• Journal of Digital Convergence
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• v.13 no.10
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• pp.471-482
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• 2015

This study aimed to demonstrate the complex and structural relationships between (a) the purposes of using mobile phones, and (b) the levels of mobile phone dependency and depressive symptoms among elementary school students. We analyzed data from the 3rd Korean Children and Youth Panel Survey using structural modeling. Results showed the level of mobile phone usage for contacting family members negatively affected the mobile phone dependency. However, the levels of mobile phone usage for contacting friends and personal entertainment positively influenced the mobile phone dependency. Mobile phone dependency positively affected depressive symptoms. Mobile phone dependency partially mediated the relationship between the level of mobile phone usage for contacting family members and depressive symptoms. Mobile phone dependency fully mediated two relationships: (1) between the level of mobile phone usage for contacting friends and depressive symptoms and (2) between the level of mobile phone usage for personal entertainment and depressive symptoms.

• Venture DIGEST
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• s.121
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• pp.28-31
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• 2008

우리나라의 이동전화 사업이 7월 1일로 성년의 날을 맞았다. 이날은 지난 1988년 7월 1일 SK텔레콤의 전신인 한국이동통신이 미국 AT&T의 AMPS(Advanced Mobile Phone Service) 방식의 개인용 이동전화 서비스를 처음 시작한 지 꼬박 20년이 되는 날이다. 이제까지 새로운 기술 개발과 서비스를 위해 도전하며 세계 최초의 기록을 세워왔던 수많은 벤처의 기록과 휴대전화와 함께 해온 우리 일상을 담아본다.

• Child Health Nursing Research
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• v.19 no.1
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• pp.29-38
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• 2013

Purpose: This study was done to develop a cell phone addiction scale for Korean parents of young children, and to evaluate the reliability and validity of the developed scale. Methods: The scale was developed through construction of a conceptual framework, generation of initial items, verification of content validity, selection of secondary items, preliminary study, and extraction of final items. Participants were 465 parents and 178 children. Data were analyzed using item analysis, factor analysis, criterion related validity, internal consistency, and split-half reliability. Results: Twenty items were categorized into three factors explaining 60.3% of total variance. Factors were named as withdrawal - 4 items, loss of control - 9 items, and persistence - 7 items. Scores for the scale were significantly correlated with self-control, impulsiveness, cell phone use, and cell phone addiction of children as measured by a scale for Korean children. Cronbach's alpha coefficient for the 20 items was .94, and Guttman coefficient was .87. Scale scores identified children as high risk users, at risk users, or average users by standard scores. Conclusion: The results suggest that the cell phone addiction scale for Korean parents is a reliable and valid instrument to measure cell phone addiction in young children.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.557-562
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• 2006

휴대전화는 용도적인 측면에서 PC와 유사해 지고 있으며 네트워크 기술의 발달로 다 수의 파일들을 다룰 수 있을 것으로 전망되고 있다. 그러나 휴대전화는 PC와는 다른UI특징을 가지고 있으며 이러한 차이는 다 수 파일의 관리나 이와 관련된 복잡한 태스크 수행 시 문제점이 예상된다. 본 연구는 사용자의 선험적 지식을 바탕으로 휴대전화의 UI특징에 적합한 효용성 있는 파일관리 UI가 무엇인지 알아보는 것에 목적이 있다. 이에 따라 사용자의 선험적 지식이 있는 윈도우탐색기의 사용행태 조사를 통해 자주 수행하는 태스크와 메타포어를 분석하여 휴대전화와 비교, 문제점 과 해결방안을 도출하였다. 이를 바탕으로 프로토타입을 제작하여 사용자 평가를 통해 가로방향의 페이지 분할 방식과 * 또는 #키와의 중복을 활용한 단축키 제공, 일괄적인 옵션 메뉴의 제공은 사용자가 익숙해져 있는 4방향 네비게이션 키와 12 숫자 키패드를 입력장치로 사용하는 휴대전화에서 파일관리 시 효용성이 있음을 알 수 있었다.

• 정보화사회
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• s.89
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• pp.16-21
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• 1995

보행자전용 휴대전화(일명 : 시티폰)가 서울 여의도 지역에서 선보여 세간에 화제가 되고 있다. 비록 시범서비스중이지만 편리성, 저렴한 비용, 높은 보안성으로 인해 조만간 이동통신시장을 위협할 다크호스로 떠오를 것으로 전망된다. 이에 도입배경, 특징, 해외동향 그리고 향후 계획을 중심으로 시티폰서비스의 세계에 접근해 본다.

