• Communications for Statistical Applications and Methods
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• v.4 no.2
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• pp.393-401
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• 1997

블록화한 $2^{n-k}$부분실시법에서 총 실헙횟수를 32회로 고정할때, 요인수가 ${6\leqq}n{\leqq10}$인 경우 가능한 모든 요인들간의 조합에 대해서 독립 생성자와 블록생성자를 구하고 이들 각 요인과 블록생성자로 구성된 디자인의 단어길이구조를 구하였다. 그리고 최소길이 방법으로 구한 최적의 부분실디자인을 Soren(1994a)의 방법에 따라 블록화하였다. Brownlee등(1948)의 최소길이 성질을 블록화한 부분실디자인에 확장시키고, 블록화한 부분실디자인은 확장된 최소길이 성질을 만족하는 최적의 디자인임을 보였다.

• Proceedings of the Korea Society of Design Studies Conference
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• 2003.11a
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• pp.84-85
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• 2003

• Proceedings of the Korean Statistical Society Conference
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• 2001.11a
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• pp.109-114
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• 2001

m=2 또는 n=2이고, ${\lambda}_1<{\lambda}_2$인 그룹분류가능계획을 매개디자인으로 사용한 완전이면교배가 A-최적, D-최적임을 보였다. 또한, ${\lambda}_2={\lambda}_1+1$이면 일반화된 최적계획이 됨을 보였다.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.45 no.12
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• pp.20-25
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• 2008

Codebook-based opportunistic beamforming (COBF) technique provides a beam selection diversity to the conventional opportunistic beamforming. In this paper, we design the random matrix and codebook for the COBF technique based on a kappa-factor channel model. Applying the proposed design to the COBF, nearly optimal beams are generated. Therefore, the COBF shows an outstanding performance without regard to the channel correlation related to the kappa-factor.

• Korean Journal of Construction Engineering and Management
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• v.17 no.2
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• pp.135-145
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• 2016

In Korea, a series of noise-reduced aluminum forms are being recently used in apartment housing construction. However, their complicated and time-consuming work processes, and the noise which is still generated due to the inherent property of aluminum when especially installing and dismantling them have been pointed out as a problem to be certainly solved for increasing their practical use in construction sites. The primary objectives of this study are proposing an optimal conceptual design of a newly designed noise-reduced aluminum form and verifying the technical feasibility by conducting a working mock-up drive experiment. Thus, conventional noise-reduced aluminum forms have been analyzed and three conceptual designs of a newly noise-reduced aluminum forms have been deducted. AHP has been applied to a survey data collected by interviewing field experts. A trade-off analysis results have shown that 'Noise-reduced System Aluminum Form with a Drop-down Floor Post and Adaptive Beam' the highest weights of safety(0.52), work convenience(0.54) and thus selected. The suggested conceptual design in this study improved problems of conventional system aluminum forms. It is also expected that the suggested design will be used as a reliable guideline for the actual development of an aluminum form that ensures noise-reduce, work convenience and labor safety.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.6
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• pp.814-820
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• 2009

The arrangement of the general 12-button cellular phone keypad is unified with one or two kind. In general, the several alphabets are arranged in one key. When inputting an English, countries which do not speak English use multi-tap method. We can input next alphabet by pressing key repeatedly. We address the problem of finding multi-tap-based keypad designs which minimize the number of key presses for various case. Genetic algorithms is proposed method for optimal keypad designs. We are to maintain the number of keys, which is ranged from 8 to 12. We also show experimental using non-alphabetically-constrained and alphabetically-constrained arrangement, respectively. Finally, we give improved keypad designs.

• Archives of design research
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• v.17 no.1
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• pp.127-134
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• 2004

The purpose of this study was to compare data input interfaces used in e-business applications on the web and find optimal input design characteristics. Basic data entry tools such as a pull down menu, list, text input box, and radio button were examined by inputting data into a simulated hotel room reservation web site. Experimental results indicated that the text input box was most efficient for experts or experienced operators when there are more than four menu-items and pull down menu was considered most satisfactory, simplest, and easier to use for novices or unexperienced users. A simple list was determined to be the best for the input of binary data considering user's satisfaction, simplicity, and flexibility but radio button was evaluated best for the ease to use. Design guide lines of this study can be applied to build a usable interactive web sites and increase economic efficiency.

• Journal of Service Research and Studies
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• v.8 no.1
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• pp.1-12
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• 2018

The current research investigates an optimal design for the service system, which refers to the entire process of implementing, providing, and utilizing wisdom assets. We analyzed the intrinsic commonality of wisdom assets and services, and carried out research based on optimality in fidelity to service essence. The essential characteristics of service are horizontality, interactivity, harmonization, and relationship. It is suggested that the operating process can be implemented in the best condition when the wisdom asset service system is designed based on the four essential characteristics of services. It has been demonstrated that the entire process of production, delivery, marketing and quality control of wisdom contents can be designed on the basis of the essence of wisdom and service. After designing a basic service model, detailed service models are presented. The purpose of this study was to solve the problems of the material civilization society which is suffering mentally and to design the social service model which is high in productivity but mentally healthy. By supplementing and deepening the results of this study, it will be possible to develop and implement desirable social service model in which all societies live a happy life.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.4
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• pp.231-237
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• 2011

Elicitation of design concepts is the most important process in web-site design, but it is not an easy task to average designers. In this paper, we have analyzed most of the good web designs and classified them into seven large categories mainly based on design elements. This framework will give a guidance to average designers to easily tackle the elicitation process of web design concepts.

• 한국공간정보시스템학회:학술대회논문집
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• 2007.06a
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• pp.324-328
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• 2007

텔레매틱스 분야에서 가장 널리 서비스되고 있는 내비게이션 시스템의 최신 동향은 주행중 운전자의 정보 인지를 쉽게 하도록 하는 것이다. 실감 내비게이션 기술은 운전자의 시야와 동일한 전방 영상을 카메라로부터 획득하여 운전자에게 필요한 정보를 그 위에 오버레이하여 직접 전달하는 기술이다. 이러한 실감 내비게이션을 위하여 기존 방식과는 다른 빠르고 효과적인 정보전달 방식이 필요하며, 어떤 정보를 사용자에게 어떻게 전달하느냐에 따라 다른 효과를 가져올 수 있다. 본 논문에서는 실감 내비게이션에서의 정보 표현을 위한 화면 배치, 가상객체의 디자인 안, 정보량의 적정수준 등 디자인 방향과 고려사항을 논의하고 사용자 평가에 의한 디자인 최적 대안을 제시한다.