• KLA journal
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• v.2 no.1
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• pp.39-52
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• 1961

• Tunnel and Underground Space
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• v.32 no.4
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• pp.243-253
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• 2022

In this study, the cutting efficiency of TBE (Tunnel Boring Extender) was evaluated by using rotary cutting tester. In the rotary cutting test, a specimen which has a drilled hollow hole at the center was made of rock-like material. The specimen was cut by UDC (undercutting disc cutter) with spiral cutting path to simulate the cutting process of TBE. The cutting forces and specific energy were evaluated under different cutting conditions. The results indicated that the cutter forces of UDC linearly increased with the vertical and radial penetration depths. Among the three directional cutter forces, the normal force is larger than other force components. While the specific energy decreased with the two penetration depths, in particular, it was presumed that the specific energy was minimized at a certain value of the ratio of radial to vertical penetration depth.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.2
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• pp.53-58
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• 2019

In this paper, we propose a new definition for the Private interface communication protocol structures order to improve the performance of LDAP-based Ud interface. Performance tests were separated by LDAP-based interface method and Private based interface method and analyzed the results of the performance test. As a result, it was confirmed the amount of processing of the received message and the response message to the result of the performance test that the Private based Ud interface method is 1.7 times(avg.) higher than the LDAP based Ud interface method.

• Journal of the Korean Society for information Management
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• v.40 no.4
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• pp.147-165
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• 2023

New technologies representing the Fourth Industrial Revolution are already being realized in library services. There is not, however, active research on measures to increase work efficiency by introducing a new technology in the work of "classification" that is part of the traditional librarian jobs they should continue in the future. The Dewey Decimal Classification (DDC) has not issued a print version since 2018. This study analyzes cases of WebDewey, Classification Web, and UDC Online. The functions required for the development of the Korean Decimal Classification (KDC) web version were derived, and the final functions suitable for the development of the KDC web version were proposed through AHP analysis.

• Digital Contents
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• no.11 s.162
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• pp.128-137
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• 2006

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.1 no.1
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• pp.31-32
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• 1972

• Journal of Korean Library and Information Science Society
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• v.35 no.4
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• pp.469-489
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• 2004

Time(Period table) is the chronological factor in a subject. Classification schemes are using the period tables for represent the time. CC and UDC's common auxiliary of time tables are consistence and clear. DDC and KDC are using the different way, though the notation is complicated.

• Journal of the Korean Society for Library and Information Science
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• v.46 no.3
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• pp.181-201
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• 2012

This study aims to analyze and compare the structures of auxiliary tables regarding places - for example, Korea using several decimal classification systems such as DDC, UDC, KDC and NDC. For each auxiliary table, the codes were described in detail and the special characteristics were discussed. The common characteristics and the different aspects of different decimal classification systems were investigated as well as divisions of Korea in Korean Wikipedia and an administrative district classification system. This study suggests a new basic summary for the expansion of codes of Korea in auxiliary table in DDC with its principles and options and it will be useful for revising process of many decimal classification systems.

• Journal of Korean Library and Information Science Society
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• v.44 no.3
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• pp.29-49
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• 2013

Among the auxiliary sciences of history field in the KDC 5th edition, several classification system problems are found with the fields of Archaeology, Diplomatics, Archival Science, Genealogy, and Biography. The purpose of this study is to propose their improvements. To achieve this purpose, first, this study compared and analyzed the Auxiliary Sciences of History field of LCC, DDC, KDC, NDC, UDC, CLC. Second, this study investigated the actual conditions of KDC in the library field to diagnose several application problems. Finally, based on the findings, the improvements of KDC were suggested.

• Journal of Korean Library and Information Science Society
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• v.34 no.1
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• pp.239-260
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• 2003

The purpose of this study is to devise a classification scheme to arrange the agricultural information efficiently. In the first part it defines the agricultural science and studies the content and system of the agricultural science. It compares current KDC with DDC, UDC and NDC used to agriculture parts, and it studies AGRICOLA SCC. On the basis of it, this study is displayed the new classification for the agricultural science. The new classification scheme Is classified by the basic theories related to agriculture, agriculture of plants, animal agriculture, food products, and auxiliary disciplines in turn. The number of main divisions are set up 23 items.