• The Korean Journal of Applied Statistics
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• v.27 no.2
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• pp.277-290
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• 2014

We analyzed binary landslide data from the Boeun area with logistic regression. Since the number of landslide occurrences is only 9 out of 5000 observations, this can be regarded as a rare event data. The main issue of logistic regression with the rare event data is a serious bias problem in regression coefficient estimates. Two bias correction methods were proposed before and we quantitatively compared them via simulation. Firth (1993)'s approach outperformed and provided the most stable results for analyzing the rare-event binary data.

• The KIPS Transactions:PartD
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• v.11D no.7 s.96
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• pp.1451-1458
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• 2004

Current software reliability growth models based on Gompertz growth curve are all logarithmic type. Software reliability growth models based on logarithmic type Gompertz growth curve has difficulties in parameter estimation. Therefore this paper proposes a software reliability growth model based on the logistic type Gompertz growth curie. Its usefulness is empirically verified by analyzing the failure data sets obtained from 13 different software projects. The parameters of model are estimated by linear regression through variable transformation or Virene's method. The proposed model is compared with respect to the average relative prediction error criterion. Experimental results show that the pro-posed model performs better the models based on the logarithmic type Gompertz growth curve.

• Journal of Digital Convergence
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• v.10 no.4
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• pp.309-316
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• 2012

This study used the health belief model of college students to investigate the not with regards to their health status awareness, health management, and their health beliefs. Logistic regression analysis showed a significantly high odds ratio between intent of hepatitis B vaccination and gender, The trend for receiving a hepatitis B vaccination was highest in groups with awareness of the high susceptibility and seriousness of hepatitis B, groups with awareness of the low barrier, and women as opposed to men. Therefore future research is needed regarding appropriate promotions of the seriousness and benefits of hepatitis B vaccinations as well as the development of a integrated health education mediation program and effect evaluation.

• Anxiety and mood
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• v.15 no.1
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• pp.35-44
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• 2019

Objective : The aim of this study was to investigate the individual and job related factors as risk factors for mental health of firefighters. Methods : The data of 202 fire-fighters was analyzed by using a multinomial logistic regression analysis. All participants completed self-reported questionnaires including demographics (sex, age, work duration), the Childhood Trauma Questionnaire, the Ways of Coping Checklist, the Colleague related traumatic events, the Korean occupational stress scale, the Korean Perceived Stress Scale-10, and the Beck Depression Inventory. Participants were divided into three groups according to the level of stress and depressive symptom scores: Low Stress-Low Depression (LS-LD), High Stress-Low Depression (HS-LD), and High Stress-High Depression (HS-HD). Results : A job related factor-organizational injustice-was a significant factor related to HS-LD, while individual factors such as active coping level and childhood trauma experience and a job related factor-difficult physical environment-were significantly associated with HS-HD. Conclusion : These results imply the need to take both individual and environmental approaches into account when managing the stress and depression of firefighters. More specifically, psycho-education to facilitate active coping strategy and adaptive emotional regulation at the individual level and the improvement of physical work environment of firefighters should be supported.

• International Commerce and Information Review
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• v.4 no.2
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• pp.253-277
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• 2002

Nowaday, the advanced technology in information and communication has been leading the dramatic change of transaction paradigm expansion from physical basis to electronic one. As we know, financial services support most of financial exchange between two business parties. So the expansion of electronic transaction paradigm affects to every financial institutions which provide financial services. Thus, financial institutions have accepted e-Finance systems and providing internet financial services to live in the competition. The purpose of this study is to contribute the qualitative enhancement of its customer service, rapid diffusion and accurate strategy establishment for e-Finance industry in the user side. Through the literature review and factor and reliability analysis, this study selects six diffusion factors such as efficiency of perceived e-Finance, reliability and safety of e-Finance in perceived e-Finance itself's characteristic; confidence, technical factors and the customer service quality of e-Finance system in perception on e-Finance System; inclination to innovation in the personal characteristic. According to result of hypothesis verification by using logistics regression analysis, technical factors and the customer service quality of e-Finance system in perception on e-Finance System and inclination to innovation in the personal characteristic gave statistically positive effect to the diffusion decision at the significant level 0.05 and 0.01. However efficiency of perceived e-Finance, reliability and safety of e-Finance in perceived e-Finance itself's characteristic didn't affect to diffusion decision and confidence of e-Finance system in perception on e-Finance System didn't have any statistical significancy. This study can be used as a basic material for the forward empirical study of diffusion factors in the user side and be able to apply to company and government policy making or embodiment, determination for customer service quality degree of financial institutions. But this study has some limitations like didn't touch satisfaction factors and its effect, only deal domestic customers and didn't use multi-regression analysis.

• Journal of agricultural medicine and community health
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• v.24 no.2
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• pp.245-268
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• 1999

It is necessary that the old should have the physical and social ability to perform their daily life. This study is to grasp their degree of disability and problems and suggest their solutions. It surveyed the 87 old people over 65 years old from September 1st until September 30th, in 1997. The findings are as follows. 1) The activities of daily living(ADL) to find their degree of physical disability shows that their average performance ability is 75.9% of all the action while 24.1% of all the old people needs the others' help. As they get older and older, the aged drop off in their physical ability, which is related to a statistical sense (p<0.001). 2) The social disability shows that the aged have their great difference from 9.2% to 85.1% in their instrumental activities of daily living(IADL), intellectual ability and social role. 3) A simple analysis shows that the activities of daily living are, in a statistical sense, related to age(p<0.001), the use of elder's hall(p<0.001), the understanding degree of health(p<0.01) and so forth. 4) A simple analysis shows that the instrumental activities of daily living are, in a statistical sense, related to age(p<0.001), the degree of education(p<0.05), the life of leisure(p<0.001), the understanding degree of health and so forth. 5) A multivariate logistic regression analysis shows that the disability of daily living is related to age, the visit of elder's hall, the period of solitary living, instrumental activities of daily living is age and the visit of elder's hall, and social role is the visit of elder's hall and the decree of education, while intellectual activity has no related variables in a statistical sense.