.02 tesla, Model (D) : W =0.3 m and B_0=0.02 tesla, where W is the length of linear motor and B_0 is the magnetic flux applied on the motor-side-surface of the slab. The results shows that the flow characteristics depends mainly on the magnetude of B_0 not on W. The order of the magnitudes of turbulent intensity at four flow situations were almost same. However, the magnitude of turbulent viscosity became much less in case of greater B_0 than in smaller B_0. Therefore it is recommended that the stirrer with greater B_0 should be used to make finer stirring action.

韓國敎育建築 空間構成因子의 二元的 相補性에 關한 硏究

李在憲,都龍昊 청주대학교 산업과학연구소 1989 産業科學硏究 Vol.7 No.-

The purpose of this study is to find the dual mutuality in the space composition factor of Korean educational architecture. Accordingly, the progression of this study find that the environmental factor and ideal element exerted influence upon the space composition of Korean educational architecture arrangement through the literaturs and survey investigation. As the result of the synthetic analysis of literature and survey materials, we can get conclusion as following as ; 1) The arrangements and the space compositions of Koren educational architecture are composed of the correlative function of the geographical position, natural features and the buildings. 2) The civic environment of chosun dynasty period gave to the dual ranks order on spatial situation. 3) Ideal factor(central of fengshui, duality of eumyang, ranks of confucian) operated on the valuable idealism factor of the space organization of educational architecture in natural orders.

忠淸地方 住居建築의 空間構成에 關 한 硏究 : 忠淸北道 上流住居를 中心으로 the house of upper class residents in Choong Cheong Buk Do

李在憲 淸州大學校 1981 論文集 Vol.14 No.2

This paper aims to clarify the characteristics of space composition of dwelling architeture in choong cheong province and there of to find out a traditional principle of the Korean housing architecture. In order to carry out the study, the following .steps were taken. ⅰ) To investigate the influences of natural and cultural elements upon the housing architecture in choong cheong area ⅱ) To analyze the relevant data abtained from field survey on the area of a Goons of Choong cheong Buk Do ⅲ) Based on the above results, to present the principal characteristics and inter-relation among the plan, layout, stucture, design element, space composition and so on.

결점수 자료에 대한 관리도의 비교

이재헌,김현종 중앙대학교 통계연구소 1996 統計論文集 Vol.- No.3

연속적인 생산공정에서 제품의 품질의 변화를 신속하게 탐지하여 품질이 일정수준을 유지하도록 하는 통계적 절차로서 관리도가 있다. 관리도는 관리하고자 하는 제품의 특성치에 따라 계수형 관리도와 계량형 관리도로 분류된다. 본 논문에서는 결점수 자료에대해, 계량형 자료에 대해 주로 사용되었던 CUSUM 관리도와 EWMA 관리도의 설계에 대해 알아보고, 전통적으로 사용되어 왔던 계수형 관리도인 c 관리도와 비교하여 그 효율성을 평가하고자 한다. 비교의 수단으로는 평균런의 길이(ARL)을 사용한다. CUSUM and EWMA control charts for variables are widely used in industry. This paper describes the design of CUSUM and EWMA charts for counted data, specially the number of defects. And comparisons with c chart, that is the traditional conteol chart for the number of defects, are given. Average run length(ARL) is adopted as a criterion for the comparison.

보리의 잡종강세에 대한 연구

정원복,이재헌 東亞大學校生命資源科學大學附設 農業資源硏究所 1998 農業生命資援硏究 Vol.7 No.1

6조맥 4품종, 2조맥 3품종으로 각각 이면 교잡하여 얻은 F₁잡종으로 각 형질에 대한 Heterosis와 Heterobeltiosis 의 정도를 산출한 결과는 다음과 같다. 6조맥에 있어서 각 형질별의 Heterosis는 간장· 절간직경·망장·지엽장·1000립중이 Ⅰ·Ⅱ집단에서 정의 강세를 보였고, 분얼수·지엽폭·1수립수는 Ⅰ·Ⅱ집단에서 부로 나타났다. Heterobeltiosis는 지엽장과 1000립중이 Ⅰ·Ⅱ집단에서 정의 강세를 보인 반면 간장·분얼수·절간직경·망장·지엽폭·1수립수는 Ⅰ·Ⅱ집단에서 부의 현상이었다. 6조맥의 교배조합에 있어서 2 × 3(Suwon #6 × Samdugjeonbug #45)조합은 Heterosis에서 간장이 11.73, 절간직경이 6.75, 망장이 88.27, 지엽장이 36.10, 1000립중이 23.45%로 정의 강세를 보였고, Heterobeltiosis에서 간장이 7.52, 절간직경이 3.25, 망장이 51.66, 지엽장이 29.95, 1000립중이 21.66%로 각각 정의 강세를 보였다. 2조맥에서 각 형질별의 Heterosis는 지엽장·지엽폭·1수립수·1000립중이 Ⅰ·Ⅱ집단에서 정의 강세를 보였고, 간장·분얼수·망장이 부로 표현되었다. Heterobeltiosis는 절간지경과 1수립수가 Ⅱ집단에서 정의 강세를, 간장·분얼수·망장·지엽장·지엽폭·1000립중이 Ⅰ·Ⅱ집단에서 부의 현상이었다. 2조맥의 교배조합에 있어서 2 × 3(Cygen × Plumage)조합은 Heterosis에서 1수립수가 24.27, 1000립중이 17.45%이고, Heterobeltiosis에서 1수립수가 4.74, 1000립중이 3.81%로 각각 정의 강세를 보였다. This study was conducted by reciprocal diallel crosses using four six-rowed barley and three two-rowed barley to observe the degrees of heterosis and heterobeltiosis from F₁hybrid. The results obtained were as follows. In the six-rowed barley positive heterosis was observed in culm length, culm diameter, awn length, length of flag leaf, and 1000 grain weight from population Ⅰ and Ⅱ, while negative heterosis was showed in tiller number, leaf width, and number of grains per spike from population Ⅰ and Ⅱ, Moreover, positive heterobeltiosis was found in length of flag leaf and 1000 grain weight from population Ⅰ and Ⅱ, but negative heterobeltiosis was showed in culm length, tiller number, culm diameter, awn length, leaf width, and number of grains per spike from population Ⅰ and Ⅱ. In the cross of six-rowed barley Suwon #6 × Samdugjeonbug #45 combination showed positive heterosis as 11.73 percent in culm length, 6.75 in culm diameter, 88.27 in awn length, 36.10 in length of flag leaf, and 23.45 in 1000 grain weight. Also, in the same combination positive heterobeltiosis was observed as 7.52 percent in culm length, 3.25 inculm diameter, 51.66 in awn length, 29.95 in length of flag leaf, and 21.66 in 1000 grain weight, In the two-rowed barley positive heterosis was showed in length of flag leaf, leaf width, number of grains per spike, and 1000 grain weight from population Ⅰ and Ⅱ, while negative heterosis was found in culm length, tiller number, and awn length. Moreover, positive heterobeltiosis was showed in culm diameter and number of grains per spike from population Ⅱ, but negative heterobeltiosis was showed in culm length, tiller number, awn length, length of flag leaf, leaf width, and 1000 grain weight from population Ⅰ and Ⅱ. In the cross of two-rowed barley, Cygne × Plumage combination showed positive heterosis as 24.27 percent in number of grains per spike and 17.45 in 1000 grain weight. Also, in the same combination positive heterobeltiosis was observed as 4.74 percent in number of grains per spike and 3081 in 1000 grain weight.

