• Biomedical Science Letters
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• v.24 no.4
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• pp.418-425
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• 2018

Amyloid brain positron emission tomography (PET) images are visually and subjectively analyzed by the physician with a lot of time and effort to determine the ${\beta}$-Amyloid ($A{\beta}$) deposition. We designed a convolutional neural network (CNN) model that predicts the $A{\beta}$-positive and $A{\beta}$-negative status. We performed 18F-florbetaben (FBB) brain PET on controls and patients (n=176) with mild cognitive impairment and Alzheimer's Disease (AD). We classified brain PET images visually as per the on the brain amyloid plaque load score. We designed the visual geometry group (VGG16) model for the visual assessment of slice-based samples. To evaluate only the gray matter and not the white matter, gray matter masking (GMM) was applied to the slice-based standard samples. All the performance metrics were higher with GMM than without GMM (accuracy 92.39 vs. 89.60, sensitivity 87.93 vs. 85.76, and specificity 98.94 vs. 95.32). For the patient-based standard, all the performance metrics were almost the same (accuracy 89.78 vs. 89.21), lower (sensitivity 93.97 vs. 99.14), and higher (specificity 81.67 vs. 70.00). The area under curve with the VGG16 model that observed the gray matter region only was slightly higher than the model that observed the whole brain for both slice-based and patient-based decision processes. Amyloid brain PET images can be appropriately analyzed using the CNN model for predicting the $A{\beta}$-positive and $A{\beta}$-negative status.

• Journal of applied mathematics & informatics
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• v.24 no.1_2
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• pp.437-448
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• 2007

Suppose K is a nonempty closed convex nonexpansive retract of a real uniformly convex Banach space E with P as a nonexpansive retraction. Let $T_1,\;T_2\;and\;T_3\;:\;K{\rightarrow}E$ be nonexpansive mappings with nonempty common fixed points set. Let $\{\alpha_n\},\;\{\beta_n\},\;\{\gamma_n\},\;\{\alpha'_n\},\;\{\beta'_n\},\;\{\gamma'_n\},\;\{\alpha'_n\},\;\{\beta'_n\}\;and\;\{\gamma'_n\}$ be real sequences in [0, 1] such that ${\alpha}_n+{\beta}_n+{\gamma}_n={\alpha}'_n+{\beta'_n+\gamma}'_n={\alpha}'_n+{\beta}'_n+{\gamma}'_n=1$, starting from arbitrary $x_1{\in}K$, define the sequence $\{x_n\}$ by $$\{zn=P({\alpha}'_nT_1x_n+{\beta}'_nx_n+{\gamma}'_nw_n)\;yn=P({\alpha}'_nT_2z_n+{\beta}'_nx_n+{\gamma}'_nv_n)\;x_{n+1}=P({\alpha}_nT_3y_n+{\beta}_nx_n+{\gamma}_nu_n)$$ with the restrictions $\sum^\infty_{n=1}{\gamma}_n<\infty,\;\sum^\infty_{n=1}{\gamma}'_n<\infty,\; \sum^\infty_{n=1}{\gamma}'_n<\infty$. (i) If the dual $E^*$ of E has the Kadec-Klee property, then weak convergence of a $\{x_n\}$ to some $x^*{\in}F(T_1){\cap}{F}(T_2){\cap}(T_3)$ is proved; (ii) If $T_1,\;T_2\;and\;T_3$ satisfy condition(A'), then strong convergence of $\{x_n\}$ to some $x^*{\in}F(T_1){\cap}{F}(T_2){\cap}(T_3)$ is obtained.

• Journal of the Korea Convergence Society
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• v.9 no.1
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• pp.31-39
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• 2018

This is a convergence study to investigate the factors affecting the physical health status of college students and to present a strategy for effective program development. The participants of this study were 200 college students in a region and collected data by self-reported questionnaire. Data were analyzed by descriptive statistics, t-test, ANOVA, correlation analysis and stepwise multiple regression analysis. The results were as follows: 1) The physical-health status of the college students was positively correlated with the subjective perception of health status(${\beta}=-.323$, p<.01), health awareness(${\beta}=-.278$, p<.01), gender(${\beta}=-.197$, p<.01), and breakfast habit(${\beta}=-.192$, p<.01). And the explanatory power($R_2$) by 4 variables was 33.1%. As a result, it was confirmed that strengthening subjective perception, positive reinforcement of health awareness, and habit of breakfast were important for improvement of physical health status. Therefore, it is necessary to develop a health promotion program based on the factors influencing on the physical health status and to analyze its application effect.

• Journal of the Korea Convergence Society
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• v.10 no.9
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• pp.311-321
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• 2019

A Convergence study was conducted to investigate the factors influencing the burnout in caregivers and to present a strategy for effective program development. The subjects of this study were 185 caregivers who had worked for 6 months in a G city Nursing facility and distributed the self-reported questionnaire in September 2015. Data were analyzed using t-test, one-way ANOVA, $Scheff{\acute{e}}$ test, Pearson's correlation coefficient and Stepwise multiple regression analysis were performed. According to the results, the identified influencing factors were stress of personal role and daily work factors(${\beta}=.307$, p<.001), stress of relationship with supervisors(${\beta}=.186$, p<.021), confidence(${\beta}=.182$, p<.005), passive coping(${\beta}=.140$, p<.035) with burnout in caregivers. The explanatory power($R^2$) by 4 variables was 27.5%. Based on the results of this study, it would be necessary to develop an burnout reduction program that can reduce stress, increase self-confidence, and diversify coping strategies in order to reduce burnout of caregivers.

