• Journal of the Korean Society of Industry Convergence
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• v.20 no.4
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• pp.345-350
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• 2017

Saponin is the most pharmaceutical active ingredients of the ginseng plant, it was called "Ginsenoside" which means the Glycoside of ginseng that composed glycosides and aglycones. The human body will absorb the saponin easily if these substrate was decomposed by active microorganism. Fermentation is the most convenient technique to decompose this active ingredients. The purpose of this research was to study the sugar content, pH and acidity development during the ginseng fermentation process. Fresh Korean ginseng and red ginseng extract was used as the main ingredient. The concentrated of pure ginseng extract was added to increase the saponin extract. Furthermore, the mix microbial powder was added as starter to increase the fermentation efficiency. The ginseng was fermented in fermentation chamber at temperature $37^{\circ}C$ during 70 days. In the end of experiment the sugar content was decreased from 24% to 7.65%, The pH was decreased from 6.5 to 3.4, and the acidity level was incresed from 0% to 1.2%.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.3D
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• pp.223-229
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• 2012

Skid resistance is defined as the friction between pavement surfaces and vehicle tires. Lower skid resistances were observed as the vehicle speeds the water film thicknesses were increased according to the analysis results using computer modeling. The lift force is calculated from the analysis results and depends on vehicle speeds and the water film thickness. A modified IFI(international friction index) skid resistance prediction model was developed to reduce the differences between the IFI resistance prediction model and the actual skid resistance. The correlation analysis results between the IFI prediction model and the actual skid resistance revealed that the $R^2$ using the modified IFI prediction model was 0.64 whereas the $R^2$ using the conventional IFI prediction model was 0.49. This presents the modified prediction model is better than the conventional one. An improved precise prediction model is to be obtained if water film thicknesses are considered in the modified prediction model.

• Journal of Korea Multimedia Society
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• v.7 no.4
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• pp.484-495
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• 2004

In this paper appears that in this extremely attractive and growing services segment, academics, as well as practitioners, would benefit from investigating the relationships among the players' loyalty, word of mouth and flow, and the impacts of several other key game-related constructs on consumer behavioral intentions. A conceptual framework is proposed and a structural equation model is developed. This paper develops the exploratory LISREL model for identifying the factors affecting the players' loyalty for some specific brand of online games. The concept of flow, feedback, challenge, etc, are all introduced into the model, as the independent variables affecting the loyalty directly and indirectly. Statistical results show that depending upon the types of games, the configuration of structural equation model is a little different from each other, but overall results are very much intuitive in that challenge positively enforces flow, and flow strengthens loyalty. Other interesting results concerning game development strategy are also provided. It is hoped that this result might provide the useful guidelines for developing the successful online game contents. With a better understanding of the players' behavioral intentions, online game developers should be able to make adjustments in their development and marketing plans, providing them with a sustainable advantage over their competition.

• Journal of Korean Library and Information Science Society
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• v.48 no.4
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• pp.181-207
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• 2017

The purpose of this paper is to provide values and effectiveness to libraries making a new social network service marketing model and strategy. According to study, when libraries entice library users with social network services, the users become loyal customers who give libraries long-term supports. For method of study, it establishes 15 hypotheses and proves those hypotheses with 157 responders. After inspecting hypotheses, 13 hypotheses are adopted and 3 hypotheses are dismissed. During the research, it is verified that usefulness perceived by library users is the most important factor of user satisfaction and continuous use intention which increased library users' intention to continue visiting the library. In addition, effectivness of marketing and cause are found in order of system quality, information quality, reliability, interactivity, subjective norms. In other words, the study found that library users found their information for using social network services and this attribute affects user satisfaction and ultimately continuous use intention in a positive way.

• Journal of Navigation and Port Research
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• v.34 no.8
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• pp.659-667
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• 2010

In this study, we examine features of marine transport environment which shipping companies are facing, analyze the ability to cope with this environment, and present the relationship between the ability and business performances. Then, we demonstrate that diagnosis of shipping environment in the global marine transport environment and preparing to it is very important. Also, we present that the ability to prepare is the main factor to decide the competitive power of the company. This study has a meaning in that the importance of business activities related to environment such like diagnosis of environment, analyzing, management, adaptation, and prediction is presented. Besides, the value of this study is that we analyze the relationship between corresponding ability, strategic execution process and business performance in general.

