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한상훈,변근주,김왕구 충북대학교 건설기술연구소 1982 建設技術論文集 Vol.1 No.1
The aim in this presentation is to explore the relationship between optimum design of structures and reliability of structures. In this paper, the concept of probability of failure is explained for a general structural system. The concept emphasized in the paper is the employment of probability of failure constraint in the mathematical programming problem to determine the set of design parameters which minimizes she weight of the truss structures. Specific reliability based optima for multi-member systems are shown for weakest-link structures which fail if any element fails. Several examples of optimization with failure probability constraints are presented, and then the sensitivity of optimum design to reliability level as well as parameters in the reliability analysis is discussed. The results presented indicate: 1) The results indicate the feasibility of using probability of failure constraints in solving for optimum m lti-member structural designs. 2) An important factor influencing the magnitude of the optimum design as well as its member sizes will be the choice of load and strength frequency distributions and their parameters particulary the coefficients of variation. 3) The optimum value increases with both allowable failure probability and increase in coefficients of variation. 4) The classical approach to optimum design using a safety factor to represent conservation often results in unnecessary weight and cost.
韓相勳,金永銓,조성석 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.1
Electronic conduction in various polymeric insulating material was investigated. Specially photo-current was observed in low density and 30 μ thick polyethylene when the sample was exposed by low-intensity white light from a tungsten lamp. A large photo-current was observed for the pre-irradiated sample by high dosage γ-ray. Photo-current was measured for many factors, wave length, voltage, temperature. Photo-current is fairly sensitive to photons with a certin range of energy (about 0.83eV), which might support that charge carriers are optically released from trap centers, it has approximately the same activation energy as the dark current. A tentative energy diagram for irradiated polyethylene is proposed on the assumption of band model. It includes two kinds of shallow trap and deep trap which are considered to play an important role in electrical conduction of polymeric insulator.
한상훈 경주대학교 2002 論文集 Vol.15 No.-
District level planning is a new planning system in Korea introduced in accordance with the amendment of City Planning Law last year. District level planning is differ from traditional city planning system in many ways. One of the differences is that district level planning is practice oriented rather than administration oriented as the traditional planning systems do. The district level planning synthesizes major functions of the 'urban design' previously controlled by the Architecture Law and 'Bebauungs planung' previously controlled by the City Planning Law in order to implement three dimensional control of the planning area. In addition, district planning has very flexible implementation principles comparing to the traditional planning systems in terms of the establishment of planning area, application of the limit of floor area ratio, building height, and etc. For these reasons, it is expected that the district level planning would have the most powerful influence over the real estate development in the future. Based on these findings, this study aims to present a basic theoretical research on the influences of district level planning over the development capacity of a given real estate located within the planning area. Results of this study show that in order to enhance real estate value through the accomodations of district level planning developers should have a clear understanding about the functions and characteristics of district level planning and have to pay great attention for the proposed uses of a real estate in advance to start construction to accomodate new development environment. Finally, results of this study emphasizes the importance of the thorough understanding about the local ordnance as to the district level planning for developers or real estate investors.
Chlamydia psittaci strain fransis의 plasmid pCpA1과 C. psittaci strain 6BC의 plasmid의 염기서열 상동성 분석
한상훈,정규회,G. V. Stokes,윤병수 경기대학교 1999 論文集 Vol.43 No.2
In Chlamydia, there is not efficient transformation vector system. This defect makes hard to study of Chlamydia. As a first process for E. coli-to-chlamydia shuttle vector construction, we executed DNA sequencing analysis of Chlamydia psittaci 6BC plasmid whole origine and parts of ORFs. We compared them with already known Chlamydia psittaci francis pCpA1 whole origine and parts of ORFs sequences using Computer DNA sequence analysis program PCGENE and demonstrated that partially analyzed origins and ORFs on two plasmids matched perfectly each other.