• Annual Conference of KIPS
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• 2005.05a
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• pp.723-726
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• 2005

기존의 아바타 시스템에서는 아바타를 표현하기 위하여 GIF, VRML, Flash로 표현하였으나, GIF, VRML, Flash등의 파일들은 바이너리 파일 형태로서 사용자가 임의로 파일을 수정하기 위해서는 별도의 도구가 필요하다. 그러나, 확장 가능한 멀티플랫폼 아바타 시스템에 사용하는 기본 이미지 포맷은 텍스트 기반의 SVG로서 사용자가 웹 상에서도 별도 도구의 필요 없이 손쉽게 아바타 파일을 수정할 수 있다. 본 논문에서는 XML의 서브셋인 SVG 파일을 효과적으로 저장하기 위하여 확장 가능한 멀티플랫폼 아바타 시스템에 사용되는 SVG 파일을 분석하고, 그에 따른 최적의 성능을 발휘하는 SVG-Store를 설계 및 구현하였다.

• Bulletin of the Korean Chemical Society
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• v.20 no.6
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• pp.720-726
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• 1999

It has been proved by the semi-classical gauge invariant formulation (GIF) that the correct interaction operator for coupling the field-free material states with the radiation field must be the position form regardless of the gauge chosen for expressing the electromagnetic potentials, in accordance with the well-established principle of gauge invariance. The semi-classical GIF is now extended to the quantized radiation field interacting with matter by defining the energy operator for the quantized radiation field in the presence of matter. It will be shown in this paper that the use of the energy operator guarantees the position form of the interaction operator even in the Coulomb gauge, contrary to the conventional approach in which the dark material Hamiltonian is used to get the interaction operator of the momentum form. The multipolar Hamiltonian is examined in the context of the quantum mechanical gauge transformation.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2018.06a
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• pp.59-62
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• 2018

In this paper, we propose a contrast enhancement algorithm using guided image filter (GIF). The GIF is used to divide an HDR image into a base layer and a detail layer. The energy scale of base layer determinate the darkness and brightness of the image. However, the detail information in the base layer is difficult to be displayed because of the high brightness and clusters of low brightness. We propose a contrast enhancement method by adjusting the gray level of base layer by subtracting the mean value of itself. It is combined with the detail layer to preserve the detail information. Experiment results show that the proposed algorithm has better performance in detail preservation and contrast enhancement.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2018.11a
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• pp.59-60
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• 2018

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2019.05a
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• pp.39-40
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• 2019

• Journal of Korean Academy of Oral and Maxillofacial Radiology
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• v.26 no.2
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• pp.201-210
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• 1996

There is increasing attention about radiology teaching files on the Internet in the field of diagnostic radiology. The purpose of this study was to aid in the creation of new radiology teaching file by analysing the present radiology teaching file sites on the Internet with many aspects and evaluating images on those sites, using Macintosh IIci computer, 28.8kbps TelePort Fax/Modem, Netscape Navigator 2.0 software The results were as follow : 1. Analysis of radiology teaching file sites (l) Country distribution was the highest in USA(57.5％). (2) Average number of cases was 186 cases and radiology teaching file sites with search engine were 9 sites (22.5％). (3) At the method of case arrangement, anatomic area type and diagnosis type were found at the 10 sites(25％) each, question & answer type was found at the 9 sites(22.5％). (4) Radiology teaching file sites with oro-maxillofacial disorder were 9 sites(22.5％). (5) At the image format, GIF format was found at the 14 sites(35％). and ]pEG format found at the 14 sites(35％). (6) Created year was the highest in 1995(43.7％). (7) Continuing case upload was found at the 35 sites(87.5％). 2. Evaluation of images on the radiology teaching files (l) Average file size of GIF format (71 Kbyte) was greater than that of JPEG format(24 Kbyte). (p<0.001) (2) Image quality of GIF format was better than that of JPEG format. (p<0.001).

• The Transactions of the Korea Information Processing Society
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• v.7 no.3
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• pp.756-765
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• 2000

In this paper, a korean text to sign language translation system is designed and implemented for the hearing impaired people to learn letters and to have a conversation with normal people. We adopt the direct method for machine translation which uses morphological analysis and the dictionary search. And we define the necessary sign language dictionaries. Based on this processes, the system translate korean sentences to sign language moving picture. The proposed dictionaries are composed of the basic sign language dictionary, the compound sing language dictionary, and the resemble sign language dictionary. The basic sign language dictionary includes basic symbols and moving pictures of korean sign language. The compound sing language dictionary is composed of key-words of basic sign language. In addition, we offered the similar letters at the resemble sign language dictionary. The moving pictures of searched sign symbols are displayed on a screen in GIF formats by continuous motion of sign symbols or represented by the finger spelling based on the korean code analysis. The proposed system can provide quick sign language search and complement the lack of sign languages in the translation process by using the various sign language dictionaries which are characterized as korean sign language. In addition, to represent the sign language using GIF makes it possible to save the storage space of the sign language. In addition, to represent the sign language using GIF makes it possible to save storage space of the sign language dictionary.

• The KIPS Transactions:PartD
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• v.16D no.2
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• pp.257-264
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• 2009

The purposes of e-Government are to connect government agencies without boundary, and to deliver better quality e-services to citizens. The frontier countries try to reach the e-Government goals using Government Interoperability Framework(GIF). Even though Korea also has interoperability regulations, that is obscure. So we have some limitations to take the e-Government interoperability advantages. This study analyzes the cases of advanced countries (EU, U.S., U.K., and Australia), and reviews Korea's regulations. After that, we suggest EA based Korean e-Government Interoperability Framework(K-GIF), that is to manage the interoperability from business to information technology over the whole IT life cycle.

• Digital Contents
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• no.4 s.131
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• pp.116-119
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• 2004

이제‘플래시’란 제품을 모르는 사람이 없을 만큼 플래시는 웹 전반에 걸쳐 커다란 역할을 차지하고 있다. 이러한 플래시의 아성은 하루아침 에 이뤄진 게 아니다. 플래시의 역사를 되짚다 보면 지난 95년경까지 거슬러 올라간다. 당시는 인터넷이 대중들에게 막 알려지기 시작한 때 이며 인터넷에 좀더 역동적이고 화려한 콘텐츠가 등장하기를 원하던 때였다. 이때 플래시라는 혁명적인 툴이 등장했고, 무언가 움직임을 주는것은 GIF 애니메이션이 전부라고 생각하던 웹 사용자들에게 충격을 안겨 줬다.

• Bulletin of the Korean Chemical Society
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• v.12 no.5
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• pp.459-460
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• 1991