• Informatization Policy
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• v.22 no.3
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• pp.36-46
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• 2015

This study verified theoretical model to explain adolescents' addictive use of smartphone. I used the data of 679 middle and high school students among 2013 internet addiction survey of National Information Society Agency(NIA). This study utilized structural equation modeling analysis to compare a suggestive model and alternative model. According to the final model, higher the satisfaction of family relationship, the addictive use of smartphone and emotional problems of adolescents were reduced. And, higher the addictive use of smartphone, higher the emotional problems of adolescents. Also, family relationship affects emotional problems via addictive use of smartphone. While, in the alternative model, path from amount of smartphone use to addictive use of smartphone was not significant. Results of this study suggest that family relationship variable may play an antecedent factor of addictive use of smartphone and emotional problems of adolescents and control of smartphone use is important to keeping a mental health of adolescents.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.139-143
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• 2009

본 연구의 목적은 기후변화를 고려하여 한강유역의 미래 물부족 정도를 평가하는 것이다. 하지만 미래 기후변화의 영향을 평가한다는 것은 많은 불확실성을 포함하고 있기 때문에 그만큼 예측이 어려운 것이 사실이다. 따라서 본 연구에서는 미래에 예상되는 기후변화와 물수요 시나리오를 바탕으로 기후변화-물수요 시나리오를 구성하였고 각 시나리오에 대한 불확실성의 범위 내에서 미래 이수부문의 수자원평가를 실시하였다. 이를 위해 기후변화 시나리오는 RegCM3 기후모형의 A2 시나리오에 의해 모의된 90년(2001-2090년)의 기상자료의 50 Set을 이용하여 SLURP 강우-유출 모형으로 50 Set의 일유출량 계열을 작성하였다. 또한 물수요 시나리오는 수자원장기종합계획 보완(2006, 건설교통부)의 물수요 시나리오를 바탕으로 고수요, 기준수요, 저수요의 3개 시나리오를 구성하였다. 따라서, 기후변화-물수요 시나리오는 150개 case로서 구성되며 물 수지 기반의 수자원평 가계획모형(K-WEAP)에 의해 미래 기간에 대한 물 부족량을 검토하였다. 검토 결과 미래에 한강유역의 물 부족량은 장기적으로 증가하는 것으로 나타났다. 그리고 한강유역의 소유역별 물부족량을 검토한 결과 특정 소유역에서 물 부족이 가중되고 장기적으로 한강유역 전체로 물부족이 예상되는 소유역이 증가함을 확인할 수 있었다.

• Journal of Korean Library and Information Science Society
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• v.38 no.4
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• pp.45-65
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• 2007

The purpose of this study is to suggest the construct model of teaching competency in teacher librarian. For this purpose, this study compares and analysis the existing literature of which teaching competency of subject teacher and teacher librarian competency standard. The teaching competency model of teacher librarian was designed with the result of compares and analysis. The suggested model composed of 3 process: (1) instructional design, (2) Instruction Implementation, (3) Instruction evaluation. It is also suggested that construct of isolated instruction and cooperative instruction. This study can be helpful to development a in-service program of teacher librarian and curriculum of Teacher librarian education.

• The Journal of the Korea Contents Association
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• v.14 no.11
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• pp.318-327
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• 2014

Today, Competition in employment among the youth is more intensified and this phenomena lead to youth unemployment problems. This study was conducted to found the influence of youth employment effort on labor participation. We studied what variables could affect motivation of employment preparation especially among undergraduate and graduated students. We used 3rd~5th(2009~2011) 'Youth Panel Data' designed by Korean Employment Information Service. Data we adjusted were male(3,481) female(3,770). We applied the Generalized Estimating Equations to Panel logit model. We found that job education and training, career guidance, job shadowing program, getting new certification, sex, age and change of gross income affected employment preparation with controling education factors, socio-economic factors. This study found the effort of employment preparation was significant impact on labor participation and showed an influence on each variable empirically. We suggest that the youth-unemployment problem there is a need to approach fundamental aspects.

