• 대한안전경영과학회지
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• 제17권4호
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• pp.373-379
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• 2015

Supply units in each command are multi-tiered and each supply unit keeps a supply level independently, which can cause excess stock, leading false reports to the Logistics Command and increasing difficulties in managing user needs. This causes excess assets and the excess then causes deformation in demand. therefore, the supply support systems of our armed forces have become high-cost/low-efficiency and are insufficient to meet the needs of users in combat units. Civilian corporations and the US Department of Defense are downsizing the aforementioned multi-tiered supply systems thus revolutionizing efficient and effective logistics by adopting Supply Chain Management(SCM), and Prime Vendor policies. Prime Vendor policy is a logistics support method that allows users to directly request and receive supply items from suppliers, based on supply contracts between suppliers and central maintenance organizations like KDA. In other words, it is a system that allows for users to make orders to suppliers directly and suppliers to deliver goods to the users directly, cutting out the middle stage, thus allowing an efficient supply. This is a way forward in finance that cuts costs in net supplies and allows an efficient utilization of civilian assets. which is also known to fasten the speed of logistical support and stripping down the logistical structure. therefore, this report will explore Prime Vendor policies adopted in certain number of units for medical supplies that were taken in consideration of improvements in stock management in civilian organizations and the US Army, and aims to apply such policies for repair parts.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 1999년도 학술대회지 vol.1
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• pp.277-299
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• 1999

Since Chrysler Motor Co. had experienced the digital development system in the beginning of 1990's, most of leading automobile companies are trying to apply a digital information system for their own business process reengineering based upon concurrent engineering system from product planning phase. This is called as virtual DMU(Digital Mock-Up) system instead of the traditional PMU(Physical Mock-Up) system. By using the virtual prototype, all of the design requirements and system specifications can be checked, changed and optimized more quickly and more efficiently. This paper consists of five chapters for the DMU information system. In the 1$^{st}$ chapter, the principle of digital design system is suggested by using four basic modules such as product design module, process design module, manufacturing system design module and central control module. The basic scheme of DMU is introduced with the benefits of application in the chapter 2. In the chapter 3, a digital design process of new car development is explained with the detailed DMU design and design review processes. In the chapter 4, the practical DMU manufacturing techniques and applications are introduced as CAD/CAM analyses, DPA(Digital Pre-Assembly)reviews for development, production, operation and maintenance phases, digital tolerance analyses and digital factory analyses for assembling line simulation, automated robot welding processes, production jig ＆ fixtures and painting process simulation. Finally, the activities of digital design support; CAS-styling, CAE-engineering and CAT-testing are summarized for design optimization in the chapter 5. As today's automobile manufactures and related business organizations are struggling to compete in the global marketplace, they are concentrating on efficient use of DMU information system to reduce the new car development cost, to have shorten the delivery schedule and to improve product design quality. To meet the demand of those automobile industries on digital information systems, the CALS(Computer aided Acquisition and Logistics Support) and EC(Electronic Commerce)initiative has been focused as a dominant philosophy in defense ＆ commercial industries, specially automobile industries.s.

• 대한기계학회논문집A
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• 제24권1호
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• pp.1-6
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• 2000

As dies and molds have become more and more complicated in the recent years, the demand for lower cost and shorter production time is also growing stronger. Rapid prototyping and Tooling technologies are expected to be used for more rapid and lower cost tool fabrication. However the rapid tooling methods have not yet reached the level of application to the manufacturing of metallic dies and molds which require high dimensional accuracy. As the rapid tooling technology, there are the slurry casting, the powder casting, the direct laser sintering, and so on. Generally, in the slurry casting, the alumina powder and the water soluble phenol were mainly used. However, the mechanical properties of the phenol were not good enough to apply to molds directly. In this study, pure epoxy and two types of aluminium powder reinforced resin are applied to the slurry casting. The mechanical and thermal properties are better than phenol because the epoxy is the thermosetting resin. And mechanical characteristics such as shrinkage rate, hardness, surface roughness are measured for the sake of comparison. Metal powder reinforced resin molds are better than the resin tool form the viewpoint of shrinkage rate and hardness. Finally, it has been shown that the application possibility of this process is high, because the manufacturing time and cost savings are significant.

