• The Journal of the Korea Contents Association
• /
• v.12 no.5
• /
• pp.525-540
• /
• 2012

The purpose of the present study is to examine the causal relationship and invest the difference among isolation, interaction, content satisfaction, achievement and persistence in cyber university education by employment status. For this study, 104 students at A cyber university in Korea completed surveys in the fall semester of 2011. The result of this study indicated that there was a meaningful effect of interaction on isolation. Secondly, there was a meaningful effect of interaction on content satisfaction. Thirdly there was a meaningful effect of interaction on achievement. Lastly there were meaningful effects of isolation and interaction on persistence. In addition, according to multi-group analysis, there were no significant differences of structural path coefficients between two groups. Based on these results, this study suggests instructional design methods and management strategies to improve the quality of learning in cyber universities.

• Journal of Korean Library and Information Science Society
• /
• v.48 no.1
• /
• pp.77-97
• /
• 2017

With reference management tool based on web, we could understand not only impact about non-author, such as hand-on worker, educator, who are out of academia, but also trace the subject fields of readers and their status. This study by analyzing mendeley, understand what kinds of subject fields and status of readers read library and information science field articles. As a result of analyzing the status and the major of the reader, readers were distributed in the fields of business administration, education and so on, and according to the reader's major, there was a significant difference (p = .000) between the subject area of relatively read a lot. By the way, as the result of relational analysis between citation rate and numbers of mendeley readership about medeley saved articles, correlation coefficient shows 0.585, however as the result of relational analysis limiting the groups, in case of author group who tends to read the articles for citing, correlation coefficient shows 0.619. On the other hand, non-author group shows 0.384.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.4
• /
• pp.1612-1619
• /
• 2013

This study is to investigate on the influence of mental health and job satisfaction on perceived job stress of financial companies. The subjects of research were total 132 working at the financial company in T and J city Gangwon Province from September 20 to October 15, 2012. The survey instrument used was 43-item scale for evaluating financial worker KOSS and 18-item scale for mental health, 12-item scale for job satisfaction. Data was analyzed by using SPSS Win17.0 program, ANOVA, t-test, pearson's correlation coefficient, Multiple regression analysis. In a comparison of factors of Job stress and mental health demonstrated positive correlation and showed significantly. Job satisfaction demonstrated negative correlation and showed significantly. Also, for the financial workers solve the Job stress and support positive significant in there's job satisfaction, it need to nursing intercession to supply more better service and financial environment.

• The Korean Journal of Applied Statistics
• /
• v.20 no.1
• /
• pp.195-204
• /
• 2007

In order to represent multiple regression data, an alternative graphical method, called as SSR Plot, is proposed by using geometrical description methods. This plot uses the relation that the sum of sqaures for regression (SSR) of two explanatory variables is known as the sum of the SSR of one variable and the increase in the SSR due to the addition of other variable to the model that already contains a variable. This half circle shaped SSR plot contains vectors corresponding explanatory variables. We might conclude that some explanatory variables corresponding to vectors which locate near the horisontal axis do affect the response variable. Also, for the regression model with two explanatory variables, a magnitude of the angle between two vectors can be identified for suppression.

• Journal of Technology Innovation
• /
• v.21 no.3
• /
• pp.121-140
• /
• 2013

The establishment of function and role in government-funded research institute becomes a vital issue as fierce international technology-competition and enhanced industrial convergence makes science and technology important and influential more and in socio-economic level. This paper defines independent and dependent variables to identify factors which influence on research performance. As the independent variables, research funds, research personnel and research support staff are chosen. Dependent variables which are selected as proxy variables of research performance are royalties, papers and patents. Values from regression analysis were drawn by time-series analysis and cross-section analysis. As a result, the significance of correlation coefficients is sequential, research personnel, research support staff and research funds respectively. This finding is expected to give implication of future direction on government-funded research institute development.

