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정남수,최원,이호재,김한중,이정재,김종옥,Jung , Nam-Su,Choi, Won,Lee, Ho-Jae,Kim , Han-Joong,Lee , Jeong-Jae,Kim, Jong-Ok 한국농공학회 2004 한국농공학회논문집 Vol.46 No.5
Methodologies of the finite element and boundary element are combined to achieve an efficient and accurate analysis model of frame structure containing shear wall. This model analyzes the frame by employing the finite element method and the shear wall by boundary element method. This study is applicable to a specific situation, where the boundary element is surrounded by finite elements. By employing FE dominant method in which boundary stiffness matrix is transformed into finite element stiffness matrix, boundary element and finite element method are combined to analyze frame structure with walls.
DCB 접착이음에 대한 응력세기계수의 해석 및 파괴인성의 평가
정남용,이명대,강삼근,Jeong, Nam-Yong,Lee, Myeong-Dae,Gang, Sam-Geun 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.6
In this paper, an evaluation method of fracture toughness to apply interfacial fracture mechanics was investigated in adhesively bonded double-cantilever beam (DCB) joints. Four types of adhesively bonded DCB joints with an interface crack were prepared for analyses of the stress intensity factors using boundary element method(BEM) and the fracture toughness test. From the results of BEM analysis and fracture toughness experiments, it is found that the stress intensity factor, K1 is a parameter driving the fracture of adhesively bonded joints. Also, the evaluation method of fracture toughness by separated stress intensity factors of mixed mode cracks was proposed and the influences of mode components for its fracture toughness are investigated in adhesively bonded DCB joints.
에너지 방출률에 의한 접착이음의 계면균열에 대한 파괴인성의 평가
정남용,이명대,강삼근,Jeong, Nam-Yong,Lee, Myeong-Dae,Gang, Sam-Geun 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.9
In this paper, the evaluation method of interfacial fracture toughness to apply the fracture toughness was investigated in adhesively bonded joints of AI/Ced./A1. Four types of adhesively bonded double-cantilever beam(DCB) joints with the interface crack were prepared for the test of interfacial fracture toughness. The experiments to measure the interfacial fracture toughness were performed under the various mixed-mode conditions. The critical energy release rate, Gc, was obtained by the experimental measurement of compliances. From the experimental results, the interfacial fracture toughness for the mixed-mode specimens is well characterized by the energy release rate, and the method of strength evaluation by the interfacial fracture toughness was discussed in adhesively bonded joints.
정남수 ( Nam Su Jung ),이지민 ( Ji Min Lee ),이정재 ( Jeong Jae Lee ) 한국농촌계획학회 2004 농촌계획 Vol.10 No.2
According to the growing concerns of the public with efficiency and effects of regional policies, their assessment works have become an important issue. Up to now, several studies have been carried out on economic effects of policies using conventional cost/benefit analysis, while there have been few studies on assessment of amenity oriented policies. From the above consideration, this study tried to develop An Annual Expenditure Assessment Model (AEAM) for amenity-oriented policy-making in rural area. As a pre-work for model development, the hierarchical indices system for rural development and the classification system of expenditure were designed. Being based on high significant relationship between rural amenities and local government expenditure, a linear optimization model for maximization of regional amenity was constructed. Through a case study of Sunchang-gun, Chonbuk-province, the model applicability was ascertained.
정남수,이정재,Jung, Nam-Su,Lee, Jeong-Jae 한국농공학회 2006 한국농공학회논문집 Vol.48 No.1
In the evaluation of rural amenities, its properties are related with social, cultural, and environmental elements. In this study, Information Measure Model (IMM) and Cultural Property Priority Assessment Model (CPPAM) were developed adapting information measure model with text based surveying data. To apply developed model not only general properties but also specific surveyed data, Specific Information Gathering and Utilizing System (SIGUS) was constructed using the data in Dusan World encyclopedia. IMM shows priorities of cultural property by information in national-designated cultural properties. And CPPAM applied in surveying data in 2004 by Rural Resources Development Institute.
노령화사회에 대비한 농촌지역 장수도의 정의 및 장수지역 기준마련에 관한 연구
정남수 ( Jeong Nam Su ),이정재 ( Lee Jeong Jae ),김한중 ( Kim Han Jung ),이지민 ( Lee Ji Min ),서교 ( Seo Gyo ),이호재 ( Lee Ho Jae ) 한국농촌계획학회 2003 농촌계획 Vol.9 No.3
In this study, the longevity index was suggested for researches about social and environmental effects to human immorality and criteria for defining longevity area were developed using statistical analysis. Candidates indexes based on researches about the trend of human death ratio were investigated. As a result statistical analysis ratio of population over 85 years old and over 65 years was selected as a longevity index. Statistical analysis on the longevity distribution at each district showed that `eup` and `myun` are appropriate spatial unit to study social and geographical characteristics of longevity. The spatial analysis using the ArcView^(TM) with the suggested index shows the time dependent variances of degree of immorality and spatial relationship between degree of immorality and human migration.
경량형강을 이용한 농촌주택의 최적 구조요소 선정에 관한 연구
정남수 ( Jeong Nam Soo ),이정재 ( Lee Jeong Jae ) 한국농공학회 1998 한국농공학회 학술대회초록집 Vol.1998 No.-
In this study, the optimum structural components of the rural house using the light gage cold-formed steel frame is proposed. The model for selecting the optimum structural components, determines the range of load by the region and size of house, calculates the weight of the component by structural design process and optimizes a kind of the component by sensitivity analysis of the component to the total weight.
농촌지역 실버타운의 수요예측을 위한 노인인구이동 모형의 개발
정남수,이정재,김한중,윤성수,Jung, Nam-Su,Lee , Jeong-Jae,Kim , Han-Joong,Yoon , Seong-Su 한국농공학회 2004 한국농공학회논문집 Vol.46 No.2
An areal elderly migration model (AEMM) was developed to assess the demand of rural development projects targeted towards elderly people. The AEMM was developed with adaptation of the gravity model to represent spatial interaction regarding amenities. Areal characteristics were classified for estimating the amenities from the perspective of net migration. From 1990 to 2000, data were acquired from USCB, PASDA, PAHEALTH, PADCNR, PFBC, and NCDC in 67 Pennsylvania counties for analysis and application. The results revealed that elderly migration can be explained not only by areal characteristics but also by spatial interaction considering the population, distances, and amenities of surrounding areas.