• 대한안전경영과학회지
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• 제15권2호
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• pp.113-120
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• 2013

This study was conducted to investigate the characteristics of smartphone usage and posture of users during using smartphone. A survey was conducted for 983 smartphone users to understand the association between smartphone usage and including subjective symptoms associated with musculoskeletal disorders. Main results from the survey were as follows; 1) 18.8% of the subjects experienced musculoskeletal symptoms at least at one of body parts. Specifically, 8.1%, 5.6%, 4.1%, and 11.3% of the subjects experienced musculoskeletal symptoms at neck, shoulder, elbow, and hand respectively, 2) The symptoms of musculoskeletal disorders were also associated with amount of text message and time for daily usage of smartphone. Specifically, relative risks of musculoskeletal disorders at hand/wrist/fingers in terms of "amount of text message" and "time for daily usage" for experienced user were 1.425 and 1.368 respectively to inexperienced user. This study identified 'amount of text message' and 'time for daily usage' as the major risk factors of smartphone usage in terms of musculoskeletal symptoms. The results of the study provided a good basis in order to remove or reduce the risks associated with musculoskeletal symptoms due to smartphone usage.

• 한국콘텐츠학회논문지
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• 제20권12호
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• pp.266-277
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• 2020

사용자의 편의성이 높아짐과 동시에 그만큼 스마트폰에 대한 개인 정보 유출 문제도 심각하게 대두되고 있다. 이미 언급하였듯이 전자금융관련 서비스, 개인 파일 저장 등의 기능을 제공하는데 있어서 필요한 사용자의 개인 정보가 모두 스마트폰 안에 저장되어 있기 때문에 스마트폰을 분실 하거나 도난당하였을 경우 사용자의 중요한 개인 정보가 노출될 수 있다. 이러한 개인 정보 보호를 위해 정부 및 통신 사업자는 스마트폰 잠금이나 초기화 서비스를 제공하고는 있지만 많은 허점과 문제점이 있다. 이에 본 논문에서는 사용자가 스마트폰을 분실 또는 도난당하였을 때 스마트폰에 저장되어 있는 사용자의 개인 정보를 유출하여 악의적으로 사용하는 것을 방지하고, 유심 칩(USIM Chip)을 제거하거나 변경한 후 사용하는 스마트폰은 자동으로 초기화하여 전화기 내에 저장되어 있는 사용자의 개인정보를 파기하는 애플리케이션을 개발하였다. 즉, 사용자가 스마트폰을 분실 또는 도난당하였을 때 사용자의 개인 정보를 악의적으로 사용하지 못하도록 하는 방안을 제시하고자 한다.

• 한국정보통신학회논문지
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• 제16권3호
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• pp.489-498
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• 2012

스마트폰의 일정 관리 어플리케이션은 모바일 환경에서도 효과적인 사용자 인터페이스와 높은 사용자 접근성을 바탕으로 널리 사용되고 있다. 하지만 빈번히 변경되는 사용자의 상태나 위치 등의 상황 정보를 고려하지 않기 때문에 변화된 상황을 반영한 일정관리를 지원하지 못하고 있는 실정이다. 본 논문에서는 사용자의 상황 정보를 수집하여 이에 따른 적합한 서비스를 능동적으로 제공하는 지능형 알림서비스를 제안한다. 또한 지능형 알림서비스를 기반으로, 스마트 일정 관리를 지원하는 스마트폰 어플리케이션을 개발한다. 지능형 알림서비스는 스마트폰의 GPS 센서를 이용하여, 위치나 일정 정보에 따른 사용자의 상태를 인지하고 변화된 정보를 바탕으로 사용자에게 능동적인 알림을 제공한다.

• 생물정신의학
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• 제21권4호
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• pp.161-167
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• 2014

Objectives This study aims to investigate possible associations between proneness toward smartphone addiction and certain psychopathological variables to evaluate the psychopathological meaning of smartphone addiction. Methods Questionnaires were assigned to 755 adults between September and November 2012. We used the Korean Smartphone Addiction Proneness Scale (SAPS), the Beck Depression Inventory (BDI), the Beck Anxiety Inventory (BAI), the Obsessive-Compulsive Inventory-Revised (OCI-R), and the Barratt Impulsivity Scale-11 (BIS-11). Subjects were classified into two groups according to the scores of the SAPS ; the addiction proneness group and the normal-user group. Results The addiction proneness group had significantly higher scores than the normal-user group in the BDI, BAI, OCI-R, and BIS-11. The scores of the SAPS were positively correlated with the scores of the BDI, BAI, OCI-R, and BIS-11. Using logistic regression analysis, smartphone addiction proneness showed a significant association with BIS-11. Conclusions The results of this study suggest that smartphone addiction proneness may be associated with depression, anxiety, obsessive-compulsive symptoms, and impulsivity. Furthermore, impulsivity could be a vulnerability marker for smartphone addiction proneness.

