• Proceedings of the KSR Conference
• /
• 2008.06a
• /
• pp.1128-1130
• /
• 2008

Bimodal tram is a new public transportation to improve the existing traffic system. The purpose of this study was to investigate the environmental characteristics of the developed bimodal tram through its life cycle. The used tool was life cycle assessment (LCA), which could evaluate environmental loads quantitatively for a product. Based on bill of material (BOM), the environmental impacts of bimodal tram was calculated from manufacturing to operating phase. Among impact categories, photochemical oxidant creation potential (POCP) was the highest, which was resulted from the manufacturing and the combustion of CNG used as a fuel of bimodal tram. In the future, the application of LCA results can enhance increasingly the environment of bimodal tram as an environmental-friendly transportation.

• Proceedings of the KSR Conference
• /
• 2008.06a
• /
• pp.1125-1127
• /
• 2008

Recently, the tilting train has been developed to increase speed in conventional line. Due to global environmental changes, it is necessary to investigate quantitatively the environment of tilting train. This study evaluated the environmental impacts of tilting train to grasp a key issue environmentally. The related data were collected from bill of material (BOM). The system boundary of tilting train was determined by its cumulative weight. In addition, the $CO_2$ emission in the operation phase of tilting train was calculated. Based on this basic study, the environment of tilting train will be assessed exactly through the establishment of life cycle inventory database for its main components.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.28 no.4
• /
• pp.28-40
• /
• 2005

This paper focuses on a BOM(Bill of Materials) management problem for a small and medium manufacturing company that produce automobile parts. Automobile part's manufacturers produce various products due to various automobile characteristics such as types, colors, and the other options of car. These products are classified into product groups with common parts. And each product group is regarded as a product family. This paper proposes an efficient and effective EXCEL-based BOM management scheme using characteristics of the product family. And we have implemented the practical EXCEL-based BOM management system for real small and medium automobile part's manufacturing companies.

• Journal of Computational Design and Engineering
• /
• v.2 no.3
• /
• pp.137-147
• /
• 2015

In this study, a new methodology in predicting a system output has been investigated by applying a data mining technique and a hybrid type II fuzzy system in CNC turning operations. The purpose was to generate a supplemental control function under the dynamic machining environment, where unforeseeable changes may occur frequently. Two different types of membership functions were developed for the fuzzy logic systems and also by combining the two types, a hybrid system was generated. Genetic algorithm was used for fuzzy adaptation in the control system. Fuzzy rules are automatically modified in the process of genetic algorithm training. The computational results showed that the hybrid system with a genetic adaptation generated a far better accuracy. The hybrid fuzzy system with genetic algorithm training demonstrated more effective prediction capability and a strong potential for the implementation into existing control functions.

• Korean Journal of Microbiology
• /
• v.26 no.3
• /
• pp.155-161
• /
• 1988

Nucleotide sequence homology between bovine, simian, and porcine rotavirus was determined by the RNA:RNA hybridization technique. Single stranded RNA, prepared in vitro with EDTA activated endogeneous viral RNA polymerase, was hhbridized with tritium labeled bovine rotavirus genomic RNA. The heteroduplex RNA was treated with single stranded RNA specific ribonucleases and the RNase resistant hybrid RNA was precipitated, and collected by filtration on a filter paper. Seventy four percent RNA sequence homology between bovine and simian rotavirus and 8 percent RNA sequence homology between bovine and porcine rotavirus was confirmed by hybridization between tritium labeled single stranded RNA and viral genomic RNA.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2002.05a
• /
• pp.258-265
• /
• 2002

