• 한국시뮬레이션학회논문지
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• 제14권3호
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• pp.43-54
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• 2005

For the effective design of automated distribution center composed of Automated Storage/Retrieval System, Automated Guided Vehicle System, and Conveyor System, we proposed an analysis method to determining. design and control parameters with multiple performance objectives using Compromise Programming, which can resolve the dilemma of conflicting objectives. The Evolution Strategy generates the optimal solutions for each objectives. The Analytic Hierarchy Process selects the best solution among the alternatives generated from Evolution Strategy. The Regression Analysis formulates the objective functions for each objectives. By reducing deviations between goal values and target values generated from Analytic Hierarchy Process, Compromise Programming determines design and control parameters by compromising the multiple objectives formulated using Regression Analysis. When the parameters of system are changed, this proposed analysis method has a benefit of reducing costs and time without repeating whole simulation run.

• 대한가정학회지
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• 제36권7호
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• pp.97-110
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• 1998

The purpose of this study was to examine the use and purchase patterns, design and satisfaction degree, and desired performance of boardsailing suits. The subjects were 266 boardsailing athletes and lovers. The results were as follows; (1) The demand of boardsailing suits for spring and autumn was larger than that for the other seasons. (2) The order of influencing power in purchasing boardsailing suits was fitness, textile material, design, color, cost, and brand. (3) Preference of design was one piece style and preference of pattern was character pattern. Additionally, the study on Korean patterns was demanded for international games like Olympics. (4) The order of satisfaction degree of currently used boardsailing suits was activity, size, design, material, sewing, color, pattern, and ease of wearing and taking off. (5) For the performance of boardsailing suits materials, the estimated values of absorbency, water repellency, dye fastness, biological resistance, weight, handle, air permeability, durability, and elasticity were much lower than the importance values.

• 한국실내디자인학회논문집
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• 제8호
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• pp.39-43
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• 1996

Based on individual characteristics and values, human preference on interior finishing material is various . Finishing materials, however, do not seem to satisfy those characteristics and values. Given the aspects of life style and population classes, finishing materials are an important part of human life and draw much attention . As a result, there is a necessity to study them systematically. This study related finishing materials to tenants, understands the characteristics both of them, and identifies in terrelations between them in order to find out satisfaction and preference which teants have towards their finishing materials. As a result, this study is about design materials preference of tenants in apartment houses for the purpose of improving quality of finishing materials. A practical study method of questionnaire research was used to find out tenant's opinions on components of interior space.

• 대한기계학회논문집A
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• 제28권4호
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• pp.475-480
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• 2004

Function approximation is one of the most important and active research fields in design optimization. Accurate function approximations can reduce the repetitive computational effort fur system analysis. So this study presents an enhanced two-point diagonal quadratic approximation method. The proposed method is based on the Two-point Diagonal Quadratic Approximation method. But unlike TDQA, the suggested method has two quadratic terms, the diagonal term and the correction term. Therefore this method overcomes the disadvantage of TDQA when the derivatives of two design points are same signed values. And in the proposed method, both the approximate function and derivative values at two design points are equal to the exact counterparts whether the signs of derivatives at two design points are the same or not. Several numerical examples are presented to show the merits of the proposed method compared to the other forms used in the literature.

• Design & Manufacturing
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• 제17권1호
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• pp.64-69
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• 2023

This paper explores the impact of gate shape changes on the size and density of foamed cells in microcellular foam injection molding. Five different gate shapes were examined while varying the amount of nitrogen gas(N2) injected for foaming. Analysis of the results showed that while average values did not change significantly, deviation values decreased by approximately 65% for cell size and 56% for density when 3.5wt% of nitrogen gas was injected in the film gate. Further analysis was conducted to verify this phenomenon, revealing that the contact area between the gate and product had the greatest impact. Our findings indicate that to ensure uniform generation of foamed cells in microcellular foaming product design, a gate with a wide contact area should be secured.

• 복식
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• 제64권4호
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• pp.91-105
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• 2014

As luxury goods market has expanded and has become more affordable, luxury consumption value has become more diversified. The purpose of this study is to classify visible characteristics of luxury consumption by the degree of logo clarity, and to explain this classification in relation to personal luxury consumption values. Also, the study utilized the concept of cultural capital, in addition to the concept of economic capital, in order to aid understanding of current new luxury consumption trend and give directions on brand signal strategies for luxury brands. In order to develop a survey that could measure an individual's cultural capital, focus group interviews, each composed of 5 women in their twenties and thirties, were conducted. Then, the survey was conducted on 230 females residing in Seoul who have purchased at least one product from a luxury brand within a year. The results suggest that luxury consumption can be explained by 'self-oriented value' and 'others-oriented value' as suggested in precedent studies. However, no significant difference was found between economic capital and these two luxury consumption values. However, the more cultural capital one possesses, the more one is likely to pursue 'self-oriented consumption value'. In studying the correlation between luxury consumption values and preference for brand signal clarity, respondents with 'self-oriented consumption value' has shown low preference towards highly visible brand logo when design and quality were equivalent. Also, respondents with 'other-oriented consumption value' has shown high preference towards highly visible brand logo.

