• 한국수학교육학회지시리즈D:수학교육연구
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• 제15권2호
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• pp.159-179
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• 2011

This paper reports on the learning journeys in mathematical problem solving of 21 teachers enrolled on a Masters of Education course entitled Discrete Mathematics and Problem Solving. It draws from the reports written by these teachers on their personal journeys: the commonalities and differences among them in terms of how they look at their own problem solving experiences, what language they employ in talking about problem solving, and what impact the course has on their views about problem solving. One particular aspect of problem solving instruction, a pedagogical innovation called the Practical Worksheet, is addressed in some detail. These graduate students are full-time mathematics teachers with at least two years of classroom experience. They include primary and secondary teachers.

• 벤처창업연구
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• 제17권3호
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• pp.269-280
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• 2022

대학교육에서는 창의적인 인재육성과 진로 개척 차원에서 창업교육에 관한 필요성이 강조되고 있다. 이에 본 연구에서는 창업교육을 이론교육과 실습교육으로 구분하여 대학생의 진로성숙도에 어떠한 영향을 미치는지 연구하였다. 그리고 새로운 변화에 적응하고 극복하기 위한 핵심역량으로 문제해결력 능력 매개 효과에 관해서 연구하였다. 본 연구는 대학생 153명을 대상으로 Smart PLS를 활용하여 실증분석을 진행하였다. 분석 결과 첫째, 창업이론교육과 창업실습교육은 문제해결능력에 유의미한 긍정의 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 창업이론교육은 진로성숙도에 긍정의 정(+)의 영향을 미치는 것으로 나타났으나, 창업실습교육은 진로성숙도에 직접적인 유의미한 영향을 미치지 않은 것으로 나타났다. 셋째, 문제해결능력은 진로성숙도에 긍정의 정(+)의 영향을 미치는 것으로 나타났다. 마지막으로 문제해결능력은 대학생들의 창업교육(이론, 실습)과 진로성숙도 사이에서 매개 효과가 있음을 밝혔다. 본 연구결과는 창업이론 및 실습교육이 문제해결능력에 미치는 직접 효과, 창업이론 교육이 진로성숙도에 미치는 직접 효과를 도출하였지만, 창업실습은 진로성숙도에 미치는 직접 효과는 없다. 반면 창업실습-문제해결-진로성숙도의 간접효과를 판단해 볼 때 매개 효과가 있는 것으로 밝혀져, 창업 실습교육은 창업 이론교육과 달리 그 자체로서는 진로성숙도에 유의미한 영향을 끼치지는 못하였다. 그러므로 대학의 창업 실습교육에 대한 개선이 필요하며, 진로성숙도에 영향을 미치기 위해서는 반드시 문제해결능력을 함양할 수 있도록 교육 설계가 필요하다는 시사점을 도출하였다.

• 대한기계학회논문집A
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• 제31권3호
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• pp.355-364
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• 2007

Multidisciplinary design optimization based on independent subspaces (MDOIS) is a simple and practical method that can be applied to the practical engineering MDO problems. However, the current version of MDOIS does not handle the common design variables. A new version of MDOIS is proposed and named as MDOIS/2006. It is a two-level MDO method while the original MDOIS is a single-level method. At first, system analysis is performed to solve the coupling in the analysis. If the termination criteria are not satisfied, each discipline solves its own design problem. Each discipline in the lower level solves the problem with common design variables while they are constrained by equality constraints. In the upper level, the common design variables of related disciplines are determined by using the optimum sensitivity of the objective function. To validate MDOIS/2006, mathematical problem and NASA test bed problem are solved. The results are compared with those from other MDO methods. Finally, MDOIS/2006 is applied to flow patterner design and shows that it can be successfully applied to the practical engineering MDO problem.

• 반도체디스플레이기술학회지
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• 제16권4호
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• pp.25-29
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• 2017

In this paper, we have studied the deformation problem of the scaffold caused by the FDM type 3D printer. The Practical TRIZ technique was used to solve the deformation problem of the scaffold generated from the adhesion surface between the scaffold and the bed. The Practical TRIZ methodology was used to derive the solution and the experiment was conducted on the derived solution. As a result of evaluating the experimental results obtained for the solution, it was found that the deformation of the scaffold was much improved to the satisfactory level.

• East Asian mathematical journal
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• 제33권1호
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• pp.23-36
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• 2017

We study an optimization problem for HARA utility function under a multi-scale Heston's stochastic volatility model. We investigate a practical strategy that do not depend on the incorporated factor which is unobservable in the market.

