• Korean Journal of Environmental Biology
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• v.30 no.3
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• pp.164-172
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• 2012

In this study, samples were collected from Lake Soyang in Kangwon-do in order to isolate novel Flavobacterium sp. strains. Totally, 21 strains of Flavobacterium showing 97%~98% similarity in 16S rRNA were selected and thoroughly investigated individual characteristics and ecological differences. As results, we could categorize Flavobacterium isolated from Lake Soyang into four major node groups, where most of Flavobacterium belonged to single group. Next, fatty acid analyses were performed demonstrating similar pattern of the majority of fatty acids as either iso $C_{15:0}$ or summed feature 3 (comprised $C_{16:1}$ ${\omega}7c$ and/or $C_{16:1}$ ${\omega}6c$) of the other Flavobacterium. However, other phenotypic data were different from the other Flavobacterium sp. Group. Our data showed that genetically related species of Flavobacterium have been distributed in Lake Soyang. Those Flavobacterium strains were phenotypically different from previously reported genus of Flavobacterium species. Taken together, we speculated that isolated Flavobacterium strains from Lake Soyang might be ecologically important members to maintain ecosystem.

• Mycobiology
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• v.42 no.2
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• pp.174-180
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• 2014

We analyzed the genetic diversity of Cylindrocarpon destructans isolates obtained from Korean ginseng (i.e., Panax ginseng) roots by performing virulence tests and nuclear ribosomal gene internal transcribed spacer (ITS) and mitochondrial small subunit (mt SSU) rDNA sequence analysis. The phylogenetic relationship analysis performed using ITS DNA sequences and isolates from other hosts helped confirm that all the Korean C. destructans isolates belonged to Nectria/Neonectria radicicola complex. The results of in vivo and ex vivo virulence tests showed that the C. destructans isolates could be divided into two groups according to their distinctive difference in virulence and the genetic diversity. The highly virulent Korean isolates in pathogenicity group II (PG II), together with foreign isolates from P. ginseng and P. quinquefolius, formed a single group. The weakly virulent isolates in pathogenicity group I, together with the foreign isolates from other host plants, formed another group and exhibited a greater genetic diversity than the isolates of PG II, as confirmed by the mt SSU rDNA sequence analysis. In addition, as the weakly virulent Korean isolates were genetically very similar to the foreign isolates from other hosts, they were likely to originate from hosts other than the ginseng plants.

• Journal of Digital Convergence
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• v.14 no.3
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• pp.299-307
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• 2016

This Convergence study aimed to investigate the effects of changing brainwave neurofeedback training on life stress and depression in female college students. Twenty-six of the subjects were selected into the experimental group and the control group respectively intervention for 8 weeks, the following results were obtained. First, experimental group and control group presented statistical significant difference before and after intervention on life stress, and life stress in experimental group was statistical significantly decreased than control group. Second, experimental group and control group presented statistical significant difference before and after intervention on depression, and depression in experimental group was statistically significantly decreased than control group. The results obtained from this study expect us that applying the neurofeedback training for the decrease of life stress and depression, has a positive effect.

• Journal of Korean Society for Quality Management
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• v.46 no.3
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• pp.539-550
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• 2018

Purpose: The purpose of this study was to find meaningful patient groups of disease using foreign patients data and analyze implemented test of the patient groups. Methods: The data was collected by foreign patients' EMR data of K university hospital. The author proposed tree-form patients' characteristic diagram through statistical methods that association rule, proportion test, clustering using prescription information and questionnaire information. Results: This study's analysis process was applied high blood data and diabetes data. Analysis showed other characteristic of meaningful patient groups in high blood and diabetes. In high blood, test implementation rate of patient group showed the differences. And in diabetes, test implementation rate of patient group and implemented test list showed differences. Conclusion: The result of this study can play a role as basic data that can be clinical testing standard in preventive aspect. Eventually, 5 dimensions of SERVQUAL will be improved by this study's process.

