• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.347-350
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• 2012

컴퓨터 프로그래밍 교육은 컴퓨터과학 분야의 관련 전공과목을 공부하기 위하여 매우 중요할 뿐만 아니라, 학생들의 취업을 위한 기술 교육에서도 매우 중요하다. 이 논문에서는 학생들의 교육 및 취업에 적합한 교육용 및 상용 프로그래밍 언어, 도구에 대한 타당성을 분석하여 프로그래밍 교육에 적합한 프로그래밍 언어/도구를 선택하고, 이에 대한 교육 과정을 개발하여 프로그래밍 현장 교육에 적용하고 분석한다. 특히, 최근의 기술 추세와 산업계에 필요한 임베디드/모바일/웹/3D 프로그래밍 분야에 널리 사용되고 있는 프로그래밍 분야에서 텍스트 기반 언어(예: JAVA)와 시각 프로그래밍 언어/환경(예: LabVIEW)에 대한 유용성을 비교하여 분석한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37C no.10
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• pp.940-948
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• 2012

Android program is developed with JAVA SDK and executed over virtual machine. For this reason, programming is easier than traditional C language but performance of operating speed decreases. To enhance the performance, NDK development tool, which provides C language, assembly language environment, was proposed. Furthermore, with NEON function provided by ARM, we can utilize the vector operation and enhance performance. In the paper, we explore effectiveness of NDK and then propose advanced multiplication structure with NEON function.

• Journal of Korea Society of Digital Industry and Information Management
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• v.4 no.3
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• pp.1-8
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• 2008

Recently, a great many people are concerned about promoting their health because medical science and scientific technology has become much larger and more develop. Thus, the person who interested in health wants to confirm his condition whatever he may take a meal or exercise. But it is disappointed of our expectation. By reason that many people doesn't know what changes will occur in their body. In this paper, we are going to introduce our Health Care Managing System which could display a physical variation, in addition, we will also propose how to control serial data from wireless sensors. We implemented this system using ZigbeX and Java application.

• Journal of KIISE:Computer Systems and Theory
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• v.26 no.1
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• pp.24-32
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• 1999

네트워크 컴퓨터를 이용하여 병렬 프로그래밍 환경을 개발하려는 많은 연구가 진행되었다. 그러나 기존의 연구들에서는 응용 프로그램들이 호환되지 않고 이기종 컴퓨터사이에서 시스템이 이식되지 않는등 여러 가지 문제가 지적되고 있다. 이러한 이식성과 호환성의 문제를 해결하기 위하여 JPVM과 같은 연구도 진행되었디만, JPVM 은 병렬 환경을 위한 충분한 기능과, 견고한 메시지 통신, 편리한 사용자 인터페이스 등이 제대로 지원되고 있지 않다. 본 논문에서는 기존의 문제들을 해결하고 사용자에게 더욱 편리한 병렬 프로그래밍 환경을 제공하기 위한 JPE를 소개한다. JPE는 자바를 이용하여 호환성과 이식성의문제를 해결하였으며, 견고한 메시지 통신, 웹 기반의 그래픽 콘솔을 제공하여 인터넷상에서도 더욱 쉽게 사용할수 있도록 구현하였다.

• KIPS Transactions on Software and Data Engineering
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• v.4 no.5
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• pp.209-218
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• 2015

BPEL is used in various domains since it can describe the flow of works according to conditions and rules, and it can call web services in service-oriented computing environments. However, new functions that are not provided by BPEL grammar are required in specific domains. Generally, when new functions are required, the domain-specific language should be newly defined and developed, which requires high development cost. In this regard, a new function needs to be defined and added instead of developing domain-specific language with the new functions added. However, such methods only allow an addition of a single function, and it is difficult to design and add new functions according to the needs. This paper defines XAS4B document, which extends the BPEL grammar function through XML schema in order to add new functions, and proposes BPEL engine generator that generates BPEL engine with the new functions added by processing the document. The XAS4B document enables the creation of a new grammar added to BPEL using XML schema. It also shows the process of adding new functions to BPEL engine using AspectJ, JAVA implementation of aspect-oriented programming. The proposed system can add new functions using AspectJ without modifying BPEL engine. This allows the provision of new functions at low cost in various domains.

