• Informatization Policy
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• v.27 no.3
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• pp.56-81
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• 2020

The purpose of this research is to empirically examine the effects of motivation and skill for digital devices and the Internet on the use of online services in the severely disabled people. In addition to the general effect of digital divide, particularly for the case of severely disabled people, the effects of physical and mental inconvenience of individuals were taken into account and the moderating effect was confirmed by classifying the groups that need help with online activities and those that do not. The 2018 Digital Divide Survey data of the National Information Society Agency was used for the study. As a research method, path analysis and multi-group analysis using a sequence access model to Internet use were performed. As a result, it was confirmed that even in the case of the disabled, the motivational factor affects the skill for digital device operation and Internet use, and this access skill sequentially affects the use of online services. In particular, it was found that the effect of strategic and technical skill for internet use is the most important for the use of online services for the disabled rather than the motivation or a simple operational skill for digital devices. In addition, it was found that even in the disabled group, those requiring help in using the Internet was more passive in using the online service than the rest in the group. The results of this study suggest the need for stronger capacity for physical access as well as support in building strategic and technical skills that enhance responsibilities and protect from risks in using the Internet among the people with disabilities.

• Journal of Digital Convergence
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• v.14 no.5
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• pp.11-19
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• 2016

SNS users are continuously increasing and SNS is emerging as a major PR channel of government. In particular, SNS can be a useful tool, but also the challenges for risk communication. This study is examined how nuclear regulatory organizations' SNS management and visitors' responses to the facebook pages in Korea and U.S.. Results indicated that both organizations frequently used information-oriented posting. Concerning the types of PR, NSSC tended to mainly use 'Relationship-Management PR', NRC mainly use 'Image PR.' In addition, our analyses on visitors' responses showed that visitors usually in response to participational and visual(ex. video, card news) typed contents. Based on its' results, this study provides practical suggestions for government's future SNS management strategies.

• Journal of Digital Convergence
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• v.11 no.12
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• pp.319-326
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• 2013

There are many software reliability models that are based on the times of occurrences of errors in the debugging of software. Software error detection techniques known in advance, but influencing factors for considering the errors found automatically and learning factors, by prior experience, to find precisely the error factor setting up the testing manager are presented comparing the problem. It is shown that it is possible to do asymptotic likelihood inference for software reliability models based on infinite failure model and non-homogeneous Poisson Processes (NHPP). Statistical process control (SPC) can monitor the forecasting of software failure and thereby contribute significantly to the improvement of software reliability. Control charts are widely used for software process control in the software industry. In this paper, we proposed a control mechanism based on NHPP using mean value function of logarithmic hazard learning effects property.

• Journal of Digital Convergence
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• v.11 no.12
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• pp.537-549
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• 2013

This study examines implications for the Korean military health survey from literature review on foreign military health surveys. The authors discuss backgrounds, objectives, participants, methods, contents, organizations involved, and cycles of foreign military health surveys from literature review from peer-reviewed journals as well as reports and documents collected from web-sites of governmental organizations. Common and distinguishing characteristics were found from foreign military health surveys. First, the military health surveys have evolved in phases in the direction of reducing health risk factors. Second, the importance of mental health is being emphasized. Third, cooperations and collaborations of governments, universities, and professional agencies are important in order to ensure anonymity and expertise on data collection and analysis. Finally, health surveys are conducted on a regular basis through institutionalization. To monitor and to promote health of military personnel, it is critical for Korea to establish the legal and institutional environment and to recognize the importance as well as the need of military health surveys at the national level.

