• Journal of the Korea Society of Computer and Information
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• 제22권8호
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• pp.33-39
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• 2017

In this paper, we propose a method which implements warning to drivers through real-time analysis of risky and unexpected driver and vehicle behavior using only a smartphone without using data from digital tachograph and vehicle internal sensors. We performed the evaluation of our system that demonstrates the effectiveness and usefulness of our method for risky and unexpected driver and vehicle behavior using three information such as vehicle speed, azimuth and GPS data which are acquired from a smartphone sensors. We confirmed the results and developed the smartphone application for validate and conducted simulation using actual driving data. This novel functionality of the smartphone application enhances drivers' situational awareness, increasing safety and effectiveness of driving.

• Journal of Family Resource Management and Policy Review
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• 제18권1호
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• pp.47-68
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• 2014

This study investigated the relationship between smartphone addiction propensities and leisure satisfaction according to leisure time constraints among university students and attempted to promote an effective and desirable leisure culture. The main findings were as follows: First, leisure time constraints showed differences in terms of the withdrawal factors, overall smartphone addiction propensities, and leisure satisfaction; self-efficacy showed significant differences in terms of withdrawal and overall smartphone addiction propensities; and control showed a significant difference in leisure satisfaction. Second, in the case of university students, it was revealed that regardless of leisure constraints, as disturbance of daily living and tolerance are higher, leisure satisfaction is lower in those with smartphone addiction propensities.

• The Journal of Information Systems
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• 제23권4호
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• pp.147-168
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• 2014

Consumer's switching behavior from incumbent smartphone to new one can be explained by not merely rational assessment but also affective aspects like aesthetic or pleasure and emotional points like attachment. but, in information system field, researches on affective.emotional factors relatively were insufficient and researches which focus on the perspective of the consumer were more scarcity. consumer's attachment to current smartphone brand and perceived aesthetic on new one would influence rational evaluation to switch or not. Therefore, this study investigates relationship between emotional factors on current smartphone and assessment of new one, in turn, we empirically analyzes purchase intention of the consumer. In order to prove the validity of the hypotheses, this study was applied longitudinal study and then conduct a survey of 212 smartphone users. The analysis results by Partial Least Square (PLS) approach showed that all hypotheses in this study were statistically supported.

• Journal of Korea Society of Digital Industry and Information Management
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• 제11권4호
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• pp.143-154
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• 2015

This study aims to evaluate smartphone gaming controllers. Diffusion of smartphone makes its users to play smartphone games in ease and comfort and its built-in sensors deliver new gaming experience to the users. Based on the concept how the controller system is important, the current research also implies the importance of customizing service which gives users a selection to deploy a controller. To explore the interaction effect of controllers and customizing on interactivity, flow, usability, attitude, and intention, the research constructs 3(gyroscope, wheel, and button controllers) by 2(default and customizing setting) experimental design and forty college students played Gameloft's Asphalt 8: Airborne in a within subject design. The results showed that interaction effect and customizing main effect were not found, but controller main effect was statistically significant. Button controller is superior to those other two in more detail. It implies that it is still not useful to play new types of gaming controller, and a customizing service. It suggests that smartphone games should more focus on improving optimal user experience with built-in sensor controllers.

• Journal of Korea Society of Digital Industry and Information Management
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• 제9권1호
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• pp.189-202
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• 2013

Recently, Smartphone is not only used as a communication medium, but also provide mobile service tool enabling game, internet surfing, DMB, navigation services, and so on. A lot of smartphone's applications are using for our daily lives. The purpose of this study was analyze affecting factors such as innovativeness, Self-Efficacy and Social-Influence on adoption behavior of smartphone application. This survey was carried out with university students. Data were obtained from 293 students who have smartphone. To Find difference among variables, exploratory factor analysis, t-test and multiple regression was carried out with collected data. Result shows that the distinction of sex is significantly difference in innovativeness and self-efficacy. And self-efficacy and social influence are significantly affect to smartpjone adoption. Therefore, self-efficacy and social influence are import consider factors to reconsider marketing strategy for smartphone business.

