• Journal of the Korea Society of Computer and Information
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• v.25 no.10
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• pp.269-277
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• 2020

In this paper, we propose an efficient dynamic workload balancing strategy which improves the performance of high-performance computing system. The key idea of this dynamic workload balancing strategy is to minimize execution time of each job and to maximize the system throughput by effectively using system resource such as CPU, memory. Also, this strategy dynamically allocates job by considering demanded memory size of executing job and workload status of each node. If an overload node occurs due to allocated job, the proposed scheme migrates job, executing in overload nodes, to another free nodes and reduces the waiting time and execution time of job by balancing workload of each node. Through simulation, we show that the proposed dynamic workload balancing strategy based on CPU, memory improves the performance of high-performance computing system compared to previous strategies.

• Journal of Korean Home Economics Education Association
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• v.21 no.1
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• pp.1-19
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• 2009

The purpose of this study was to develop, implement, evaluate in-service program on the practical problem focused Home Economics program. This program is expected to contribute to the enforcement of high quality of teacher's teaching competency and to the readiness for the 2007 newly revised Home Economics curriculum. This study was carried into by followings steps: 1. Program development: Based on the program design, an in-service program of practical problem focused home economics curriculum and teaching-learning materials were developed. 2. Program implementation: The four days/30 hours in-service program was delivered in January, 2008 with 24 participants. Mentor teachers were arranged playing interface role during the program. 3. Program evaluation: Group interview was held and written evaluation was collected from participants, mentor teachers, and home economics curriculum experts. From the results of this study, it is suggested to promote understanding of theory relatively easier than delivered in the in-service program, to extend to a 60 hours program includes more activity and workshop, and to develop in-service programs for the beginner and the advanced groups separately.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.163-164
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• 2009

오늘날 기업들은 비즈니스의 가치체인(Value Chain)의 변화로 회사의 해체와 재통합 기업의 글로벌화, 비즈니스의 아웃소싱, 산업영역의 붕괴가 빈번하게 이루어지고 있는 것이 현재기업의 현실이다. 따라서 기업은 비용을 절감하고 매출을 높이며 운영자본 및 고정자산의 지출을 최소화하기 위하여 전세계 자기업의 시스템을 통합관리하려 하고 있다. 이를 충족하기 위하여 델 사는 웹 시스템을 구축하여 정보기술측면의 유연성을 확보하게 되었다. 본 논문에서는 프리웨어 프레임워크인 알바티스, 스프링프레임웍, EJB를 UML툴로 프로그램을 설계하고, JSTL, X-INTERNET로 표현함으로써 네트워크사용량, 컴포넌트개발, 프로그램배포, 오프라인작업의 가능성, 대량데이터의 처리, 웹서비스 이용, 프로그램의 설치, 유저인터페이스, 유연성, 확장성, 보안성을 측정하여 프로젝트 특성상의 적합성을 검증하려 한다.

• Journal of Digital Contents Society
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• v.12 no.1
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• pp.123-131
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• 2011

The purpose of this study is to discover if the use of computer technologies in computer-assisted language learning, in the aspect of vocabulary learning, is both effective and useful. The technique of using multimedia lessons, using the computer, offers a variety of language learning tasks in relation to the four basic language learning skills. Korean students have been accustomed to a cramming style of education, and they utilize rote memorization for learning vocabulary. This study consisted of surveys and experiments, using specific multimedia language learning courseware exercises on three different age groups. The study explores the issues and problems that followed, and how teachers could effectively apply or enhance their vocabulary teaching through computer-assisted multimedia which is suited for a variety of levels versus the classroom off-line vocabulary learning application which is suited to one level.