• Culinary science and hospitality research
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• v.20 no.3
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• pp.171-185
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• 2014

This research investigates the causal relationships between the selection attributes of coffee shops and customer value and revisit intention. To do this, the statistics programs SPSS 18.0 and AMOS 18.0 were used targeting 218 college students from three universities (K, D, Y) in the Busan area. Frequency analysis, explanatory factor analysis, confirmatory factor analysis, correlation analysis, and structure model analysis for hypothesis verification were conducted to analyze the data. Based on the results of exploratory factor analysis, five factors were drawn as quality of coffee, indoor environment, service, discount, and brand. Model fidelity and validity was confirmed by implementing the confirmatory factor analysis. In addition, results of structure model analysis confirmed partial relationships among the selection attributes of the college students regarding coffee shops, customer value, and revisit intention. Furthermore, a positive relationship between customer value and revisit intention was also confirmed. Thus, this research suggests that coffee shop managers should manage in a way that customers may acknowledge the value of the expenses they pay.

• Korean Journal of Social Welfare Studies
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• v.40 no.2
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• pp.313-335
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• 2009

The objective of this study was to examine the association between participation in volunteer activities and self-esteem among adolescents. This study used data from the wave3-5(2005-2007) of Korean Youth Panel Study(KYPS). This study analyzed data of 3,449 second grade middle school students cohort. Fixed effects model using Proc GLM procedure in SAS was adopted to examine association between participation in volunteer activities and self-esteem among study participants. The results show that life satisfaction, appearance stress, relationship with parents, relationship with siblings, grades, relationship with teachers, and relationship with friends were significantly associated with self-esteem. Volunteer activities participation was associated with increased level of self-esteem.

• Journal of the Korean Society for Library and Information Science
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• v.33 no.1
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• pp.67-86
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• 1999

It needs to be considered that citing is net a static process but a dynamic process which is to produce to reproduce and to distribute knowledge by the interaction between societies surrounding the citer. This study begins by briefly acknowledging that citation is a universal practice in terms of establishing citer's own basis of research on the basis of the relation to previous studies and persuadeing potential citer to cite his/her research product. This study, however, is a preliminary attempt to examine the premise that although citing is a unversal practice. but citer motivations can be influenced by various citation environmental contexts surrounding the citer. This study presented general citation motivations derived from previous studies: (1) substantial motivations - conceptional and methodological citations 2) persuasive motivations - positive, applied, and negative citations, (3) perfunctory motivations - perfunctory and bibliographic citations, and (4) social relation motivations - personal connections and knowledge familiarity citations. In addition, this study identified citation environment factors affecting these citation motivations: (1) citer and documentation factor, (2) social and cultural environment, (3) information environment, and (4) international knowledge system environment. Each citation environment factor presented should be interpreted not as a separate factor, but rather as a close interrelation among these environment factors, Finally, the model of the citation environment factors developed in this study was discussed in the aspects of the relationship between citation motivations and their citation environment factors. This study suggested that further research should be conducted in order to examine these relationships more empirically and citation should be considered as a social product reflecting the interaction between citer and various citation environments.

• Korean Journal of Social Welfare
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• v.60 no.3
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• pp.129-150
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• 2008

This study examined the factors affecting service utilization of elderly residential care among long term care services recipients during long term care insurance pilot project period in Korea. Help-seeking Behavior model developed by Andersen and Newman(1973) was used to analyze the factors affecting their utilization residential care service among 1,939 long term care services recipients. Frequency and Decision Tree Regression analysis on SPSS 13.0 used. Analyses show strong significant factor is service preference(predisposing factors), and then significant factors are enabling factors such as co-residence type, household income. According to this results, need factors such as cognition disorder, problem behavior, ADL and IADL disabilities are affecting utilization behavior of elderly residential care services. These findings provide implications and suggestions about how long term care service system would be settled in Korea. And these finding provide information about target-efficient long term care continuum system to policy makers and helping professionals.

• Journal of the Korean Data and Information Science Society
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• v.22 no.3
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• pp.381-387
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• 2011

This paper suggests a method for estimating components of variance in one-factor random model. Estimates of variance components are given by the method of moments. Sums of squares due to variance sources are obtained by projections. This paper also shows how to use eigenvalues for getting the coefficients of variance components in the expression of the expectations of the mean squares. The suggested method shows easier and faster than the method of Harley's synthesis.

• Journal of the Korean Data and Information Science Society
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• v.25 no.4
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• pp.799-805
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• 2014

This paper deals with a method for getting the Type III sums of squares on the basis of projections under the assumption of two-way fixed effects model. For unbalanced data in general total sum of squares is not equal to the sum of componentwise Type III sums of squares. There are some differencies between two quantities. The suggested method using projections can detect where the differences occur and how much they are different. The traditional ANOVA method could not explain clearly the differences. It also discusses how eigenvectors and eigenvalues of the projection matrices can be used to get the Type III sums of squares.