• Journal of the Korea Society of Computer and Information
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• v.22 no.4
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• pp.91-97
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• 2017

In this paper, we propose a Recently, the use of Smart phones surge in youth the youth are becoming a big addiction social problems Mobile Messenger. The prevalence of Smart phones is Mobile Messenger, access time, spatial constraints for assured. As a result, pc room, with a focus on traditional Internet addiction is to be reduced, whereas with a focus on Mobile Messenger Smartphone addiction level is rapidly on the rise. Korea information agency of Internet addiction and mobile addiction risk appeared to be well over 10 percent of the rate of 35% is gaming and mobile addiction unfolds exemplifies the seriousness of Messenger. Addiction is the individual's psychosocial problems such as negative consequences can result, causing the addiction, because it is necessary for an understanding of the mechanism. In this study, Mobile Messenger, the leading factors affecting the addiction said. Mobile Messenger is a major factor causing the addiction habit and consider the user's satisfaction. And social relations and the formation of plougastel Wu Mobile Messenger and its impact on the cause of addiction.

• Journal of Institute of Control, Robotics and Systems
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• v.19 no.11
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• pp.1043-1047
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• 2013

Smart mobile robot is a kind of Intelligent Robot. It means that operates manipulate autonomously and recognize the external environment. Smart mobile robot moving mechanism has many type and the type depend on the robot shape or purpose. Recently, research on the moving mechanism has been actively in many area. The moving mechanism divided to wheel type, crawler type, walking type, other type and the moving type choose by the kind of robot or the purpose robot. In this paper, describe the kind of moving mechanism on the smart mobile robot and the technical trend of moving mechanism of smart mobile robot.

• Journal of Information Technology Services
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• v.11 no.2
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• pp.19-47
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• 2012

Contemporary smartphone competition is generally described as the battle between Apple's proprietary platform and Google's open platform. However, this competition is not limited within smartphone adoption itself. User's pre-adoption of one mobile platform via smartphone can be connected to the post-adoption of the same mobile platform based on the other smart devices (e.g. smart pad). In this study, we investigate whether user's preference to a certain platform is persistent over mobile ecology, from the pre-adoption of one smart device to the post-adoption of following devices. For this investigation, we adopt the dual-model as the ground theory, where post-adoption of IT product is explained by both dedication and constraint factors. The empirical testing first evidences that dual model works well as our research model for identifying the reasons of post-adoption. Next, we group our data into two parts in order to compare the switching behavior of iPhone users and Android phone users. iPhone users show much lower switching rate to Android based smart pads, while Android phone users show higher churn rate to iPad (49.3% : 96.3%). Especially, satisfaction showed much stronger effect than switching cost on the continuing intention of existing platform, when the analysis is given to the iPhone user's group. From this result, we can conjecture the relatively stronger loyalty of iPhone users. More managerial implications on the mobile platform strategy are driven.

• Journal of Digital Contents Society
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• v.18 no.7
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• pp.1465-1474
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• 2017

The study analyzed how the user uses the smart mobile device to assess the effects of the user's acceptance factor and user-factors affecting the work performance of Public Agencies. And Prove that leveraging smart devices can improve your business performance, It was aimed at making strategic recommendations to improve the suitability of smart mobile devices and Tasks. Smart mobile devices User Innovation has affected Usefulness, such as B=.296. p.000, it also affected Perceived Ease-of-Use, such as B=.326, p.000. job fitness has affected Perceived Ease-of-Use, such as B=.261, p.001. Usefulness and Ease-of-Use had a positive affect on work performance. Each of affect on much of B=.382 and B=.488(p.000). At the conclusion, it has been validated that the effects of smart mobile devices user Innovation and job fitness on work performances are mediated by perceived usability and perceived ease of use of the smart mobile device.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.1
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• pp.67-73
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• 2011

With the rapid growth of recent smart phone technology, the interests for the design of online game in mobile computing environment are highly focussed on with great attention. Smart phone as a mobile terminal device, however, has many restrictions for implementing online mobile game since the limitation of relatively low performance of a processor, low resolution of GUI, small memory spaces, and short battery power. Therefore, most of games are very restricted on online and multi-play functions. In this paper, we design and implement mobile online game app in component based smart phone environment in order to take over these restrictions in mobile environment. Especially, the implemented mobile game is able to play online game among Wi-Fi based game server and another smart phone.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.20 no.6
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• pp.83-96
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• 2010

The rapid spread of smart phone in recent years changes not only personal life but also work environment of organizations. Moreover, smart phone provoke service combination between industries and transit the digital paradigm in our society because of the character that anyone can develop or use the application of smart phone. Under these circumstances, the government hastens the construction of mobile-government in order to improve national services and communication with people. However, since security threats on smart phone become more critical recently, we should hurry the counter measures against mobile threats or we will face obstacles to the activation of mobile-government. On this article, we suggest the methods of information security and the Mobile-government Information Security Management System(M-ISMS) on the smart phone use environment for building up the secure and convenient mobile system in the national institution.

• Journal of the Korea Convergence Society
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• v.2 no.1
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• pp.1-6
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• 2011

The wide use of mobile devices such as smart phones makes the mobile commerce industry be growing-up rapidly. In mobile commerce security, how to secure a copyright of mobile contents and how to distribute it are of major concerns. The user can carry the smart phone regardless of the places. Thus the utilization of it is very high than that of personal computers. The USIM(Universal Subscriber Information Module) inserted in the smart phone binds the user with the device. This means that the smart phone can be used to represent the owner's identity. In this paper, we develop the mobile ID based digital signature scheme. We create the mobile ID by combining USIM with the user's random secret value. In addition, undeniable property of our signature scheme can make ID based applications such as mobile voting and mobile content distribution be possible with the smart phone.

• 전자공학회논문지 IE
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• v.48 no.4
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• pp.30-39
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• 2011

This paper proposed a new concept of information space called Smart Floor. Smart Floor is an intelligent space where a mobile robot can read and write specific information through Radio Frequency IDentification (RFID) tags which are mounted on Smart Floor to drive its goal position. RFID tag packaging technology is described for building Smart Floor. Also a mobile robot equipped passive RFID System with ultra high frequency (UHF) bandwidth has developed. The information that consists of an absolute position in the Smart Floor and desired direction saved on RFID tags is a simulated Q-value based on Q-learning algorithm. Proposed Smart Floor will be a proper method to communicate between space and robot.

• Journal of Welding and Joining
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• v.31 no.4
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• pp.34-41
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• 2013

In the smart life era where the majority of economically active population uses mobile devices, smart devices have formed a new service market. In this study, we developed a shipyard quality management application using mobile devices such as smart phones and tablet PCs. For this purpose, the problems were derived through the analysis of the quality management work on shipyard and the considerations were extracted to build a smart work environment by analyzing the case studies of smart work in other industrial fields. Among the shipyard quality management work, functions thought to be highly utilized when converted to a mobile system has been developed as a mobile application. The application was developed by applying an object-oriented component-based development (ooCBD) methodology, and is expected to improve the user experience and the efficiency of quality management operations in shipyard.

• 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.