• Journal of Korean Society on Water Environment
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• v.37 no.4
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• pp.263-274
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• 2021

This study presents the achievements and limitations of the voluntary-based Total Maximum Daily Load (TMDL) through statistical analysis of water quality monitoring data and performance assessments of TMDL plans implemented in the Gyeongan watershed. The results clearly showed that responsible local governments complied the allocated TMDL and the designated water quality goals were successfully achieved in the required period. This was possible because the Ministry of Environment provided innovative incentives, such as, relaxations of the existing tight land-use regulations and full-scale financial aids for constructing and operating public treatment facilities to draw local government voluntary participation. However, a couple of problems which decreased the effectiveness and efficiency of the voluntary TMDL were identified. The different TMDL implementation schedules between upstream (Yongin) and downstream (Gwangju) governments caused delay in water quality improvement and exaggerated TMDL allocation to the local development which made excessive investment in the treatment facilities. Although it is not directly related to the voluntary scheme, technical methods for establishing and assessing the water quality goals should be improved so that the effects of flow conditions on water quality are properly assessed. We expect that results of this case study contribute to developing a more effective voluntary-based scheme for the implementation of the so-called 'tributary TMDL' in the future.

• Journal of the Society of Disaster Information
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• v.16 no.4
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• pp.842-848
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• 2020

Purpose: It is important to operate safely and economically in obsolescent power plant facilities. Economical operation is related in the balance of the supply and demand. Safety operation predicts the possible risks in the facilities and then, takes measures to the facilities. For the monitoring of the power plant facilities, we needs several kinds of the sensing system. From the sensors data, we can predict the possible risk. Method: We installed the acoustic, vibration, electric and smoke sensors in the power plant facilities. Using the data, we developed 3 kinds of prediction models, such as, demand prediction, plant engine abnormal prediction model, and risk prediction model. Results: Accuracy of the demand prediction model is over 90%. The other models make a stable operation of the system. Conclusion: For the sustainable operation of the obsolescent power plant, we developed 3 kinds of AI prediction models. The model apply to JB company's power plant facilities.

• Journal of Wetlands Research
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• v.20 no.4
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• pp.383-389
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• 2018

Recently, it has been reported that water pollution due to non-point pollutants continues. Studies have been actively carried out to prevent such non-point pollutants from flowing into the water system and to prevent water pollution. In this study, to evaluate the adequate design of the LID facilities the rainfall corresponding to 80% of the cumulative rainfall of Yongin city was applied to an SA / CA graph obtained from the analysis of monitoring results of the vegetation type LID facility. As a result, the appropriate SA/CA ratio was 0.6% for stormwater sustain efficiency 80% and the appropriate SA/CA ratio was 0.5% for TSS removal efficiency 80%. The appropriate SA/CA ratio of the vegetation type LID proposed in this study can be used as a basis. for the future vegetation type LID design. If more data of vegetation type LID are added through continuous research, it will be more accurate.

• Journal of Mushroom
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• v.16 no.4
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• pp.334-337
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• 2018

Amanita virgineoides Bas is an ectomycorrhizal mushroom belonging to the family Amanitaceae in the order Agaricales. This fungus usually grows solely on damp soil in coniferous or deciduous forests from summer to autumn. Although Korean people consume A. virgineoides, some studies indicate that it can be poisonous. During our biodiversity survey of four specific regions i.e., Yongin, Eumseong, and Chungju from 2016 to 2018, A. virgineoides specimens were collected on the sixth rotation. We analyzed the temperature, precipitation, relative humidity, and vegetation surrounding the A. virgineoides fruiting bodies to reveal the environmental factors that influenced mushroom formation. It was found to usually grow in August, the hottest season in Korea. For 60 days before forming the fruiting body, temperatures were found to be between 20 and $30^{\circ}C$. More evidence is necessary to ensure that change in temperature is the major environmental factor that determines A. virgineoides fruiting.

• 한국노년학
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• v.32 no.4
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• pp.1181-1197
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• 2012

This study aims to validate the Attitudes to Aging Questionnaire(AAQ), which was recently developed in foreign countries, for Korean elderly. Using a sample of 320 older individuals living in Seoul, Gyeonggi, Chungcheong areas, statistical analyses including item analysis, exploratory factor analysis, convergent validity analysis were attempted to AAQ which composed of three factors with 24 items. In result, the three factor model of AAQ(including psychosocial loss, physical change, and psychological growth) were reconstructed in which new three factors(psychological loss, social loss, and change and growth in body and mind) were confirmed and three items were deleted. Reliability and convergent validity of AAQ-21 were confirmed. AAQ-21 would be useful to researchers and practitioners working with older adults for systematically assessing the attitudes to aging of older individuals and thus contribute to development of social policies and welfare programs for the elderly.

• Membrane and Water Treatment
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• v.10 no.1
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• pp.75-82
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• 2019

