• Journal of the Institute of Electronics Engineers of Korea SC
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• v.43 no.4 s.310
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• pp.1-10
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• 2006

This paper presents a development of a mobile sign language recognition system for daily communication of deaf people, who are sign dependent to access language, with hearing people. The system observes their sign by a cap-mounted camera and accelerometers equipped on wrists. To create a real application working in mobile environment, which is a harder recognition problem than lab environment due to illumination change and real-time requirement, a robust hand segmentation method is introduced and HMMs are adopted with a strong grammar. The result shows 99.07% word accuracy in continuous sign.

• Journal of Environmental Science International
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• v.23 no.12
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• pp.2121-2127
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• 2014

Analyzing the observational data of volcanic activities around the northern part of Korean peninsula, the odds of volcano eruption increases continuously. For example, the cumulative seismic moment and frequence observed near Mt. Baekdu show a sudden increased values. In this study, predicting the diffusion of volcanic ash for two cases were carried out by using interactive realtime simulator, which was developed during last 2 years as a research and development project. The first case is Sakurajima volcano (VEI=3) erupted in August 2013. The second case is assumed as the volcanic eruption at Mt. Baekdu (VEI=7) under landing circumstance of typhoon Maemi (August 2003) in Korean peninsula. The synoptic condition and ash diffusion for the two cases were simulated by WRF(Weather Research and Forecast) model and Lagrangian dispersion model, respectively. Comparing the simulated result of the first case (i.e., Sakurajima volcano) with satellite image, the diffusion pattern show acceptable result. The interactive realtime simulator can be available to support decision making under volcanic disaster around East Asia by predicting several days of ash dispersion within several minutes with ordinary desktop personal computer.

• Geotechnical Engineering
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• v.10 no.1
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• pp.83-102
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• 1994

Design practice of the preloading method, which is one of the most used ground improvement methods, includes quite complicated problems, especially when the draining facilities such as rand drain piles are to be considered. But, such complicated problems can be easily handled once an expert system is developed. The expert system is an interactive computer program which has just succeeded in commercial application. It is a new field of CAE(computer aided engineering), which has developed on application of geotechnical problems in recent years In this study, the expert system which gives practical assistance to engineers is developed by building the knowledge base for the preloading method with vertical drains. In this study, an expert system is built by using CLIPS as a development tool. And the expert system is developed under the workstation environment using UNIX OS.

• Journal of the Korean Society of Safety
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• v.12 no.1
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• pp.140-145
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• 1997

안전측면에서 볼 때 각종 유해위험물질 정보분석은 산업현장의 교육자료 및 기초자료로 활용할 수 있고 이러한 사전 교육을 통해 예비지식을 습득함으로써 유해위험물질로 인해 발생 가능한 사고를 미연에 방지할 수 있어 유용하다. 이로 인해 각종 유해위험물질 정보를 제공하고자 1994년 말에 한국산업안전공단에서 제시한 "화학물질의 위험특성 조사 및 MSDS의 제도화 연구 보고서"에서 물질안전보건자료(MSDS)를 검색하는 도스용 프로그램이 개발되었고 국내에서는 통신을 이용한 서비스로는 KISCO-NET의 물질안전보건자료를 검색하는 대화형 방식의 서비스가 있다. 최근 들어 국외에서는 하이퍼텍스트 포맷을 사용한 그래픽환경의 클라이언트 프로그램인 웹 브라우저(Web Browser)로 World Wide Web 서버에 구축되어진 물질안전보건자료를 검색하는 사이트(site)가 늘어나고 있다. 이는 웹 서버가 단순히 문서만 전송하는 것이 아닌 멀티미디어 서비스를 지원하고 있을 뿐만 아니라 그래픽 환경의 클라이언트 프로그램으로 자료의 검색이 손쉽다는 점에서 웹상의 데이터 베이스화는 늘어가고 있는 추세이다. 하지만 현재까지 국내에는 물질안전보건자료를 웹상에서 검색할 수 있도록 한 웹 서버 구축사례는 없다. 따라서 1995년 초부터 작업을 시작하여 물질안전 보건자료를 검색하는 웹 서버를 국내에서 처음으로 구축하였으며 현재 거의 완성단계에 이르러 시범운전을 하고 있다.운전을 하고 있다.

