• The Journal of Korean Academy of Prosthodontics
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• v.32 no.2
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• pp.225-233
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• 1994

The restorations of the severely damaged teeth by post core have been increased with the developement of endodontic procedures. But high failure rates of these procedures being reported, various restorative modifications were induced for successful treatments. Cast post-core and prefabricated post with core buildups are choice of treatment. The main causes of failure of the restorations are the fracture of post and core, root fracture, and recurrent caries due to microleakage. Recently, the acid etching technique and the use of dentin bonding agent at tooth surface to reduce the possible microleakage at the tooth-restoration interfaces were introduced. The object of this study was to measure and compare the microleakage by the types and cementation methods of post-core. For this study, forty extracted human anterior teeth were selected for specimen. After cleansing and routine endodontic procedures, anatomic crowns of each specimen were removed at the level of 2mm above the cementoenamel junction. Canals were preparated for post insertion and specimens were divided into four groups randomly. Post-cores were fabricated according to method for each group. Microleakage was measured by length of dye penetration at the tooth-restoration interfaces with measuring microscope at 50 magnification. Oneway ANOVA and t-test were performed for statistical analysis of resulting data. The following results were obtained from this study. 1. There wert significant statistical differences in degree of microleakage between each group (p<0.01). 2. Cast post-core cemented with ZPC (Group I) showed the most severe microleakage pattern$(1.5547{\pm}0.0872mm)$, and cast post-core cemented with adhesive resin cement after tooth surface treatment with dentin bonding agent (Group II) showed the least microleakage $(0.1497{\pm}0.0872mm)$. 3. Group IV revealed less dye penetrations than group III, but no statistical significance was seen between two groups.

• Asian Pacific Journal of Cancer Prevention
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• v.14 no.1
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• pp.571-578
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• 2013

Background: Patients with breast cancer can experience a feeling of hopelessness very deeply in the adjustment process, and the social support provided during this period can be effective in increasing the level of hope. The present study aimed to identify breast cancer patients' social support and hopelessness level. Materials and Methods: The target population of this analytical study was all breast cancer patients (total of 85) who had treatment in the oncology department of a university hospital located in Adana/Turkey and who met the inclusion criteria. Data were collected through "Personal Information Form", "Beck Hopelessness Scale (BHS)" and "Multidimensional Scale of Perceived Social Support" (MSPSS). Analysis was performed using Shapiro Wilk, One Way ANOVA Welch, Student t-test, Mann Whitney U, and Kruskall Wallis tests. Homogeneity of variance was tested with the Levene, Bonferroni and Games Howell tests. Mean scores and standard deviation values are given as descriptive statistics. Results: Average age of the participants with breast cancer is $48.6{\pm}10.6$. Of all the participants, 84.7% are married, 49.4% graduated from primary school, 81.2% are housewives, and 82.4% had children. The participants' multidimensional perceived social support total scores were found to be high ($57.41{\pm}13.97$) and hopelessness scale scores low ($5.49{\pm}3.80$). There was a reverse, linear relationship between hopelessness scale scores and social support total scores (r=-0.259, p=0.017). A statistically significant relationship was found between hopelessness scores and education level and having children, occupation, income status, and education level of spouses (p<0.05). Conclusions: The present study indicates that hopelessness of the patients with breast cancer decreased with the increase in their social support. Therefore, activating patient social support systems is of importance in increasing their level of hope.

• The Research Journal of the Costume Culture
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• v.17 no.1
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• pp.162-176
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• 2009

This study is to compare clothing purchasing behaviors between Korean and American college students, especially men. A theoretical study was reviewed, then the survey was performed. 200 questionnaires were utilized for this study. The SPSS 12.0 was used to analyze the technical statistics like average, frequency, t-test, $X^2$, and factor analysis. The result showed, first there were some differences in most of all the clothing Purchasing behaviors such as the reason for the purchases, the purchasing information source, the standard of selecting clothes and the standards of selecting stores. There were slight differences in the reasons for the purchases between Korean and American college men. Both of them said that they purchase clothes to satisfy their needs and the situation. The American college men were slightly higher than the Korean college men for both the need.situation and impulse motive. Regarding the information sources for the purchase, The Korean college men were slightly higher than the American college men for the media information sources and lower than them for the human information sources. Regarding the standard for store selection, the college men from both countries considered product service to be the most important. The American college men considered the convenient and store services to be more important than Korean college men. Regarding the standard fur clothes selection, the Korean college men considered the clothing that matched their personal styles to be the most important standard, however, the American college men considered the attractive from the opposite sex as the important standard.

• The Journal of Korean Association of Computer Education
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• v.16 no.5
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• pp.59-68
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• 2013

The purpose of this study is to analyze the satisfaction and effective variables in online learning for low-income students. An Web-survey was conducted to measure its satisfaction and effectiveness. 285 students participated in the study. T-test and ANOVA were used to analyze the data. The result of satisfaction was fairly positive. In addition, there were differences in effectiveness. In specific, the each group of female, elementary school, higher level of achievement, and higher level of self-regulated learning group students showed higher satisfaction than the others. Suggestions and future research are discussed.

• Journal of Digital Convergence
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• v.16 no.6
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• pp.95-104
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• 2018

This study is focused on analyzing the difference by demographical characteristics of users on acceptance behavior of tourism omnichannel based upon Unified Theory of Acceptance and Use of Technology. Through field survey with 392 respondents, the results are as follows. Partially differences on acceptance behavior are found according to gender, age, education and job as demographic characteristics of tourism omnichannel. And the difference by demographic characteristics on acceptance behavior about preferring tourism information is not significant. However performance expectancy and effort expectancy as factors of UTAUT are significantly positive in thirties group of tourism omnichannel users.

