• Journal of the Korean Society for information Management
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• v.36 no.3
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• pp.109-129
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• 2019

Since the recent financial crisis in universities has caused the decrease of academic library budget, the resource sharing has been considered by utilizing inter-library loan (ILL) data for solving the financial deficit. This study aims to identify the collection profiles of western monographs' ILL data among 4-year academic libraries. In order to achieve the purpose of this study, this study analyzes ILL data from 2011 to 2017 using the bibliographic data and ILL transactions of the KERIS union catalog. The findings of the study show that the western monographs was significantly provided by large-scale academic libraries in 2011, however, the extent of major regions expanded, and the number of influential institutions rose in 2016. Second, in 2012, the influence in the ILL network increased in the quantity of western monographs holdings and the proportion of common collections. On the other hand, in 2016, it was also shown that the influence in terms of provision in the ILL network increased in the proportion of unique collections. Lastly, the ILL participating academic libraries were classified into six clusters by a hierarchical clustering analysis of holdings and ILL indexes.

• Journal of KIISE
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• v.43 no.10
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• pp.1173-1178
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• 2016

Since the introduction of BitTorrent protocol in 2001, everything can be downloaded through file sharing, including music, movies and software. As a result, the copyright holder suffers from illegal sharing of copyright content. In order to solve this problem, countries have enacted illegal share related law; and internet service providers block pirate sites. However, illegal sites such as pirate bay easily reopen the site by changing the domain name. Thus, we propose a technique to easily detect pirate sites that are reopened. This automated technique collects the domain names using the google search engine, and measures similarity using Longest Common Subsequence (LCS) algorithm by comparing the tag structure of the source web page and reopened web page. For evaluation, we colledted 2,383 domains from google search. Experimental results indicated detection of a total of 44 pirate sites for collected domains when applying LCS algorithm. In addition, this technique detected 23 pirate sites for 805 domains when applied to foreign pirate sites. This experiment facilitated easy detection of the reopened pirate sites using an automated detection system.

• The Transactions of the Korea Information Processing Society
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• v.7 no.2
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• pp.321-327
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• 2000

Geographical Information System (GIS) is composed of hardware, software, data, and methods. Among the components, data is considered to be the most important factor in GIS. In this paper, we describes HVF, the most recent technology pioneered by GIS researchers. HVF is a format for efficient usage of spatial object in order to express, save and transform in Internet GIS. Fist, we describe the definition of HVF syntax, then the implementation of Header Section Generation Module and Main Section Generation Module through the API. Second, we develop a spatial object converter for HVF to transform figures into data structures, which are compatible among different GIS applications. For this purpose, we design and implement three units of modules, which are File Manipulation, HVF Import and HVF Export Module. Since the issues of network traffic and Hangul processing in Internet GIS are important, we expecially consider development of HVF in terms of spatial data size.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.23 no.5
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• pp.183-189
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• 2023

This paper proposes a new JPEG format, All-in-JPEG, which can include not only multiple photos but also various media such as audio and text by extending the JPEG format. All-in-JPEG add images, audio, and text at the existing JPEG file, and stores meta information by utilizing the APP3 segment of JPEG. With All-in-JPEG, smartphone users can save many pictures taken in burst shots in one file, and it is also very convenient to share them with others. In addition, you can create a live photo, such as saving a short audio at the time of taking a photo or moving a part of the photo. In addition, it can be used for various applications such as a photo diary app that stores images, voices, and diary text in a single All-in-JPEG file. In this paper, we developed an app that creates and edits All-in-JPEG, a photo diary app, and a magic photo function, and verified feasibility of the All-in-JPEG through them.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06b
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• pp.178-180
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• 2012

협업은 둘 이상의 사람들이 하나의 업무 또는 목적을 달성하기위해 공동으로 협력하여 일하는 것이다. 최근 개인 및 조직 간 협업 범위가 공동분석, 데이터 연계, 서비스 조합 등으로 확장되고 대용량 데이터 공유 및 실시간 연계분석 활동이 증대되면서 협업 지향적인 시스템 설계와 개발이 중요시 되고 있다. 특히 스마트워크와 지능화된 협업 기반은 데이터, 프로세스, 서비스, 사람 간의 다차원 연계와 실시간 활용, 의미 기반의 기계적 협력을 전재로 하고 있다. 본 연구에서는 Data, Process, Service, People 측면의 4가지 계층으로 전사적 자원을 설계하고 메타 메타데이터 기반의 온톨로지 분석을 통해 자원 간의 연계와 조합을 지원하는 시스템을 설계했다. Data 계층은 프로세스별 Input, Output 정보를 식별하여 Data의 메타 정보를 정의하고 이를 검색 에이전트가 색인하여 모델링에 참조할수록 한다. Process 계층은 BPMN모델을 확장한 exCPM의 개선 모델을 바탕으로 프로세스를 수행주체 간, 정보공유측면에서 프로세스를 분석했다. Service 계층은 협업지향적인 프로세스를 구성하는 컴포넌트를 서비스로 인식하고 프로파일을 통해 협업을 위한 검색과 프로세스를 연계지원하도록 설계 했다. 마지막으로 People계층은 자원, 프로세스, 서비스 등 시스템에 관여하는 참여자들의 메타정보를 정의하고 이를 온톨로지 기반의 모델에 통합하여 자동 검색되도록 설계했다. 이를 통해 프로세스와 서비스 측면에서 협업을 요구하는 에이전트와 일반 검색 사용자들이 프로세스 간 협업 자원을 파악하고 상호 관계를 분석할 수 있도록 하는 한편, 프로세스를 지원하는 컴포넌트와 서비스 간의 자동적인 조합을 통해 통합적 자원 협력과 실시간 협업 지원 기반을 제시했다.

