• Journal of radiological science and technology
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• v.39 no.1
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• pp.51-57
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• 2016

Acoustic noise during magnetic resonance imaging (MRI) is the main source for patient discomfort. we report our preliminary experience with this technique in neuroimaging with regard to subjective and objective noise levels and image quality. 60 patients(29 males, 31 females, average age of 60.1) underwent routine brain MRI with 3.0 Tesla (MAGNETOM Tim Trio; Siemens, Germany) system and 12-channel head coil. Q-$T_2$ and $T_2$ sequence were performed. Measurement of sound pressure levels (SPL) and heart rate on Q-$T_2$ and $T_2$ was performed respectively. Quantitative analysis was carried out by measuring the SNR, CNR, and SIR values of Q-$T_2$, $T_2$ and a statistical analysis was performed using independent sample T-test. Qualitative analysis was evaluated by the eyes for the overall quality image of Q-$T_2$ and $T_2$. A 5-point evaluation scale was used, including excellent(5), good(4), fair(3), poor(2), and unacceptable(1). The average noise and peak noise decreased by $15dB_A$ and $10dB_A$ on $T_2$ and Q-$T_2$ test. Also, the average value of heartbeat rate was lower in Q-$T_2$ for 120 seconds in each test, but there was no statistical significance. The quantitative analysis showed that there was no significant difference between CNR and SIR, and there was a significant difference (p<0.05) as SNR had a lower average value on Q-$T_2$. According to the qualitative analysis, the overall quality image of 59 case $T_2$ and Q-$T_2$ was evaluated as excellent at 5 points, and 1 case was evaluated as good at 4 points due to a motion artifact. Q-$T_2$ is a promising technique for acoustic noise reduction and improved patient comfort.

• The Journal of Korean Academy of Prosthodontics
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• v.51 no.2
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• pp.82-89
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• 2013

Purpose: The present study is aimed to evaluate the combined effect of recombinant human bone morphogenetic protein 2 (rhBMP-2) and recombinant human vascular endothelial growth factor (rhVEGF) coated onto anodized implants on osseointeration. Materials and methods: Six New Zealand white rabbit were used in this study. Each animal received 4 implants that were either coated with rhBMP-2 and rhVEGF (Study group) or anodized implant (Control group) in both tibia. This was performed using a randomized split-mouth design. A total 24 implants were used. The implant stability quotient (ISQ) value using resonance frequency analyser and removal torque (RTQ) measurement were investigated at 2 and 8 weeks. The t-test was used for statistical analysis (${\alpha}$=.05). Results: Control and study group showed good osseointegration at 8 weeks. The ISQ and RTQ values of study group were significant compared with the control group at 8 weeks (P<.05). However, No statistical significance was observed at 2 weeks (P>.05). Conclusion: It was concluded that rhBMP-2 with rhVEGF coated onto anodized implants can induce better osseointegration at late healing period.

• Journal of The Korean Association of Information Education
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• v.24 no.2
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• pp.177-188
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• 2020

The purpose of this study was to examine the relationship between techno-stress perceived by elementary school teachers and related variables in a flipped learning environment. To achieve the purpose, the following research question have been established: First, what is the difference between techno-stress perceived by elementary school teachers? Second, what is the difference between techno-stress related variables perceived by elementary school teachers? Third, how do the TPACK, teacher effectiveness, and school environment support, perceived by elementary school teachers, affect technostress? 207 teachers at elementary school responded on a questionnaire to measure their perceived techno-stress, TPACK, teacher efficacy, and school environment support. Data were analyzed with using independent two-sample t-test, one-way ANOVA, and multiple regression analysis. The results were as follows: First, the elementary school teachers working on a leading school perceived higher techno-overload and techno-complexity more than those in ordinary school. Second, the elementary school teachers showed differences in the perception of TPACK, teacher efficacy, and school environment support according to the teacher's career, and leading school. Third, the elementary schools teachers perceived in TK, TCK, TPACK, educational support, and technology have a positive affect with techno-stress. The results are significant in that they provided data for reducing techno-stress of elementary school teachers in a flipped learning environment.

