• Smart Structures and Systems
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• 제4권2호
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• pp.123-135
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• 2008

Damping capacity of SMA damping devices is simulated numerically under distinct geometry and loading conditions. Two-dimensional numerical simulations are performed on the basis of a phenomenological model of dynamics of martensite-austenite phase boundaries. Results of the simulations predict the time delay and the value of the stress transferred to other parts of a construction by a damper device.

• 한국디지털정책학회:학술대회논문집
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• 한국디지털정책학회 2003년도 창립학술대회
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• pp.403-415
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• 2003

This study is performed to examine the relationships between trust and antecedents in cyberspace. Trust is the major control system in cyberspace. Different time, different spaces, different cultures, indistinct boundaries, flexible structure, separation of information from matters, cybernetics, difficulty of control are differential characteristics between cyberspace and physical space. Providing fit information, use of effective electronic channels, previous trust management, feedback system about output, flexible culture, self-regulation, off-line meeting, providing information about tasks and roles, ability, and justice are supposed to have effects on trust in cyberspace. By electronic mediated systems, the company will have more business opportunity. But trust will be conditional factors of expanding business in cyberspace.

• Korean Journal of Radiology
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• 제23권9호
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• pp.931-934
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• 2022

• 정보처리학회논문지:소프트웨어 및 데이터공학
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• 제2권7호
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• pp.443-450
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• 2013

최근 높은 휴대성과 이동성을 특징으로 하는 모바일 도메인에서 사용자의 상황정보를 이용한 모바일 상황인식 서비스에 대한 관심이 증대되고 있다. 모바일 상황인식 서비스들은 사용자의 상황정보를 모바일 기기로부터 수집 및 분석하여 추론 시스템을 통해 상황을 추론해야 한다. 그러나 모바일 도메인의 높은 이동성으로 인해 상황에 적합한 추론 결과를 얻기에 어려움이 있다. 또한, 잘못된 추론 결과를 수정 및 적응하기 위한 체계적인 방법에 대한 연구가 부족하다. 본 논문은 이러한 문제점을 개선하기 위해 소프트웨어 사이버네틱스 기반 피드백 개념을 적용한 체계적인 프로세스 모델을 제시한다. 또한 피드백 프로세스 모델을 적용, 설계 및 구현한 MADA(Monitoring, Analysis, Determinating, Adaptation) 프레임워크를 제시한다. 이를 통해 정확한 상황 추론이 가능한 적응적 모바일 상황인식 서비스 개발 환경을 구축할 수 있으며 추론 규칙의 체계적 관리가 가능하다.

• 한국안광학회지
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• 제11권2호
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• pp.85-89
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• 2006

렌즈 절삭공구의 기계적 특성을 향상시키는 기구에 관한 연구를 하기 위해, 탄화규소와 탄화티타늄을 주재료로 사용되었다. 또한, 소결첨가제로 알루미나와 이트리아를 첨가하였다. 첨가제 조성비는 알루미나와 이트리아비를 1:1로 유지하였다. 이를 $1810^{\circ}C$에서 1시간 일축가압 소결 후 $1860^{\circ}C$에서 3, 6 그리고 12시간 동안 열처리하였다. 열처리 시간이 길어질수록 입자크기는 점점 증가하였다. 미세구조는 주사전자현미경으로 관찰하였으며 이미지프로그램(Image-Pro Plus, Media Cybernetics, Maryland, U.S.A.)으로 상분석 하였다. 파괴기구는 주로 길게 자란 탄화규소 입자에 의한 균열회절에서 일어나고 있음을 알 수 있다. 균열회절기구에 영향을 미친 SiC입자들은 대부분 두께가 $2.3{\mu}m$ 이하였고, 장경비는 2.5 이상이었다. 균열가교도 일부 파괴인성 증진기구에 기여함을 알 수 있다.

