• International Journal of CAD/CAM
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• v.8 no.1
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• pp.55-62
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• 2009

Scene Transition Nets(STN) is a very useful modeling method for discrete-continuous hybrid systems. However, it is difficult to write STN in standard object-oriented programming languages because STN programming requires much skill of object-oriented programming and high knowledge of STN of designers. To overcome this problem, the authors have developed a useful GUI simulator software for modeling and simulations of STN. The experimental results of a transport system including an AGV showed the availability of our software.

• Journal of the Korea Safety Management & Science
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• v.13 no.4
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• pp.17-24
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• 2011

Logistics company strives for satisfaction of customer service. the internal clients of corporation, the engineers of driver enhance their thinking about customer orientation by education of important about customer services. the study reached the conclusion that result which analyzed the important fact of enhancing customer orientation strategy by AHP show an ability of dealing with customer improves customer orientation strategy. because the desire of customer is various, it is difficult to have standard of dealing thought, the program of improvement of dealing ability should be developed and trained to improve customer orientation.

• Journal of The Korean Association For Science Education
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• v.12 no.1
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• pp.61-73
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• 1992

In response to epoch-making development in science and technology, the innovative curricular materials have been begun to develop since the late 1950s and early 1960s. However, the new inquiry-centered materials have failed to be successfully used in teaching/learning practices of science. Among the various reasons for the failure, the very nature of the inquiry approach has been identified as the most critical problem. Nevertheless, fostering inquiry faculties on the part of the students has been emphasized as one of the most important objectives of science instruction. Therefore this study was conducted for the purpose of developing a practical inquiry-oriented instructional method. In order to obtain this goal the nature of scientific inquiry was analyzed and the status quo of science education in which inquiry-oriented instructional strategies were applied was examined. The results of the study are described in this paper.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.9 no.5
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• pp.470-474
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• 1999

We have successfully grown <111>-oriented $(La,Sr)(Al,Ta)O_{3}\;(LSAT)$ mixed-perovskite single crystals and <0001>-oriented ${Ca_{8}La_{2}(PO_{4})}_{6}O_2$ (CLPA) single crystals with the apatite structure by the Czochralski method. The compositional and lattice parameter uniformity of the crystals are discussed in relation to the growth conditions. Since LSAT and CLPA single crystals have excellent lattice matching with GaN, they are promising as new substrates for the growth of high quality GaN epitaxial layers.

• Journal of Electrical Engineering and Technology
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• v.7 no.1
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• pp.34-45
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• 2012

In the present paper, the mover speed control of a linear induction motor (LIM) using a sliding mode control design is proposed, considering the end effects. First, the indirect field-oriented control LIM is derived, considering the end effects. The sliding mode control design is then investigated to achieve speed- and flux-tracking under load thrust force disturbance. The numerical simulation results of the proposed scheme present good performances in comparison to that of the classical sliding mode control.

• The Journal of Information Technology and Database
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• v.1 no.2
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• pp.3-24
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• 1994

기존의 데이타 모델 및 설계 방법론들은 실세계의 데이타 객체에 대해 고정된 한 측면의 모델 표현만을 허용하기 때문에 여러 측면으로 관측이 가능한 실세계 객체들의 표현에 어려움을 갖는다. 제시한 객체 중심 측면 모델(OOAM : Object-Oriented Entity Aspect Model)은 실세계의 각 객체에 대해 다수의 측면 표현을 가능하게 한 객체 중심의 데이타 모델로 데이타와 지식 표현에 유용한 모델이다. 데이타베이스 시스템과 지식베이스 시스템 중 어느 하나의 시스템이 다른 시스템의 특징을 빌리거나 통합할 수 있다면 두 시스템에게 서로 이득이 될 수 있다. 이러한 KB/DB(Knowledge Base/Data Base)의 통합은 최근에 객체 지향 개념과 연역 개념에 의해 연구가 활발히 진행되고 있다. 본 논문에서는 객체의 측면 개념을 제공하는 OOAM의 기본 개념을 보여주고 OOAM에 의해 구축되는 데이타베이스 스키마의 시맨틱을 분석하고 서술하기 위해 OOAM을 형식적으로 정의하였다. 그리고 KB/DB 통합에 관련된 연구들을 분석하고 데이타베이스에 관련된 지식의 종류를 서술한 후 OOAM을 사용하여 KB/DB 통합을 위한 지식베이스와 데이타베이스의 개발 방법론을 제시하였다.

• Journal of Information Technology Applications and Management
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• v.13 no.4
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• pp.155-165
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• 2006

Along with the evolution of wireless internet environment, information services in mobile internet are being explosively increased. However, due to the high expense for the use of those services, it is not easy to collect the devoted customers. In order to overcome the adverse conditions, the service should be supported by a strategic application system which facilitates easier and fast service for customer's information needs than that of traditional on-line internet. In this paper, we investigate the strategy how to provide the information service under the customer satisfaction, and also consider some ways of personalization of information service and information provision in real-time. As a result of the works, we develop a system, MoSA-CRM(Mobile Service Application based on CRM) to support customer-oriented information service. We believe that the MoSA-CRM system can provide some benefits for information providers in mobile e-commerce market such as flexibility in business strategy, systematic customer relationship management, and growth in financial ability.

• Journal of Information Technology Services
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• v.9 no.3
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• pp.179-191
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• 2010

Service identification and composition is one of the key characteristics for a successful Service-Oriented Computing, being receiving a lot of attention from researchers in recent years. In the Service-Oriented Analysis, the identification of business services has to be preceded before application services are identified. Most approaches addressing the derivation of business services are based on heuristic methods and human experts. The manual identification of business services is highly expensive and ambiguous task, and it may result in the service design with bad quality because of errors and misconception. Although a few of approaches of automatic service identification are proposed, most of them are in focus on technical architectures and application services. In this paper, we propose a model on the automatic identification of business services by horizontal and vertical service alignment using Enterprise Architecture as an ontology. We verify the effectiveness of the proposed model of business services identification through a case study based on Department of Defense Enterprise Architecture.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2000.11a
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• pp.33-35
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• 2000

Na-K-Nb system showed a number of ferroelectric phases in bulk ceramic. [001]-axis oriented single-phase Na$_{0.5}$K$_{0.5}$NbO$_3$ (NKN) thin film have been grown on LaA1O$_3$ substrates using KrF excimer laser. X-ray diffraction $\theta$-2$\theta$ scan, rocking curves, and $\phi$ scan data evidence highly c-axis oriented along the [001] direction.ion.

• Journal of Information Processing Systems
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• v.8 no.4
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• pp.539-554
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• 2012

Model-driven and component-oriented development is increasingly being used in the development of embedded systems. When combined, both paradigms provide several advantages, such as higher reuse rates, and improved system quality. Performing model-driven and component-oriented development should be accompanied by a component model and a method that prescribes how the component model is used. This article provides an overview on the MARMOT method, which consists of an abstract component model and a methodology for the development of embedded systems. The paper describes a feasibility study that demonstrates MARMOT's capability to alleviate system design, verification, implementation, and reuse. Results indicate that model-driven and component-based development following the MARMOT method outperforms Agile development for embedded systems, leads to maintainable systems, and higher than normal reuse rates.