• 한국IT서비스학회지
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• 제13권3호
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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.

• 한국통신학회논문지
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• 제38C권5호
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• pp.454-463
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• 2013

스마트폰은 이미 보편화되었고 가전기기나 자동차 등의 각종 생활기기에 통신장치 및 센서가 내장되어 스마트폰과 연동되는 스마트 기기들이 연구 개발되고 있다. 또한 현재는 스마트폰을 이용한 단순한 리모컨이나 원격 제어장치, 사용자 인터페이스의 수준이지만 향후에는 스마트폰에 지능화 기술이 융합되어, 사용자나 기기, 생활환경의 속성을 반영하여 자동으로 기기들이 개인 맞춤형으로 설정되는 개인 환경 서비스 기술이 활성화될 것이다. 본 논문에서는 관련 서비스와 시스템 구조, 요소 기술에 관해 기술한다.

• 한국산업융합학회 논문집
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• 제23권5호
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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.

• 통상정보연구
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• 제16권4호
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• pp.35-54
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• 2014

스마트폰 이용자가 지속적으로 늘어나며 스마트폰 기반 모바일뱅킹 이용고객 또한 늘어나고 있다. 본 연구에서는 스마트폰 기반 모바일뱅킹 고객의 행동을 분석하고자 한다. 이를 위하여 이론적 연구모형을 제시하였으며, 실증분석을 위하여 10대에서 50대의 400명을 대상으로 설문조사를 실시하여 그 유의성을 검증하였다. 그 결과, 사회적 영향은 스마트폰 기반 모바일뱅킹의 편리성과 지각된 위험 그리고 지각된 보안에 영향을 미치고 있었으며, 편익의 요소 중 즉시성이 신뢰에 영향을 미치고 있었다. 또한, 지각된 위험이 높을수록 사용자의 저항이 더욱 크게 영향을 받았으며, 스마트폰 기반 모바일뱅킹의 사용의도는 신뢰와 저항 수준에 따라 영향을 받고 있었는데, 구체적으로는 저항을 낮출 때 보다 신뢰를 높일 때 더 높아지는 것으로 나타났다.

• 보건교육건강증진학회지
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• 제33권2호
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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.

• 융합보안논문지
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• 제15권6_2호
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• pp.89-97
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• 2015

스마트폰은 PC의 소형화된 운영 체제를 탑재한 기기에 무선전화가 가능한 하드웨어와 소프트웨어 모듈이 추가된 휴대 전화이다. 본 연구는 연령별로 스마트폰이 보급 확대되는 과정 및 특성에 대해 살펴보고자 한다. 또한 KISA와 KISDI의 설문조사를 참고하여 스마트폰을 통한 미디어 이용 행태의 연령별 특징에 대해 조사해 보고자 한다. 스마트폰은 손쉽게 사용이 간편하고 소형 PC와 같아 휴대성과 이동성이 뛰어나다. 시간과 장소의 영향을 받지 않고 언제 어디서나 정보 및 자료 검색이 용이하다. 사진 및 동영상의 촬영이나 저장이 용이하고 여러 지인들과 다양한 정보교류가 가능하다. 모든 연령대에서 스마트폰을 널리 사용하여 삶의 만족도가 향상되었으면 한다.

• 대한물리의학회지
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• 제10권2호
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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.

• 한국수학교육학회지시리즈A:수학교육
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• 제53권2호
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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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• 제6권1호
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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.

• 한국항행학회논문지
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• 제14권6호
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• pp.970-974
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• 2010

IT 기술이 발전함에 따라 이동 중 서비스를 제공받고자 하는 요구를 충족하기 위하여 스마트폰 보급이 급증하고 있다. 스마트폰을 사용하는 사용자들은 올바른 사용으로 유용한 정보를 획득할 수 있으나, 올바르지 않은 사용을 하는 공격자는 악의적인 목적으로 사용하기 위해 타인의 개인 정보를 노출시키고 유포하여 다양한 피해를 발생시키고 있다. 이를 해결하기 위하여 다양한 서비스들이 개발되고 있으나, 공격들이 지능화됨에 따라 보안을 제공할 수 있는 방안이 필요한 실정이다. 본 논문에서는 안전한 스마트폰을 사용하기 위해서 개발 과정부터 안전한 제품을 보증하기 위한 정보보호제품 평가 및 보안 모듈에 대한 평가 제도들에 대하여 알아보고, 안전한 스마트폰 보안을 제공할 수 있는 방안에 대하여 제안한다.