• Journal of Digital Convergence
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• v.13 no.4
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• pp.271-281
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• 2015

The purpose of this study was to explore convergence on the theory of unpleasant symptom, and factors affecting quality of life of liver cirrhosis patients. A total of 198 liver cirrhosis patients were recruited symptom experiences, physiologic factors, psychological factors, situational factors, and quality of life. Data were collected from March, to May, 2014 and analyzed using one-way ANOVA, Pearson correlations, multiple regressions analysis with PASW (SPSS) 21.0. Variables such as duration of liver cirrhosis(${\beta}=.19$, p<.001), symptom experiences(${\beta}=.19$, p=.032), physical(${\beta}=.15$, p=.008), psychological(${\beta}=.39$, p<.001) and situational factors(${\beta}=.32$, p<.001) explained 51.8% of variance in quality of life(F=15.57, p<.001). The symptom experiences, physiological, psychological and situational factors should be considered for caring liver cirrhosis patients. Symptoms of postmyocardial infarction (post-MI) patients at risk for progression to heart.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.323-332
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• 2017

This study is convergence study of path model for the relationship among self esteem(SE), critical thinking disposition(CTD), problem solving skills(PSS) and motivation toward learning(MTL). The survey was performed on 207 nursing students in one college. Data was collected using a structured questionnaires and analysed with PASW 18.0 and AMOS 18.0. Model fit indices were in good agreement with recommended level(${\chi}^2/df=2.128$, GFI=.995, AGFI=.949, RMSEA=.074, CFI=.993, NFI=.988). Based on the path model, SE(${\beta}=.205$), PSS(${\beta}=.420$) showed a direct effect on MTL while CTD(${\beta}=.182$) showed a indirect effect on MTL. The SE showed a direct effect on CTD(${\beta}=.398$) and CTD(${\beta}=.433$) showed a direct effect on PSS. The findings indicate the necessity of developing educational programs to enhance nursing student's SE for increasing of MTL.

• Journal of the Korea Convergence Society
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• v.9 no.5
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• pp.99-104
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• 2018

The purpose of this study was to investigate the convergence factors affecting professional identity perceived by the emotional labor of clinical practice and self-esteem in some dental hygiene students. The questionnaire was conducted in 205 dental hygiene students from 3 university in Jeollanam-do area. The data were analyzed using SPSS 12.0. Professional identity correlated positively with self-esteem(r=0.366, p<0.01), negatively with emotional labor of clinical practice(r=-0.213, p<0.01). The convergence factors influencing professional identity were satisfaction level with majors(${\beta}=0.434$), self-esteem(${\beta}=0.236$) and emotional labor of clinical practice(${\beta}=-0.199$). The regression model explained 34.6% of professional identity. Therefore, to enhance professional identity in dental hygiene students, it is required to program development to improve satisfaction level of with majors, self-esteem and management of emotional labor of clinical practice.

• Environmental and Resource Economics Review
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• v.28 no.1
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• pp.1-37
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• 2019

This study investigates the convergence in per capita $CO_2$ emission by income group for an unbalanced panel of 152 countries from 1980 to 2013 using beta and sigma convergence model. Absolute beta and sigma convergence differed by $CO_2$ emission reduction policies in each countries. Conditional beta convergence shows that per capita income has a negative effect on growth in per capita $CO_2$ emission. In particular, better-quality institutions and technology accelerated the negative effect of per capita income on the speed of convergence of per capita $CO_2$ emission in high-income countries. For middle-income countries, the growth of income affected the convergence of $CO_2$ emission per capita, but institutional quality has an insignificant impact. On the other hand, improvements in the level of technology have a mitigating effect on the negative impact of income in middle-income and low-income countries, contributing to the increase in $CO_2$ emission.

• Journal of the Korea Convergence Society
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• v.8 no.10
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• pp.115-124
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• 2017

The purpose of the study was to investigate the convergence factors to posttraumatic growth(PTG) in survivors with female urogenital neoplasm survivors. A self-reported questionnaire was completed by 141 female urogenital neoplasm survivors via e-mail from September to October, 2016. The questionnaire consisted of PTG inventory, illness intrusiveness rating scale, cancer coping, family cohesion evaluation scale, and medical outcomes study social support survey. The data were analyzed by ANOVA, Pearson-correlation coefficient, and multiple regression analysis. Total score of PTG was 84.13points and statistically significant according to age, religion, marital status and positively associated with coping, family cohesion and social support. Results of the regression analysis showed religion(${\beta}=.127$), marital status(${\beta}=.081$), coping(${\beta}=.232$) and family cohesion(${\beta}=.415$), it were explained 44.7%. This study indicates that it is important to understand general characteristics of personal. And a convergent approach is needed to promote PTG by hospital and community.

• Journal of the Korea Convergence Society
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• v.8 no.5
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• pp.265-273
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• 2017

This study is convergence study to identify the relationships among attitude toward death(ATD), spiritual well-being(SW) and awareness about organ donation(AAOD). The survey was performed on 214 nursing students in one university. Data was collected using a structured questionnaires and analysed with PASW 20.0. Study findings revealed that AAOD has a significant correlation with ATD and SW. ATD(${\beta}=-.159$), SW(${\beta}=.132$), idea about brain death's organ donation(${\beta}=.314$), and major satisfaction(${\beta}=.134$) about AAOD were most significant predictive variables. These variables accounted for 20.5% of the variance in AAOD. The findings indicate the necessity of developing educational programs to enhance nursing students's ATD and SW for increasing positive AAOD and further rate of organ donation, and follow-up study.