• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.2B
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• pp.192-202
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• 2004

In this paper we have proposed policy-based network management system architecture for Internet QoS support Mobile IP networks that is divided into four layers(application layer, information management layer, policy control layer, device layer), then we propose an implementation strategy of policy-based network management system to enforce various control and network management operations and a model of policy server using SCOPS(Simple Common Open Policy Service) protocol that is developed in this research. For policy-based mobile IP network management system implementation, we have derived four policy classes(access control, mobile IP operation, QoS control, and network monitoring) and we showed operation procedures for each policy scenarios. Finally we have implemented Internet QoS support policy-based mobile IP network testbed and management system and verified out DiffServ policy enforcement behaviors for a target class service that is arranged a specific bandwidth on network congestion conditions.

• Journal of the Korean Chemical Society
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• v.48 no.2
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• pp.182-188
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• 2004

In this study, the effects of a four-stage problem-solving strategy emphasizing planning and checking stages were investigated. Two high school classes (N=55) were randomly assigned to either treatment or control group, and taught about two topics, 'gas' and 'solution' for 8 class hours. Teacher used the four-stage problem-solving strategy emphasizing planning and checking stages in the treatment group, and used traditional lecture in the control group. Two-way ANCOVA results revealed that the test scores of the treatment group were significantly higher than those of the control group in the problem-solving ability, especially in the subcategories of 'conceptual knowledge' and 'mathematical execution'. There was significant interaction between the instruction and the level of prior achievement in the 'satisfaction' of the learning motivation. The lower level students in the control group were more satisfied with chemistry class than those in the treatment group. There was no significant difference between the two groups in the scores of the awareness of metacognition. Educational implications are discussed.

• Korean Journal of Environmental Biology
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• v.22 no.1
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• pp.12-27
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• 2004

Studies on the Korean cave fauna were reviewed during the last seven decades since the first record of Antrokorean gracilipes Verhoeff, 1938. The cave animals have been reported by only 112 papers, 16 repoyts and ten books. In the results, a total of 257 species is recorded representing four phyla, ten classes, 31 orders, and 94 families, and also the holotype localities of 87 species are recorded from 36 caves and four wells in Boron. Arthropods are predominant consisting of 241 species (93.8％), and true spiders (Araneae) are a most diverse group with 97 species (37.7％) including 21 Korean endemic species belonging to 29 families.

• Journal of Sericultural and Entomological Science
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• v.38 no.1
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• pp.19-24
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• 1996

To investigate the genes which is related to immune reaction of Bombyx mori, differential screening was carried out using naive and induced B. mori mRNA probe. To begin with, we constructed the cDNA library with mRNA isolated from fifth instar larvae injected with E. coli(4 X 106 cells/larva) using Uni ZAP XR vector kit. Thirty-two inducible cDNAs showing higher intensity on the induced mRNA probing membranes were selected. Partial nucleotide sequences of 29 clones were determined and their expessed sequence tags (ESTs) were produced. Nineteen ESTs in 29 ESTs were matched in GenBank database and the rest of them were found to be unknown. These unmatched ESTs were presumed to be novel genes. The nineteen ESTs contained variable genes related to biological process in Bombyx mori and four classes immune genes. Four clones, BmInc 6, 8, 18 and 27 were similar to two antibacterial peptide genes, hemolin gene and transferrin gene, respectively.

• Asian-Australasian Journal of Animal Sciences
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• v.30 no.10
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• pp.1456-1463
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• 2017

Objective: To investigate the effect of host genetics on gut microbial diversity, we performed a structural survey of the fecal microbiota of four purebred boar pig lines: Duroc, Landrace, Hampshire, and Yorkshire. Methods: The V3-V4 regions of the 16S rRNA genes were amplified and sequenced. Results: A total of 783 operational taxonomic units were shared by all breeds, whereas others were breed-specific. Firmicutes and Bacteroidetes dominated the majority of the fecal microbiota; Clostridia, Bacilli, and Bacteroidia were the major classes. Nine predominant genera were observed in all breeds and eight of them can produce short-chain fatty acids. Some bacteria can secrete cellulase to aid fiber digestion by the host. Butyric, isobutyric, valeric, and isovaleric acid levels were highest in Landrace pigs, whereas acetic and propionic acid were highest in the Hampshire breed. Heatmap was used to revealed breed-specific bacteria. Principal coordinate analysis of fecal bacteria revealed that the Landrace and Yorkshire breeds had high similarity and were clearly separated from the Duroc and Hampshire breeds. Conclusion: Overall, this study is the first time to compare the fecal microbiomes of four breeds of boar pig by high-throughput sequencing and to use Spearman's rank correlation to analyze competition and cooperation among the core bacteria.