• The Journal of the Korea Contents Association
• /
• v.12 no.2
• /
• pp.461-471
• /
• 2012

The purpose of this paper is to visualize the housing market dynamics with ESDA (Exploratory Spatial Data Analysis) using MATLAB toolbox, in terms of the modeling housing market dynamics in the Busan Metropolitan City. The data are used the real housing price transaction records in Busan from the first quarter of 2006 to the second quarter of 2009. Hedonic house price model, which is not reflecting spatial autocorrelation, has been a powerful tool in understanding housing market dynamics in urban housing economics. This study considers spatial autocorrelation in order to improve the traditional hedonic model which is based on OLS(Ordinary Least Squares) method. The study is, also, investigated the comparison in terms of $R^2$, Sigma Square(${\sigma}^2$), Likelihood(LR) among spatial econometrics models such as SAR(Spatial Autoregressive Models), SEM(Spatial Errors Models), and SAC(General Spatial Models). The major finding of the study is that the SAR, SEM, SAC are far better than the traditional OLS model, considering the various indicators. In addition, the SEM and the SAC are superior to the SAR.

• Korean Journal of Food Science and Technology
• /
• v.26 no.4
• /
• pp.389-392
• /
• 1994

Changes in free amino acids and amino nitrogen of traditional kochujang were investigated during 180 days of fermentation. Tested kochujang included Sunchang kochujang prepared with glutinous rice, Boeun kochujang prepared with barley, and Sachun kochujang prepared with wheat. Amino acids remarkably increased during fermentation were methionine, glutamic acid, isoleucine, leucine and tyrosine. However, regardless of kinds of kochujang major free amino acids were serine, aspartic acid, glutamic acid and proline. Glutamic acid was noted as the most contributing to the savory taste of kochujang in relation to the increasing ratio and content among tree amino acids during fermentaion. The correlation coefficent between totals of free amino acids and the contents of amino nitrogen were relatively high (0.87

• Journal of Digital Convergence
• /
• v.15 no.7
• /
• pp.359-365
• /
• 2017

This study was conducted structural model analysis focusing on the factors influencing UHDTV service usage. The perceived quality, innovativeness, price sensitivity are adopted as independent variables and perceived usefulness, perceived easy use are adopted as intervening variables. Especially symbolism used it as a control variable. As a result of the analysis by PLS, the influence coefficient of perceived quality was significantly higher than other variables. However, the combined effect of symbolism and perceived quality has a negative effect on perceived usefulness, and the more the users consider the symbolism of UHDTV usage, the more negative the evaluation of UHD quality and usefulness. With the launch of the terrestrial UHDTV service in May 2017, the most important issue is the production and distribution of high-quality content that users want.

• Journal of Korea Port Economic Association
• /
• v.23 no.2
• /
• pp.25-40
• /
• 2007

The sea/air intermodal transport is a time-saving and cost-saving transport for cargo shipments. In reaction to a recent growth of high value-added products in China, the volume of sea/air intermodal transport in Korean airport has been increasing continuously. This paper treats the situation, the system, and the possibility of sea/air intermodal transport, which are emerging as an alternative to solve the logistics problem related to the increase of international air cargo demand in China. Also, several strategies are considered to develope Korea into intermodal transport hub including the value added logistics activity which will secure the demand of sea/air intermodal transport.

• The Journal of shipping and logistics
• /
• v.34 no.4
• /
• pp.545-563
• /
• 2018

This study analyzes the major factors affecting the freight rates of Very Large Crude-Oil Carriers (VLCC) using co-integration and vector error correction models (VECM). Particularly, we estimate the long-term equilibrium function that determines the VLCC freight rate by conducting difference conversion. In the VECM regression analysis, the error term converges toward long-term balance irrespective of whether the previous period's freight rate is bigger or smaller than the long-term equilibrium rate. Thus, even if the current rate is different from the long-term rate, it eventually converges to the long-term balance irrespective of a boom or recession. This study follows Ko and Ahn (2018), which analyzed the factors affecting the chemical carrier freight rate and was published in the Journal of Shipping and Logistics (Vol. 34, No. 2). It is expected that an academic comparison of the results of each study will be possible if further research is conducted on other vessel types, such as container ships and dry cargo vessels.