• The Journal of the Korea Contents Association
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• v.11 no.9
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• pp.372-383
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• 2011

Our study was carried out to develop the severity-adjustment model for length of stay in hospital for percutaneous coronary interventions so that we would analysis the factors on the variation in length of stay(LOS). The subjects were 1,011 percutaneous coronary interventions inpatients of the Korean National Hospital Discharge In-depth Injury Survey 2004-2006 data. The data were analyzed using t-test and ANOVA and the severity-adjustment model was developed using data mining technique. After yielding the standardized value of the difference between crude and expected length of stay, we analysed the variation of length of stay for percutaneous coronary interventions. There was variation of LOS in regional differences, size of sickbed and insurance type. The variation of length of stay controlling the case mix or severity of illness can be explained the factors of provider. This supply factors in LOS variations should be more studied for individual practice style or patient management practices and healthcare resources or environment. We expect that the severity-adjustment model using administrative databases should be more adapted in other diseases in practical.

• Journal of agricultural medicine and community health
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• v.43 no.3
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• pp.147-157
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• 2018

Objectives: The aim of this study is to measure health literacy levels and to identify health literacy related factors in vulnerable elders. Methods: The research design for this study was a descriptive survey design using convenience samples. Data collection was done by interviewing questionnaire with 200 elders from welfare centers in the cities. Data were analyzed by using percentage, Chi-square and multiple logistic regression with the IBM SPSS Statistics Ver. 24.0. Results: The results of this study are as follows: Vulnerable elders' sources of health information levels were very low, especially internet. In multiple logistic regression analysis, monthly income, sources of health information were significant accounted for OR 2.201, p<.05, OR 2.989, p< .01 health literacy. Conclusion: These results suggest that interventions for improving health literacy are necessary to enhance elders' finding of health information. Also, these results could be used in developing health literacy programs by internet.

• Journal of the Earthquake Engineering Society of Korea
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• v.7 no.3
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• pp.17-22
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• 2003

This paper presents an experimental investigation of a reversible colloidal seismic damper, which is statically loaded, The porous matrix is composed from silica gel (labyrinth or central-cavity architecture), coated by organo-silicones substances, in order to achieve a hydrophobic surface. Water is considered as associated lyophobic liquid. Reversible colloidal damper static test rig and the measuring technique of the static hysteresis are described. Influence of the pare and particle diameters, particle architecture and length of the grafted molecule upon the reversible colloidal damper hysteresis is investigated, for distinctive types and mixtures of porous matrices, Variation of the reversible colloidal damper dissipated energy and efficiency with temperature, pressure, is illustrated.

• Journal of Korean society of Dental Hygiene
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• v.7 no.1
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• pp.41-51
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• 2007

The purpose of this study was to provide information about the development of curricula geared toward improving the oral health of college students and of oral-health education programs in an effort to teach college students to be knowledgeable about oral health throughout their lives. The subjects in this study were 455 students at three different colleges in Gyeonggi province, on whom a survey was conducted. As for the basic oral health care of the college students investigated, 54.5 percent had ever visited a dental clinic over the last year, and 34.7 percent had their teeth scaled over the last year. Regarding self-awareness of current oral health state, 77 percent felt there s something wrong with their oral health. Concerning the correlation of their oral health behavior and knowledge to each selected variable, better internal and external locus of control led to better oral health promotion behaviors and better oral health knowledge. As to their self-perception of oral health and influential factors, better toothbrushing, better dietary habits and periodical oral examination, which belonged to oral health promotion behaviors, were followed by better oral health locus of control, and higher concern for oral health led to better oral health locus of control as well. Better toothbrushing, better dietary habits, periodical oral examination and better internal locus of control were concurrent with higher interest in oral health. Better external locus of control and stronger concern for oral health were accompanied by better oral health promotion behaviors.

• The Korean Journal of Applied Statistics
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• v.23 no.5
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• pp.967-975
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• 2010

Since the least squares estimation is not appropriate when multicollinearity exists among the regressors of the linear regression model, the principal components regression is used to deal with the multicollinearity problem. This article suggests a new procedure for the selection of suitable principal components. The procedure is based on the condition index instead of the eigenvalue. The principal components corresponding to the indices are removed from the model if any condition indices are larger than the upper limit of the cutoff value. On the other hand, the corresponding principal components are included if any condition indices are smaller than the lower limit. The forward inclusion method is employed to select proper principal components if any condition indices are between the upper limit and the lower limit. The limits are obtained from the linear model which is constructed on the basis of the conjoint analysis. The procedure is evaluated by Monte Carlo simulation in terms of the mean square error of estimator. The simulation results indicate that the proposed procedure is superior to the existing methods.

