• Journal of Radiation Industry
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• v.9 no.4
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• pp.217-221
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• 2015

When reactor coolant leaks occur due to cracks of a steam generator's tube, radioactive materials contained in the primary cooling water in nuclear power plant are forced out toward the secondary systems. At this time the secondary water purification resin in the ion exchange resin tower of the steam generator blowdown system is contaminated by the radioactivity of the leaked radioactive materials, so we pack this in special containers and store temporarily because we could not dispose it by ourselves. If steam generator tube leakage occurs, it produces contaminated spent resins annually about 5,000~7,000 liters. This may increase the amount of nuclear waste productions, a disposal working cost and a unit price of generating electricity in the plant. For this reasons, it is required to develop a decontamination process technique for reducing the radioactive level of these resins enough to handle by the self-disposal method. In this research, First, Investigated the structure and properties of the ion exchange resin used in a steam generator blowdown system. Second, Checked for a occurrence status of contaminated spent resin and a disposal technology. Third, identified the chemical characteristics of the waste radionuclides of the spent resin, and examined ionic bonding and separation mechanism of radioactive nuclear species and a spent resin. Finally, we carried out the decontamination experiment using chemicals, ultrasound, microbubbles, supercritical carbon dioxide to process these spent resin. In the case of the spent resin decontamination method using chemicals, the higher the concentration of the drug decontamination efficiency was higher. In the ultrasound method, foreign matter of the spent resin was removed and was found that the level of radioactivity is below of the MDA. In the microbubbles method, we found that the concentration of the radioactivity decreased after the experiment, so it can be used to the decontamination process of the spent resin. In supercritical carbon dioxide method, we found that it also had a high decontamination efficiency. According to the results of these experiments, almost all decontamination method had a high efficiency, but considering the amounts of the secondary waste productions and work environment of the nuclear power plant, we judged the ultrasound and supercritical carbon dioxide method are suitable for application to the plant and we established the plant applicable decontamination process system on the basis of these two methods.

• (The)Study of the Eastern Classic
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• no.54
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• pp.155-182
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• 2014

This study aimed to find the possibility of interactions between the Doctrine of the Mean and evolutionary biology. Between the two disciplines, there exists a huge gap such as "traditional era vs. modern times" and "humanities vs. natural science." However, this paper assumed that an analysis of their similarities and differences would allow us to find the possibility for them to interact and communicate with each other. For this purpose, the author proposed a three-step approach to studies of the following topics: human nature in step 1, validity of reasons to live in step 2 and biologically affinitive relations in step 3. The present study in step 1 pays attention to the similarities and differences between genes and in-ui-ye-ji (a set of four Confucian values: benevolence, righteousness, propriety and wisdom). This step discusses the issues of ri (principle) and ki (generative force) in Zhu Xi's theory vs. genes and vehicles in evolutionary biology, innate goodness vs. altruism of genes and in-ui-ye-ji vs. epigenetic rules. In step 2, attention is paid to the similarities and differences between natural selection and shi zhong (時中). They are discussed in terms of the upset of the law of nature vs. mutation, changes vs. evolutions and shi zhong vs. natural selection/adaptation. Step 3 focuses on the similarities and differences between species diversity and li-yi-fen-shu (one li and its many aspects). The discussion in this step addresses the issues of part or whole vs. li-yi-fen-shu, biological affinity vs. single energy and ecosystem vs. "the earth moves orderly, and everything thereon flourishes." If these studies are conducted as planned, a new direction can be set for Zhu Xi's neo-Confucianism. Further, the interaction between humanities and natural science will pave the way for us to overcome asymmetry between different disciplines.

• Bulletin of the Korean Chemical Society
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• v.14 no.6
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• pp.687-691
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• 1993