• Journal of Society of Preventive Korean Medicine
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• v.16 no.3
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• pp.75-87
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• 2012

Objectives : This study was performed to investigate the knowledge on contacting experiences to foreign patients, the equipments and requirements to make the vitalization method for the oriental medical tourism for foreign patients. Methods : We adopted the focusing group interviews on the oriental medical doctors, nurses and personnels who had the experiences to deal with the oriental medical tourism. Results : For 3 parts, translation into each country's language in program, hospital information, treatment information and homepage should be done and consideration into each country's culture is very important part to know medical tourism patients and prepare the adequate products, and lastly the translater or medical coordinator plays a very important role to connect the hospital personnels with medical tourism patients. Conclusions : Translation in to each country's language concerning medical tourism material and understanding on one's country's culture and a medical coordinator are very important constituents for a successful medical tourism.

• The Korean Journal of Applied Statistics
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• v.23 no.1
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• pp.207-218
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• 2010

Generalized additive model(GAM) is the statistical model that resolves most of the problems existing in the traditional linear regression model. However, overfitting phenomenon can be aroused without applying any method to reduce the number of independent variables. Therefore, variable selection methods in generalized additive model are needed. Recently, Lasso related methods are popular for variable selection in regression analysis. In this research, we consider Group Lasso and Elastic net models for variable selection in GAM and propose an algorithm for finding solutions. We compare the proposed methods via Monte Carlo simulation and applying auto insurance data in the fiscal year 2005. lt is shown that the proposed methods result in the better performance.

• The Journal of Korean Obstetrics and Gynecology
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• v.33 no.2
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• pp.13-28
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• 2020

Objectives: This study was conducted to find out research trends for uterine leiomyoma and to recognize the efficacy and safety of herbal medicine treatment for uterine leiomyoma and to help in the clinical research of herbal medicine treatment for uterine leiomyoma in the future. Methods: Based on eight domestic and foreign databases, We analyzed the Randomized Controlled Trials using herbal medicine for uterine leiomyoma. Data retrieval was carried out on September 10, 2019 and the latest five-year papers were included. The treatment group was treated with herbal medicine and the control group was treated with western medicine. Results: 473 studies were searched in domestic and foreign databases, and 12 studies were finally selected. Although the indicators varied, all studies used total efficiency rate as indicators. In all 12 studies, the treatment group treated with herbal medicine was more effective than the control group treated with Western medicine.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.38 no.11
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• pp.9-18
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• 2001

Currently most of VPNs within internet has only capability to protect cooperate data. Recently, various types of VPNs are being studied based on the concept of SCG(Secure Communication Group). This paper analyses the problems of path-definition method and area-definition method of VPNs using SCG technology, and discusses the possible models among VPNs using SCG technology. This paper proposes the hierarchal VPN configuration method using SCG number and internet based area definition method, and analyze the characteristics of the proposed VPN model on the point of the authentication frequency and the number of managements keys.

• Journal of Microbiology and Biotechnology
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• v.19 no.11
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• pp.1281-1287
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• 2009

The distribution pattern of the phylum Acidobacteria, a previously uncultured bacterial group, was investigated by molecular ecological analyses of global soil samples collected from pristine ecosystems across five continents. Acidobacterial 16S rDNAs were observed in almost all soil samples, and members of acidobacterial primer group A were detected in all samples that harbored the phylum Acidobacteria. Other primer groups, Y, G, and O, showed limited distribution patterns. We further divided the primer groups into acidobacterial subdivisions (class-level). Subdivisional distribution patterns were determined by comparing the observed T-RFs with theoretical T-RFs predicted by in silico digestion of acidobacterial 16S rDNAs. Consistent with the PCR results obtained with subgroup-specific primers, T-RFLP analyses showed that acidobacterial subdivision 1 belonging to primer group A was present in the majority of the soil samples. This study revealed that the phylum Acidobacteria could be globally distributed. At the subdivisional level, acidobacterial subdivision 1 might be the most widely distributed group in this phylum, indicating that members of subdivision 1 might be adapted to various soil environments, and members belonging to other subdivisions might be restricted to certain geographic regions or habitats.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.11
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• pp.4543-4552
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• 2010

A leader is a special process who roles as the coordinator within multiple processes of a group. In a distributed system, leader election is the procedure of electing a coordinator. This is a very important issue for building fault-tolerant distributed systems. When two normal mobile ad hoc networks are merged, there are two leaders. This violates the safety property, so a mechanism to detect and handle are required. In mobile ad hoc distributed computing system, we propose a leader competition protocol and to prove the temporal logic to it. This solution is based on the group membership detection algorithm.