• Journal of the Korean Society of Environmental Restoration Technology
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• v.18 no.3
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• pp.97-107
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• 2015

Research was initiated to investigate a vegetation characteristics of the species of ground cover plants mixed with herbeceous and woody plants on a cut slope. 4 different ground cover plants (Miscanthus sinensis var. purpurascens, Pennisetum alopecuroides, Festuca arundinacea and Zoysia japonica) were seeded at the same rate of $10.0g/m^2$ with herbaceous plants (Lotus corniculatus var. japonicus, Dianthus sinensis, Aster yomena, Chrysanthemum zawadskii and Coreopsis drummondii L) at the total seeding rate of $7.5g/m^2$ and native woody plants (Lespedeza bicolor Turcz, Indigofera pseudo-tinctoria and Albizzia julibrissin) at the total seeding rate of $7.5g/m^2$, respectively. This experiment was treated with 3 replications on a randomized block design. Data such as surface coverage rate(%), the germinating number, plant height and visual quality were analyzed. There were no statistic differences observed in the soil hardness and the soil moisture content while a significant difference was observed in the surface coverage rate and the germinating number. The surface coverage rate and the germinating number were significantly high in the Pennisetum alopecuroides plot when compared with the Miscanthus sinensis var. purpurascens plot, the Festuca arundinacea plot and the Zoysia japonica plot, respectively from the viewpoint of ground covers. Especially, the surface coverage rate was considerably low in the Festuca arundinacea plot. However, the surface coverage rate and the germinating number were no statistic differences observed in this treatment from the viewpoint of herbaceous and woody plants. Also, both of the plant height and visual quality were high in the Pennisetum alopecuroides plot when compared with the Miscanthus sinensis var. purpurascens plot, the Festuca arundinacea plot and the Zoysia japonica plot, respectively. We concluded that Pennisetum alopecuroides was the optimum plant from the treated ground covers mixed with native woody and herbaceous plants for the balanced emergence from the viewpoint of the ecological slope vegetation.

• Journal of Korea Water Resources Association
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• v.41 no.5
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• pp.545-558
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• 2008

This study estimated the error involved in the areal average rainfall derived from incomplete radar information due to radar partial coverage of a basin or sub-basin. This study considers the Han-River Basin as an application example for the rainfall observation using the Ganghwa rain radar. Among the total of 20 mid-sized sub-basins of the Han-River Basin evaluated in this study, only five sub-basins are fully covered by the radar and three are totally uncovered. Remaining 12 sub-basins are partially covered by the radar to result in incomplete radar information available. When only partial radar information is available, the sampling error decreases proportional to the size of the radar coverage, which also varies depending on the number of clusters. Conditioned that the total area coverage remains the same, the sampling error decreases as the number of clusters increases. This study estimated the sampling error of the areal average rainfall of partially-covered mid-sized sub-basins of the Han- River Basin, and the results show that the sampling error could be at least several % to maximum tens % depending on the relative coverage area.

• Korean Journal of Clinical Pharmacy
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• v.22 no.3
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• pp.239-250
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• 2012

In recent years, national health insurance(NHI) coverage had been expanded gradually for cancer as a severe disease requiring high level of medical expenditure, to reduce patient's financial burden. But, subjective burdens level for out-of-pocket(OOP) money expense are still considerable owing to high medical cost and decent numbers of services not covered by benefit plan. This study aimed to investigate OOP medical expenditures and identify factors influencing subjective financial burden in cancer patients. A 28-items questionnaire for self-reporting by responders was designed to satisfy study goal and finalized following by one pilot study and experts' verification process. Subjects were enrolled during July to October 2010 through regular meetings organized by five patient or patient-advocacy groups had acknowledged the study purpose. Subjects who aged 20 or more, have histories of cancer diagnosis and anticancer drug use, and voluntarily agreed to participate in this study were recruited. Total 107 subjects included in the analysis have cancer lesions in breast, colon, kidney, liver or stomach at the stages from I to IV. Approximately 73% of them has passed less than 5 years since cancer diagnosis. For the OOP medical expenditure regarding cancer, less 6 million won was in 31%, 6-15 million won in 35% and more than 15 million won in 28% of responders, and more than half responders(58%) felt financial burden subjectively. 63% of responders had subscribed commercial insurances, resulting in money receipts of more than 10 million won since cancer diagnoses in 76% of responders. Logistic regression results showed significant differences in subjective OOP financial burden level depending on gender, household income level, benefit type, commercial insurance money receipt degree, year cancer diagnosed, cancer lesion, therapy type, duration of anticancer drug use, drug listing in national formulary, total OOP medical expenditure and total OOP anticancer drug expense. They had mixed feelings both wishes to expand NHI coverage to reduce financial burden(70%) and no willingness to increase premium(59%). This result suggested that NHI might direct future strategies to reduce absolute total OOP medical cost and expand benefit plan coverage in higher burden groups in particular.

