• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.671-674
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• 2002

동적 메모리 할당 방식은 사전에 그 메모리의 크기를 결정할 수 없는 경우에 효과적인 프로그래밍 기술이다. 하지만 메모리 조각화 문제와 최악의 경우 실행 시간을 예측할 수 없는 단점 때문에 실시간 시스템에는 거의 적용되지 않고 있다. 본 연구에서는 리눅스 기반의 실시간 시스템을 위한 동적 메모리 할당 알고리즘인 QB(Ouick-Buddy)를 제안한다 제안된 알고리즘은 작은 크기의 메모리 요구에 대해서 워드 크기별로 프리 리스트를 관리하고, 큰 크기의 메모리 요구에 대해서는 이진 버디 시스템을 이용하여 관리한다. 이 알고리즘에서는 작은 크기의 메모리 요구에 대해 완전-적합(exist-fit) 전략을 사용하여 메모리 이용 효율을 증가시킨다. 또한 큰 크기의 메모리 요구에 대해서 버디 시스템을 적용함으로써 외부 조각화를 제거시키고 처리량(throughput)을 증가시킨다. 제안된 알고리즘의 성능을 확인하기 위해서 제안된 알고리즘과 이진 버디 시스템(binary buddy system), 빠른-적합(quick-fit)의 메모리 이용 효율성 및 메모리 조각화 율을 비교할 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.382-384
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• 2004

소프트웨어 개발 단계 초기에 소프트웨어 제품군에 속하는 멤버들의 공통정과 차이점들을 미리 예측하고 분석하여 단위가 크고 전략적인 형태의 재사용을 가능하도록 함으로써 궁극적으로 소프트웨어 개발의 생산성을 향상시키고자 하는 것이 소프트웨어 프로덕트 라인 개발 방법론의 목적이다. 최근에는 소프트웨어 프로덕트 라인 개발에 자동 생성 프로그래밍 기법을 적용하기 위한 연구가 진행 중이다. 그런데, 어플리케이션 단위의 프로덕트 라인 개발 방법론은 단위가 너무 커서 자동 생성 기법을 효율적으로 적용하기가 힘들며, 따라서 그 초점을 컴포넌트 단위로 한정시킬 필요가 있다 본 논문에서는 도메인 공학의 주요 산물인 특성 다이어그램으로부터 특정 컴포넌트의 요구사항을 나타내는 특성 구성(Feature Configuration)을 만들고, 이를 바탕으로 컴포넌트 코드를 자동 생성하는 도구를 구현하였다. 본 논문의 컴포넌트 재구성 자동화 도구는 재사용자의 요구에 맞는 컴포넌트 소스 코드를 자동 생성함으로써 소프트웨어 프로덕트 라인 개발 생산성을 향상시킨다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2020.01a
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• pp.277-279
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• 2020

본 연구는 학생들의 효율적인 학습을 위하여 정보처리이론에 따른 소프트웨어 교육 수업 전략 설계 및 교수학습 활용 방법을 도출하는데 목적이 있다. 정보가 입력되어 인출되기까지의 정보처리과정을 적용해 소프트웨어 교육에서 프로그래밍을 보다 효과적으로 이해하고 적용할 수 있는 원리와 방법을 제시한다. 학습의 과정을 개선하고 소프트웨어 교육 정보를 보다 많이 기억하고 인출할될 수 있도록 돕는 유용한 내용들을 제공한다. 정보처리이론을 소프트웨어 교육 수업에 적용함으로써 학생들은 집중력, 문제해결능력이 향상되고 학습정보에 대해 효과적으로 기억하며 장기간 기억, 인출이 가능해 질 것을 기대한다. 교육 환경이 발전하고 학습방법도 달라지고 있지만 학습자의 인지구조가 변화되진 않을 것이다. 그러므로 발전하는 교육 환경에 맞추어 정보처리이론을 토대한 소프트웨어 교육에서 교수·학습 방법은 지속적으로 연구되어야 한다.

• Journal of Practical Engineering Education
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• v.7 no.1
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• pp.17-23
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• 2015

Growing worldwide interest in software and spread awareness of the need for education. A software-driven society realization strategy will achieve mandatory training on software. This policy will be applied from middle school students in 2015. Students who are interested in computers, like many positive responses, student learning may seem hard to have a negative reaction. Thus, the present obligation as simple in practice education only and discarded before actually lost interest awarded a systematic education does not work properly, but rather that education could happen to entirely discard turn our attention. Accordingly, what you need is to have a systematic training from the basics that I need to worry about software that can recognize easy and fun. In this paper, we propose a hardware and basic software that allows you to proceed software training more easy and efficient as it can be modified and applied to the program in the production unit to learn programming tools and programming languages.

