• KSII Transactions on Internet and Information Systems (TIIS)
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• v.16 no.1
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• pp.16-37
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• 2022

Accurate liver segment segmentation based on radiological images is indispensable for the preoperative analysis of liver tumor resection surgery. However, most of the existing segmentation methods are not feasible to be used directly for this task due to the challenge of exact edge prediction with some tiny and slender vessels as its clinical segmentation criterion. To address this problem, we propose a novel deep learning based segmentation model, called Boundary-Aware Dual Attention Liver Segment Segmentation Model (BADA). This model can improve the segmentation accuracy of liver segments with enhancing the edges including the vessels serving as segment boundaries. In our model, the dual gated attention is proposed, which composes of a spatial attention module and a semantic attention module. The spatial attention module enhances the weights of key edge regions by concerning about the salient intensity changes, while the semantic attention amplifies the contribution of filters that can extract more discriminative feature information by weighting the significant convolution channels. Simultaneously, we build a dataset of liver segments including 59 clinic cases with dynamically contrast enhanced MRI(Magnetic Resonance Imaging) of portal vein stage, which annotated by several professional radiologists. Comparing with several state-of-the-art methods and baseline segmentation methods, we achieve the best results on this clinic liver segment segmentation dataset, where Mean Dice, Mean Sensitivity and Mean Positive Predicted Value reach 89.01%, 87.71% and 90.67%, respectively.

• Journal of the Korean Home Economics Association
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• v.42 no.3
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• pp.1-16
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• 2004

This study analyzes the relation of friendship and internet use on adolescents' internet addiction. The subjects were 117 middle and 106 high school adolescents living in Kwang-ju city. Cronbach'a, t-test, x²-test, ANOVA, Duncan's test were employed in analyzing the data by using SPSS 10.0. The results of this study can be summarized as follows: - First of all, most adolescents had a best friend and maintained an affirmative friendship showing high social function and satisfaction. And it was also found that internet use has been settled as a part of daily life among adolescents and over majority of the subjects reported themselves as internet addicts. - Secondly, boys had more friends than girls, but the frequency of interaction with their friends was lower than for girls. Girls showed higher scores in function and satisfaction with friends than boys. And girls used the internet longer than boys. - Thirdly, variables of internet friends and internet use showed significant differences on internet addiction. Groups using the internet frequently, more than usual, and groups using the internet to relax and enjoy showed significantly higher scores in internet addiction.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.10
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• pp.37-45
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• 2018

The purpose of this study was to investigate the impact of a teacher's leadership (initiating and consideration), class climate, and friendship on academic attitudes. In order to accomplish this, 1,533 elementary school students were recruited. Descriptive statistics and path analysis were employed to examine relationships. The major findings of this study are as follows. First, there were positive correlations between academic attitudes and the teacher's leadership, class climate, and friendship. Second, results of path analysis illustrated that a teacher's leadership consideration indicator had a direct impact on class climate, friendship, and academic attitudes. Furthermore, the teacher's leadership consideration indirectly affected academic attitudes through mediation of class climate and friendship. However, the teacher's leadership initiating indicator did not have a direct impact on class climate, friendship, and academic attitude. The indices of the best fit model for these variables were adequate (GFI, NFI, CFI > 0.90). This study shows that the teacher's leadership consideration is the significant predictor for elementary school students' class climate, friendship, and academic attitudes. Finally, the meaning and limitations of this research, and its implications on academic assistance and intervention, are discussed in detail.

• Journal of the Korean Home Economics Association
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• v.42 no.11
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• pp.1-15
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• 2004

This study examined the interaction between children's peer experiences and familial support in relation to their psychosocial adjustment(self-esteem and lonelitness). Peer experiences were examined in terms of children's perceptions of peer acceptance and the reciprocity of best friendship. The subjects were 2754th or 5th graders residing in Seoul. It was found that the interaction between children's perceptions of peer acceptance and familial support, and that between the reciprocity of bort friendship and familial support were both significant predictors of children's loneliness whereas only the former was a significant predictor of children's self-esteem. The study results suggest that children's experiences from one type of interpersonal relationship should be examined in conjunction with their experiences in other types of relationships in order to better understand the psychosocial domains of child development.

• Korean Journal of Child Studies
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• v.18 no.2
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• pp.311-331
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• 1997

This study investigated the relationship between preschool children's social competence and perceived social support. The subjects were 85 children enrolled in 10 kindergartens and nurseries located in Seoul. Social support was assessed by children themselves with a social support dialogue Cask, "My Family and Friends," developed by Reid, Lamdegman, and Jaccard (1989). This task consists of 12 dialogues based on Vygotskian principles. Social competency was assessed by teachers with a slightly modified version of Song's Iowa Social Competency Scale (ISCS). The data were analyzed by frequencies percentiles, mean, one-way ANOVAs, and Pearson's correlations. Results showed that (1) Children perceived parents to be the best multi-purpose social providers: mothers for emotional support and fathers for instrumental support. (2) Children with unemployed mothers perceived higher maternal emotional, informational, and instrumental support than children with employed mothers. (3) Middle-class children perceived higher friendship support than upper-or lower-class children. (4) Friendship support was the one variable most significantly related to children's social competence.