• 한국컴퓨터정보학회논문지
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• 제17권12호
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• pp.229-239
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• 2012

본 논문은 위치기반서비스와 증강현실 기술을 관련연구로 분석하고 스마트폰 환경에서 위치기반서비스와 현실감이 뛰어난 증강현실을 결합하여 마치 실제 현장에서 쇼핑을 하고 구매하는 것과 동일한 환경을 제공하며 실제의 상황을 특징화하여 정보를 제공하는 시스템을 설계 및 구현한다. 국내의 경우 스마트폰 사용자가 2000만 명을 넘어 이에 따라 소비자의 수요에 맞추어 다양한 애플리케이션이 개발되었으며 특히 위치기반서비스와 현실의 사물에 대해 가상의 관련 정보를 덧붙여 주는 증강현실을 결합한 정보서비스 관련 애플리케이션이 눈에 뛰게 증가되어가고 있다. 본 논문에서 제안한 시스템은 기존의 웹기반의 시스템의 기능과 서비스의 효과를 비교 분석한 결과, 휴대폰의 장점인 이동성과 확장성 및 증강현실로 인해 현실감이 뛰어나며 언제 어디서나 사용 가능한 유비쿼터스 환경에 적합한 시스템으로 응용될 수 있는 장점을 가진다.

• Journal of Korea Trade
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• 제23권8호
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• pp.1-26
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• 2019

Purpose - This paper investigates the recent trade collapse, recovery, and prolonged slowdown to shed light on the discussions about whether the current slowdown is structural or cyclical. I examine structural, cyclical, and heterogeneous aspects of the recent trade trends using detailed statistics of a small open economy, South Korea, whose economic success and growth have been heavily dependent on exports. Design/methodology - I use both aggregated and disaggregated trade statistics of South Korea. I apply the following methodologies: 1) I decompose the trade growth into the extensive and the intensive margin and observe the effect of prices over time. 2) I estimate the trade-income elasticities focusing on the world's import demand, separately for goods from the world and from Korea. 3) I compare the drop in goods exports in slowdown and trade collapse, which are the two unusual periods in the recent history when world trade has substantially dropped altogether. Findings - I show that while the last drop of trade after 2015 has cyclical aspects, there is evidence that the continued slowdown from 2012 is structural: 1) the so-called 'China factor' is found in the analysis of trade-income elasticity of the world and China for imports from Korea. 2) The bilateral trade barriers between Korea and its principal trading partners are universally tightening. 3) Firm sizes, destination countries, and the mode of transactions affect disaggregated trade flows during the slowdown periods. Originality/value - This paper contributes to the debate regarding whether the current trade slowdown is structural or cyclical. I provide two concrete evidence that the export drop in 2015 stems from low oil prices: one is the divergence of Korean export value index from its export quantity index, which started in late 2014 when oil prices plunged. I also contribute to the literature by providing evidence that Korea's trade barriers with important trading partners are steadily increasing since 2012 as the protectionist measures toward Korea's export products are steeply increasing after the global financial crisis.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2006년도 춘계공동학술대회 논문집
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• pp.187-192
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• 2006

In the absence of a clear command and control structure, a key challenge in supply chain management is the coordination and alignment of the supply chain members who pursue divergent and often conflicting goals. The newsvendor model is typically used as a framework to quantify the cost of misalignment and to assess the impact of coordination initiatives. This paper considers a fuzzy approach for the newsvendor problem which includes a single manufacturer and a single retailer. We use several fuzzy parameters in the model such as the demand, the wholesale price, and the market sales price. We apply a coordination policy, referred to as buyback, to solve the fuzzy newsvendor problem. Based on the buyback policy, the optimal order quantity of the retailer can be computed, and the possible profits of the members in the supply chain can be calculated with minimum sharing of private information. Focusing on the fuzzy model with buyback policy for the newsvendor problem, we illustrate exemplary fuzzy models. We also illustrate an integration model, which extends a single-manufacturer-single-retailer model to the single-manufacturer-multiple-retailer setting. In the extended model, we consider three coordination policies including quantity discount, profit sharing, and buyback, as well as non-coordination case.

• 한국통신학회논문지
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• 제35권11C호
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• pp.929-939
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• 2010

멀티미디어 기술이 발전함에 따라 대용량의 데이터베이스의 관리와 불법 복제물 검출을 위한 동영상 검색의 필요성이 커지고 있다. 본 논문에서는 이러한 요구에 맞춰 대용량 데이터베이스에서 고속 동영상 검색을 수행할 수 있는 방법을 제안한다. 고속 동영상 검색 방법은 프레임의 휘도 분포를 이용하여 공간적 특징을 추출하고, 동영상의 시간적 유사성 지도를 생성하여 시간적 특정을 추출한다. 동영상의 공간적 특정과 시간적 특정을 식별자로 구성하고 단계적인 정합 방법을 수행한다. 실험에서는 원본 동영상과 밝기 변화, 압축률 변환, 자막/로고 삽입과 같은 다양한 변형을 이용하여 정확성, 추출 및 정합 속도, 식별자 크기를 측정하여 성능을 평가하였다. 또한, 제안한 방법의 파라미터를 실험적으로 선택한 과정을 기술하고 비교 알고리즘과 공간적 특정만을 이용한 단순 정합 결과를 제시하였다. 정확성, 경색 속도 식별자 크기의 모든 결과에서, 제안한 고속 검색 방법이 대용량 데이터베이스의 동영상 경색에 가장 적합한 기술임을 보였다.

