• Journal of the Ergonomics Society of Korea
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• v.23 no.2
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• pp.105-120
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• 2004

With the new technology and the popularization of mobile phone. the functions and designs of mobile phone have been varied rapidly. However. based on the user's level of familiarity on mobile phone function and knowledge of information technology. the using behaviors of mobile phone. especially between the young users who are well acquainted with the latest function and technology and the over middle-aged users who are relatively not. would be quite different. A survey was conducted to investigate the various using behaviors of mobile phone in different age groups. The total number of six hundred and sixty-seven people from age seventeen to sixty participated in this study. The participants were divided into young group (age between 17 to 29) and the over middle-aged group (age between 40 to 60) to compare the difference group considered design. price. and function of the mobile phone as three important factors. on the other hand. the over middle-aged group considered quality of communication. price and ease of use as three important factors. All the respondents of the young group know how to use the text messaging function. however for the over middle-aged group. 40% of the respondents knows how to use the text messaging function. The over middle-aged group seemed mainly use the mobile phone for voice communication. however the young group had a tendency to communicate each other with short text message rather than through voice conversation. Twenty percentage of young group responded that they had an experience of pain or discomfort at the thumb. the thenar eminence area. or carpus area during pushing the mobile phone keypad. The excessive frequent use of keypad may cause the risk of repetitive strain injury (RSI). The results of this study could provide important information to understand the way of using mobile phone in different age groups. and also could be used to design and market the mobile phone.

• Korean Parent-Child Health Journal
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• v.14 no.2
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• pp.76-83
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• 2011

Purpose: The purpose of this study is to compare the mother's rearing attitude and communication between mobile phone addiction group and non-addiction group in middle school students. Methods: A cross-sectional descriptive study was performed with 574 students from 3 middle schools (1 boy school, 1 girl school, 1 coeducation school) at G-city in Gangwon Province. The data was collected from the 10th to 24th of July in 2010. Statistical analysis of the results was carried out by means, frequencies, chi-square, t-test and multiple regression with SPSS/WIN 18.0 program. Results: There were significant differences in mobile phone addiction group and non-addiction group in regard to sex, school year, grades, mother' age, purpose of mobile phone use, activity after school, phone bill per month. Also There were significant differences in mother's rearing attitude and mother's communication between two groups. Conclusion: Mobile phone addiction among students is not serious, however, possibility of becoming an addict still remains. This study suggests that we have to educate them about proper mobile phone use in advance to prevent them from becoming a mobile phone addict in early stage. Therefore, we need to develop an educational program to prevent mobile phone addiction.

• Proceeding of EDISON Challenge
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• 2015.03a
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• pp.496-499
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• 2015

The objective of the study is to develop selfie sticks to enhance portability and prevent error of pushing mobile phone button. The main target of selfie sticks is women and the size of selfie sticks is too big to put it in their bag. Also when people put mobile phone in a selfie stick, people push its button easily. Sometimes mobile phone is turned off or the volume is controlled because of pushing its button. The researcher focused on designing a solution that enhances portability and preventing error of pushing the button. The researcher understood structure of selfie stick. It consists of a mobile phone supporter and a length adjuster. The researcher designed the mobile phone supporter for enhancing portability and the length adjuster for preventing to push the mobile phone. The researcher designed a part which connects a mobile phone supporter with a length adjuster and made selfie stick fold. Also, sponges are partly put on the mobile supporter. It can reduce situation of pushing the mobile phone button. The selfie stick design from the study has an opportunity to distinguish using the product and carrying it and have people use the selfie stick conveniently.

• Journal of the Korea Society of Computer and Information
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• v.24 no.8
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• pp.51-58
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• 2019

In this paper, we propose to characteristics of mobile phone dance live broadcast platform and the second-generation technology acceptance model TAM2, this paper established the user acceptance model of mobile phone dance live broadcast platform, aiming to study the influencing factors of users' acceptance on mobile phone dance live broadcast platform. Based on the empirical analysis of user survey, the model is validated, and the relationship between variables in the model is clarified. It is also confirmed that human-computer interaction, scene interaction, relationship interaction and other factors will affect the user's acceptance on mobile phone dance live broadcast platform. At the same time, based on the relationship among variables obtained in the research, this paper tries to analyze how the variables affect each other based on the actual practice of mobile phone dance live broadcast platform. In addition, the video design strategy and marketing strategy for further development of mobile phone dance live broadcast platform are given to help the platform and dance creators to carry out better promotion on the mobile side. In the end, this paper summarizes the shortcomings of this study and points out further research directions in the future, providing a reference for researchers in the field of mobile phone dance live broadcast platform acceptance.

• Korean Journal of Childcare and Education
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• v.13 no.6
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• pp.111-126
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• 2017

Objective: The purpose of this study is to investigate the moderating role of Ego-Resilience between Peer Attachment and Mobile Phone Dependency in late adolescence. Methods: The participants were 2056 third year high school adolescents (1,041 boys and 1,015 girls) from the Korea Youth Panel Study (KYPS), a national representative of Korean Children and adolescence. Hierarchical Regression was used for data analysis. Results: First, the correlation between peer attachment, ego-resilience and mobile phone dependency were all significant. Second, ego-resilience takes the role of moderator for mobile phone dependency. In detail, ego-resilience relieves the mobile phone dependency caused by 'peer relationships' or 'conflict in peer relationships. Conclusion/Implications: Ego-resilience was found to control the relationship between peer attachment and mobile phone dependency. Therefore, in order to lower the dependence of mobile phones in adolescents with low peer attachment, a program that can enhance ego-resilience is needed.

