• 한국정보시스템학회지:정보시스템연구
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• 제25권1호
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• pp.183-200
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• 2016

목적 많은 사용자들이 스마트폰을 바꾸고 있지만 대부분의 경우 새로운 스마트폰으로 바꾸는 대신 기존에 가지고 있는 스마트폰을 계속 사용하려는 경향이 있다. 브랜드 충성도와 전환비용은 기존의 스마트폰을 계속 사용하는 경향을 결정하는 요인이다. 다음과 같은 연구문제를 제기한다. "새로운 스마트폰을 구매하는데 있어서 브랜드 충성도와 전환비용의 역할은 무엇인가?" 방법론 기존 브랜드를 계속 사용하려는 경향을 고려하여 새로운 스마트폰 구매의도를 설명하기 위한 여섯 개의 가설을 제안했다. 연구모형은 177명의 대학생을 대상으로 LG의 G4 스마트폰을 구매의도에 대해 실증적 검증을 하였다. PLS에 의해 자료 분석을 한 결과 모든 가설이 통계적으로 지지받았다. 결과 첫째, 기존 스마트폰에 대한 브랜드 충성도와 전환비용은 새로운 스마트폰 구매에 영향을 미친다. 둘째, 브랜드 충성도는 전환비용과 상대적 이점의 관계에서 조절변수 역할을 한다. 셋째, 지각된 심미성과 가격 가치도 스마트폰 구매에 영향을 미친다.

• PNF and Movement
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• 제17권1호
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• pp.41-46
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• 2019

Purpose: Continuous use of a smartphone increases the angle of forward bending of the user's cervical vertebrae, causing pain in the shoulders and back, including the thorax, lumbar region, and vertebrae. Although there are many studies on changes in the cervical spine due to smartphone usage, the changes in the shoulders, thoracolumbar spine, and pelvic have rarely been compared. The purpose of this study is to investigate the change in the spinal segments, shoulders, and pelvic when using a smartphone with both hands while in the standing position. Methods: This study was conducted on 35 adults in their twenties. The selection criteria for the subjects were limited to those in a similar age group, thus excluding posture differences according to age, and to those who did not have specific diseases or pain in the spinal and musculoskeletal system for 12 months prior to the study. In this study, we used a 3D spinal diagnostic imaging system (Back Mapper, Frickenhausen) to compare the changing conditions in each vertebral segment before and during smartphone usage with both hands while in the standing position. Posture differences according to smartphone usage were compared using the paired t-test for the motion of each spinal segment. Results: This study showed that the thoracic and lumbar angle increased posteriorly during smartphone usage (p<0.05). In addition, the anterior rotation angle of the shoulder bone significantly increased, but no significant difference occurred in the pelvic region. Conclusion: Based on the results of this study, smartphone usage with both hands while in the standing position showed that the spine, as a whole, forms a kyphotic curve. Therefore, we propose to present a postural guideline for correct smartphone usage, considering the change in each vertebral segment.

• 대한통합의학회지
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• 제11권4호
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• pp.157-166
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• 2023

Purpose : The purposes of this study were to determine the relationships of communication skills with smartphone addiction and self-efficacy before clinical practice training among nursing students and to provide basic data for developing and verifying the effectiveness of an intervention program for improving nursing students' communication skills. Methods : This study targeted those who obtained consent to collect data explained the purpose and procedure of the study for the first and second graders of the nursing department at one university located in B city. The data collection period was from April 24 to May 13, 2023. A total of 207 questionnaire responses were included in the analysis. The collected data were analyzed using t-tests and analysis of variance in the SPSS/Win 230 program. The results were reported as real numbers, percentages, mean values, and standard deviations. The correlations between the variables were analyzed using the Pearson correlation coefficient. Results : Smartphone addiction according to the general characteristics of the study subjects showed significant differences in 'residence type' (F=2.91, p=.035) and 'average smartphone usage time' (F=20.15, p=.000). It seemed. self-efficacy was determined by 'age' (F=2.74, p=.045), 'subjective academic level' (F=7.71, p=.001), and 'average smartphone usage time' (F=3.96, p=.009) showed a significant difference. Communication skills showed a significant difference in 'average smartphone usage time' (F=3.83, p=.011). The correlation between the variables of the study subjects showed that self-efficacy was negatively correlated with smartphone addiction (r=-.42, p<.001), and communication ability was positively correlated with self-efficacy. It was found that (r=.55, p<.001). 15) Conclusion : On the basis of the study results, the higher the nursing students' smartphone addiction, the lower their self-efficacy, and the higher their communication ability, the higher their self-efficacy. Therefore, intervention research is necessary to develop interventions for preventing smartphone addiction and increasing communication ability among nursing students.

