• Journal of Korean Society on Water Environment
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• v.33 no.4
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• pp.460-473
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• 2017

In order to certificate the contamination assessment of heavy metals in surface sediments from the Nakdong river. Surface sediments were collected of 24 sampling sites (main 14st., tributary 10st.) and analyzed for grain size heavy metals contents. Study area mainly composed of sand (avg. 94.1%) and mean grain size was $1.46{\Phi}$ on average. Heavy metals contents (avg. Al: 12.5%, Zn; 74.4, Cr: 45.3, Li: 26.0, Pb: 17.1, Ni: 10.5, Cu: 7.8, Cd: 0.22 mg/kg) were relatively high contents in the composed of fine sediments. In addition, the results of pearson's correlation coefficient showed that most heavy metals and grain size (silt and clay) were highly correlated. The contents of Zn (6st.) and Ni (1st.) evaluated as moderately polluted, Zn (6st.) evaluated as LEL when compared with sediment quality standard of USEPA and Ontario sediment quality guidelines. Most heavy metals contents were I levels that dose not affected the benthos when compared with sediment pollution evaluation standard of NIER. The results of EX, EF, Igeo and CF showed the contents of Zn, Pb and Cd exceed the background contents and distributing of anthropogenic pollution and evaluated as moderately polluted level. And Nm-08 were relatively high level of contamination in the study area. However as results of PLI (less than 1), all sampling sites were evaluated unpolluted level.

• Journal of Applied Biological Chemistry
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• v.58 no.4
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• pp.345-348
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• 2015

Dried Rehmannia Radix Preparat, produced in different geographic origins of Korea and China, were investigated for the trace element contents using X-ray fluorescence spectrometry. When the estimated data for 35 kind of elements including K, P, S, Cl, Si, Al, Fe, Sn, etc on 143 samples were analyzed by canonical discrimination technique, the average classification correct rate was 92.3% and the significance was less than 0.0001. In case of reducing the number of elements for statistic analysis from 35 to 8 and to 3, the correct rates were also reduced to 88.1% and to 84.6%. The correct rate for Chinese samples ranged from 94.6-96.0%, while those for Korean ranged from 72.5-89.9%.

• The Journal of the Korea Contents Association
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• v.14 no.2
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• pp.270-282
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• 2014

This study examined the influence of case management implementation factors on mentally ill person's quality of life based on case managers and clients who are from Mental Health Total Care voucher agencies. Hierarchical Lineral Model was used to verify client factors, case manager factors, agency factors and service providing factors. For the first time in our nation, major findings were found that case manager's career and intervention range have influence on mentally ill persons's quality of life, and that there is no influence for the caseload below 20 cases per one person. The practical implication was suggested about usefulness of case manager's career, caseload and intervention range within local social community system.

• The Journal of the Korea Contents Association
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• v.11 no.1
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• pp.216-224
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• 2011

This study conducted a secondary analysis by using original data of performed by Korea Institute for Health and Social Affairs to determine factors affecting health-related quality of life in the elderly. The results were as follows. For medical health condition, it became longer in endocrine diseases and cardiovascular diseases. In the case of functional health condition, subjects with musculoskeletal diseases showed higher functional health condition. Subjective health condition, while it became worse in digestive diseases and musculoskeletal diseases in the order, it recorded the best score when subjects did not have any musculoskeletal disease. Quality of life, while it became lower in endocrine diseases in the order, it was the highest when subjects did not have any musculoskeletal disease. Thus, increase of subjective health status for the elderly is important in the future.

• The Journal of the Korea Contents Association
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• v.13 no.2
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• pp.108-126
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• 2013

The purpose of this study is to develop the basic scales of festival quality. We conducted a content analysis in the discourse of KINDS(Korea Integrated News Database System) and derived five constituent factors, basic quality measures of local festivals through the extensive literature review. We named these qualities "Festival BASICQUAL" that is consist of Infrastructure, Connectedness, Passion, Theme, Culture. We conducted the empirical analysis for the participants in "Geumsan Insam Festival" to verify the "Festival BASICQUAL" As the result, Infrastructure, Connectedness, Culture affected positively on Festival Attachment among all BASICQUALs. However, Passion and Theme did not positively affected on the dependent variable. And then, Festival Attachment positively affected on Festival Satisfaction, while Festival Satisfaction also affected positively on Behavior Intention. This study developed the basic quality concerned with local festivals which is crucial fundamentals to quantify Festival BASICQUAL through empirical study. The proper applications and usage of these newly introduced local festival qualities enable to acquire the sustainable competitive advantage in local festival.

