• Journal of applied mathematics & informatics
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• 제18권1_2호
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• pp.1-23
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• 2005

The decentralized static output feedback design problem is considered. A constrained trust region method is developed that solves this optimal control problem when a complete set of state variables is not available. The considered problem is interpreted as a non-linear (non-convex) constrained matrix optimization problem. Then, a decentralized constrained trust region method is developed for this problem class exploiting the diagonal structure of the problem and using inexact computations. Finally, numerical results are given for the proposed method.

• 한국비블리아학회지
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• 제28권4호
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• pp.321-340
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• 2017

본 연구는 국내 문헌정보학 수업에서 문제중심학습(Problem-Based Learning) 모형을 활용할 수 있는 수업 모형을 설계하였으며, 실제 강의실 현장에서 적용한 뒤 학생들이 느끼는 교육적 효과를 분석하였다. 본 연구는 기존 연구 분석을 통하여 문제해결 방안 초안을 작성하였다. 전문가의 자문을 통해 시나리오 수정하는 단계를 거쳤다. 문제는 분석단계활동(요구분석, PBL 수업적합성 판단, 내용분석, 학습자분석, 환경분석, PBL 운영환경 결정, PBL 수업형태 결정)과 설계단계활동(문제상황설계, 학습자원설계, 문제해결과정촉진설계, 운영전략설계, 평가설계, PBL 운영환경설계)을 통해 도출되었다. 초기 설정된 시나리오를 바탕으로 1차 문제상황 수업을 진행한 뒤 학습자들의 성찰일지를 통해 문제중심학습의 결과를 일차적으로 분석하였다. 학습자들의 성찰일지를 통해 연구자는 첫번째 PBL 문제상황에서 비판적 사고력과 창의력이 증진되었음을 확인할 수 있었으며, 원활한 의사소통과 협력의 방법이 고안/활용되었음을 알 수 있었다. 첫 번째 문제 상황 수업 후 교육 효과를 분석하고 수정사항을 수렴한 연구 결과는 교과설계의 2차 수정 및 보완에 활용할 예정이다. 본 연구는 PBL 모델 개발 사례를 소개하여 향후 후속 수업적용과 연구를 기대하게 한다.

• Journal of the Korean Statistical Society
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• 제30권1호
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• pp.163-178
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• 2001

We consider the experimental design problem of selecting values of design variables x for observation of a response y that depends on x and on model parameters $\theta$. The form of the dependence may be quite general, including all linear and nonlinear modeling situations. The goal of the design selection is to efficiently estimate functions of $\theta$. Three new criteria for selecting design points x are presented. The criteria generalized the usual Bayesian optimal design criteria to situations n which the prior distribution for $\theta$ amy be uncertain. We assume that there are several possible prior distributions,. The new criteria are applied to the nonlinear problem of designing to estimate the turning point of a quadratic equation. We give both analytic and computational results illustrating the robustness of the optimal designs based on the new criteria.

• 한국CDE학회논문집
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• 제10권5호
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• pp.365-374
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• 2005

Most of people who are engaged in research and development find it difficult to solve the engineering problems creatively due to the lack of ideas. TRIZ is one of the emerging problem solving techniques that leads us to a very useful and clear solution. TRIZ consists of several tools such as ideal final result (IFR), physical and technical contradictions, 40 invention principles, resource, effect, etc. However, many designers think that TRIZ is hard to be applied to a design problem since there are several tools in TRIZ. Machine designers may want to see which tool is more effective than others. Thus, this paper provides sample solutions of a design problem: holder design for the bottle etching machine by applying several TRIZ tools. Difficulties in applying TRIZ to a design problem are discussed.

• Communications for Statistical Applications and Methods
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• 제4권1호
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• pp.129-138
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• 1997

In this paper, the problem for choosing design points in the two dimensional case is condidered. In the one dimensional case, given the design density function, we can choose design points using the quantile function. However, in the two dimensional case, there is no clear definition of the percentile. Therefore, the idea of choosing design points in the univariate case can not be applied directly to the two dimensional case. We convert this problem into an optimization problem using the Voronoi diagram.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2004년도 춘계 학술발표대회 논문집
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• pp.160-161
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• 2004

• 공학교육연구
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• 제24권2호
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• pp.68-75
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• 2021

