• The Transactions of the Korean Institute of Power Electronics
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• v.3 no.4
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• pp.418-425
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• 1998

In this paper. determination method of turn-off angle in the SRM drives is proposed to maintain the high torque at a any turn-on angle, which is realized by using selHuning control method, During the sampling time. a number of P pulses from encoder are checked by using one-chip microprocessor. and compared with pre-checked a number of pulses A After calculating difference between two data, the turn-off angle moves forward or backward direction by the self-tuning m method, As repeating such process, the optimal turn-off angle is determined and the maximum torque is maintained T Though experiments, it is observed that motor speed is almost maintained if turn-off angle is adjusted automatically by s selHuning method when turn-ηn angle is changed.

• Korean Journal of Health Education and Promotion
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• v.29 no.1
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• pp.39-57
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• 2012

Objectives: This study was to measure community capacity using individual-level and organizational-level capacity indicators and illuminated the relationship of community capacity and self-rated health status in two regions in Seoul, Korea. Methods: The data from individual surveys were obtained by quota sampling the residents of two autonomous gu in Seoul (N=1,000). The data from organizational surveys were obtained by snowball sampling lists of organizations in the possession of gu offices with a sampling frame (N=153). The survey tools were 6 indicators regarding residents' social capital and a sense of community and 5 indicators regarding community-based organizations and their networks. The analysis methods consisted of the effect of the components of capacity on health status and social network analysis. Results: As for capacity on individual levels, while D-gu was mainly developed inn individual capacity in terms of social interaction, Y-gu was stronger in a sense of community and cohesion among residents. As for capacity on organizational levels, Y-gu was more developed than was D-gu in associational networks. Conclusion: It is necessary to develop health promotion program per community and to strengthen partnerships with and among grassroots organizations based in local communities through the measurement of community capacity.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.14 no.12
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• pp.4795-4815
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• 2020

Drone detection can be considered as a specific sort of small object detection, which has always been a challenge because of its small size and few features. For improving the detection rate of drones, we design a Deeper SSD network, which uses large-scale input image and deeper convolutional network to obtain more features that benefit small object classification. At the same time, in order to improve object classification performance, we implemented the up-sampling modules to increase the number of features for the low-level feature map. In addition, in order to improve object location performance, we adopted the down-sampling modules so that the context information can be used by the high-level feature map directly. Our proposed Deeper SSD and its variants are successfully applied to the self-designed drone datasets. Our experiments demonstrate the effectiveness of the Deeper SSD and its variants, which are useful to small drone's detection and recognition. These proposed methods can also detect small and large objects simultaneously.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.5
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• pp.318-329
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• 2017

This study examined the physical self-concept and self-efficacy of undergraduates. Using the convenience sampling method of non-provability sampling, a total of 377 undergraduates from North Kyongsang Province G city were selected. Of the 377 completed questionnairescollected, a total of 354 surveys with structural equation modeling were analyzed using theSPSS 22.0 statistics program. The self-esteem, endurance, health, and flexibility factors have positive effects on improvingthe self-control efficacy factor of self-efficacy in the order of physical self-concept factors. On the other hand,the higher university students perceive that among the physical self-concepts, the physical activity factor had more negative effects on the self-regulated efficacy. The self-esteem, health, and muscle strength have positive effects on improvingthe confidence factor of self-efficacy in the order of physical self-concept factors. The more perceptive endurance than the appearance, sports competence, body fat, health, self-esteem, flexibility, muscle strength of physical self-concept, and the more influence on self-efficacy. Overall, the higher the perception of physical activity factors among the physical self-concept factors, the more negative effects on the task difficult preference.

• Journal of the Korean Mathematical Society
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• v.53 no.5
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• pp.969-990
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• 2016

We derive a sampling theorem associated with first order self-adjoint eigenvalue problem with a finite rank perturbation. The class of the sampled integral transforms is of finite Fourier type where the kernel has an additional perturbation.