• International Journal of Contents
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• 제11권3호
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• pp.1-6
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• 2015

This study presents an examination of the effects of the sub-factors of both self-control and school adjustment on smartphone addiction among a sample of elementary school students. The study is comprised of 93 5^th-grade students from x elementary school located in Seoul, Korea. A descriptive analysis, Pearson's correlation, and multiple regression analysis were performed, and the following two study results are presented: 1) Among the sub-factors of self-control, instant gratification positively predicts smartphone addiction. 2) Among the sub-factors of school adjustment, a student's adherence to school rules negatively predicts smartphone addiction. Based on these results, the implications for preventing smartphone addiction among elementary-school students are discussed.

• Journal of Korean Society of Industrial and Systems Engineering
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• 제36권3호
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• pp.79-86
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• 2013

Recently, the number of smartphone users has skyrocketed because of a plenty of useful services that smartphone applications provide. In the Information Systems (IS) literature, however, there has been little understanding about the effects of the service quality of smatphone applications on user satisfaction and loyalty. Thereby, this study examined 1) the effects of the service quality of smartphone applications on users beliefs, perceived usefulness and easiness and 2) the effects of the user beliefs as mediating variables on users' attitude, satisfaction, and loyalty. A survey was conducted and SEM was employed to analyze the data. The results showed that the service quality of smartphone applications affect users' attitude, satisfaction, and loyalty through the mediating variables.

• International journal of advanced smart convergence
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• 제10권4호
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• pp.30-37
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• 2021

Touch sensor interface has become the most useful input device in a smartphone. Unlike keypad/keyboard interfaces used in electronic dictionaries and feature phones, smartphone's touch interfaces allow for the recognition of various gestures that represent distinct features of each application's input. In this paper, we analyze application-specific input patterns that appear in smartphone's touch interfaces. Specifically, we capture touch input patterns from various Android applications, and analyze them. Based on this analysis, we observe a certain unique characteristics of application's touch input patterns. This can be utilized in various useful areas like user authentications, prevention of executing application by illegal users, or digital forensic based on logged touch patterns.

• Journal of the Semiconductor & Display Technology
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• 제20권1호
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• pp.7-11
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• 2021

The electrocardiogram(ECG) and heart rates are essential for diagnosing heart disease. However, conventional portable ECG devices are possible to only measure heart rates or have limitations in how and where they are measured. In this paper, a portable ECG system in which ECG waveforms and heart rates are displayed on smartphone screens is developed. A smartphone is used as display equipment instead of a computer screen for continuous monitoring. The developed ECG system filters and amplifies detected analog ECG signals. Next, it converts the amplified analog ECG signals into digital signals, then transmits to the smartphone via Bluetooth communication. This ECG system can display and store biomedical signals on a smartphone through the application. As a result, the waveform and heart rates of the developed portable ECG system has been confirmed to be similar to those of existing medical devices.

• Korean Journal of Childcare and Education
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• 제11권2호
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• pp.109-129
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• 2015

This study is to examine the effects of smartphone addiction on the mothers' parenting efficacy and parenting attitude. This study consisted of 203 smartphone using mothers of preschoolers in Gyonggi-do. The measurements included smartphone addiction scale(National Information Society Agency, 2011), the parenting efficacy scale(Choi & Chung, 2001), and the parenting attitude scale(Bae, 2005). Theses analyses were included in the Pearson correlation coefficient, the T-test, and the Hierarchical regression analysis. The findings indicated that the younger mothers showed higher levels of smartphone addiction. The results of smartphone addiction subscales on parenting efficacy indicated that the disturbance of adaptive functioning was related with general parenting ability, healthy parenting ability, communication ability, and learning guidance ability. The results of smartphone addiction subscales on parenting attitude showed that the disturbance of adaptive functioning was positively related with rejective parenting attitude and virtual life orientation was negatively associated with affective and autonomous parenting attitude. These findings can emphasize parents' appropriate smartphone use, and be useful resources to develop and utilize the programs of positive parenting efficacy and parenting attitude.