• Journal of the Korean Society for Library and Information Science
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• v.32 no.4
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• pp.141-157
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• 1998

The purpose of this study is to increase the effective utilization of library homepages by providing design guidelines. Seven of the library homepages are selected and have their menus of library homepages do share Each library homepage has it's own distinct characteristics, however the library homepages do share five common services : User Service. OPAC, CD-ROM Search, DB Search, Related Sites, Other Services. The result of this study can be used as the basic data for researching of library homepage's interface designs and collection development of electronic information.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1996.06a
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• pp.187-190
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• 1996

본 논문은 고속의 프랙탈 영상압축 기법으로 알려져 있는 Bath 프랙탈 영상 압축 기법의 성능을 여러 가지 측면에서 분석한다. Bath 프랙탈 영상 압축 기법은 영상의 빠른 복호화가 가능하므로 미래의 다양한 형태로 요구되는 정보서비스, VOD(Video On Demand), CD-ROM 등과 같이 저장되어 있는 영상 정보의 빠른 복원이 요구되는 곳에 적합한 부호화 기술이므로 그 성능에 대한 분석이 중요하다. 본 논문에서는 Bath 프랙탈 압축 기법의 양자화 방법에 따른 성능 분석, 프랙탈 계수 값의 분포에 따른 성능 평가, 사용된 어핀 맵핑식에 따른 성능 비교, 영상내의 에지 빈도수에 따른 성능 변화, 쿼드트리 구조의 작은 블록들에 대한 BFT의 성능 평가 등을 고찰한다.

• Proceedings of the IEEK Conference
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• 2000.09a
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• pp.819-822
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• 2000

최근 유아기 아이들을 위한 교육매체의 발달로 각종 CD-ROM이나 테이프 등에서 성우의 목소리로 동화를 읽어주는 시스템이 많이 나와 있고, 또한 Web Book이 점차적으로 보편화가 되 가고 있다. 하지만 이런 획일적이고 균일화된 매체들은 아이들에게 금새 실증을 내게 하기 때문에 흥미 유발을 위해 동화의 주인공을 자기자신이나 친근한 사람의 이름 등으로 바꾸어 발성해 준다면 더욱 친근감 있게 받아들일 것이다. 본 논문에서는 기존의 성우가 발성하는 동화의 주인공 이름을 Test화자가 새로운 이름으로 발성을 해주면 기존 성우의 목소리패턴으로 바꾸어 동화를 읽어주는 시스템에 대해서 제안하고자 한다. 우선 Test화자가 발성한 목소리를 성우의 목소리로 바꾸어 주기 위해서 기존의 성우가 발성한 동화주인공 이름과 Test화자가 발성한 이름과의 운율패턴을 비교하여 성우의 운율패턴에 일치시키고 성우의 목소리 패턴으로 변경된 새로운 주인공의 이름만을 기존의 동화 DB에 삽입하였다. 또한 에너지 패턴조절은 기존의 성우가 발성한 기준패턴에 근사화 시켰고 끝점을 스므딩 시킴으로써 자연스런 발성이 되게 만들어주었다. 결과적으로 Mos Score가 3.873로 비교적 좋은 결과를 얻을 수 있었다.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.20 no.41
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• pp.189-196
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• 1997

Multimedia systems present information by various media, for example, video, sound, music, animation, movie, etc., in addition to the text which has long been used for conveying the information. But using several media may cause users' confusion and poorly designed user interface often aggravate the situation. Hypermedia systems allow the retrieval and representation of multimedia information using navigation and browsing mechanisms. Typically, there are two major navigation problems in a hypermedia compared to the ordinary user interface: disorientation and cognitive overload. In this study, the multimedia system was studied from the viewpoint of usability. Practical usability evaluation needs cost-effective, low-skill, and low- investment methods. The 'discount usability engineering' method, one of these methods, is based on the use of the following techniques: scenarios, simplified thinking aloud, and heuristic evaluation. The discount usability engineering method was applied to the usability evaluation of multimedia CD-ROM title.

