• 무역상무연구
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• 제61권
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• pp.249-272
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• 2014

The purpose of this study is to seek the revitalization plans of export platform for supporting export enterprise of the domestic public services. To activate the export platform, alternatives to two aspects are required as follows. First of all, a governance plan of export platform should be established. At present, an operation entity of export platform, which is still developing stage, is not yet established. In this situation, even though export platform developed, it will faced with inefficient operation. Therefore, an operation entity and appropriate business model are important to the platform activation. second, to activate platform, it is necessary to support export process of life cycle. In particular, the service, which can support the business strategies setting and project implementation stage, is required. In addition, in order to activate the export platform is need to operate with he government's support program.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2005년도 춘계학술대회 논문집
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• pp.427-433
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• 2005

Railway wheelset is the most essential part which undergoes severe cyclic loadings. In recent years, there has been increasing need for insuring the safety of running as the speed of the railway vehicles is getting higher. So it is required on the assessment of fatigue characteristics of the wheelset to consider plastic deformation which might be probable in the severe loading condition. In this study, total-strain controlled low cycle fatigue(LCF) test were performed to observe the LCF behaviors of the railway wheels and axles using companion specimens method. From the experimental results, the cyclic mechanical properties have been evaluated and total strain amplitude versus life relationship have been derived using the empirical Coffin-Manson law.

• 디지털융복합연구
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• 제10권8호
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• pp.149-157
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• 2012

개인정보보호법이 새로 제정이 되어 기업 및 기관에서 이에 대한 준비와 대책 마련이 활발히 전개되고 있다. 개인정보를 취급하는 정보시스템에 대하여 개인정보 침해의 위협을 사전에 예방 및 점검을 수행하는 개인정보영향평가를 K병원의 분석 사례를 통해 연구하였다. 결론적으로 K병원의 개인정보 영향평가 분석을 수행한 결과 평가영역별로는 대상기관관리체계는 79.0, 대상시스템의 보호수준은 97.9, 개인정보처리단계의 결과는 67.4이고 CCTV는 90.0으로 나타났다. 개인정보보호수준이 가장 낮은 항목은 개인정보생명주기관리 항목의 저장 및 보유단계 50.0, 이용 및 제공 64.1 및 파기 단계 66.7로 나타났다. 위험도 분석결과 고위험도 항목은 개인정보처리구역 항목 11.0과 개인정보생명주기 영역의 저장 및 보유단계 항목이12.5, 파기단계 항목이 13.0으로 높은 수치가 나왔다. 종합적으로 보면 고위험도이면서 저보호수준인 항목은 저장 및 보유단계와 파기단계로 파악이 되었다.

• 한국도서관정보학회지
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• 제45권4호
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• pp.365-390
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• 2014

본 연구는 법령의 제정에서 개정, 폐지에 이르기까지의 라이프사이클과 폐지 이후의 변천에 대한 유형을 분석하여 법령에 대한 FRBR 모형의 적용 방안을 검토하였다. 법령은 법조문으로 구성되어 있는 통합개체(aggregate entities)로서의 저작이며, 각각의 법조문도 저작이다. 이들의 사이에는 전체-부분 관계가 있다. 법령은 관보에 공포됨으로서 효력을 가지며, 업데이트된 법령이나 번역 자료 등은 법적으로 유효하지 않다. 법령명이 변경되었다고 하더라도 폐지되지 않으면 동일 개체로 취급하였으며, 관보에 표현된 단순한 정정문도 법적으로 유효하다. 도서관법은 도서관법(圖書館法), 도서관진흥법(圖書館振興法), 도서관(圖書館) 및 독서진흥법(讀書振興法), 도서관법의 순서대로 대체되었으며, 하나의 슈퍼저작으로 묶을 수 있다. 이것들에 대해 FRBR 모형 적용 방안을 제시하고, 도서관법에 대해 FRBR 모형의 제1집단인 저작, 표현형, 구현형, 개별자료에 대한 실제의 적용 사례를 제시하였다.

• 환경영향평가
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• 제14권2호
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• pp.83-96
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• 2005

Brominated flame retardants have the market share of 40%, comparing others because of their low cost and highly effective retardation against the flame. However, their toxic effects in human and properties of the accumulation in the environments have been issued among the international organization such as EU, OECD and etc. It, therefore, was surveyed the classification, toxic effects, and the usage of Brominated flame retardants, the trends for their managements in the world and Korea, and their contaminated levels in Korean Peninsula. In addition, the management directions for them were proposed. Penta, octa, and deca-BDE among brominated retardants will seem to be prohibited by the regulation as a flame retardants for plastics in Europe because of their toxic effects. Although Penta and Octa BDEs was used marginally in Korea, deca-BDE was 27% of brominated flame retardants (49,050 ton) which had been used in 2002. However, risk assessment for brominated retardants might not launched in Korea, yet. These reports demonstrate that toxic brominated retardants such as PBDEs will be assessed for their usage and the level of contamination in the environment in the area of the point sources like the industrial areas, incinerators and etc. However, the law to regulate the hazardous chemicals seems not to be dictated the monitoring of their contamination in the environment. We, therefore, suggest how to evaluate and to monitor the toxic contaminants with EIA (Environmental Impact Assessment) and LCA (Life Cycle Assessment) system. Further, to establish the management system of BFRs (such as the monitering of contamination levels in environments, life cycle assessment, and risk assessment for the toxic chemicals), It can be recommended the law to deal with the method analyzing chemicals will be established, which contains QA/QC (Quality Assurance and Quality Control) to evaluate the analytic capability of the companies to prepare EIS (Environment Impact Statement) or other institutes for analyzing chemicals.

