• Restorative Dentistry and Endodontics
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• v.25 no.3
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• pp.381-389
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• 2000

Lateral condensation with gutta-percha and sealer has been shown to provide an excellent apical seal; however, the lateral condensation technique has demonstrated less favorable apical leakage results in curved canals when compared with straight canals. Placement of endodontic spreaders to within 1 to 2mm of the root canal working length has been advocated for optimum gutta-percha obturation. Due to their stiffness, stainless-steel(SS) spreaders will often fail to achieve this position in curved canals. Newly marketed nickel-titanium(NT) spreaders may offer an advantage in this regard due to the increased flexibility of these instruments. The purpose of this study was to evaluate the effect of NT finger spreader on the sealing ability in lateral condensation technique, compared with conventional SS finger spreader. Twenty four standardized resin models simulating curved canals(30 degree) were randomly placed into 2 groups and instrumented to a #30 master apical file size with Ni-Ti Profile .04 taper series using step down technique. Each groups was obturated with standardized gutta-percha cone by standard lateral condensation technique using SS finger spreader, NT finger spreader. And then, each model was sectioned horizontally with microtome at 1, 2, 3, 4, 5mm levels from the apex. At each of 5 levels, ratio of the area of gutta-percha was obtained by calculating the area of gutta-percha to the total area of the canal. The data collected were then analyzed statistically using a t test for independent samples. The results as follows ; 1. The total mean ratio of area of gutta-percha was 89.20${\pm}$7.00(%) for SS spreader group. 92.20${\pm}$5.17(%) for NT spreader group. There was statistically significant difference between each group(p<0.05). 2. At 3mm level, the mean ratio of area of gutta-percha was 88.32${\pm}$5.41(%) for SS spreader group, 95.25${\pm}$2.60(%) for NT spreader group. There was statistically significant difference between each group(p<0.05). At 1,2,4mm levels, NT spreader group showed greater mean ratio of area of gutta-percha than SS spreader group, too. But there was no statistically significant difference. 3. At 5mm level, the mean ratio of area of gutta-percha was 91.83${\pm}$3.42(%) for SS spreader group, 87.91${\pm}$3.68(%) for NT spreader group. There was statistically significant difference between each group(p<0.05). This study concluded that the NT spreader demonstrated somewhat favorable apical sealing effect than SS spreader in prepared curved canals. The clinical use of NT spreaders may enhance our ability to create better apical seals in curved canals, but further studies in this area will help clarify some of the remaining areas with which practitioners are concerned, such as compaction forces exerted by NT spreaders.

• Restorative Dentistry and Endodontics
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• v.33 no.3
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• pp.204-212
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• 2008

The purpose of this study was to compare the apical microleakage in root canal filled with Resilon by methacrylate-based root canal sealer or 2 different self-adhesive resin cements. Seventy single-rooted extracted human teeth were sectioned at the CEJ perpendicular to the long axis of the roots with diamond disk. Canal preparation was performed with crown-down technique using Profile NiTi rotary instruments and GG drill. Each canal was prepared to ISO size 40, .04 taper and 1 mm short from the apex. The prepared roots were randomly divided into 4 experimental groups of 15 roots each and 5 roots each for positive and negative control group. The root canals were filled by lateral condensation as follows. Group 1: Guttapercha with AH-26, Group 2: Resilon with RealSeal primer & sealer, Group 3: Resilon with Rely-X Unicem, Group 4: Resilon with BisCem. After stored in $37{\circ}C$, 100% humidity chamber for 7 days, the roots were coated with 2 layers of nail varnish except apical 3 mm. The roots were then immersed in 1% methylene blue dye for 7 days. Apical microleakage was measured by a maximum length of linear dye penetration after roots were separated longitudinally. One way ANOVA and Scheffe's post-hoc test were performed for statistical analysis. Group 1 showed the least apical leakage and there was no statistical significance between Group 2, 3, 4. According to the results, the self adhesive resin cement is possible to use as sealer instead of primer & sealant when root canal filled by Resilon.

