• The Journal of the Korea Contents Association
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• v.12 no.7
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• pp.284-294
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• 2012

In the study, we estimate efficiencies using CCR model of DEA, Super efficiency(AP) model, and super-SBM model with the data of 32 regional public hospitals in Korea from 205 to 2009. With Wilcoxon-Mann-Whitney statistics, we analyze efficiency differences for environmental factors(regions, type of hospital, type of operations, type of education training, relative importance of madicaids) among regional public hospitals. The results can be summarized as follows. Firstly, technical inefficiencies of regional public hospitals range from 15% to 17% in CCR model, 13% to 15% in AP model, 7% to 12.6% in SuperSBM model. Second, we confirm that environmental factors of hospitals cause different inefficiencies among them. The implication of this study is that policy and institutional change may need to improve the efficiencies along with internal managerial reform.

• The Journal of the Korea Contents Association
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• v.12 no.7
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• pp.497-509
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• 2012

The purposed of this study was to evaluate the effects of psycho-social maturity personality improvement program for university students. This program based on the book written by Lee et al.(2010) to improve the personality for university student was used. The program consisted of a total of 13 session and every session consisted of a 50 minutes lecture and 100minutes activity program. The researcher carried out the pre-test, post test and follow up test regarding psycho-social maturity and conducted Mann-Whitney U test and the ancova. The results showed who had participated in counseling groups reported significant improvement of psycho-social maturity total scores and sub scores, while the control group did not report any significant improvements. After 10 weeks follow-up point, these changes experienced by the experiment group on the improvement of the psycho-social maturity. Finally the personality program helped improve the psycho-social maturity.

• Journal of the korean academy of Pediatric Dentistry
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• v.38 no.4
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• pp.362-367
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• 2011

The objective of this study is to measure the fear and anxiety levels of some middle school students in Gyeonggi Province, to analyze the relevant factors, to seek how to alleviate such fear and anxiety and thus enable to make a comfortable and efficient oral management. Six hundred twenty two middle school students in Gyeonggi Province participated in the survey, which used the data of 614 respondents, i.e. 337 males and 277 females. A frequency analysis was conducted to determine the distribution of answers for each question, a crosstabulation analysis was performed to verify the gender differences in answer and an Mann-whitney U test was used to compare fear scores. According to the results patients feared even in unexpected circumstances. In addition, they feared when receiving direct treatment. In terms of gender, female students showed higher levels of fear than male ones (p<0.05).

• Journal of The Korean Association For Science Education
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• v.20 no.4
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• pp.634-641
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• 2000

The degree of cognitive conflict, conceptual change, and the retention of conception in studying 'the cause of rising water at burning a candle in a bottle' with anomalous data were compared by age and gender. According to 'change of belief in initial theory', 7 types of responses to anomalous data were ordered by 4 levels. In comparing the results by age, producing cognitive conflict by anomalous data, conceptual change, and the retention of conception were found to be more effective for older students than younger students. However, the degree of cognitive conflict was not significantly correlated with the conception and retention tests scores. The results of Mann-Whitney U test revealed that there were no significant differences by gender in the degree of cognitive conflict, conceptual change, and the retention of conception.

• Korea journal of population studies
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• v.34 no.3
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• pp.139-155
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• 2011

The purpose of this study was to explore the effective policy on secondary childbirth encouragement of married women. The design for this study is a cross-sectional descriptive study. Samples were collected from 322 women who have one child younger than 6 years old. The instruments for this study was a questionnaire consisted of items about policy on childbirth encouragement. The data were analyzed by chi-square test, Mann-whitney's U test, and logistic regression with SPSS 17.0 program. The results showed that the employed women's intention of having a second child was affected by the age, working day per week, and policy on childbirth. But, in case of unemployed women, both of demographic and policy variables were not statistically significant. These findings suggest that different policy on support of birth, work-family life balance, and various tax benefits be developed to satisfy the needs of the employed women and the unemployed women.

• Korean Journal of Childcare and Education
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• v.9 no.5
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• pp.299-320
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• 2013

This research aims to develop and evaulate the effectiveness a group theraplay program for teachers than can boost full-day kindergarteners' ego resilence, peer competence and teacher-child relationships. A total of 14 children attending a full-day kindergarten located in Seoul were the subjects of this study. The experimental group consisted of 7 children exposed to 10 sessions of group theraplay for 50 minutes per session, held twice a week. The control group consisted of 7 children who did not receive any treatment. The teacher evaluated ego resilience, children's peer competence and student-teacher relationships to investigate two group's behavioral changes. Data analysis was done by performing the non-parametric Mann-Whitney test and Wilcoxon test after classifying and evaluating pre- and post-examinations of each group. The results of this research are as follows : The group theraplay program was found to be effective based on the study results of improving ego resilience and peer competence among full-day kindergartners and strengthening teacher-child relationships.

