• Computers and Concrete
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• v.12 no.6
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• pp.785-802
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• 2013

Ready-mixed soil material, known as a kind of controlled low-strength material, is a new way of soil cement combination. It can be used as backfill materials. In this paper, artificial neural network and nonlinear regression approach were applied to predict the compressive strength of ready-mixed soil material containing Portland cement, slag, sand, and soil in mixture. The data used for analyzing were obtained from our testing program. In the experiment, we carried out a mix design with three proportions of sand to soil (e.g., 6:4, 5:5, and 4:6). In addition, blast furnace slag partially replaced cement to improve workability, whereas the water-to-binder ratio was fixed. Testing was conducted on samples to estimate its engineering properties as per ASTM such as flowability, strength, and pulse velocity. Based on testing data, the empirical pulse velocity-strength correlation was established by regression method. Next, three topologies of neural network were developed to predict the strength, namely ANN-I, ANN-II, and ANN-III. The first two models are back-propagation feed-forward networks, and the other one is radial basis neural network. The results show that the compressive strength of ready-mixed soil material can be well-predicted from neural networks. Among all currently proposed neural network models, the ANN-I gives the best prediction because it is closest to the actual strength. Moreover, considering combination of pulse velocity and other factors, viz. curing time, and material contents in mixture, the proposed neural networks offer better evaluation than interpolated from pulse velocity only.

• The Journal of the Korea Contents Association
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• v.17 no.2
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• pp.288-297
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• 2017

Online education is a new domain of learning that combines distance learning with the practice of face-to-face instruction utilizing computer-mediated communication. As technology continues to develop and the needs of teachers require better access to higher learning, online graduate degree programs can be a valid alternative. Some institutions in the United States have already offered graduate degrees in music education through the online distance learning. In this study, 8 accredited online graduate degree programs in music education were identified in terms of curriculum requirement, program requirement, and admission requirement. Online programs offer considerable benefits of convenience, while their drawbacks relates to the quality of learning, feelings of weaker interpersonal interaction. More researches need in order for online music programmers to achieve higher standards of instruction and to inform other disciplines in the fields of arts education and the performing arts.

• The Journal of the Korea Contents Association
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• v.16 no.10
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• pp.627-635
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• 2016

The study analyzed what programs local broadcasting stations should produce to secure competitiveness in contents. As a result, in order to make more local people watch news programs, providing accurate local and general news and information and a forum for discussion on major issues is required. Moreover, it was revealed that providing a forum for discussion on local issues and representing the voice of local people based on accuracy, fairness and reliability is important to improve satisfaction with news. For increasing general program ratings of local broadcasts, it is required to provide interesting programs and encourage local people to participate in the programs. Additionally, in order to raise satisfaction with general programs, it is necessary to offer interesting and high quality programs, deal with local issues and information and provide local residents with a platform for participation.

• The Journal of the Korea Contents Association
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• v.20 no.7
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• pp.244-255
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• 2020

The purpose of this study is to closely examine a positive effect of grateful note-taking on grateful disposition and happiness in undergraduates and to inquire into a significance of experiencing the grateful note-taking. For the study, the pre·post tests were carried out in relation to grateful disposition and happiness targeting 131 undergraduates at K university where is located in G city. Also, for the qualitative research, data were collected through mind-class students' grateful notes, grateful-note reviews and in-depth questionnaires, and through the researcher's daily record of observation. As a result of the research, the grateful disposition and happiness showed a significant difference by group according to whether or not writing a grateful note. In other words, compared to the comparative group, the experimental group with the experience of grateful note-taking was indicated to be higher in grateful disposition and happiness. Meanwhile, a significance of experiencing the grateful note-taking appeared to be a positive thought, thankful habit, reflective time, and happiness discovery. These findings can be considered to offer an implication in terms of all variables that have an effect on grateful disposition and happiness in university students, and to show the necessity of expanding a grateful note-taking program.

• The Journal of the Korea Contents Association
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• v.9 no.11
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• pp.297-308
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• 2009

The purpose of this study is to explore the relationship between job stress and mental health of caretakers by SCL-90-R. This study are to offer basic information for patients the quality of service interventions. The sample for the study consisted of 247 caretakers who work in Busan. The results of this study are as follows: 1) Caretakers' mental health and job stress was not serious level. 2) There was an important factor in job stress, which was suitable pay. 3) Caretakers' job stress was positively related to mental health. There is a statistical correlation between the relationship with mental health and job stress. 4) Caretakers' mental health was affected by job stress level. Therefore, We need training and program that focuses on management job stress in caretakers.