• 한국보건간호학회지
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• 제32권3호
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• pp.411-423
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• 2018

Purpose: This study was to form a healthy smartphone culture and serve as basic materials for developing smartphone addiction intervention program by understanding mental health and physical health of college students caused by smartphone addiction. Methods: The data collected from 261 college students at G and S city universities who understood the purpose of this study and consented to take part in the study were analyzed on mean, standard deviation, frequency, Chi square test and t-test using SPSS 20.0. Results: The result showed that the level of smartphone addiction was significantly different according to gender, age, type of college, satisfaction with college life and satisfaction with family life. The smartphone addiction risk group showed higher score in life stress, depression, social avoidance and distress than the general user group and the physical health was also higher in the risk group than the general user group. Conclusion: It is necessary to develop and apply customized intervention plan per each person's characteristics and level of addiction to prevent addiction and improve health condition from overuse of smartphone.

• 제어로봇시스템학회논문지
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• 제22권2호
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• pp.97-103
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• 2016

In this paper, a smartphone-controlled personal mobility system (PMS) with semi-autonomous navigation is developed. The proposed PMS moves to waypoints and then reaches the destination where the waypoints and destination are selected by the user using Google maps in a smartphone. The hardware environment consists of a GPS (Global Positioning System) in the smartphone and a compass sensor. In addtion, while it is moving in autonomous mode, the user can intervene and change the direction and speed of the PMS in order to avoid obstacles that may be encountered accidentally in a dynamic environment. That is why it is called "semi-autonomous navigation". Experimental results showed that the proposed PMS is effectively able to migrate to the waypoints and destination in both autonomous and manual modes.

• 한국멀티미디어학회논문지
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• 제24권3호
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• pp.440-447
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• 2021

Smartphones are currently being produced with similar functions, shapes, and software. The foldable smartphone is a product that dramatically changed the shape of the existing smartphone. Therefore, it affects the functions and software. In this paper, we analyze the potential security vulnerability of current mobile authentication methods by dividing them into two parts, security vulnerabilities of non-foldable smartphones, and security vulnerability that appears with the changed smartphone structure. According to the analysis result, the classic and current mobile user authentication methods appears to be easily affected by the smartphone display structure. Finally, we propose an appropriate authentication method as well as the concept of security measures for smartphones with foldable screen. Our method shows that it is more secure than the conventional authentication methods in foldable display smartphone.

• 한국멀티미디어학회논문지
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• 제21권5호
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• pp.583-591
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• 2018

With the development of ICT(Information and Communication Technology), the number of smart devices is rapidly increasing. LBS(Location Based Service) applications that provide user's location based service are used in various fields. There is also a growing demand for indoor precision positioning technology to provide seamless services. In this paper, we propose an indoor positioning system that estimates the location of a smartphone user. The proposed algorithm determines whether the received signal is LOS(Line-of-Sight) or NLOS(Non-Line of-Sight) in order to decrease multipath effect by the indoor environment. The proposed positioning algorithm is very simple and requires only the AP(Access Point) coordinates. In addition, it requires only two APs for estimating the location of a smartphone user. The proposed algorithm is a practically applicable technology without any additional hardware and kernel modification in the smartphone. In the experiment results, the reliability of the positioning system was found to be within 0.83 m.

• Journal of Information Technology Applications and Management
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• 제20권1호
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• pp.133-148
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• 2013

As network technologies evolve and so-called smart technologies appear, applications of smartphones are being applied in widespread areas. In general, the adoption of smartphones is different from the adoption of information systems. Thus, we tried to find out factors which may affect the user acceptance behavior. However, there have been some academic studies that analyzed the factors that affect user acceptance of smartphones, and their relationships. Under this academic background, we develop a model to examine how smartphones are accepted by users based on technology acceptance model. The theoretical model is validated through an online survey of smartphone users from two universities in Seoul, Korea. The results reveal that the users will have positive attitude towards adopting the smartphone when they perceive that the usage of smartphones is useful. We also find that the perceived usefulness of the smartphone is affected by the perceived ease of use and the media richness. The results also suggest that the perceived ease of use is determined by the self-efficacy whereas the intention to use smartphones is determined bv the perceived usefulness, the self-efficacy, and the attitude toward smartphnes' usage. Theoretical and practical implications are discussed.

• 유통과학연구
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• 제20권11호
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• pp.99-108
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• 2022

Purpose: The wide distribution of smartphones has changed life and user behavior. This phenomenon has both advantages and disadvantages for users. As smartphones become a part of our daily lives, smartphone addiction has recently become a social issue in many countries. This study explores factors that affect smartphone addiction and the consequences of addictive behaviors. Research design, data and methodology: Our model hypothesizes that four key factors determine addictive behavior: flow, enjoyment, preference for online social life, and escape reality. Commitment and compulsive use are mediating variables that connect key drivers and addictive results. Based on the SEM (structural equation model) analysis of 497 survey responses, these four driving factors each have a significant effect on the compulsive use of smartphones directly or indirectly; the compulsive use of smartphones directly influences the three results Results: We conducted a reliability and validity analysis, and the results were successful. In the hypothesis test, every path is accepted as expected at the significance level of 0.05. Conclusions: Among the four driving factors, escape reality is the vital factor influencing smartphone addiction and its consequences. And anxiety is the number one consequence influenced by the compulsive use of smartphones.