• Economic and Environmental Geology
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• v.53 no.6
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• pp.667-675
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• 2020

An Alum-sludge based adsorbent (ASBA) was synthesized by the hydrothermal treatment of alum sludge obtained from settling basin in water treatment plant. ASBA was applied to remove fluoride and arsenic in artificially-contaminated aqueous solutions and mine drainage. The mineralogical crystal structure, composition, and specific surface area of ASBA were identified. The result revealed that ASBA has irregular pores and a specific surface area of 87.25 ㎡ g-1 on its surface, which is advantageous for quick and facile adsorption. The main mineral components of the adsorbent were found to be quartz(SiO2), montmorillonite((Al,Mg)2Si4O10(OH)2·4H2O) and albite(NaAlSi3O8). The effects of pH, reaction time, initial concentration, and temperature on removal of fluoride and arsenic were examined. The results of the experiments showed that, the adsorbed amount of fluoride and arsenic gradually decreased with increasing pH. Based on the results of kinetic and isotherm experiments, the maximum adsorption capacity of fluoride and arsenic were 7.6 and 5.6 mg g-1, respectively. Developed models of fluoride and arsenic were suitable for the Langmuir and Freundlich models. Moreover, As for fluoride and arsenic, the increase rate of adsorption concentration decreased after 8 and 12 hr, respectively, after the start of the reaction. Also, the thermodynamic data showed that the amount of fluoride and arsenic adsorbed onto ASBA increased with increasing temperature from 25℃ to 35℃, indicating that the adsorption was endothermic and non-spontaneous reaction. As a result of regeneration experiments, ASBA can be regenerated by 1N of NaOH. In the actual mine drainage experiment, it was found that it has relatively high removal rates of 77% and 69%. The experimental results show ASBA is effective as an adsorbent for removal fluoride and arsenic from mine drainage, which has a small flow rate and acid/neutral pH environment.

• The Journal of Korean Philosophical History
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• no.25
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• pp.381-410
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• 2009

It is a very important book about painting theory, that "Xuanhehuapu"(宣和畵譜) was wrote by Emperor Huizhong(徽宗) in Song Dynasty. Fundamental discussions and studies in the relation of socio-economical base in Song Dynasty are still more needed. And accordingly, it is necessary to advent upgraded aesthetical articles. Li xue(理?) deeply influenced upon paintings and its theories in Song Dynasty. Similarly, Taoism(道家) and Zen Buddhism(?宗) also did. But some people who have not found "Xuanhehuapu" important meaning and rich and complicated aesthetic thought, gave low and even negative valuation to it. There is rich aesthetic in "Xuanhehuapu", which is not as simple and narrow as some people imagined. It was deeply influenced by the aesthetic thought of Confucianism(Lixue 理學), Taoism(Zhuangzi 莊子) and "Zhouyi"({周易}). I will be analytical in a few aspects "Xuanhehuapu" of aesthetics thought. 1. The calligraphy and painting is one flesh. 2. learn a good lesson from painting. 3. The handicrafts(Art, 藝) and Tao(道) unify. 4. It is a Art taxology. 5. It use a new art criticism methods.

• (The)Study of the Eastern Classic
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• no.41
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• pp.7-35
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• 2010

Jang Hyungang(張顯光, 1554~1570) was one of the very famous Neo-Confucianists of T'oegye School in the Chosun dynasty. Jang, nevertheless, refused to accept Toegye's theory and had developed his own theory called li-qi-gyeong-wi-seol(理氣經緯說). So the theory was very unique in the history of Korean Neo-Confucianism. He matained that Tao(道), meaning the universal process which all beings including the human must follow, is accomplished by the unity of li(理, principle) and qi(ch'i, 氣, material force). He compared li and qi to warp(經) and woof(緯). According to his explanation, Tao is fulfilled by combining li and qi, as a textile is woven the combination of warps and woofs. He could, for I know, succeed to emphasize the unity of li and qii through this theory. Lots of Scholars in the Chosun dynasty criticized Jang's theory of li and qi for regarding li and qi as one, and thought that the theory originated from Luo Ch'inshun(羅欽順, 1465~1547), a famous Neo-Confucianist of in Early Ming China. Luo Ch'inshun maintained li-qi metaphysical monism that li and qi is united entity. In this respect, it seems that Jang's theory is similar to Luo's. However, I think that there are very important differences between the two. It is true that the main characteristics of Jang's theory is the unified relations between li and qi in this world. In the system of his philosophy, nevertheless, the topological position of li and qi are different in grade each other. Jang insisted that li is a supreme being to be materialized and realized through the movement of qi'in the process of universal development. Qi is accordingly only a kind of matter which completes li. In this sense, Jang's theory can be regarded as li metaphysical monism that li is the only substance. It means that Jang Hyeongwang's theory is a great contrast to Luo Ch'inshun's li-qi metaphysical monism.

