• Nuclear Engineering and Technology
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• v.26 no.3
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• pp.381-388
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• 1994

Recently, the American National Standards Institute (ANSI) had made some changes in the radiation sources specified from those in the original performance test criteria ANSI N13. 11-1983. In case or beta category, in addition to the high-energy $^{90}$ Sr/$^{90}$ Y beta source, the $^{204}$ Tl source was added because many workplaces have significant levels of lower energy betas. In this study, the performance or the Teledyne PB-3 personnel dosimetry system in the fields of $^{204}$ Tl and $^{90}$ Sr/ $^{90}$ Y beta was investigated using the PTB beta secondary standard sources. The new beta correction function of PB-3 personnel dosimetry system for $^{204}$ Tl beta was also developed in this response experiment. The results show that the Teledyne PB-3 personnel dosimetry system is very effective for $^{90}$ Sr/ $^{90}$ Y beta dose assessment. In case of $^{204}$ Tl beta radiation, however, the results of simple performance test indicated that the use of beta correction factor(=2.088) which was recommanded by manufacturer may result in unexpectable overestimation of delivered dose by about 60%, while the use of developed beta correction function could measure the delivered doses in errors of 15%.

• Journal of Korean Society of Steel Construction
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• v.16 no.3 s.70
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• pp.315-324
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• 2004

This study performs a yield line analysis of welded T-joints in cold-formed Square Hollow Sections (SHS) with the branch in axial compression. The existing yield line models proposed by Koto, Packer, Zhao, and CIDECT and the proposed yield line model of the previous study are compared, using the existing test results of welded T-joints in cold-formed SHS. The yield line model suggested in the previous paper, which is based on the simplified yield line analysis, is reviewed to evaluate its application limit on cold-formed SHS T-joints. In the proposed model, the round corner of the cold-formed SHS section and weld size are taken into account. Finally, the validity range of yield line analysis is determined by observing the actual failure modes and comparing the test value with the analysis value, set as ${\beta}^{\prime}{\leq}0.8$ where ${\beta}^{\prime}=0.8$, ${\beta}^{\prime}=b_1^{\prime}/b_0^{\prime}$, $b_1{^{\prime}}=b_1+t_0$ and $b_0{^{\prime}}=b_0-t_0$.

• Journal of Families and Better Life
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• v.25 no.2 s.86
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• pp.13-21
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• 2007

This study investigates the effect of related variables (types of job, term of employment, working time, job satisfaction, payment satisfaction and, working stress) on the sense of hopelessness felt by married males. The study was conducted on 237 male employees residing in Busan, and measurement devices for study were job-related variables, working stress and hopelessness scale. The study used SPSS 12.0 program to analyze data, and conducted item analysis and reliability test for measure establishment. Average, Standard deviation, one-way ANOVA, scheffe-test, Pearson correlation, and path analysis through regression analysis were conducted pertaining to research subject. The result of this study is as follows; First, working stress has significant difference upon types or working, term of employment and job satisfaction. Office workers relatively have longer term of employment and workers who are less satisfied with job suffer from more working stress. Second, hopelessness has significant difference upon term of employment, job satisfaction and payment satisfaction among job-related variables. Thus, hopelessness is relatively less when term of employment is shorter and job satisfaction and payment satisfaction is higher. Third, variables which affect directly to working stress and hopelessness are term of employment $(\beta=.245)$, payment satisfaction $(\beta=-.182)$ and working stress $(\beta=.189)$, and types of job, term of employment and job satisfaction influences hopelessness indirectly through working stress. In conclusion, workers are more negative when term of employment is longer, payment satisfaction is less and working stress is higher. Moreover, longer term of employment and less job satisfaction contribute to higher working stress and eventually influence hopelessness. Term of employment affects the most to hopelessness $(\beta=.274)$, and it is followed by working stress $(\beta=.189)$ and payment satisfaction $(\beta=-.182)$.

• Journal of Digital Convergence
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• v.10 no.1
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• pp.385-389
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• 2012

This study was performed to determine the effect of patients with colon polypectomy on health behavior practices. Data were surveyed using interview and questionnaires by 112 patients with colon polypectomy in a general hospital who were located in Seoul from December 6, 2010 to January 31, 2011. Data were evaluated with t-test, ANOVA, Pearson correlation coefficient, and Stepwise multiple regression. The results were as follows: First, the higher control of life habit was, the more positive attitude(r=.350, p<.01) and the less inconvenience was significant correlation(r=-.263, p<.05). Secondly, in the stepwise multiple regression analysis, the most important factors influencing health behavior practices were control of life habit(${\beta}$=.392, p=.000), and then inconvenience of life(${\beta}$=-.265, p=.007), weight gain(${\beta}$=-.248, p=.024). In conclusion, positive attitude and control of life habit are necessary to improve the health behavior of patient with colon polypectomy.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.1
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• pp.199-207
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• 2018

The purpose of this study was to examine the mediating effects of resiliency on the relationship between smartphone addiction and subjective happiness among university students. Participants included 570 students attending universities in Seoul, Gyeonggi, and Chungnam areas using self-report questionnaires. Data was analyzed with SPS 23.0 using descriptive statistics, Pearson's correlation coefficient, hierarchical multiple regression, and Sobel test with SPSS 23.0. The study results were as follows: first, as smartphone addiction increased, subjective happiness decreased (${\beta}=-.17$, p<.001). Second, as smartphone addiction increased, resiliency decreased (${\beta}=-.24$, p<.001). Third, as resilience increased, subjective happiness increased (${\beta}=.36$, p<.001). Fourth, resiliency partially mediated the relationship between smartphone addiction and subjective happiness (Z=-4.645, p<.001), and explained 16% of the variance. Findings show that resiliency can play a role in improving subjective happiness of university students. Finally, the implications and limitations of findings were discussed based on the results.

