• Journal of Information Technology Services
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• v.13 no.3
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• pp.275-298
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• 2014

The purpose of this study is to verify the difference between the importance level and the satisfaction level of each purchase decision factor of smart phone. Through review of literatures about purchase decision factors, we have derived about attributes of 6 factors. T-test, importance performance analysis (IPA), and regression analysis were conducted to identify priorities among the details of the importance and satisfaction and to analyze the effect relationship between satisfaction of each factor and overall satisfaction. Looking at a few high-priority order, battery capacity, memory capacity, fast and accurate repair, the adequacy of the repair cost, and processor in the top five factors were shown to be an important factor when purchasing smart phones. The results of this study can provide the marketing strategies for smart phone suppliers. In addition, these results imply what factors of smart phones should be more considered before launching into chinese smart phone market.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.5
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• pp.454-463
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• 2013

The smart phone has already proliferated, and the smart devices of the living appliances and vehicles embedded with communication device, sensors and connected with the smart phone have been developed. Currently it can provide simple remote controller and user interfaces, it could be envisaged that intelligent technology is converged with the smart phone, and Personal Environment Service in which the smart devices are configured automatically as reflecting personal preference, device attribute, and living environment condition would be activated in the future. In this paper PES services, system architecture, and core technology are described.

• Journal of the Korean Society of Industry Convergence
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• v.23 no.5
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• pp.747-756
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• 2020

In recent years, measurement in a smart-phone environment is attracting attention in various fields due to its easy set-up process, various functions, convenience and expandability. Even in the field of safety evaluation and maintenance of large-scale infra-structures, the appropriate application of these effective and convenient measurement techniques can be of great help. In this paper, an experimental study was conducted to investigate the effectiveness, problems and complementary methods of applying smart-phone accelerometers to the measurement in infra-structure such as bridges. In model bridge subjected to impact and moving loads, the measured accelerations using a smart-phone and a professional accelerometer were directly compared in time domain. And the statistical and frequency characteristics of the measured signal and transfer function were also examined in frequency domain. The results show that the accuracy of measurement using smart-phone sensor is primarily affected by its incomplete sampling performance. In conclusion, smart-phone sensors cannot be considered suitable for precise assessment, where measurements must be accurate over a wide frequency range, but we can say that the technique is still useful and fairly accurate for some purpose over a limited frequency range, such as the low pass frequency range, which is a major concern for civil structures.

• International Commerce and Information Review
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• v.16 no.4
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• pp.35-54
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• 2014

Since smart phone users are continually increasing, smart phone based mobile banking users are increasing too. Therefore this study analyzes behavior of smart phone based mobile banking users. This study surveyed 400 people aged 10 to 50. The survey shows social effect influences convenience of smart-phone based mobile banking, perceived danger, and perceived security. Also,'promptness', the element of convenience has influence on trust. As perceived danger was higher, it was more vulnerable to resistance. The intention of smart-phone based mobile banking was influenced by trust and resistance. Specifically rising of intention was more influenced by lifting trust than lowering resistance.

• Korean Journal of Health Education and Promotion
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• v.33 no.2
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• pp.39-45
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• 2016

Objectives: The purpose of this study is to parenting attitudes perceived by adolescents into different groups and to examine the impact of sub-factors of parenting attitudes on smart phone addiction. Methods: Data was collected by distributing questionnaires to high school students located in the nationwide regions and a total of 1,020 people were surveyed. Inconsistent parenting attitudes were divided into the consistent group and inconsistent group to carry out descriptive statistics, multiple regression, and path analysis. Results: In both the consistent and inconsistent parenting attitude groups, it was found that among the sub-factors, interest(p<.01) had the biggest impact on smart phone addiction. Inconsistent parenting attitude group was found that smart phone addiction levels in adolescents were more higher than consistent parenting attitude group. Conclusions: Through the above results, it was confirmed that smart phone addiction to directly impact parenting attitude. This implies that when raising their children, parents should display consistent attitudes in order to prevent addictive smart phone usage among adolescent.