• Journal of Microbiology and Biotechnology
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• 제33권10호
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• pp.1384-1389
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• 2023

This work aimed to evaluate the feasibility of biohydrogen production from Barley Straw and Miscanthus. The primary obstacle in plant biomass decomposition is the recalcitrance of the biomass itself. Plant cell walls consist of cellulose, hemicellulose, and lignin, which make the plant robust to decomposition. However, the hyperthermophilic bacterium, Caldicellulosiruptor bescii, can efficiently utilize lignocellulosic feedstocks (Barley Straw and Miscanthus) for energy production, and C. bescii can now be metabolically engineered or isolated to produce more hydrogen and other biochemicals. In the present study, two strains, C. bescii JWCB001 (wild-type) and JWCB018 (ΔpyrFA Δldh ΔcbeI), were tested for their ability to increase hydrogen production from Barley Straw and Miscanthus. The JWCB018 resulted in a redirection of carbon and electron (carried by NADH) flow from lactate production to acetate and hydrogen production. JWCB018 produced ~54% and 63% more acetate and hydrogen from Barley Straw, respectively than its wild-type counterpart, JWCB001. Also, 25% more hydrogen from Miscanthus was obtained by the JWCB018 strain with 33% more acetate relative to JWCB001. It was supported that the engineered C. bescii, such as the JWCB018, can be a parental strain to get more hydrogen and other biochemicals from various biomass.

• 복식문화연구
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• 제6권2호
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• pp.55-65
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• 1998

Actually, Cyberpunk is a compound word joined by cybernetics, which was used in control theory, and punk, was symbolized as anti-culture. Today, however, the definition of the term has been extended by various fields, used in many meanings. Therefore, the purpose of this study was to apply the Cyberpunk concepts to understand today　s fashion because understanding of the present fashion is a means to interpret our culture. For this purpose, the phenomenon of Cyberpunk in fashion was subdivided into three factors material, color, and style. The results of the study were as follows : First, the materials used were techno material, special print by computer for future feeling and geometrical pattern, optical pattern to improve visual effects. Second, the colors mainly used were silver, black and white, bright color, and off-color of computer animation to present future-oriented feeling. Third, the general styles used were fit and slim, simple and liner, dualistic style to express future　s image. In conclusion, the phenomena of Cyberpunk in fashion were expressed in material, color and style of fashion. Cyberpunk fashion was evident in T-shirts, sweaters, jackets, or as items of ornamentation such as pins, pendants, belts, and earrings, etc.

• International Journal of Fuzzy Logic and Intelligent Systems
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• 제2권1호
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• pp.65-69
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• 2002

The main drawback of “classical”fuzzy systems is the inability to design and maintain their database. To overcome this disadvantage many types of extensions adding the adaptivity property to those systems were designed. This paper deals with one of them a new hybrid adaptation structure, called gradient-incremental adaptive fuzzy controller connecting gradient-descent methods with the so-called self-organizing fuzzy logic controller designed by Procyk and Mamdani. The aim is to incorporate the advantages of both Principles. This controller was implemented and tested on the system of LEGO robots. The results and comparison to a ‘classical’(non-adaptive) fuzzy controller designed by a human operator are also shown here.

• 한국실내디자인학회논문집
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• 제23호
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• pp.26-33
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• 2000

The ideas of cyberspace and bio-mechanic hybrid architecture which has been made in conjunction with the electro-mechanic environment and human body as an organic body are newly illuminated in the main stream of contemporary architecture. This study aims at the analysis of the expression of the image of cyborg as a hybrid of an organic body and machine after modern era and its methods of application to arthitectural design. The results are as following: Cyborg is a hybrid of human and machine that is made according to the principle of cybernetics, and is a kind of bachelor machine in the late 20th century. The cyborg images in modern architecture were expressed as prosthetic object-machine, organic image, pataphysical machine. The cyborg images in contemporary architecture are expressed as auto-control function, organic machine, cyberspace.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2004년도 SMICS 2004 International Symposium on Maritime and Communication Sciences
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• pp.74-76
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• 2004

It is the new promising method of obtaining the information about the state of a surface of a solid body, thin and multilayer structures. An idea of the method consists in reading and analyzing the relations U(t), dU/dt(t), dU/dt(U) on an electrical cell when anodizing an investigated object. By these relation it is possible to control the presence of impurities in the metal on the path of the anodization front, a structure and characteristics of the object being oxidized as well as of an oxide which is being formed during anodizing, the change in composition of the oxide layer, the thickness and composition of metallic and dielectric layers being a part of the layers boundaries.