• Korean Journal of Child Studies
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• v.38 no.2
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• pp.93-105
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• 2017

Objective: This study aimed to investigate the trajectories of mobile phone use with reference to its purposes, and to examine the effects of gender and interpersonal factors on the same in early adolescents. Methods: Latent growth modeling was used with a sample of 2,378 early adolescents from Grade 4 to 8. Data from the Korean Children and Youth Panel Survey conducted by the National Youth Policy Institute were used. Results: In boys and girls, overtime, the level of mobile phone use for communicating with family decreased, while that for communicating with friends increased. Level of mobile phone use for entertainment increased across time in boys; however, in girls, it increased from Grade 4 to 6 and decreased thereafter, until Grade 8. Gender was associated with the changes of mobile phone use according to the purpose of the same. Positive parenting, negative parenting, relationships with peers, and relationships with teachers predicted changes in mobile phone use for communicating with friends. Conclusion: These findings suggest that the processes involved in the trajectories of mobile phone use in early adolescence operate differently based on the purposes of the same. Additionally, the present results show that interpersonal factors are highly associated with mobile phone use for communicating with friends.

• Journal of the Ergonomics Society of Korea
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• v.27 no.1
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• pp.29-35
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• 2008

An estimated 1 billion mobile phone were sold globally in the year 2006. In Korea, people watch television 3.17 hours in a day. Television isn't what it used to be. Digital TV provides both interactivity and high definition. Mobile phone also transferred from 2G to 3G or 3.5G. This means the complexity of TV and mobile phone is increased, design of user interface is more difficult. Unlike the personal computer industry, TV and mobile phone industries have no standard user interface. A comparative study for user interface between TV and mobile phone is studied. User, task, system are analyzed in requirement analysis. User interface model and interaction are also analyzed between TV and mobile phone. This study provides some insights for user interface design. First, the UI designer have to consider another products because one user using one product at the same time using another products. Experience for one product affects that for another product. Second, TV and mobile phone show very similar pattern, especially interaction task and input interaction. Third, there are not sometimes optimized experience between service operator and device manufacturer. Cooperative design between them is required.

• Environmental Analysis Health and Toxicology
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• v.28
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• pp.18.1-18.8
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• 2013

Objectives As public concern on possible harmful effects of mobile phone in children has been raised, information of epidemiological characteristics of mobile phone use in children and adolescents will be essential for public health policy. Methods Using three databases (n=21,693) collected from 2008 to 2011, we examined characteristics of mobile phone ownership and use, and socioeconomic positions (SEP) in Korean children and adolescents. Results The ownership rate and the amount of mobile phone use were higher in females than males, in higher school grades than lower grades, and at 2011 than 2008. The average age of first mobile phone ownership was shown to decrease from 12.5 years in currently high school students to 8.4 years in currently elementary school students at 2011. More than 90% of children in the 5th grade owned a mobile phone. More children owned a mobile phone in lower SEP communities than in higher SEP. Children with parents educated less than those with parents educated more were more likely to own and use mobile phone. Conclusions Considering the epidemiological characteristics of mobile phone use, precautionary measures to prevent unnecessary exposure to mobile phones are needed in children and adolescents.

• Journal of Digital Convergence
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• v.3 no.2
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• pp.59-71
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• 2005

Nowadays, it is not unusual to buy and sell goods, service and information through the internet. As a result of rapid development of Information Technology(IT), business through the internet can be done without time Limitations, place restrictions and product limitations. However, internet shopping has been restricted a lot due to the need for physical connections to the internet in order to search for information and order what we want, and this is one of the biggest problems to the busy people of the 21st century. Therefore it is very natural to use mobile phones to do shopping through wireless internet easily and conveniently whilst on the move. The purpose of this research is to find out characteristics of mobile phone users in UK, Japan and Korea and 1) main aims of the mobile phone use, 2) reasons for ease of use of mobile phones, 3) favourite types of a mobile phone, 4) psychological stability of mobile phone users, 5) problems of mobile phone use, 6) purchase goods/services via mobile phone in the future. The research method used is questionnaire survey The research results will suggest how to take actions to promote mobile commerce in the future.

• Proceedings of the Society of Korea Industrial and System Engineering Conference
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• 2002.05a
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• pp.279-284
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• 2002

Nowadays, due to the popularization of mobile phone, the functions and using manners of mobile phone have been varied. According to Korea National Statistical Office, the numbers of domestic mobile phone user were 30 million at the end of March 2002. A survey was conducted to investigate the various using manners of mobile phone, especially the young ones from 15 to 28 years old. Two hundred and sixty people participated in this study. According to the result of this study, text messaging was one of the major functions of the mobile phone for the young people. Also, continuous and repetitive use of small key pad of mobile phone for text messaging could cause the repetitive strain injury on hand, especially fingers.