• 한국군사과학기술학회지
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• 제4권2호
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• pp.9-16
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• 2001

In this paper, general design process for Tracked Fighting Vehicle has been suggested. Stress analysis and optimal design for ply angle of IFV's composite upper hull has been calculated using KMA CIFV and it is contained exploratory development of design process. In this point, this paper applied composite to IFV's upper hull. Finite element mesh has been made using Matlab program, and we have analyzed stress based on the given material properties and ply arrangement. For each load condition, load distribution in plane and failure index are calculated by using Tasi-Hill criterion, which is composite failure criterion and analyzing change of failure index as change of ply angle. Finally, optimal ply angles of upper hull are calculated using KMA CIFV. We can estimate the decrease of weight for IFV's upper hull.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2001년도 춘계학술대회논문집:21세기 신지식정보의 창출
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• pp.300-310
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• 2001

본 논문에서는 가변하는 닻점을 이용하는 새로운 색역 사상 방법을 제안한다. 제안된 방법은 기존의 닻점을 사용하는 색역 사상에서 발생하는 휘도 범위의 축소를 가변하는 닻점을 이용하여 보상하여 준다. 또한 이과정에서 연속 계조 칼라를 재현하기 위하여 색역을 여러 영역으로 구분하여 각각의 영역에서 다른 닻점을 사용하는 다중 닻점 방식을 제안한다. 따라서 본 논문에서는 저가의 칼라 출력장치에서 고화질의 칼라를 재현할 수 있게 한다.

• 품질경영학회지
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• 제42권2호
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• pp.145-152
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• 2014

Purpose: As the number of people directly employed in making things declines, the cost of labour as a proportion of the cost of production and delivery will diminish too. This will make to move the focus of quality management because new manufacturing techniques make it cheaper and faster to respond to changing local tastes Methods: This discussion is induced by understanding that change the point of view of quality. Results: Mark-processing method using a mold of 3D-printer is different from traditional manufacturing methods. Design, rapid prototyping of products produced by the right way, many changes in many industries will be created. Therefore, the design will be more emphasis on the importance of quality. Conclusion: As manufacturing goes digital, a Quality great change is now gathering pace. It will allow things to be made economically in much smaller numbers, more flexibly and with a much lower input of labour, thanks to new materials, completely new processes such as 3D printing. So we must change the vantage point of quality, from process to Design, R&D, and Delivery.

• 한국경영과학회지
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• 제24권4호
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• pp.81-94
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• 1999

Organization change projects such as Business Process Redesign(BPR) have been implemented by many firms for enhancing their organizational performance. However, management is reluctant to initiate these projects due to enterprise-wide impact and steeper project cost than the traditional system development projects. Thus, there emerges a need to accurately assess the value of the redesigned organizational process for the successful implementation of BPR projects. The purpose of this study is to assess the value of process redesign in the point of resource utilization and allocation, and cycle time and cost reduction. The candidate process and the design alternatives are identified from organizational requirements analysis. The variables and their relations are defined to perform task activity analysis, bottleneck analysis, cycle cost analysis, and resource utilization analysis. A Case study of a manufacturing company indicates that the assessments method proposed in this study is a promising approach to identify the business alternative process that lead to the highest organizational performance.

• 한국전자거래학회지
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• 제3권2호
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• pp.141-160
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• 1998

In order to achieve a successful introduction of CALS, an enterprise model which is a concise description of what an enterprise does is required. The enterprise model mainly consists of a process model and a data model. The process model describes processes that create, change, combine, or destroy the entities within the enterprise. Several process modeling methodologies have been proposed. Each modeling methodology requires its own modeling view point, elements, and syntax. In developing a process model for CALS, these models created at different view points are required to analyze and design a system in a broad view. This paper aims at proposing an integration methodology for a process model. Specifically, IDEF0, IDEF3, and Petri Net are considered to be integrated. An IDEF0 model describing static functions of enterprise is transformed to an IDEF3 model describing behaviour of a system with additional information. Also, the IDEF3 model is transformed to a Petri Net model. These transformations will be automatically accomplished once the additional information for the transformation is provided.

• 한국전기전자재료학회논문지
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• 제18권3호
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• pp.206-211
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• 2005

The device makers want to make higher density chips on the wafer through scale-down. The change of WSix/poly-Si gate film thickness is one of the key issues under 100 nm device structure. As a new device etching process is applied, end point detection(EPD) time delay was occurred in DPS+ poly chamber of Applied Materials. This is a barrier of device shrink because EPD time delay made physical damage on the surface of gate oxide. To investigate the EPD time delay, the experimental test combined with OES(Optical Emission Spectroscopy) and SEM(Scanning Electron Microscopy) was performed using patterned wafers. As a result, a EPD delay time is reduced by a new chamber seasoning and a new wavelength line through plasma scan. Applying a new wavelength of 252 nm makes it successful to call corrected EPD in WSix/poly-Si stack-down gate etching in the DPS+ poly chamber for the current and next generation devices.

