• Korean Chemical Engineering Research
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• v.61 no.4
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• pp.604-610
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• 2023

The nitrogen reduction reaction (NRR), which produces NH₃ by reducing N₂ under ambient conditions, is attracting attention as a promising technology that can reduce energy consumption in industrial processes. We investigated the adsorption behaviors at various active sites on the Ni (100) surface, which is widely used among catalytic metal surfaces capable of adsorbing and activating N₂, based on density-functional theory calculations. We also investigated two N₂ adsorption structures, so-called end-on and side-on structures. We find that for the end-on case, N₂ is adsorbed on a top site, and the reaction proceeded in a distal pathway, while for the side-on case, N₂ is adsorbed on a bridge site, and the reaction proceeded with enzymatic pathway. Finally, this study provides insight into the adsorption of metal catalyst surfaces for the NRR reactions based on the calculated Gibbs free energy profiles of the thermodynamically most favorable pathways.

• Korean Journal of Food Science and Technology
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• v.50 no.4
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• pp.371-376
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• 2018

Consumption of wild edible greens (WEG) has risen in Korea recently, and processing of WEG at greenhouses is increasing. In this study, we investigated chamchwi (Aster scaber Thunb), a major WEG, to assess the effect of growth conditions on nutritional quality and blanching process. Field-grown chamchwi had 1.5-2-fold more total phenolic compounds and anti-oxidative capacity than the house-grown one. Among functional compounds, quercetin was significantly higher (about 5-fold) in the field samples (approximately $430{\mu}g/g$ fresh weight) than in the house samples. Soluble sugars in field-grown chamchwi were 2-fold higher than in the house samples. For both the samples, blanching process decreased chamchwi quality significantly, but the degree of loss for each component was different. Consequently, field-grown chamchwi exhibited superior nutritional quality than greenhouse-grown one, and blanching process resulted in a similar decrease of nutritional quality in both the samples.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.3
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• pp.241-247
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• 2010

The Effects of operating parameters such as initial pH, gaseous ozone concentration, supplied gas flow rate on dissolved ozone concentration and phenol degradation in ozone contact reactor were investigated. Dissolved ozone concentrations were saturated to constant values after a certain ozone contact time. The saturation values were influenced by experimental parameters. Dissolved ozone concentration decreased with the increase of initial pH because the ozone is unstable in high pH regions. The gaseous ozone concentration in a constant gas supply affected the saturation concentration of dissolved ozone and the injection rate of gas with a constant ozone concentration determined the rate to reach dissolved ozone saturation. Effects of operating parameters on phenol degradation were closely related with those of parameters on dissolved ozone concentration. Phenol degradation was enhanced by the increase of initial pH, because the degradation of dissolved ozone gave birth to free radicals which have much higher reactivity with phenol. Increase of gaseous ozone concentration and gas flow rate promoted the phenol degradation through the generation of dissolved ozone which plays the role in phenol degradation. The injection of methanol deteriorated the phenol degradation through the scavenging effect on OH radicals.

• The Journal of the Korea Contents Association
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• v.17 no.1
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• pp.701-717
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• 2017

Criticism is related with recognition activity which is interpreting and evaluating the text based on the particular criteria. It reflects the awareness system of a particular time-period in that it is a work of social meanings beyond individual impressions. However, the standards of criticism have changed, like the awareness system has changed as economy, culture or technology has evolved. The emergence of SNS has influenced the field of popular culture. It improves the role and participation of the public in criticism. Moreover, it breaks the previous paradigm of production and consumption in cultural industry. These changes bring not only the positive ones, such as improvement of diversity and freedom of criticism, but also the negative one, confusion of values due to the absence of criteria. This study mainly concerned debates and discourses of SNS on , a new song of IU, and focused on changes of aesthetic evaluations of culture performer, producer and audience. Especially, the authors tried to find out how such new technology has changed the criticism, and how it has influenced on our aesthetic consciousness.

• Culinary science and hospitality research
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• v.23 no.2
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• pp.45-55
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• 2017

The fundamental objective of cultivating organic farm produces is to preserve the natural environment and protect eco system so as to maintain the environment where people can live. In the current social atmosphere, the value and attitude of the college students to the environment are significant as they will take the leading part in the future. College students in Busan participated in the survey for the study to prove the moderating effect of the confidence with organic farm produces by investigating the casual relationship among the purchase intention, the environmentally-friendly attitude, and the consumption value of college students. The questionnaires were distributed over the period from October $15^{th}$, 2016 to $30^{th}$.261 papers of the questionnaires were analyzed with SPSS (V 23.0) and AMOS (V 21.0) programs. The analysis on Confidence, Confirmatory Factors, Structural Equation Modeling was compared with Chi-square considering the degrees of freedom between the two models in order to investigate the moderating effect from the purchasing frequency. The result from the analysis confirms that there is a casual relationship between college students' values of organic farm products and the environmentally-friendly attitude. Consumer confidence has a moderating effect on the attitude and purchase intention. As it can be seen from the result of the analysis, it is necessary for municipal governments and the government to push ahead with the policies on organic farm products in the future as it is proved that there is a casual relationship among the attitude, purchase intention and the students' values of the organic farm products.