• Journal of the Korean Institute of Intelligent Systems
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• v.7 no.1
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• pp.27-33
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• 1997

This project is dedicated to the elaboration of a man-machine system for monitoring the non spread of nuclear weapons, technologies, raw materials. The main purpose of such a system depends on the customer requirements and may be : - control of non proliferation of nuclear technologies, especially those that can be used to manufacture a nuclear explosive device; - the appraisal of the possibility of production of nuclear weapons by a certain country on the basic of its intellectual and scientific-technical potential, its raw material resources, its export-import potential and other parameters.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.14 no.1
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• pp.10-16
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• 2004

There are a lot of roots of errors in a motion of the optical pick-up actuator being one of the most significantcomponents in a CD-ROM drive. Most of the studios recently performed have a tendency to seek for the causes from an actuator itself. This paper presents dynamic characteristics of an actuator affected by the motion of a feeding deck. The feeding system is modeled as a rigid body with eight degree-of-freedom. Using Largrange's equation, we derive linear equations of motion with respect to the rectangular coordinate. We found that the ranges of the natural frequencies of a feeding deck and the actuator are close to each other. The time responses are also computed by the Newmark method and Runge-Kutta method. The result show that it is important effect to consider feeding deck in modeling and designing an optical pick-up.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.11a
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• pp.144-149
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• 2006

최근 저소음형 fan 의 도입과 컴퓨터 케이스의 설계 변경 등으로 컴퓨터 소음이 저감되어, HDD 나 CD/DVD-ROM 등에서 발생하는 협대역 소음들이 문제가 되기도 한다. 특히 HDD 의 소음은 회전 속도의 증가와 휴대용 컴퓨터나 외장 HDD와 같이 사용자에 근접한 환경에서 사용되는 빈도가 높아짐에 따라 소음제어에 대한 관심이 증가되고 있다. 본 연구에서는 HDD 소음 분석 및 제어에 적합한 방법론 정립을 위한 음향/진동 분석이 수행되였다. 먼저 음압과 음향 파워, 진동속도를 측정하여 각 면의 기여도와 문제가 되는 주파수 대역을 선정하여 그 원인이 무엇인지를 실험적으로 찾아내고, 소음저감을 발안을 제시하였다. 이러한 개선 방안들은 실험적인 방법으로 검증되었으며, 음향 진동 분석을 통한 소음원 파악 및 적절한 개선 방향의 설정은 향후 HDD 설계시 유용한 정보로 활용될 수 있을 것이다.

• Archives of design research
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• v.16 no.4
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• pp.375-384
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• 2003

Interactive storytelling is a scenario created "on the fly" with digital content through user interaction. Every time interaction occurs between the user and content, a brand new story is created. Interaction intrigues people because it provides different story from same content. Through conventional media, people shared same content and experience. However through interactive media, people encounter unique experience, over same content possibly everytime they use it. People we, by their nature, very interactive being. However, interacting with media is not an activity that people are accustomed to. Hence, designing content has been all migrating experience from existing media to an unfamiliar ground. Unique and adoptive ways of designing content for digital interactive media is being sought out from the need as the result of the evolution of integrated society and emerging information technology. People are already used to some of interactive storytelling through hyper text in CD-ROM and web sites. More complicated and different structured models were born through games that offered graphics, virtual spaces and interactivity. When drawn onto a structural graph, few attributes and similarities seem to occur. This paper will try to outline and discuss structural graphs of interactive storytelling methods and suggest some ways for better storytelling design.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.92-97
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• 2002

There are a lot of roots of errors in an motion of the optical pick-up actuator being one of the most significant components in a CD-ROM drive. Most of the studies recently performed have a tendency to seek for the causes from an actuator itself. This paper present the dynamic characteristics of an actuator affected by the motion of a feeding deck. The feeding system is modeled as a rigid body with eight degree-of-freedom. Using Largrange's equation, we derive the linear equations of motion with respect to the rectangular coordinate. We found the fact that the ranges of the natural frequencies of a feeding deck and an actuator are close to each other. And the time responses are also computed by the Newmark method and Runge-Kutta method.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.547-552
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• 2002

The purpose of this study is to propose indoor noise level in residential buildings affected by transportation noise (road traffic, railway and air-craft noise) based on subjective evaluations, 30 subjects participated in the experiment to evaluate the noise. Experimental environment reproduced real living and office environment, and in asking subjects' annoyance to the noise. An experiment to investigate the subjective responses to various computer noises (CD-Rom, HDD, Fan) in office environment was also undertaken. The Result shows that the lower limit of transportation noise is $40{\sim}41dB(A)$ and upper limit is $55{\sim}60dB(A)$, whereas the lower limit of various computer noises is $36{\sim}40dB(A)$ and upper limit is $45{\sim}52dB(A)$.