• The Korean Journal of Physiology and Pharmacology
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• v.21 no.1
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• pp.55-64
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• 2017

Progressive memory impairment such as that associated with depression, stroke, and Alzheimer's disease (AD) can interfere with daily life. In particular, AD, which is a progressive neurodegenerative disorder, prominently features a memory and learning impairment that is related to changes in acetylcholine and abnormal ${\beta}$-amyloid ($A{\beta}$) deposition in the brain. In the present study, we investigated the effects of dehydroevodiamine HCl (DHED) on cognitive improvement and the related mechanism in memory-impaired rat models, namely, a scopolamine-induced amnesia model and a $A{\beta}_{1-42}$-infused model. The cognitive effects of DHED were measured using a water maze test and a passive avoidance test in the memory-impaired rat models. The results demonstrate that DHED (10 mg/kg, p.o.) and Donepezil (1 mg/kg, p.o.) ameliorated the spatial memory impairment in the scopolamine-induced amnestic rats. Moreover, DHED significantly improved learning and memory in the $A{\beta}_{1-42}$-infused rat model. Furthermore, the mechanism of these behavioral effects of DHED was investigated using a cell viability assay, reactive oxygen species (ROS) measurement, and intracellular calcium measurement in primary cortical neurons. DHED reduced neurotoxicity and the production of $A{\beta}$-induced ROS in primary cortical neurons. In addition, similar to the effect of MK801, DHED decreased intracellular calcium levels in primary cortical neurons. Our results suggest that DHED has strong protective effects against cognitive impairments through its antioxidant activity and inhibition of neurotoxicity and intracellular calcium. Thus, DHED may be an important therapeutic agent for memory-impaired symptoms.

• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.280-291
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• 2015

This study was done to identify the influence of ego-resilience, emotional intelligence and stress coping strategies on college adjustment in nursing students. The subjects consisted of 158 freshmen & sophomores attending three nursing colleges. The data were collected from October 27 to November 7, 2014, using self-report questionnaires. The data were analyzed using t-test, ANOVA, Pearson correlation and multiple regression with SPSS/WIN 21.0 program. A positive correlation was found for college adjustment with ego-resilience, emotional intelligence, stress coping strategies. In addition emotional intelligence, ego-resilience, school record, satisfaction with nursing major, personal relations, gender accounted for 53.9% of variance in college adjustment. The strongest predictor of college adjustment was emotional intelligence. The findings suggest that development of emotional intelligence and ego-resilience in nursing students is important to college adjustment. It is necessary to develop systematic management of the program to integrate the educational curriculum and extra-curricular activities.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.19 no.4
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• pp.511-518
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• 2012

Purpose: This study was done to identify the relationship of family function, self-efficacy and self-leadership, and to identify factors affecting self-leadership in adolescents. Method: Sampling was done using a convenience sampling method and 779 adolescents were recruited between June 4 and 15, 2012. Data were collected using self-report questionnaires which included general characteristics, family function, self-efficacy and self-leadership. Data were analyzed using descriptive, t-test, one way ANOVA, Scheffe test, Pearson correlation coefficient, and stepwise regression analysis with SPSS/WIN 19.0. Results: The major findings of this study were as follow; 1) There were significant relationships between self-leadership and family function (r=.36, p<.001), and self-efficacy (r=.51, p<.001). 2) Self-leadership was significantly associated with self-efficacy (${\beta}$=.42, p<.001), family function (${\beta}$=.20, p<.001), satisfactory relationships with teachers (${\beta}$=.12, p<.001), experience as a leader (${\beta}$=.10, p=.001), higher school records (${\beta}$=.17, p<.001), and medium school records (${\beta}$=.11, p=.001). These variables explained 40.4% of variance in adolescents' self-leadership. Conclusion: The results of this study indicate that there is a relationship between family function, self-efficacy and self-leadership in adolescents and that in developing intervention programs to promote self-leadership, in adolescents, these variables should be considered.

• Journal of the Korea Convergence Society
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• v.9 no.6
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• pp.241-250
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• 2018

The purpose of this study was to determine factors affecting the suicidal ideation in spouse caregivers of the elderly with dementia Living in the Community. The data were collected from 160 spouses of elderly people with dementia who use dementia support centers and long-term care service in seoul. Data were collected with structured questionnaires to investigate the general characteristics and suicidal ideation-related factors, and analyzed using t-test, ANOVA, Pearson's correlation coefficient, Multiple regression analysis with SPSS win version 24.0 program. The significant factors affecting suicidal ideation were entrapment(${\beta}=.452$), SDAP(${\beta}=.273$), coping strategies(${\beta}=-.199$), it were explained 55.7%(F=19.199, p<.001). Therefore, counseling and education should be provided to help reduce the entrapment and enhance coping strategy with the dementia condition of the elderly with dementia. Measures also need to be made to improve the accessibility of a spouse with dementia that are left neglected.

• Culinary science and hospitality research
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• v.22 no.5
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• pp.82-94
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• 2016

This study on CRM oftKorean restaurant guests to test the emotional response and behavioral intention. Three kinds of variables(service quality, information quality, system quality) from Korean restaurant guests were set to test the CRM. Results of the multiple regression analysis revealed a positive significant relationship with respect to quality of service, quality information, and quality system with all customer emtional reaction. Second, the results also found that the three independent variables of quality of service (${\beta}=.104$, P<.01), information quality (${\beta}=.215$, P<.001), and system quality (${\beta}=.682$, P<001) had a significant positive effect on the dependent variable for customer behavior (+). Third, CRM quality of service, quality information, and quality of the restaurant system are shown to influence the behavior and it also showed that both the part-mediated effects.