Effect of Ultrasonic and Air Blast Shot Peening on the Microstuctural Evolution and Mechanical Properties of SUS304

H. Yu,J.L. Dong,K. Shin,D.H. Yoo,J.S. Jung,S.J. Kim,J.H. Kim 한국표면공학회 2008 한국표면공학회 학술발표회 초록집 Vol.2008 No.-

가속화의 시간성에 관한 여성주의적 고찰

김혜련 가톨릭대학교 인간학연구소 2008 인간연구 Vol.0 No.15

유전 알고리즘을 이용한 노심내 출력분포 최적화

김휴찬,조경호,이윤준 濟州大學校 産業技術硏究所 1997 산업기술연구소논문집 Vol.8 No.1

A computer code named 'MGA_SCOUPE' has been developed to determine an optimal fuel-loading pattern for the nuclear reactor. The optimization goal in this code is (1) the minimization of the deviations in the power peaking factors both at BOC and EOC. and (2) t h e maximization of the average burnup ratio at EOC of the total fuel assemblies. The developed code automatically performs lots of searches for the globally optimum solution based upon the Modified Genetic Algorithm(MGA). Through the application of the MGA-SCOUPE to the KORI 4-4 cycle reactor model, we have obtained a new better fuel loading pattern compared with the ones obtained by the existing codes such as SCOUPE and ROCS. Among the several satisfactory results, two dominant improvements can be summarized as follows; - The avg. burnup ratio can be relatively increased by approx. 45%. and - The standard deviation of the power peaking factor of the reactor both at BOC and EOC can be relatively reduced by approx. 25.8% and 18.7% respectively. In addition to the technical improvements as above. the MGA-SCOUPE has removed the user-dependency problem occuring at the SCOUPE in the optimal loading pattern searches, and made the searching process fully automated.

Evaluation on the Computational Performance of the Bubble Visualization Program

김휴찬,조경호 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.2

In this study. the EIT (Electrical Impedance Tomography) technique is applied for the two-phase flow visualization. Using the conventional EIT image reconstruction algorithms, however. the processing time increases rapidly as we try to get a higher spatial resolution. In order to overcome this problem, we added an adaptive mesh grouping method to the conventional EIT reconstruction algorithm. Performance test on the proposed mesh grouping method shows promising results that we can significantly reduce the image reconstruction time without sacrificing the spatial resolution. The mesh grouping method is found to be very effective especially in bubble distribution measurements.

소성힌지를 이용한 화재 시의 철골 부재 해석

이혜경,홍성걸,강석원 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)

This paper is to analyze a steel member under fire based on the classical plastic hinge theory and to present an analysis method different from the FEM. With the temperature rising, the moment capacity is reduced and restraint forces additionally occur. If you know the reduction of the moment capacity with time and the sum of restraint moment and moment by load, you can find out the hinge-developing time by matching those two values. You can call that time the hinge-developing time or the collapse time. You could also find out where the hinges occur.

시판 참기름 및 참깨제품의 진위판별에 있어서의 지방산 및 Sesamol 성분의 이용

최효선,고영수 漢陽大學校 韓國生活科學硏究所 1995 韓國 生活 科學 硏究 Vol.- No.13

An attempt was made to use the fatty acid and sesamol composition as a basis for the identification of sesame oil and sesame products adulteration. In 23 kinds sesame oil and 7 kinds of sesame and sesame products pressed experimentally, the ratio of oleic to linoleic acid content (O/L ratio) were in the variable ranges of 0.71-0.98. Only 14 among 30 collected sesame oils and sesame products were found to be pure sesame oil by fatly acid and sesamol content value determination. In 16 adulterated sesame oils, it was revealed 5 samples were adulted soybean oil, 4 with rice bran oil, 4 with corn and perilla seed oil and 3 with rape seed oil.