• Convergence Security Journal
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• v.14 no.3_2
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• pp.93-98
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• 2014

In a recent survey conducted among Seoul citizens, the demand for crime prevention in addition to settlement of environmental problem and traffic system improvement turned out to be the highest. In particular, the demand for prevention of crimes in residential areas was higher than any other items. The crime rates are especially high in deteriorated residential districts, which indicates the relation between crimes and physical environmental factors. In other words, proper measures for surroundings can prevent crimes. While there may be various ways to keep the residents from crimes safely, CPTED, a crime preventive method in a way of improving the physical surroundings is one of the most noteworthy solutions. The principles of CPTED involves the basic principles such as Natural Surveillance, access control, and securing of territoriality and additional principles of strengthening of Activity Support and Maintenance & Management. This study aims to present a method to lower and prevent crime occurrences by applying the principles of CPTED in deteriorated Apartment Housing in the middle of a city.

• The Journal of Small Business Innovation
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• v.19 no.4
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• pp.41-52
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• 2016

This paper examines the effect of unique underwriter lockup on the initial returns of an initial public offering (IPO) in the Korean Securities Dealers Automated Quotation (KOSDAQ). Underwriter lockup induces underwriters to underprice IPOs and stabilize aftermarket prices. The inducement is explored with respects to the mixtures of distributions of the initial returns consistent with underpricing and stabilization. Whether the inducement is meaningful when other factors are controlled is also explored. These explorations provide evidence that underwriter lockup leads to more positive average initial returns in the three aftermarket months.

• The Journal of the Korea Contents Association
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• v.10 no.5
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• pp.398-406
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• 2010

The purpose of this study was to research the relationships among self-leadership, job satisfaction, organizational commitment and customer orientation one of the performance variables of employees in travel agency. As more and more travel agency organizations move toward competitive environments, organizational members at all levels are being encouraged to take greater responsibility for their own job tasks and work behaviors. Self-leadership involves the influence people exert over themselves to achieve the self-motivation and self-direction needed to accomplish desirable outcomes. To accomplish this study, it was determined that the analysis derived from a hypothesis and literature reviews and data collected from 206 employees in travel agency.The results of empirical analysis showed as follows. First, Self-leadership has a significant effect on job satisfaction, organizational commitment and customer orientation. Second, Job satisfaction has a significant effect on organizational commitment and customer orientation. Third, Organizational commitment has a significant effect on customer orientation. Based on these findings, the implications and limitations of the study were presented including some directions for future studies.

• Journal of Korean Academy of Nursing
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• v.50 no.2
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• pp.210-227
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• 2020

Purpose: This study aimed to develop a scale to measure variables related to alcohol drinking prevention behavior in early elementary school, based on the theory of planned behavior. Methods: A scale was developed to measure variables related to alcohol drinking prevention behavior. Initial items for direct evaluation were constructed through a literature review, and those for belief-based indirect measure were generated through interviews with 30 second- and third-grade elementary school students. The collected data from 286 third-grade elementary school students were then subjected to item analysis, exploratory and confirmative factor analysis, criterion-related validity testing, and internal consistency assessment. Results: The final scale consisted of 35 items. Intention, attitudes, subjective norms, and perceived behavioral control explained 82.7% of the variance; behavioral beliefs, normative beliefs, and control beliefs explained 65.6% of the variance; and evaluation of outcome, motivation to comply, and power of control beliefs explained 72.8% of the variance. The confirmatory factor analysis indicated that the theoretical models had a satisfactory goodness of fit. Criterion-related validity was confirmed between the direct evaluation variables and the indirect measure variables (attitudes r=.64, p<.001; subjective norms r=.39, p<.001; perceived behavioral control r=.62, p<.001). Cronbach's α was .89 for the direct evaluation variables and .93 for the indirect measure variables. Conclusion: The scale developed in this study is valid and reliable. It could be used to measure and explain variables related to alcohol drinking prevention behavior in early elementary school.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.10
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• pp.6483-6494
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• 2015

This study was conducted to investigate the prevalence, severity or impact of symptoms in hemodialysis patients and its relationship with self efficacy and family support to identify factors influencing their symptoms. A cross-sectional design was used and the subjects were 243 patients undergoing hemodialysis at local units. The patients were Dialysis Symptom Index (DSI), a questionnaire about the presence and severity of symptoms. The data were analyzed by descriptive statistics, independent t-test, Pearson coefficient correlation and multiple regression. There were significant differences in the total score of symptoms according to age and duration of hemodialysis. Symptoms score had significant negative correlations with family support (r=-.35, p<.001) and self-efficacy (r=-.16, p=.006). Family support explained 16.0% of the variance in symptoms score. Hemodialysis patients experience many distressing symptoms, which have negative effects on quality of their life. Promoting family support can help to reduce and control distressing symptoms in hemodialysis patients.