• 예술인문사회 융합 멀티미디어 논문지
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• 제8권6호
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• pp.835-844
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• 2018

최근 전 세계적으로 스마트폰(smartphone) 이용자 수가 늘어나면서 스마트폰으로 전자결제, 인터넷 사용, 금융결제 등 다양한 서비스를 사용하고 있으며, 이 외에도 스마트폰을 이용한 가전기기 제어, 자동차 제어 등을 위한 연구가 진행되고 있다. 이와 같이 스마트폰을 통해 이용자들이 좀 더 편리한 생활을 누릴 수 있게 되었으나 스마트폰 해킹을 통해 스마트폰 내 문자와 통화내용을 도청, 스파이 앱을 통한 위치추적, 스마트폰을 이용한 DDoS 공격, 악성 앱을 통해 소액결제 이용 시 특정 전화번호로 메시지가 수신되는 경우 해당 문자메시지를 원격지 서버로 전송하여 개인정보 등 유출 사례 등과 같은 위험이 역시 증가하고 있다. 따라서 본 논문에서는 우리가 실생활에서 사용하는 스마트폰을 통해 스마트폰 내·외부 환경적·물리적·콘텐츠(앱) 등으로 인해 발생되는 스마트폰의 위험요소를 정의하고 각 위험요소에 대한 보안방안 및 대응기법을 정의하여 스마트폰의 각 위험별 가장 효과적인 대응기법 및 CC평가와 같은 스마트폰 보안솔루션 평가 시 취약점 점검방법을 제시하고자 한다.

• 한국학교ㆍ지역보건교육학회지
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• 제20권3호
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• pp.15-27
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• 2019

Objectives: The purpose of this study is to investigate the effects on smartphone overdependence of out-of-school youths. Methods: This was a cross sectional study design using the out of school youth Panel Survey(2017). We conducted an empirical study consisting of 318 participants with using descriptive statistics, Pearson's correlation coefficients, hierarchical multiple regression analysis to identify factors influencing smartphone overdependence. Results: Smartphone overdependence correlated positively with depression and carrier barriers such as lack of career informations, career development anxiety and financial difficulties. The main factors of smartphone overdependence in adolescents out of school were depression (β = .22, p = .002), gender (β = .21, p <.001), future anxiety (β = .15, p = .0.0), subjective health status (β = .13, p = .028), smoking (β = .13, p = .032). Conclusion: Smartphone overdependence management programs for out-of-school youths should be included emotional and informational support to alleviate anxiety, fear of failing in one's career, as well as mental and psychological interventions to reduce level of depression.

• Journal of Information Technology Applications and Management
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• 제24권4호
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• pp.93-115
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• 2017

The ability of smartphones to facilitate various services like mobile banking, e-commerce and mobile payments has made them part of consumers' lives. Conjoint analysis (CA) is a marketing research approach used to assess how consumers' preferences for products or services develop. The potential applications of CA are numerous in consumer electronics, banking and insurance services, job selection and workplace loyalty, consumer packaged goods, and travel and tourism. Choice-Based Conjoint (CBC) analysis is the most commonly used CA approach in marketing research. The purpose of this study is to utilise CBC analysis to investigate the relative importance of smartphone attributes that influence consumer smartphone preference. An experiment was designed using Sawtooth CBC Software. 326 students attempted the online survey. Utility values were derived by Hierarchical Bayes (HB) estimation and used to explain consumers' smartphone preferences. All the six attributes used for the study were found to significantly influence smartphone preference. Smartphone brand was the most important, followed by the price, camera, RAM, battery life, and storage. This study is one of the first to use Sawtooth CBC analysis to assess consumer smartphone preference based on the six attributes. We provide implications for the development of new smartphones based on attributes.

