• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2014.04a
• /
• pp.366-370
• /
• 2014

Considering a countermeasure against vibration along the existing line, in many cases, it may be the most efficient method to replace existing fasteners with high resilient fasteners because of the restriction of the construction of a new track type. There are many types of high resilient fasteners which are different in price and performance. Therefore it is important to choose the high resilient fastener which has best vibration-proof performance per price. In this study, a prediction method which can exactly evaluate the performance of a fastener in the reduction the ground borne noise in the existing line is presented, which is constructed based on the combination of the measurement and the simulation. A numerical example using the presented method is introduced to evaluate the vibration-proof performance for the solution of the vibration problem in the existing line.

• Transactions of Materials Processing
• /
• v.24 no.6
• /
• pp.387-394
• /
• 2015

Air springs are designed to support loads using the volume elasticity in a cylindrical shaped air bag made of a composite material with a rubber matrix and two plies of reinforced fibers. Recently, applications of these springs have been expanded from railway vehicles to passenger cars. The current study presents a finite element analysis of a manufactured air spring for a passenger car. The analysis was conducted including the mounting steps of the air bag using a static loading condition. A method for controlling the internal pressure and displacements during the mounting step was developed. The characteristic load curve and the shape of the air bag were in good agreement with the experimental data with respect to the design height, the bump height and the rebound height. Results indicate that ply angles of fibers vary from 38 degrees to 56 degrees during static loading.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
• /
• 2011.06a
• /
• pp.22-24
• /
• 2011

본 연구는 예부선 선원이 해상작업 시 발생할 수 있는 근골격계 부담 작업의 위험성을 평가 하기위해 실행되었다. 근골격계 부담 작업은 예부선 선원들의 인터뷰, 작업 분석, 자세 평가를 통해 분석을 통해 분석이 되었으며, 도출된 근골격계 부담 작업은 인간공학 분야에서 작업자세 평가 도구인 OWAS, REBA를 활용하여 분석을 실시하였다. 분석을 위해 오일 탱커 부선에서 작업을 하는 예부선 선원들의 송유관 체결 작업과 모선과 접안을 위한 줄 잡기 작업을 분석하였으며 해당 작업들은 OWAS 점수 3점과 REBA 점수 9점 이상으로 해당 작업이 근골격계에 부담되는 작업이며 작업자세 교정이 필요한 것으로 나타났다. 따라서 예부선 작업환경의 위험성이 외부환경에 대한 위협뿐만 아니라 작업자의 작업자세가 장기적인 위협을 보이고 있음을 보여주었다.

• Proceedings of the KSR Conference
• /
• 2003.10c
• /
• pp.395-400
• /
• 2003

Adhesive joining technique is considered as one of hot issues in developing advanced composite structures. The designer should be familiar with important guidelines of fundamental principles and ideas underlying the design and application of adhesive joints for a correct joint design. This study deals with the following characteristics of adhesive joining techniques: (1) design parameters the affect the performance of joining, (2) fundamental principles and design methods of joining, (3) adhesive selection, (4) surface pre-treatment of the adherand, and (6) test methods. The results would be used to predict the performance of adhesive joints subjected to a thermal aging.

• The Korean Journal of Financial Management
• /
• v.15 no.2
• /
• pp.55-80
• /
• 1998

영국의 베어링사, 미국의 오렌지 카운티, 미국의 프록터앤 갬블사 등 최근의 유명한 대형금융사고에는 파생금융상품이 관련되어 있었다. 최근 국내에서도 파생금융상품과 관련된 대형금융사고가 발생하였다. SK증권은 $\ulcorner$다이아몬드 펀드$\lrcorner$라는 역외펀드를 설립한 후, JP Morgan과 파생금융상품을 거래하였는데 최근의 동남아 통화위기로 인하여 SK증권은 커다란 손실을 본 것이다. 본고에서는 거래된 파생금융상품에 대한 정밀한 분석을 통하여 SK증권과 JP Morgan은 서로 엔화 및 바트화에 대한 외환옵션을 거래한 것과 동일함을 보인다. 또한 본고에서는 거래된 파생금융상품에 대하여 계약체결시점의 적정가치를 계산한다. 이러한 분석은 파생상품의 위험관리를 위한 가장 중요한 첫 단계가 될 것이다. 분석결과를 요약하면 다음과 같다. SK증권은 JP Morgan으로부터 5,300만 달러를 차입하면서 약 5,800만 달러의 가치가 있는 상환액을 지급하기로 하였으며 또한 약 8,540만 달러의 가치가 있는 인도네시아 루피아화 연동채권을 8,700만 달러를 지급하고 매입하였다 따라서 파생금융상품계약에 따른 전체적인 손실은 약 660만 달러에 이르는 것으로 분석되었다.

