• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.7
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• pp.2703-2718
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• 2015

Nowadays, public cloud storage is gaining popularity and a growing number of users are beginning to use the public cloud storage for online data storing and sharing. However, how the encrypted data stored in public clouds can be effectively shared becomes a new challenge. Proxy re-encryption is a public-key primitive that can delegate the decryption right from one user to another. In a proxy re-encryption system, a semi-trusted proxy authorized by a data owner is allowed to transform an encrypted data under the data owner's public key into a re-encrypted data under an authorized recipient's public key without seeing the underlying plaintext. Hence, the paradigm of proxy re-encryption provides a promising solution to effectively share encrypted data. In this paper, we propose a new certificate-based proxy re-encryption scheme for encrypted data sharing in public clouds. In the random oracle model, we formally prove that the proposed scheme achieves chosen-ciphertext security. The simulation results show that it is more efficient than the previous certificate-based proxy re-encryption schemes.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.4
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• pp.2254-2275
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• 2017

In this paper, we present an IND-CCA2 secure certificateless proxy re-encryption scheme in the random oracle model. A certificateless public key cryptography simplifies the certificate management in a traditional public key infrastructure and the built-in key escrow feature in an identity-based public key cryptography. Our scheme shares the merits of certificateless public key encryption cryptosystems and proxy re-encryption cryptosystems. Our certificateless proxy re-encryption scheme has several practical and useful properties - namely, multi-use, unidirectionality, non-interactivity, non-transitivity and so on. The security of our scheme bases on the standard bilinear Diffie-Hellman and the decisional Bilinear Diffie-Hellman assumptions.

• Korean Journal of Health Education and Promotion
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• v.25 no.2
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• pp.19-30
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• 2008

This study has comparatively analyzed the primary success factors in smoking cessation among new enrollees and re-enrollees of a smoking cessation clinic in order to find out how to efficiently operate smoking cessation clinics at public health centers. The study was conducted with 262,837 smokers aged 19 or over who were provided with smoking cessation services for more than 6 months after being registered with the smoking cessation clinic at public health centers(250 clinics nationwide) from July 16, 2006 to July 15, 2007. After dividing smokers into re-enrollees and new enrollees of the smoking cessation clinic, the success rate of and success factors for smoking cessation over 6 months have been investigated. The success factors in smoking cessation have been compared between new enrollees and re-enrollees of smoking cessation clinics. The results can be summarized as follows: First, the success rate of smoking cessation for 6 months at smoking cessation clinics of public health centers was higher in new enrollees (46.3%) than in re-enrollees (41.1%). Second, the common factors that had an influence on the success of smoking cessation of both new enrollees and re-enrollees of the smoking cessation clinic included age, social security, service, frequency of counseling, number of cigarettes per day, and alcoholic problems. Third, compared to new enrollees, re-enrollees had a higher success rate of smoking cessation as they got older. In terms of the success rate of health insurance, on the contrary, new enrollees were better than re-enrollees. Fourth, the study showed a higher success rate in smoking cessation in both new and re-enrollees if they had no alcoholic problems. In particular, a higher success rate was observed in re-enrollees when there were no alcoholic problems. To efficiently operate smoking cessation clinics at public health centers, this study confirmed that counseling should be tailored depending on the types of enrollees in the program.

• Journal of Preventive Medicine and Public Health
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• v.51 no.2
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• pp.71-82
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• 2018

Objectives: Areca nut is widely consumed in many parts of the world, especially in South and Southeast Asia, where cardiovascular disease (CVD) is also a huge burden. Among the forms of CVD, acute coronary syndrome (ACS) is a major cause of mortality and morbidity. Research has shown areca nut chewing to be associated with diabetes, hypertension, oropharyngeal and esophageal cancers, and CVD, but little is known about mortality and re-hospitalization secondary to ACS among areca nut users and non-users. Methods: A prospective cohort was studied to quantify the effect of areca nut chewing on patients with newly diagnosed ACS by categorizing the study population into exposed and non-exposed groups according to baseline chewing status. Cox proportional hazards models were used to examine the associations of areca nut chewing with the risk of re-hospitalization and 30-day mortality secondary to ACS. Results: Of the 384 ACS patients, 49.5% (n=190) were areca users. During 1-month of follow-up, 20.3% (n=78) deaths and 25.1% (n=96) re-hospitalizations occurred. A higher risk of re-hospitalization was found (adjusted hazard ratio [aHR], 2.05; 95% confidence interval [CI], 1.29 to 3.27; p=0.002) in areca users than in non-users. Moreover, patients with severe disease were at a significantly higher risk of 30-day mortality (aHR, 2.77; 95% CI, 1.67 to 4.59; p<0.001) and re-hospitalization (aHR, 2.72; 95% CI, 1.73 to 4.26; p<0.001). Conclusions: The 30-day re-hospitalization rate among ACS patients was found to be significantly higher in areca users and individuals with severe disease. These findings suggest that screening for a history of areca nut chewing may help to identify patients at a high risk for re-hospitalization due to secondary events.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2008.11a
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• pp.601-605
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• 2008