傳統住宅空間의 視知覺的 特性에 관한 硏究

이재헌,이정미 청주대학교 산업과학연구소 1996 産業科學硏究 Vol.14 No.-

This study focuses on the characteristics of visual perceptional in mutual space that is analyzed in position of resident. In this view, this study is intended to find the common and objective characteristics in Korean Traditional Architecture The objective of this study is to investigate the visual characters between interior space and exterior space on the traditional housing which is scatlered in Kyong-sang do, Cheon-ra do and Chung-cheng do.

淸州市 公共施設計劃에 關한 硏究

李在憲 청주대학교 산업과학연구소 1983 産業科學硏究 Vol.1 No.-

Cheongju city has occurred the disparity of growth and development because of insignificant bases for society and economy. So the city has not met the requirements that the citizens wanted for life environment and social welfare. There are two ways to be developed a region: balancing development for equitable growth and indispensable centralization development for efficiency. It is identical though a region takes any way to induce forces for the bases for growth. If the forces are strengthened and public services are increased, social and econemical conditiors are not only prepared to develop, but also accumulated for investment to public services and facilities. But, the public services and facilities of Chengju city are premodern and small-scale, and having to be made modern and expanded. Therefore, the location of the public services and facilities are planned with the consideration of neighbourhood, community and undeveloped area. Because the location shapes development in convenience for life and character for amenity, this study approached to lay stress on planning for educational, cultural, athletic and welfare facilities that was allocated by way of dividing into three basic units; civic centralized, basic needed and living environmental facilities.

韓國 傳統建築의 人間的 尺度構成에 대한 硏究

이재헌 청주대학교 산업과학연구소 2000 産業科學硏究 Vol.17 No.2

By made a comparative study about the restriction system of household affairs on the record of the period of the ancient three states and the record of the Yi-Dynasty whit 120 buildings of traditional architecture, I study about human on the space organization. From the result, the royal palace, temple and residence architecture were seen very contrast. Residence architecture is human-like and natural-like, and it has been succeeded to traditional characteristic of human measure organization by focused on the human behavior

淸州地域 아파트 配置計劃에 관한 硏究

이재헌 청주대학교 산업과학연구소 1998 産業科學硏究 Vol.15 No.3

This study is to analyze the diverse problem of site planning in a city apartment development a Yong-Am development, Ga-Gyung development. San-Nam development, Ha-Bock-Dea development etc that was built after 1990. It has passed deliberare on the condition of location by Chong Ju architecture deliberate committee. It is so analyze sit e planning, building-to-land rate capacity ratio, pitch of building, parking circulation, visual environment condition in a new development that is high-density dwelling region of Chong-Ju. According as analyses, study the application limit of the related laws and regulations and a primary factor of matter. It will be provided the directions for improvement that the data could apply to apartment site planning in future Cheong-Ju.

재생이론을 이용한 누적합관리도의 평균런의 길이 추정방법

김정일,이재헌 대전대학교 자연과학연구소 1992 自然科學 Vol.3 No.-

본 논문에서는 로그확률비통계량을 이용한 누적합관리도의 평균런의 길이를 추정하는 새로운 근사방법을 제시하고자 한다. 이 방법은 재생이론에서의 잔여대기시간에 대한 극한분포를 이용한 방법이다. 제시된 새로운 추정방법의 정확도를 비교하기 위하여 정규분포에서 기존의 추정방법을 비교하였다. A new approximation method is proposed for the ARL of CUSUM chart which is based on the log probability ratio statistic. This method uses the limiting distribution of the residual waiting time in the renewal theory. The values obtained by the proposed method are compared to some other approximation methods in normal case.