• Journal of the Korean Society for Library and Information Science
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• v.46 no.1
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• pp.99-117
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• 2012

Due to the recent technological improvements, the environments of e-books and its contents have been changed and the users of e-books have drastically increased. This study aimed to propose a model on how children access and search e-books in this digital era. For this study, a potential model was proposed based on the analyses on various information-seeking behavior models. For analyzing children's access and search processes on e-books, 30 children in five public libraries or school media centers in Seoul and Kyoungi-do areas were recruited for the in-depth interviews. As a potential model on children's access and search on e-books was re-visited and revised based on the results, a cyclic model of children's access and search on e-books was proposed containing six factors.

• Journal of Korea Multimedia Society
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• v.12 no.10
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• pp.1486-1498
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• 2009

Modem efforts on digitizing electronic books focus on preserving authentic image representation of the original sources. Unlike the text-based format, it is difficult to recognize the information in the image, so the new format requires new tools to help users to access, process, and make sense of digital information. This paper presents an approach which assists users of these image sources by giving them a combination of annotation and social navigation support. Especially in the education domain, the proposed technique improves the usability of online education system. This approach is currently fully implemented and under evaluation in a classroom study.

• Journal of Korean Library and Information Science Society
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• v.34 no.3
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• pp.317-343
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• 2003

The purpose of this study is to develop a general model for web-based children's literature education and to validate the model. Both qualitative and quantitative methods were used for the analysis of this study. The findings of this research were three point. At First, the model of web-based children's literature education have five major components i.e., objects, construction of activity, display of activity, management of it, and evaluation of it. At second, the creative writing was revealed the core of the web-based children's education. The third, web-based children's literature activity can be followed by cyber learning community activities.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.403-405
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• 2012

본 연구에서는 독서장애인을 위한 전자책용 어노테이션의 탐색 및 재생 기법을 제안하고 이를 음성 어노테이션 브라우징 시스템이라 칭하였다. 제안된 음성어노테이션 브라우징 시스템은 명령 입력, 중요도 분석 및 추천, 검색, 출력단계로 구성된다. 특히 본 연구에서는 대상 사용자가 청각 의존도가 높은 독서장애인들이기 때문에 완전히 청각에 의존해서 사용할 수 있도록 모든 단계에서 음성인식 기능을 제공한다. 제안된 음성 어노테이션 브라우징 시스템의 효율성을 검증하기 위해 안드로이드 환경에서 실행되는 전자책 소프트웨어와 음성 어노테이션 브라우징 시스템을 설계하고 구현하였다.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.39 no.1
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• pp.32-39
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• 2002

Vector quantization for image compression needs expensive encoding time to find the closest codeword to the input vector. This paper proposes a search algorithm for fast vector quantization encoding. Firstly, we derive a robust condition based on the efficient topological structure of the codebook to dramatically eliminate unnecessary matching operations from the search procedure. Then, we Propose a fast search algorithm using the elimination condition. Simulation results show that with little preprocessing and memory cost, the encoding time of the proposed algorithm is reduced significantly while the encoding quality remains the same with respect to the full search algorithm. It is also found that the Proposed algorithm outperforms the existing search algorithms.

• The Korean Publising Journal, Monthly
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• s.143
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• pp.4-5
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• 1994

신중하며 충분한 논증을 거친 자료적 탐색이 있으며, 왜 그렇게 보고자 했는가에 대한 전자의 관점이 명백히 설명되는 저술들 속에서 위대한 천재들의 창조적 업적을 이해할 수 있다면 이보다 좋은 독서는 달리 없다. 인물전기는 고정된 목록에서 벗어나 보다 의외적인 접근을 보이는 책을 읽는 것이 시야도 넓히고 생각의 깊이도 더해준다.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.41 no.4
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• pp.63-67
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• 2004

The conventional typical techniques as fast codebook generation methods are PDS, FNNS, and FC. In this paper, we propose FCNNPDS integrated the conventional methods to generate a codebook. The results of simulations show that the computational magnitude of FCNNPDS is reduced to 40-95% lower than conventional techniques. But comparison computation has no relation with k dimension of vectors, that is, because the computational magnitude of comparison is smaller than others, therefore FCNNPDS may be the best method than the conventional methods.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.18 no.8
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• pp.1213-1225
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• 1993

Hypermedia systems have the browsing mechanism using links and provide navigation tools to retrieve and represent multimedia information. In this study we designed and implemented a hypermedia system which has the hierarchical group and local map for effective navigation. We also propose the clustering mechanism which constructs a cluster tree and uses this knowledge for navigation. The system has been designed to integrate the browsing and searching function of the hypermedia system for efficient multimedia information retrieval and user-interface. This system can be used to develop hypermedia application systems in the area of encyclopedia, reference document information, electronic dictionary and electronic book.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.8
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• pp.3389-3404
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• 2012

Based on the case study methods, the study analyzes emergence and ensuing typology of global ebook platforms such as Google eBook, Amazon Kindle, iBooks Store. Global ebook platforms show adaptation process responding to rapidly changing digital technological envirment and it's fitness landscape. The critical elements in its emerging process are the distinct selection criteria, the degree of resource abundance and the search process based on open innovation. Based on these critical elements, the global platforms show speciation process, so called niche creation and are evolving into a variety of the typology based on the initial condition of key resource which makes the platform emerge and grow. Each global ebook platforms is evolving into open platform, hybrid platform, closed platform. Google eBook has openness and extensibility due to a variety of devices based on Android and a direct involvement of actors. Amazon Kindle has developed from a online bookstore and into the hybrid platform which have not only closed quality but also openness with ebook devices and mobile network. iBooks Store has developed into the closed platform through the agency model based on competitive hardwares and closed quality with iphone and ipad.

• Journal of Korea Multimedia Society
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• v.16 no.4
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• pp.510-519
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• 2013

In this paper, we propose a voice-annotation browsing system that make the reading-disabled people to be able to find and play the existing voice-annotations. The proposed system consists of 4 steps: input, ranking & recommendation, search, and output. For the reading-disabled people depending only on the auditory sense, all steps can accept voice commands. To evaluate the effectiveness of our system, we design and implement an android-based mobile e-book application supporting the voice-annotation browsing ability. The implemented system is tested by a number of blind-folded users. As a result, we can see almost all the reading-disabled people can successfully and easily reach the existing voice-annotations they want to find.