• Korean journal of communication and information
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• v.20
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• pp.141-176
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• 2003

This paper examined how Korean courts conceptualized and applied public interest defense of Penal Code to the libel cases raised by socially influential persons. For this, this paper analyzed a total of 58 libel cases in which 'public interest' was mentioned by Korean courts between 1981 and 2000. It was found that whereas truth or believed-to-be-true defense is emphasized In libel cases by politicians or public officials, public interest defense was emphasized in the cases by private figures. It was also found that Korean courts tended to think of matters related with 1) national security and social order, 2) prevention of asocial crime, 3) enlightening of public, and 4) protection of consumers' interest as public interest. Conclusively, 'public interest' is not simply applied as an independent legal defense, because Korean courts insistently concentrated on the truth of a story and did not even specifically define what is public interest. Constitution Court recently maintained that the slope of legal defense should be broadened when a story is about public matters. However, Korean courts will not be likely to accept public interest defense as an independent one for the time being.

• The Journal of the Korea Contents Association
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• v.20 no.2
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• pp.36-50
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• 2020

YouTube as a news channel is gaining popularity because it offers more interesting and in-depth news than traditional news media. However, YouTube has been criticized for its distribution of false information (or fake news) in Korea. Politicians are actively proposing a variety of bills to regulate YouTube's false information and a lot of studies proposed how to regulate YouTube's false information. This study looked at the users' experience and perception of false information and identified factors that affected the regulation of YouTube news. The results showed that the conservatives and the moderate groups were exposed to false information more than the progressives, and those in their 60s believed that false information was distributed on YouTube rather those in their 20s to 50s. The more people value freedom of expression, the more people trust TV Chosun news, the more people tend to oppose the regulation of information on YouTube. On the other hand, it turns out that the more people trust the news on both terrestrial broadcasting networks and JTBC, and the more people value the enlightening aspects on the news, the more they approve of Youtube regulation.

• Journal of Radiation Protection and Research
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• v.29 no.4
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• pp.213-219
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• 2004

Soybean plants were exposed to HTO vapor in an exposure box for 1 hour at different growth stages. Relative concentrations of TFWT at the end of exposure (percent ratios of TFWT concentrations to mean HTO concentrations in air moisture in the box during exposure) decreased on the whole in the order of leaf > shell > seed > stem with the highest values of 40.2% and 6.4% for leaf and stem, respectively. TFWT concentrations reduced by factors of several thousands to several hundred-thousands from the end of exposure till the harvest. The reduction factor decreased in the order of leaf > shell > seed > stem. Relative OBT concentrations at harvest (ratios of the OBT concentration in the dry plant part at harvest to the initial leaf TFWT concentration, ml $g^{-1}$) were in the range of $2.2{\times}10^{-5}{\sim}9.5{\times}10^{-3}$ for seeds being the highest when the exposure was performed at the actively seed-developing stage. The exposure time-dependent variation in the OBT concentration was much greater in seeds and shells than in leaves and stems. It was indicated that OBT would contribute to almost all the radiation dose due to the consumption of soybean seeds in most cases after an acute exposure of growing plants to HTO vapor. Present results are applicable to establishing and validating soybean $^3H$ models for an acute accidental release of HTO.

• International Commerce and Information Review
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• v.15 no.4
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• pp.125-145
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• 2013

The Korea-EU FTA will provide korea with a significant advantage in the region both international trade and consumer welfare. Under the Korea-EU FTA, increasing of bilateral trade in consumer and industrial products would become duty and most remaining tariffs would be eliminated. This article studies on EU product price level of Korean consumer for before and after Korea-EU FTA effectuation. The questionnaires are sended 1,000 samples and 780 returns, 283 of them are analyzed for a this study. This paper has there main a parts, A Paired Samples Test result shows that the EU goods price level are positively affected by Flesh-meat, Electronic device & Electric home appliances, Kitchen utensils, Fruit juice(beverage), alcoholic liquors(wine, whisky), Clothes & Fashion. However, The Clothes & Fashion does not affect in EU goods price level, the Clothes & Fashion positively affected price differential more FTA effectuation before than FTA effectuation after.

• Journal of the Economic Geographical Society of Korea
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• v.1 no.1
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• pp.57-74
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• 1998

Recently. the interest in Physical distribution has increased in economic geography This paper aims to review and prospect the internatonal physical distribution studies of international trade and international freight flows. And it has examined the changes in methodology of international physical distribution. Author has defined international physical distribution as the physical distribution of international trade and international freight flow The results are as follows : (1) As the methodology of international physical distribution studies developes, the physical distribution should be recognized not only as transportation phenomenon but also as total logistics which is understood as the combination of production and consumption including information flow. (2) The studies about model of international physical distribution flow ill need to study regional relations including urban, in the future. And economic geography and location theory adding culture and behaviour elements will be restructured, because not only state but also multinational corporation appear as trade subject in global economy. (3) The studies for the relation of habor and its hinterland in Physical distribution need to analyze the factors causing habor use with decision-making behaviour of corporation. (4) After oil crisis. as air freight is important, the studies for hinterland and foreland of freight centering international airport are needed because of necessity of light and small freight. flexible Production system, free trade, and high speed freight transportation of freshing food and flowers and so forth.