• Korean Journal of Environmental Biology
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• v.38 no.3
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• pp.433-449
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• 2020

Nine fish and one clam species were collected from freshwater environments in Korea, including four lakes, two streams, and the Nakdong River, to investigate the host-associated bacteria. Hundreds of bacterial strains were isolated from the samples using a cell sorter and a dilution plating method. After identification of the bacterial strains using 16S rRNA gene sequences, 42 strains with greater than 98.7% sequence similarity with validly published species were determined to be unrecorded bacterial species in Korea. These strains were phylogenetically diverse and assigned to four phyla, six classes, 17 orders, 27 families, and 32 genera. At the genus level, the unrecorded species were classified as Corynebacterium, Mycobacterium, Mycolicibacterium, Gordonia, Williamsia, Modestobacter, Brachybacterium, Sanquibacter, Arthrobacter, and Mycolicibacterium of the class Actinobacteria; Empedobacter, and Flavobacterium of the class Flavobacteriia; Fictibacillus, Psychrobacillus, Cohnella, Paenibacillus, Rummeliibacillus, Enterococcus, and Vagococcus of the class Bacilli; Aquamicrobium, Paracoccus, and Sphingomonas of the class Alphaproteobacteria; Achromobacter, Delftia, and Deefgea of the class Betaproteobacteria; and Aeromonas, Providencia, Yersinia, Marinomonas, Acinetobacter, and Pseudomonas of the class Gammaproteobacteria. The 42 unrecorded species were subjected to further taxonomic characterization using gram staining, cellular and colony morphological determination, biochemical analyses, and phylogenetic analyses. This paper provides detailed descriptions of the 42 previously unrecorded bacterial species.

• Korean Journal of Acupuncture
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• v.28 no.4
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• pp.125-135
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• 2011

Objectives : This study is aimed to evaluate the diagnostic value of Ryodoraku for traditional Korean medicine practice reported in the Korean literature. Methods : A search of seven Korean databases was performed up to May 2011 using the search term 'Ryodoraku(in Korean)'. All clinical studies on diagnostic Ryodoraku characteristics were included. Results : The search yielded 59 studies, of which 5 were considered suitable for this analysis. Four were observational studies. Only one was a controlled trial. Average Ryodoraku score(RS), mean values for each measure point, physiologic limit, number of Pyesaek and Gyeokcha, and pattern classification were used as references for the analysis. Correlations were observed between average RS and idiopathic Parkinson's disease, some sub-groups of respiratory disease, chronic low back pain, and menopause. Some mean values for measure points showed particularly high or low tendencies in patients with idiopathic Parkinson's disease, chronic low back pain, and menopause. Positive correlations were observed between the number of Pyesaek and H-Y stage in idiopathic Parkinson's disease and F2(肝) and the modified Kupperman's index with menopausal women. The four classes, organized based on Ryodoraku pattern, showed differences in various characteristics. Conclusions : Since only five studies met the experimental conditions, this evaluation of the diagnostic value of Ryodoraku in various situations is limited. Future studies should be conducted using various physiologic and pathologic situations.

• Journal of Korean Clinical Health Science
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• v.4 no.4
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• pp.762-768
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• 2016

Purpose. This study was performed on survey related optician's perception of NCS and required jobs to develop curriculum of department of ophthalmic optics Methods. This study was to evaluate the questionnaire survey of 63 opticians working in Optometrist in Daegu Metropolitan City from November 1, 2016 to November 18, 2016. Results. As for the opticians who know about NCS, 23.8% of the respondents answered that the opticians' perception of NCS is very low. For the four required jobs of the technical part, less than 5 years of optometrists ; optometry 73.7% > fitting 47.4% > ophthalmic dispensing 36.8% > lensmeter 5.3%, more than 5 years and less than 10 years of optometrists ; optometry 84.6% > fitting 53.8% > lensmeter 46.2% > ophthalmic dispensing 38.5%, more than 10 years of optometrists ; optometry 67.7% > ophthalmic dispensing 51.4% > lensmeter 19.4% > fitting 16.1%. For the four required jobs of the management, less than 5 years of optometrists ; product 57.9% > service 47.4% > manners 10.6% > sales 5.3%, more than 5 years and less than 10 years of optometrists ; service 76.9% > product 53.9% > manners 46.2% > sales 38.5%, more than 10 years of optometrists ; service 45.2% > manners 42.0% > product 32.3% > sales 19.4%. Conclusions. Although there were 108 required jobs of the technical part and 94 required jobs of the management part, the technical level of the department of ophthalmic optics was satisfactory, but the classes of the management part were insufficient. It will be necessary to actively reflect the needs of industry through curriculums reform.

• Journal of the Korean Chemical Society
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• v.57 no.6
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• pp.778-788
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• 2013

The purpose of this study was to examine the change of the beginning science teachers' perception change through the mentoring program. Participants in this study were four mento-teachers, one university professor, two teachers in doctor, two teacher in doctor's or master's course, and four mentee-teachers who had less than three years teaching experience. We performed five times one to one mentoring for a year. We collected data such as video recordings of mentee-teacher's classes, lesson plans, recording of one to one mentoring and transcription, mento and mentee journals, preliminary-interim-post interview and transcription, and RTOP class observation report. Based on the result of this study, five times mentoring over a year changed mentee-teacher's perception and their teaching practice.

• Journal of The Korean Association For Science Education
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• v.21 no.2
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• pp.289-298
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• 2001

The effect of the instructional approach that asked students to check their problem-solving processes through a paired think-aloud problem solving after presenting molecular-level pictures and a four stage-problem solving strategy was investigated. Four high school classes (N = 191) were randomly assigned to St group (using Strategy individually), SL group (Solver Listener), St-SL group (using Strategy-Solver Listener), and control group. Although the test scores of the St-SL group on strategy performing ability were significantly higher than those of the control group, there was not significant difference for the scores in the multiple-choice algorithmic problems. Regarding the subcategories of strategy performing ability test, students' ability of understanding given of problems and deriving the proper physical quantity was improved, but their ability of setting up subgoals and reviewing their solving process was very low. The preference to the strategy of the St-SL group was more positive than that of the St group.