In the current Public-Private Partnership, Applying Ex-post management is rising after the completion of construction. So, Advanced countries of construction are getting additional profit from Re-financing while repairing system about Re-financing. But within the our country positive introduction is difficult because of insufficient of social sympathy about Re-financing, shortage of support from government and imperfection of detail regulation. So this study analyzes the cases of Ex-post management Which are applied to Public-Private Partnership that is adopted by project financing in domestic and overseas field and considers plans which can apply more efficiently in Public-Private Partnership. We anticipate that the results of this study can be utilized for materials that can help people who want to understand hereafter introduction of Ex-post management in domestic Public-Private Partnership and expect that the materials can be used for data developing system of Ex-post management.

• Asian Pacific Journal of Cancer Prevention
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• v.17 no.1
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• pp.231-234
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• 2016

Opisthorchis viverrini infection is associated with cholangiocarcinoma particularly in the cases of chronic or re-infection. This presents a serious health problem in northeastern and northern Thailand. A community base approach is required for surveillance. Therefore, in a pilot project, re-examination of O. viverrini infection was conducted in the 3 districts of Nakhon Ratchasima province, Thailand, during June and October 2015. A total of 355 participants from a 194,152 population, was selected through multi-stage sampling. O. viverrini infection was determined using modified Kato Katz thick smear technique. Participants were 229 males and 126 females, and aged ${\geq}30$ years old. Prevalence of O. viverrini infection was 2.25% (8/355 participants). O. viverrini infection was slightly higher in females (3.17%), and age group between 41-50 years (4.49%). Mueang Yang district had a highest of O. viverrini infection rate (2.82%), and followed by Bua Yai (2.48%), and Chum Phuang (1.84%), respectively. O. viverrini infection rate was increased from year 2012 to 2015 particularly in Bua Yai and Mueang Yang. These re-examinion results indicate that opisthorchiasis is still problem in community of Nakhon Ratchasima province, therefore, the provincial-wide scale is need required. Furthermore health education is need intervened in the infected group, and screening of cholangiocarcinoma is urgently concerned.

• Asian Journal for Public Opinion Research
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• v.8 no.4
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• pp.407-408
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• 2020

• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.5
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• pp.1018-1025
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• 1997

In this paper, we propose the interworking and emulation methods for the interoperability of ABR/ABT capability and algo propose the BCR Re-negotition with State-Dependent (BRSD) mechanism based on the common buffer with two thresholds and the EBCN method when public network hs the ABT capability. As BRSD mechansism has one common buffer for all ABR connectiona and BCR re-negotiation request according to the threshold, it can reduce the queue length and the frequency of ABT BCR re-negotiation. Using EBCN method, BRSD mechanism can prevent the continuous increasing of queue length in the emulation method with the CI bit setting of the ABR performance of the BRSD mechanism in the view poits of the masimum queue length, bandwidth utilization and ABT-BCR re-negotialtion frequency trough the simulation.

• Journal of agricultural medicine and community health
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• v.33 no.3
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• pp.292-302
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• 2008

- Abstract - Objectives: The purpose of this paper is to determine an efficient operation plan for a smoking cessation clinic in public health centers. To do so, the primary success factors in smoking cessation have been analyzed after classifying the smoking cessation programs of public health centers into urban and rural areas. Methods: A study was conducted with 262,837 smokers age 19 or older who were provided with smoking cessation services for more than 6 months through smoking cessation clinics at public health centers(250 clinics nationwide) from July 16, 2006 to July 15, 2007. Results: Urban areas indicated that gender, age, social security, the frequency of counseling, re-enrollment in the program, the number of cigarettes per day and alcohol problems were all factors that influenced the success of smoking cessation. On the other hand, in the rural areas the total number of counseling, re-enrollment in the program, the number of cigarettes per day and alcohol problems were the influential factors. Furthermore, the urban area confirmed that the frequency of counseling, re-enrollment in the program, the number of cigarettes per day and alcohol problems affected traveling while the rural area was affected by social security, the frequency of counseling and re-enrollment. Conclusions: It has been confirmed that the success rate and factors of smoking cessation clinics can vary depending on the region and enrollment method.

• Journal of Information Management
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• v.43 no.2
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• pp.133-150
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• 2012

This study showed the activation of public library services utilizing twitter. Top five American public library twitter's 1,373 tweets collected, analyzed by content types and examined applicability into public library services. Based on the results, it suggested that public library services can be activated by auto-tweeting informations within home page, re-tweeting of timely informations, generating HASH tag, using diverse social medias, active re-tweeting/replying, and utilizing twitter programs such as twit-bot. Finally, the study proposed that evaluations about twitter services such as satisfaction survey should be carried out.