• Korean Journal of Adult Nursing
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• v.22 no.3
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• pp.281-290
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• 2010

Purpose: This purpose of this study was to identify the factors related to the health related quality of life among institutionalized elders. Methods: The subjects were 247 elders institutionalized among one of the four nursing homes in Busan. Data were collected through interview with four standardized questionnaires from August to October, 2008. Questionnaires were related to health related quality of life (SmithKline Beecham's Quality of Life scale, SBQoL), quality of sleep(Pittsburgh Sleep Quality index, PSQI), activity of daily living (Katz ADL Index), and depression (Geriatric Depression Scale Short Form Korea, GDSSF-K). Data were analyzed for descriptive analysis, t-test, one-way ANOVA, Pearson's correlation coefficient, and stepwise multiple regression by using SPSS/WIN 17.0 program. Results: The mean HRQoL in the subjects was $6.62{\pm}0.91$. Percentage of the respondents reporting sleep disorders were 72.5% and 27.1% reported being vulnerable to depression. The significant predictors of the HRQoL were sleep quality, activity of daily living (ADL), level of education, and depression. The factors accounted for 28.8% of variance in the health related quality of life of institutionalized elders. Conclusion: Sleep quality, activity of daily living, and depression need to be considered as the important control factors for improving the health related quality of life in the institutionalized elders.

• Journal of dental hygiene science
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• v.14 no.2
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• pp.176-182
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• 2014

This study aimed to arrive at reasonable and realistic prices for professional tooth cleaning (PTC) in order to expand its clinical utilization. The study involved 214 dental implant patients who received PTC. Cross-tabulation, one-way ANOVA, t-test, and stepwise multiple regression were performed for analysis. The mean satisfaction score was 4.60 points, and 92.5% of all subjects were willing to receive PTC consistently. The most common reason to receive PTC was a feeling of refreshment in 84.7%, and 84.1% were willing to pay for PTC. The mean willingness-to-pay price was 28,100 won, and the mode was 10,000 won. Willingness-to-pay price increased as average monthly income and satisfaction level for PTC were higher. The price also increased with age and was higher in women than men. Suggesting and settling reasonable and realistic prices for PTC are expected to be useful in maintaining the long-term health of the dental implant and reducing socio-economic costs.

• Journal of dental hygiene science
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• v.20 no.2
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• pp.67-73
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• 2020

Background: Owing to the increase in the aging population, the health problems of the elderly have become important social problems. Social support has a positive effect on improving the quality of life and prolonging the life of elderly people. It is one of the major factors that affects the oral health status of elderly people. The purpose of this study was to examine the relationship between oral health status and social support in elderly people using representative data. Methods: In this study, data from a community health survey in 2015 involving 63,929 elderly people aged over 65 years were analyzed. T-test and ANOVA analyses were performed to compare the general characteristics of and perception about social support. Additionally, a linear regression analysis was performed to confirm the relationship between perceptions about social support and subjective oral health status. Results: We found that sex, age, household income, education level, the presence of a spouse, existence of an unmet dental need, and regular oral check-up had a significant effect on subjective oral health status (p<0.05). In addition, when controlled for all factors, social support has a significant impact on subjective oral health status. Conclusion: The findings indicate that social support is associated with the subjective oral health status of Korean elderly. This suggests that community-level or government investment is required to improve the oral health of the elderly. In particular, policy interventions such as the establishment of facilities that promote social networks, especially facilities based on friendship networks, are needed.

• Journal of Korean Society of Steel Construction
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• v.23 no.3
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• pp.357-365
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• 2011

The current trends in steel construction intend to use tapered sections to minimize as much as possible the use of excess material. This can be done by choosing the cross-sections to be as economical as possible, leaving the classical approach of using prismatic members. In addition, it is important to predict the buckling behavior of tapered member with large depth-to-thickness ratio in order to prevent the collapse of PEB system subjected to overloads. An experimental investigation of buckling behavior of tapered beam was presented. The primary test parameter was depth-to-thickness ratio and taper ratio. Using initial stiffness and load-carrying capacity proposed by current provision, the simple plastic hinge method using modified Yoda's model and finite element analysis, the prediction of a moment-rotation curve of linearly tapered member was presented. Moreover, comparisons between analytical and experimental data for moment-rotation curves were accomplished.

• Journal of Home Health Care Nursing
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• v.25 no.1
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• pp.5-14
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• 2018

Purpose: The purpose of this study was to provide basic data for the development of a health care program to maintain and promote the health of Korean international students. Methods: Participants were 180 Korean students studying at one US state university. Data collection was conducted from January 23 to April 23, 2017. Data were analyzed using descriptive statistics: t-test, ANOVA, Pearson's correlation coefficient, and stepwise multiple regression analysis with the SPSS/WIN 22.0 program. Results: The mean score on health beliefs was $3.49{\pm}0.39$, and the mean social support score was $2.96{\pm}0.54$. The mean health-promoting behavior score was $2.80{\pm}0.37$. Health-promoting behaviors had a statistically significant positive correlation with health beliefs and social support. Additionally, perceived health status, perceived barriers, perceived benefits, cues to action, and social support were related to health-promoting behaviors among Korean students. These five variables explained 47.6% of health-promoting behavior. Conclusion: The results of this study showed that higher health beliefs and social support of Korean international students resulted in better health-promoting behaviors. Additionally, the findings suggested that the health of Korean international students could be maintained and promoted through the development of systematic and practical programs to secure social support.