생태주의 이론과 CEMP 모형에 바탕을 둔 다문화교실의 교수방법

박휴용,노석준 한국교육방법학회 2012 교육방법연구 Vol.24 No.2

본 연구는 다문화교실을 위한 교수학습의 원리와 그 방법론에 관한 하나의 시론으로써, 다문화교실의 성격을 논의하고, 생태주의 관점에서 다문화 교실환경을 이해함으로써 다문화교실의 핵심적 교수학습 원리로 ‘협력-배태-매개-참여’(CEMP) 모형을 제시하고자 한다. 아울러 이러한 CEMP 모형을 바탕으로 한 구체적인 교수학습 방법론으로써 교사와 학생들의 역동적인 상호작용을 독려하는 상호작용적 피드백의 방법론을 제시하고자 한다. 이를 위하여 본고는 다문화교실의 성공을 위한 요인으로 문화적 다양성에 대한 인식과 참조의 필요성, 학습기회의 형평성을 보장하는 것, 그리고 교사의 태도와 대응전략에 있어서의 근본적인 변화가 필요함을 강조하였다. 또한 다문화교실의 교수방법론으로써 기존의 개별화 교수법과 문화감응 교수법이 생태주의적 관점에서 어떤 관련성이 있는지를 논의하였고, 하나의 실천적인 방법론으로써 주류문화 학생들과 다문화 학생들의 교수형평성을 고려한 ‘상호작용적 피드백’법을 교수방법론으로 제시하고 있다. 마지막으로, 본 논문이 강조하는 다문화교실에 대한 생태주의적 이해가 교수학습이론과 실천에 주는 시사점을 논의하였다. This study initiates a discussion on the principles and methodologies for implementing successful multicultural classrooms. In doing so, this paper discusses three major characteristics of multicultural classroom, and proposes ecological perspectives to understand the idiosyncratic context and environments of multicultural classroom. Then, this paper suggests a participation model which consists of mediation, collaboration, participation, and embeddedness as four constructing principles. Finally, this paper provides three methodological approaches of practicing an effective instruction for multicultural classrooms; Differentiated Instruction, Culturally Responsive Pedagogy, and Interactional Feedback Approach for securing instructional counterbalance. The significance of the Participation Model for multicultural classrooms lies in the following three points. First, the leadership for learning belongs to students, rather than teachers; second, the interaction between students becomes maximized and contextualized learning of meaning is emphasized; and third, students will perceive that learning is the result of continuous experience, through which they can participate in and cooperate with the communities of inquiry. Discussions on these three methodologies are followed.

지리정보데이터 획득을 위한 전문가시스템 구축 : 항공사진판독의 경우 in case of aerial photo interpretation

이규목 慶北大學校 社會科學大學 地理學科 1996 地理學論究 Vol.- No.16

Remote sensing and aerial photo interpretation is the science and art of obtaining information about an object, area, or phenomenon through the analysis of data acquired by device that is not in contact with the object, raea or phenomenon under investigation. But only an expert of aerial photo interpretation can interpretate the photo they want. So Building a expert system can avoid this kind of difficulty. In this paper, I introduce an expert system assisting aerial photo interpretation. This system can apply to region and urban planning, ebnviroment part in a future. I try to drop testing this system for future study.

핵연료 최적 장전모형 탐색을 위한 GA-SA 혼합형 프로그램에 관한 연구

김휴찬,조경호 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.2

In this study. several searching algorithms such as the SA(simulated annealing). GA(genetic algorithm) and their variance have been reviewed and implemented in C programming language for the searching modules for the optimal fuel loading pattern. These modules have been interfaced with three simple core calculation codes written in Fortran programming language and tested for their performance. As a result, a hybrid searching algorithm based upon the GA and SA has been developed to supplement each algorithm's drawbacks. This hybrid one has shown the best performance among the tested ones. In this hybrid search engine. a new cooling schedule, i.e. the cooling schedule with reheating stages has been also devised to improve the usual simple banner cooling schedule' of the SA.

유전 알고리즘을 이용한 노심내 출력분포 최적화

김휴찬,이윤준,조경호 濟州大學校工科大學産業技術硏究所 1997 尖端技術硏究所論文集 Vol.8 No.1

A computer code named 'MGA_SCOUPE' has been developed to determine an optimal fuel-loading pattern for the nuclear reactor. The optimization goal in this code is (1) the minimization of the deviations in the power peaking factors both at BOC and EOC, and (2) the maximization of the average burnup ratio at EOC of the total fuel assemblies. The developed code automatically performs lots of searches for the globally optimum solution based upon the Modified Genetic Algorithm(MGA). Through the application of the MGA_SCOUPE to the KORI 4-4 cycle reactor model, we have obtained a new better fuel loading pattern compared with the ones obtained by the existing codes such as SCOUPE and ROCS. Among the several satisfactory results, two dominant improvements can be summarized as follows; - The avg. burnup ratio can be relatively increased by approx. 45%, and - The standard deviation of the power peaking factor of the reactor both at BOC and EOC can be relatively reduced by approx. 25.8% and 18.7% respectively. In addition to the technical improvements as above, the MGA_SCOUPE has removed the user-dependency problem occuring at the SCOUPE in the optimal loading pattern searches, and made the searching process fully automated.