• The Journal of Asian Finance, Economics and Business
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• v.9 no.10
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• pp.159-168
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• 2022

The time series of foreign trade turnover is complex and variable and contains linear and nonlinear information. This paper proposes preprocessing the dataset by the EMD algorithm and combining the linear prediction advantage of the SARIMA model with the nonlinear prediction advantage of the EMD-LSTM model to construct the SARIMA-EMD-LSTM hybrid model by the weight assignment method. The forecast performance of the single models is compared with that of the hybrid models by using MAPE and RMSE metrics. Furthermore, it is confirmed that the weight assignment approach can benefit from the hybrid models. The results show that the SARIMA model can capture the fluctuation pattern of the time series, but it cannot effectively predict the sudden drop in foreign trade turnover caused by special reasons and has the lowest accuracy in long-term forecasting. The EMD-LSTM model successfully resolves the hysteresis phenomenon and has the highest forecast accuracy of all models, with a MAPE of 7.4304%. Therefore, it can be effectively used to forecast the Sino-Russia foreign trade turnover time series post-epidemic. Hybrid models cannot take advantage of SARIMA linear and LSTM nonlinear forecasting, so weight assignment is not the best method to construct hybrid models.

• Journal of Families and Better Life
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• v.1 no.2
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• pp.21-42
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• 1983

This paper aims to present basic data in order to improve the management of apartment house through grasping homemaker's concern about the management of apartment house satisfaction and dissatisfaction with it, and , furthermore, to suggest the best way to enjoy pleasent life of apartment house. The date collected through the questionnaire were analyzed, using the analysis of variance, chi square, and Pearson product moment correlation coefficient. The conclusion of this are as follows: 1) The homemakers are concerned with the management of apartment house, but they seem to dissatisfy with it. 2)The apartment house of the management of self-government contains may factors of dissatisfaction than of commission, expecially in the management of inside facilities. 3)When homemakers in the apartment house of the management of the self-government are very concerned with the management of the area, they are satisfied with. For the management of it's facilities, however, the more they show concerns with it, the less they satisfy with it. But for the case of the management of commission, they are interested in the management of inhabitants and satisfied with it. 4) The homemakers in the apartment house of the self-government are satisfied with the management of the whole if they gave friendship and trust on the manger, and get accustomed the life of the apartment house and enjoy it. While those who have friendship and trust on the manger in the management of commission have concern and satisfaction with the management.

• Korean Security Journal
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• no.6
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• pp.123-146
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• 2003

International sports events are no longer simple sports events. They are kinds of political and diplomatic events which are focused on international interests and they have to be held successfully to achieve their goal. Recently their economic effects have become one of the most important purposes. Almost all countries are doing there best to host international sports events for the purpose of advertising their own countries. But if there are terrorists who are to attack international sports events, the purpose of international sports events to improve friendship between nations and the peace of all mankinds will be seriously damaged. Also host country will be seriously damaged politically, diplomatically and economically. This article examines rapidly increasing international terrorism after 9.11 and analyzes the recent world terrorism situations and furthermore proposes legal and systemic countermeasures of our country to concentrate nation's abilities to prevent these kinds of sports terrorism.

• The Journal of Asian Finance, Economics and Business
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• v.9 no.4
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• pp.83-92
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• 2022

Due to the uncertainty in the order of the integrated model, the SARIMA-LSTM model, SARIMA-SVR model, LSTM-SARIMA model, and SVR-SARIMA model are constructed respectively to determine the best-combined model for forecasting the China-Russia trade turnover. Meanwhile, the effect of the order of the combined models on the prediction results is analyzed. Using indicators such as MAPE and RMSE, we compare and evaluate the predictive effects of different models. The results show that the SARIMA-LSTM model combines the SARIMA model's short-term forecasting advantage with the LSTM model's long-term forecasting advantage, which has the highest forecast accuracy of all models and can accurately predict the trend of China-Russia trade turnover in the post-epidemic period. Furthermore, the SARIMA - LSTM model has a higher forecast accuracy than the LSTM-ARIMA model. Nevertheless, the SARIMA-SVR model's forecast accuracy is lower than the SVR-SARIMA model's. As a result, the combined models' order has no bearing on the predicting outcomes for the China-Russia trade turnover time series.

• Journal of the Korean Home Economics Association
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• v.35 no.5
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• pp.61-72
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• 1997

The purpose of this study was to examine the developmental changes about self-perception from childhood to adult period. The subjects were 365 of 5th graders in elementary school, the 2nd graders in junior and senior high school, sophomore in college, and adults. The instruments used for this study were Harter's Self-Perception Profile for the children, adolescences, college students, and adults. The results were as follows. 1. From elementary school to junior high school, the score of scholastic, athletic, physical appearance, behavioral conduct, and global self-worth were decreased. At the developmental perspective, the junior high school students were highly anxious for self-perception. 2. Physical appearance were the best predictor of the global self-worth for all developmental stages. 3. Physical appearance, behavioral conduct predicted more about the global self-worth than any other factors for elementary and junior high school students. And for junior high school students, social acceptance and friendship also predicted about the global self-worth. Scholastic competence showed higher correlation with global self-worth for the senior high school and college students than elementary and junior high school students. 4. For college students, males had higer scores than females on ability-oriented but also relationship-oriented subscales. But the adults showed no differences in nurturance, household management, job competence depending on sex.