• The Journal of Korean Philosophical History
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• no.32
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• pp.79-112
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• 2011

Since Noron(老論) had organized in the period of Sookjong(肅宗), it constantly had led the political situation of Choson until Choson(朝鮮) perished as the grasping political power. Studies and thoughts development of Noron can be devided into four periods. First, the term of politics of faction of the period of Sookjong. Second, a period of Youngjo(英祖) and Joungjo(正祖). Third, a period of politics of power(勢道政治). Fourth, the latter term of 19century. We can look into an origin and development aspect in outline by dividing like this. The general character of Noron can be summarized by the respect of Song Si-yeol(宋時烈, 1607-1689), the theory of a party of a man of virtue(君子黨論) based on the theory of moral civilization of Choson(朝鮮中華論), the succession of Lee i(李珥; 1636-1684)'s neo-confucianism, rejecting all teaching that does not conform to neoconfucianism and protecting right studies, and oppression of Roman Catholic. The noticeable scholars of Noron were Kwon sang Ha(權尙夏; 1641~1721), Kim chang hyup(金昌協; 1651~1708), Lee jea(李縡; 1680~1746) etc. These scholars of Noron following Song Si-yeol had tried to raise "Learning of the Way"(正明道) by respecting Zushi and removing injustice(尊朱子攘夷狄), also believed people should embody moral values in their society and country. and possessed an will guiding to stabilize the country by rejecting uncivilization(尊王攘夷). Above all, they insisted, the King of Choson should rule with 'lighting heavenly reason'(明天理). Also they insisted the King and countrymen should together strive to recover civilization of moral humanity and destroy uncivilzation. But gradually they lost the motive and purpose of moral politics in the seventeenth century. Finally Noron Byeokpa(?派) take over the reins of government. It resulted in the bad effect of politics of autocrat(勢道政治) having their own way to use power of authority after death of Jungjo(正祖). The peculiar character of Noron politics can valued as the extreme aspect of 'according of politics and scholarship'(政學一致).

• (The)Study of the Eastern Classic
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• no.54
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• pp.349-386
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• 2014

Noju Oh Hui-sang(1763-1833) is one of the neo-Confucian scholars representing with Hong Chik-pil the Kiho-Nak School from the late 18th to the early 19th century. He did sincerely not only succeed theories of Kiho School originated from Yulgok, but also strengthened the main view of the Nak faction by clarifying the theoretical stance of it derived from Kim Chang-hyop. Not only he does suggest critical points of view against Ho faction in terms of Horak Controversy, but also criticizes heterodox account, which raised by an inner circle of Nak faction. In this vein, Oh established the neo-Confucian ways of realization of morality and ideal society by setting up his own points of view on mind and bright virtues that are followed by various issues of Horak Controversy. My paper will examine the values of Oh's account of Nature-Principle in the light of intellectual historical context by paying a special attention to his critical views of Ho faction. Oh's main idea is how to systematize practical foundation of realizing morality. Thus, he wants to theoretically explain both the practice of morality and the reality of pure moral mind in order to establish concrete practices of them in the real world. In doing so, he pays attention to mutual inclusive relationship between Principle and Matter(ki:氣). The mutual inclusive relationship between them can be exactly applied into the relationship between mind and Nature. So, the realityof moral principle explicitly implies the pure goodness of moral agency. Furthermore, his elucidation of logical relationship between mind and Nature and its values via the ontological understanding of them is to set up a system of cultivation, i.e., realizing practical foundation of pure moral mind. In conclusion, we can evaluate that Oh's account of Nature-Principle, at least, aims not only at establishment of moral agency and its reality in a theoretical dimension, but also at a guarantee of their realization in the world.