• Journal of Korean Public Health Nursing
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• v.16 no.1
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• pp.95-104
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• 2002

Purpose : This study was conducted to investigate the extent to which the professional self concept between the psychiatric mental health nurse practitioner (PMHNP) and general nurse in psychiatric ward was comparable. The results were expected to provide basic data for developing the construct of professional self concept and making awareness of the importance of the program increasing professional self concept. Method : The subjects of this study were 227 PMHNP and 436 general nurse in psychiatric ward. The instruments used for this study were PSCNI by Arthur (1990), PSI by Heppner and Peterson(1982) and the index of work satisfaction by Slavitt et al.(1978). With the aid of the SAS, t-test. two-way ANOVA and stepwise multiple regression were conducted. Result : 1. The average item score of PSCNI of PMHNP was $2.82\pm0.27$. and that of general nurse was $2.66\pm0.27$. Statistically significant difference between two groups was found(p=0.0000) 2. There was statistically significant difference between two groups in the score of professional practice(p=0.0000), satisfaction(p=0.0024), leadersbip(p=0.0000) , flexibility(p=0.0000) and skill (p=0.0000). 3. Statistically significant differences between the two groups were observed in terms of age(p=0.0003), marital status(p=0.0001). education(p=0.0005), religion(p=-.0144), motive (P=-.0001), length of service as a nurse(p=0.0121), the length of service in psychiatric unit(p=0.0143). However there were no significant interaction effect with group and age, marital state. education, religion, motive, length of service as a nurse, length of service in psychiatric unit. 4. Job satisfaction (JS) and problem solving inventory score(PS) were found to be the highest factor predicting the professional self concept between the PMHNP and general nurse. JS and PS accounted for $43.4\%$ in the professional self concept of PMHNP, whereas PS, JS, age and religion accounted for $53\%$ in the professional self concept of general nurse in psychiatric ward. In conclusion, this study suggested that we need to develop programs and polices to increase the professional self concept of nurse, particularly of psychiatric mental health nurse practitioners.

• Korean Journal of Childcare and Education
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• v.3 no.2
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• pp.22-47
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• 2007

The purpose of this study was to examine whether parental beliefs, value of children, and filial obligation were related. The subjects were 748 students(male 323, female 425) who were currently enrolled at university located in Seoul. The instruments used for this study were Filial Obligation Scale(Cho, 2002), Parenting Beliefs Questionnaire, and Value of Children by Arnold et al.(1975, 2001). Data were analyzed using descriptive statistics, t-test, ANOVA, and Pearson's correlations by SPSS PC Program. The results showed that university students generally demonstrated a higher level of individual-oriented beliefs than relation-oriented beliefs on parental beliefs. With regard to parental beliefs, family relation-oriented beliefs was relatively low in comparison with independence/autonomy-oriented beliefs, happiness-oriented beliefs, and cognition/knowledge-oriented beliefs. In addition, emotional value of children was relatively high in comparison with instrumental value of children. Also, male university students possessed a higher level of filial obligation. the level of cohabitation experience with their parents played a significant role in affecting the level of filial obligation. Unsurprisingly, a higher relation-oriented parental beliefs and emotional value of children demonstrated a higher level of filial obligation. There were also positive relationships between emotional value, instrumental value, and filial obligation. Hence, this study suggests that a practical, functional training services and resources for future parents must be ensued.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.9 no.2
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• pp.288-299
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• 2002

The patients with abdominal surgery usually have acute pain. It is important for a patient's qualify of life and for good recovery after surgery to control the postoperative pain. The purpose of this study is to identify the relationship between emotional state of preoperative patients and postoperative pain. The participants in this study were the 100 patients receiving abdominal surgery who received Intravenous Patient Controlled Analgesia (IV-PCA) at the end of the operation. The data were collected using questionnaires and the period of the data collection was from March to August, 2001. The instruments used for this study were The State-Trait Anxiety Inventory (STAI) Developed by Spielberger (1972), The Center for Epidemeologic Studies-Depression (CESD) scale and Visual Analog scale (VAS). The data were analyzed using descriptive statistics. t-test, ANOVA and Pearson Correlation coefficient with the SPSS program. The results are as follows. 1. For general characteristics there were significant differences in the degree of trait anxiety according to gender (p= 0.0010), marital status (p=0.0122), religion (p=0.0040), education (p=0.0001), occupation (p=0.0002). monthly income (p=0.0001), diagnosis (p=0.0001), and operation title (p = 0.0001). 2. For general characteristics there were significant differences in the degree of state anxiety according to gender (p= 0.0023), education (P=0.0073), monthly income (p=0.0001), diagnosis (p=0.0005), and operation title (P =0.0063). 3. For general characteristics there were significant differences in the degree of depression according to gender (p= 0.0073), occupation (p=0.0469), monthly income (p=0.0001), diagnosis (p=0.012). and operation title (p =0.0033). 4. For general characteristics there were significant differences in the degree of postoperative pain according to gender (p=0.0213), marital status (p=0.0082), education (p=0.0016), occupation (p =0.0128). monthly income (p=0.0008), diagnosis (p =0.0007), and operation title (p =0.0008). 5. The relationship between trait anxiety and postoperative pain revealed a significant positive correlation (r =0.51, p =0.0001), and the relationship between state anxiety and postoperative pain revealed a significant positive correlation (r=0.50. p=0.0001) and the relationship between Depression and pain revealed a significant positive correlation (r =0.49. p =0.0001).