• Journal of Digital Contents Society
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• v.17 no.2
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• pp.89-96
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• 2016

SVC(Scalable Video Coding), which is one form among video encoding technologies, makes video streaming with the various frame rate, resolution, and video quality by combining three different scalability dimensions: temporal, spatial, and video quality scalability. As the above SVC-encoded video streaming consists of one base layer and several enhancement layers, and a wireless AP(Access Point) chooses and sends a suitable layer according to the received power from the receiving terminals in the changeable wireless network environment, the receiving terminals supporting SVC are able to receive video streaming with the appropriate resolution and quality according to their received powers. In this paper, after the performance analysis for the received power, packet loss rate, PSNR(Required Peak Signal to Noise Ratio), video quality level and amount of received video data based on the number of SVC layers was performed, an efficient method for selecting the number of SVC layer satisfying the RSNR and minimizing the amount of received video data is proposed.

• The Journal of the Korea Contents Association
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• v.15 no.5
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• pp.436-443
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• 2015

The purpose of this study was to develop a self-diagnostic linearity quality control techniques of computed tomography (CT) by using measured CT number values from the various concentrations of iodine contrast media (CM) is diluted with distilled water under each condition of the tube voltage. The equipment was used for four-channel MDCT, the iodine concentration were using 300 mgI/ml, 350 mgI/ml, 370 mgI/ml and 400mgI/ml. Dilution of CM in distilled water was increased by each 5% until the maximum CT number values were measured. We applied the tube voltages for 90 kVp, 120 kVp, 140 kVp. As a result, we was obtained to the nearest linearity as 0.993 of correlation coefficient between the iodinated CM from 5% to 25% in 400 mgI/ml and the CT number values by 90 kVp. In conclusion, the proposed self-diagnostic linearity quality assurance technique by using iodine CM can be utilized to replace the AAPM CT performance phantom.

• The Journal of the Korea Contents Association
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• v.9 no.6
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• pp.9-16
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• 2009

According to the construction of infrastructure for the water resource management services, the importance of the eco-friendly reservoir tank management is being spotlighted. In this paper, we proposed the eco-friendly reservoir tank management using prediction for improving the water quality and on-line managing efforts of reservoir tanks. The proposed method defined the context and environment of the reservoir tank and predicted the profited service according to the pump motion, the solar battery, the chemicals, the water level, the telephone line, and the modem using collaborative filtering. To evaluate the performance of the eco-friendly reservoir tank management system using prediction, we conducted sample T-tests so as to verify usefulness. This evaluation found that the difference of satisfaction by service was statistically meaningful, and showed high satisfaction. Accordingly, the satisfaction and the quality of services will be improved the efficient prediction by supporting the context information as well as the environment information.

• Korean Journal of Pharmacognosy
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• v.37 no.4 s.147
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• pp.241-245
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• 2006

Morinda officinalis How. (Rubiaceae) has been used as tonic, warming, sex impulse and anti-inflammatory agents. Two known anthraquinones, rubiadin-1-methyl ether (I) and rubiadin (II) were isolated from root of M. officinalis. Their structures were identified using NMR and literature comparisons. The contents of I in eighteen M. officinalis were evaluated by HPLC-PDA. Chromatography was performed using a reversed-phase system with Luna $C_{18}$ (2) column and acetonitrile-water (50:50, v/v) with a flow rate of 1.0 mL/min under UV 280 nm. Under these conditions, the content of rubiadin-1-methyl ether was 0.013%.

• Korean Journal of Pharmacognosy
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• v.38 no.1
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• pp.15-18
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• 2007

Scrophulariae Radix(Scrophulariaceae) is a perennial growing in all parts of korea, China and Asia. It has been used as a folk medicine in treating guttural diseases acting as an antiphlogistics, antipyretics and analgesics. In this report, to compare with Korea and China product, quantitative analysis of harpagoside and p-methoxy cinnamic acid(4-MCA) was performed by HPLC method. Using a Luna $C_{18}(2)$ column, we carried out quantitative analysis with 0.1% phosphoric acid in water and acetonitrile as gradient condition. Harpagoside and 4-MCA were detected at retention time of about 11.5 and 15.0 min, respectively. Contents of harpagoside and 4-MCA proved that Korean products were higher than China more than twice.