• Journal of the Korean Society of Hazard Mitigation
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• v.11 no.1
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• pp.51-57
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• 2011

Irregular distributions of limestone cavity in Gang-Won province area may cause unexpected accidents from reduced serviceability or failure of structure. It is requested that an appropriate ground reinforcement method should be used to improve bearing capacity of structure, and the method should also be satisfied with environmental requirements. Among several methods used for foundation constructions in cavity area, Rod Jet Pile(RJP) method has been widely used. While the RJP method was used to improve bearing capacity for the railway bridge foundations, water pollutions of drinking water as well as fishery located adjacent to this project area were occurred. The main reason of the water pollution was cement runoff used in cement mortar during injecting material in RJP method. Laboratory tests were performed to prevent water pollution. The compaction mortar method using low movable material was selected for this project. The quality of water at a fishery adjacent to the site and the compressive strength of cores taken from the construction site were measured. Test results show that the water pollutions was minimized, and the average compressive strength of foundation material was over 5 MPa. As a result of this study, compaction mortar method can be used to ensure the bearing capacity of foundation and to prevent environment pollutions.

• Journal of Chitin and Chitosan
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• v.22 no.4
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• pp.254-263
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• 2017

In order to improve the utilization of seaweeds, two kinds of mixed seasoning concentrates (KMS, MKS) were prepared with Kjellmaniella crassifolia and Mytilus coruscus as main ingredients. Fermentation experiments were carried out at $4^{\circ}C$ for 70 days with Kimchi. As a result, SK-A showed a decrease in pH and an increase in acidity. Salinity was not significantly different after 70th day. Reducing sugar content was higher in mixed seasoning group. Lactic acid bacteria Leuconostoc sp. and Lactobacillus sp. Increased in the control group after 20 days of fermentation. The lightness was higher in the control group from the early stage of dipping to 30 days, and the degree of yellowing was higher than that of SK-B group from 20 days. The hardness of the SK-A group was high at the early stage of immersion and at 10th day. The content of aspartic acid and glutamic acid in free amino acid SK-A group was significantly higher (p<0.05). The content of sweet amino acids was significantly higher in the SK-A group on the 0th, 10th, and 30th days of fermentation than the other groups (p<0.05). The sensory test results showed that SK-A showed the most favorable taste. As a result of reviewing the above results, it is expected that SK-A group immersed in 100 g of seasoning liquid KMS made from Kjellmaniella crassifolia and Mytilus coruscus as a subordinate material will provide taste and nutrition to consumers.

• Economic and Environmental Geology
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• v.54 no.5
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• pp.561-572
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• 2021

Aggregate collection is taking place in many areas in Korea, resulting in large cut slopes or large amounts of cut rocks. If the development site for such aggregate collection is a stratum accompanied by sulfide minerals, Acid Rock Drainage (ARD) may occur, which may cause environmental pollution in the development site and surrounding areas. As a result of the study on forest aggregate samples, most of the samples were classified as acid-forming potential samples, and among them, some samples from Gwangju, Goyang, and Sokcho were classified as potential acid-generating samples. This can be expected to affect the quality of aggregates when a large amount of aggregate is used in the future. Therefore, it is judged that these forest aggregates need to be managed when they are used. By predicting the occurrence of ARD through the acid-generating ability test, it is expected that economic losses that may occur in the future can be reduced, and it is judged that the problem of surrounding environmental pollution can be further alleviated.

• Journal of Soil and Groundwater Environment
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• v.26 no.6
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• pp.130-143
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• 2021

Wetlands are one of the most representative groundwater dependent ecosystems(GDEs) that require access to groundwater on a permanent or intermittent basis to maintain their biological communities and ecological processes. In this study, the seasonal characteristics of the GDEs in Baekseok Reservoir Wetland were evaluated through the monitoring of the temporal and spatial community of benthic macroinvertebrates in the wetland. The appearance of benthic macroinvertebrates appearance was changed seasonally depending on environmental factors such temperature, precipitation and water level for their habitat and it also showed the clear spatial difference in the wetland. The scores of Diversity index(H'), Richness Index (R1) and the Ecological score of benthic macroinvertebrates (TESB/AESB) were relatively high at St.3 and 4(i.e., north area) where groundwater inflows into wetland(i.e., high ²²²Rn conc.). The statistical analysis (ANOVA test and PCA) investigated the correlation among the benthic macroinvertebrates' community, groundwater level, wetland water level and water quality. The results showed that the community of benthic macroinvertebrates at St. 3 and 4 in Baekseok Reservoir Wetlands was spatially dependent on groundwater level and groundwater inflow. The characterization and assessment of GDEs requires understanding the hydrological, biogeochemical and biological process and this study will provide information for characterization and assessment of GDEs.

• Korean Journal of Remote Sensing
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• v.37 no.5_1
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• pp.1149-1161
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• 2021

With a trend of the utilization of computer vision for satellite images, cloud detection using deep learning also attracts attention recently. In this study, we conducted a U-Net cloud detection modeling using SPARCS (Spatial Procedures for Automated Removal of Cloud and Shadow) Cloud Dataset with the image data augmentation and carried out 10-fold cross-validation for an objective assessment of the model. Asthe result of the blind test for 1800 datasets with 512 by 512 pixels, relatively high performance with the accuracy of 0.821, the precision of 0.847, the recall of 0.821, the F1-score of 0.831, and the IoU (Intersection over Union) of 0.723. Although 14.5% of actual cloud shadows were misclassified as land, and 19.7% of actual clouds were misidentified as land, this can be overcome by increasing the quality and quantity of label datasets. Moreover, a state-of-the-art DeepLab V3+ model and the NAS (Neural Architecture Search) optimization technique can help the cloud detection for CAS500 (Compact Advanced Satellite 500) in South Korea.