• The Journal of the Korea Contents Association
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• v.15 no.1
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• pp.105-113
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• 2015

This paper investigated Korean popular entertainment (K-entertainment, hereafter) tourism using theory of intention-behavior. Dividing the sample of international visitors to Seoul into the groups of "inclined actors", "inclined abstainers", and "disinclined abstainers," we examined the factors affecting such a division. The results showed that between the inclined actors and the inclined abstainers, there was no significant difference in the years of exposure to K-entertainment contents or the frequency of going to K-entertainment performance in the past. In contrast, the inclined actors were found to have a greater level of knowledge, ability, and cooperation compared to the inclined abstainers. In addition, we found that the K-entertainment performance in Korea was perceived as a substitute, rather than a complement to the performance held elsewhere in the world. Our findings suggest that interests in K-entertainment alone are not sufficient to drive the international visitors' intention to the action of attending K-entertainment performance during their visit to Korea. To this end, this study implies that it is necessary to design attractive tourism packages that include K-entertainment performance.

• Journal of The Korean Association of Information Education
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• v.17 no.3
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• pp.329-337
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• 2013

Introductory programming course using robots that makes good effect to learners. I investigated that the effects on flow at using robots of introductory programming course. According to experiment result, the flow level showed significant change and all of it's element(antecedents, experiences, effects) had changed significantly. This result means that using robots of introductory programming course makes effect that is very positive in flow level of learners. There was strong interrelation by each element of flow in the result of correlation analysis about flow element. In particular, interrelation of antecedents element and experience element was high. Therefore, using robot is precondition of flow, and the level of experience element is high according to level of antecedents, and also experience element elevate the learner's intrinsic satisfaction. The conclusion is that using robots of introductory programming course is helpful enhancing learner's flow level and is positive in study achievements.

• KDI Journal of Economic Policy
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• v.29 no.3
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• pp.75-109
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• 2007

This paper empirically investigates the effects of import tariff on within-plant productivity growth in Korean manufacturing, using the detailed plant-level longitudinal data of the Korea Census of Manufacturers for the period of 1993-2003. Our main findings are as follows: First, the productivity changes of Korean manufacturing for the period under analysis were mostly induced by within-plant productivity gains, rather than within-industry and/or between-industry resource reallocations. Second, after controlling for firm-specific heterogeneity, the estimation results indicate that lowering tariff-barriers has a positive impact on within-plant TFP growth. We interpret the results in a way that trade liberalization through the removal of tariff and non-tariff barriers heightens the competitive pressure, which in turn creates incentives to reduce production and managerial inefficiency and to invest more on innovative activities. Third, we also find that plant productivity growth from reducing tariff barriers is particularly conspicuous within a year after tariff changes, which implies that plants are quickly adjusting to heightened import competition. On the other hand, our results show that the trade effect on employment creation proceeds relatively slow.

• Journal of the Economic Geographical Society of Korea
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• v.5 no.2
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• pp.249-275
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• 2002

Iksan Export Free Zone which was established for the export promotion, the employment augmentation, the technological improvement and the regional development promotion through the attraction of foreign direct investment is declining function with diminution of foreign direct investment, exportation and employment since the middle of the 1980s. The decline factor of the function was inherent in disregard of the necessary locational factors for Export Free zone's function promotion and without respect to conditions in a choice of location. And the present labor intensive industrial structure of region has some difficulties with a modification of Export Free Zone's industrial structure to a technology intensive industry. According to the lack of coherent policy, a limited plottage and a lack of the extensible space decrease the effect of agglomeration and economic of scale. And the lack of governmental policy to create a dynamic advantage comparative with an amelioration of the locational conditions of region diminish the regional attractive force to foreign direct investment.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.47 no.3
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• pp.143-146
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• 2002

This study was undertaken to learn what ratio of clipping top was the most optimum for minimizing of the decrease of root yield of over 50g in sweetpotato at early cultivation. The test variety was "Shinyulmi" which was transplanted for early cultivation on April 18. The ratios of cripping top were 5, 10, 15, 20, and 25 percents. The date of clipping top was June 20 when the shoots were transplanted for double cropping. The total length of vine, the number of branches per plant, the number of tuberous roots over 50g and average root weight over 50g were not affected by clipping top. The ratio of root yield over 50g was lower over 20 percents of clipping top. The fresh weights per plant of top and bottom were similar as compared control with 15 percents of clipping top. In conclusion, the optimum ratio of clipping top was 15 percents for maximizing of the production of the shoots in sweetpotato for double cropping. cropping.