• IEIE Transactions on Smart Processing and Computing
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• v.6 no.1
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• pp.1-9
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• 2017

This paper proposes to improve the performance of a strap down inertial navigation system using a foot-mounted low-cost inertial measurement unit/magnetometer by configuring an attitude and heading reference system. To track position accurately and for attitude estimations, considering different dynamic constraints, magnetic measurement and a zero velocity update technique is used. A conventional strap down method based on integrating angular rate to determine attitude will inevitably induce long-term drift, while magnetometers are subject to short-term orientation errors. To eliminate this accumulative error, and thus, use the navigation system for a long-duration mission, a hybrid configuration by integrating a miniature micro electromechanical system (MEMS)-based attitude and heading detector with the conventional navigation system is proposed in this paper. The attitude and heading detector is composed of three-axis MEMS accelerometers and three-axis MEMS magnetometers. With an absolute algorithm based on gravity and Earth's magnetic field, rather than an integral algorithm, the attitude detector can obtain an absolute attitude and heading estimation without drift errors, so it can be used to adjust the attitude and orientation of the strap down system. Finally, we verify (by both formula analysis and from test results) that the accumulative errors are effectively eliminated via this hybrid scheme.

• Journal of the Korean Society for information Management
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• v.23 no.4 s.62
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• pp.69-87
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• 2006

The access to literary works, including fictions, has focused on descriptive elements, and the subject access has been confined to denotative elements such as the subject matter, name of character and geographical name, etc, which appear in the work. This practice will not lead to the essence of subject of fiction, and does not reflect the demand of users for the subject who pursue aesthetic experience. In this study, concepts of symbol and motif and their possibility to be used as subject access point are considered to enhance a subject access scheme. In addition, this study tries to build the scheme of symbol and motif by using the glossary as the source of information. The composed schemes are applied to 20th century Korean fictions and its usability and limits are discussed.

• Journal of Information Management
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• v.26 no.2
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• pp.61-79
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• 1995

The purpose of this paper is to investigate search efficiency of controlled vocabulary versus uncontrolled vocabulary subject access in online catalog systems. The question of the effectiveness of controlled versus uncontrolled vocabulary in information retrieval has been raised in many literatures. A debate continues in the Library and Information Science Professions over the relative merit, appropriateness, and efficiency of uncontrolled vocabulary subject access in online catalog systems. Actually users used to combine uncontrolled vocabulary subject searching with controlled vocabulary subject searching. But the success of user's subject search depends on his choice of search terms. Also the technical developments that facilitate cooperation among information services in general make it increasingly possible for such cooperation to take place on an international level. In this study, several common types of vocabularies on online catalog systems are described and compared, especially usages of vocabularies in multilingual environment are analyzed.

• Journal of the Korean Society for information Management
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• v.31 no.1
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• pp.31-51
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• 2014

This study aims to suggest several improvement strategies for the access and retrieval system of National Library of Korea Subject Headings (NLKSH). For this purpose, first of all, the access and retrieval systems in five selected subject headings were examined. Second, focus group interviews and system analysis were conducted to reveal the current condition and suggest the future development strategies. Third, IFLA's Guidelines for Subject Access in National Bibliographies and FAST application cases were analyzed to suggest implications on the improvement strategies. Upon these analysis, recommendations for improving access and retrieval systems of the NLKSH were proposed in four areas as follows: functionalities, interfaces, queries, and other front-end features.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.25 no.4
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• pp.171-185
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• 2014

The purposes of this study are to examine the various methods of subject access in the rapidly changing environment and to suggest the future of subject access in National Library of Korea (NLK). First of all, current status and problems of Library of Congress Subject Headings List as an representative subject headings in the world and the ways of improving effectiveness of subject retrieval were dealt with. As the ways of improving subject access, social bookmarking, folksonomy, tagging, facet applications, automatic assignment of keyword, thesauri, classification system, and auto-assigned search box were suggested. Finally, current status of NLK subject headings and the ways of improving for utilization of the subject headings as subject access were provided.

