• The Journal of the Korea Contents Association
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• v.14 no.11
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• pp.759-771
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• 2014

This study examines the overall structure among family relationship, self-efficacy, self-esteem, and delinquency of adolescent in single-parent families using structural equation modeling to provide theoretical basis preventable juvenile delinquency. The data of 516 middle and high school students in the research into the promotion policies on children and adolescents' mental health(2012) by the National Youth Policy Institute analysed. The result of this study are: (1) family relationship affects self-efficacy, self-esteem, and delinquency of adolescent, (2) family relationship affects delinquency of adolescent by the mediation of self-esteem, (3) self-efficacy doesn't affect delinquency of adolescent. This study suggests the necessity of both intervention as well as the development implementation of practical methods for the prevention of delinquency of adolescent.

• The Journal of the Korea Contents Association
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• v.14 no.2
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• pp.270-282
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• 2014

This study examined the influence of case management implementation factors on mentally ill person's quality of life based on case managers and clients who are from Mental Health Total Care voucher agencies. Hierarchical Lineral Model was used to verify client factors, case manager factors, agency factors and service providing factors. For the first time in our nation, major findings were found that case manager's career and intervention range have influence on mentally ill persons's quality of life, and that there is no influence for the caseload below 20 cases per one person. The practical implication was suggested about usefulness of case manager's career, caseload and intervention range within local social community system.

• Korean Journal of Logic
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• v.22 no.1
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• pp.183-209
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• 2019

In this paper, I first examine Reiss'(2005) arguments for the causal instrumental variable. Second, I argue that the conditions for causal transitivity I consider meet what the causal instrumental variables and the interveners of the manipulation theory of causation are intended to hold. Reiss shows that two conditions for instrumental variables are not sufficient for causal significance of independent variables for dependent variables. Reiss articulates and reformulates the conditions for instrumental variables in terms of the conditions on causality, while naming his instrumental variables as causal instrumental variables. Reiss argues that the causal instrumental variables are similar to the interveners of the manipulation, or intervention theory of causation. He further argues that the causal instrumental variables do a better job the interveners do. I argue that the conditions for causal transitivity I consider meet the goal the conditions for the causal instrumental variables and the conditions for the interveners both are intended to achieve.

• Journal of Korea Port Economic Association
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• v.29 no.1
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• pp.67-76
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• 2013

It has been more than four years since the outbreak of global financial crisis. However, the world economy continues to be challenged with new crisis such as the European debt crisis and the fiscal cliff issue of the U.S. The global economic environment remains fragile and prone to further disappointment, although the balance of risks is now less skewed to the downside than it has been in recent years. It's no wonder that maritime business will be bearish since the global business affects the maritime business directly as well as indirectly. This paper, hence, aims to predict the Baltic Dry Index representing the shipping business using the ARIMA-type models and Hodrick-Prescott filtering technique. The monthly data cover the period January 2000 through January 2013. The out-of-sample forecasting performance is measured by three summary statistics: root mean squared percent error, mean absolute percent error and mean percent error. These forecasting performances are also compared with those of the random walk model. This study shows that the ARIMA models including Intervention-ARIMA have lower rmse than random walk model. This means that it's appropriate to forecast BDI using the ARIMA models. This paper predicts that the shipping market will be more bearish in 2013 than the year 2012. These pessimistic ex-ante forecasts are supported by the Hodrick-Prescott filtering technique.

• Korean Journal of Social Welfare
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• v.67 no.3
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• pp.57-82
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• 2015

This study examines the extent to which community cohesion moderates the effects of neighborhood disorder on community integration among persons with mental illnesses(MI) who are living in the community. Stress process model, social disorganization theory, and neighborhood disorder model were considered with regard to the moderating effect of community cohesion. 692 persons with MI who utilized Community Mental Health Enhancement Centers were surveyed and analyzed, employing moderated regression model. Major findings showed that neighborhood disorder increased social integration. Community cohesion moderated the relationships of neighborhood disorder to three dimensions of community integration: physical, social and psychological integration. Implications for community intervention beyond the individual and service-level interventions were addressed in order to accomplish community integration for persons with MI.

• Journal of the Ergonomics Society of Korea
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• v.18 no.1
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• pp.13-24
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• 1999

The objective of the study is to discriminate EEG(electroencephalogram) due to emotional changes. Emotion was evoked by the series of auditory stimuli which were selected from the natural sounds in the sound effect collection of compact disc. Seventeen university students participated and experienced positive or negative emotions by six auditory stimuli with intermission between stimuli. Temporal EEG ($T_3$, $T_4$, $T_5$, and $T_6$) was recorded at the same time and a subjective test was performed on the eleven point scales after the experiment. The maximum and minimum scores of the EEG among six stimuli EEG were analyzed for discrimination of emotion. The EEG signals were transformed into feature objects based on scalar intervention model coefficients. Auditory stimulus was considered as intervention variable. They were classified by Discriminant Analysis for each channel. The features showed results with the best classification accuracy of 91.2 % in $T_4$ for auditory stimuli. This study could be extended to establish an algorithm which quantifies and classifies emotions evoked by auditory stimulus using time-series models.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.26 no.4
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• pp.105-121
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• 2015

PDA model is new collection development method not only corresponding user's demand, but also expensing acquisition budget effectively. In the PDA model, when the trigger that indicates user's demand reaches up to treshold, e-book is automatically purchased without librarian's interrogation. This study examines concept, basic principles, and current condition of operation about PDA and finds a way that could applicate to Korean university library foreign E-book consortium. Current model of university library e-book acquisition pursuit reduction of budget and utility value, but the selected collection is not based on user's demand. Therefore, it could be considerable to apply PDA or evidence based purchase model to foreign e-book acquisition consortium.

• The Journal of the Korea Contents Association
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• v.17 no.2
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• pp.258-268
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• 2017

The purpose of this research was to examine the factors affecting motivation for change of injured workers. Data from 305 injured workers were anlayzed using hierarchical regression Factors associated with injured workers' motivation for change were: multiple psychological security, acceptability of injury, and independence at personal level, family support at family level, and perceptive severity of injury, job, and return to job.

• Journal of the Korea Computer Industry Society
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• v.4 no.12
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• pp.1033-1042
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• 2003

In this study, the economic population prediction by computer simulation has been studied by using statistical model. The forecast of future population based on that of the past is a very difficult problem as uncertain conditions are modeled in it. Even if a thought forecast is possible, world-wide cultures and the local culture emotion the cultures of the world and out country can not be predicted due to rapid change and the estimation of population is ‘nowadays more and more’ difficult to be made good guess. In the estimation of economic population, by using the census population from 1960 to 1990, and using ARIMA model developed by Box and Jenkins, the estimation has been done on the economic population until 2021 according to age as appeared table and appendix. This kind of forecast would have both good point and weak point of ARIMA model theory saying that prediction can be done only by the economic population.

• 사회경제평론
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• no.38
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• pp.163-198
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• 2012

This analysis suggests a post Keynesian macro-dynamic model that integrates a financial variable, firm's debt, into the post Keynesian model of growth and distribution. On the basis of it, this study analyzes the effects of government financial expenditure on capital accumulation empirically. It also studies empirically whether a regime shift has arisen since Asian financial crisis in 1997. This paper shows that government financial expenditure has exerted an positive effect on capital accumulation. This empirical result supports government intervention in financial market in recurrence of financial crises. This study also finds grounds for a change in accumulation regime since Asian financial crisis in 1997.