• 한국지진공학회논문집
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• 제7권5호
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• pp.93-102
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• 2003

이 연구에서는 지진하중을 받는 빌딩구조물에 대한 복합구조제어시스템의 최적설계방법을 제시한다. 복합구조제어시스템의 설계는 구조물의 부재뿐만 아니라 수동제어시스템 및 능동제어시스템의 용량 및 위치 최적화 과정으로 정의된다. 최적설계는 이 연구에서 제안된 다단계 목표계획법(Multi-Stage Goal Programming)을 이용하여 최적화문제를 정식화하고 목표갱신 유전자알고리즘(Goal-Updating Genetic Algorithm을 적용하여 합리적인 최적화를 진행해가는 과정으로 구성된다. 다단계 목표계획법에서는 구조물의 층간 상대변위와 제어시스템의 용량에 대한 설계목표를 여러 단계로 선정하고, 각 물리량과 설계목표간의 정규화된 거리 합으로서 목적함수를 정의한다. 목표갱신 유전자알고리즘은 각 단계별 설계목표를 만족하는 최적해를 검색하고, 현 단계의 모든 설계목표를 만족하는 최적해가 존재할 경우 설계목표를 순차적으로 갱신함으로써 보다 상위수준의 설계목표로 접근해 나아간다. 지진하중을 받는 9층의 빌딩구조물에 대한 수치 예를 통하여 복합구조제어시스템의 통합최적설계 과정을 기술하였고, 구조부재, 수동 및 능동제어시스템이 균등분포된 구조물과 최적 설계결과를 비교하여 제시하는 방법의 효율성을 검증하였다.

• 디자인학연구
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• 제9권
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• pp.1101-1114
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• 1994

As of today-half a century has passed after 1945, the liberation from Japanese imperialism-it's significant to introspect our culture. On the one hand our culture has succeeded due to the peculiar history, but on the other hand it hasn't. So to speak, it has gained in Quantity but lost in Quality. There are keen, international competition and exchange in the modern culture. So the Qualitive success of modern design depends on if it had an original character or not. According to Korean rapid industrialization, technological extence, and economic growth, the export has increased greatly, but package design hasn't been match for them. Korean expoters have been meeting with cutthroat competition in world market. Under these circumstances it's very important that we have a real understand and interest in our culture, we strengthen the competitive power of home products with good package design. This is our age of not home market but world market. We live in an age when design wins, so that we have to develop the good design native to Korea. Many designers have proposed their opinions with the characteristic designs, but it has been only a fragmentary and passive method. We must seek for the new method more positively. The effective and proper method resolves itself into the following four points. First, to understand Korean history and culture. Second, to have the exact grip of this economic situation. Third, to promote the national emotion. Fourth, in conclusion, to accord the package design with them. We cannot put off this task to overcome the cultural subordination, to place Korea on a firm cultural basis in the world, and to contribute to the cultural exchange of package design. First, to understand Korean history and culture. Second, to have the exact grip of this economic situation. Third, to promote the national emotion. Fourth, in conclusion, to accord the package design with them. We cannot put off this task to overcome the cultural subordination, to place Korea on a firm cultural basis in the world, and to contribute to the cultural exchange of package design.

• 한국지진공학회논문집
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• 제6권5호
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• pp.37-43
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• 2002

복합구조제어시스템의 동시최적설계방법에 관하여 연구하였다. 여기에서는 수동제어장치 뿐만 아니라 능동제어장치의 배치와 용량, 제어기 등이 설계변수가 되며 설계인자들의 만족도를 나타내는 선호도함수를 정의하여 이를 이용하여 최적화문제를 정식화한다. 또한 수동 및 능동제어장치의 설계변수로부터 동시에 최적해를 찾아내기 의한 수치적 방법으로 유전자알고리즘을 사용하였다. 지진하중을 받는 다자유도 구조물의 설계에 및 수치모사를 통하여 제안한 방법의 타당성을 검증하고자 하였다.

