• The KIPS Transactions:PartD
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• v.12D no.3 s.99
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• pp.461-470
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• 2005

This paper suggests a new policy for consolidating a company's profits by segregating the clients using the contents service and allocating the media server's resources distinctively by clusters using the cluster analysis method of CRM, which is mainly applied to marketing. In this case, CRM refers to the strategy of consolidating a company's profits by efficiently managing the clients, providing them with a more effective, personalized service, and managing the resources more effectively. For the realization of a new service policy, this paper analyzes the level of contribution $vis-\acute{a}-vis$ the clients' service pattern (total number of visits to the homepage, service type, service usage period, total payment, average service period, service charge per homepage visit) and profits through the cluster analysis of clients' data applying the K-Means Method. Clients were grouped into 4 clusters according to the contribution level in terms of profits. Likewise, the CRFA (Client Request Filtering algorithm) was suggested per cluster to allocate media server resources. CRFA issues approval within the resource limit of the cluster where the client belongs. In addition, to evaluate the efficiency of CRFA within the Client/Server environment the acceptance rate per class was determined, and an evaluation experiment on network traffic was conducted before and after applying CRFA. The results of the experiments showed that the application of CRFA led to the decrease in network expenses and growth of the acceptance rate of clients belonging to the cluster as well as the significant increase in the profits of the company.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.442-442
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• 2004

• 제어로봇시스템학회:학술대회논문집
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• 2002.10a
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• pp.119.4-119
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• 2002

$\textbullet$ Intoduction : Control architecture of PSR $\textbullet$ Layered functionality diagrams $\textbullet$ Class diagrams $\textbullet$ Petri-net based configuration diagram $\textbullet$ Experiments $\textbullet$ Conclusions

• Journal of KIISE:Information Networking
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• v.30 no.5
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• pp.641-648
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• 2003

In this paper, we propose a general analysis tool that derives guaranteed delay bounds for real-time sessions when those sessions pass through heterogeneous schedulers in general packet networks. This tool characterizes each different scheduler by a homogeneous service curve server. We show that service curve servers can characterize a strictly larger class of schedulers than LR servers. That is, we can characterize not only all LR servers but also RC-EDF and SC scheduler by service curve servers. Even with such advantage over LR servers, service curve servers provide accurate analysis results. We prove mathematically that if we analyze a network that can be analyzed by both LR servers and service curve servers,,both cases yield the same delay bound.

• Journal of the Korean Society of Earth Science Education
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• v.14 no.2
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• pp.193-201
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• 2021

This study is a study of factors affecting pre-service teachers' learning immersion in online science classes. The results of a survey on the responses of 88 pre-primary teachers to online science classes were interpreted. In online science class, independent variables were set as ease, usefulness, and social presence, and dependent variables were set as learning immersion. Online science classes were conducted based on the university's LMS system. The results of the study were interpreted by regression analysis for t-test, correlation between factors, and multicollinearity test in pre-post-responses of pre-service teachers for ease, usefulness, and social presence. The results of this study are as follows. First, there was a significant effect in the before-and-after tests of factors in the online science class. Second, the correlation coefficient between factors in online science class is .306 for sense of community and mutual support and concentration at the significance level of .01, and .354 for learning immersion and open communication, indicating that there is a correlation. Third, considering the effective results of the pre-post test of each factor in the online science class, it cannot be interpreted that a particular factor had an effect, but it is interpreted that learning was immersed in ease, usefulness, and a sense of social presence.

• Journal of Christian Education in Korea
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• v.72
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• pp.183-203
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• 2022

The purpose of this study is to construct factors of AI education utilization competency. AI education utilization competency is used as basic data for education to enhance the AI education competency of pre-service early childhood teachers. To this end, 7 studies related to competency factors and models were selected by searching for previous studies. Seven preceding studies were analyzed. As a result, 18 competency factors were extracted, including understanding of artificial intelligence. The extracted competency elements were divided into six areas, which are divided into understanding subject knowledge through coding, class preparation, class management, class result feedback, class guidance, and self-development. And 15 factors were constructed. The draft formed through coding was improved through review by three early childhood education experts. Factors improved through expert review were structured by classifying them into knowledge, skills, and attitudes to organize the curriculum. The validity of the structured competency factor was verified through expert Delphi. As a result of the Delphi verification, all factors were converged in the first survey. Through this, 6 competency areas, 11 competency factors, and 19 competency factors were composed of knowledge, 10 skills, and 5 attitudes. The implication is that the competency factors presented as a result of this study can be used as basic data for organizing a curriculum to improve the ability of pre-service early childhood teachers to use artificial intelligence education.

