• 한국의상디자인학회지
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• 제17권3호
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• pp.29-43
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• 2015

This study investigates transformable designs in contemporary fashion. In contemporary society, designs are accompanied by various changes such as transformation of shapes or variation of material beyond the certain form of dress. As a result of having interest in transformable designs with the various attempts on the overall design, transformable design is being suggested as an attempt as the new manner, radical concept, or alternative of multi-purpose lifestyle. With the constant research and collection presentation by the designers of empirical disposition, transformable dress has been evolving gradually. The feature of transformable design appeared in dress is considered as 'variability' which changes in the flow of time. Furthermore, the morphological variability and variability of material have been examined as visual stimuli and conversion of material. By analyzing and assorting diverse transformable dresses comprehensively, it could be divided into technique-oriented transformable design and transformable design with a wearer's intervention. The technique-oriented transformable design is subdivided into the conversion of material and the conversion of form; the transformable design with a wearer's intervention into the conversion of functional frame and the conversion of aesthetic feature.

• 복식
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• 제53권8호
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• pp.91-104
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• 2003

This study describes not only meaning of transformable, i.e., new paradigm being expanded since the 1990's, but also nomadic thoughts being formation background of transformable. In this study, the concept of ‘transformable’ has dictionary definition and theoretical background expressing art, architecture and products, etc. The author has examined relations between nomadic thoughts and ‘transformable clothing’ by investigating the works of transformable clothing designers including Lucy Orta. The ‘transformable clothing’ means ‘clothing being transformable to meet some purposes’. Considering nomadic thoughts, 1.e., one of formation of transformable, the transformable clothing with nomadic thoughts can be transformed in various ways by usefulness and removal. The clothing has features of removal, escape and protection and has the values that can adapt itself to social circumstance and environment through the module system of separation, taking to pieces and assembling, etc. to suggest resonable clothing. Such a clothing cannot be settled down so that it shall be developed to let modern people move continuously as the 21th century nomad between real world and virtual world. However, this study did not examine internal meaning sufficiently because of main investigation objects of external expression, and was limited to nomadic thought at formation background. To improve such things, another study will be made in the future.

• 한국정보과학회논문지:소프트웨어및응용
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• 제33권1호
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• pp.138-141
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• 2006

LR 문법의 부분 클래스인 k-transformable 문법, PLR 문법, 확장된 PLR 문법은 LL 문법으로의 커버링 변환이 존재하는 클래스이다. 한편 이들 클래스에 대한 LL 커버링 변환 방법은 모두 다른 정형식에 근거하기에, 제시된 LL 커버링 변환간의 관련성은 명확하지 않다. 본 논문에서는 LL 커버링 변환에 관한 통합 모델을 제시한다. 기존 클래스에 대한 변환 방법들은 제시된 모델의 특정한 예로서 생성된다.

• 한국정보과학회논문지:소프트웨어및응용
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• 제26권8호
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• pp.1028-1038
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• 1999

본 논문에선 LR 문법의 부분 클래스를 동치인 LL 문법으로 변환하는 방법을 제시한다. 이 변환이 적용 가능한 문법을 확장된k`-transformable 문법이라 정의한다. 변환된 문법은 left-to-right 커버의 성질을 만족한다. 기존 연구에서 제시한 변환 방법은 LR 문법의 부분 클래스인 {{{{k`-transformable 클래스와 PLR 클래스를 LL 문법으로 바꾼다. 이 논문에서 제시하는 새로운 변환 방법의 적용 가능한 문법의 범위는 k`-transformable 클래스와 PLR 클래스를 포함한다. 기존의 커버링 성질을 만족하는 LL로의 문법 변환은 보편적인 LR 파서의 행동을 시뮬레이션하여 얻어진다. 이 과정에서 쉬프트, 리듀스 행동 이외에 무한의 가능성을 가진 스택 스트링의 유한 표현을 위해 리덕션 심볼에 대한 예상 행동이 추가된다. 본 논문에서는 파싱 문맥을 나타내는 LR 아이템들을 기존의 스택 스트링 표현 형태에 추가하여 스택 스트링 표현법을 정제하고, 리덕션 심볼에 대한 예상 방법을 확장하는 정형식을 제시한다. 이에 근거하여 LL 커버링 문법이 존재하는 클래스를 확장된 {{{{k`-transformable 문법으로 확장시킨다.Abstract A new transformation of a subclass of LR(k`) grammars into equivalent LL(k`) grammars is studied. The subclass of LR(k`) grammars is called extended k`-transformable. The transformed LL(k`) grammars left-to-right cover the original LR(k`) grammars. Previous transformations transform k`-transformable and PLR(k`) into LL(k`). The new transformation is more powerful in that it handles the extended k`-transformable subclass of LR(k`), which strictly includes k`-transformable and PLR(k`) classes. The previous covering transformations into LL grammars are obtained by simulating the actions of the conventional LR parser. Specially, a predict action of reduction goals is added to the action set in order to finitely represent stack string. In this paper, the stack string representation is refined by adding LR items to represent a parsing context, and the prediction of reduction goal is extended by generalizing the prediction formalism. Based on them, the previous grammar classes with LL({{{{k`) covering grammars are extended to extended k`-transformable grammars.

