• Journal of Communications and Networks
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• 제5권1호
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• pp.7-18
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• 2003

In this paper, a decision feedback recurrent neural network equalizer and a modified real time recurrent learning algorithm are proposed, and an adaptive adjusting of the learning step is also brought forward. Then, a complex case is considered. A decision feedback complex recurrent neural network equalizer and a modified complex real time recurrent learning algorithm are proposed. Moreover, weights of decision feedback recurrent neural network equalizer under burst-interference conditions are analyzed, and two anti-burst-interference algorithms to prevent equalizer from out of working are presented, which are applied to both real and complex cases. The performance of the recurrent neural network equalizer is analyzed based on numerical results.

• Journal of Information Processing Systems
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• 제13권1호
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• pp.8-25
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• 2017

This survey paper explores the application of multimodal feedback in automated systems for motor learning. In this paper, we review the findings shown in recent studies in this field using rehabilitation and various motor training scenarios as context. We discuss popular feedback delivery and sensing mechanisms for motion capture and processing in terms of requirements, benefits, and limitations. The selection of modalities is presented via our having reviewed the best-practice approaches for each modality relative to motor task complexity with example implementations in recent work. We summarize the advantages and disadvantages of several approaches for integrating modalities in terms of fusion and frequency of feedback during motor tasks. Finally, we review the limitations of perceptual bandwidth and provide an evaluation of the information transfer for each modality.

• 영어어문교육
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• 제13권1호
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• pp.111-131
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• 2007

This study explores teacher's corrective feedback types in an error treatment sequence in Korean EFL classroom setting. Corrective feedback moves are coded as explicit correction, recast, or initiations to self-repair. The frequency and distribution of each corrective feedback type are examined. But the special focus was given on feedback types eliciting learner's self-repair (clarification request, metalinguistic feedback, elicitation, and repetition of error) because initiations to self-repair are believed to facilitate language learning more than other strategies. The results of the study are as follows. First, there was an overwhelming tendency for teacher to use recasts whereas initiations to self-repair were not used as much as recast (52.4% vs. 29.5%). Second, the teacher tended to select feedback types in accordance with error types: namely, recasts after phonological, lexical, and translation errors and initiations to self-repair after grammatical errors though the differences were not significant. Finally, teacher's belief and students' expectation on corrective feedback were compared with actual corrective feedback representations respectively and some mismatches were found. Though both teacher and the students acknowledged the importance and necessity of self-repair, self-repair were not put into practice as such. Therefore, this study suggests more initiations to self-repair be used for effective language learning.

• International Journal of Advanced Culture Technology
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• 제9권1호
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• pp.162-167
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• 2021

The aim of this paper is to analyze the development of effective online Problem-Based Learning (PBL) and Project-Based Learning (PjBL). The collaborative PBL/PjBL become one of the hot issues with the rapid growth of online learning in the era of COVID-19. Educators try to get innovative to continue instruction without sacrificing student engagement, thus adopting an instructional model of PBL/PjBL. The PBL process involves clarifying terms, defining complex problems, brainstorming, structuring and hypothesis while PjBL includes project-planning, implementation, communicating the results of a project in a presentation and evaluations with immediate individually tailored feedback within a predetermined period. Despite the differences between online and offline learning, the benefits of learning online or offline are practically the same if enough bidirectional interactions between instructors and students are possible. We argue that online qualifications are just the same as those of offline ones in PBL/PjBL models, therefore, the standards of online/offline learning are identical since education is a two-way communication.

• 대한지구과학교육학회지
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• 제3권3호
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• pp.198-208
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• 2010

This work describes a preliminary investigation to a learning model based on cybernetics and radical constructivism. To achieve this purpose, main ideas of cybernetics, i.e., negative feedback, difference, self-regulation, equilibrium, and purpose-directed behavior was analysed under radical constructivism. Powers' model, which consists of hierarchically arranged negative feedback systems, is introduced into this work. This was based on the claim that living organisms behave to control perceptions. By adding the notion of scheme from the view of radical constructivism, a learning procedure, which consists of six steps, was suggested in this work.