• Journal of the Korean Home Economics Association
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• v.35 no.6
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• pp.143-155
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• 1997

The purpose of this study is to compare the differences of clothing behavior by the level of self-monitoring under given social situations. The result of this study is drown from the analysis of the survey, gathered from the 522 female students of universities reside in Seoul, by using the method of convenience sampling. The statistical methods used to test the data were MANOVA and chi-square test. The results of this study can be summarized s follows; first, as a result of analyzing the differences of situational self-image pursuits among situations depending individual's self-monitoring levels, it was found that the pursuits changes among situations regardless of the self-monitoring levels. Thus, this hypothesis could not be verified. Second, as a result of analyzing the changes of priority of clothing selection factors among situations depending on individual's self-monitoring levels, it was found that the priority factors changed among situations regardless of the self-monitoring levels.

• Child Health Nursing Research
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• v.23 no.1
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• pp.111-116
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• 2017

Purpose: This study was done to examine whether depression, self-esteem, and social support influence suicidal ideation among college students. Methods: Using a correlation study design, participants were recruited from two universities selected by convenience sampling. Data were collected from June 1, to August 31, 2014 from the 206 participants included in the study. The data were analyzed using SPSS / Win 18.0. Results: There was a significant correlation between depression, self esteem, social support, and suicidal ideation. Suicidal ideation was negatively correlated with self-esteem (r=-.64, p<.001) and social support (r=-.45, p<.001), while, suicidal ideation showed a positive correlation with depression (r=.69, p<.001). The significant predictors related to suicidal ideation were depression, self-esteem, and social support. Conclusion: Findings indicate that sensitively assessing depression in college students and efforts to reduce depression can reduce the risk of suicide. Self-esteem and social support of college students are also important resources for suicide prevention.

• Journal of Technologic Dentistry
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• v.25 no.1
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• pp.187-201
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• 2003

The purpose of this study was to investigate the relationship of empowerment, self-efficacy and turnover intention of dental technicians. The subjects of this study were selected by haphazard sampling and the size was 142 of the dental technician. The results were analyzed with spss/pc+ and the conclusion is as follows ; 1. The mean of dental technicians empowerment was 3.24, Self-efficacy was 3.51, and their turnover intention was 2.72. 2. In characteristics of subjects, turnover experience and position are significantly different in empowerment. 3. In characteristics of subjects, a working experience, income, position, marriage and turnover experience are significantly different in self-efficacy. 4. In characteristics of subjects, a position and a working experience are significantly different in turnover intention. 5. Empowerment showed a positive correlation with self-efficacy and a negative correlation with turnover intention. The above results is different from other empowerment studys which empowerment is related with self-efficacy and turnover intention. The study on empowerment is important in the aspect of stratege for increasement of work performance.

• Korean Journal of Human Ecology
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• v.17 no.5
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• pp.927-938
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• 2008

The purpose of this study was to classify self-efficacy typology and analyze the relationship between self-efficacy and consumption value of college students as consumers. Data were gathered by surveying college students living in Daegu and Kyungbook area using convenient sampling. 513 questionnaires were used in the statistical analysis. Data were analyzed by frequency, factor analysis, cluster analysis, correlation analysis, ANOVA, and Duncan-test. The findings are as follows. The self-efficacy typologies of college students were classified into three groups such as challenging confident accomplish oriented, stable uncertain accomplish oriented, and stable accomplish oriented. In the relationship of the self-efficacy was related to the sub-variables of consumption value. The self-efficacy oriented group showed different all the sub-variables of consumption value factors.

• The Journal of Asian Finance, Economics and Business
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• v.7 no.12
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• pp.139-146
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• 2020

The domain of entrepreneurship has been dotted across various paradigms. Identifying and examining entrepreneurial intention and propensity to it spontaneously require the insight from the lens of psychological approach. The aim of this study is to examine the influence and impact of psychological factors on entrepreneurial intention; as it is found that in Bangladeshi context several entrepreneurship studies are undertaken, still the exploratory research on interplay between the psychological factors (i.e., self-confidence, locus of control, need for achievement, and tolerance for ambiguity) and entrepreneurial intention has been merely found. The study has chosen Bangladeshi university students as the unit of analysis and the ultimate sample size in this research is n=265. The current paper is a quantitative study where sampling method is followed by convenience sampling technique, and study data is collected through survey questionnaire. Data has been compiled into SPSS whereas, for hypotheses assessment, Smart PLS software is applied. The results reflect that self-confidence, locus of control, and need for achievement are revealed as contributory determinants of entrepreneurial intention while tolerance for ambiguity is found as an insignificant predictor. The current research is expected to offer an in-depth understanding about the significance of psychological factors in examining entrepreneurial intention.