• 대한기계학회논문집A
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• 제36권1호
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• pp.103-108
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• 2012

본 논문에서는 수직다관절 로봇에 걸리는 중력 토크를 보상하는데 주로 사용되는 스프링 중력보상장치의 최적설계에 대하여 기술하였다. 스트레스, 좌굴, 피로 조건과 같은 스프링 설계에 대한 다수의 비선형 제약 조건을 반영하면서, 동시에 계산 시간을 줄이기 위하여, SQP(Sequential Quadratic Programming)를 적용하였다. 또한 정수해를 가져야 하는 설계 변수를 반영하기 위하여, Continuous Relaxation 방법을 사용하였다. 시뮬레이션을 통하여 설계된 중력보상 장치가 주요 작업 영역에서 추가의 무게 증가 없이 중력 보상 성능이 효과적으로 높아짐을 입증하였다.

• 한국실내디자인학회논문집
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• 제27권2호
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• pp.175-185
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• 2018

The purpose of this study is to analyze the concept of 'Gradual Differentiation' in parametric design in terms of pure model logic and thus describe the distinctive feature from the previous design method. To meet the purpose, it explores external cases like gradual factor identified in natural phenomenon and artworks and define the inherent model principles into "Self-similarity', "Correlation', and 'Temporality' by examining these features in terms of algorithm. Meanwhile, it identified the principle of gradual model representation in parametric design within a single system called 'Attractor System' by applying these three concepts into specific methods of parametric design, and by interpreting the logical structure through the association among 'Attractor', 'Field', and 'Differentiation'. The creative utilization of parameter shows that gradual model process in parametric design does not mean a passive "conversion process" merely replacing natural parameter with algorithm; rather, it refers to an active "generating process" creating new meanings and value. By continuing this process of conceptual understanding and insight, creative perspective and practical ability to interpret parameter can be improved.

• 대한건축학회논문집:계획계
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• 제34권2호
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• pp.13-21
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• 2018

The elderly are more likely to experience passive emotions such as loneliness, anxiety, and depression due to decreased physiological function and low participation in social activities. Therefore, the purpose of this study is to seek how to apply biophilic design from a healing perspective considering mental health to the residential space for the elderly. Biophilic design has a positive effect on the psychological stability of human being and the creation of a human-centered environment that provides various benefits to people's health through the combination with natural elements. The method of this study is as follows. First, survey tools are developed by reviewing literature related to biophilic design and planning factors in housing. Second, we conduct the survey around mental health status and preference of applying biophilic design patterns to the elderly and pre-elderly. Third, we propose a plan to apply biophilic design patterns in houses based on the analyzed results. The biophilic design pattern covered in this study is meaningful in that it seeks clues, the housing plan to create healing environment for the elderly with the nature friendly view.

• 한국공간구조학회논문집
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• 제19권3호
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• pp.51-59
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• 2019

A hybrid mid-story seismic isolation system with a smart damper has been proposed to mitigate seismic responses of tall buildings. Based on previous research, a hybrid mid-story seismic isolation system can provide effective control performance for reduction of seismic responses of tall buildings. Structural design of the hybrid mid-story seismic isolation system is generally performed after completion of structural design of a building structure. This design concept is called as an iterative design which is a general design process for structures and control devices. In the iterative design process, optimal design solution for the structure and control system is changed at each design stage. To solve this problem, the integrated optimal design method for the hybrid mid-story seismic isolation system and building structure was proposed in this study. An existing building with mid-story isolation system, i.e. Shiodome Sumitomo Building, was selected as an example structure for more realistic study. The hybrid mid-story isolation system in this study was composed of MR (magnetorheological) dampers. The stiffnessess and damping coefficients of the example building, maximum capacity of MR damper, and stiffness of isolation bearing were simultaneously optimized. Multi-objective genetic optimization method was employed for the simultaneous optimization of the example structure and the mid-story seismic isolation system. The optimization results show that the simultaneous optimization method can provide better control performance than the passive mid-story isolation system with reduction of structural materials.