• 한국의상디자인학회지
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• 제24권2호
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• pp.11-26
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• 2022

The Hallyu wave based on K-pop and K-culture has increased the global interest in Korean culture. Therefore, to satisfy consumer demand, there is an attempt to develop a variable fashion design using traditional Korean culture. Transformable fashion design causes changes in form and meaning according to various situations and needs and can induce active participation of consumers. Therefore, we intend to propose a transformable fashion design that is based on traditional Korean culture but appears in a new form and meets the needs of consumers of fashion design. Among Korean traditional culture, wrapping cloths, bojagi are practically used by ordinary people until now, and their shape and use change according to the user's needs. This study intends to derive expression characteristics by examining the expression tendencies of bojagi and to develop transformable fashion designs through the derived data. The purpose of this study is to make and propose transformable fashion designs in real life using the expression characteristics of Korean bojagi. As the method of this study, we first conducted a literature review. Through this, a case study of empirical production was conducted in parallel with the development and production of transformable fashion designs using bojagi. A total of three illustrations and six variable fashion designs were developed. Two of the six works are transformable fashion design that change through movement and expansion of the square shape, the prototype of the bojagi, and two works are modular, bringing changes in function through combination and separation. The work was produced as a multi-purpose transformable fashion design that can be used as clothes or a bag.

• 한국정밀공학회지
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• 제30권1호
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• pp.32-38
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• 2013

Small mobile robots which use round wheels are suitable for driving on a flat surface, but it cannot climb the obstacle whose height is greater than the radius of wheels. As an alternative, legged-wheels have been proposed by many researchers due to its better climbing performance. However, driving and climbing performances have a trade-off relationship so that their driving performance should be sacrificed. In this study, in order to achieve both driving and climbing performances, a new transformable wheel was developed. The developed transformable wheel can have a round shape on a flat surface and change its shape into legged-wheel when it makes a contact with an obstacle. For design of the transformable wheel, the performance of legged-wheel was analyzed with respect to the number and curvature of the leg, and then the new transformable wheel was designed based on the analysis. Contrary to the existing transformable wheels that contain additional actuators for the transformation, the developed transformable wheel can be unfolded without any additional actuator. In this study, in order to validate the transformable wheel, a simple robot platform was fabricated. Consequently, it climbed the obstacle whose height is 2.6 times greater than the wheel radius.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2010년도 춘계학술대회 논문집
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• pp.1219-1220
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• 2010

• 한국의류학회지
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• 제45권3호
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• pp.439-452
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• 2021

The purpose of this thesis is to compare the efficiency of 3D digital design technology with traditional hand-drawn designs of a transformable dress for a small wedding. After reviewing the literature, this empirical study analyzed the tendencies of small wedding dress design, concluding that a transformable dress for a small wedding consists of a bodice, skirt, and outer skirt or gown with train, each of which has five possible designs, resulting in 15 virtual items within the 3D program. The 3D program provides the benefit of easy design development as well as reduced costs and design time. Specifically, the random combination of 15 items with layers in the 3D program produced 150 different styles in 5 hours, while hand-drawing 150 dresses took 50 hours. Moreover, the 3D program does not need any material, but 150 physical drawings required a sketchbook, pencil, eraser, and marker, total cost 31,100 won. Additionally, the 3D whole-body scan helps the bride decide which design she prefers through virtual try-ons. Eventually, the 3D program could help a bride decide what she prefers and produce it with virtual simulation, resulting in reduced time and costs.

• 한국세라믹학회지
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• 제34권6호
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• pp.645-651
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• 1997

입성장 제어없이 정방정 니르코니아의 파괴인성과 상 안정성을 증진시키기 위해 $Y_{2}O_{3}$와 $Nb_{2}O_{5}$가 첨가된 정방정 지르코니아를 상압소결방법으로 제조하였다. 지르코니아 복합체는 상 안정성이 뛰어난 조성에 상변화가 우수한 조성을 중량비로 혼합 합성하였다. 상변화가 우수한 조성을 15 wt% 첨가한 복합체와 동일한 단일조성의 경우 공기중에 $1500^{\circ}C$ 10시간 소결후 9$MPam^{1/2}$의 파괴인성값과 $220^{\circ}C$에서 $1000^{\circ}C$/까지 100시간이상 agmg을 한 뒤에도 우수한 저온 및 고온 상 안정성이 관찰되었다. 복합체와 상응하는 단일조성은 90.24 mol% $ZrO_2$-5.31 mol% $Y_{2}O_{3}$ mol% $Nb_{2}O_{5}$이었다. 조직관찰 결과 결정립은 소결시간에 따라 증가하였으며 미세균열이나 twinning은 발견되지 않았다.

• International Journal of Control, Automation, and Systems
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• 제1권1호
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• pp.76-82
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• 2003

This paper establishes some integral equalities formulated by zeros located in the convergence region of a Laplace transformable function. Using the definition of the Laplace transform, it shows that Laplace transformable functions have to satisfy the integral equalities in the time-domain, which can be applied to the understanding of the fundamental limitations on the control system represented by the transfer function. In the unity-feedback control scheme, another integral equality is derived on the output response of the system with open-loop poles located in the convergence region of the output function. From these integral equalities, two sufficient conditions related to undershoot and overshoot phenomena in the step response, respectively, are investigated.