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이상현,이상준,문경일,조성의 한국IT서비스학회 2009 한국IT서비스학회지 Vol.8 No.4
Objectifying claims filed during the warranty period, analyzing the current circumstances and improving on the problem in question is an activity worth doing that could reduce the likelihood of claims to occur, cut down on the costs, and enhance the corporate image of the manufacturer. Existing analyses of claims are confronted with two problems. First, you can’t precisely assess the risks of claims involved by means of the value of claims per 100 products alone. Second, even in a normal state, the existing approach fails to capture the probabilistic conflicts that escape the upper control limit of claims, thus leading to wrong control activities. 1 이상현·이상준·문경일·조성의 To solve the first problem, this paper proposed that a time series detection concept where the claim rate is monitored based on the date when problems are processed and a hazard function for expression of the claim rate be utilized. For the second problem, this paper designed a model whereby to define a normal state by making use of PID (Proportion, Integral, Differential) and infer by way of a fuzzy concept. This paper confirmed the validity and applicability of the proposed approach by applying methods suggested in the actual past data of warranty claims of a large-scaled automotive firm, unlike hypothetical simulation data, in order to apply them directly in industrial job sites, as well as making theoretical suggestions for analysis of claims.
이상현,이준석 대한건축학회 2005 대한건축학회논문집 Vol.21 No.5
This study addresses the changes in the 20th architectural education of the United States, focusing on investigating the changes in the inter-relationship between the educational needs and the educational contents. The research results reveal that there have been a lot of changes in the educational needs and the contents; the changes can be categorized into three distinctive periods such as the period of using educational resource-oriented standards, performance-based standards, and integration-based standards. By doing this research, it will be possible to recognize a mechanism which effectively improve the educational system in such a way of meeting the needs from the architectural practice. Thus, although this research deals with the education of the United States, it would be employed for launching and improving the architectural accrediting system in Korea.
이상현,정명호,손일석,이상엽,홍서나,강동구,김계훈,박형욱,홍영준,김주한,김원,안영근,조정관,박종춘,강정채 대한심장학회 2005 Korean Circulation Journal Vol.35 No.11
Factor XI deficiency is a very rare congenital coagulation disorder. Bleeding complications should be consideredwhen treating a patient with unstable angina and congenital coagulation disorder during and after percutaneouscoronary intervention (PCI). Thrombotic complications can develop after fresh frozen plasma (FFP) transfusionand drug-eluting stent (DES) implantation. We report here on the successful management of a patient havingunstable angina with factor XI deficiency, and this patient was treated with PCI under intravascular guidance andwith the aid of FFP and hemostatic devices.
Deriving Site Index Curves for Chamaecyparis obtusa Stand Grown in Southern Regions of Korea
이상현 한국산림과학회 2004 한국산림과학회지 Vol.93 No.2
The objective of this study is to estimate site quality and derive site index curves for Chamaecyparis obtusa, which base age is 50 years, stands grown in southern regions. The function was developed by algebraic difference equation method and non-linear regression model used. The Gompertz polymorphic equation showed the highest precision of the fitting, it was, therefore, selected for stand height prediction. Polymorphic site index family curves, hence, were presented based on the Gompertz height prediction equation. The resulting site index curves could provide an indication of site quality and this information could be used for rational management of Chamaecyparis obtusa stands grown in southern regions of Korea.
Development of an E. coli Expression Cassette for the Efficient Production of a Harmful Protein
이상현,하종명,이재화,하배진,Hwan Jong Kwak,Ok Soo Kim 한국생물공학회 2004 Biotechnology and Bioprocess Engineering Vol.9 No.5
In order to produce a harmful protein more efficiently, this expression cassette, dubbed pCol-MICT, is directed by the colicin promoter, and was constructed by the insertion of a rrnBT1T2 fragment of pEXP7, and a MxeInteinCBD fragment of pTXB3, into pSH375. To test whether harmful proteins, including proteolytic enzymes, could be effectively produced by this cassette, the carboxypeptidase (CPase) Taq gene was inserted into the pCol-MICT cassette to yield pCol-CPaseTaq-MICT. E. coli W3110 cells harboring pCol-CPaseTaq-MICT produced a large quantity of this enzyme, as much as 47.2 mg of purified from per liter of culture, when cultured in the presence of mitomycin C (0.4 g/mL). This indicates that the colicin promoter-controlled E. coli expression cassette was able to produce almost 8 times of protein than the conventional tac promoter-based system, and that this cassette may be useful in the synthesis of other harmful proteins.