• 정보처리학회논문지:소프트웨어 및 데이터공학
• /
• 제4권1호
• /
• pp.1-8
• /
• 2015

고안전성이 요구되는 소프트웨어의 경우 극히 낮은 확률로 발생하는 오류로 인하여 전체시스템의 안전에 치명적인 상황을 야기할 수 있으므로, 철저한 안전성 검증이 요구된다. 하지만 모든 가능한 실행경로를 고려해야 하는 안전성 검증은 고비용이 발생한다는 단점이 있다. 본 논문에서는 안전성 검증의 고비용 문제를 개선하기 위해 안전성 특질을 기준으로 코드 슬라이싱 기법[1]을 구현한 도구를 개발하였다. 개발한 도구를 OSEK/VDX[2] 기반의 개방형 차량 전장용 운영체제인 Trampoline[3] 소스코드에 적용한 결과 분석 대상의 코드의 크기를 평균 71% 줄일 수 있었고, 실제 검증을 수행했을 시에도 도구 적용 이전보다 검증 비용을 절감할 수 있었음을 보였다.

• Genomics & Informatics
• /
• 제3권1호
• /
• pp.1-7
• /
• 2005

Case-control studies are widely used for disease gene mapping using individual genotyping data. However, analyses of large samples are often impractical due to the expense of individual genotyping. The use of DNA pooling can significantly reduce the number of genotyping reactions required; hence reducing the cost of large-scale case-control association studies. Here, we discuss the design and analysis of DNA pooling genetic association studies.

• Obstetrics & gynecology science
• /
• 제61권6호
• /
• pp.698-701
• /
• 2018

We report a rare case of vaginal amelanotic melanoma. Malignant melanomas are cutaneous and extracutaneous tumors that arise from embryological remnants of neural crest cells/melanocytes. Amelanotic melanomas at such rare locations can be misdiagnosed both clinically and radiologically. Therefore, histopathological examination and immunohistochemistry are mandatory for the diagnosis of these tumors. We diagnosed this case using histopathology and confirmed the diagnosis based on the presence of immunohistochemical markers human melanoma black 45 (HMB45) and S-100.

• International Journal of Precision Engineering and Manufacturing
• /
• 제5권3호
• /
• pp.35-42
• /
• 2004

This research describes that the cutting characteristics and tool wear behavior in the micro cutting of three kinds of wear resistant cemented carbides (WC-Co; V40, V50 and V60) using PCD (Poly Crystalline Diamond) and PCBN (Poly crystalline Cubic Boron Nitride) cutting tools by use of the SEM (Scanning Electron Microscope) direct observation method. The purpose of this research is to present reasonable cutting conditions from the viewpoint of high efficient cutting refer to a precise finished surface and tool wear. Summary of the results is as follows: (1) The cutting forces tend to increase as the increase of the weight percentage of WC particles, and the thrust forces was larger than the principal forces in the cutting of WC-Co. These phenomena were different from the ordinary cutting such as cutting of steel or cast iron. (2) The cutting speed hardly influenced the thrust force, because of the frictional force between the cutting tool edge and small WC particles at low cutting speed region such as 2$\mu\textrm{m}$/s. It seemed that the thrust cutting force occurred by the contact between the flank face and work material near the cutting edge. (3) The wear mechanism for PCD tools is abrasion by hard WC particles of the work materials, which leads diamond grain to be detached from the bond. (4) From the SEM direct observation in cutting the WC-Co, it seems that WC particles are broken and come into contact with the tool edge directly. This causes tool wear, resulting in severe tool damage. (5) In the orthogonal micro cutting of WC-Co, the tool wear in the flank face was formed bigger than that in the rake face on orthogonal micro cutting. And the machining surface integrity on the side of the cutting tool with a negative rake angle was better than that with a positive one, as well as burr in the case of using the cutting tool with a negative rake angle was formed very little compared to the that with a positive one.

• 경영과학
• /
• 제19권2호
• /
• pp.91-124
• /
• 2002

The use of network planning models and tools is essential for effective KII (Korea Information Infrastructure) planning and analysis in that it will significantly reduce the risk and uncertainty embeded in the development and the provision of future broadband services. The purpose of this study is to develop a theoretical framework and a computer tool for modeling the various aspects of the KII topology and architecture and evaluating the techno-economic feasibility of the KII implementation strategy.