• The Journal of Korean Academy of Sensory Integration
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• v.18 no.1
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• pp.13-22
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• 2020

Objective : This study was conducted to confirm general differences in eating attitudes according to the sensory processing characteristics of women. Methods : The Adolescent/Adult Sensory Profile (AASP) and the Eating Attitude Test (EAT-26) were used to survey 241 women. Their eating attitudes according to the sensory processing characteristics was analyzed using an independent t-test and one-way ANOVA, and the post-analysis was performed using the Scheffe test. Results : Among the sensory processing characteristics, except for eating control due to low registration, binge-eating and foodlessness due to sensory avoidance, all eating attitudes were significantly different according to sensory processing characteristics (p<.05). The anorexic behaviour, binge-eating and foodlessness was shown to be negative in cases of those who had much lower registration than most people. All eating attitudes, such as anorexia, binge-eating and foodlessness, and eating control, were shown to be negative in cases of women whose sensation seeking was equal to or much greater than the general population. The binge-eating and foodlessness were shown to be negative in cases of high sensory sensitivity. The anorexic behaviour was shown to be negative in cases of elevated sensory avoidance. Conclusion : Eating attitudes differed depending on the sensory processing characteristics. As such, sensory integration mediation can be proposed as a method of controlling the eating attitudes of women in general.

• The Journal of Korean Academy of Sensory Integration
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• v.18 no.1
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• pp.1-12
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• 2020

Objective : In this study, we are going to check the impact of the daily performance of a child with developmental disabilities on the parent's burden and quality of life. Methods : 120 parents of children with developmental disabilities were targeted in Chungcheong and Jeolla provinces. To measure the daily performance ability of children with developmental disabilities, we used evaluative Pediatric Evaluation of Disability Inventory and The burden of parents was measured by Family Burden Questionnaire and the quality of life by Beach Center Family Quality of Life Scale. Based on the data collected, independent t-test, one-way anova, Pearson correlation analysis and regression analysis were conducted to check the impact of a child's daily performance ability of developmental disability on the parent's burden and quality of life. Results : The daily performance ability of a children with developmental disabilities showed a negative correlation with the burden of the parents and a positive correlation with the quality of life. The hygiene and bowel & bladder control of children with developmental disabilities had an important influence on parent's burden, while hygiene, toileting, and bowel & bladder control of children with developmental disabilities had a significant effect on their parent's quality of life. Conclusion : It has been shown that the daily performance ability of a children with developmental disabilities has a major influence on parent's burden and quality of life. In order to reduce the burden and improve quality of life, therapeutic intervention, education and interview programs for daily life of children with developmental disabilities need to be carried out systematically by occupational therapists.

• The Journal of Korean society of community based occupational therapy
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• v.9 no.3
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• pp.1-9
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• 2019

Objective : The purpose of this study was to verify the effect of sleep quality on activity participation in the elderly living in the community. Methods : This study was conducted on 200 elderly people using welfare institutions located in Jeollabuk-do from August 21 to September 29, 2019. Data collection was performed using the Korean version of the Pittsburgh Sleep Quality Index (PSQI-K) and the Korean-Activity Card Sort (K-ACS). The data were analyzed by descriptive statistics, independent t-test, Pearson correlation, and simple linear regression analysis. Results : The group with high quality of sleep showed significantly higher participation in instrumental activities, social activities and leisure activities than the group with low quality of sleep (p<.001). The quality of sleep was significantly correlated with instrumental activities, social activities and leisure activities (p<.01). The quality of sleep significantly affected the instrumental activities (R²=.224), social activities (R²=.142) and leisure activities (R²=.227) (p<.001). Conclusion : The quality of sleep needs to be approaches to promote the participation of elderly people living in the community, and development of an intervention program will be needed to improve quality of sleep.