Complexation of $Cd^{2+},\;Pb^{2+}\;and\;Hg^{2+}$ ions with four cryptands were studied by potentiometry and solution calorimetry in various weight percent methanol-aqueous solvent at 25${\circ}$C under $CO_2$free nitrogen atmosphere. The stabilities of the complexes were dependent on the cavity size of macrocycles. The $Hg^{2+}$ ion stability constants are higher than those of $Cd^{2+}\;and\;Pb^{2+}$ ion. All the cryptands formed complexes having 1 : 1 (metal to ligand) mole-ratio except for $Hg^{2+}-L_1$ (cryptand 1,2b: 3,5-benzo-9,14,17-trioxa-1,7-diazabicyclo-(8,5,5) heptadecane) and $Cd^{2+}-L_2$ (cryptand 2,2b: 3,5-benzo-10,13,18,21-tetraoxa-1,7-diazabicyclo (8,5,5) eicosane) complexes. $Hg^{2+}-L_1$ complex was a sandwitch type, and the $Cd^{2+}-L_2$ complex showed two stepwise reactions. Thermodynamic parameters of the $Cd^{2+}-L_2$ complex were $6.08(log\;K_1)$, -7.28 Kcal/mol $({\Delta}H_1)$, and $4.78\;(log\;K_2)$, -4.62 Kcal/mol $({\Delta}H_2)$, respectively, for 1 : 1 and 2: 1 mole-ratio. The sequences of the selectivity were increased in the order of $Hg^{2+}\;>Pb^{2+}\;>Cd^{2+}$ ion for $L_3\;and\;L_4$ macrocycles, and the $L_2$-macrocycle has a selectivity for $Cd^{2+}$ ion relative to $Zn^{2+},\;Ni^{2+},\;Pb^{2+}\;and\;Hg^{2+}$ ions. Thus, it is expected that the $L_2$ can be used as carrier for seperation of the post transition metals by macrocycles-mediated liquid membrane because $L_2$ is not soluble in water, and the difference of stability constants of the metal complexes with $L_2$ are large as compared with the other transition metal complexes. The $^1H\;and\;^{13}C-NMR studies indicated that the nitrogen atoms of cryptands have greater affinity to the post transition metal ions than the oxygen atoms, and that the planarities of the macrocycles were lost by complexation with the metal ions because of the perturbation of ring current of benzene molecule attached to macrocycles and counter-anions.

• 사회경제평론
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• v.29 no.1
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• pp.31-70
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• 2016

This study provides a comprehensive survey of Post Keynesian economics. The global financial crisis 2008-2009 has triggered an important debate concerning economic theory, policy and methodology. The most important thing that this economic crisis has done for economics is that it revealed mainstream economics was wrong. Mainstream economics has been unable to offer clear answers for the crisis. The economic crisis, at the same time, brought about a crisis in the field of economics. This study suggests that economics needs to be altered into a new form that can explain the real world economy. In this paper, it is argued that Post Keynesian economics can be understood as the alternative economics. The paper begins with the vision and the origins of several Post Keynesian ideas, leading to an examination of certain features of the various groups, including their methodology and their approaches to uncertainty, their pricing theories and their growth theories. The focus, however, is on the stage reflected in Post Keynesian economics which is concerned with the conception of Lakatos's 'Scientific Research Programmes'. It is recognized that more research is necessary in order to complete the post keynesian economics as a standard science or as a progressive Scientific Research Programmes in economics.

• Journal of the Korea Society of Computer and Information
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• v.24 no.11
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• pp.245-254
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• 2019

In this paper, We analyze the effect of professionality of franchise education program on the satisfaction, work efficiency and business performance, to find how to develop education program which is considered as important in franchise management and to propose ways of sustainable operation of franchise education program. In this study, we carried out survey for 224 users who have competed franchise education programs. We divided the professionality of franchise education program into education instructors, education contents, education environment and education methods through precedent study. For the verification of study hypothesis, we used single regression and multiple regression analysis to verify the relationship between variables. The core study results are as follows. First, professionality of franchise education program is positively related to the satisfaction. Second, professionality of franchise education is positively related to work efficiency. Third, satisfaction affects work efficiency. Fourth, satisfaction and work efficiency have positive effect on business performance. Based on these study results, we found that if education program suitable for the industry and subjects from instructors to education method is developed to improve the professionality of franchise program and continuous communication and improvement is made to increase satisfaction and work efficiency, the franchise education program will create good results.

• Journal of Korea Port Economic Association
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• v.22 no.3
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• pp.59-78
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• 2006

The purpose of this paper is to analyze the trend on scale efficiency of the Port of Gwangyang from 1994 to 2004 using CCR, BCC, and Malmquist index approaches. The main results are as follows. first, scale efficiency shows a 50% similar [5(94/95, 95/96, 97/98, 2001/2002, 2003/2004) out of 10] pattern to technical efficiency change. Second, total factor productivity increased at 48.57% rate of growth on average in 6 out of 10 periods except 96/97, 97/98, 99/2000, and 2000/2001. 2003/2004 period is the one period experiencing rapid total factor productivity changes, mainly due to technical progress. Third, the ranking order of accumulative indices is scale efficiency change, TFP change, efficiency change, technical change, and pure efficiency change. The main policy implication of this paper is that according to the CCR, BCC, and Malmquist results, the Port of Gwangyang should develop the plan for enhancing the 5 Malmquist indices with following the management way of benchmarking ports.