• Smart Media Journal
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• v.3 no.4
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• pp.16-21
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• 2014

HEVC is the latest joint video coding standard with ITU-T SG16 WP and ISO/IEC JTC1/SC29/WG11. Its coding efficiency is about two times compared to H.264 high profile. Intra prediction has 35 directional modes including dc and planer. However an accurate mode decision on lots of modes with SSE is too costly to implement it with hardware. The key idea of this paper is a DCT shared architecture to reduce the complexity of HEVC intra encoder. It is to use same DCT block to quantize as well as to calculate SSE in RDO. The proposed intra encoder uses two step mode decision to lighten complexity with simplified RDO blocks and shares the transform resources. Its BD-rate increase is negligible at 20% on hardware aspect and the operating clock frequency is 300MHz@60fps on FHD ($1920{\times}1080$) image.

• Journal of the Korean earth science society
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• v.43 no.5
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• pp.579-590
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• 2022

In this study, we aimed to develop a Python-based outer-ring galaxy analysis algorithm according to the data science process. We assumed that the potential users are citizen scientists, including students and teachers. In the actual classification studies using real data of galaxies, a specialized software called IRAF is used, thereby limiting the general public's access to the software. Therefore, an image analysis algorithm was developed for the outer-ring galaxies as targets, which were compared with those of the previous research. The results of this study were compared with those of studies conducted using IRAF to verify the performance of the newly developed image analysis algorithm. Among the 69 outer-ring galaxies in the first test, 50 cases (72.5%) showed high agreement with the previous research. The remaining 19 cases (27.5%) showed differences that were caused by the presence of bright stars overlapped in the line of sight or weak brightness in the inner galaxy. To increase the usability of the finished product that has undergone a supplementary process, all used data, algorithms, Python code files, and user manuals were loaded in GitHub and made available as shared educational materials.

• Journal of the Korean Society for information Management
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• v.19 no.2
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• pp.131-158
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• 2002

The purpose of this study is to suggest the basic data for providing library information services of high quality with clients, by designing the model of MyCyberLibrary and evaluating it. The model of MyCyberLibrary was constructed based on the survey results on the information-seeking behavior of users and on the review of the existing mylibraries'functions. The model is implemented into the prototype system which consists of nine modules. Finally, we evaluated the proposed system via mail questionnaires, and proposed three suggestions to make this system a much more comprehensive and effective one.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.16 no.2
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• pp.61-82
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• 2005

It is essential to describe information on a person, family or corporate body that is responsible for creation of archives in providing archival contextual information. This paper discusses the establishment of contextual information based on the authority control of creators of archives by using international standards such as ISAAR (CPF) : International Standard Archival Authority Record for Corporate Bodies, Persons, and Families, Second edition and EAC(Encoded Archival Context). It introduces the LEAF(Linking and Exploring Authority Files) Project in Europe, which presents the model for exchanging and sharing of authority data between libraries, archives and museums by employing EAC. The concluding remarks stress limitations associated with establishing and exchanging of authority files and requirements for the establishment of archival contextual information nationally.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.05a
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• pp.1765-1768
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• 2005

Binary-search 알고리즘을 이용한 새로운 6-bit 300MS/s ADC 를 제안 하였다. 본 연구에서 제안된 ADC 는 저전력, 고속동작, 저해상도의 응용분야에 적합하도록 설계 되었다. 11 개의 rail-to-rail 비교기와 기준전압 발생기, 그리고 기준전압 제어회로로 구성 되었으며, 이는 기존의 구조와는 다른 전혀 새로운 형태로 제안된 것이다. 전력소모를 줄이기 위해 비교기 공유기술을 사용하였다. 또한 ADC 의 sub-block 인 rail-to-rail 비교기는 인버터 logic threshold 전압 값을 이용한 새로운 형태의 비교기를 제안하였다. 비교기는 인버터와 n-type preamp, p-type preamp 그리고 각각에 연결되는 latch 로 구성되었다. 기존의 rail-to-rail comparator 에 비해 입력 범위 전체 영역에서 일정한 gm 값을 얻을 수 있다. 실험결과 2.5V 공급전압에서, 17mW 의 전력 소모를 보이며, 최대 304MS/s 의 데이터 변환율을 가진다. INL 과 DNL 은 입력신호가 2.38Mhz 의 주파수를 가지는 삼각파일 때, 각각 ${\pm}0.54LSB$, ${\pm}1LSB$ 보다 작다. TSMC 0.25u 공정을 이용하였다.