• Journal of Welding and Joining
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• 제25권6호
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• pp.71-77
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• 2007

Until now, many researches on laser-arc hybrid welding processes have been conducted mainly for high power CW laser and high direct current arc to weld the thick steel plates for shipbuilding. Recently, however the usage of thin steel plates, which tend to be deformed easily by thermal energy, is been increasing because of demand of light structure such as car body in the automobile industry. Accordingly, heat sources having relatively low heat input such as pulsed laser, dip-transfer DC GMA and pulsed GMA seem to be applied more increasingly and the study about those heat sources is needed more intensively. Any heat source mentioned above can not stand alone without weld defects at a relatively high welding speed for increasing the welding productivity. This is main reason to apply the hybrid welding process which uses pulsed laser and low-heat-input GMA heat sources simultaneously to weld the thin steel plate. In this study, parameters of pulsed laser and dip-transfer DC GMA welding are studied firstly through preliminary experiments, and then analyzed in the viewpoint of their physical phenomena. Before conducting the hybrid welding, a pulse control technique is developed based on the parallel port communication and Visual C++ 6.0. Owing to development of this technique, interactions of laser and arc pulses can be controlled consistently. Using the pulse control technique, the hybrid welding is conducted and then its interactive welding phenomenon is analyzed.

• 한국콘텐츠학회논문지
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• 제9권9호
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• pp.191-198
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• 2009

21세기는 기술 발달로 인해 소재의 다양화와 학문적 연계를 통한 디자인 결합은 우리의 삶에 있어 다양한 욕구의 변화를 가져왔으며, 그로인해 시각적인 관심과 함께 기능적 역할의 조화로 자기 개성에 맞는 디자인 개발이 관심의 대상이 되고 있다. 최근 다양한 소재를 이용한 디자인 개발이 추세이고 이러한 디자인 경향은 개인의 감성과 취향을 존중하고 있으며, 이에 따라 다변화 되고 있다. 생활수준의 향상으로 건강과 개성에 대한 관심과 향기에 대한 관심이 높아지고 향(香)은 기억이나 감성 등 개인의 취향과 개성에 맞게 다양한 형태로 개발되고 있다. 이에 본 연구자는 향기 나는 소재를 사용하여 기계적인 특성과 미적 요소를 가미한 소재를 가지고 소비자의 감성적 욕구에 맞게 장신구 분야에 적용하고 시각적 디자인에 후각을 접목하면서 여성의 보조적 디자인에서 벗어나 남성만의 개성과 감성을 표현 할 수 있는 남성 신변장신구에 대한 활용 방안을 제시 하고자 한다.

• 대한한방부인과학회지
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• 제21권3호
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• pp.90-98
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• 2008

Purpose: Menopausal syndrome is caused by urgent changes of sex hormone in women. The hormonal therapy can soothe the problems of menopausal patients, but it can increase the probability of another disease, such as breast cancer, heart attack, etc. So the demand of alternative herb therapy is increasing in Western countries. In Korea, herbal medicine is imported and used by Western doctors. To know and use the alternative herbal medicine, Korean Medical doctors should know their efficacy and safety. Methods: We researched the Medline(Pubmed) with the key word such as 'CAM', 'herb' and 'menopause'. We selected the herbs known as treating the menopausal syndrome and researched the similar or same herbs that are used in Korean medicine by the scientific name and efficient ingredients. To evaluate the efficacy of the herbs, we compared the herbs that were differently defined in alternative and Korean medicine Results: Balm, black cohosh, chaste berry, dong quai. evening primrose oil. ginkgo, St. John's wort, valerian root, and sarsaparilla were chosen as prevalent herbs used in alternative medicine. The pharmacologic effect of Black cohosh, licorice root, St. John's wort were recognized. But these three herbs are not usually prescripted for menopausal patients in Korean medicine. So we could apply these three herbs as one of Korean medical treatments. The efficacy of other herbs cannot be surely prescripted for menopausal patients. Conclusion: The efficacy and safety of alternative medicine is not proved yet. But to diversify the treatmental methods of Korean medicine, we need to prove and use these medicine as one of Korean medical treatment.