• Journal of Information Technology Applications and Management
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• v.11 no.3
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• pp.147-159
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• 2004

Empirical evidence on the maintainability of object-oriented systems is far from conclusive, partly due to lack of representativeness of the subjects and systems used in the study. The present research empirically examined this issue with the systems that are mission-critical. currently operational and maintained by professionals. It was found that the 00 group appeared to consume less time while maintaining more amount of software artifacts than the NOO counterpart. This economical utilization of time appeared evident regardless of software development life cycle. This was due to the usefulness of UML for impact analysis which contributed to effective comprehension and communication. Insufficient design specifications led to ambiguity and costly defects in transferring design solutions to development. Also. the encapsulation of 00 seemed to reduce mental loads at maintenance tasks and improved code reuse. However, the number of files to manage increased and thus. dependency management is required for the 00 systems.

• International Commerce and Information Review
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• v.10 no.2
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• pp.433-453
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• 2008

Customer satisfaction and loyalty are becoming an increasing salient topic in many firms and in academic research. This study places significance in establishing corporate marketing strategy via analyzing and understanding purchasing by Korean and Chinese customer, especially those for service store, who serve as the core in marketing activities. To objectives of this study are to investigate which antecedent variables have significant effects on consumer perceived satisfaction or loyalty and to examine whether these factors have differences between Korean and Chinese customer. To test the hypotheses, such antecedent variables as the product quality, service quality, store reputation, store image. All variables are significant factors in both Korean and Chinese customer. Under the current increasingly rapid competitive market, product/service quality, store reputation/image can provide customer satisfaction and loyalty, can generate continual customer expansion of current customer through the reuse intention and can contribute to the expansion of new customers.

• Environmental and Resource Economics Review
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• v.16 no.3
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• pp.643-651
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• 2007

The Environmental Kuznets Curve Hypothesis postulates an inverted-U shaped relationship between GDP per capita and various pollutants. Pollutants emission increases up to a certain level as income goes up; after that, it decreases. This paper investigates the relationship between industry pollutants taking industrial sulfur dioxide omission as example, and economic growth by using province-panel data set from 1989 to 2004 in 28 provinces of P. R. China. The result shows that the EKC hypothesis may be supported in the case of industrial sulfur dioxide, and the GDP per capital of turning point is about RMB 13,548 (at 1978 price). Except Shanghai, all the provinces GDP per capital in this study are less than RMB 13,548, indicating the amount of industrial sulfur dioxide emission will be increasing in the near future. To realize sustainable development and pollutants abatement, the central and local government should adopt an integrated strategy to protect environment.

• The Journal of Information Technology and Database
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• v.4 no.2
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• pp.47-63
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• 1998

본 논문은 탬플릿을 기반으로 하는 새로운 정보시스템 개발 방법을 제시하고 있다. 이 개발 방법은 재사용을 극대화하여 개발 생산성을 향상시키고, 일관성 있는 설계 패턴을 유지하여 개념적 무결성을 유지하는데 목적을 두고 있다. 템플릿의 설계는 다양한 컴포넌트를 조립하여 구현하는 방법을 채택하였는데, 이는 객체지향의 중심 개념 중의 하나인 구성관계 개념에 기반을 둔 것이다. 템플릿을 적용하여 정보시스템의 개별 기능을 구현하는 방법은 유전관계 개념에 기반을 두고 있는데, 템플릿과 유전관계를 설정하여 속성과 연산을 유전 받은 후, 속성과 연산의 일부를 재구현하여 개발하는 방법을 채택하였다. 특히, 재구현을 감안한 연산에 대한 메소드 구현 방법을 제시하여 템플릿 설계의 난제를 해결하였다. 템플릿을 대상으로 성능 평가와 개선 방안도 제시하였다. 제시된 방법의 적용 사례 분석을 통해 실용성을 검증하고 있다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.10a
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• pp.3-7
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• 2004

There are some limitations in the analysis and evaluation for area traffic control systems. The area traffic is consist of several intersections interconnected which are very complicated and many traffic strategy are adopted for the control system. This paper features an effective area traffic control system by High Level Architecture(HLA) which is a new developed simulation tool. In this paper, we discuss the design of HLA-based area traffic control simulation. We describe technical motivations for the HLA, the key elements of the architecture and how they are minimum and essential to the goal of reuse and interoperability in simulation arena.

