• The Journal of Information Systems
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• v.23 no.4
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• pp.49-74
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• 2014

The introduction of smartphone caused the most revolutionary change in the domestic telecommunications market after the digital revolution. However, due to the saturation of the local market, it is expected to post negative growth in 2016 and the sales of national communication carriers is in stasis. Thus, the smartphone industry is starting to shift its marketing efforts to secure the silver generation who still has room for increase in the rate of smartphone usage. As the silver generation has physical limitations and differences in needs, the marketing strategy based on the smartphone utilization is not appropriate. This study suggests the new silver generation, who has high income level and similar characteristics to the younger generation, as the new customer segment for smartphone. We analyze the effects of the major variables of UTAUT on smartphone use, as well as examine how these relationships differ between the new silver and the net generation. We verified the hypotheses using a survey with 309 smartphone users. The research findings supported the hypotheses regarding the effects of performance expectancy, effort expectancy and facilitating conditions on smartphone use, but did not support the hypothesis on the effect of social influence. The result of the group comparisons showed that both generation have similar characteristics on innovativeness and cognitive absorption, but the moderating effect of age on performance expectancy, effort expectancy and use is stronger in conjunction with the new silver generation. The study results are expected to be used in establishing a marketing strategy for the new silver generation.

• Journal of Digital Convergence
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• v.15 no.9
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• pp.79-85
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• 2017

The purpose of this study was to investigate utilization behaviors of smartphones while walking that are increasing recently and to examine the effects of smartphone usage patterns on human factors of pedestrian safety. In order to understand the motives and actual conditions of pedestrians' use of smart phones, a online questionnaire survey was conducted on people in their 20~30s who use smartphones. As a result, 98.6% of the respondents had experience using smartphones while walking. After performing the survey by extracting 17 uses the synchronization elements in the prior studies was extracted with two factors from the factor analysis. Particularly, respondents whose motivation to use smartphones was 'pandemic' were analyzed to have an influence on the risk of accident due to use of smartphones among human factors of pedestrian safety.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.43 no.2
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• pp.56-64
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• 2020

This paper is a follow up to the previous study which reveals that smartphone users are divided into three subcategories according to their usage characteristics. In this paper, these groups are called as 'general', 'entertainment', and 'work-assistant', taking into account their respective characteristics. The 'general' is a group whose smartphone usage characteristics are not focused on a specific purpose, the 'entertainment' is focused on music, internet, SNS, picture, and e-banking, and the 'work-assistant' is on work, GPS, diary. Inter-relation between the importance and satisfaction for the purchase determinants to the groups is investigated. In addition, Kano analysis of quality attributes is also performed, which includes quality type, satisfaction/dissatisfaction index, and PCSI (Potential Customer Satisfaction Improvement) index. The analysis result are as follows. Firstly, inter-relation between importance and satisfaction differs by user group. 'Internet', 'Ease of use', and 'Performance' purchase determinants are evaluated as competitive determinants in 'work-assistant' user group. Secondly Kano quality types of quality characteristics also differs by user group. 'Application' was classified as an attractive (A) types to 'entertainment' group and so on. 'Internet' 'Failure/Bug', 'Touch response rate' and 'Charging' are located in 'Nice' Region of S-PCSI Diagram and have to be considered as strategic quality characteristics. The results of this study is expected to give some helps in establishing a customer tailored quality strategy.

• Journal of the Korea Convergence Society
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• v.8 no.8
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• pp.177-183
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• 2017

This study is a descriptive study to investigate the influence factors on smartphone overdependenceon in male middle school students. A questionnaire survey was conducted on 174 male middle school students about their smartphone overdependence, stress, ego - resilience, and use of smartphone by function. In results, 29.9% (potential risk group 23.6%, high risk group 6.3%) of the male middle school students were the smartphone overdependency risk group. A higher smartphone overdependency was associated with the higher the smartphone usage time per day, the higher the stress level, the higher the grade, and the lower the ego-resilience level. This requires the involvement of appropriate stress coping styles to overcome excessive stress situations. And the development and implementation of an intervention program that increases the level of ego-resilience can be expected to have an effect of controlling the smartphone use time as well as the intervention effect on stress coping.

• Journal of the Korean Society of Marine Environment & Safety
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• v.23 no.2
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• pp.131-138
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• 2017

Lately, Internet-based vessels have begun to appear at sea with the development of ICT. Thereby crews have gained easy Internet access through increased smartphone portability. However, the side effects of smartphone use while on watch, have not been studied seriously despite being a reality. In this study, simulation experiments were carried out using a Ship Handling Simulator in order to distinguish the risks of using a smartphone while on watch. Proximity Evaluation, Control Evaluation, Subjective Evaluation and Situation Awareness to the dangerous situation were used to quantify risk during simulation, and analysis results were compared with cases when using and not using a smartphone. It was found that the degree of risk increased between 1.3 to 3 times given smartphone use. Consequently, this paper represents foundation for the restriction of smartphone use and proposes smartphone usage guideline for ship navigation.