• 대한전기학회논문지:시스템및제어부문D
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• 제54권2호
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• pp.76-80
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• 2005

In this paper, a Direct Learning Control (DLC) method is proposed for linear feedback systems to improve the tracking performance when the task of the control system is repetitive. DLC can generate the desired control input directly from the previously learned control inputs corresponding to other output trajectories. It is assumed that all the desired output functions given to the system have some relations called proportionality and it is shown by mathematical analysis that DLC can be utilized to genera additional control efforts for the perfect tracking. To show the validity and tracking performance of the proposed method, some simulations are performed for the tracking control of a linear system with a PI controller.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1993년도 한국자동제어학술회의논문집(국제학술편); Seoul National University, Seoul; 20-22 Oct. 1993
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• pp.345-350
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• 1993

This paper presents an on-line feedback error learning control algorithm for a magnetic levitation system. It will be shown that even in the case of abrupt changes of the system parameters and disturbanes, the control performance is still very satisfactory.

• 한국콘텐츠학회논문지
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• 제22권8호
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• pp.444-454
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• 2022

본 연구의 목적은 의사소통 교양 수업을 수강한 공학계열 학생들을 대상으로 비대면 온라인 수업에서 학업성찰일지 작성과 피드백 활동 경험을 분석하여 그 효과에 대해 알아보고, 이러한 학습 전략이 학생들의 학습동기를 촉진시키고 수업 참여와 몰입에 유용한지를 확인하는 데 있다. 수업 효과를 알아보기 위해 학습동기에 대한 사전·사후 검사를 실시하였고, 학생들의 성찰일지와 심층면담한 내용을 질적 연구 방법 중 하나인 주제 분석 방법을 이용하여 분석하였다. 연구결과, 성찰일지와 피드백 활동이 개인의 학습 이해, 몰입, 태도 등에 유의미한 영향을 미쳤고, 학습동기 및 학습태도에도 긍정적인 영향을 미쳐 학습 효과에 의미있게 작용한 것으로 나타났다. 연구를 통해 비대면 교육 환경의 변화에 따른 적절한 학습 전략으로 학생들의 적극적인 학습태도와 긍정적인 수업 효과를 확인할 수 있었던 점에서 의의가 있다. 교육환경의 변화에 따른 다양한 교수-학습 전략들이 다방면에서 모색되고 적용되어야 할 것이다.

• 한국IT서비스학회지
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• 제6권3호
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• pp.111-128
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• 2007

The purpose of the research is to analyze the status and problems of the e-Learning quality assurance system on e-Learning contents and service provider(institutes) in the field of enterprise education. In addition, the research is to suggest the direction and strategies for revising and developing the system. The research put emphasis on two systems of the e-Learning quality assurance(contents, service provider) which directly influence financial support of government. This study depended mostly on literature review, supplemented by expert panel meetings. In the case of the quality assurance system on e-Learning contents, the followings are suggested; (1)admitting the contents made of the combination of modules in the approved module set, (2)making easier the qualifying of modified contents for maintenance, (3)revising evaluation criteria, (4)providing substantial feedback. In the field of service provider, the followings are requested; (1)differentiating of qualifying system by industry and scale of company, (2)extending the qualifying cycle, (3)improving the feedback and sharing system.

• 컴퓨터교육학회논문지
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• 제10권6호
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• pp.1-10
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• 2007

국내 외 정보(컴퓨터 과학) 교육과정에서 프로그래밍 교육이 강조되고 있으며, 초보자가 프로그래밍을 경험할 기회가 많아졌다. 초보자의 프로그래밍 학습에서 프로그래밍 에러는 학습을 어렵게 하는 중요한 원인이지만, 적절한 피드백을 제공한다면 학습에 긍정적인 영향을 줄 수 있다. 본 논문에서는 프로그래밍 에러에 따른 피드백을 통해 초보자의 프로그래밍 학습을 지원하는 시스템을 설계하였다. 교육용프로그래밍언어 두리틀을 대상으로 구현한 본 시스템은 하이라이트, 안내메시지, 객체트리, 단계실행 기능을 제공한다.