• Journal of Korean Public Health Nursing
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• v.14 no.2
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• pp.355-371
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• 2000

The purpose of this study was to explore and compare health-promoting behaviors and its relationships with associated variables between Korean elderly and Korean-American elderly. Study instruments were questionnaire that consisted of socioeconomic characteristics, health-promoting lifestyle patterns. self-esteem and self-efficacy. Data were collected from convenient sample of 150 Korean elderly and 110 Korean-American elderly recruited from senior centers. Collected data were analyzed by t-test. ANOVA, and Pearson correlation coefficients. The results are followings : 1. In religion, $32.7\%$ of Korean elderly were protestant. while $32.7\%$ of Korean-American. elderly were protestant. $61.3\%$ of Korean elderly were living with their children, and only $17.3\%$ of Korean-American elderly were living with their children. 2. There was no significant difference in the mean HPLP score in two groups. but Korean elderly showed higher practices in health responsibility. exercise. and stress management than that of Korean-American elderly. The subjects showed the highest practices in nutrition(3.14. 3.01), and the lowest practices in exercise (2.14, 1.92). 3. The mean HPLP score of Korean elderly was 2.63, showing significant relationships with age. education and economic status. the score of Korean-American elderly was 2.54, showing significant relationships with education. 4. Self-esteem score of Korean elderly was 2.72 and Korean-American elderly was 2.73. there was no significant difference in two groups. The score of self-esteem of Korean-American elderly was showing significant relationships with presence of spouse. 5. Self-efficacy score of Korean elderly was 3.27 and Korean-American elderly was 3.21. there was no significant difference in two groups. The score of self-efficacy of both groups were showed significant relationships with education. 6. The HPLP of Korean and Korean-American elderly showed(r=.24. r= .49) positive correlations with self-esteem had positive correlations with self-efficacy(r=.42. r=.28). To draw concrete resolution for health promotion of Korean and Korean-American elderly. this study suggests followings for future research : 1. Nursing interventions enhancing exercise and stress management of the elderly must be provided. Especially developing and adopting feasible exercise programs for Korean-American elderly is highly needed. 2. Identifying the influences of culture on their practices of health-promoting lifestyle patterns among Korean. Korean-American and other racial elderly groups.

• Journal of Korean Academy of Nursing
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• v.26 no.3
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• pp.709-729
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• 1996

This study was done to analyze the trends of research on coping in Korea, to suggest future direction, for research on coping, and ultimately to contribute to an increase in explanation of adaptation. This article reviewed 79 nursing research papers on coping done since 1978 by examining them according to the period of publication or presentation, research design, type of subjects, measurement instruments, research for a degree or not, range of reliability, and association of coping and related variables. The results are as follows : The number of studies on coping increased rapidly from the mid-1980's and decreased slowly from the mid-1990's. The maority of the studies were surveys, comparative studies, or correlational studies. The subects of the 46 studies were healthy people, while those in the remaining studies were patients with a variety of illnesses. Thirth-eight studies on coping were done for master's thesis, three for dissertion, and 38 were not degrees. The Bell and Jalowiec coping scales have not been used since the early 1990's. In contrast, Lazarus and Folkman's W.C.C.L. has been used increasingly since that time. The reliabilities of the coping scale were reported in 37 cases and the Cronbach's alpha coefficients were .71 to .86. All subjects reported using more problem-oriented coping than emotion-oriented coping in short-term or emotion-oriented coping and healthy groups did more long-term coping. It was difficult to describe consistently the relationship between stress and coping according to the type of coping scale or research subjects, but generally moderate relationships were found. This was due to instrumental problems and no consideration of situational context. The subject group who used more short-term coping and less long-term coping reported poorer mental status, and higher scores in burnout and state anxiey than others. That is, the relationship between stress and adaptation increased the power of explanation with intervening the mediating effect of coping. The association of locus of control, mastery, social support, and self-concept with coping showed positive relationships : those of uncertainty and severity in illness with coping showed negativerelationships ; those of state anxiety and depression with short-term coping were positive, and those of self-esteem with long-term coping or problem-oriented coping were negative. There were significant differences in the scores of types of coping according to religion, level of education, and socio-economic status. That is, Presbyterians and Catholics, those with higher education levels and higher socio-economic status used more long-term or problem-oriented coping. On the basis of the above findings the following recommendations are made : 1. There is a need to test the mediating effect of coping variable in order to clarify the concept. 2. Longitudinal studies are needed to determine the patterns of change in coping strategies when stressful events are encountered. 3. It's necessary to develop a reliable and variable measurement tool for coping. 4. There is a need to identify subscales of coping to increase explanation of variance 5. It's necessary to consider personal, situational, and antecedent variables : the characteristics of subject populations, the natures of illness and treatment situations. 6. The power of explanation of studies designed to identify the stress-adaptation process should be increased using the combination model of process-oriented coping and cognitive-structural model.

