• 대한기계학회논문집
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• 제16권9호
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• pp.1722-1727
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• 1992

본 연구에서는 이러한 불확실한 시스템에 대하여 정규화 형태의 추정기를 적 용한 적응 입출력 선형화 제어기의 설계에 대해 연구하였으며, 신호 성장속도(signal growth rates)의 개념을 도입하여 안정성을 해석하였다. 정규화 형태의 추정기를 적 용함으로써 큰 불확실성에 대해 보다 안정한 수렴 특성을 얻을 수 있음을 시뮬레이션 을 통해 보였다.

• 한국산업융합학회 논문집
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• 제26권6_3호
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• pp.1333-1339
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• 2023

To produce activated carbon fibers, the process is carried out through either physical activation method or chemical activation method. In this study, we present the results regarding the characteristics of activated carbon fibers manufactured under various conditions through the quantitative control of steam. The yield after activation indicates a decreasing trend with the increase in steam quantity and activation time. Additionally, specific surface area characteristics exhibit variations based on activation time and steam flow rate. The SEM analysis results reveal that higher steam flow rates lead to the presence of both mesopores and macropores on the surface of activated carbon fibers (ACF).

• 대한기계학회논문집
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• 제19권8호
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• pp.1901-1906
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• 1995

The frequency response functions of systems incorporating a non-linear cubic stiffness subject to sinusoidal excitation are derived using the Volterra series and the convergence characteristics investigated. It is shown that the series representation of the frequency response functions converges only when the sinewave input amplitude is within a certain range. Within the range of convergence the frequency response function based on the Volterra series approaches the analytical one as more higher order frequency response function terms are included. Proposed is a criterion for the studies systems to predict approximately the range of sinewave input amplitude for which the series representation of the frequency response functions converges.

• 디지털융복합연구
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• 제10권9호
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• pp.263-270
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• 2012

현대사회는 융합의 시대라 할 수 있다. 이동통신 단말기 산업계에는 모바일 컨버전스 시대로의 급격한 변혁이 되고 있다. 최근 우리나라의 경우 스마트폰 이용자는 급격하게 늘어가고 있으며 지식정보화 사회로 가속화 될수록 스마트폰의 새로운 역할과 가치가 증대되어 생활 전반에 미치는 영향은 더욱 커질 것으로 판단된다. 본 연구에서는 중국인에게 있어서의 스마트폰 특성과 이용만족, 재 구매 의도간의 영향관계를 살펴보고 향후 마케팅 전략수립의 기초가 되고자 한다. 본 연구의 결과를 요약하면 스마트폰의 심미적 특성, 기능적 특성, 구매적 특성이 고객만족에 영향을 미치는 것으로 나타났다. 아울러 스마트폰에 대한 고객만족은 재 구매의도에 영향을 미치는 것으로 나타났다.

• 복식
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• 제57권3호
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• pp.23-36
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• 2007

It is important that ubiquitous technology changes paradigm of thought, not simple definition in the 21st digital era. Characteristics of ubiquitous computing are pervasive, disappearing, invisible, calm through environment. As IT Technology develops, designers, computer scientists, chemists, performance artists cooperate in order to find out the best way to make desirable digital clothing in the future, with the merit of each part. Digital clothing defines clothes of new generation equipped computer, digital installations. Digital clothing design demands intercept of electromagnetic waves, light-weight and esthetic appearance, for it is attached high-technology equipment near body. The purpose of this study is to analyze design features of digital clothing according to ubiquitous characteristics. The methods of this study are documentary research of previous study and case study. In the theoretical study, ubiquitous characteristics are function-intensive by convergence, interactivity, embedded mobility and human & emotion-oriented attributes. Based on ubiquitous characteristics, digital clothing design classified function-intensive design by convergence, design for Interactivity and multi-sensible & emotion-oriented design, because embedded mobility is a basic element of ubiquitous environment. The early days digital clothing design is function-intensive design, and have esthetic appearances and design for interactivity increasingly. Recently digital clothing design is expressed multi-sensible and emotion-oriented design.

