• Particle and aerosol research
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• v.19 no.4
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• pp.145-154
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• 2023

Granular bed filters are widely used to remove particulate matter in flue gas and are filled with various shapes of packing material. The packing material plays an important role in determining the overall collection performance, such as pressure drop and collection efficiency. The pressure drop of a granular bed filter has been calculated using the Ergun equation, while the collection efficiency has been predicted using the log-penetration equation based on the single sphere theory. However, a prediction equation of collection efficiency for a granular bed filter filled with non-spherical packing materials has not been suggested yet. Therefore, in this study, three different shapes of packing materials (sphere, cylinder, and irregular) were prepared to propose a prediction equation. The pressure drop and collection efficiency in a granular bed filter filled with each shape of packing material were measured experimentally and compared with theoretically predicted values. We found that experimentally measured pressure drops matched well with values theoretically predicted using the Ergun equation considering the shape factor. However, experimental collection efficiencies were higher than theoretical ones predicted by the log-penetration equation using the single sphere theory. We modified the log-penetration equation by employing a shape factor and found a good relationship between experimental and theoretical collection efficiencies.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.35 no.2
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• pp.5-23
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• 2024

The seventh year of implementing online material deposit demands a systematic collection, legal and regulatory improvements, and the establishment of a long-term strategic plan for online material collection. In this study, we aimed to propose an online material collection strategy and a long-term roadmap for preserving online resources as national intellectual and cultural heritage for future generations. To achieve this, we analyzed the status of domestic and foreign libraries, related laws and regulations, and the types and collection status of online materials. Based on this analysis, we proposed practical collection standards and methods. Ultimately, a long-term roadmap and implementation plan were suggested. The long-term development plan for online material collection established a phased, concrete implementation strategy. This includes the foundation-building phase of online material collection, followed by the expansion phase, and finally reaching the maturity phase.

• Journal of Korean Society of Water and Wastewater
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• v.18 no.1
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• pp.66-72
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• 2004

In this study, quantity and quality of collected rainwater by sand, gravel, soil, lawn and concrete surface, as collection materials were investigated and Rainwater Collection Prediction Model was developed to predict the amount of collected rainwater. The quantity of collected rainwater in concrete surface, gravel, sand, soil and lawn collection system was 1,067L(93.2%), 1,006L(87.8%), 902L(78.8%), 800L(69.9%), 788.5L(68.8%) for 8 months period, respectively. The average turbidity of collected rainwater in concrete surface, gravel, sand, soil and lawn collection system was 3.2NTU, 2.2NTU, 1.9NTU, 1.7NTU, 1.5NTU for 8 months period, respectively. For sand collection material, predicted amount by the Model and actual collected amount were 931.5L and 902L, which were very closed. For gravel collection material, predicted amount by Model and actual collected amount were 1,028.21. and 1,006L, which were very closed. To simulate the optimal rainwater storage volume, the rainfall and evaporation data in Dae-jeon city were used. For sand collection system with 30m2 area, the maximum storage volume was $17m^3$ and 62% of the year was secured for use of 240L/day.

• The Korean Journal of Malacology
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• v.32 no.2
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• pp.141-147
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• 2016

In addition to the Arcidae (Lutaenko, 2015), a collection of Mytilidae, Ungulinidae and Tellinidae from Japan, identified by the German malacologist C.E. Lischke, was found and studied at the Zoological Institute, Russian Academy of Sciences, St. Petersburg. This collection is very important for regional malacological studies in Japan, Korea and China as it contains type material and vouchers. Syntypes of Mytilus atratus Lischke, 1871 (= Xenostrobus atrata (Lischke, 1871)) and vouchers of Tellina diaphana Deshayes, 1855 (= Serratina diaphana (Deshayes, 1855)), Tellina nitidula Dunker, 1860 (= Nitidotellina hokkaidoensis (Habe, 1961)), and "Diplodonta orbella Gould, 1851" (= Diplodonta gouldi Yokoyama, 1920)) are figured with taxonomic and nomenclatural comments. No other voucher or type specimens used in the compilation of the Japanische Meeres-Conchylien were located in the entire bivalve collection.