• The Journal of the Korea Contents Association
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• v.14 no.6
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• pp.200-210
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• 2014

Purpose: The purpose of this study was done to investigate the relationship between self esteem, impulsive behavior and mental health among adolescents who were cellular phone addiction and those who were not. Methods: The data were collected using questionnaire from the sample of 239 middle school students. The data were collected from April 8 to 19, 2013. Data were analyzed using frequencies, means, ${\chi}^2$-test, Fisher's exact test, t-test and logistic regression analysis with SPSS 20.0. Results: Firstly, Significant differences were found for grade, sex, period, buying motives, the number of the messages/day, use, phone bill, callers between students who were cellular phone addiction and those who were not. Secondly, Self esteem for the cellular phone addiction were lower than for those in the non-addiction group, and impulsive behavior and mental health were higher. Thirdly, The logistic regression analysis revealed that self esteem, non-planning impulsiveness, mental health total, grade, sex, period, and the number of the messages/day significantly associated with being a cellular phone addiction. Conclusions: The result of this study offer basic data for the development of intervention programs to prevent adolescents cellular phone addiction.

• 한국HCI학회:학술대회논문집
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• 2008.02a
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• pp.120-124
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• 2008

This is a case study of a wellbeing feature for mobile phone. Though it is not related communication feature which is major functionality in mobile phone, it becomes a popular feature by users who want to manage private information and life style. To make a feature for practical usage, Personas is used for development and decision. A late 20 years old lady persona is developed to provide context and background information. Based on the persona, usage scenarios and needed contents were designed. From this case study, suggest a design guideline for personalization features in perspective of user experience design.

• Korean Journal of Cognitive Science
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• v.22 no.1
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• pp.1-18
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• 2011

With rapid spread of handheld devices like cellular or smart phones, a short message service (SMS) comes on the public as a communication means. SMS is very cheap and can be easily written down on the storage in order not to forget it, hence it is widely used to inform schedules (time and place). In this paper, we develop a system for automatically registering schedules extracted from SMS text messages. SMS text messages are very short and concise, but include a lot of Internet words like slangs and abbreviations. These have made it difficult to extract information on schedules from them. Also handheld devices have some limitations on computing power and storage and then applying general natural language processing modules like morphological analysis to the devices are somewhat hard. To relax these burdens, we extract schedule informations from SMS messages using machine learning methods like condition random field (CRF) without using any language processing modules and register the informations on the schedule management system of handheld devices. Our proposed automatic schedule registration system has implemented on Samsung Omnia phone for experiments.

• Broadcasting and Media Magazine
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• v.9 no.2
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• pp.13-20
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• 2004

위성DMB는 개인을 대상으로 하여 위성을 통해 방송콘텐츠를 송출하고 가입자는 옥외 또는 이동 중에 개인용 휴대 단말기, 휴대전화 겸용 단말기 또는 차량용 단말기를 통하여 언제 어디서나 방송 서비스를 수신할 수 있는 새로운 이용행태의 위성방송 서비스이며 기존의 방송서비스의 시간적/공간적 한계를 넘어서는 멀티미디어 서비스이다. (중략)

• Proceedings of the KAIS Fall Conference
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• 2006.05a
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• pp.265-270
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• 2006

최근의 휴대전화 단말기(Cellular Phone, CP)는 IT기술을 적극적으로 접목하여 다양한 기능을 부가하고 있으나, 단순한 IT기술의 접목만으로는 CP기술 발전의 한계를 드러내고 있다. 이러한 상황에서 휴대전화 단말기에 개인용 로봇(Personal Robot)을 결합하여 로봇의 개인 서비스 기능과 엔터테인먼트 기능을 갖춘 개인로봇형 휴대전화단말기인 RCP(Robotic Cellular Phone)의 개념을 도입한 연구가 진행되고 있다. 본 논문에서는 RCP세부기술 중 하나인 $RCP^{Interaction}$에 주목한 연구로, RCP의 촉각 및 청각자극환경에서 인간이 느끼는 감성을 생체신호를 활용하여 객관적으로 감성을 평가할 수 있는 시스템에 대한 연구를 수행 하였다.