• Journal of Korean Physical Therapy Science
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• v.30 no.3
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• pp.23-30
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• 2023

Background: Flexion of cervical and lumbar joints is required when viewing a smartphone screen. Thus, these joints are overused, together with the surrounding joints and muscles. Long-term use of smartphones will cause changes in cervical and lumbar posture. The effect on forward head posture will vary, depending on the angle of cervical flexion start position in relation to the smartphone. This study investigated how forward head posture changes over time when using a smartphone at 20° and 40° cervical flexion start positions. Design: Cross-sectional study. Methods: Twenty-five subjects with a forward head posture angle of 35° or less participated in the study. A Forward Head Posture app on the participants' smartphones measured forward head posture 5 and 10 minutes after watching videos on their smartphones. Cervical range of motion was used to set a smartphone watching start posture of 20° and 40° of cervical flexion. Results: There was no significant difference in forward head posture, irrespective of cervical flexion start position, but the angle of forward head posture increased more at cervical flexion of 40° than at cervical flexion of 20°. There was no significant difference in what according to smartphone video viewing times, but the angle of forward head posture increased over time. Conclusion: An increase in forward head posture over time with smartphone usage poses a potential risk of neck and shoulder pain. Therefore, smartphone users should avoid prolonged screen time.

• The Journal of Information Systems
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• v.22 no.1
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• pp.1-27
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• 2013

The advancement of information and communication technology have brought the increase and the diversification of the digitalized information, which can be shared at any time from any place. Especially, with the recent spread of smartphone usage, the amount and the diversity of information have increased to amounts that are difficult to quantify. Within such an era of accelerated accumulation and diversification of digitalized information, the informatization of universities is becoming a critical factor for institutional advancement. Thus, universities are developing smartphone applications to provide easily accessible administration services, and support the information needs of each administration process by keeping a relationship with students from admission to post-graduation. This research systematically defines a university smartphone application, distinguishes its system quality factors, and studies the effects they have on satisfaction, intention of reuse, and intention of electronic word-of-mouth. The results showed that the security factor of system quality did not have a significant effect on satisfaction. The responsiveness and the empathy factors of service quality did not show a significant effect on satisfaction. Moreover, it was found that a higher user satisfaction for smartphone applications has a significant influence on intention of reuse and on the intention of electronic word-of-mouth.

• International Journal of Contents
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• v.11 no.1
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• pp.31-40
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• 2015

This paper primarily intends to explore whether smartphones accelerate the customer education paradox. Smartphone usage is becoming a mainstream habit, and it is changing people's shopping experience and conventional practices, hence presenting new challenges to the market. A smartphone affects customers strongly when they are trying to choose a product/service among a variety of options, and making purchase decisions. With smartphones bringing such changes and challenges to the market, especially to the companies and stores, it is important to understand market trends in order to retain the loyalty of existing customers as well as to attract new buyers. Therefore, companies and stores should offer enhanced and better technical service quality, along with the use of tools such as QR codes. Further, mobile based websites would offer a suitable approach in assisting customers using smartphones to obtain better information of greater value. The results of this study imply that there is an opportunity for organizations to design various methods of imparting customer education by using smartphones, such as loading applications on a smartphone that lead to more information with good quality and present real benefits regarding the products/services.

• Journal of Digital Contents Society
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• v.18 no.6
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• pp.1079-1089
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• 2017

As a result of the development of information and communication technology and the negative phenomenon of using smart devices including smart phones, many people are stressed. In this paper, we examine the effect of independent variables(mobile use ability, technical limit, speed of change, popularity) and control variables(manual service) on technostresses, which is derived from previous studies conducted from the negative viewpoint of existing information technology. For empirical analysis, empirical data were collected from a total of 206 individuals, and hypothesis tests were conducted using AMOS 22.0. In addition, by the qualitative research, we have examined smartphone usage and the technostress of smartphone usage. Focus group interviews were conducted with 24 ordinary people who purchased and used smartphones in order to verify the user's response to the smartphone user manual service.

• The Journal of the Korea Contents Association
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• v.19 no.1
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• pp.648-659
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• 2019

The social network services have spread rapidly with new issues in terms of the security. The purpose of this study is to longitudinally verify the influence of relationships among online security, social network service, and smartphone expense. The analyses were conducted on panel data of SNS users from 2015 to 2017 based on the SEM methodologies. The results indicated that anxiety of online security had an effect on the SNS usage. In addition, The results showed that anxiety of online security and SNS usage had a significant influence on the smartphone expenses. This study could provide useful guidelines for researchers and company managers, and an opportunity to develop an understanding of social network trends.