• Journal of KIISE:Computer Systems and Theory
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• v.35 no.3
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• pp.141-149
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• 2008

Most functional programming languages allows programmers to write ambiguous rules, under the strategy that pattern-matching will be performed in a direction of 'from top to bottom' way. While providing programmers with convenience and intuitive understanding of defining default rules, such ambiguous rules may make the semantics of functional languages unclear. More specifically, it may fail to apply the equational reasoning, one of most significant advantage of functional programming, and may cause to obscure finding a formal way of translating functional languages into the ${\lambda}$-calculus; as a result, we only get an ad hoc translation. In this paper, we associate with separability of term rewriting systems, holding purely-declarative property, pattern-matching semantics of lazy functional languages. Separability can serve a formalism for translating lazy functional languages into the ${\lambda}$-calculus.

• Journal of Digital Convergence
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• v.10 no.11
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• pp.613-618
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• 2012

ICT education guidelines revised in 2005 reinforce computer science elements such as algorithm, data structure, and programming covering all schools. And Ministry of Education emphasizes STEAM education. Most important is that "How instruct them". This means necessity of contents. So this paper suggests learning method of Stack and Queue using LEGO MINDSTORMS NXT. The main purpose is that how stack and queue are used, when robot explore realistic maze. Teaching and learning strategies are algorithm, flowchart, and NXT-G programming. Simple maze has path in left or right, but complex maze has three-way intersection. These are developed by authors. Master robot explores maze and push stack, and then return to entrance using stack. Master robot explores maze and transmits path to slave's queue. And then slave robot drives without exploration. Students can naturally learn principles and applications of them. Through these studies, it can improves ability of logical and creative thinking. Furthermore it can apply to ICT and STEAM education.

• Journal of The Korean Association of Information Education
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• v.14 no.3
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• pp.311-318
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• 2010

In this paper, we proposed the integrated education program of informatics and math for solving problem using EPL. We applied a integrated math curriculum with EPL and analyzed mathematical thinking and attitude to the 3rd and 5th students. We used mathematical thinking test, mathematical attitude test and interview through student review. We also analyzed data of observers who are elementary school teachers. The results of test are as follows; First, we found effective points of meta-cognition and visualization of thought in solving the mathematical problem using Scratch. Second, mathematical thinking and attitude showed the result that 3rd grade students are more increased than 5th grade students in pre and post t-test of the mathematical. Consequently, we expect that the integrated education program of informatics and math using EPL can be applied to solve problem in math effectively.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.777-782
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• 2020

As the demand for the talented with computing thinking and programming skills increases the importance of coding education is increasing. Although various coding instructor training programs have been implemented nationwide, little research has been conducted analyzing the current status and contents of coding instructor training programs. Therefore, this thesis presents the design, development process and managing strategies of the 'Coding Instructor Training Courses for 4C Talent Development'. The training program consists of introductory courses and practical coding courses. In the introductory courses, learners acquires the basic knowledge required of coding instructors, and then proceeds to the practical courses to systematically learn the pedagogical knowledge and skills required to educate learners from kindergarten through high school. The case study introduced in this paper is expected to provide useful information to the educators planning and managing the coding instructor training program in the future.

• Journal of Practical Engineering Education
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• v.9 no.2
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• pp.107-117
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• 2017

here are many cases that take a software education as a required course for non-major students in university curriculums. However, non-major students are experiencing various difficulties in the process of learning programming languages, and there is also the opposite opinion in terms of their effectiveness. In this study, we developed a design based software education model (DBSEM) and curriculum to solve these problems and applied it to undergraduate non-undergraduate students for the last 8 years. In the proposed method, we provide a specialized educational tool such as 'block-based programming tool', but developed 'core module' and 'concept learning module' for computational thinking and applied 'prototype design module' and coding strategy based on it. As a result, non-major undergraduates could easily learn block-based scripting tools and acquire core concepts of computational thinking.

• Development and Reproduction
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• v.12 no.2
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• pp.117-124
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• 2008

The efficient strategies to cope with unpredictable and/or harmful environmental changes have been developed by every organism in order to ensure its survival and continuity of it's own species. As a results, all living things on earth maintain dynamically internal stability via a process termed 'homeostasis' among physiological parameters despite of external environment changes. Stress is an emotional and physical response to threat homeostasis. Stress may have not only transient but rather permanent effect on the organism; recent evidence clearly show that prenatal stress could organize or imprint permanently physiological systems without any change in genetic codes, a process known as 'epigenetic programming'. In this review, a series of reproduction-associated events occurred in prenatally stressed male rats such as alteration in the structure of sexually dimorphic brain regions, modification of neurotransmitter metabolism, changes in reproductive endocrine status, and finally, disorders of sexual behavior will be introduced. The fetal brain is highly sensitive to prenatal programming and glucocorticoids in particular have powerful brain-programming properties. The chronic hyperactivation of fetal brain by maternal stress-induced glucocorticoid input will provide new program via increasing the neuroplasticities. This 'increased neuroplasticities' will be the basis for the 'increased phenotypic plasticities' rendering the organism's better adaptation to environmental challenges. In conclusion, organism who experienced 'harsh' environment in his fetal life seems to give up a certain portion of reproductive competence to make good chance of survival in his future life by epigenetic (re)programming.