• Journal of applied mathematics & informatics
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• v.19 no.1_2
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• pp.297-310
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• 2005

The concept of the Moore-Penrose inverse in an indefinite inner product space is introduced. Extensions of some of the formulae in the Euclidean space to an indefinite inner product space are studied. In particular range-hermitianness is completely characterized. Equivalence of a weighted generalized inverse and the Moore-Penrose inverse is proved. Finally, methods of computing the Moore-Penrose inverse are presented.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 1995.10a
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• pp.691-696
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• 1995

Currently the systematic approaches to implementing CALS and reducing time-to-market are widely used, which is based on the concept of PDM. The concept of PDM is to maximize the time-to-market benefits of concurrent engineering while maintaining control of product data and distributing, it automatically to the people who need it - when they need it. In this paper, we developed PRO browser with these PDM functions which have the functions of managing the information of product, process and organization consistently and inter-referencing efficiently the data required in enaluation. In the PRO browser, throughout the design process improvement, the generic environments are embodied which make it possible to reduce product development sycle time and improve the quality of design.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.22 no.2
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• pp.292-297
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• 2013

Nowadays, a strategy of the self-optimizing machining process is an imperative approach to improve the product quality and increase productivity of manufacturing systems. This paper presents a concept of self-optimizing forming system that allows the forming system automatically to adjust the forming parameters online for guarantee the product quality and avoiding the machine stop. An intelligent monitoring system that has the functions of observation, evaluation and diagnostic is developed to evaluate the pully quality during forming process. Any abnormal variation of forming machining parameters could be detected and adjusted by an intelligent control system aiming to maintain the machining stability and the desired product quality. This approach is being practiced on the pully forming machine for evaluating the efficiency of the proposed strategy.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2006.05a
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• pp.1863-1871
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• 2006

This paper develops and defends the concept of reference-quality in consumer choice, demonstrating its impact on aggregated market demand. The concept of reference-quality refers to an internal standard against which observed qualities are compared in consumer choice behavior. In doing so, we examine and reveal the formation mechanism and the structure of reference-quality in the U.S. wireless phone market. Consequently, we recognize and introduce a brand-specific reference both in price and product quality in aggregated product demand which enable us to measures the responsiveness of market demand to the innovation of a certain brand.

• Journal of Power Electronics
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• v.2 no.3
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• pp.189-198
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• 2002

New concept of energy recovery for plasma display panel (PDP) Is proposed. Different from conventional LC resonant sustaining drivers, the current built up before inverting the polarity of the panel electrodes is utilized to change the panel Polarity together with energy Previously charged in Panel capacitance. This operation Provides zero -voltage-switching of switches and reduction of EMI by rejecting the surge current when the sustain switches are turned on. The build-up current helps to reduce transition time of panel polarity and may produce more stable light waveforms. This method shows a desirable characteristic that the circuit loss is similar to that of series resonant type energy recovery circuit which is very effective method.

• Journal of the Korea Safety Management & Science
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• v.12 no.4
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• pp.99-105
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• 2010

Product Liability is concerned with liability of a product itself. But, viewing from the management standpoint, Product Liability may have more significant influence on additional sales of the product after it has been supplied into the market. With regard to this, this study tried to make the following: First, this study examined the concept of 'Product Liability and enterprises' management attitude toward Product Liability. Secondly, through the case-analyses of Product Liability, a correlation study had been attempted to know the influence of corporate cultures and product safety activities on business management. Thirdly, this study tried to find the directions of Product Liability at the level of total management strategy.

• Design Convergence Study
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• v.14 no.1
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• pp.99-114
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• 2015

This study aims to find a way to realize gender identity in product design. After reviewing the present research, it was found out that it is necessary to extend notion of gender and to redefine the concept of gender design. Specific products were selected in order to analyze the characteristics of femininity. Refrigerators, which represent the femininity the best, were chosen and analyzed based on the graphic elements. As a result, the concept of gender have been used quite limitedly in a refrigerator. Since the stereotype of women has already been implicit, it was considered difficult to propose an alternative plan for realizing the extended concept of gender. Therefore, digital devices have been proposed for a potential alternative group. This product group, of course, has a limitation like the refrigerators. However, when functions, frequency of use, and use of space are considered in depth, It can be a possible group that holds the meaning of gender in design. This study is significant that it attempted to examine the possibility of convergence in identity and usability when the graphic elements of a product are constructed by gender design that considers the identity of a user through redefining the concept of gender.

• International Journal of Quality Innovation
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• v.10 no.1
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• pp.89-105
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• 2009

This study aims to probe into the influence of new product design and new product development process management on development performance. The research finding demonstrates that product design reveals positive and significant influence on new product development performance. Through statistical analysis, this study finds that companies in Taiwan value new product design. When companies value it more, they tend to have better new product development performance. With regard to the relation between new product development process management and new product development performance, the empirical results demonstrate that companies would pay more attention on new product development process management. With regard to new product idea and assessment, concept design and development, product function test and mass production in the market, through statistical analysis, this study finds that companies that value process management of new product development tend to have better new product development performance. As to the influence of new product design and new product process management on new product development performance, statistical analysis result demonstrates that the integration between new product design valued by companies in Taiwan and development process management would lead to significantly positive influence on new product development performance of the companies.

• International Journal of CAD/CAM
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• v.11 no.1
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• pp.1-10
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• 2011

Product lifecycle management (PLM) is a new business strategy for enterprise's product R&D. A PLM system holds and maintaining the integrity of the product data produced throughout its entire lifecycle. There is, therefore, a need to build a safe and effective product data model to support PLM system. The paper proposes a domain-based product data model for PLM. The domain modeling method is introduced, including the domain concept and its defining standard along the product evolution process. The product data model in every domain is explained, and the mapping rules among these models are discussed. Mapped successively among these models, product data can be successfully realized the dynamic evolution and the historical traceability in PLM system.

• Journal of applied mathematics & informatics
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• v.1 no.1
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• pp.79-84
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• 1994

The purpose of this paper is to introduce and discuss the concept of ${alpha}$-compactness for fuzzy topological spaces. And we obtain a product theorem for an arbitrary product of ${alpha}$-compact fuzzy spaces.