• Journal of the Korean Society for Library and Information Science
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• v.46 no.2
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• pp.245-260
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• 2012

This study aims to analyze the change in the correlation between the index values and qualitative quantitative evaluation elements by applying 'the decile of total number of articles' instead of the average annual number of articles in Kor-Factor2, and to evaluate the distinction ability between registered journals and register nominee journals of the KCI. The correlation between the index values and qualitative quantitative evaluation elements was analyzed by calculating the correlation coefficient between the index values and the evaluation elements, and then the correlation was compared with that of Kor-Factor2. To evaluate the distinction ability, we carried out independent samples t-test on the mean difference between index values of register nominee journal group and registered journal group and compared the mean difference with that of Kor-Factor2, IF and journal h-index. As a result, we found that the modified index applying the decile of total number of articles was effective in improving the balance among the correlation between the index values and qualitative quantitative evaluation elements compared to Kor-Factor2, and the new index appeared to be superior to other indexes on distinction ability of the journal's registration condition in the KCI.

• School Mathematics
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• v.19 no.1
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• pp.137-151
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• 2017

This study aims to investigate the possibility of elementary students' generalization from three-digit numbers to multi-digit numbers in principles for addition and subtraction. One of main changes was the reduction of range of numbers for addition and subtraction from four-digit to three-digit. It was hypothesized that the students could generalize the principles of addition and subtraction after learning the three-digit addition and subtraction. To achieve the purpose of this study, we selected two groups as a sampling. One is called 'group 2015' who learned four-digit addition and subtraction and the other is called 'group 2016' who learned addition and subtraction only to three-digit. Because of the particularity of these subjects, this study covered two years 2015~2016. We applied our addition and subtraction test which contains ten three-digit or four-digit addition and subtraction items, respectively. We collected their results of the test and analyzed their differences using t-test. The results showed statistically meaningful difference between the mean score of the two groups only for four-digit subtraction. Based on the result, we discussed and made some didactical suggestions for teaching multi-digit addition and subtraction.

• Journal of Gifted/Talented Education
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• v.21 no.3
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• pp.611-630
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• 2011

The purpose of the study was to investigate which psychological factors influence on the gifted students' achievement. As a psychological factor, self-determination, learning goal-orientation, self-efficacy, belief of intelligence, and self-regulated learning strategy were examined. The difference in psychological factors between the gifted with high achievement and the gifted with low achievement was to explored. For the study 128 gifted students' data from second-year data of Korean Education Longitudinal Study (KELS) were selected and analyzed. The findings indicate that the predictors of gifted students' achievement are extrinsic regulation, identified regulation, mastery-approach goal, self-efficacy, elaboration, and meta-cognition factor. Especially, the factor of elaboration and identified regulation are the strongest predictors. The findings from t-test analysis indicate that the gifted with low achievement show the low level in self-determination, mastery-approach, self-efficacy, elaboration, meta-cognition, place management and seeking social assistance from teacher. Therefore the developing elaboration, one of regulation learning strategy, is essential to improve the achievement of the gifted students with low scores.

• Journal of the Korean Society of Radiology
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• v.7 no.5
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• pp.305-311
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• 2013

This study involves an experiment using functional magnetic resonance imaging(fMRI) to delineate brain activation for execution functional performance. Participates to this experiment of the normal adult (man 4, woman 6) of 10 people, is not inserts the metal all closed phobia and 24.5 year-old average ages which the operating surgeon experience which are not they were. The subject for a functional MRI experiment word -color test prosecuting attorney subject rightly at magnetic pole presentation time of 30 first editions and after presenting, uses SPM 99 programs and the image realignment, after executing a standardization (nomalization), a difference which the signal burglar considers the timely order as lattice does, pixel each image will count there probably is, in order to examine rest and active crossroad dividing independence sample t-test (p<.05). Overlapped in this standard anatomic image and got a brain activation image from level of significance 95%. With functional MRI resultant execution function inside being relation, the prefrontal lobe, anterior cingulate gyrus, parietal lobe, orbitofrontal gyrus, temporal lobe, parietal lobe was activated. The execution function promotes a recovery major role from occupational therapy, understanding about the damage mechanism is important. When confirms the brain active area which accomplishes an execution function brain plasticity develops the cognitive therapeutic method which is effective increases usefully very, will be used.