• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.183-185
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• 2012

본 연구의 목적은 지속적인 영재학생 관리를 위해 학생 관리 시스템의 구축 방향을 제시함으로써 영재교육 수혜 경험에 대한 정보들의 누적이 학생들의 진로 진학이나 자아실현을 하기까지 도움을 제공할 수 있도록 하는 것이다. 이를 위하여 학생 관리시스템 구축에 대한 선행 연구를 분석하였으며 분석 결과 효율적인 교육과정 운영을 중심으로 학생의 인적 사항을 관리하거나 그 기관 내에서 학생을 재 선발하고, 학부모와 상담, 영재교육에 대한 연구 자료로 활용하는 데 그치고 있었다. 따라서 본 연구에서는 학생 관리 시스템의 구축 방향으로 전국 영재교육기관에 공통적으로 적용 관리할 수 있는 중앙 센터의 마련, 영재교육기관 간의 시스템 연계, 학생 중심의 시스템 구축을 통한 자아실현 및 진로 진학에 도움 제공, 인성 측면을 반영할 수 있는 시스템 구축, 구체적인 진로 상담 작성이 가능한 항목 마련, 교육과정 반영, 영재교육 보조교사나 전담교사 파견을 통한 철저한 학생 관리를 제시하였다.

• Proceedings of the Korea Database Society Conference
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• 1998.09a
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• pp.448-474
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• 1998

Data warehouse (DW) is important for analytical processing. Metadata is a key to its architecture. This paper proposes an architecture that consists of seven components. To illustrate data warehouse environment (DWE), this Paper proposes taxonomies having four flows. on the basis or the taxonomies and metadata, this paper proposes a methodology for building the data warehouse and metadata simultaneously. This integrated development methodology (IDM) consists of seven phases: (i) preparatory phase, (ii) requirement analysis phase, (iii) data warehouse development phase, (iv) operational data store development phase, (v) data mart development phase, (vi) metastore development phase, and (vii) maintenance phase. A metastore system is Proposed to help develop metadata interactively. An illustrative example is investigated to demonstrate the usefulness of IDM.

• Proceedings of the Korea Database Society Conference
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• 1999.10a
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• pp.165-171
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• 1999

형상관리는 프로젝트를 추진함에 있어 현실적으로 필수적인 관리 항목으로 인식할 필요성이 대두되고 있다. 그 이유는 프로젝트를 성공적으로 완료하기 위해서는 전체 프로젝트 공정을 통해 사전에 계획된 절차에 준하여 단계별로 어떻게 추진되고 있는지 추진과정을 추적, 확인되어야 하며, 또한 추진 결과에 있어 단계별로 어떤 결과물이 양산되고 있는지를 검증 및 확인하여야 하기 때문이다. 본 논문에서는 이러한 형상관리를 위해서는 프로젝트 수행 초기에 형상관리 계획을 입안하기 위한 형상관리 조직형태를 제안하며 작성된 계획서에 수록된 형상관리 조직을 운영함에 있어 필요한 형상관리활동의 주요 내용들에 대해 국내외 표준 및 지침에 대해 조사하였으며, 현실적으로 공공 프로젝트를 추진함에 있어 형상관리를 위한 필수관리 항목과 문서화 기준 및 이들 문서들간의 연관성에 대해 연구, 제안한다.

• IE interfaces
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• v.20 no.2
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• pp.162-176
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• 2007

As facing the rapid advance of information technologies, the postal service is required to have capabilities of real-time logistics characterized by collaboration, ubiquity and intelligence which are necessary to the organizational management. In this study we discuss the design of the next generation information system based on real-time enterprise strategy to achieve real-time integrity and upgrade of postal information system. After briefly addressing the issues on developing information system and current situation, we provide the design direction and the framework of the to-be system. We develop detailed specification of each subsystem and provide an operational scenario. We believe when this framework is put into use, it can contribute to competitive performance by giving the integrity and consistency in implementing information systems of the Korea Postal Service.