• The Inventors News
• /
• no.59
• /
• pp.1-16
• /
• 2007

'여성 발명' 사업화 성공 가능성 확인/발행인 칼럼/특허청, WIPO와 업무협약 체결/특허수수료 휴대폰 결재/장영실 그리고 세종대왕/"세계여성발명대회 개최 적극 협조"/모든 여성경제인에게 기회 주어져/특허출원 쉬워져 여성.발명초보자에게 유리/결산.사진으로 보는 2007 여성발명품박람회/"창의적 교과과정으로 발명 조기영재 육성"/"발명전문인력 고교시절부터 육성한다"/역사 속의 발명품/하루 10분 발명교실/특허 Q&A/'제42회 발명의 날' 표창장 받은 문승자.서진순.김연희 회원/실존인물 임꺽정 소설인물 홍길동/특허청 서울사무소 고객공간 재배치/아이디어 착상 및 발명 기법/3만불 선진국 진입 "여성 경제력 커져야만 가능"/듀보스의 항생제/한.미.일.중.EU 5개국 특허협력/상표등록 이의신청제 모방상표 잡는 효자/발전설비진단시스템 특허출원 급증/보안기능 갖춘 휴대폰 기술 인기/일회용비밀번호 뜬다/협회소식

• The Journal of Society for e-Business Studies
• /
• v.10 no.2
• /
• pp.43-57
• /
• 2005

The web services concept is rising as a standard to integrate heterogeneous systems in distributed environment based on XML messaging. Recently, for that reason, many companies are trying to use web services for their B2C and B2B business. In order to successfully introduce the web services, it is required to guarantee a differentiated quality of web services. However, most of the current web services cannot provide differentiated policies for requested messages and the existing web servers cannot consider appropriately the quality factors of web services in the service level agreement between provider and consumer. In this paper, we analyzed appropriate quality factors of web services in application level and suggested priority allocation strategy for processes dealing with messages of web services using those factors. This strategy can allocate dynamically a priority to satisfy the service level agreement.

• Journal of Korea Port Economic Association
• /
• v.31 no.3
• /
• pp.75-91
• /
• 2015

This study aims to assess the competitiveness of 30 logistics centers that operate in the hinterland of the North Container Port at Busan New Port. Thirty-two key factors were selected from previous studies to analyze and improve competitiveness and expand business opportunities in the hinterland. Suggestions from logistics experts were also canvassed. These variables were then put through first- and second-factor analysis to verify validity and measure confidence levels; they were later categorized into five factors and 15 sub-factors impacting on competitiveness. The categorized factors were compared using the analytic hierarchy process (AHP) to assess the importance of each factor and sub-factor in the case of logistics centers in the North Container hinterland of Busan New Port. The findings indicate that factors related to the securing of significant amounts of container cargoes were of greater importance. On the other hand, relatively basic factors proved to be less important in improving the competitiveness of the port hinterland.

• Journal of Digital Convergence
• /
• v.13 no.5
• /
• pp.237-244
• /
• 2015

Export-led policies, FTA signed and economics of scale through a variety of market-oriented policies, such as regulations to improve market grew constantly. Accordingly, the correct decision making accurately analyze the economics market for decision, a problem has been an important issue in predicting. For accurate analysis and decision-making of the most common indicators of the stock market by proposing a number of indicators of economic transformation techniques were applied to the convergence model combining estimation and forecasts problem confirmed its effectiveness. Experimental result, gave the model estimation method to apply a transform to show the valid combinations proposed model state estimation result was confirmed in a very similar exercise aspect of the physical problem and the KOSPI index prediction.

• Journal of Society of Preventive Korean Medicine
• /
• v.16 no.2
• /
• pp.53-65
• /
• 2012

Objectives : This study aimed to analyze the fundamentals of a Korea-China FTA and suggest strategies for Korean medicine market that correspond with each scenario selected from foreseen circumstances after the conclusion of the FTA through the scenario planning, which is one of management techniques. Methods : Four scenarios have been established by means of key questions : the scope of FTA, health care policies, and the combination of western medicine(WM) and Korean medicine(KM). Each scenario is defined as the Maximized Competitive Market, Neutral Market, General Completive Market, and Conservative Market. This study suggests brand marketing, extending of health insurance coverage, launching local network, and strategy for Korean medicine based health promotion programs. Results and Conclusions : Although Korean medicine could be prompted by the trade policies between countries, related studies are very limited. Therefore, more research is needed to suggest the detailed strategies for change of Korean medicine market through various strategic analysis tools.