• Journal of Korean Library and Information Science Society
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• v.46 no.3
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• pp.301-323
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• 2015

This study was conducted to analyze the characteristics of records related to Korea shown in the cataloging records of major 10 Asia-Pacific university libraries. The results are as follows. To begin with, Korea-related records in most university libraries are very poor except for some libraries and are generally 2 times less than Japan related records. There are even 6 times less in 2 libraries. Second, most libraries organize records in MARC 21 format rather than UNIMARC, and apply subject headings of the national library, or go together with LCSH. Third, Korean materials usually write Korean in Roman characters, but 5 libraries are marked with the original Korean language and available Hangeul search. Forth, on investigation of the subject distribution in sub criteria of Korea-related records, subject related to 'history', 'economy', and 'politics' is largely shown in the highest rate. Fifth, Among the Korea-related subject heading, the terms such as 'Taekwondo', 'Kimchi', 'Dokdo', 'Donghae', 'Duman-gang', 'Baekdu-san' have different meanings in different libraries. However, these terms agree to LCSH in most libraries except for neighboring countries's libraries.

• Journal of Korean Library and Information Science Society
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• v.45 no.3
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• pp.191-212
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• 2014

This research was conducted to analyze the actual condition of records related to Korea shown in the catalog of major 10 European university libraries. The results are as follows. To begin with, most libraries apply subject headings of the national library, or go together with LCSH, and organize records in MARC 21 format rather than UNIMARC. Second, Korean materials usually Romanize Korean words, but three libraries are only marked with the original Korean language and available Korean search. Third, Korea-related records in most university libraries are very poor except for some libraries and are generally 2 times less than Japan related records. There are even 6 times less in 2 libraries. Forth, on investigation of the subject distribution in sub criteria of Korea-related records, subject related to 'history', 'politics', and 'economy' is largely shown in the highest rate. Fifth, Among the Korea-related subject heading, the terms such as 'Taekwondo', 'Kimchi', 'Dokdo', 'Donghae', 'Duman-gang', 'Baekdu-san' have different meanings in different libraries. However, these terms agree to LCSH in most libraries except for some libraries.

• Journal of the Korean Society for Library and Information Science
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• v.48 no.1
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• pp.75-95
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• 2014

The purpose of this study was to propose the improvements for high quality of National Library of Korea (NLK) Subject Headings List which was developed as a subject access tool in 2002. For this study, literature review, case study for subject headings lists of national libraries, and data analysis of headings and relationships were performed. Several problems were found as follows: inconsistency of subject headings descriptions, unclear and unnecessary relationships among headings, inconsistency of hierarchical relationships, lack of currency, incorrectness of classification numbers, duplication of newly requested terms, and assignment of non-preferred and unregistered terms in bibliographic records. Focusing on these problems, modifications of subject headings and bibliographic records, installation and operation of an review committee on subject headings, and supplementation of a manual were suggested to improve NLK Subject Headings List.

• Journal of Korean Library and Information Science Society
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• v.42 no.3
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• pp.331-350
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• 2011

This study compared and analyzed, after extracting the subject titles related to Korea and Japan from the second version of Chinese Classified Thesaurus, the number of titles and characteristics according to the subjects. The analysis result shows that total number of Korea-related titles including proper nouns was 215, which is limited in comparison to that of Japan, in terms of the number and diversity of the subjects. Particularly, the CCT does not accurately reflect the current state of Korea as it uses the word 'Josun' to denote Korea and calls Korean War 'Josun War' as well as only recording it in North Korean history. Meanwhile, Japan-related subject titles include many that show the complicated historical relationship between Japan and China, such as Manchurian Incident and Japan-China War.

• KLA journal
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• v.37 no.5 s.300
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• pp.47-54
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• 1996

한글 주제명표목의 구조를 확립하는데 필요한 기본원칙을 제시하였다. 불연산기호를 사용하게 되면 주표목과 세목간을 구분할 필요가 없어진다. 일부 표목에서는 지명이 세목으로 사용되고 도 다른 표목에서는 지명이 주표목으로 사용되는 등 혼란이 있었다. 자동화 시대에, 어떤 용어가 탐색어의 첫번째 이치에 오는가 하는 것은 중요한 문제가 아니다. 시대구분을 제외하고는 모든 세목을 독립된 표목으로 사용해야 할 것이다. 접속사'와(과)' 또는 복판점(ㆍ)으로 결합된 표목과 도치표모의 형식은 주제명표목에서 사용되지 않는다. 표목과 관련된 용어간을 연결하는 수단으로 색인시스템에서 사용해 온 기호를 도입 하였다.