• 멤브레인
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• 제6권2호
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• pp.109-116
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• 1996

본 연구는 흡착과 막분리를 결합시킨 혼성 시스템을 폐수처리에 응용하기 위한 기초 연구로서, 페놀을 분말활성탄에 의해 흡착하고, 흡착된 페놀을 활성탄과 함께 정밀여과에 의해 분리하였다. 분말활성탄의 입자크기가 클수록 여과저항은 감소하였으며, 활성탄의 양이 적을수록 단절점(break point) 이전의 투과농도 변화율과 페놀 부하 변화율은 증가하였다. 분말활성탄의 입자크기가 작을수록 활성탄의 외표면적과 경막물질전달계수의 증가로 인해 단절점 전의 투과농도는 감소하였다.

• 한국생산제조학회지
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• 제19권4호
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• pp.511-520
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• 2010

In general, spot welding is used at no welding rod or flux for the process, low welding point temperature compared to arc welding, short heating time, less damage to the parent material, and low deformation and residual stress, relatively. Also, because of the pressurization effect, better mechanical qualities of the welding parts are obtained. Therefore, in various fields of industry its rapid operation speed can make mass production possible such as motor industry. In FEM analysis for the spot welding process, it is effective to use simple modeling rather than complicated one because of its numerous number of spots and reduction of analysis time. Therefore, this study provides with not only simplification of modeling analysis by using beam component composition of structure without re-compositing the spot welding point mesh but also modeling analysis of which property of fracture strength is reflected. In addition complete spot welding model is examined at rectangular post shape (hat shape) by impact test, compared the results, and verified its validity. As a result, it is possible to optimize the welding position and to recognize the strength of structure and the proposed equal distance model shows the effect of welding point reduction and improvement of stiffness.

• 대한가정학회지
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• 제18권4호
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• pp.75-85
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• 1980

The consumer affair is one of the rapidly evolving problems in the process of recent economic growth. As the society and its economy changes, the nature and the scope of the consumer affairs also changes. while the main concept of the consumer affaires originated from the market mechanism, it is now expanding beyond the market mechanism to include everyday lives of consumers. In solving the problems which arise form the status difference between the manufacturer and the consumer the manufacturer's action is no less important the consumer's self-improvement of its status. The manufactures with the purpose of getting maximum profits from the consumers are conducting the consumer oriented managerial marketing, but this sis done form the manufacturer's point of view with the consumer's position being neglected. It is the purpose of this paper to investigate the nature and direction of the marketing from the consumer's position being neglected. It is the purpose of this paper to investigate the nature and direction of the marketing from the consumer's point of view. For this study a couple of pre-investigations were done. First, I surveyed the changing consumers with economic growth the developing process of marketing, and the cause and characteristics of the today's consumer affaires. Second, I studied the concept change of the modern marketing, and the concept of the consumerism which was materialized by this concept change. I further studied, with the consumer's point of view, the socioecological marketing which is based on the consumerism. The conclusion of this investigation is that the manufacturers should convert the in humanized marketing to the more human and environment conscious socioecological marketing because the consumer affairs which arise from the mass consumption of the modern days are expanding to include everyday's problems. This conversion naturally should be based on the human concept based consumerism. To be more effective, the manufactures should assume more social responsibilities and conduct the socioecological marketing voluntarily and willingly.

• 한국표면공학회:학술대회논문집
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• 한국표면공학회 2017년도 춘계학술대회 논문집
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• pp.90-90
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• 2017

Cold spray (Cold gas dynamic spray, kinetic spray) is the latest spray coating process that is known as solid state deposition process. In cold spray, inert gases (typically nitrogen and helium) accelerate powder particles prior to impact onto the substrate. Accelerating particles start to deposit onto the substrate after reaching certain critical velocities depending on the coating materials and substrate. Since process gas temperatures are kept below to melting temperature of the coating materials, it is possible to spray temperature sensitive materials such as copper and titanium, nanocrystal materials, and amorphous metals without affecting the phase change and oxide formation. It is also possible to deposit thick coatings because cold spray coatings present compressive residual stresses. This ability to deposit thick coatings is suitable to repair or rebuild parts as an additive manufacturing process. In this presentation, cold spray is introduced and compared to other additive manufacturing processes such as laser and electron beam based processes. It is also presented some applications especially in the view point of additive manufacturing process.