• 한국정보교육학회:학술대회논문집
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• 2005.08a
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• pp.13-20
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• 2005

본 논문에서는 on-line을 통한 교육방법의 하나인 e-learning(Web Based Instruction)을 활용한 음악과 수업모형을 개발하여 교육적 활용 효과를 검증하였다. 웹 기반 교수학습 자료를 구축하고 각종 학습 자료를 탑재하여 수업에 활용하였으며, 교육 효과를 보다 정확히 알아보기 위해 수준별(상,중,하) 3개 그룹으로 나누어 e-learning 기법을 적용 사전평가 및 사후평가를 통하여 얻어진 결과를 통계 처리하여 검증하였다. 본 논문에서는 학습자의 능력과 필요에 따라 능동적인 학습이 이루어지도록 하였다. 개별학습, 반복학습 및 자기주도적 학습을 진행할 수 있도록 구성하였으며, 그 결과 구체적이고 실질적인 학습 효과를 얻을 수 있었다. e-learning 활용수업을 실시한 실험 집단 전체에서 off-line 수업을 실시한 통제집단보다 학습 성취도에 있어서 효과적인 것을 확인할 수 있었다. 상위, 중위 그룹의 학생들에게는 웹 기반 교수학습 활용수업이 학습효과에 있어서 큰 차이가 없었지만 하위 그룹의 학생들에게는 크게 효과적인 것으로 나타났다.

• The Journal of Korean Association of Computer Education
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• v.19 no.1
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• pp.101-109
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• 2016

Designing algorithms is a very important learning process in computational thinking education because it requires learner's logical and procedural thinking. But the case studies that have topics of algorithms learning and students' types of errors in learning algorithms are not enough. So the purpose of this study is to analyze students' errors that discovered in the process of learning three control structures of programming using flowchart and provide types of errors in designing algorithms. Results about tests of three types of control structures in university student's algorithms learning class showed different cases of types of errors; types of sequential control error are not presented in the class, types of conditional control error are presented in the case of setting the conditions of nested conditional control, and types of iterative control are showed in the many cases of iterative conditions, statements of single and nested iterative control structure. The results of study will be a good case study about teaching designing algorithms of computational thinking education in elementary, secondary school and university.

• Communications of Mathematical Education
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• v.20 no.2 s.26
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• pp.295-326
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• 2006

Despite the importance of mathematics education, many students in high school have lost their interests and felt difficulties and they don't have 'mathematical' experience with meanings attached because of the entrance examination. This paper attempted to resolve these problems and find the teaching-method with which students can study by themselves with more confidence. Nowadays students' use of Internet is very popular. After develop 'the development of mathematical power' program based on mathematics history, history, science, the application of problems in real world, and self-evaluation, I made students repeat them after making teaching lessons in classroom as moving pictures. Through this processes, I attempted to develop the Self-Directed Learning' ability by making public education substantial. First of all I analyzed the actual conditions on 'Self-Directed Learning' ability in mathematics subject, the conditions of seeing and hearing in Internet learning program, and students' and their parents' interests in Internet education. By analyzing the records, I observed the significance of the introducing mathematics history in mathematics subject in early stager, cooperative-learning, leveled-learning, self-directed learning, and Internet learning. Actually in aspect of applying 'the development of mathematical power' program, at first I made up the educational conditions to fix the program, collected the teaching materials, established the system of teaching-learning model, developed materials for the learning applying Internet mail and instruments of classroom, and carried out instruction to establish and practice mathematics learning plan. Then I applied the teaching-learning model of leveled cooperation and presentation loaming and at the same time constructed and used the leveled learning materials of complementary, average, and advanced process and instructed to watch teaching moving pictures through Internet mail and in the classroom. After that I observed how effective this program was through the interest arid attitude toward mathematics subject, learning accomplishment, and the change of self-directed learning. Finally, I wrote the conclusion and suggestion on the preparation of conditions fur the students' voluntary participation in mathematics learning and the project and application on 'the development of mathematical power' program and repeated learning with the materials of moving pictures in classroom.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.1921-1922
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• 2006