ABEEK recommends convergent engineering projects to nurture creative problem-solving ability for 1st year engineering students through 'Creative Engineering Design' course. However, 1st year engineering students, who have not yet studied core subjects in engineering, have difficulties understanding and coping with the challenges posed by the engineering-related projects. For this reason, the educational objectives of this course are usually frustrating to achieve by the instructor. In this paper, by using the problem-solving process and skills of critico(-creative) thinking, we prepare guidelines for creative engineering design education that allow 1st-year students to effectively participate in engineering projects without a complete understanding of the design process which is to be studied. Also, we present a case study that applies the guidelines to an on-going creative engineering design course and discusses the outcomes by showing student-generated works. The results showed that the intuitive content and everyday expression of critico(-creative) thinking education enabled the instructor to effectively guide their students through the requirements of engineering projects without relying on advanced engineering design methods, and that the application of these guidelines also helped improve students' communication skills, including presentation. We show that the guidelines for creative engineering design education utilizing the problem-solving process and skills of critico(-creative) thinking is not only contributing to achieving the educational objectives of the creative engineering design course but can also be an educational paradigm that incorporates critico(-creative) thinking education into engineering education.

• 한국가정과교육학회지
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• 제31권2호
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• pp.155-175
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• 2019

본 연구는 실천적 문제 중심 수업을 설계할 때 보다 구체적이고 체계적으로 수업을 설계하는데 활용하고자 하는 목적으로 백워드 설계 모형에 기초하여 개발되었다. 연구의 목적을 달성하기 위해 본 연구에서는 분석, 설계, 개발, 평가의 단계를 거쳐 연구를 진행하였다. 분석 단계에서는 실과 실천적 문제 중심 수업설계 모형의 개발을 위한 이론적 기초가 되는 실천적 문제 중심 교육과정에 대한 문헌 고찰, 수업설계 모형에 대한 문헌 고찰, 2015 개정 실과 교육과정의 분석 등이 이루어졌다. 설계 단계에서는 분석단계의 문헌 고찰을 통해 실과 실천적 문제 중심 수업설계 모형의 단계와 하위요소 등의 내용을 선정하고, 템플릿을 구안하였다. 개발 단계에서는 설계 단계에서 디자인한 내용을 바탕으로 실과 실천적 문제 중심 수업설계 모형의 초안을 개발하였다. 평가단계에서는 개발한 실과 실천적 문제 중심 수업설계 모형의 초안에 대하여 전문가 집단의 검증을 통해 모형을 수정·보완하고, 최종적으로 실과 실천적 문제 중심 수업설계 모형을 완성하였다. 연구 결과, 실과 실천적 문제 중심 수업설계 모형은 '목표 설정하기, 평가 계획하기, 학습활동 계획하기'의 3단계로 구성된 모형의 초안에서 전문가 검증을 거쳐 '실천적 문제 설정하기, 목표 설정하기, 평가 계획하기, 학습활동 계획하기'의 4단계로 최종적으로 모형을 수정·보완하였다. 실과 실천적 문제 중심 수업설계 모형은 전문가 검증을 통해 교사들이 실천적 문제 중심으로 수업을 설계하고자 할 때 구체적인 가이드라인이 될 수 있는 체계적인 템플릿이라고 평가하였다.

• 한국실내디자인학회논문집
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• 제16권2호
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• pp.63-70
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• 2007

Analogy in problem solving is similarity-based reasoning facilitated by verbal and visual operation. This similarity-based reasoning generally supports initial phase of idea search. Therefore, this study intends to infer the types of problem solving by tracing the analogy use of verbal and visual representation through a experimental research. According to the result of this research, the types of problem solving by analogy are classified into 'evolving', 'divergent', and 'poor conversion' type. Firstly, 'evolving type' is distinguished between 'combination type' associated different contents to develope a new design and 'transformation type' associated similar words and sketches to be continuously revised and developed. In these types usually structural analogy rather than surface analogy is used. Secondly, in 'divergent type' associated words or sketches are individually represented, and among them one design solution is selected. In this type usually surface analogy is used. Thirdly, in 'poor conversion type' interaction between verbal representation and visual representation does not go on smoothly, and the generation of idea is poor. In here surface analogy is mostly used. These findings could form the basis of skill development of idea generation and conversion in design education.

• International Journal of Internet, Broadcasting and Communication
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• 제11권3호
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• pp.49-58
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• 2019

Efficient evidential reasoning is an important issue in the development of advanced knowledge based systems. Efficiency is closely related to the design of problems solving methods adopted in the system. The explicit modeling of problem-solving structures is suggested for efficient and effective reasoning. It is pointed out that the problem-solving method framework is often too coarse-grained and too abstract to specify the detailed design and implementation of a reasoning system. Therefore, as a key step in developing a new reasoning scheme based on properties of the problem, the problem-solving method framework is expanded by introducing finer grained problem-solving primitives and defining an overall control structure in terms of these primitives. Once the individual components of the control structure are defined in terms of problem solving primitives, the overall control algorithm for the reasoning system can be represented in terms of a finite state diagram.