• Journal of Digital Convergence
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• v.11 no.10
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• pp.493-505
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• 2013

We investigated the effect of red ginseng extracts on blood biochemical parameters, bone density and bone inorganic components etc. and data were analyzed by one-way ANOVA and Post-Hoc Test. In the results of our study, the level of albumin and HDL, Ca, P, Mg, and estradiol in blood, and the content of Ca, P, ash in femur were significantly increased in red ginseng treated group than in OVX group, and the level of ALP, AST, ALT, blood glucose, total cholesterol, triglyceride, LDL, creatinine, osteocalcin, and N-terminal telopeptide were significantly decreased in red ginseng treated group than in OVX group (p < 0.01). From these results, we knew that within the normal level, red ginseng extracts improved liver and kidney function, component of glucose and lipid in blood, bone density, bone ash and inorganic components in femur, and index related with bone metabolism.

• Restorative Dentistry and Endodontics
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• v.21 no.2
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• pp.664-676
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• 1996

테트라싸이클린에 의한 치아 변색은 심미성을 고려한 임상 치료시 커다란 난제로 남아 있다. 본 연구는 백서 치아에 테트라싸이클린을 주입하여 야기되는 색상과 구조적인 변화도를 측정하여 향후 연구에 기초자료를 제공하기 위해 시행되었다. 24 마리의 백서를 각기 8 마리씩 3 군으로 분류하여 대조군은 정상적인 사육을 식염수군은 TC군과 동량의 식염수를 주사하였으며 TC군은 12 ml에 용해시킨 60 mg의 테트라싸이클린을 복강내로 2 주간 주입하였다. 최종 주입후 1 주간 정상 사육한 다음 cervical dislocation법에 의해 희생시켜 시편을 채득한 후 각 치아를 횡단하여 실물현미경과 FlexCam을 이용하여 컴퓨터에 영상을 저장한 다음 색 변화량을 Adobe Photoshop으로 측정하였으며 구조변화는 주사전자 현미경을 이용하였다. 치아색 변화량의 유의성 검정은 ANOVA와 Scheffe test를 이용하였으며 본 실험 결과는 다음과 같다. 1. 각 군의 $a^*$ 수치는 대조군 -6.12 (1.18), 식염수군 -8.00 (1.33), TC군 -18.56 (2.52)로 나타났으며 $b^*$ 수치는 대조군 1.12 (2.13), 식염수군 1.62 (1.45), TC군 28.67 (5.18)을 보였다. 즉 테트라싸이클린에 의해 $a^*$와 $b^*$의 수치가 유의성있게 (p<0.01) 초록색과 노란색 방향으로 변화하였다. 2. 테트라싸이클린에 의해 치경부 법랑질 외면이 검게 변색되었으며 울퉁불퉁한 양태로 변화되었다. 그러나 법랑소주의 형태, 방향등은 차이를 보이지 않았다. 3. 각 군간 상아세관의 수, 방향, 크기등이 차이가 없었다. 치수측에서의 관찰결과 대조군과 식염수군에서는 상아세관들의 입구가 크고 명확하게 보인 반면 TC군에서는 입구가 좁고 부분적으로 막힌 양태도 관찰되었다.

• Journal of the Korea Convergence Society
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• v.12 no.12
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• pp.539-550
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• 2021

The purpose of this study was to identify the influencing factors of satisfaction for clinical practice, critical thinking disposition on clinical competency in nursing students who have experienced non-face-to-face clinical practice. The participants in this study were 163 nursing students at four university. A on line survey was conducted from January 2021 to February, 2021. The data were analyzed using t-test, ANOVA, scheffé test, pearson correlation coefficients, and multiple regression analysis by SPSS 22.0 version. The results of this study indicate that satisfaction for clinical practice, and critical thinking disposition have an influence on clinical competency in nursing students. The total explanation of clinical competency was 60.6%. Based on this, it is suggested to develop a program to improve clinical practice satisfaction and critical thinking tendency to increase clinical performance of nursing students who have experienced non-face-to-face clinical practice.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.2
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• pp.311-320
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• 2019

This study is a descriptive study to investigate the relationship between sexual function, sleep quality, and depression in male cirrhosis patients. Data were collected from a structured questionnaire from August 16, 2017 to January 30, 2018. Data were collected by t-test, ANOVA, Scheffe test, Pearson correlation. AS a result, the lower the sexual function of male cirrhosis patients, the lower the quality of sleep (r=-.232, p =.005) and the higher the depression score (r=-.381, p<.001) The lower the score, the higher the score of depression (r=.561, p<.001). Sexual function, quality of sleep and depression were found to be statistically significant. The results of this study can be used as basic data for the development of nursing intervention for male cirrhosis patients.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.636-646
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• 2017