• 융합정보논문지
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• 제7권5호
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• pp.95-102
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• 2017

창의적 교육을 위한 모듈형 완구는 다양한 형태의 움직임을 만들어 주는 기능 블럭이 요구된다. 우선 동작을 만들 수 있는 능동 구동 모듈이 필요하고 이와 결합하여 동작을 표현해 낼 수 있기 위한 수동 연결 블록이 다수 필요하다. 본 논문에서는 다양한 창의적 동작을 만들어 낼 수 있는 모듈형 완구에 대한 구성 요소의 설계와 이를 연결하여 동작 시킬 수 있는 제어기 구조를 제안 하였다. 설계된 모듈간의 연결을 원활하게 하기 위한 기구적인 연결 방법을 제시 하였고 이에 적합한 기구구조를 제안하였다. 아울러 모듈형 동작 완구와 연계 되어 동작할 수 있는 다양한 형태의 센서 모듈에 대한 설계를 다루었다. 이런 완구를 이용하여 교육적으로 모방할 수 있는 전형적인 표준 응용 형태를 제안하고 설계된 모듈과 구성 요소를 이용하여 실제로 적용하여 모듈형 완구의 유용성을 보였다. 제안된 방식은 실제 교육용 완구에 적용하여 동작을 기록하고 반복 동작을 수행하여 효과적으로 동작됨을 보였다.

• 한국의류학회지
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• 제36권11호
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• pp.1162-1173
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• 2012

This study classifies conspicuous consumption groups and the difference of fashion involvement and selfsatisfaction by each group. It also examined the effect of fashion involvement on self-satisfaction by each group. A questionnaire method was used for the study method and the subjects of the study were females in their 20s-50s. A total of 580 sets of questionnaires were distributed and 554 sets were used for the final analysis. Data were analyzed by factor analysis, t-test, ANOVA, factor analysis, cluster analysis, Cronbach's alpha coefficients, and multiple regression analysis. The results of this study were as follows: First, this study classified 4 groups of active conspicuous consumption, the group of passive conspicuous consumption, the group of syntonic conspicuous consumption and the group pursuing individuality & frugal consumption. Second, as a result of the examination of the impact of fashion involvement for each group with a propensity for conspicuous consumption on their self-satisfaction, it was found that the sex appeal of fashion involvement had no significant impact on the economic satisfaction in the group of active conspicuous consumption, and had no significant impact on all elements of self-satisfaction in the group of passive conspicuous consumption. It was also found that social symbolism had a negative impact on satisfaction with looks in the group of syntonic conspicuous consumption, and the physical complementation and directions of looks had a negative impact on satisfaction with living, the social symbolism on satisfaction with looks and the syntone on satisfaction with looks in the group of pursuing individuality & frugal consumption.

• 마이크로전자및패키징학회지
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• 제22권1호
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• pp.75-81
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• 2015

본 논문에서는 2개의 패시브 소자가 임베디드된 PoP(Package on Package)용 양면 기판의 휨을 감소시키기 위해 유한요소법을 이용한 수치해석과 파라메타 설계를 위한 다구찌법이 사용되었다. 양면 회로층 두께와 솔더 레지스트 두께가 4인자 3수준으로 설계되어 파라메타 영향도가 분석되었다. 또한, 유닛 영역의 솔더 레지스트가 제거하거나 도포된 모델의 휨을 해석하여 솔더 레지스트의 영향도를 분석하였다. 마지막으로 실험을 통해 수치해석과 다구찌법에 의한 파라메타 설계의 효과를 입증하였다. 연구결과에 의하면 휨에 미치는 영향은 볼 사이드에 있는 회로층이 지배적으로 크고 칩 사이드의 회로층이 두 번째로 크며 솔더 레지스트의 영향이 가장 작았다. 또한, 칩 사이드 유닛영역의 솔더 레지스트는 도포 유무에 따른 영향도가 매우 작았다. 한편 기판의 휨은 볼 사이드 회로층의 두께가 얇을수록, 칩 사이드 회로층의 두께와 솔더 레지스트의 두께는 두꺼울수록 감소하였다.