In a highly urbanized area, land availability is limited for the installation of space consuming stormwater systems for best management practices (BMPs), leading to the consideration of underground stormwater treatment devices connected to the stormwater pipe system. The configuration of a stormwater pipe network determines the hydrological and pollutant transport characteristics of the stormwater discharged through the pipe network, and thus should be an important design consideration for effective management of stormwater quantity and quality. This article presents a multi-objective optimization approach for designing a stormwater pipe network with on-line stormwater treatment devices to achieve an optimal trade-off between the total installation cost and the annual removal efficiency of total suspended solids (TSS). The Non-dominated Sorted Genetic Algorithm-II (NSGA-II) was adapted to solve the multi-objective optimization problem. The study site used to demonstrate the developed approach was a commercial area that has an existing pipe network with eight outfalls into an adjacent stream in Yongin City, South Korea. The stormwater management model (SWMM) was calibrated based on the data obtained from a subcatchment within the study area and was further used to simulate the flow rates and TSS discharge rates through a given pipe network for the entire study area. In the simulation, an underground stormwater treatment device was assumed to be installed at each outfall and sized proportional to the average flow rate at the outfall. The total installation cost for the pipes and underground devices was estimated based on empirical formulas using the flow rates and TSS discharge rates simulated by the SWMM. In the demonstration example, the installation cost could be reduced by up to 9% while the annual TSS removal efficiency could be increased by 4% compared to the original pipe network configuration. The annual TSS removal efficiency was relatively insensitive to the total installation cost in the Pareto-optimal solutions of the pipe network design. The results suggested that the installation cost of the pipes and stormwater treatment devices can be substantially reduced without significantly compromising the pollutant removal efficiency when the pipe network is optimally designed.

• Journal of the Korea Fashion and Costume Design Association
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• v.21 no.3
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• pp.137-147
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• 2019

The purpose of this study, I investigate the new trend, 'new-tro', through the music video costumes of young generations, and analyze the meaning and characteristics of 'new-tro'. The research method is, select 30 music video with new-tro fashion style on the music sites, and the fashion styles were analyzed in 11 music videos checked and selected by 100 students. As a definition of the term, 'retro' refers to a phenomenon in which the past reappears in modern time, and 'new-tro' is a new retro trend, a social phenomenon that enjoys the old with a modern sense, and is a compound word of 'new' and 'retro'. 'new-tro' is a modern reinterpretation and rebirth of the past style, and 'fu-tro' is a style of coexistence between the past and the future. In the music video, fashion is a media language and cultural code, and it creates trend or new fashion, that communicates with the public, stimulating emotions. As a result of the research, the common trend phenomenon expressed in the music video costume of 'new-tro' trend which appeared in 2000s is as follows. 1. New-tro style starts with items that were famous in the past. 2. It is one of postmodern marketing using color, print and logo. 3. It spreads quickly by the influence of culture that is characteristic of the Internet and SNS world. 4. It is bottom up propagation phenomenon of street fashion. 5. It is a time game where modern people connect the past with the present. 6. "new-tro" continues to evolve for that time, based on 'retro'. New-tro, an evolutionary version of the 21st century retro wave. and it is a key to marketing effectiveness as a sympathetic elements of 1020 generations with the reproduction of memories.

• Journal of the Korean Society of Food Culture
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• v.34 no.1
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• pp.53-60
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• 2019

This study investigated the sensory characteristics and antioxidative activity of the reduced salt dried bulgogi bibimbap containing AF-343, a dandelion-derived compound extract. A sample with a 30% reduced salt had a sodium amount of 659.01 mg, which was significantly lower than that of the sample before the reduction (p<0.05). The textural hardness of the SW (Standard sample with the AF-343), showed the lowest value of $1.03N/cm^2$, indicating that the AF-343-containing sample could have a slightly softer texture than the non-containing sample. In the analytical sensory test, the AF-343-containing samples showed a synergistic effect on the aroma and flavor of bulgogi, with values of 5.7 and 8.4, respectively, which were significantly higher than that of the non-containing sample group (4.3 and 4.4, respectively). The hardness by the sensory test was slightly hard with values of 7.2-8.1 in all samples, indicating that textural improvement was needed. In the acceptance test, all the samples scored with slightly lower values of 4-5 points, highlighting the need for future studies to improve the sensory characteristics of dried bibimbap. The flavonoid contents of AF-343-containing SW and RW sample groups were 68.21 and 64.31 mg GAE/100 g, respectively, which were significantly higher than those of the samples without AF-343 (49.06 and 44.82 mg GAE/100 g, respectively) (p<0.05). The ABTS and DPPH radical scavenging activities were similar to those of the flavonoid contents. As a result, in the production of AF-343-containing reduced-salt dried bulgogi bibimbap, more study on the textural improvement will be needed to achieve better palatability.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.232-235
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• 2019

In recent years, Japanese style Chinese Moe-tic Ship personification games have enjoyed success in Korean game market - starting from 'Girl's Frontier' in 2017 to recent 'Azur Lane' in 2018. Their 'all female' characters have overly sexual appearance thus young male adults/adolescents are main consumers of the genre. In this paper, we investigate all 300+ character skins of the game 'Azur Lane' on how much their character illustrates have sexual exposure of the female body for the sexism and how their standard attire have different patterns with respect to the affiliated nationalities. We report that the sexual exposure is highly related to the payable skins including swim suits and there exists some sexual stereotype in characters' attire. Japanese and Chinese characters emphasize their traditional Chipao and Kimono. Japanese also wore school uniforms. German characters wore uniforms the most and many British characters wore maiden uniform. Although this game is classified as adult game, its overly sexualized female characters are harmful for young adults to cause sexual objectification of females.

• Journal of the Society of Disaster Information
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• v.14 no.4
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• pp.474-479
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• 2018

Purpose: This study focus on the disaster response process in the disaster field manuals. The process reflects the several kinds of disaster situation scenarios under the defined disaster types. Method: Firstly we defined the situation concept from the emergency types. And then, we makes each disaster response process based on the situations. Results: There are several kinds of the disaster response process in a disaster fields manuals. The most of the process has the duplicated SOP's among the situation types. In this paper, we developed the situation code sand then apply the codes to the process. As a result of the work, we defined one the disaster response process which includes the situational code in the each SOP. Conclusion: This study developed the several kinds of the disaster response process based on the disaster situation types. It makes that we can easily respond to the disaster.