분산 환경에서의 소프트웨어 개발관리를 효과적으로 지원하기 위해 필요한 기능 요건으로는 원격지 개발팀윈들 간의 협동작업 지원기능, 개발 과정에서 산출되는 각종 정보객체들의 저장 및 공유 지원기능, 개발에 필요한 각종 프로세스 관리기능 및 프로젝트 관리기능 등을 들 수 있는데, 본 연구에서는 이를 위해 정보객체 관리를 중심으로 하는 공동작업장 시스템을 설계하고, 이를 구현하였다. 즉, 설계 문서, 소스 코드 등과 같은 개발 과정에서 산출되는 각종 정보객체들의 구조 및 관계를 통합관리하는 틀로서 BOC(Bill Of Class)를 제안하며 BOC를 이용한 정보객체 관리 기능의 구조와 기능을 제시한다. 그리고, 제시한 정보객체 관리 구조를 기반으로 분산환경에서의 효과적인 소프트웨어 개발을 지원하는 공동작업장 시스템을 설계 및 구현하고 이의 유용성을 보인다.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2002.05a
• /
• pp.916-922
• /
• 2002

본 연구는 WfMS라는 사용환경 하에서, 워크플로우 프로세스라는 대상 객체를 BOM(bill of material) 정보로 부터 High Level Petri net 형식으로 자동적으로 생성할 수 있는 엔진의 개발을 궁극적인 목표로 설정하고 있다. BOM은 제조되는 제품의 구조에 대한 정보를 지니고 있다. 관리 및 생산이라는 두 도메인 사이의 차이점에도 불구하고, 생산 분야의 BOM 정보의 이용방식이 관리 프로세스의 설계에도 이용될 수 잇다는 사실을 먼저 설명한다. 워크플로우 프로세스는 Petri Net의 형식으로 표시한다. 주어진 BOM으로부터 이에 대응하는 petri net을 생성할 수 있는 매핑 알고리즘을 소개한다. 이러한 이론 및 알고리즘을 기반으로 하여, 주어진 BOM 정보로부터 이에 대응하는 Petri Net 정보를 자동으로 생성시키는 프로세스 디자이너의 프로토타입을 구현하여 소개한다.

• Proceedings of the Korean Powder Metallurgy Institute Conference
• /
• 2006.09b
• /
• pp.714-715
• /
• 2006

The Application of powder metallurgy (PM) aluminum structural parts is at its early growing stage, despite of some automotive applications. The market potential for PM aluminum, however, is large. Growth is expected from the market expansion of the existing applications and new applications, including the replacements of aluminum and zinc based castings and some ferrous PM automotive parts by PM aluminum. Compared to castings, PM is an efficient mass production technology. The PM aluminum is more competitive than die casting for some automotive applications. Besides weight saving leading to performance improvement, the total cost increase for aluminum PM parts is less than 15% compared to ferrous PM automotive parts. The future is promising for PM aluminum.

• Journal of Korea Technology Innovation Society
• /
• v.8 no.2
• /
• pp.702-731
• /
• 2005

This article examines the legislation process of bioethics from 1997 to 2003 in Korea through three phases from a policy network point of view. In the first phase, assemblymen proposed laws concerning bioethics and various policy agenda were shaped. In the second phase, MOHW(Ministry of Health & Welfare) and MOST(Ministry of Science & Technology) introduced bills separately and policy conflicts were increasingly deepened. In the third phase, after groping for policy coordination a single bill based on MOHW's proposal was deliberated and enacted. During these processes, actors in policy network were more enlarged, conflicting interactions were dominated, and the structure of policy network was alternated by centralized form and distributed form.

• Journal of Digital Convergence
• /
• v.7 no.4
• /
• pp.11-19
• /
• 2009

Electronic methods are already used in money transfer and credit cards transactions and electronic money and checks, which can substitute cash and coins, are being discussed. Recently, the Acts of Electronic Draft have been enacted, in order to make the money in the market flow efficiently. Also electronic bill of lading has been adopted for the practical use of international shipments. However, despite of the effort from the academia and practice, investments to stocks, especially in the stock exchange, is not quite perfectly electronic. Japan enacted a relevant act in 2004 which make its stock market totally dematerialized. This writing summarizes some issues in interpretation that arise in the course of operation of the Stock Electronic Registration System at the present time of 6 months after it came into effect and its purpose, by doing so, is to prevent in advance the kind of problems in introducing the similar system to Korea.