• 한국전문물리치료학회지
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• 제25권3호
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• pp.27-38
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• 2018

Background: At present time, smartphones have become very popular and powerful devices, and smartphone applications with the good validity have been designed to assess human balance ability. Objects: The purpose of this study is to evaluate the feasibility of smartphone acceleration in the assessment of postural control ability for six different conditions. Methods: Twenty healthy college-aged individuals volunteered. Static balance ability was measured twice with one-day interval using smartphone application and 3D motion capture system under the six different conditions. Results: Dominant frequencies for each test condition did not show significant differences except for two conditions. The intra-rater correlation coefficient between the first and second tests showed high correlations in six conditions(r>.70, p<.05). Smartphone acceleration and the acceleration calculated from the 3D marker position data showed high correlation coefficient(r>.80, p<.001). Conclusion: Acceleration recorded from a smartphone could be useful assessment variables for balance test in the clinical field.

• 한국IT서비스학회지
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• 제18권3호
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• pp.1-15
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• 2019

Disadvantaged from disaster response training and disaster safety education who people are vulnerable to disasters when faced with disasters. The vulnerability of these disaster response will be linked to the desire for disaster information. Therefore, using smartphone to provide timely disaster information will be an effective disaster response service that enables disaster vulnerable people to avoid disaster efficiently. In particular, the importance of using smartphone as a part of the body will become more and more important in everyday situations when information is acquired through smartphone. In this study, Through a survey of traditional market traders, I can find out that the desire of elderly women, who are weak in disaster, to receive disaster information through smartphone text service is relatively strong. Based on the results of this study, I expect that the opportunity to improve disaster response capability through smartphone text service will be provided to elderly women who are weak in disaster.

• 가정∙방문간호학회지
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• 제25권3호
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• pp.191-203
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• 2018

Purpose: The purpose of this study is to investigate the problems experienced by Korean adolescents due to smartphone use and related factors. Methods: The subjects were 57,463 middle school and high school students nationwide as the 13th The Korea Youth Risk Behavior Web-Based Survey, 2017. Data were analyzed using means, standard deviations, and composite sample multiple logistic regression analysis. Results: This study confirms that negative experiences were related to general characteristics of sex, academic background, socio-economic level, residential area and form, academic performance, and parental education; health behavior characteristics of subjective health cognition, depression, and stress; and characteristics related to smartphone use. Smartphone usage time amd use of services were factors related to the problems experienced from using smartphones. Conclusion: Based on the results of this study, it is necessary to plan for the use of smartphones in consideration of physical and emotional health and to educate adolescents to promote social communication between family and friends. It is also necessary to develop and apply a smartphone use management program to maintain a balance between smartphone use, academic performance, and school life.

• 대한임베디드공학회논문지
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• 제9권5호
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• pp.277-283
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• 2014

In this paper, we propose a control system for synchronizing attitude between an Android smartphone and a mobile robot. The control system is comprised of a smartphone and a mobile robot. The smartphone transports its attitude to the mobile robot and receives the attitude of mobile robot through bluetooth communication. Further, the smartphone displays the mobile robot on the screen by using embedded camera, which can be used as a pseudo augmented reality. Comparing the received attitude data from smartphone, the mobile robot measures its attitude by an AHRS(attitude heading reference system) and controls its attitude. Experiments show that the synchronization performance of the proposed system is maintained in the error range of $1^{\circ}$.