• Journal of the Korea Convergence Society
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• v.12 no.5
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• pp.327-335
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• 2021

The aim of this study is to examine the effectiveness of group art therapy on the depression and job satisfaction of local government officials. The study was conducted from March 2017 to March 2018 and the participants of this study were twenty public officials in North Chung-Chung Province. They randomly placed in two different group : 10 in experimental group, 10 in control group. To measure the effects of group art therapy, K-BDI and Job Satisfaction Scale were used a week before and a week after the intervention of group art therapy program. Data was analyzed using paired t-test with SPSS Statistics 23.0. The result was as follows : First, there was significant change to alleviate Depression. Second, there was significant change to increase job satisfaction. This study provides empirical evidence of effectiveness of group art therapy. The findings in this study are not only helping public officials' individual mental health but also enhancing productivity of local government and the quality of service to local residents in Chung-Chung province area.

• Korean Journal of Breeding Science
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• v.49 no.4
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• pp.396-402
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• 2017

'Daname' is a foxtail millet(Setaria italica Beauv.) variety developed and registered by Department of Southern Area Crop Science, NICS, RDA in 2014. This variety which collected from IT252182 was developed through pure line selection. 'Daname' is a early-maturing variety having 100 days of growth period from seeding to harvesting in Milyang of Korea. The culm length is about 97 cm which is 20cm shorter culm length than standard variety 'Hwanggeumjo', and it showed tolerant to lodging in field. The panicle shape is a cylindrical and the length is about 19cm. According to the grain, seed color and dehusked grain colors are orange and yellow and endosperm characteristic is non-glutinous. The yield performance of this variety was about $3.81t\;ha^{-1}$ in local adaptability test from 2013 to 2014 and it showed similar with standard variety 'Hwanggeumjo'. As the addition amount of 'Daname' in rice increased from 0% to 30% and 100%, the antioxidant ability of 'Daname' added rice and hardness/stickiness balances were increased. But we could not find out the difference of hardness/stickiness balances between 0%and 10% addition. So, 10% addition amount was concluded to increase antioxidant ability regardless eating quality of cooked rice. (Variety registration No. 6243)

• Food Engineering Progress
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• v.15 no.4
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• pp.376-381
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• 2011

The baking performance of Cudrania tricuspidata leaf powder as a value-added food ingredient was investigated in a model system of sponge cakes. Cudrania tricuspidata leaf powder was incorporated into cake batter at 5 levels (0, 5, 10, 15, and 20%, w/w) by adding equivalent amount based on total weight of wheat flour. The specific volume, height, moisture content, volume index, and symmetry index of sponge cakes decreased significantly with the increase in Cudrania tricuspidata leaf powder content (p < 0.05). Sponge cakes became darker and firmer with increase in Cudrania tricuspidata leaf powder content (p < 0.05), as indicated by decrease in the $L^*$ and increase in the firmness measured by the texture measuring instrument. Total polyphenol content also increased gradually as the Cudrania tricuspidata leaf powder content increased. Finally, the consumer acceptance test indicated that addition of Cudrania tricuspidata leaf powder up to 10% in the formulation of sponge cakes did not significantly influence the consumers' acceptability with respect to taste and flavor. In addition, the overall acceptability was not different from each other for control and 5% sample (p > 0.05).

• Korean Journal of Breeding Science
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• v.43 no.6
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• pp.587-590
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• 2011

A new sesame variety 'Yunheuk' was developed from Yeongnam Agricultural Research Institute in 2007. A cross was made by 'Yoosung' with weak disease resistance and 'Kunheuk' with high yield capacity & quality, followed by pedigree selection, yield test and regional yield trial (RYT) by the sesame breeding team at the National Institute of Crop Science and Yeongnam Agricultural Research Institute up to 2007. The variety showed higher lodging resistance and more dark seed coloring rather than that of check variety 'Yangheuk'. Average stem length and the number of capsules per plant is 118 cm, 79 cm respectively. Its 1,000 grains weight is about 2.67 g indicating 0.10 g lower than that of 'Yangheuk', and its oil content is about 46.4%. 'Yunheuk' also contains total 2.59 mg/g of such lignans as sesamin and sesamolin. And its dark color density ($L^*$ Value) of seed coat is 22.43 which was about 10% lower than that of check variety. The average yield of 'Yunheuk' was 99.9 kg per 10a at the national-wide regional performance.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.2
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• pp.552-561
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• 2019

The purpose of this study was to verify a model for the structural relationships of safety education provided by a marine leisure sports experience center to first-aid coping skills and experience satisfaction. 307 male and female customers who used a marine leisure sports experience center located in the city of S-si, K-do Province, were investigated from June 15 to August 30, 2017. The collected data were statistically analyzed by SPSS/PC+ 20.0 and Amos 16.0. The findings of the study were as follows: First, the safety education offered by the marine leisure sports experience center was found to have affected first-aid coping skills(t=3.425, p<.001). Second, the safety education by the marine leisure sports experience center was found to have exerted an influence on experience satisfaction(t=3.751, p<.001). Third, the first-aid coping skills of the marine leisure sports experience center was found to have had an impact on experience satisfaction(t=6.781, p<.001). The measurement model for the hypothesis test in this study was found to be appropriate(GFI=.978, NFI=993, CFI=984). Given the findings of the study, more extended safety education is expected to be effective, as customers who use marine leisure sports experience centers will be able to enjoy marine leisure sports more safely and improve their quality of life when they are compulsorily required to receive safety education.