• Journal of the Korean Institute of Rural Architecture
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• v.11 no.3
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• pp.1-9
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• 2009

Through 'Local Theme Science Museum' aid program that is one of emphasis promotion strategic project by 2007 'Science.Technology.Cultural Project Plan', raises status of scientific technique by national core ability because all people expand base that understand and support scientific technique, and forms a social atmosphere which is scientific technique is important which scientific technique can be spread widely on national life and society whole, and proceeds target that expand local science museum facilities by a base of local science culture spreading and popularization. Accordingly, to plan balanced regional development and utilize to an advanced base of local science culture spreading because offer a science culture experience opportunity to local inhabitants, 'Local theme science museum' project is doing for that establish more 100 science museums for national.public.private institution in whole country until 2012 year. Support 39 projects to 2008 from 1999 thereby, in January, 2009, 13 'Local theme science museum' is opened and operated. This study examined arrangement preferentially about 'Science.Technology.Cultural Project Plan' that is background of 'Local theme science museum' project. Since surveying science museum which is on opening and operation at the present and analyzed actual conditions and facilities and investigated specification necessity and direction of 'Local theme science museum'. Hereafter, to seek plan for propriety of project by characteristic and difference of 'Local theme science museum' is purpose of this study. Now, need set and promotion of following specification direction for right activation of proceeding 'Local theme science museum' by each area. First, differentiation of theme and justifiability of building, Second, propriety of site position, Third, maximization of synergy effect by mixing concept of 'Specialized Economic Zone for Regional Developmental Policy' and Ecomuseum's 'Theme center'.

• The Journal of the Korea Contents Association
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• v.16 no.9
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• pp.136-148
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• 2016

This study was carried out to analyze the consumption expenditure condition of elderly persons with and without physical disabilities by social economic status and sociodemographic characteristics and to compare the results of those two groups for making an offer the basic materials to provide political support for elderly persons with physical disabilities. The statistical analysis of collected data was enforced through T-test, ANOVA and Crosstabs with SPSS 19.0 program. The results of this study are summarized as follows. First, the group with disabilities has presumed to be in relative poverty given that disposable income, academic career and total living expenses showed lower than the other group. Second, the component ratios of domestic foods and housing expenses of disabled group showed higher but those of specific spending items of expenditure such as social activities, reserving fund of social security for economic safety net, clothing and eating out expenses showed lower than the other group.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.12
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• pp.2305-2309
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• 2016

Cloud Computing Service should support efficiency and stability. United States of America, for example, provides FedRAMP (Federal Risk and Authorization Management Program) accreditation to certify cloud computing service and hence growth of computing service industry is giving benefits of cost reduction and efficiency to companies. However, the use of computing service brings more risk than ever. Because cloud computing holds all the data of multiple companies, problems such as hacking bring out control loss of service and as a result total data of companies can be lost. Unfortunately, cloud computing certification programs do not have any good solutions for this data loss and companies may lose all the important data without any proper data backup. This paper studies such problems in terms of backup problem and provides Data Availability Zone solution for recovery and safe saving of data so that computing service can offer better efficiency and stability.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.319-322
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• 2018

Unplugged computing, the teaching and learning method, helps you learn the principles and concepts of computer science, and its advantage is that even elementary school students can easily understand it. Most of the North Korean Defector specialized alternative schools in the country have the purpose of having their students pass the qualification exam and be admitted to college. Therefore, the data, or information courses, are comprised of simple typing practices and basic office program handling. The purpose of the present study is to offer a teaching plan for these North Korean refugee adolescents, and we had assessed the courses in terms of its effectivity through a verification process. As a result, during the stage where we analyzed the answers from surveys, that they considered suggested curriculum for these specialized North Korean refugee alternative school was appropriate and have the potential to increase the student's satisfaction and interest.

• Journal of Practical Engineering Education
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• v.11 no.2
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• pp.305-311
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• 2019

Many universities offer mileage system as part of their student reward program. The mileage system provides mileage to students who participated in on-campus extracurricular programs, and awards scholarships regardless of grades based on the mileage earned. The purpose of this study is to identify the effect of students' perception of college mileage system on loyalty and to compare the difference in loyalty between those who received mileage and those who did not. To this end, the effect of loyalty was studied empirically by classifying the perception of college mileage into five categories: the cash value, aspirational value, diversity of benefits, convenience, and relevance. The results showed that aspirational value, diversity of benefits and relevance had a positive effect on loyalty, while cash value and convenience did not. In addition, the effect of cash value on loyalty was higher in those who received mileage than those who did not. In terms of relevance, higher loyalty was found in group that did not receive mileage than those who did.