• 한국공간구조학회논문집
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• 제17권4호
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• pp.123-132
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• 2017

A smart tuned mass damper (TMD) was developed to provide better control performance than a passive TMD for reduction of earthquake induced-responses. Because a passive TMD was developed decades ago, optimal design methods for structural parameters of a TMD, such as damping constant and stiffness, have been developed already. However, studies of optimal design method for structural parameters of a smart TMD were little performed to date. Therefore, parameter studies of structural properties of a smart TMD were conducted in this paper to develop optimal design method of a smart TMD under seismic excitation. A retractable-roof spatial structure was used as an example structure. Because dynamic characteristics of a retractable-roof spatial structure is changed based on opened or closed roof condition, control performance of smart TMD under off-tuning was investigated. Because mass ratio of TMD and smart TMD mainly affect control performance, variation of control performance due to mass ratio was investigated. Parameter studies of structural properties of a smart TMD was performed to find optimal damping constant and stiffness and it was compared with the results of optimal passive TMD design method. The design process developed in this study is expected to be used for preliminary design of a smart TMD for a retractable-roof spatial structure.

• 한국의상디자인학회지
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• 제3권2호
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• pp.51-62
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• 2001

This study was intended to investigate the contemporary meaning of transparent design expressed in contemporary fashion by inquiring into its plasticity expressed in contemporary design and fashion and analyzing the association between them. It used the comparative anesthetic method widely used by H. W lfflin and other scholars in eliciting the differences and similarities in styles. It attempted to investigate the plasticity of transparent design expressed in contemporary design by dividing it into the epidermal, spatial and ideological effects. Contemporary design expressed the epidermal effects such as lightness(nimbleness), smoothness, contrast and stress It expressed the spatial effects such as spatial flexibility through the interpenetration of interior and exterior spaces, expansion of the space and the like. And it expressed ideological effects such as openness, pureness, playfulness and the like. In terms of lightness, contemporary design expressed actual or visual lightness by using transparent materials. In terms of the interpenetration of interior and exterior spaces, it expressed the interpenetration of the interior space into the exterior spaces and vice versa. In terms of spatial expansion, contemporary design expressed the infinite spatial connection by drawing the exterior space into the interior space. Contrast and stress were formed by imposing visual unity on contemporary fashion by using opaque and transparent materials. In terms of openness, contemporary design expressed contemporary people's candor and dependability by making the inside of the building or object look outward. To express pureness, contemporary design used the clear and transparent image by using the glass or translucent materials taking on the pure property. To express playfulness, contemporary made use of the vagueness of the spatial boundary, the locational switching of inner and outer spaces, and interesting external forms occurring when light pass through opaque and transparent materials.

• 디지털융복합연구
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• 제13권5호
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• pp.317-327
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• 2015

창의적 공간디자인 교육을 위해서는 온라인을 비롯한 새로운 커뮤니케이션의 융합이 필요하며, 이에 대한 실증적 연구의 필요성에서 본 연구는 시도되었다. 본 연구의 목적은 공간디자인 교육과 커뮤니케이션 방법에 대한 체계적 이해와 함께 실제 공간디자인 스튜디오 수업사례를 통해 온 오프라인 커뮤니케이션 방법의 융합에서 인지되는 친밀도와 유용성을 분석하는 것이다. 연구결과, 공간디자인의 단계별로 유용하게 적용되는 커뮤니케이션 방법이 각각 다르게 나타났고, 일방향적인 커뮤니케이션 방법보다 강의자뿐만 아니라 수강생 간의 양방향 커뮤니케이션이 가능한 방법이 더욱 유용하게 인식되는 것으로 나타났다. 또한, 이미지 등 시각적 자료와 함께 하는 온라인 커뮤니케이션 방법에 대한 친밀도와 유용성이 드러났다. 이러한 결과를 바탕으로 공간디자인 교육을 위한 새로운 커뮤니케이션 방법에 대한 올바른 방향에서의 융합이 요구된다.

• 한국가구학회지
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• 제19권1호
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• pp.44-54
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• 2008