• Journal of Digital Contents Society
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• v.19 no.6
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• pp.1185-1195
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• 2018

Industrial Control System (ICS) is a system that carry out monitoring and controls of industrial control process and is applied in infrastructure such as water, power, and gas. Recently, cyber attacks such as Brutal Kangaroo, Emotional Simian, and Stuxnet 3.0 have been continuously increasing in ICS, and these security risks cause damage of human life and massive financial losses. Attacks on the control layer among the attack methods for ICS can malfunction devices of the field device layer by manipulating control commands. Therefore, in this paper, we propose a mechanism that apply the SDN between the control layer and the field device layer in the industrial control system and to determine whether the control command is legitimate or not and we show simulation results on a simply composed control system.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.315-320
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• 2015

User Authentication in Online service is essential for accurate and safe service. For this user authentication, One Time Password(OTP) is frequently used. To satisfy one-time-use characteristic of OTP, Offset information to generate OTP or final OTP value get generated through OTP generator or security card which could be lost. In this study, OTP generation method that bypasses OTP generator or security card by using health information collected from u-Health care system is proposed. Suggestion is that health information collected through wearable devices get utilized to offset information that are applied in OTP generations. OTP generated using suggested methods showed similar results than current OTP generation methods in the collision resistance test which tests how often it generate same authentication numbers, this implies that new proposed method can be applied to various on-line services.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.301-313
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• 2015

Robot technology has become a crucial part of today's business operation. In fact, more manufacturing firms have been utilizing robot technology in order to increase operational efficiency and productivity. Thus, this study develops the research model investigating firms; behavior for process innovation with intelligent robot. Three categories - Technical, Entrepreneur, and Environmental characteristic - are proposed in the research model as determinants of process innovation. These three characteristics include six variables(Perceived Direct Usefulness, Perceived Indirect Usefulness, Innovation, Risk Senstivity, Perceived Industry Pressure, and Perceived Government Pressure) as influencing factors on process innovation. The data from 77 employee at manufacturing firms were analyzed to test proposed hypotheses. The results reveal that all variables with exception of Perceived Government Pressure have a significant influence on process innovation. Based on the study results, theoretical and practical implications for process innovation with intelligent robot technology are discussed.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.473-481
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• 2015

The flood and environment surveillance network on riverside is a network requiring a way to efficiently manage the information from all kinds of sensors, along with an optical communication device that can deliver high-quality video information at high speed. Since on-site prompt recovery is very important especially for communication problems that occurred due to cut-off or aged network, various researches have been carried out on this. However, because the security against outside hacking or outside intrusion with illegal purposes is very important for environment surveillance network, such as the national backbone network, an efficient network maintenance and repair should be enabled while satisfying security and reliability at the same time. A characteristic of requirement is that when security is improved, the efficiency of maintenance and repair drops as they are conflicting to each other. Therefore, this research proposed a system in order to satisfy the conflicting requirement and improve security, by developing a one-way Bypass TAP and an android-based smartphone app that can enable efficient network maintenance and repair.

• Journal of Digital Convergence
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• v.10 no.6
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• pp.1-6
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• 2012

In modern society, the amount of information has been significantly increased according to the development of IT convergence technology. That leads to develop information obtaining and searching technologies from lots of data. However, they don't seem to have been actually effective for users' health care and promotion not only for limitations of Web-based information and but for lack of personalization. Health information support services have been generally developed in a format of inputting data on bio-information acquired into the computer for the existing network-based transmission. In this paper, a life habits disease system that uses the existing medical data and Framingham risk factor(FRS) performs neural network is proposed. Based on the proposed system, it is possible to provide the fundamental data and guideline to doctors for recognizing the life habits disease diagnosis of patients and that represents increases in the welfare of patients.

• Journal of Digital Convergence
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• v.10 no.5
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• pp.215-222
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• 2012

A smart phone has functions of both telephone and computer. The wide spread use of smart phones has sharply increased the demand for mobile commerce. The smart phone based mobile services are available anytime, anywhere. In commercial transactions, a digital signature scheme is used to make legally binding signature to prove both integrity of commercial document and verification of the signer. Smart phones are more risky compared with personal computers on the problems of how to protect privacy information. It's also easy to let proxy user to authenticate instead of the smart phone owner. In existing password or token based schemes, the ID is not physically bound to the owner. Thus, those schemes can not solve the problem of proxy authentication. To utilize the smart phone as the platform of mobile commerce, a study on the new type of authentication scheme is needed where the scheme should provide protocol to get legally binding signature and not to authenticate proxy user. In this paper, we create the mobile ID by using both the USIM and voice template of the smart phone owner. We also design and implement the user authentication scheme based on the mobile ID.