• The Korean Journal of Archival Studies
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• no.49
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• pp.299-325
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• 2016

This paper examines the importance, types, and locations of maul records, and the methods for collecting, preserving, and using them. Maul records reveal the nature of the residents' ordinary lives, help to closely examine the history and culture of the maul, and serve as cultural resources that supplement oral records. Collecting materials from maul records requires understanding the types, locations, and states of the records. Maul records should include records created by the local organizations, personal records by individuals, and records that evidence the history of the maul. The collection methods of maul records are categorized into regular collection, irregular collection, passive collection, and active collection. These records need to be locally conserved in the maul. They can enhance the residents' lives, and can be used to help produce books, posters, calendars, commercial advertisements, symbols, academic education, exhibitions, digital contents, and historical records. They are also useful in helping to market the history.

• Particle and aerosol research
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• v.19 no.3
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• pp.63-76
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• 2023

An electrostatic precipitator (ESP) has a low pressure drop and a high collection efficiency but its collection efficiency can be reduced due to dust accumulation on the collection plates during long-term operations. In order to maintain the initial dust collection efficiency, it is necessary to periodically clean the collection plates. The common cleaning methods are using physical impacts or water sprays. These cleaning methods can lead to damage to the collection plate or generate wastewater. Herein, we implemented an electrodynamic screen (EDS) for ESP cleaning and evaluated its surface cleaning performance of particles. The EDS is an electrostatic system that can electrostatically repel particles on surfaces, allowing it to clean the ESP without causing damage and wastewater generation. Our evaluation included the analysis of the effects of AC voltage characteristics, electrode configuration and environmental conditions on the cleaning performance of the EDS with the aim of achieving effective surface cleaning. It has been demonstrated that activating the EDS cleans up to 65% of the particles on the surface, which indicates about 94% of our target cleaning zone.

• Journal of the Korean Society for Library and Information Science
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• v.49 no.1
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• pp.201-221
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• 2015

The purpose of this study is to suggest the usability of collection evaluation methods for collection development policy in public libraries. To achieve this purpose, this study applied Bonn's Use Factor, Turnover Rate of Collection, and Trueswell's 80/20 Rule to actual circulation data of the Gwangjin District Public Library in Seoul during last ten years. This study added practical meanings and values in collection evaluation through the analysis of total holdings and subject classes. Main items of analysis are the rate of use to total holdings and to holdings in specific subject classes by year, and the rate of core collection circulation by year. The results show relations between the rate of use and library's performance through the analysis of the rate of use both total holdings and subject classes. The results also figure out user's patterns and library appraisal of community users through the analysis of circulation data. In addition, the analysis of core collection gives a good basis for an effective collection development policy.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.65 no.9
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• pp.1605-1609
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• 2016

The measurement of current collection performance between pantograph and contact wire of overhead catenary system is intended to prove the safety of operation and the quality of the current collection system. The results of interaction performance of current collection system are required for approving with commercial operation on railway lines. The methods of interaction performance of current collection system are defined on interactional standards such as IEC 62486 and EN 50317. In this paper, the interaction performance is evaluated by the percentage of arcing on Honam high-speed line and the results are used for adjustment of the overhead catenary line structure. The experimental results in Honam high-speed line confirm that the duration of an arc lasting longer 25 ms between pantograph and contact wire was depended on the conditions of overhead contact line after installation.

• Asian Journal of Atmospheric Environment
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• v.11 no.2
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• pp.131-137
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• 2017