• The Journal of the Korea Contents Association
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• v.22 no.4
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• pp.365-378
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• 2022

This study attempted to understand the effect of subjective class consciousness on the quality of life of female elderly people and to verify the multi-mediated effect of expectation of living standards and depression. To this end, an analysis was conducted using the SPSS Process Macro for 8,070 female elderly people aged 55 or older in the data of the "2018 Aging Research Panel Survey 7" of the Korea Employment Information Service. As a result of the analysis, first, it was found that the higher the subjective class consciousness of the elderly women, the higher the quality of life. Second, the higher the subjective class consciousness of the elderly women, the higher the expectation of living standards and the lower the depression. Third, in the relationship between the subjective class consciousness and quality of life of female elderly, when expectations and depression of living standards were simultaneously put into the regression equation, both variables were found to have significant mediating effects. Based on these research results, practical and policy implications for improving the quality of life of the elderly women were discussed together.

• Journal of The Korean Association of Information Education
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• v.25 no.2
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• pp.355-365
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• 2021

Online teaching has become a daily routine in schools after 2020, and at the same time, the ability to design and conduct classes using smart devices and apps is becoming more important to teachers. Therefore, in this study, we tried to find out how the demonstration of classes using smart devices and apps online has an effect on the intentions of prospective teachers who want to use them in the future. To this end, classes were designed according to the design principles for improving smart education capabilities of pre-service teachers, and the classes were conducted for pre-service teachers. Afterwards, the variables included in the UTAUT model, such as Performance Expectancy, effort Expectancy, social influence, Voluntariness of Use, Behavioral Intention, and Facilitating Conditions, were measured before and after classes, respectively, and the effectiveness of the class was verified through t-test of response samples. As a result, it was confirmed that all variables except the Facilitating Conditions had a significant positive(+) effect. These results suggest that online class demonstration education can be a way for pre-service teachers to more practically adapt to the educational field where smart education is required.

• Korea Information Processing Society Review
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• v.11 no.4
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• pp.89-92
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• 2004

Business organizations today enjoy unprecedented connectivity over the Internet that directly affects their bottom line and their top line. Connectivity increases productivity and reduces cost of operations. It eliminates barriers resulting from distance and integrates the world. Nevertheless, businesses today face a challenging trade-off between securing their corporate assets and leveraging this ubiquitous connectivity to improve their operations. (omitted)

• Journal of the East Asian Society of Dietary Life
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• v.22 no.5
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• pp.576-584
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• 2012

The purpose of this study was to provide basic references in order to improve the quality of military foodservice by investigating the eating behavior, preferred items for improvement and foodservice satisfaction of male military personnel in Backrung do. A total of 213 male military personnel (66 sergeants, 44 corporals, 80 privates first class and 27 privates third class) responded to a survey questionnaire. Frequencies, t tests, analysis of variance, and Cronbach's alpha, were carried out by SPSS Win V.18.0. The results of the study were as follows. The satisfaction level of military foodservice was slightly below 3 out of 5 points, and Korean cuisine was the favorite food. Military male personnel preferred frying and stewing as their favorite cooking methods. Sixty-six percent of subjects answered that their favorite principal ingredients were meat and fish. Therefore, as young soldiers' taste preferences were westernized, proper nutrition education programs for good health are needed. Further, the current military dining environment should be changed into a quiet and neat atmosphere, with clean dishes, nutritious meal items, and quick and proper serving methods, etc. Based on the results above, military authorities should develop an adequate menu for the male military personnel at Backrung do military base that includes a variety of foods, and cooking methods.