• 한국안전학회지
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• 제30권3호
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• pp.13-19
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• 2015

Railway vehicle equipment goes back again to the state just before when failure by the repair. In repairable system, we are interested in the failure interval. As such, a statistical model of the point process, NHPP power law is often used for the reliability analysis of a repairable system. In order to derive a quantitative reliability value of repairable system, we analyze the failure data of the air brake system of the train line 7. The quantitative value is the failure intensity function that was modified, converted into a cost-rate function. Finally we studied the optimal number and optimal interval in which the costs to a minimum consumption point as cost-rate function. The minimum cost point was 194,613 (won/day) during the total life cycle of the braking system, then the optimal interval were 2,251days and the number of optimal preventive maintenance were 7 times. Additionally, we were compared to the cost of a currently fixed interval(4Y) and the optimum interval then the optimal interval is 3,853(won/day) consuming smaller. In addition, judging from the total life, "fixed interval" is smaller than 1,157 days as "optimal interval".

• Advances in concrete construction
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• 제7권1호
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• pp.11-22
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• 2019

A comprehensive assessing approach for durability of reinforced concrete structures dealing with the corrosion process of rebar subjected to the attack of aggressive agent from environment was proposed in this paper. Corrosion of rebar was suggested in the form of combination of global corrosion and pitting. Firstly, for the purposed of considering the influence of rebar's radius, a type of Plane Corrosion Model (PCM) based on uniform corrosion of rebar was introduced. By means of FE simulation approach, global corrosion process of rebar regarding PCM and LCM (Linear Corrosion Model) was regressed and compared according to the data from Laboratoire $Mat{\acute{e}}riaux$ et $Durabilit{\acute{e}}$ des Constructions (LMDC). Secondly, pitting factor model of rebar in general descend law with corrosion degree was introduced in terms of existing experimental data. Finally, with the comprehensive numerical simulation, the durability of an existing arch bridge was studied in depth in deterministic way, including diffusion process and sectional strength of typical cross section of arch, crossbeam and deck slab. Evolution of structural capacity considering life-cycle rehabilitation strategy indicated the degradation law of durability of reinforced arch bridges.

• 한국인터넷방송통신학회논문지
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• 제14권2호
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• pp.23-34
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• 2014

소프트웨어 프로젝트에 대해 12개의 다른 소프트웨어 생명주기 모델들이 제안되었지만 모든 소프트웨어의 특성을 만족시킬 수 있는 일반화된 모델이 없는 실정이다. 개발조직은 여러 모델들을 적절히 혼합하여 개발될 시스템과 능력에 맞도록 새로운 모델을 개발하여야만 한다. 본 논문에서는 다양한 소프트웨어 개발 상황에 보다 적합할 것으로 판단되는 중첩-동시개발 생명주기 모델을 제안하였다. 먼저, 개발 과정을 추상화와 구현으로 구분하여 추상화는 개념정립단계부터 상세설계단계 시작시점까지로, 구현은 상세설계단계부터 시스템 시험단계로 분류하였다. 다음으로, 추상화는 파레토 법칙을 적용하여 하나의 단계에서 개발될 기능이 20% 진행된 시점에서 다음 단계를 시작하는 중첩된 단계 개념을 도입하였다. 구현은 하나의 UC가 완료되면 바로 다음 단계 수행 팀에게 전달하여 여러 단계가 동시 수행되어 개발하는 형태를 도입하였다. 제안된 모델은 개발자원 활용의 비효율성을 크게 줄일 수 있는 장점이 있다. 제안된 모델을 적용시 보다 빠른 시간에 보다 저렴한 비용으로 보다 좋은 품질의 소프트웨어를 개발하여 고객에게 납품할 수 있어 고객을 만족도를 향상시킬 수 있으며, 더불어 소프트웨어 개발 성공률을 높이는데도 기여할 것으로 판단된다.

• 수산해양교육연구
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• 제28권4호
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• pp.1014-1023
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• 2016

The purpose of this study is to suggest improvement directions and strategies for the minimization of ex-post damage and prevention of the generation of derelict fishing gear which lead to decreased fisheries resources and deteriorated marine ecosystem through ghost fishing and damaging spawning and growth grounds. Current problems related to derelict fishing gear in Korea are lack of reliable data on the generation amount of derelict fishing gear, absence of life-cycle monitoring and management system, insufficient supports for derelict fishing gear collection programs and R&D investment in environmentally friendly fishing gear, etc. Thus, this study suggests three basic improvement directions to prevent the generation and minimize the damage of derelict fishing gear. Such improvement directions contain more detailed strategies such as establishment of fishing gear management law and life-cycle management system, strengthening entry regulations on fisheries causing serious ghost fishing problems, increased supports for R&D investment and dissemination of bio-degradable fishing nets, and promotion of voluntary agreements among competing fishermen's groups.

• Structural Engineering and Mechanics
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• 제62권2호
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• pp.225-236
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• 2017

The purpose of this work is to predict ductile fracture of structural steel under extremely low cyclic loading experienced in earthquake. A cumulative damage model is proposed on the basis of an existing damage model originally aiming to predict fracture under monotonic loading. The cumulative damage model assumes that damage does not grow when stress triaxiality is below a threshold and fracture occurs when accumulated damage reach unit. The model was implemented in ABAQUS software. The cumulative damage model parameters for steel base metal, weld metal and heat affected zone were calibrated, respectively, through testing and finite element analyses of notched coupon specimens. The damage evolution law in the notched coupon specimens under different loads was compared. Finally, in order to examine the engineering applicability of the proposed model, the fracture performance of beam-column welded joints reported by previous researches was analyzed based on the cumulative damage model. The analysis results show that the cumulative damage model is able to successfully predict the cracking location, fracture process, the crack initiation life, and the total fatigue life of the joints.