• Journal of KIISE:Software and Applications
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• v.30 no.1_2
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• pp.58-72
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• 2003

The objects generated by the keyword new in Java are automatically managed by the garbage collector Inside Java Virtual Machine (JVM) not like using the keywords free or delete in C or C++ programming environments. This provides a means of freedom of memory management burden to the application programmers. The garbage collector however. inherently has its own run time execution overhead. Thus it causes the performance degradation of JVM significantly. In order to mitigate the execution burden of a garbage collector, we propose a novel way of dynamic memory management scheme in Java environment. In the proposed method, the application programmers can explicitly manage the objects In a simple way, which in consequence the run-time overhead can be reduced while the garbage collector is under processing. In order to accomplish this, Java application firstly calls the APIs that arc implemented by native Jana, and then calls the subroutines depending on the JVM, which in turn support to keep the portability characteristic Java has. In this way, we can not only sustain the stability in execution environments. but also improve performance of garbage collector by simply calling the APIs. Our simulation study show that the proposed scheme improves the execution time of the garbage collector from 10.07 percent to 52.24 percent working on Mark-and-Sweep algorithm.

• Korean Journal of Cognitive Science
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• v.11 no.2
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• pp.19-35
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• 2000

Learning by examples has proven to be an efficient method in mastering various subjects including programming languages. This study hypothesizes that the number of examples and the type of examples are two significant dimensions that influence the performance of learning programming languages by examples. A set of experiments was conducted to investigate the impacts of the two dimensions in the domain of JAVA programming. The results showed that providing two examples is more effective than providing only one example even though significantly more explanations are attached to the single example. Among the 'two-example' groups, the group that was given functionally similar examples performed better than those with functionally dissimilar examples. Explanations for these results are provided in this paper based on the behavioral patterns of individual subjects in terms of time and frequency. This paper concludes with the implications of the study results for the development of effective tutoring systems for programming languages.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.5
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• pp.1028-1034
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• 2004

As use of internet generalized laying stress on WWW(World Wide Web) service of multimedia based recently, we could acquire many informations that exist to all over the world's computer network. It is risen to important problem that use of internet acquires correct information rapidly on modem society which is generalized. This paper designed internet search engine and understand structure of that drawing URL which is optimized, and secure embodiment technology using OOPL(Object-Oriented Programming Language). Also, compare with existent domestic manufacture search engines and system that propose showed that the bad link rate is improved in this paper.

• Journal of the Korea Society of Computer and Information
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• v.21 no.7
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• pp.93-100
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• 2016

This paper shows what kind of influence the learning motivation factors have on the effectiveness of Flipped Learning Model through the case of operating a JAVA programming subject. The Flipped Learning Approach consisting of Before Class, Before or At Start of Class, and In Class provides the students with learning motivation as well as satisfies Keller's ARCS(Attention, Relevance, Confidence, Satisfaction) to keep them studying steadily. This research conducts the operation of Flipped Learning and gets Exploratory Factor Analysis and Reliability Analysis from the result of the course experience questionnaire at the end of the class. Given this survey result, Flipped Learning approach improves the learners' satisfaction in class and the effectiveness in the fields of understanding learning context more than does the previous lecture-based learning approach by pacing learning procedure and conducting self-directed learning.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.343-346
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• 2012

학생들이 프로그래밍 교육에서 학습에 어려움을 겪고 있는 객체지향 프로그램 개발 능력을 향상시킬 수 있는 교육방법으로서 이 논문에서는 시각 프로그래밍 교육 방법론과 교과과정을 도입한다. 3D 프로그래밍 환경을 제공하여 게임 형태의 프로그램을 객체지향 프로그래밍 방식으로 쉽게 작성할 수 있는 Alice 언어를 정규 교과과정에 도입하여 학생들의 프로그래밍 언어에 대한 이해도의 향상과 프로그래밍에 대한 학습 의욕을 고취하여 능력 있는 프로그래머의 양성에 기여할 수 있을 것으로 기대된다. 시각 프로그래밍 교육 방법의 도입에 대한 성과를 분석하기 위하여 프로그래밍 교육의 유용성을 분석할 수 있는 평가 지표를 제시하고 학생들의 프로그래밍 학습 효과를 분석한다.