• Journal of Information Management
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• v.42 no.4
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• pp.175-194
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• 2011

This study evaluated the fiction collection of Korean public libraries by applying use factor and suggested various measures to enhance collection development function. As a result, while the collection building and borrowing ratios of Korean literature in literature collection by language were the highest at 62.6% and 54.3% respectively, the use factor was lower than the base value(1.00). And while the collection building and borrowing ratios of Korean contemporary fiction by item category were the highest at 65.60% and 51.36% respectively, the use factor was lower than the base value and the use factor by year is decreasing in recent years. The reason is because of poor collection development. Therefore, public library need to consider active alternatives such as establishment of the collection development policy and fiction collection development guideline, composition of the fiction material selection committee, adaption of the dedicated librarian system for fiction material development, development and utilization of a selection tool for fiction materials, and periodic evaluation of fiction collection.

• Conservation Science in Museum
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• v.7
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• pp.75-87
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• 2006

The National Museum of Korea has striven for the stable preservation environment for its collection as it reopened in October 2005. The temperature and humidity, harmful gases in the collection storage space and the galleries were regularly measured to confirm whether the environment was stable for the collection; the material that could directly influence the collection such as showcases were tested in advance to select stable material. In addition, to prevent biological damage, whole collection was fumigated; insect monitoring traps have been regularly established to check the status of the collection storage space.

• Journal of Korean Library and Information Science Society
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• v.43 no.1
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• pp.201-219
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• 2012

Cloud collection, which is derived from cloud computing, is a framework that creates new value through library cooperative platform to preserve and manage libraries' duplicated collection. Due to E-book market vitalization and mass digitalization of retrospective print material, new library collection management paradigm has been expected that licensed based E-book service and management of shared print repository. This study discuss cloud collection concept which digital repository and Shared print repository are in complementary relations. And suggest cloud collection model can be applicable to Korean university libraries.

• Journal of the Korean Society for Library and Information Science
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• v.49 no.2
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• pp.111-134
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• 2015

This research was initiated on the basis that public libraries should serve its role as a supplier of intellectual informations to all users and the National Library of Korea should play a role as chief supporter of collection preservation in individual libraries. Situated in such context, this study attempted to investigate several aspects of the present conditions of Korea public libraries, including the current technical ability and technicians available for materials preservation and restoration, current policies for preservation and provisions for disasters, and opinions on establishment of national library preservation and restoration center. Data was drawn from a survey with 208 public libraries in the country. As a conclusion, this study discusses such as 1) securing collection management policies for material preservations and restorations at the level of individual libraries 2) building tripartite system for efficient and methodical material preservations and restorations including public libraries, regional central libraries and the National Library of Korea.

• Fashion & Textile Research Journal
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• v.23 no.6
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• pp.709-725
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• 2021

The study focused on the design features of Chanel and Fendi, directed by Carl Lagerfeld, creative director of Chanel and Fendi until his recent death. The range of the study was from the 2017 S/S Collection to the 2019 F/W Collection, which collected a total of 767 fashion photographs, including 483 Chanel, 284 Fendi, with tops, bottoms and dresses at VOGUE (https://www.vogue.com). According to the data analysis criteria organized based on prior research and related literature, it was classified in the order of form, color, material, pattern, decoration, fashion image, item and coordination, and content analysis was conducted based on statistical analysis. Overall, the design characteristics of the Chanel collection, directed by Karl Lagerfeld, were rectangle form, tone in tone coloring, combination of identical materials, geometric patterns, and classical images as the main design characteristics of the Chanel collection. The design characteristics shown in the Fendi collection directed by Karl Lagerfeld were rectangle form, tone in tone coloration, hard material combination, abstract pattern, and total coordination. Comparing the design features of Chanel and Fendi, directed by Karl Lagerfeld, is as follows. Chanel and Fendi's designs show a lot of rectangle form, tone-in-tone colors, hard-materials and combination of the same material.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2004.11a
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• pp.444-447
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• 2004

A heart diagnosis system adopts hundreds of Superconducting Quantum Interface Device(SQUID) sensors for precision MCG(Magnetocardiogram) or MEG(Magnetoencephalogram) signal acquisitions. This system requires correct and real-time data acquisition from the sensors in a required sampling interval, i.e., 1 mili-second. This paper presents our hardware design and test results, to acquire data from 256 channel analog signal with 1-ksample/sec speed, using 12-bit 8-channel ADC devices, SPI interfaces, parallel interfaces, and 8-bit microprocessors. We chose to implement parallel data transfer between microprocessors as an effective way of achieving such data collection. Our result concludes that the data collection can be done in 250 ${\mu}sec$ time-interval.