• 한국공작기계학회:학술대회논문집
• /
• 한국공작기계학회 2001년도 춘계학술대회 논문집(한국공작기계학회)
• /
• pp.418-421
• /
• 2001

For insuring and guaranteeing the quality and efficiency of machine tool from design phase, we studied the reliability analysis and design review method. We researched the feasibility study machining center with the proposed procedure and described the analysis outputs. From this study will contribute to guide and introduce the reliability design in developing and producing phase of high quality product.

• 대한안전경영과학회:학술대회논문집
• /
• 대한안전경영과학회 2008년도 춘계학술대회
• /
• pp.93-100
• /
• 2008

In this paper, we propose the application of the Human Factors Analysis and Classification System(HFACS) to analyze an aircraft accident data. HFACS is a general human error framework originally developed and tested within the U.S military as a tool for investigating and analyzing the human causes of aviation accidents. It was examined that HFACS reliably accommodate all human causal factors associated with the commercial accidents. We found that the HFACS could be used as a reliable tool for investigating aircraft accidents including a single accident analysis.

• 국제학술발표논문집
• /
• The 9th International Conference on Construction Engineering and Project Management
• /
• pp.1226-1236
• /
• 2022

Because students majoring in construction-related fields must develop a broad repository of knowledge and skills, effective transferal of these is the primary focus of most academic programs. While inculcation of this body of knowledge is certainly critical, actual construction projects are complicated ventures that involve levels of risk and uncertainty, such as resistant neighboring communities, unforeseen weather conditions, escalating material costs, labor shortages and strikes, accidents on jobsites, challenges with emerging forms of technology, etc. Learning how to develop a level of discernment about potential ways to handle such uncertainty often takes years of costly trial-and-error in the proverbial "school of hard knocks." There is therefore a need to proactively expedite the development of a sharpened intuition when making decisions. The AGC Education and Research Foundation case study committee was formed to address this need. Since its inception in 2011, 14 freely downloadable case studies have thus far been jointly developed by an academics and industry practitioners to help educators elicit varied responses from students about potential ways to respond when facing an actual project dilemma. AGC case studies are typically designed to focus on a particular concern and topics have thus far included: ethics, site logistics planning, financial management, prefabrication and modularization, safety, lean practices, preconstruction planning, subcontractor management, collaborative teamwork, sustainable construction, mobile technology, and building information modeling (BIM). This session will include an overview of the history and intent of the AGC case study program, as well as lively interactive demonstrations and discussions on how case studies can be used both by educators within a typical academic setting, as well as by industry practitioners seeking a novel tool for their in-house training programs.

• 경영과학
• /
• 제13권2호
• /
• pp.95-126
• /
• 1996

Information technology's potential for changing processes is widely acknowledged and various information technologies exist as a tool making business reengineering possible. Groupware is one of information technology that typically work in concert to bring out change in processes. This paper attempts to explain the importance of groupware as a critical information technology for business reengineering by developing a methodology of applying groupware to business reengineering. In order to understand the applicability of groupware to business reengineering, this paper has the following objectives. 1) Examines how the capability of groupware can play as a chang lever or enabler of process innovation explicitly. 2) Propose a integrated business reengineering methodology that incorporates process, process environment and information technologies specifically. A case study was used to provide the insight how groupware can play as a enabler of process innovation. The case was analyzed according to the reengineering methodology we proposed.

• 한국컴퓨터산업학회논문지
• /
• 제3권12호
• /
• pp.1697-1712
• /
• 2002

UML(Unified Modeling Language)은 소프트웨어 시스템의 명세화, 시각화, 생성, 그리고 문서화를 목적으로 하는 언어이다. 또한 UML은 소프트웨어 생성을 위한 청사진을 만들어줌으로써 소프트웨어 설계의 복잡한 과정을 단순화시킨다. 본 연구에서는 Rational Rose, BizWiz와 같은 자동화된 응용프로그램 생성 도구들을 실제의 사이버 쇼핑몰에 적용하여 UML 관점에서 비교 및 분석한다. 그리고 위의 결과를 바탕으로 고객관리 업무에 UML을 적용하여 체계적인 시스템 분석, 설계 및 구현방안을 제시한다.