• Journal of Korean Society of Archives and Records Management
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• v.2 no.2
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• pp.107-135
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• 2002

This study concerns Sama Pangmok which is in the possession of Harvard-Yenching Library, Harvard University, USA. Sama Pangmok is the archive of Saengwon Chinsa Examination(the licentiate examination) which is the preliminary test for main civil service examination. And it is the list of the names of the applicants who passed this examination. This examination were conducted from the days of lauching of Chosun as a new nation to the days of Kabo Kyungjang(the 1894 reform). While this examination was conducted 230 times, not all but 186 of the resultant lists are available. Of these 186 lists, this library posses 47 titles. My study of the existing dissertation on the possession of titles by Harvard-Yenching Library, 7 titles where in possession of the same library in 1968 and 5 ones in 190. It is the main objective of this study to clarify the possession of this library and correct the past errors in indication of possession of titles by this library. For this purpose, I conducted a study on Saengwon Chinsa Examination and Sama Pangmok, which could be the historical background of this study. This was followed by research on the bibliographical aspect of Sama Pangmok and the research on the situation concerning this Library's possession of the same lists. Lastly, the analysis of the special feature of Sama Pangmok possessed by this Library was conducted. It is expected that the result of this research will be applied to the practical research of the history of civil service examinations and the old and rare books overseas in the future.

• Journal of Soil and Groundwater Environment
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• v.13 no.3
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• pp.8-14
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• 2008

The effects of surfactant types and the ratio of nonionic and anionic surfactants on the washing of diesel contaminated soil were investigated. In batch tests, the nonionic surfactant, which has HLB within 12-13, showed a high diesel removal efficiency and Tergitol 15-S-7 (T15S7) with 20 g/L concentration exhibited the highest removal efficiency of 79-88% among the tested nonionic surfactants. Anionic surfactants, in general, showed lower removal efficiency than nonionic surfactants. In case of mixed surfactant system, the removal efficiency increased with nonionic surfactant concentration. With mixed surfactants of T15S7 and SDS as 3 : 1 ratio, diesel removal was enhanced to 76% with 10 g/L of the mixed surfactants. These results could be used in the selection of proper surfactants for remediation of diesel contaminated soils.

• Korean Journal of Soil Science and Fertilizer
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• v.13 no.4
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• pp.107-113
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• 1981

In order to investigate effects of fertilization on the yield of chestnut trees and to compare the compound fertilizer (CF) and Boron contained compound fertilizers (BCF) for chestnut trees developed by Chosun Fertilizer Inc. with single fertilizers (SF) at different fertilizing levels, a field experiment was conducted during the 1979 and 1980 growing periods. The results were summarized as follows: 1. The growth of chestnut trees was markedly improved as increasing the amount of fertilizers regardless of the SF, CF or BCF. 2. The number of strobiles increased as increased amount of fertilizers, and the ratio of dropped strobiles decreased by more than 90 percent by the BCF application while that decreased by 12 to 47 percents by the SF or CF applications. It implies that the boron application be necessary for increasing strobiles and reducing the ratio of dropped strobiles. 3. The yield increments by the SF or CF applications at the standard level were 80 percent and that by the BCF application at the same level was 202 percent and the highest yield increment was recorded as high as 302 percent by the BCF application at the doubled level in 1979. The yield response in 1980 was similar to that in 1979; however, the yields were lower than in 1979 due to the abnormal weather conditions such as low temperature and low solar radiation during summer except BCF applicated treatments where the yields were outstandingly increased. 4. The BCF developed proved as a recommendable compound fertilizer for chestnut trees.

• Journal of the Korean Society of Earth Science Education
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• v.14 no.2
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• pp.95-111
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• 2021

This study introduces the new role of science museums. The practitioners from seven domestic science museums and four overseas ones participated in this study and responded the questionnaires. I identified what kind of science culture programs there are, if those programs were successful or not, and if unsuccessful, what kind of improvements can be made to be successful. The participating practitioners in science museums also developed an ideal and realistic community cooperation-based science culture programs and I explored the role of a new science museum for this purpose. In the case of current science culture programs, the most successful or not was the participation of visitors according to public relations, and the importance of public relations were mentioned as improvements. For a successful community cooperation-based science and culture program, active promotion, pre-operation team, dedicated personnel, open mind, and same purpose of other institutions, the will of both institutions, and economic support sponsors are important variables. In the case of the domestic science museums, the actual development and operation of the program showed that a successful community based program must have cooperation with other institutions in the same region, win-win connections, the dedicated human resources, and that each science museum's strengths were maximized. The science culture programs in the 21st century will enhance the innovative role of science museums making the use of local human and physical infrastructure, reflecting the needs of citizens, taking the initiative in the community, fostering cooperation-based professional human resources, and communicating smoothly with the government or local governments.