• Human Ecology Research
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• 제59권4호
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• pp.433-448
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• 2021

The purpose of this study was to analyze two subject competencies (practical problem-solving capability and independent life capability) reflected in the activity tasks included in the 'home life and safety' area of 12 middle school technology-home economics textbooks in accordance with the 2015 revised curriculum. The analysis criteria were sub-elements of two subject competencies. Seven sub-elements were derived from each competency. Frequency analysis was performed to determine how often the sub-elements were reflected in the activity tasks. The results were as follows. First, with regard to the sub-elements of 'practical problem-solving capability', 'value judgment' was reflected most frequently in the activity tasks followed by 'exemplification of solution', 'logical thinking', 'critical thinking', 'decision-making', 'practical reasoning', and 'evaluation of solutions'. Secondly, the sub-elements of 'independent life capability' were unevenly distributed in the activity tasks. The 'capability to perform conscious living' was reflected most frequently followed by 'development and self-identity', 'time, money, and leisure management', and 'reasonable consumption and resource utilization'. For teachers wanting to teach activity-oriented classes and student participatory classes, the results pinpoint the materials necessary to develop learners' subject competencies by using textbooks from different publishing companies.

• 대한수학회지
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• 제51권1호
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• pp.99-111
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• 2014

In this paper, we deal with the problem of practical observer design and the practical stabilization for a class of perturbed impulsive systems. We show that, under the classical conditions of uniform complete controllability and uniform complete observability of the nominal system without impulsive effects, it is possible to design an observer controller for a class of perturbed linear impulsive system when the origin is not an equilibrium point.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.1216-1222
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• 2005

A shortage of construction field workers has been a serious problem, both in the developed and in the developing countries. As a solution for conquering this problem, these countries import foreign laborers from nearby less-developed countries. While this contributes to lessening the labor deficiency, foreign workers are relatively inefficient in productivity and are often exposed to the cross-cultural risks due to cultural differences, communication difficulties, different work ethics and customs, etc. Despite these facts, construction firms do not well address these issues and are lagged in establishing an appropriate management strategy against it. This paper presents a practical management plan for foreign construction workers through Focus Group Interviews (FGI) and survey investigation. On this basis, this study examines the level of awareness and important managerial aspects of the issue of foreign laborers. Finally, it suggests a cross-cultural and ready-to-use practical human resource management plan for facilitating the foreign worker's productivity.

• 경영과학
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• 제25권1호
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• pp.1-9
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• 2008

This paper investigates the R&D project portfolio selection problem. Despite its importance and impact on real world projects, there exist few practical techniques that help construct an non-dominated portfolio for a decision makers satisfaction. One of the difficulties constructing the portfolio is that such project portfolio problem is, in nature, a multi-attribute decision-making problem, which is an NP-hard class problem. This paper investigates the R&D project portfolio selection problem. Despite its importance and impact on real world projects, there exist few practical techniques that help construct an non-dominated portfolio for a decision makers satisfaction. One of the difficulties constructing the portfolio is that such project portfolio problem is, in nature, a multi-attribute decision-making problem, which is an NP-hard class problem. In order to obtain the non-dominated portfolio that a decision maker or a user is satisfied with, we devise a user-interface algorithm, in that the user provides the maximum/minimum input values for each project attribute. Then the system searches the non-dominated portfolio that satisfies all the given constraints if such a portfolio exists. The process that the user adjusts the maximum/minimum values on the basis of the portfolio found continues repeatedly until the user is optimally satisfied with. We illustrate the algorithm proposed, and the computational results show the efficacy of our procedure.

• 한국수학교육학회지시리즈C:초등수학교육
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• 제25권4호
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• pp.297-312
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• 2022

문장제는 학습자에게 다양한 문제해결의 경험을 제공하고 수학적 지식을 맥락에 적용할 수 있도록 안내하여 학습자의 수학 학습을 더욱 의미 있게 이끌 수 있다. 본 연구는 초등 수학 교과서의 문장제를 실제적 맥락 관점에서 살펴봄으로써 교과서 집필 및 교수 학습 과정에 대한 시사점을 제공하고자 하였다. 이를 위하여 초등 수학 교과서 내 수와 연산 영역의 문장제를 살펴보았으며 구체적인 대안을 모색하기 위하여 미국과 핀란드의 초등 수학 교과서를 참고하였다. 분석 결과, 초등 수학 교과서의 문장제에 부자연스러운 맥락이나 소재를 설정하는 경우, 인위적인 수를 삽입하거나 문장제의 언어적 표현 및 삽화가 명료하지 않게 제시되는 경우 등이 나타났다. 이러한 경우 학습자가 문장제의 맥락을 실생활과 별개의 것으로 인식하거나 문장제에서 요구하는 내용을 이해하여 문제를 해결하기 어려울 수 있다. 추후 교과서 집필 시 학습자를 고려하여 소재를 설정하고 삽화, 도식 등을 적극적으로 활용하며 문장 및 삽화를 더 명료하게 구성하는 등 실제적 맥락을 고려하여 다양한 형태의 문장제를 구성할 필요가 있다.