청소 로봇의 장애물 판단은 청소 로봇이 정확하고 빠르게 장애물을 파악하여 정밀한 제어를 수행하며 청소 효율을 향상 시키는데 중요하다. 청소 로봇이 장애물을 판단하는데 여러 가지 알고리즘이 있지만 신경망 알고리즘 특히, BP(Back-Propagation) 알고리즘을 적용하여 장애물 인식에 있어 반복학습 시키면 청소 로봇은 보다 빠르고 정착하게 장애물을 스스로 판단 할 수 있다. 본 논문에서는 청소 로봇에 부착된 초음파 센서와 장애물과의 거리데이터를 얻어, 이를 BP 알고리즘에 적용하는 것을 연구하며 학습률, 반복학습, 최대 제곱 오차값를 조정한 실험결과로 특성변화를 관찰하고 해석하여 검증한다.

• The KIPS Transactions:PartB
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• v.10B no.1
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• pp.67-72
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• 2003

In this paper, we study the enhancement of VQ (Vector Quantization) design for text dependent speaker recognition. In a concrete way, we present the non-Iterative method which makes a vector quantization codebook and this method Is nut Iterative learning so that the computational complexity is epochally reduced. The proposed semi-noniterative VQ design method contrasts with the existing design method which uses the iterative learning algorithm for every training speaker. The characteristics of a semi-noniterative VQ design is as follows. First, the proposed method performs the iterative learning only for the reference speaker, but the existing method performs the iterative learning for every speaker. Second, the quantization region of the non-reference speaker is equivalent for a quantization region of the reference speaker. And the quantization point of the non-reference speaker is the optimal point for the statistical distribution of the non-reference speaker In the numerical experiment, we use the 12th met-cepstrum feature vectors of 20 speakers and compare it with the existing method, changing the codebook size from 2 to 32. The recognition rate of the proposed method is 100% for suitable codebook size and adequate training data. It is equal to the recognition rate of the existing method. Therefore the proposed semi-noniterative VQ design method is, reducing computational complexity and maintaining the recognition rate, new alternative proposal.

• Communications of Mathematical Education
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• v.13 no.2
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• pp.515-525
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• 2002

중학교 기하영역 중 피타고라스의 정리를 논증적인 증명 대신에 역동적인 방법으로 이해할 수 있도록 GSP(Geometer's Skechpad)를 활용하여 구현했으며, 멀티미디어 환경에 익숙한 중학생들에게 시 ${\cdot}$ 공간을 초월하여 웹 상에서 개별학습, 반복학습을 할 수 있도록 JAVA 언어를 사용하여 웹으로 변환시켰다.

• Proceedings of the Korean Information Science Society Conference
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• 2000.04b
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• pp.696-698
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• 2000

본 연구는 발성장애아동을 대상으로 시각적 효과를 이용하여 발성치료 및 교육을 위한 도구 개발을 목적으로 한다. 따라서 특수아동의 발성장애에 대한 특성을 고려하여 그에 적합한 반복학습이 가능하도록 설계하였다. 또한 GUI와 게임적 요소를 가미하여 발성에 대한 아동의 흥미유발과 자발적 학습이 가능하도록 하였다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2013.04a
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• pp.793-794
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• 2013

• Journal of the Korean Institute of Intelligent Systems
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• v.14 no.6
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• pp.693-698
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• 2004

In this paper, an iterative learning control method is applied to suppress a vibration of a 2-mass system which has a flexible coupling between a load and a motor. More specifically, conditions for the load speed without vibration are derived based on the steady-state condition. And the desired motor position trajectory is synthesized based on the relation between the load and motor speed. Finally, a PD-type iterative learning control law is applied for the desired motor position trajectory. Since the learning law applied for the desired trajectory guarantees the perfect tracking performance, the resulting load speed shows no vibration even when there exist model uncertainties. A modification to the learning law is also Presented to suppress undesired effects of an initial position error, The simulation results show the effectiveness of the proposed learning method.

• Journal of Digital Contents Society
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• v.7 no.1
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• pp.59-65
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• 2006

The development of web service area enables to integrate the various existing systems into web, which have been utilized to the several fields such as education business and companies. The e-learning could be an important teaching method for English education in that the learners prefer to use of the visual material in language learning. The students are provided with the motivation of learning for it is interesting to them. The purpose of this study is to research the problems so that web service can be organized efficiently for the education of English. In addition, this paper is to suggest an alternation of the direction for development of skills to solve the existing problems.