• 한국축산식품학회지
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• 제35권1호
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• pp.27-34
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• 2015

The ultrastructure in the beef muscle of the electro-magnetic resonance and air blast freezing during the frozen storage, and the changes in the quality characteristics after thawing were evaluated. The size of ice crystal was small and evenly formed in the initial freezing period, and it showed that the size was increased as the storage period was elapsed (p<0.05). The beef stored by the electro-magnetic resonance freezing showed the size of ice crystal with a lower rate of increase than the air blast freezing during the frozen storage. The thawing loss of beef stored by the electro-magnetic resonance freezing was significantly lower than the air blast freezing during frozen storage (p<0.05), and it showed that the thawing loss of the round was higher than the loin. Water holding capacity decreased as the storage period became longer while the electro-magnetic resonance freezing was higher than the air blast on 8 month (p<0.05). As a result of sensory evaluation, the beef stored by the electro-magnetic resonance freezing did not show the difference until 4 months, and it showed higher acceptability in comparison with the beef stored by the air blast freezing. Thus, it is considered that the freezing method has an effect on the change in the ultrastructure and quality characteristics of the beef.

• 한국융합학회논문지
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• 제9권2호
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• pp.313-322
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• 2018

최근 사회 현상으로 부각되고 있는 키덜트 문화를 유형별로 큐티즘 키덜트, 판타즘 키덜트, 메모리즘 키덜트 3가지로 분류하고 각각의 특징을 분석한 후 독창적이고 창의적인 네일아트 융합 디자인을 제시함으로써 네일아트의 디자인 영역을 확대하고자 하는데 목적이 있다. 이를 위해 학위논문, 전문서적, 인터넷 자료 등을 조사하여 키덜트 유형별 특징과 디자인 사례를 분석하였고, 분석한 내용을 기초로 키덜트 유형별 특징을 활용하여 독창적이고 창의적인 네일아트 융합 디자인 작품을 제작하였다. 연구결과 큐티즘 키덜트는 귀여움, 화려함, 캐릭터 차용, 판타즘 키덜트는 상상의 가치, 판타지, 메모리즘 키덜트는 추억 회상, 캐릭터 차용으로 특징이 분석되었다. 이러한 키덜트 유형별 특징을 네일아트 디자인 6 작품을 제작하였으며, 이를 통해 문화현상을 기초로 한 네일아트 디자인의 독창성과 다양한 표현성을 확인할 수 있었다.

• 대한방사선기술학회지:방사선기술과학
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• 제42권4호
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• pp.291-299
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• 2019

The International Electrotechnical Commission (IEC) has regulated the definition and requirements of the exposure index (EI). In this study, we calculated the EI of several image receptors in digital radiography system of two different manufacturers according to the method as per IEC, and evaluated the relationship with incident air kerma. To calculate the EI, w e obtained the characteristics curve of each image receptor by increasing the incident air kerma at RQA 3, 5, 7 and 9, respectively. As a result, there was no significant difference in the EI values between different image receptors of the same manufacturer, but EI values of different manufacturer was different despite the same air kerma was incident. Therefore, understanding the characteristics of the digital radiography systems is important in order to use EI as a tool for measuring and managing the radiation dose.

• 복식
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• 제65권2호
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• pp.33-47
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• 2015

The purpose of this study is to understand the ideas of characteristic of convergence design related to slow fashion design. Convergence design in digital stage can be defined as a social phenomenon which different function of product move toward one direction for greater efficiency. Slow fashion is based on the Slow Movement. (This is a movement with similar principles to the Slow Food Movement, as it promotes an alternative mass production, such as fast fashion.) The aims of this research are to study slow fashion that has appeared in the fashion industry through various approaches for convergence designs, and to find the possibility of use for slow fashion. The research method consisted of carrying out case studies and analyzing literatures and proceeding cases. The characteristics of convergence designs are classified into technical convergence, emotion-oriented convergence and complex convergence. Technical convergence has an effect on slow fashion as a multi-functional design. Second, emotion-oriented convergence affects social-cultural design. Slow fashion related to a complex convergence design reveals emotion-oriented deign. Slow fashion is related to convergence design is to expect contribute to provide a good source for the future fashion industry and fashion market.

• 한국세라믹학회지
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• 제52권1호
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• pp.23-27
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• 2015

Recently, the use of ion-exchange strengthened glass has increased sharply, as it is now used as the cover glass for smart phone devices. Therefore, many researchers are focusing on methods that can be used to strengthen ion-exchange glass. However, research on how the improved strength can be maintained under thermal environment of device manufacturing is still insufficient. We tested the degradation of the characteristics of ion-exchange soda-lime glass samples, including their surface compressive stress characteristics, the depth of the ion-exchange layer (DOL), flexural strength, hardness, and modulus of rupture (MOR) values. Degradation of the characteristics of the ion-exchange glass samples occurred when they were heat-treated at a temperature that exceeded $350^{\circ}C$.