• Bulletin of the Korean Chemical Society
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• v.30 no.12
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• pp.2890-2894
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• 2009

The larch-fruit-like acetylferrocene micro-nanomaterials and beltlike acetylferrocene micro-nanomaterials have been cross-correspondingly prepared in bidirection by the top-down and bottom-up approach, respectively, and characterized by scanning electron microscope, transmission electron microscope and X-ray diffractometer. UV-Vis absorption spectra show that the redshift was found in the acetylferrocene micro-nanomaterials compared to that in solution. The formation mechanism of the acetylferrocene micro-nanomaterials is also proposed. This work provides a new strategy for the material synthesis and preparation and may realize the reuse of organometallic materials.

• Proceedings of the Korea Society for Simulation Conference
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• 2005.05a
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• pp.82-88
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• 2005

There are plenty of optimization models for the signal-system of a single intersection and area traffic. Some of those models are adopted for the real traffic signal control system. The simulators for a single crossroad have been developed, so that we could evaluate optimization models and traffic control systems. However, the simulators for the area traffic are still being developed. Therefore, there are some limitations in the analysis and evaluation for area traffic control systems, The area traffic is consist of several intersections interconnected which are very complicated and many traffic strategy are adopted for the control system. This paper features an effective area traffic control system by High Lever Architecture(HLA) which is a new developed simulation tool. In this paper, we discuss the design of HLA-based area traffic control simulation. We describe technical motivations for the HLA, the key elements of the architecture and how they are minimum and essential to the goal of reuse and interoperability.

• Journal of Information Technology Applications and Management
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• v.13 no.2
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• pp.115-126
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• 2006

Recently, flash memories are one of best media to support portable computer's storages in mobile computing environment. We propose a new transaction recovery scheme for a flash memory database environment which is based on a flash media file system. We improved traditional shadow paging schemes by reusing old data pages which are supposed to be invalidated in the course of writing a new data page in the flash file system environment. In order to reuse these data pages, we exploit deferred cleaning list structure in our flash memory shadow paging (FMSP) scheme. FMSP scheme removes the additional storage overhead for keeping shadow pages and minimizes the I/O performance degradation caused by data page distribution phenomena of traditional shadow paging schemes. We also propose a simulation model to show the performance of FMSP. Based on the results of the performance evaluation, we conclude that FMSP outperforms the traditional scheme.

• Journal of Korean Institute of Industrial Engineers
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• v.22 no.4
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• pp.589-605
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• 1996

Recycling of used products and components has been considered as one of promising strategies for resolving environmental problems. In this respect, most manufacturing companies begin to consider possible recycling (e.q., reuse or re-production) of the components contained in their products. The primary objective of this research is to develop a multiple criteria decision making model for systematic management of recycle-oriented manufacturing components. The production planning problem of recycle-oriented manufacturing components is first formulated as a multiobjective mixed 0-1 integer programming model with three conflicting objectives. An interactive multiple criteria decision making method is then developed for solving the mathematical model. Also, an Input/Output analysis software is developed to help practitioners apply the model to real problems without much knowledge on computers and mathematical programming. A numerical example is used in examining the validity of the proposed model and to investigate the impact of the input variables on recycling production strategy.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.1194-1197
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• 2012

디자인 패턴은 소프트웨어 설계 시 반복적으로 발생하는 문제를 해결하기 위한 방법을 기술한다. 특히, 객체지향 기술을 기반으로 하는 컴포넌트 설계 시 디자인 패턴을 활용함으로써 특정 설계 문제에 대한 해결책을 재사용할 수 있다. 좋은 객체 지향 설계는 재사용성, 확장성 및 유지보수성을 제공하는 것이며, 디자인 패턴은 좋은 설계에 필요한 구성 요소들의 관계 구조를 제시한다. 본 논문은 객체지향 기반의 컴포넌트 프레임워크 설계 시 프레임워크의 확장성과 구현 컴포넌트의 재사용성을 늘리기 위한 방안으로 디자인 패턴의 활용법을 제시한다. 특히, 알고리즘 재사용의 구조를 제시하는 전략 패턴과 처리 절차 재사용의 구조를 제시하는 템플릿 메서드 패턴의 구조를 비교하고, 분산 통신 컴포넌트 설계 시 전략 패턴의 적용 사례를 보여준다.