• Proceedings of the Korea Crystallographic Association Conference
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• 2007.11a
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• pp.9-9
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• 2007

• Proceedings of the Korean Magnestics Society Conference
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• 2008.12a
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• pp.249.1-249.1
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• 2008

• ETRI Journal
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• v.42 no.4
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• pp.527-533
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• 2020

High-level synthesis (HLS), which automatically synthesizes a register-transfer level (RTL) circuit from a behavioral description written in a high-level programming language such as C/C++, is becoming a more popular technique for improving design productivity. In general, HLS tools often generate a circuit with a larger area than those of hand-designed ones. One reason for this issue is that HLS tools often generate multiple instances of the same module from a function. To eliminate such a redundancy in circuit area in HLS, HLS tools are capable of sharing modules. Function-level module sharing at a behavioral description written in a high-level programming language may promote function reuse to increase effectiveness and reduce circuit area. In this paper, we present two HLS techniques for module sharing at the function level.

• Korean Journal of Mathematics
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• v.20 no.1
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• pp.33-46
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• 2012

Using the direct method, we prove the Hyers-Ulam stability of the orthogonally additive-quartic functional equation (0.1) $f(2x+y)+f(2x-y)=4f(x+y)+4f(x-y)+10f(x)+14f(-x)-3f(y)-3f(-y)$ for all $x$, $y$ with $x{\perp}y$, in non-Archimedean Banach spaces. Here ${\perp}$ is the orthogonality in the sense of R$\ddot{a}$tz.

• East Asian mathematical journal
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• v.31 no.5
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• pp.743-751
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• 2015

In this paper, we consider a discrete ratio-dependent predator-prey system with harvesting effect. In order to investigate dynamical behaviors of this system, first we find out all fixed points of the system and then classify their stabilities by using their Jacobian matrices and local stability method. Next, we display some numerical examples to substantiate theoretical results and finally, we show numerically, by means of a bifurcation diagram, that various dynamical behaviors including cycles, periodic doubling bifurcation and chaotic bands can be existed.

• Journal of the Korean Chemical Society
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• v.52 no.2
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• pp.169-178
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• 2008

This study investigated the relationship between science high school teachers' beliefs of gifted education and classroom practices. The data of this case study were collected from three science teachers who worked in a science high school through qualitative research methods such as interviews and classroom observations. The other various data related to science high school management and the teachers' teaching were collected and analyzed using the constant comparative method. The results of the study are as follows: the teacher of long period in-service experience in science high school had teacher-centered belief, and his classroom practices were matched with his beliefs. The teacher of short period in-service experience in science high school had student-centered belief, and her classroom practices were matched with her beliefs, also. The teacher of medium period in-service experience in science high school had student-centered belief, but her teacher-centered classroom practices were mismatched with her beliefs. From the results, it could conclude that school culture affects on teachers' classroom practices stronger than beliefs. The longer career period of science high school changed easier teachers' beliefs into knowledge education for university entrance examination removed from gifted education. To solve these problems, we suggest the needs of teacher education programs for science high school teachers.

• Journal of The Korean Association For Science Education
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• v.18 no.3
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• pp.383-398
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• 1998

This study was accomplished to analysis and survey on the experimental and practical science education of high school in korea for the consecutive study of the an analysis and survey on the experimental and practical science education of middle school in korea(Lee, Yoon-Jong et aI., 1997). The status of facilities, management for the experiment, practices, teaching methods in high schools have been investigated. The present status and reasonable management of the high school science education have been grasped from the questionaires. To do this 165 high school science teachers, 1977 students and 80 principals of high schools in Korea are administered questionaires of Science Education Research Institute of Kyungpook National University(I997). The results of this study are as follows : The reasonable management for experiments and practices of science education were scanty in the high school around the urban and rural school owing to the shortage of facilities and equipments, crowded class, excessive class works for teacher, excessive contents of present textbooks and insufficiency of the administrative supports etc. The current teaching method of high school science has emphasized knowledge. This fact does not satisfy the objective of learning due to lack of the teaching method. Desirable directions for the improvement of present status of high school science education were proposed in this paper.

• Proceedings of the Korea Contents Association Conference
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• 2011.05a
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• pp.5-6
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• 2011

사용자 중심의 감성공학으로 다변화 되어가는 유비쿼터스환경에서 디자인 요소와 결합시키는 상호작용이 요구되고 있으며 많은 연구가 진행되어 왔다. IT융합기술을 이용하여 감성 디자인을 제공하는 것은 제품 서비스 전략의 중요한 요소이다. 본 논문에서는 정보 필터링을 이용한 감성공학적 자동차 디자인 지원 방법론을 제안하였다. 제안된 방법은 사용자에게 자신의 감성에 부합하는 자동차 디자인을 제공함으로써 이를 얻기 위한 시간과 비용을 줄여주고, 손쉽게 원하는 디자인 스타일에 접근하도록 한다. 현실의 상황을 활용하고 정보 필터링으로 디자인을 추천함으로써 사용자에게 지능화된 개인화 서비스를 제공할 수 있다. 이를 사용자 인터페이스로 구축하여 논리적 타당성과 유효성을 검증하기 위해 실험적인 적용을 시도하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.536-539
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• 2014

본 논문에서는 생명체 간의 상호작용으로 형성된 안정된 생태계의 요인을 분석할 수 있는 계산 시뮬레이션 모델을 제안한다. 그리고, 실제 시뮬레이션 프로그램을 개발하고 이를 통해 얻은 실험 결과를 제시함으로써, 계산 시뮬레이션 분야와 생명과학 분야의 융합 가능성을 보인다. 제시한 계산 시뮬레이션 모델은 1) 하나의 커다란 생태계로 이루어진 세계, 2) 다수의 작은 생태계로 이루어진 세계, 3) 생태계가 미형성된 세계를 유전 알고리즘을 사용하여 모델링 하였으며, 실험 결과는 2)번 모델이 생태계를 가장 안정적인 상태로 오래 유지하는 결과를 보였다. 이를 통해서 충분한 에너지가 존재하거나 공급되는 환경에서는 생물 밀도가 높으면서 에너지 순환이 빠른, 작은 규모의 생태계가 가장 안정적이라는 생물학적인 결론을 도출할 수 있었다.

• Journal of Engineering Education Research
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• v.13 no.5
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• pp.55-60
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• 2010

Chemistry laboratory class was produced for senior high school freshmen with the cooperation of university staffs, high school teachers and the university students. Although the students who will take the lab class are senior high school freshmen, we decided to prepare four experiments that are simple and have highly visible reactions or transformation. That is, 1) Water purification, 2) Surface modification, 3) Briggs-Rauscher reaction, and 4) Polymer synthesis and characterization. After the safety guideline and experiment instructions by the faculty staffs, two teaching assistants (TAs) supervised each experiment. Since taking a direct part in it will provide stronger impact than only being one who is just watching the experiment, all experiments contained some process that the high school students must handle the reagents, tools or the equipment, by themselves. Although, the operation performed by the students was limited to a series of simple actions, the various unique phenomena presented by the experiments impressed the students. The lab class was fruitful not only for high school students, but also good for university students. The lab class provided good opportunity for them to improve the abilities to teach and guide someone.