The blur phenomenon, in which the boundaries of fields or roles become vague, has become an important concept of design in the 21st century. In furniture design, the physical boundary between furniture and space and that between space and furniture has been broken down and their meaning tends to be redundant. This concept was begun by a variety of furniture designers who led the trends about 30 years ago. A progressive exhibition titled ${\ulcorner}$Living Tomorrow${\lrcorner}$, which was included in the Koln International Mobelmess from 1968 to 1970, showed that the blur phenomenon in furniture design has never actually been novel. These exhibitions and the works exhibited in the events are still recognized as progressive examples that proposed an avant-garde concept of life. They are in line with the current furniture design based on spatial concepts, which has been created by the blur phenomenon. The purposes of this study are to determine the cases of furniture design that enable the so-called spatial functions beyond the simple functions of seating, use, and display, from those of furniture design and to research their characteristics. In this study, furniture based on spatial concepts means furniture that creates 3D spaces consisting of the floor, walls, and ceiling by the blur phenomenon that occurs from the spaces among these pieces of furniture. The organization of this study is as follows; In Chapter 2, a background on the generation of furniture design based on spatial concepts is described based on the research literature of this socio-cultural phenomena. In Chapter 3, the cases of relevant furniture design redescribed. In Chapter 4, the collected cases are analyzed and their characteristics described. In Chapter 5, Chapter 1 to Chapter 4 are summarized and conclusions are given. In addition, future research is proposed.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
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• pp.398-403
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• 2000

The design of multi-stage gear drives is a time-consuming process that includes additional design problems, which are not considered in the design of single-stage gear drives. In the previous research works, the authors have proposed a new algorithm to design multi-stage gear drives at the preliminary design phase. The proposed design algorithm automates the design process by integrating the dimensional design and the configuration design process. In the configuration design process, the positions of gears and shafts are determined by minimizing the geometrical volume (size) of a gearbox. However, various types of spatial constraints should be satisfied in practical design situation. To locate input and output shaft in specified positions is the typical example of such problems. In this paper, the authors show the formulations of spatial constraints applied to the design of four-stage gear drives. The design solution shows considerably good results, and the design system is confirmed to be readily applicable to practical design situation.

• 한국공간구조학회:학술대회논문집
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• 한국공간구조학회 2005년도 춘계학술발표회 및 정기총회 2권1호(통권2호)
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• pp.227-235
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• 2005

The earthquake-resistant structural systems have to ensure the sufficient stiffness and ductility for the stability. For those purposes, recently, the performance design concept to increase the degree of absorbed energy level of structures has been proposed. One practical way of the performance design in the spatial structures is to apply the isolation system to boundary parts of roof system and sub-structure to obtain the target performance. So, it is necessary to examine the characteristics of dynamic behavior of spatial structures governed by higher modes rather than lower modes different from the cases of high rise buildings. The objectives of this paper are to develop the equivalent model to simplify the analytical processes and to investigate the dynamic behavior of roof system according to the mass and the stiffness of sub-structures as a fundamental study of performance design for the spatial structures.

• 한국실내디자인학회논문집
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• 제13호
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• pp.238-248
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• 1997

The spatial form of architecture in the same era has its own common characteristic spatial form. This study is based on this proposition and is focused on how architectural spatial forms have been changed up to now after modern ages(from the beinging of 1900s to the early days of 1990s ; from early modern age, golden modern age, post modern, late modern architecture to recent experimental trend) and how architectural theories of spatial forms will be changed in the future is predicted.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 1997년도 춘계학술대회 논문집
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• pp.113-118
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• 1997

This paper presents the dimensional synthesis and kinematic analysis of the RSCS-SSP motion generating spatial mechanism using the displacement matrix method. This type of spatial mechani는 is used for the Mcpherson suspension in small automobiles. It is modeled for the wheel bump/rebound and steering motion. First, the suspension is modeled as a multiloop spatial rigid body guidance mechanism for the two major motions. Then the design equations for SSP, RS, and SC strut links are applied to synthesize an RSCS-SSP for up to three prescribed positions for the steering motiom from the suspension design specification. Thus a RSCS-SSP mechanism which is synthesized is also analyzed for the displacement during the steering motion.

• 한국디자인학회:학술대회논문집
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• 한국디자인학회 2004년도 춘계 학술발표대회 논문집
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• pp.54-55
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• 2004

• 설비공학논문집
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• 제24권4호
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• pp.364-375
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• 2012

This study investigates the effects of interior design elements on the satisfaction and preference for space. Field measurements and surveys were conducted in three coffeeshops where various interior design elements were applied. Results indicate that movable tables and chairs for two people were preferred in the space. They need to be placed flexibly according to the visitors' needs to improve satisfaction for convenience. To improve spatial satisfaction, the brightness of color applied to wall surfaces was recommended to be lower than that of color used for floor surfaces. The surfaces of space and interior design elements such as furniture also need to be kept clean. Lamps with lower color temperature were effective to enhance spatial satisfaction. Light sources should be shielded when a pendant lighting system with general diffuse type was used in space. Natural daylight through window was also required for better satisfaction level. Multiple linear regression implied that the cozy feeling by electric light, existence of daylight, flexible layouts for tables and chairs, color and quality of material for tables and floor were significant contributors to overall spatial satisfaction.