• Journal of the Korean Home Economics Association
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• v.44 no.2 s.216
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• pp.113-126
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• 2006

This study aimed to examine the relationship between sexual communication and marital quality. Study data were collected from structured questionnaires completed by 695 married men and women aged in their 30s and 40s. The major results were as follows. For the interaction coordination and postsexual interaction, there were significant differences between men and women, in that men had more interaction coordination and postsexual interaction than women. The results show the stereotype of sexuality in Korean society that men should be more active, and assertive while women should be passive and dependent. For both men and women, those who had more dyadic sexual communication, more interaction coordination, and more postsexual interaction had a higher level of marital quality. That is, sexual communication can function significantly in increasing marital quality. The study results suggest the necessity of training to improve sexual communication skills. For example, in educational programs for couple enrichment, it will be useful to include skills such as expressing ones' desire, affect, and feelings explicitly.

• The Journal of Korean Medicine
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• v.18 no.2
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• pp.82-96
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• 1997

In order to investigate the effect of Daewhajungeum on the isolated organs, gastrointestinal tract and C.N.S., some kinds of experiments using mice and rats were done. The results were as follows; 1. Daewhajungeum showed the inhibitory effect on the smooth muscle contraction of the isolated ileum and colon induced by acethylchorine chloride and barium chloride in mice. 2. Daewhajungeum showed inhibitory effect on the contraction of the fundus-strip induced by acethylchorine chloride and barium chloride in rats. 3. The preventive effect on pyloric ulcer, indomethacin induced ulcer and ethanol-HCl induced ulcer of mice was recognized. 4. The effect on the acidity of gastric juice was suppressed, but the effect on the pepsin output was not recognized. 5. The transport ability of small and large intestine was significantly decressed. 6. The analgesic effect and the sedative effect were recognized so that the effect of the C.N.S was suggested.

• Proceedings of the Korea Contents Association Conference
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• 2005.11a
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• pp.170-174
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• 2005

It is projected that, in a near future, our living environment will transform into the ubiquitous computing environment. Many scenarios and projections of how humans will actually interact with such an environment to receive various services have been made, but most of them remain to be untested ideas on paper without implementation. In this paper, we propose to use P-VoT, a component based interactive authoring toolkit for virtual environments, to quickly build a virtual ubiquitous computing environment.

• Journal of the Korean Operations Research and Management Science Society
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• v.17 no.3
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• pp.67-78
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• 1992

MODM (multiobjective decision-making) problem is very complex system for the analyst. The problem is more complex if the goals of each of the objective functions are expressed imprecisely. It requires suitable MODM method to deal with imprecisions. Therefore, we present a new interactive fuzzy decision making method for solving multiobjective nonlinear programming problems by assuming that the decision maker (DM) has imprecise goals that assume fuzzy linguistic variable for each of the objective functions. The imprecise goals of the DM are quantified by eliciting corresponding membership functions through the interactive with the DM out of six membership functions. After determining membership functions, in order to generate the compromise or satisficing solution which is .lambda.-pareto optimal, .lambda.-max problem is solved. The higher degree of membership is chosen to satisfy imprecise goals of all objective functions by combining the membership functions. Then, the values are the compromise or satisficing solution. On the basis of the proposed method, and interactive computer programming is written to implement man-machine interactive procedures. Our programming is a revised version of sequential unconstrained minimization technique. Finally, a numerical example illustrates various aspects of the results developed in this paper.

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.5
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• pp.487-491
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• 2008

This paper proposes the Byzantine fault tolerant clock synchronization scheme for wireless sensor networks to cope with the clock synchronization disturbance attack of malicious nodes. In the proposed scheme, a node which is requiring clock synchronization receives 3m+1 clock synchronization messages not only from its parent nodes but also from its sibling nodes in order to tolerate malicious attacks even if up to m malicious nodes exist among them. The results show that the proposed scheme is 7 times more resilient to the clock synchronization disturbance attack of malicious nodes than existing schemes in terms of synchronization accuracy.

• Journal of Korea Multimedia Society
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• v.8 no.9
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• pp.1239-1247
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• 2005

Basically, objects are discriminated by transfer functions in volume rendering . However, in some cases objects cannot be discriminated only with transfer functions. In these cases, objects are pre-segmented with other methods, and visualized based on the segmentation information. In this paper we present a way of assigning per-object transparency in visualization of segmented volumes. Semi-transparent rendering is used to effectively give context information about the observed object. Per-object transparency can be used as a very effective visualization tool especially when it is difficult to adjust transfer functions to make the object semi-transparent. We present several interpretations of the meaning of per-object transparency, and corresponding variations of the algorithm. We show that efficient implementations for interactive use are possible, by presenting an implementation using general graphics hardware.