• Journal of the Korean Home Economics Association
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• v.25 no.2
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• pp.39-54
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• 1987

One's Clothing Satisfaction, has a great influence on his role behavior in a society. Especially, as for the teacher's and the professors whose role is teaching, it can not be too emphaszed. Above all, high school girls and college women are the most likely to be influenced by their teachers' clothing behavior, to whom they pay their respect in every way. From this point of view, this study was aimed at explaining, the correlation between the teachers/professors' clothing behaviors and the learning efficiency. On clothing behaviors assessed 30 items related with the learning efficiency, selected from the instruments of preceding studies, and modified by the factors dealing with modesty, color, and design. The questionnaires were composed of two major categories: those for students and for teachers/progessors. The subjects of this study were included students and teachers/professors of high school and universities in Seoul. The data were analyzed statically by mean, standard Deviation, and F-test. The results of this study were summerized as follows; 1. The clothing behaviors of the teachers/professors influenced on the learning efficiency. Namely teachers' clothing satisfaction is in direct proportion to them teaching efficiency and students' learning efficiency. 2. Among the clothing behavior variables, modesty had a great influence on the learning efficiency, especially as for that of teachers more than professors. 3. The influence of the teachers'/professors' clothing behaviors on the learning efficiency showed no significance between high school girls and college women, but some significance between the grades of collegians. 4. As for the teachers'/professors' clothing behavior, male teachers/professors gave priority to design and female teachers/professors to modesty, color showed no significance between them irrespective of age. 5. As for the clothing behavior variabels, both the teachers/professors and the students showed some significance. In class the teachers/professors highly responded to their own clothing behaviors than the students. 6. According to priority the most favorable clothing colors for male teachers/professors are navy blue, gray, indigo blue, and black, and the most disgusting ones red, mud yellow, violet, pink, and green. The most favorable clothing colors for female teachers/professors are beign, white, pale yellow, and black, and the most disgusting ones red, mud yellow, and yellow and yellow according to priority. It is that teachers/professors should wear modestly and in color harmony to invite the desirable students' will to study. Teachers'/professors' colorful appearance and heavy toilet bring about a drop in the students' will to study.

• Journal of Radiation Protection and Research
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• v.40 no.1
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• pp.46-54
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• 2015

The thermoluminescence (TL) and optically stimulated luminescence (OSL) are commonly used to measure and record the expose of individuals to ionization radiation. Design and performance test results of a newly developed TL and OSL measurement system are presented in this paper. For this purpose, the temperature of the TL material can be controlled precisely in the range of $1{\sim}1.5^{\circ}C$ by using high-frequency (35 kHz) heating system. This high-frequency power supply was made of transformer with ferrite core. For optical stimulation, we have completed an optimal combination of the filters with the arrangement of GG420 filter for filtering the stimulating light source and a UG11 filter at the detecting window (PMT). By using a high luminance blue LED (Luxeon V), sufficient luminous intensity could be obtained for optical stimulation. By using various control boards, the TL/OSL reader device was successfully interfaced with a personal computer. A software based on LabView program (National Instruments, Inc.) was also developed to control the TL/OSL reader system. In this study, a multi-functional TL/OSL dosimeter was developed and the performance testing of the system was carried out to confirm its reliability and reproducibility.

• Journal of The Korean Association For Science Education
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• v.33 no.6
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• pp.1139-1153
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• 2013

Misconceptions are one of the most important and long-lasting studied themes on science education. It is because their nature is obstinate and settled as well as they corrupt students' understanding of science concepts. This study examines whether preservice elementary school teachers enrolled in biology teaching material research course changed positively on science teaching efficacy and correcting life science misconceptions when they used the handbook developed for this study. The handbook comprises 203 life science concepts surveyed among preservice teachers holding from advanced researches and arranged by 2007 Revised Science Curriculum. 107 preservice elementary school teachers participated in the study. Forty-six (46) of them were assigned to the experimental group and the other 61 to the control group. ANOVA was conducted for analyzing data. Science Teaching Efficacy Belief Instrument (STEBI) and the life science misconception test which was developed for this study, were administrated as assessing instruments for pretest and posttest. The experimental group, using the handbook, acquired higher scores in both tests on statistical significance level than the control group who were not using the handbook. The results indicate the handbook developed for correcting life science misconceptions for this study is effective in enhancing science teaching efficacy and correcting life science misconceptions.