• Journal of the Korea Society of Computer and Information
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• v.9 no.4 s.32
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• pp.99-107
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• 2004

In a field of clothing fashion design within the country, CADs and diagraming programs are existed variously. However, Connection of producton line through the worksheet is insufficient. This research implement design and worksheet system grafted on database system. This system can be completed desige through the fashion design system and made out worksheet at the same time. Also, It is possible that designer utilize more quickly and easily find intend to use the data because this system provide retrieval function for existed data with user. A special feature of the system is easy interface(GUI) for user, support of tool for detail, utilize for stored data, printing support for off-line output, comfortable framework for record of clothes size and etc.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.23 no.4
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• pp.62-71
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• 2009

In this paper, we propose a fault diagnosis algorithm for BLDC motors by principle component analysis (PCA) and implement a real-time fault diagnosis system for BLDC motors. To verify the proposed diagnosis algorithm, various faulty data are acquired by Lab VIEW program from experimental system. We extract a fault feature using principle component analysis after preprocessing and then finally the fault diagnosis is performed by Euclidean similarity. Also, we embed the PCA algorithm and k-NN classification algorithm into a digital signal processor. From various experiments, we found that the proposed algorithm can be used as a powerful technique to classify the several fault signals acquired from BLDC motors.

• Journal of Korea Game Society
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• v.8 no.2
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• pp.69-76
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• 2008

In this paper, we present the architecture of graphics processor and its instruction format for the mobile device. In addition, we introduce tile shader data structure for the on/off-line compilation based on the OpenGL ES 2.0 and a new optimization method based on the ILP(Instruction-Level Parallelism). This paper shows where a processor with the sane core clock is being used, the shader instruction resulted from the compile structure and method in this paper is approximately 1.5 to 2 times faster than a code based on the single instruction.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.696-697
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• 2012

The usability of QRcode as a replacement of the Barcode has been increasing. As the QRcode can be saved much information than Barcode, the QRcode has various application areas. In these days we can see the quadrangular box in everywhere. In this paper we introduce an example of application areas of the QRcode, which the system save the mileage information on the Android smartphone. Our proposed system help the small markets or traditional markets which don't have enough fund to construct mileage system.

• Journal of The Korean Association For Science Education
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• v.22 no.3
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• pp.517-524
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• 2002

The secondary science teachers' professional needs and their preference for training method between off-line and on-line education were investigated. A nation-wide survey was administered to 145 science teachers from 106 secondary schools. The respondents showed high demands on all items. The prominent need was to motivate students learning science. To the contrary. their need for learning more about history and philosophy of science was the lowest. Veteran teachers and high school teachers had higher demands on designing evaluation items, but nonveteran teachers on evaluating the effectiveness of their instruction and updating their scientific knowledge. Teachers preferred the online education as a training method for most items except laboratory activities.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2015.11a
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• pp.47-50
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• 2015

PDF는 미국 어도비 시스템즈(Adobe Systems) 사에서 만든 전자 문서 파일 포맷이다. PDF에는 일반 문서 및 문자, 도형 그림, 글꼴 등을 포함할 수 있으며, 동일한 문서를 컴퓨터 운영체제와 관계없이 모니터, 프린터 등의 출력 장치로 같은 모습으로 출력하기 위한 목적으로 개발되었다. 현재 거의 모든 운영체제에서 PDF 문서를 읽거나 인쇄할 수 있으며, 온라인 및 오프라인 환경에서도 쉽게 PDF 문서를 공유할 수 있으며, 보안성이 높아 공공기관, 연구소 등에서 자료를 배포할 때 많이 사용되고 있다. XML은 사람이 쉽게 읽을 수 있고 컴퓨터와 같은 기계가 쉽게 판독할 수 있는 형식으로 부호화된 문서를 작성하기 위한 일련의 규칙을 정의하는 데 사용하는 마크업 언어로서 W3C에서 정의하였다. 현재 XML은 인터넷 상에서 데이터를 표현 하거나 교환, 저장, 검색할 때 가장 널리 쓰이고 있다. 본 논문에서는 PDF 문서를 인터넷 상에서 쉽게 활용하도록 도와주며, XML 데이터 처리가 가능한 응용 프로그램에서 PDF 문서를 활용할 때 쉽게 사용할 수 있도록 도와주는 PDF-to-XML 변환 소프트웨어를 구현하였다.