• Environmental Mutagens and Carcinogens
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• v.20 no.1
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• pp.34-39
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• 2000

Although shipbuilding workers were exposed to a variety of genotoxic compounds including polycyclic aromatic hydrocarbons (PAHs), limited number of studies were conducted to evaluate the biomarkers related to PAH exposure in painting workers in shipbuilding industry. One hundred and thirty three workers including 73 employees using coal tar paints were recruited from a shipbuilding company located in South Korea. Urinary 1-hydroxypyrene glucuronide (1-OHPG), as internal dose of PAH exposure, were measured by synchronous fluorescence spectroscopy after immunoaffinity purification using monoclonal antibody 8E11. Glutathione S-transferase (GST)M1 and GSTT1 genotypes were assessed by multiplex PCR. Information on demographic characteristics, smoking gabit, diet, job title, use of personal protective equipments were collected by self-administered questionnaire. Urinary 1-OHPG were higher in workers using coal tar paints than in workers using general paints, however, the difference was not statistically significant (p=0.20, Mann-Whitney U test). Urinary 1-OHPG levels in smokers were higher than in non-smokers (p<0.05 by Mann-Whitney U test) and there was a significant increase in urinary 1-OHPG levels with the numbers of cigarettes consumed per day (Spearman's correlation coefficient = 0.28, p=0.02). Genetic polymorphisms of GSTM1 and GSTT1 did not influence the level of 1-OHPG in study subjects. Multiple regression analysis show that smoking is the only significant predictor for lon-transformed 1-OHPG (overall model R2=0.1). These results suggest that workers using coal tar paints were exposed to significant amount of PAHs and individual difference in xenobiotic metabolism might affect the levels of internal dose of PAHs.

• Composites Research
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• v.23 no.6
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• pp.39-46
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• 2010

Acoustic emission (AE) signals are detected during the polymerization shrinkage of composite resin restoration in artificial dental ring according to various interfacial treatment conditions. AE amplitudes and the number of AE hit events were compared through the non-parametric statistics of Mann-Whitney method and Kruskal-Wallis method. The AE amplitudes detected from the PMMA and human tooth ring specimens were not significantly different according to adhesive conditions. The stainless steel ring specimen, meanwhile, had a difference in AE amplitude (p<0.05). The quantity of hit events for the human molar dentin specimens of the good bonding state was much less than that for the steel ring specimen but more than that for the PMMA ring specimen. For the same substrate, the better the bonding state, the less the AE hit events (p<0.05). The degree of marginal disintegration measured by SEM was proportional to the amount of AE hit events detected.

• Journal of The Korean Association For Science Education
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• v.22 no.2
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• pp.252-260
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• 2002

The types and the characteristics of students' responses to anomalous data in studying 'boiling point' were investigated, and the degree of cognitive conflict and conceptual change were compared by students' cognitive variables. Tests regarding field dependence-independence and logical thinking ability, a preconception test, and a test of responses to anomalous data were administered to 137 sixth graders. Among them, 90 students whose preconceptions were consistent with the presented initial theory were selected. After learning the scientific concept, students' conceptual change was examined. Six types of responses identified were as follows: Rejection, reinterpretation, exclusion, uncertainty, belief decrease, and theory change. The main responses were rejection (33%) and theory change (39%). The results of Mann-Whitney U test indicated students who were field independent and had higher logical thinking abilities felt more cognitive conflict and exhibited more conceptual change.

• Journal of Convergence for Information Technology
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• v.7 no.6
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• pp.45-52
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• 2017

The purpose of this study was to investigate the effects of husbands' help on postpartum depression and self-efficacy of mothers, to investigate what to fix of research design and to examine the feasibility of following experimental study. There was no significant difference in the general characteristics of two groups, which consisted 10 pairs of postpartum mothers and husbands, respectively, confirming the homogeneity of between groups. The prevalence of postpartum depression was 45% in the subjects who were measured at 1 week postpartum, and the average performance of the husbands' help in the experimental group was 3.2 out of 4 points. In the Mann-Whitney U Test, the husbands' help lowered the mean rank of postpartum depression in the experimental group(p<.001), and the mean rank of self-efficacy was higher than the control group, but there was no significant difference. In the process of this study, it was confirmed that, on the side of postpartum mothers of control group had burdens of responding to the questionnaire without the benefit of treatment so it is necessary to revise the design of following experimental study.