• Proceedings of the KSR Conference
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• 2002.10a
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• pp.522-527
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• 2002

This paper proposes 40 [KVA] rated SW(Static Inverter) system for Light Rail Transit. The SIV provide power of a fluorescent light in the car, Air-conditioner, and other equipments. To control output voltage it is used voltage control loop for constant voltage control and simultaneously used current control loop for instantaneous control at load changing. The performance of SW system will be verified by experimental results.

• Proceedings of the KAIS Fall Conference
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• 2010.05a
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• pp.385-388
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• 2010

USN은 최소한의 에너지를 소모하면서 최대한의 데이터를 전송하고 또한 가능한 한 높은 신뢰도의 데이터를 전송하기 위해 노력한다. 이렇듯 요구사항이 많은 환경에서의 USN 기술은 지금 이 시간에도 다양한 분야에서 활발하게 연구되고 있다. 본 연구에서는 USN 소프트웨어의 품질을 평가하기 위해 품질을 시험하여 측정하고 그 결과를 적절한 기준에 따라 판정하는 방법에 대해 연구를 수행하고자 한다.

• 한국IT서비스학회:학술대회논문집
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• 2006.05a
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• pp.71-77
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• 2006

1984년 폰노이만이 최초로 메로리에 저장된 프로그램을 이용하는 현대식 컴퓨터인 IBM SSEC를 발명한 이후, 거의 50여 년 동안 소프트웨어를 만드는 기술은 끊임없이 변화해 왔다. 최근 대두되고 있는 MDD/MDA 기술은 모델 및 코드 간의 자동변환을 통한 소프트웨어 개발생산성을 향상 시키기 위한 기술이다. 본 논문에서는 CBD 방법론으로 수행된 SI 프로젝트에서 MDD/MDA 기술 적용으로 인한 생산성 향상 효과를 기능점수 (Function Point) 관점에서 분석하여 제시한다. 또한 본 사례의 프로젝트에서 적용한 MDD/MDA적용 방법을 소개한다.

• Journal of Drive and Control
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• v.21 no.2
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• pp.82-85
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• 2024

• Journal of the Korean Wood Science and Technology
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• v.45 no.6
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• pp.753-761
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• 2017

The heartwood (HW) of Japanese cedar (Cryptomeria japonica) has usually a reddish color. But some trees have black-colored heartwood (BHW). BHW of Japanese cedar has a low commercial value because of the appearance. Therefore, in this study, a comparative analysis was conducted to evaluate the differences in the physical, mechanical, and inorganic element properties, and decay resistance of red-colored heartwood tree (RHW) and BHW. The physical properties showed significant difference between sapwood (SW) and HW, but there was no significant difference between RHW and BHW. From the results of mechanical properties, no significant difference was recognized in SW of RHW, HW of RHW, SW of BHW, and HW of BHW. There were decay resistance differences between RHW and BHW in HW, and between HW and SW in both RHW and BHW, respectively. The magnesium (Mg), potassium (K), and calcium (Ca) contents had significant differences between SW and HW in both RHW and BHW. In this present study, the decay resistances and the contents of Mg and K were higher in HW than in SW both for RHW and BHW, while these measurements were lower in RHW than in BHW. Therefore, BHW was considered to be worthy as a high-quality material as RHW.

• Journal of The Korean Association of Information Education
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• v.21 no.2
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• pp.259-266
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• 2017

The goal of this study is to introduce the SW Edu-thon program designed to strengthen pre-service teachers' software teaching competencies and to report its outcomes. In order to achieve the goal, we have conducted a survey for twenty-two teams of two pre-service teachers who have participated in the regional pre-contest and selected for the best lesson plans. The survey consists of several sections including the level of SW competencies, learning motivations, educational outcomes, satisfaction toward the lecturers, mentors, educational programs, and management and operations. In addition, we have analyzed the mentors' progression reports written by the participating in-service teachers who have helped the pre-service teachers to develop and implement their SW lesson plans. The results of this study provide with the outcomes of the program and the future directions for operating the SW Edu-thon program.

• The Journal of Korean Association of Computer Education
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• v.21 no.5
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• pp.37-48
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• 2018

The 2015 revised national curriculum includes SW courses to improve computational thinking, and a variety of physical computing tools for learning are on sale for use in education. The purpose of this study is to provide a basis for selecting physical computing tool for learning suitable for learning situations and learning purposes, and to provide a reasonable basis for judging the choice of tools in the field. Delphi survey method was used as a reference method for developing evaluation criteria through 25 expert panels. As a result, the criterion of evaluation of the learning tool composed of 40 essential and 11 selection criteria for 7 domains was presented. In addition, the evaluation results of five kinds of learning tools commercialized through the evaluation criteria of the learning tool were analyzed. The evaluation criteria for the learning tools developed through this study are expected to help teachers select rational learning tools and help learning tool developers develop learning tools.

• The Journal of Korean Association of Computer Education
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• v.22 no.5
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• pp.39-50
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• 2019

In this study, we developed the selection criterion of physical computing teaching aids for middle school SW education. Literature analysis, Delphi survey, and AHP methods were applied to develop the selection criterion. First, seven characteristics for physical computing teaching aids have been set up by the literature analysis. The contents are suitability for curriculum, safety, durability, economy, general availability, attractiveness, and ease of management. Based on these characteristics, the Delphi method is used in developing 31 criteria in 7 areas for the selection of physical computing teaching aids. Next, the AHP method was applied to identify the relative importance between 7 areas and between 31 detailed criteria. And then the final criterion for the selection of physical computing teaching aids was developed by calculating scores for detailed criteria.

• Journal of Practical Engineering Education
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• v.14 no.3
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• pp.491-498
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• 2022

In this paper, as a liberal arts course for non-major students, a case study of recurrent neural network SW practice, which is essential for designing a basic recurrent neural network subject curriculum, was developed. The developed SW practice case focused on understanding the operation principle of the recurrent neural network, and used a spreadsheet to check the entire visualized operation process. The developed recurrent neural network practice case consisted of creating supervised text completion training data, implementing the input layer, hidden layer, state layer (context node), and output layer in sequence, and testing the performance of the recurrent neural network on text data. The recurrent neural network practice case developed in this paper automatically completes words with various numbers of characters. Using the proposed recurrent neural network practice case, it is possible to create an artificial intelligence SW practice case that automatically completes by expanding the maximum number of characters constituting Korean or English words in various ways. Therefore, it can be said that the utilization of this case of basic practice of recurrent neural network is high.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.8
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• pp.651-662
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• 2013

In this study, we suggest the selecting evaluation method considering 6 major factors like Compliance system application (Development language conformance, Platform Compliance), threat evaluation (criticality of security incident, possibility of security incident), application benefit (Reliability / quality improvement, Modify Cost) for appropriate secure coding rule selecting evaluation. Using this method, we selected and make a set consist of 197 secure coding rules for Battlefield Management System Software. And calculated the application priority for each rules.