This study examined the factors influencingthe adaptation to university life of nursing students. Data were collected from 235 nursing students in three nursing schools in B and C city from November 15 to December 10, 2016, and analyzed using descriptive statistics, t-test, ANOVA, Pearson's correlation coefficient, and stepwise multiple regression. Correlations were found between adaptation to university life and life stress (r=-0.657, p<0.001) and between ego-resilience (r=0.455, p<0.001) and spiritual well-being (${\beta}=0.210$, p=0.025)(r=0.494, p<0.001). The adaptation to university life in participants showed a significant correlation between life stress (r=-0.657, p<0.001), ego-resilience (r=0.455, p<0.001), and spiritual well-being (r=0.494, p<0.001). The significant factors influencing the adaptation to university life were life stress (${\beta}=-0.418$, p<0.001), health status(${\beta}=0.213$ p<0.001), spiritual well-being (${\beta}=0.210$, p=0.025), satisfaction with major (${\beta}=0.146$, p=0.003), and ego-resilience (${\beta}=0.109$, p<0.001); these factors explained 56.5% of the variance. The findings suggest that adequate educational strategies are needed to reduce the life stress and increase health status, spiritual well-being, satisfaction on major, and ego-resilience in nursing students to promote their adaptation to university life.

• Restorative Dentistry and Endodontics
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• v.30 no.4
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• pp.294-302
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• 2005

The purpose of this study was to evaluate the canal configuration after shaping by ProFile. ProTaper and K-Flexofile in simulated resin canals with different angles of curvature. Three types of instruments were used: ProFile. ProTaper. K-Flexofile. Simulated root canals. which were made of epoxy resin. were prepared by ProFile. ProTaper with rotary instrument using a crown-down pressureless technique. and hand instrumentation was performed by K-Flexofile using a step-back technique. All simulated. canals were prepared up to size 25 file at end-point of preparation. Pre and post instrumentation images were recorded with Scanner. Assessment of canal shape was completed with Image Analysis program. Measurements were made at 1. 2. 3. 4. 5. 6. 7. 8. 9 and 10mm from the apex. At each level. outer canal width. inner canal width. total canal width. and amount of transportation from original axis were recorded. Instrument deformation and fracture were recorded. Data were analyzed by means of one-way ANOVA analysis of variance and the Sheffe's test. The result was that ProFile and ProTaper maintain original canal shape regardless of the increase of angle of curvature than K-Flexofile. ProFile show significantly less canal transportation and maintained original canal shape better than ProTaper.

• The Journal of the Korea Contents Association
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• v.22 no.1
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• pp.571-580
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• 2022

This study was a descriptive research to investigate clinical violence experience, response to violence experience, resilience and academic burnout and to identify the factors affecting the academic burnout among nursing students. The participants were 318 nursing students. who were recruited from the 2 Department of Nursing in B Metropolitan and 2 Department of Nursing in Gyeongsangnam-do. The structured questionnaire was self-administered from November 1 to 30, 2019. Data were analyzed through the SPSS/WIN 24.0 program using descriptive statistics, Independent t-test와 one-way ANOVA, Scheffe test, Pearson's correlation coefficient, and stepwise multiple regression. According to the results of this study, Mean score for academic burnout in nursing student was 2.58 out of 4 point. The factors of satisfaction with clinical practice(β=-.393, p<.001), satisfaction with nursing major(β=-.188, p<.001), responses to violence experience(β=.176, p<.001), perceived health status(β=-.156, p<.001) attacker(β=.135, p=.002), resilience(β=-.118, p=.016)were impact on the academic burnout level of nursing students. The total explanatory power accounted for 45.9%. In conclusion, since clinical practice satisfaction and major satisfaction are the factors that have the greatest influence on academic burnout, it is necessary to develop various educational strategies and a student counseling program to reduce negative reactions after experiencing violence and improve resilience. In addition, a qualitative study on the clinical violence experience, response to violence experience and academic burnout of nursing students is needed.