• Convergence Security Journal
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• v.15 no.6_2
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• pp.89-97
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• 2015

The Smart phone is the mobile phone added to mounted equipment miniaturized operating system of PC and wireless phone possible hardware, software modules. This study is examine about Smart phone supply spreading process and characteristic by age. And this study is wish to investigate about age-based features of the media usage attitude via a Smart phone as a reference questionnaire of KISA and KISDI. Smart phone is easy-to-use and excellent portability and mobility like Pocket PC. It is easy to information and data search anytime and anywhere unaffected by time and place. It is to possible a variety of information exchange with several acquaintances and easy to photos and video photography. Wish to improve the life satisfaction with widely using for smart phones at all ages.

• Journal of the Korean Society of Physical Medicine
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• v.10 no.2
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• pp.1-7
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• 2015

PURPOSE: The aims of this study were to assess the intra-tester and inter-tester reliability and validity of hip range of motion using a smart phone in hip operative patients. METHODS: Twenty-five patients (eight total hip arthroplasty and seventeen femur neck fracture) participated in this study. The range of motions in active and passive hip flexion, abduction and external rotation were measured with a goniometer and smart phone over two times by two observers. The intra-tester and inter-tester reliability were evaluated using the intraclass correlation coefficient (ICC2,1). The validity was measured by Pearson's correlation coefficient RESULTS: The intra-observer reliability was good in all measured items (ICC>0.78). The inter-observer reliability was high with ICC (>0.90). All correlation coefficients of smart phone and goniometer was greater than 0.85 and showed a significant positive correlation (p<0.01). CONCLUSION: The range of motion measurement with a smart phone showed acceptable reliability. Therefore, it could be convenient and have economical benefits to measure the range of motion of the hip joint using a smart phone.

• The Mathematical Education
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• v.53 no.2
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• pp.239-261
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• 2014

The purpose of this study is to analyze the influences of discussion-based learning of mathematics using smart phone application on the middle school students' mathematics learning. For this purpose, we selected 6 open problems suitable for learning mathematical reasoning and five 3rd grade middle school students as participants who expected to participate in 6 lessons of discussion-based learning of mathematics using smart phone application. From the analysis of 6 lessons, we found the following results. First, attending the lessons of discussion-based learning of mathematics using smart phone application makes students more interested in mathematics and change their mathematics learning attitudes more positively. Second, the lessons of discussion-based learning of mathematics using smart phone application facilitate students' mathematical communication with the help of various communication methods using many functions of smart phone applications. Third, the lessons of discussion-based learning of mathematics using smart phone application provide teachers with teaching-learning environment where teachers can easily give their students consultation about mathematics learning or daily life.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.6 no.1
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• pp.64-83
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• 2012

The number of smart phone users is rapidly growing due to recent increase in wireless Internet usage, development of a wide variety of applications, and activation of M2M (Machine to machine) services. Although the smart phone offers benefits of mobility and convenience, it also has serious security problems. To utilize M2M services in the smart phone, a flexible integrated authentication and access control facility is an essential requirement. To solve these problems, we propose a context-aware single sign-on and access control system that uses context-awareness, integrated authentication, access control, and an OSGi service platform in the smart phone environment. In addition, we recommend Fuzzy Logic and MAUT (Multi-Attribute Utility Theory) in handling diverse contexts properly as well as in determining the appropriate security level. We also propose a security system whose properties are flexible and convenient through a typical scenario in the smart phone environment. The proposed context-aware security system can provide a flexible, secure and seamless security service by adopting diverse contexts in the smart phone environment.

• Journal of Advanced Navigation Technology
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• v.14 no.6
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• pp.970-974
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• 2010

According to IT technology has evolved, smart phone rapidly propagates for mobility. A smart phone user acquires useful information, but attackers generate various damage. For example, an attacker must distribute to expose the privacy of others. To solve this problem, various information security products are being developed. In addition, information security has been strengthened. In this paper, we propose a scheme for secure use of smart phone. For development of secure smart phone, the development processes should be secure. In addition, we propose an information security production certification system for secure smart phone security.