• Journal of Microbiology and Biotechnology
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• v.24 no.6
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• pp.812-822
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• 2014

Metagenomic analysis of the human intestinal microbiota has extended our understanding of the role of these bacteria in improving human intestinal health; however, a number of reports have shown that current total fecal DNA extraction methods and 16S rRNA universal primer sets could affect the species coverage and resolution of these analyses. Here, we improved the extraction method for total DNA from human fecal samples by optimization of the lysis buffer, boiling time (10 min), and bead-beating time (0 min). In addition, we developed a new long-range 16S rRNA universal PCR primer set targeting the V6 to V9 regions with a 580 bp DNA product length. This new 16S rRNA primer set was evaluated by comparison with two previously developed 16S rRNA universal primer sets and showed high species coverage and resolution. The optimized total fecal DNA extraction method and newly designed long-range 16S rRNA universal primer set will be useful for the highly accurate metagenomic analysis of adult and infant intestinal microbiota with minimization of any bias.

• Molecules and Cells
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• v.20 no.2
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• pp.201-209
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• 2005

We have constructed an AFLP-based linkage map of Japanese red pine (Pinus densiflora Siebold et Zucc.) using haploid DNA samples of 96 megagametophytes from a single maternal tree, selection clone Kyungbuk 4. Twenty-eight primer pairs generated a total of 5,780 AFLP fragments. Five hundreds and thirteen fragments were verified as genetic markers with two alleles by their Mendelian segregation. At the linkage criteria LOD 4.0 and maximum recombination fraction 0.25(${\theta}$), a total of 152 markers constituted 25 framework maps for 19 major linkage groups. The maps spanned a total length of 2,341 cM with an average framework marker spacing of 18.4 cM. The estimated genome size was 2,662 cM. With an assumption of equal marker density, 82.2% of the estimated genome would be within 10 cM of one of the 230 linked markers, and 68.1% would be within 10 cM of one of the 152 framework markers. We evaluated map completeness in terms of LOD value, marker density, genome length, and map coverage. The resulting map will provide crucial information for future genomic studies of the Japanese red pine, in particular for QTL mapping of economically important breeding target traits.

• Archives of Plastic Surgery
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• v.45 no.5
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• pp.418-424
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• 2018

Background Complication rates after flap coverage for pressure ulcers have been high historically. These patients have multiple risk factors associated with poor wound healing and complications including marginal nutritional status, prolonged immobilization, and a high comorbidities index. This study utilizes the National Surgical Quality Improvement Program (NSQIP) to examine perioperative outcomes of flap coverage for pressure ulcers. Methods Data from the NSQIP database (2005-2015) for patient undergoing flap coverage for pressure ulcers was identified. Demographic, perioperative information, and complications were reviewed. One-way analysis of variance and Pearson chi-square were used to assess differences for continuous variables and nominal variables, respectively. Multivariate logistic regression was performed to identify independent risk factors for complications. Results There were 755 cases identified: 365 (48.3%) sacral ulcers, 321 (42.5%) ischial ulcers, and 69 (9.1%) trochanteric ulcers. Most patients were older male, with some degree of dependency, neurosensory impairment, high functional comorbidities score, and American Society of Anesthesiologists class 3 or above. The sacral ulcer group had the highest incidence of septic shock and bleeding, while the trochanteric ulcer group had the highest incidence of superficial surgical site infection. There was an overall complication rate of 25% at 30-day follow-up. There was no statistical difference in overall complication among groups. Total operating time, diabetes, and non-elective case were independent risk factors for overall complications. Conclusions Despite patients with poor baseline functional status, flap coverage for pressure ulcer patients is safe with acceptable postoperative complications. This type of treatment should be considered for properly selected patients.

• Korean Journal of Ecology and Environment
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• v.42 no.4
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• pp.502-509
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• 2009

In this study a total of 27 stream sites, at 1 km intervals, were monitored for simple physicochemical water characteristics, land coverage patterns, and stream environment characteristics using the Habitat-riparian Indexing System (HIS), in the Yangsan Stream. The HIS has been tested in previous research, resulting in some identification of advantages in the application to the stream ecosystems data. Even though reliable stream environment characterization was possible using HIS, there was no information about the application of this tool to present continuity of environmental changes in stream systems. Also the necessity was raised to compare the results of HIS application with land coverage information in order to provide useful information in management strategy development. The monitoring results of this study showed that changes of environmental degradation were well represented by HIS. Especially, stream environment degradation due to construction was relatively well reflected in the HIS monitoring results, and the main causality of Yangsan Stream degradation was expansion of the urbanized area. In addition, there were significant relationships between the HIS scores and land coverage information. Therefore, it is necessary to prepare appropriate options in controlling or managing the expansion of the industrialized areas in this stream basin in order to improve the stream environment. For this purpose, ensemble utilization of HIS results, water quality, and geographical information, resulting in integration with remote sensing processes can be possible.

