• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 추계학술대회논문집A
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• pp.49-54
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• 2001

Measurement of welding residual stresses is one of important tasks to assess the structural integrity of welded structures. For operating components, especially, nondestructive techniques are required. By now, authors have proposed a new residual stress evaluation method, the bead flush method, where residual stresses are calculated from eigenstrain distribution determined by surface removal of reinforcement. In this paper, a brief description of the bead flush method is given and its utility and problem to be overcome are discussed. And also stabilization method of solution set of eigenstrain in inverse analysis is proposed.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2003년도 춘계공동학술대회
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• pp.1035-1041
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• 2003

Recent studies among various activities taking place in order-picking warehouse system have shown various researches to reduce the order-picking costs occupying more than half the total costs. One way of improving the warehouse system performance is to separate from a picking area and a reserve area in one unit rack. This study is concerned on the performance evaluation model for picking and replenishing facility of refrigerated warehouse using simulation method. In this study, we developed a mathematical model to compute the system performance solve this problem using simulation method. We demonstrate the system performance using AutoMod Simulator and verify the results to compare mathematical results of the system performance of warehouse system. A systematic approach proposed n this study for an optimal planning of order-picking warehouse is known as an effective method for planning of order-picking warehouse and a performance evaluation problem considering both picking and replenishment.

• 대한수학교육학회지:학교수학
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• 제13권3호
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• pp.469-484
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• 2011

본 연구는 수학 학습의 정의적 영역에서 메타-정의의 개념을 구체화하고 명확히 하기 위해 메타-정의의 유형을 구분하고, 실제 사례를 보여주었다. 메타-정의는 정의의 모니터링, 감정의 평가, 감정의 조절, 정의의 활용 4가지로 구분되었고, 모니터링 후 평가, 조절, 활용이 시간적 순서로 이루어지는 것을 볼 수 있었다. 감정을 평가하고 조절하는 데 수학과 수학 학습에 대한 신념이 중요한 잣대로 작용하였으며, 메타-정의는 정의를 조절하고 학습 전략을 선정하는 등 수학 학습에서 중요한 역할을 하였다.

• 한국생산제조학회지
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• 제8권6호
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• pp.50-54
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• 1999

In the process of designing a wheel balancer an ergonomic evaluation model has shown that manual tire handling onthe machine was often the major problem, The root of the problem lay in the design of machine's shaft which is influenced by the opeative handling task. Several methods were reviewed for determining the correct shaft' sizes but the Revised NIOSH Equation and the Lifting Stress Calculator were found to be the only suitable models for this study. An application of these mathematical models has shoed that the shaft length and the shaft height were the most critical measurement By analyzing these conclusion s the correct shaft size parameters became clearly defined.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.597-602
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• 2008

Most of structural analyses are concerned with the deformation and stress in a body subjected to external loads. In many fields, however, the interpretation of inverse problems is needed to determine surface tractions or internal stresses. In this study, the inverse processes by using the finite elements and the boundary elements are formulated for the evaluation of internal residual stresses from displacements measured on a remote surface. Small errors in the measured displacements often result in a substantial loss of accuracy of an inverse system. We use the Tikhonov regularization techniques to regularize the ill-conditioned system. Advantages and disadvantages are discussed through numerical examples.

• 농촌계획
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• 제10권1호
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• pp.1-7
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• 2004

There are recently many studies on evaluating the economic value of multi-functionality of rural areas. However, the regional difference of economic value leads a problem of different evaluation on its economic value for each region in its application to government policy. This problem causes an increase in cost because it creates restriction in policy decisions which put their importance on the time of their execution. This study investigates the propriety of value transfer using Meta Analysis after evaluating the social and cultural value of rural areas among their functions based on CVM model. It finds that the regional difference in the willingness to pay is 0.13% to 31.42%.

• 대한간호학회지
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• 제43권1호
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• pp.133-142
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• 2013

Purpose: The purpose of this study was to evaluate the effects of the Family Resilience Enhancement Program (FREP) on family hardiness, family sense of coherence, family problem solving communication, family crisis oriented personal evaluation, and adaptation in families of patients with chronic schizophrenia. Methods: The study design was a nonequivalent control group prepost test design. Study participants were 17 families in the experimental group and 17 in the control group. Ten sessions of FREP were provided over 5 weeks. The data were analyzed using SPSS 15.0. Results: There were statistically significant differences in family hardiness, family sense of coherence, family problem-solving communication, family crisis-oriented personal evaluation, social resources, and family adaptation between the experimental group and the control group. Conclusion: FREP based on the family resilience model developed in this study, shows the effect of leading the families to positive family adaptation.

• 한국산업정보학회논문지
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• 제4권2호
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• pp.7-13
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• 1999

본 연구에서는 주어진 입출력 데이터에 신뢰도를 나타내는 소속함수 값이 붙여진 경우에 대하여 유효한 퍼지 신경망을 제안한다. 먼저, 퍼지수 연결강도와 퍼지수 임계치를 가진 퍼지 신경망의 구조를 나타낸다. 코스트 함수는 퍼지 신경망으로부터의 출력치와 소속함수 값을 가진 목표 출력치를 이용하여 정의되고, 퍼지 신경망의 학습 알고리즘은 정의된 코스트 함수로부터 도출된다. 마지막으로 도출된 학습 알고리즘을 이용하여 사출성형 품질의 목측 평가치 해석에 적용하고 그 유효성을 나타낸다.

• Structural Engineering and Mechanics
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• 제51권5호
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• pp.707-725
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• 2014

In order to improve the crane-hook's performance and service life, we formulate a multi-criteria shape design problem considering practical conditions. The structural weight, the displacement at specified points and the induced matrix norm of stiffness matrix are adopted as the evaluation items to be minimized. The heights and widths of cross-section are chosen as the design variables. The design variables are expressed in terms of shape functions based on the Gaussian function. For this multi-objective optimization problem with three items, we utilize a multi-objective evolutionary algorithm, that is, the multi-objective Particle Swarm Optimization (MOPSO). As a common feature of obtained solutions, the side views are tapered shapes similar to those of actual crane-hook designs. The evaluation item values of the obtained designs demonstrate importance of the present optimization as well as the feasibility of the proposed optimal design approach.

• 한국안전학회지
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• 제17권4호
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• pp.119-125
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• 2002

The concept of dwelling space is tend to be changed not only to have reasonable mobility but also to have high quality of indoor air with psychologicaa satisfaction and comfortable. Moreover, recent constructed buildings have a big problem because of exhausted pollution gas and particles from building materials. More serious problem occurs from its high air tightness reducing the ventilation for saving the energy and superior adiabatic insulators to have high heat efficiency. Indoor air quality in super high-rise dwelling house was investigated by measuring pollutants such as $CO_2,=;CO,\;MO_2,\;R_n,\;TSP,\;PM_{10}$, HCHO, Offensive ordor. Subjective evaluation of residential environment is processed for the inhabitants who live in research space by testing environmental load in accordance with environment morphology, exterior environmental factor and post occupancy correlation and influence of attention.