A cyclone is an effective tool to facilitate the collection of aerosol particles without using filters, and in cell exposure studies is able to collect a sufficient amount of aerosol particles to evaluate their adverse health effect. In this study, we examined two different methods to improve the aerosol particle collection efficiency of a cyclone. The individual and combined effects of reducing the surface roughness of the inner wall of the cyclone and of using a circular cone attachment were tested. The collection efficiency of particles of diameter $0.2{\mu}m$ was improved by approximately 10% when using a cyclone with a smoothened inner wall (average roughness $Ra=0.08{\mu}m$) compared with the original cyclone ($Ra=5.1{\mu}m$). A circular cone attachment placed between the bottom section of the cyclone and the top section of a collection bottle, resulted in improved collection of smaller particles without the attachment. The 50% cutoff diameter of the modified cyclone (combined use of smoothened inner wall and attachment) was $0.23{\mu}m$ compared to $0.28{\mu}m$ in the original model. The combined use of these two techniques resulted in improved collection efficiency of aerosol particles.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.20 no.2
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• pp.45-58
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• 2009

Due to the advent of knowledge-based society and digital environment, libraries especially national libraries are undergoing a transformation and the new concepts, processes and tools for collection development as the heart of libraries are evolving. The purpose of this paper is to propose the direction of hybrid resources development for ensuring sustainable collection and preservation of resources in national libraries. Accordingly, this paper looks about a transformation of national libraries and collection development, and investigates the coverage of national collections based positioning of national libraries through performance indicators in standard, definitions, purposes and missions. It also proposes legal deposit methods of digital resources through the law related library and investigates archiving method of online digital resources including hybrid collection development system in national libraries.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.371-375
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• 2007

Korea's information dependency on the foreign information is high and the domestic information production volume absolutely insufficient. So, research and academic library will select information resources through the limited budget and back up the research and development. This paper propose methods using union cataloging for effective journal collection development through a case study on the OCLC Collection Analysis system and Ulrich Serials Analysis System(USAS).

• Microbiology and Biotechnology Letters
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• v.24 no.1
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• pp.132-136
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• 1996

A comutation server is needed to provide analysis programs to Korean biologists, especially genome researchers, on GINet. For each analysis program, we implmented an input form with HTML and a CGI program for interface between an input form and an analysis program with C language on GINet computatin Web server. We made two construction methods of CGI programs for analysis programs, and implemented all CGI programs based on the methods followed by modifying each CGI program for specific processing of each program. On the server ten programs are availabel now, which include most frequently used ones and those developed by our team, and most programs with will be ported or developed by our team will be available on the Web server.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.5
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• pp.618-629
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• 2002

This study examines the Jukchoui and Jukchosang from the late 19th century archived at Wonkwang University Museum focusing on the order and techniques of sewing used to make them to arrive at a better understanding of the sewing methods in late Chosen period and of 'Po'(Robe), one of the most symbolic outfits in Eastern Asia. Since there is no document on the items in Wonkwang collection, I reproduced and studies them based on the 19th-century sample. The sewing methods used for these items included fine broad-stitching, saddle-stitching, blind-stitching, and hemming, and there was no lining for the robe. The items in Wonkwang collection seem to reflect the trend of the late Chosun period when various systems including that of clothing were simplified: Jukchoui and Jukchosang in the period had same design for all levels, but colors and lengths were varied to mark the status of the wearer.

• Nuclear Engineering and Technology
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• v.54 no.5
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• pp.1760-1768
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• 2022

When gamma-camera sensor modules, which are key components of radiation imagers, are derived from the coupling between scintillators and photosensors, the light collection efficiency is an important factor in determining the effectiveness with which the instrument can identify nuclides via their derived gamma-ray spectra. If the pixel area of the scintillator is larger than the pixel area of the photosensor, light loss and cross-talk between pixels of the photosensor can result in information loss, thereby degrading the precision of the energy estimate and the accuracy of the position-of-interaction determination derived from each active pixel in a coded-aperture based gamma camera. Here we present two methods to overcome the information loss associated with the loss of photons created by scintillation pixels that are coupled to an associated silicon photomultiplier pixel. Specifically, we detail the use of either: (1) light guides, or (2) scintillation pixel areas that match the area of the SiPM pixel. Compared with scintillator/SiPM couplings that have slightly mismatched intercept areas, the experimental results show that both methods substantially improve both the energy and spatial resolution by increasing light collection efficiency, but in terms of the image sensitivity and image quality, only slight improvements are accrued.