• Nuclear Engineering and Technology
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• v.44 no.4
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• pp.421-428
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• 2012

Analog instrument and control systems in nuclear power plants have recently been replaced with digital systems for safer and more efficient operation. Digital instrument and control systems have adopted various fault-tolerant techniques that help the system correctly and safely perform the specific required functions regardless of the presence of faults. Each fault-tolerant technique has a different inspection period, from real-time monitoring to monthly testing. The range covered by each faulttolerant technique is also different. The digital instrument and control system, therefore, adopts multiple barriers consisting of various fault-tolerant techniques to increase the total fault detection coverage. Even though these fault-tolerant techniques are adopted to ensure and improve the safety of a system, their effects on the system safety have not yet been properly considered in most probabilistic safety analysis models. Therefore, it is necessary to develop an evaluation method that can describe these features of digital instrument and control systems. Several issues must be considered in the fault coverage estimation of a digital instrument and control system, and two of these are addressed in this work. The first is to quantify the fault coverage of each fault-tolerant technique implemented in the system, and the second is to exclude the duplicated effect of fault-tolerant techniques implemented simultaneously at each level of the system's hierarchy, as a fault occurring in a system might be detected by one or more fault-tolerant techniques. For this work, a fault injection experiment was used to obtain the exact relations between faults and multiple barriers of faulttolerant techniques. This experiment was applied to a bistable processor of a reactor protection system.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.12
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• pp.798-806
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• 2020

Dental sealant is a procedure to prevent dental caries on the occlusal surface of healthy teeth. Raw data from the 6th-7th Korean National Health and Nutritional Examination Survey (KNHANES) were analyzed. This study was conducted to provide basic data which is necessary for the national health care project and for expanding the standards of coverage for the Dental sealant procedure. In this study, subjects were a total of 4,366 children from the age of 6 to 18 and surveyed for the Amount of Received Dental sealant and rate of Received Dental sealant. In 2012, the coverage rate for pit and fissure sealing procedures differed significantly in terms of age, residential area and average monthly income. This coverage varied as per average monthly income in 2014 and as per age and average monthly income in 2017 (P < 0.05). In 2014, average monthly income had a significant influence on the coverage rate, while age and average monthly income had a significant influence on it in 2017 (P < 0.05). These findings suggest that in order to increase the sealing procedure coverage, continuous promotion of dental sealant projects, reduction of copayments, inclusion of varied tooth types and age groups, expansion of coverage to isolated areas and inclusion of socially disadvantaged groups are necessary.

• Journal of Technologic Dentistry
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• v.38 no.1
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• pp.9-22
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• 2016

Purpose: The Purpose of this study are to describe the Dental field of present health insurance for custom-made prosthetic implant by dental technicians' work. Results: A total of 300 dental technicians working at dental laboratories in Korea were randomly selected and surveyed, 206(68.7%) of them were used for the statistical analysis. Conclusion: Average daily working time was 10 hours 66%. The average cumulative credit of the clinic for dental prosthesis fabrication rates was Less than 10 million won(21.8%), 10~80 million won(11.7%), more than one hundred million won(1.5%). Remake dental prosthesis was one more than the monthly average of 98.5%. Causes of remake dental prosthesis was dentist impression 83% but did not pay 62.5%. Dental technicians Implant production period was 7 days(48.5%), 10 days(35%) was commissioned by dentists production time is 5 days(46.1%), 7 days(36.5%). President of dental laboratories 3.86 points and dental technicians 3.06 points knew differently about starting of implant health insurance coverage(p<.001). They alike were in favor of insurance coverage for the implant. Dental technicians were lower by 2.36 points for work do you know whether your health insurance application of dental prostheses. Dental technicians are 2.16 points on whether confidence in the pores payment of insurance coverage dental prosthesis, dental laboratory president was lower by 1.85 points. They are very low with 1.97 points on whether confidence in the rate payment of health insurance coverage dental prosthesis(p<.01). The implant prosthesis abutment selected, the abutments designed, design of the implant upper prosthetic, the upper prosthetic fitting dental technicians participate of dental laboratory president showed higher score (p <.05). Conclusion: Hours of dental technicians were making this short period of remake dental prosthesis-related dental prosthesis. Dental clinic and a detailed representation of the dental prosthodontic fabrication request is required for communication between the laboratory in order to reduce the remake of a dental prosthesis, dental insurance coverage written dental prosthodontic fabrication request should be legislated. Implant classification standard medical practice 1-3 Step conduct a thorough costing a total of no. 73 of the correct classification standard medical practice in addition to eight times defined by the act of dental technicians should be defined.