• Journal of Korea Multimedia Society
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• v.14 no.8
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• pp.1020-1028
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• 2011

In this paper, we proposed a mechanism that prevents indiscreet use of digital contents, verifies created content's copyrights to provide services to granted user and protects digital contents by law by authenticating the original digital content whenever an infringement of copyright occurs in UCC environments. The proposed mechanism uses specific information and features of contents as copyrights authentication information without additional information. Also, provides the fact of violation by inferring the modification of the original digital contents. That means this mechanism infers same or similar value from the contents; fraudulent use of content, modification of content color, modification of content format, modification of content resolution and illegal use of frame not principal key frame. In that point, we found that the inferred value from the content differed according to features of content modification.

• Journal of the Korean Graphic Arts Communication Society
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• v.24 no.1
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• pp.23-34
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• 2006

Color reproduction is one of the most important expression factors in digital printing. In this paper, an experiment was done where the characteristics of color reproduction in digital printing. The results could summarized as follows. The printing used device profile showed a color difference of less than printing used default value in digital printing. As a result of weighting color difference, a difference between color gamut of digital original and color gamut of printing, when transforming the RGB color space to CMY color space, a exclusion the gray revision. The solution is to optimize the color transformation by gamut mapping and gray revision.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2007.02a
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• pp.35-39
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• 2007

We applied digital image processing about BitMap file structure in this research and studied about digital communication system. digital record saving devices can express 'High' and 'Low' as all data. Only, digital technique that two expression methods is used into several expenditures. People and communication that are far away by development of digital technology, became smooth. We wished to make communication system taking advantage of digi-tech. This system was made for communication with disabled and normal person specially. To communication method that we are studied such BitMap file handling image communication system. The goal of this contribution is to present the overview of basic algorithms for image processing using BitMap.

• Journal of the Korean Society for Library and Information Science
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• v.35 no.3
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• pp.117-133
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• 2001

This study presented the necessity of the development of a digital reference service systems as a method for direct information service in the library on the internet. The purpose of this research is to find commonalities for building a model of digital reference service. This study used qualitatives methods(elite interviews and document analysis) to extract accumulated knowhow from fourteen expert services sites which are similar with reference services in the library. For effective management of the digital reference service, it is necessary to have a digital reference service librarian who is well versed in the inner workings of the service and in the knowledge the service deals with.

• Journal of the Korean Society for Library and Information Science
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• v.35 no.2
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• pp.23-40
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• 2001

Digital technologies we used increasingly for information production. storage, and distribution. This study provides an overview of the background and related issues for preserving digital informations in the long-term including technical, economic and national concerns for the digital archive. Selection, identification, preservation, and maintenance components of the digital archive is be investigated.

• Journal of the Korea Society of Computer and Information
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• v.24 no.7
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• pp.71-78
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• 2019

This paper describes a design for a RF receiver to receive satellite digital audio service. The RF receiver designed in this study is a planar structure that is easy to install on the rooftop of a car and is compact in size. In addition, it can be applied to certain commercial models because it has low noise and high gain characteristics. The impedance bandwidth of antenna is 17.8%(415MHz), and the axial ratio is below 3dB as good properties for the bandwidth of 40MHz which is a satellite digital audio service band. Also, it had a broad radiation beamwidth of $95.41^{\circ}$ in H-plane and $117.45^{\circ}$ in E-plane. From the results of the field test of satellite digital audio service reception for the RF receiver, it demonstrated good C/N rate(10.2dB).

• The Korean Journal of Archival Studies
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• no.63
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• pp.5-36
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• 2020

The E-government Act is in the complete revision process to promote the digital information preservation of the administrative information systems although the preservation of digital information in public sectors is now being regulated by the Public Records Act. In this challenging situation reconstruction of the public records policies has become a task that can no longer be delayed. The current public records policies are insufficient to manage various forms of digital information. The purpose of this study is to suggest the directions of the public records policies in digital transformation era. To this end, it analyze the recent changes in public records policies in the U.K. and Australia as leading models. The analysis derives four trends such as; i) extending management policies from declared records to all information, ii) adopting digital continuity policy, iii) managing information as records asset, and iv) establishment of information governance systems at national level.

• Journal of Korean Society for Geospatial Information Science
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• v.1 no.2 s.2
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• pp.83-96
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• 1993

The orthophto map is seen as the form of picture with the uniform reduced scale as the current terrain map. Thus it provides a reasonable feeling of scene and is easy to be interpreted. Furthermore, digital orthophoto is currently used as the basic terrain information data of the Geo-Spatial Information System(GSIS). Therefore, the orhtophoto map has high potential use as a future terrain map. This paper studies the method of producing orthophoto map by using the digital satellite imagery data taken from SPOT satellite of France. The production of orthophoto map requires the process of generating orthophoto imagery with digital elevation model, which process is called digital differential rectification. As the final accuracy of orthophoto map depends on that of digital elevation model, the precise and efficient production method of digital elevation model should be preceded. This study investigated the method of producing digital elevation model directly from SPOT satellite imagery and generated ortho-image by resampling the original SPOT imagery through digital differential rectification. Finally, Simple orthophoto map was made by overlaying the ortho-image and the contour map from digital elevation model.

• Journal of Korean Library and Information Science Society
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• v.52 no.4
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• pp.179-203
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• 2021

This study aims to grasp the key issues and the direction for digital divide research in South Korea. Based on the 488 KCI journal articles published between 2003 and 2020, the authors analyzed the changes in the number of articles per year and the subject areas of journals. Furthermore, the topic modelling and keyword network anlaysis were applied to identify the subjects of research. The main findings can be summarized as follows: first, there was a stable trend for a while after the number of articles had increased by the year of 2007, and then there has been a sharp increase since 2019. Second, digital divide research has been conducted from diverse fields including social science, multidiscipline, and engineering. Third, the six subject areas were identified which are 'digital divide among regions', 'digital divide among people with disabilities', 'technical environment of digital divide', 'divide from information use and its consequence', 'legal and institutional environments of digital divide', and 'digital divide of the elderly'. Finally, it was shown that the areas of 'divide from information use and its consequence' and 'technical environment of digital divide' have attracted attention recently.

• Asia pacific journal of information systems
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• v.13 no.4
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• pp.97-118
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• 2003

The Internet provides a new way of doing business, but ease of copying and of sharing valuable digital information illegally across the Internet undermine many viable business models. This paper investigates the Digital Rights Management(DRM) as a means to provide safe protection and proper delivery of digital contents through the Information highway. First, we briefly summarize the current endeavor of DRM technical development and standardization process held in key technical working groups. Then, the paper provides a generic architecture for a DRM framework and shows the implementation of a prototype of DRM system incorporating key conceptual and technical standardization development. This study emphasizes the importance of developing the DRM architecture that provides the proper protection and safe transformation of digital contents in electronic commerce.