• Journal of the Korean earth science society
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• v.43 no.1
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• pp.60-76
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• 2022

This study presents a software full setup and the following test execution times in a Linux cluster for the United Kingdom Earth System Model (UKESM) and then compares the model results from control and experimental simulations of the UKESM relative to various observations. Despite its low resolution, the latest version of the UKESM can simulate tropospheric chemistry-aerosol processes and the stratospheric ozone chemistry using the United Kingdom Chemistry and Aerosol (UKCA) module. The UKESM with UKCA (UKESM-UKCA) can treat atmospheric chemistryaerosol-cloud-radiation interactions throughout the whole atmosphere. In addition to the control UKESM run with the default CMIP5 SO₂ emission dataset, an experimental run was conducted to evaluate the aerosol effects on meteorology by changing atmospheric SO₂ loading with the newest REAS data over East Asia. The simulation period of the two model runs was 28 years, from January 1, 1982 to December 31, 2009. Spatial distributions of monthly mean aerosol optical depth, 2-m temperature, and precipitation intensity from model simulations and observations over East Asia were compared. The spatial patterns of surface temperature and precipitation from the two model simulations were generally in reasonable agreement with the observations. The simulated ozone concentration and total column ozone also agreed reasonably with the ERA5 reanalyzed one. Comparisons of spatial patterns and linear trends led to the conclusion that the model simulation with the newest SO₂ emission dataset over East Asia showed better temporal changes in temperature and precipitation over the western Pacific and inland China. Our results are in line with previous finding that SO₂ emissions over East Asia are an important factor for the atmospheric environment and climate change. This study confirms that the UKESM can be installed and operated in a Linux cluster-computing environment. Thus, researchers in various fields would have better access to the UKESM, which can handle the carbon cycle and atmospheric environment on Earth with interactions between the atmosphere, ocean, sea ice, and land.

• Korean Journal of Heritage: History & Science
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• v.55 no.2
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• pp.146-165
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• 2022

The purpose of this study is to identify differences in the formative characteristics and system of Jobok by comparing the three relics Ui, Sang, and Daedae, which comprised Jeon-Sik's Jobok, with the data in the literature and five excavated Jobok relics, Sin Kyung-yu, Kwon-Woo, Hwasan-Gun, Milchang-Gun, and Lee Ik-jeong, from the 17th and 18th centuries. Jeon-Sik'sJobok was designated as a Gyeongbuk tangible cultural heritage, Sangju JeonSik Jobok and Crafts, in 2021. The three components of Jeon-Sik's Jobok are valuable as historical data since they are the oldest relics confirming colors. Regrettably, the edging fabric of the Ui made of red twill was mostly lost, with only traces remaining. Based on records, it was presumed that the edging fabric was black. It was confirmed that white decorative lines were yet to be used. In Jeon Sik's Sang, only the three front widths and one rear width remain, but the shape of the four rear widths can be inferred, and the creases were held only at the waist. Eighteenth-century Sang was connected at intervals at the end of the waist. Seventeenth-century Sang was connected with a slight overlapping of the rear Sang below the front Sang; therefore, it is assumed that Jeon Sik's Sang was also connected by overlapping the rear by more or less than 5cm below the front. After Hwasan-gun, the Sang was first made using black lines, then white lines were inserted, and, finally, it was pleated from the waist to the hem. The Daedae made the Yo and the Sin by folding the corners to form a 冂 shape with a single long band. The white Ju(紬) and the green yumunsa were used for the Daedae and the edges. This matches the color of the Daedae seen in the Jobok portraits of Milchang-gun, Lee Ik-jeong, and Jeong Hwi-ryang from the 18th century. In the 17th century, the Daedae made the Yo and the Sin by folding a long band like the Daedae of Jeon-Sik. After the 18th century, the Yo and the Sin were made separately and connected. To tie the Daedae to the waist, thin straps were attached at both ends. The relics of Jeon-Sik can be evaluated as reflecting the 17th-century Jobok system in terms of color and shape. Furthermore, it can be said that they are important historical data complementing the insufficient or inaccurate records of the Gukjoolyeui-seolye and Gyeongguk-daejeon.

• Journal of the Korean earth science society
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• v.43 no.1
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• pp.128-139
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• 2022

