• 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.

• Korean Journal of Microbiology
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• v.55 no.3
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• pp.296-299
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• 2019

The genus of Bacteroides has been isolated from vertebrate animal feces. Bacteroides sp. KGMB 02408 was isolated from fecal samples obtained from a healthy Korean. The wholegenome sequence of Bacteroides sp. KGMB 02408 was analyzed using the PacBio Sequel platform. The genome comprises a 5,771,427 bp chromosome with a G + C content of 39.50%, 5,005 total genes, 18 rRNA genes, and 74 tRNA genes. Furthermore, we found that strain KGMB 02408 had some genes for oxidoreductases and menaquinone biosynthesis in its genome based on the result of genome analysis.

• Journal of Korean Library and Information Science Society
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• v.40 no.3
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• pp.97-117
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• 2009

Collection Development Policy(CDP) is the master plan for managing libraries and information centers through which the features and categories of collections are defined and sorted. The National Digital Library therefore needs to determine its manifest principles based on CDP regarding the magnitude of acquisition, the acquisition priority and the magnitude of purchases. This paper pertains to the principal model for NDL Collection Development Policy as a primer for establishing NDL Collection Development Policy in order to illustrate essential elements of national collection development policy and provide general guidelines for NDL Collection Development Policy. To propose an independent Collection Development Policy appropriate for NDL by analyzing cases in digital resource development policies. To guide establishing principles for determining the types and magnitude of NDL collection acquisition, prioritizing acquisition, making decisions on purchase magnitude and licensing. To identify the essential elements in systematic development of national digital information resources; and to propose a model for NDL's CDP accordingly.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.24 no.4
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• pp.133-152
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• 2013

This study strives to perform a pilot collection assessment study with the political science collection in a university library. Employing the basic list-checking analysis method, the study scrutinized the collection statistics and the circulation statistics, and check the current library holdings with a standard list which was composed of cited works extracted from course syllabi, theses, dissertations and faculty research papers. Although the study is a pilot case study that a particular model was applied to a collection in the field of political science, the result and procedures of the assessment will provide some implications regarding collection assessment in university libraries.

• Journal of the Korean Society for information Management
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• v.27 no.1
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• pp.79-102
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• 2010

In Korea, more than half of medical libraries are small.sized hospital libraries operated under the single.librarian system, and it is keenly required to establish collection management policies for exchanging resources with other libraries and maintaining consistency. however, it is rare to set up their collection management policies on the web among the domestic medical libraries. Thus, this study purposed to survey cases of collection management policies in domestic and foreign medical libraries and to provide basic information and ideas for Korean medical libraries that are preparing collection management policies. As long as core requirements are satisfied, collection management policies do not have a way. Thus, this case study is expected to provide useful ideas to medical libraries developing their collection management policies. For this purpose, we selected 12 survey items based on previous studies, and investigated one domestic and five foreign medical libraries, and analyzed collected data. Based on the results of analyzing the cases, we suggested 12 guidelines.

• Spatial Information Research
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• v.9 no.1
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• pp.15-30
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• 2001

Solid waste collection service is viewed as one of the most important public services in urban area. The purpose of this study is to apply the GIS based regional partitioning and arc routing methods for solid waste collection districting and vehicle routing-scheduling in order to provide waste collection service more efficiently. In this study, solid waste deposit sites are derived from the centroid of each building and the amount of solid waste is deduced based on the number of households and establishments. The regional partitioning procedure is performed based on waste collection zones which are constructed from waste deposit sites. The result of this study shows that solid waste collection districts which are delineated by regional partitioning method are able to increase efficiencies and cut costs in performing solid waste collection services. Also the output of vehicle-scheduling from the analysis of arc routing may provide more efficiently and quickly manage the scheduling of the residential solid waste collection routes, reducing costs with minimal deadheading costs. Therefore, the application of GIS based on regional partitioning and arc routing methods would be very useful to construct a solid waste management system by supplying the important and flexible informations for solid waste collection districts and vehicle routing-scheduling for waste collection.

• Proceedings of the Korean Society of Crop Science Conference
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• 2017.06a
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• pp.106-106
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• 2017

The soybean [Glycine max (L.) Merr.] is one of the most important crop resources worldwide as food and forage. It is also important and valuable that to hold crop resources to have high genetic diversities. Recently, a core collection has been constructed in many plants to preserve the genetic resources of various plants. A core collection is small population to represent the genetic diversity of the total collection, and is of strategic importance as they allow the use of a small part of a germplasm collection that is representative of the total collection. Here, we developed the core collection consisting of 816 accessions by using approximately 180,000 (180K) single nucleotide polymorphisms (SNPs) developed in previous study. In addition, we performed genetic diversity and population structure analysis to construct the core collection from entire 4,392 collections. there were excluded sample call rates less than 93% and duplicated samples more than 99.9% according to genotype analysis using 180K SNPs from entire collections. Furthermore, we were also excluded natural hybrid resources which Glycine max and Glycine soja are mixed in half through population structure analysis. As a result, we are constructed the core collection of genetic diversity that reflects 99% of the entire collections, including 430 cultivated soybeans (Glycine max) and 386 wild soybeans (Glycine soja). The core collection developed in this study should be to provide useful materials for both soybean breeding programs and genome-wide association studies.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.16 no.2
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• pp.203-224
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• 2005

The purpose of this study is to provide guidelines of library collection development policies statements. As a case study, 5 national and 2 public libraries are selected and analyzed by using 10 elements, which were drawn from existing studies, for examining collection development policy statements. The results show several suggestions which may help the people who is interested in preparing collection development policy statements.

• Journal of the Korean Society for Library and Information Science
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• v.39 no.2
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• pp.185-209
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• 2005

The description of resources at collection-level is being recognised as an important component of information services that seek to provide integrated access to distributed resources. This research investigated the concept, necessities, and standards of collection level description which manages heterogeneous and distributed resources effectively. Also this research reviewed collection level description projects in other countries to show a new direction of subject access in digital libraries.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 1997.06a
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• pp.7-9
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• 1997