• 한국지반공학회논문집
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• 제24권5호
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• pp.27-35
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• 2008

신뢰성 설계를 위한 설계변수의 특성치에 대하여 국내 해양토질을 이용하여 연구하였다. 특성치 산정에 대한 연구결과, Student/Ovesen, Schneider 및 EN 1990 방법의 순으로 평균치에 근접한 것으로 나타났고, EN 1990 방법은 지반특성치 산정방법의 신뢰성 차원에서 부적합한 것을 확인하였다. 그리고 제시된 네가지 특성치 산정방법은 토질의 변동성이 커짐에 따라 특성치를 보수적으로 평가하는 경향을 보였다. 또한 이러한 산정된 특성치가 실 설계에 미치는 영향을 파악하기 위하여 방파제에 대하여 임의 하중하에서 미개량 지반의 지지력 및 침하특성을 검토하였다. Schneider 방법을 이용하여 산정한 결과와 토질정수의 산술평균치를 이용한 결과를 비교한 결과, 허용지지력/작용하중비의 경우 전자가 후자의 65%로 나타났고, 침하량의 경우에는 13.6%를 제시하여 과소평가한 결과였다. 그리고 과거 설계사례에서 산술평균치로 결정된 대표치에 의한 것과 본 논문에서 각 지역의 자료로부터 산정한 특성치에 따른 설계결과를 비교한 결과, 산술평균치로 결정된 대표치에 의한 설계는 대부분 과대평가의 결과를 제시하였다.

• 디자인융복합연구
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• 제14권1호
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• pp.1-13
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• 2015

본 연구에서는 스마트 디바이스 기반 교육서비스에 대하여 학습자들이 추구하는 기대 가치가 무엇인지 사용자 경험의 측면에서 접근하여 밝혀내고, 그 결과를 통해 향후 새로운 서비스를 디자인 하는데 있어서 도움이 되고자 하였다. 이를 위하여, 문헌과 집단 대면 인터뷰를 통하여 71개의 기대 항목을 도출하고 이를 활용한 설문을 진행하여 총 13개의 기대 가치를 도출였다. 최종 도출된 스마트 디바이스 기반 교육서비스 디자인을 위한 사용자 기대 가치는 '자신만의 맞춤화된 학습', '언제 어디서나 학습', '진로와 연계될 수 있는 학습', '상호작용을 통한 학습', '다양한 학습 자원을 활용한 학습', '협력을 통한 학습', '교류를 통한 학습', '나에 의한 학습', '실제적인 맥락 하에서 이루어지는 학습', '피드백이 제공되는 학습', '자투리 시간을 활용하는 학습', '동기와 보상을 제공받는 학습', 그리고 '단계적으로 이루어지는 학습' 이었다. 또한 이러한 사용자 기대가치는 여성 집단, 고등학생 집단 그리고 스마트 디바이스 기반 교육서비스에 대해 '잘 알고 있음'으로 응답한 집단에서 보다 높은 것으로 나타났다.

• 전기학회논문지P
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• 제59권1호
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• pp.64-70
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• 2010

This paper presents how to decide on tuning factor(${\delta}$) and quality factor(Q) values in design of single-tuned passive harmonic filters. Tuning factor(${\delta}$) and quality factor(Q) values have to consider before decision on circuit parameters of passive filters. A Study on these two value has not been scarcely performed and only experienced values has been used in passive harmonic filter design by far. As a experienced value, in cases of 5th and 7th filter, tuning factor(${\delta}$) is about 0.94 and 0.96 respectively and quality factor(Q) is, in all cases of, 50. If Single-tuned passive harmonic filter will be off-tuned, performance of filter will be decreased steeply and occur to parallel resonance between system reactance and filter capacitance. Therefore During the operation, In order not to off-tuning, Filter must be tuned at former order than actual tuning order. This is the same that total impedance of filter must have a reactive impedance. In this paper, Tuning factor(${\delta}$) is decided via example of real system and using the bode-plot and then performance of filters confirmed by filter current absorbtion rate. And Quality factor(Q) decided using the bode plot in example system and then performance of filters confirmed by filter current absorbtion rate also, which makes a calculated filter parameters to satisfy IEEE-519 distortion limits. Finally, Performance of the designed passive harmonic filter using the tuning factor(${\delta}$) and quality factor(Q) values, decided in this paper is verified by experiment and shows that 5th, 7th, 9th, 11th and 13th current harmonic distortions are decreased within IEEE-519 distortion limits, respectively.

• 생물환경조절학회지
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• 제23권3호
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• pp.174-180
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• 2014

Standard weather data available to greenhouse environmental design are limited in most regions of the country. So, instead of using standard weather data, in order to find the method to build design weather data for greenhouse heating and cooling, design outdoor weather conditions were analyzed and compared by TAC method and frequency analysis using climatological normal and thirty years from 1981 to 2010 hourly weather data provided by KMA and standard weather data provided by KSES. Average TAC values of outdoor temperature, relative humidity and insolation using thirty years hourly weather data showed a good agreement with them using standard weather data. Therefore, in regions which are not available standard weather data, we suggest that design outdoor weather conditions should be analyzed using thirty years hourly weather data. Average of TAC values derived from every year hourly weather data during the whole period can be established as environmental design standards, and also minimum and maximum of them can be used as reference data.