This study aimed to investigate the tectonic setting of the volcanic edifice at Mt. Baekdu by analyzing petrochemical characteristics of Holocene felsic volcanic rocks distributed in the Baekdusan stratovolcano edifice and summit of the Cheonji caldera rim, as well as Pleistocene mafic rocks of the Gaema lava plateau and Changbaishan shield volcano edifice. During the early eruption phases, mafic eruption materials, with composition ranging from alkali basalt to trachybasalt, or from subalkaline (tholeiitic) basalt to basaltic andesite formed the Gaema lava plateau and Changbaishan shield volcanic edifice, whereas the Baekdusan stratovolcano edifice and Holocene tephra deposits near the summit of the Cheonji caldera comprises trachytic and rhyolitic compositions. Analysis results revealed bimodal compositions with a lack of 54-62 SiO₂, between the felsic and mafic volcanic rocks. This suggested that magmatic processes occurred at the locations of extensional tectonic settings in the crust. Mafic volcanic rocks were plotted in the field of within-plate volcanic zones or between within-plate alkaline and tholeiite zones on the tectonic discrimination diagram, and it was in good agreement with the results of the TAS diagram. Felsic volcanic rocks were plotted in the field of within-plate granite tectonic settings on discrimination diagrams of granitic rocks. None of the results were plotted in the field of arc islands or continental margin arcs. The primitive mantle-normalized spider diagram did not show negative (-) anomalies of Nb and Ti, which are distinctive characteristics of subduction-related volcanic rocks, but exhibited similar patterns of ocean island basalt. Trace element compositions showed no evidence of, magmatic processes related to subduction zones, indicating that the magmatic processes forming the Baekdusan volcanic field occurred in an intraplate environment. The distribution of shallow earthquakes in this region supports the results. The volcanic rocks of the Baekdusan volcanic field are interpreted as the result of intraplate volcanism originating from the upwelling of mantle material during the Cenozoic era.

• Journal of the Korean Association of Geographic Information Studies
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• v.25 no.1
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• pp.133-149
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• 2022

Existing domestic studies on estimating rice yield were mainly implemented at the level of cities and counties in the entire nation using MODIS satellite images with low spatial resolution. Unlike previous studies, this study tried to estimate rice yield at the level of eup-myon-dong in Gimje-si, Jeollabuk-do using Sentinel-2 satellite images with medium spatial resolution, rainfall and soil data, and then to evaluate its accuracy. Five vegetation indices such as NDVI, LAI, EVI2, MCARI1 and MCARI2 derived from Sentinel-2 images of August 1, 2018 for Gimje-si, Jeollabuk-do, rainfall and paddy soil-type data were aggregated by the level of eup-myon-dong and then rice yield was estimated with gamma generalized linear model, an expanded variant of multi-variate regression analysis to solve the non-normality problem of dependent variable. In the rice yield model finally developed, EVI2, rainfall days in September, and saline soils ratio were used as significant independent variables. The coefficient of determination representing the model fit was 0.68 and the RMSE for showing the model accuracy was 62.29kg/10a. This model estimated the total rice production in Gimje-si in 2018 to be 96,914.6M/T, which was very close to 94,470.3M/T the actual amount specified in the Statistical Yearbook with an error of 0.46%. Also, the rice production per unit area of Gimje-si was amounted to 552kg/10a, which was almost consistent with 550kg/10a of the statistical data. This result is similar to that of the previous studies and it demonstrated that the rice yield can be estimated using Sentinel-2 satellite images at the level of cities and counties or smaller districts in Korea.

• Korean Journal of Culture and Social Issue
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• v.28 no.2
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• pp.187-217
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• 2022

The aim of this study is to examine the psychometric properties of the Korean version of the Post-traumatic Stress Disorder Checklist for DSM-5(PCL-5). For this purpose, online surveys were conducted for two times with a one year interval using the data from 1,077 Korean adults at time 1, and 563 Korean adults at time 2. First, from the result of the confirmatory factor analysis, comparing the model fit of the 1, 4, 6, and 7-factor model, the 4, 6, and 7-factor model showed a acceptable fit, and the best fit was seen in the order of the 7, 6, 4-factor model. Second, the internal consistency, omega coefficient, construct validity, average variance extracted, and test-retest reliability results were all satisfactory.. Third, a correlation analysis with the K-PC-PTSD-5 and the sub-factors of BSI-18 was conducted to check the validity of the Korean Version of PCL-5. As a result, a positive correlation was seen with both K-PC-PTSD-5 and BSI-18. Fourth, a hierarchical multiple regression was performed to examine whether the Korean Version of PCL-5 predicts future PTSD, depression, anxiety, and somatization. As a result, the Korean Version of PCL-5 measured at time 1 significantly predicted PTSD, depression, anxiety, and somatization symptoms at time 2. Fifth, by analyzing the ROC curve, the discriminant power of PCL-5 for screening PTSD symptom groups was confirmed, and the best cut-off score was suggested. As a result of the longitudinal validation of Korean version of PCL-5, it was found that this scale is a reliable and valid measure for Korean adults. By looking into the predictive validity of the scale, it was found that the Korean version of PCL-5 can predict not only PTSD symptoms but also PTSD-related symptoms such as depression, anxiety, and somatization. Also, this study differs from previous validation studies measuring PTSD symptoms in that it suggested a cut-off score to help differentiate PTSD symptom groups.