• Journal of Power Electronics
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• v.15 no.4
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• pp.876-885
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• 2015

High frequency alternating current (HFAC) has been widely used in a wide range of power distribution systems (PDS) due to its superior performance. A high frequency AC/DC converter plays the role of converting HFAC voltage to DC voltage. In this paper, a new LCL-T resonant AC/DC converter has been proposed, and an easier control method based on input voltage comparison is presented, without the complicated calculation of the zero-crossing point. Both a low distortion and near-to-unity power factor can be achieved by the proposed resonant converter and control strategy. The operational principle and steady-state analysis are given for the proposed resonant converter. A simulation model and experimental prototype are implemented with an operation frequency of 25kHz and a rated power of 20W. The simulation and experimental results verify the accuracy of the analysis and the excellent performance of the proposed topology.

• Proceedings of the KSRS Conference
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• 2002.10a
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• pp.89-94
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• 2002

Recently, DARI implemented the receiving and processing system for MODIS sensor data from NASA EOS satellites (TERRA and AQUA). This paper shows the development strategy considered, system requirement derived, system design, characteristic and test results of processing system. System operation concept and sample image are also provided. Implemented system was proven to be fully operational through lots of pass operations activities from RF signal reception to level-1 processing.

• Journal of the military operations research society of Korea
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• v.27 no.2
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• pp.1-24
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• 2001

As the weapon systems of the 21st century are becoming more and more performance /technoloriven, it is only becoming more expensive to obtain the weapon systems. Therefore, it is absolutely vital for every nation to find a way to reduce cost objectives. As CAIV is a strategy that entails setting aggressive, yet realistic cost objectives when defining operational requirements and acquiring defense systems and managing achievement of these objectives, we believe that it is essential for us to find out what it is and how we can adopt it so that we can provide ourselves with highly capable systems that are affordable. Therefore, In this paper we will give a brief overview of CAIV that is one of the main acquisition strategies adopted by DoD of U.S. including some case studies of CAIV. Furthermore, the paper will analyze stated cost objectives in our country and suggest realistic opportunities for cost reduction.

• Korean Journal of Remote Sensing
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• v.19 no.1
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• pp.37-42
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• 2003

Recently, KARI implemented the receiving and processing system for MODIS sensor data from NASA EOS satellites (TERRA and AQUA). This paper shows the development strategy considered, system requirement derived, system design, characteristic and test results of processing system. System operation concept and sample image are also provided. Implemented system was proven to be fully operational through lots of pass operations activities from RF signal reception to level-1 processing.

• Journal of Energy Engineering
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• v.28 no.1
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• pp.30-36
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• 2019

The military has developed and operated a variety of military vehicles. Among them, medium tactical vehicles are developed as vehicles suitable for transporting troops, replacing existing military trucks, which have a significant impact on infantry forces' combat capability. Applying technology to increase fuel efficiency to these critical weapons systems, medium tactical vehicles, increases the distance range, which can reduce effective operational performance and oil costs. In this study, a measure was taken to improve the distance range of Medium Tactical Vehicles by applying an oil temperature control strategy to increase fuel efficiency.

• Smart Structures and Systems
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• v.26 no.6
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• pp.703-720
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• 2020

This paper investigates the safety of the wind turbine blade against excessive deformation. For this purpose, the performance of the blade in the along-wind direction is improved by longitudinal stiffener made of shape memory alloy. The rationale behind the selection of this smart material is due to its ability to offer excellent thermo-mechanical behaviour at low strain. Here, Liang-Roger model is adopted for vibration control, and the super-elastic effects are utilised for blade stiffening. Turbulent wind fields are generated at the hub height using TurbSim and the corresponding loads are evaluated using blade element momentum theory. An efficient switching algorithm is developed along with performance curves that enable the designer to select an optimal mode of heating depending upon the operational scenario. Numerical results presented in this paper clearly demonstrate the performance envelope of the proposed stiffener and its influence on the reliability of the blade.