• Journal of the Korean Society of Radiology
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• v.6 no.5
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• pp.421-426
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• 2012

The purpose of this study was to investigate the knowledge of dental hygiene students of the quality assurance of dental radiation such quality assurance and related educational experiences in an effort to accelerate the preparation of a curriculum for systematic quality-assurance. The subjects in this study were 453 dental hygiene students who participated in dental radiography courses. Varied statistical analyses such as frequency analyses, reliability, chi-square, and independent samples t-tests were conducted on the data collected, using SPSS 12.0. Scheffe test was also used after one-way ANOVA as post-hoc tests. Results showed that (a) the students' acknowledge level of Radiographic Quality Assurance was $7.71{\pm}1.7$ out of 12 on average. The more theory and practical classes students took, the higher points they got (p<0.001); (b) Most of the students experienced 1-3 lessons out of 13 in practical training and 26.3% of students did not take any practical lesson. ;(c)Students who did not take any practical training got 7.20 points out of 13, students who took 1-3 lessons got 7.84 points out of 13, students who took 4-5 lessons got 7.87 points out of 13, and students who took more than 6 lessons got 8.14 points out of 13 on average. The more practical classes they took the higher acknowledge level they were. Therefore it needs to provide adequate practical lessons to them.

• Restorative Dentistry and Endodontics
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• v.31 no.3
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• pp.179-185
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• 2006

This study was conducted to evaluate canal configuration after shaping by $ProTaper^{TM}$ with various rotational speed in J-shaped simulated resin canals. Forty simulated root canals were divided into 4 groups, and instrumented using by $ProTaper^{TM}$ at the rotational speed of 250, 300, 350 and 400 rpm. Pre-instrumented and post-instrumented images were taken by a scanner and those were superimposed. Outer canal width, inner canal width, total canal width, and amount of transportation from original axis were measured at 1, 2, 3, 4, 5, 6, 7 and 8 mm from apex. Instrumentation time, instrument deformation and fracture were recorded. Data were analyzed by means of one-way ANOVA followed by Scheffe's test. The results were as follows 1. Regardless of rotational speed, at the $1{\sim}2mm$ from the apex, axis of canal was transported to outer side of a curvature, and at 3~6 mm from the apex, to inner side of a curvature. Amounts of transportation from original axis were not sienifcantly different among experimental groups except at 5 and 6 mm from the apex. 2. Instrumentation time of 350 and 400 rpm was significantly less than that of 250 and 300 rpm (p<0.01). In conclusion the rotational speed of $ProTaper^{TM}$ files in the range of $250{\sim}400rpm$ does not affect the change of canal configuration, and high rotational speed reduces the instrumentation time. However appearance of separation and distortion of Ni-Ti rotary files can occur in high rotational speed.

• Journal of the korean academy of Pediatric Dentistry
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• v.43 no.4
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• pp.365-373
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• 2016

Composites are the most useful restorative material. However, composites have some disadvantages such as polymerization shrinkage, long working time, and susceptibility to water and contamination, which are stood out more especially when treating children. To solve these problems, bulk-fill composites have been developed. The aim of this study is to compare mechanical properties of bulk-fill and conventional composites. Bulk-fill composites (SureFil SDR flow (SDR), Tetric N-Ceram bulk fill (TBF)) and conventional composites (Filtek Z-350 (Z-350), Unifil Flow (UF), Unifil Loflo Plus (UL)) were used. The Vickers hardness tester was used to measure the microhardness of materials, and Fourier transform infrared spectroscopy was used to measure the degree of conversion. Polymerization shrinkage was measured by using a linometer. Flexural and compressive properties were measured by using the universal testing machine. Data were statistically analyzed by ANOVA and Scheffe's post hoc test. The level of significance was set to p < 0.05. Most conventional composites showed higher microhardness than bulk-fill composites. However, bulk-fill composites showed a higher top/bottom microhardness ratio than conventional composites. Bulk-fill composites showed a higher top/bottom degree of conversion ratio than conventional composites. The polymerization shrinkage was highest in UL and lowest in Z-350. The polymerization shrinkage of flowable composites was higher than that of non flowable composites. The compressive properties were highest in Z-350 and lowest in SDR and UL. In terms of flexural properties, Z-350 was the highest. However, none of the bulk-fill composites exhibited mechanical properties as good as those of conventional composites. Nonetheless, the ratio of microhardness and degree of conversion, which are important properties of bulk filling, were higher in bulk-fill composites. Therefore, the bulk-fill composites might be considered suitable restorative materials in pediatric dentistry.