• Journal of Digital Convergence
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• v.13 no.11
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• pp.63-70
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• 2015

The fierce competition of mobile messenger services (MMS) allows MMS providers to perform a variety of marketing campaigns and business activities to enhance user loyalty. The applied model in this study is based on Oliver's four-stage loyalty model for the formation processes of user loyalty about MMS. While social network formation and service quality are the key elements of cognitive loyalty, positive mood and negative mood are the key components of affective loyalty in the study. Conative loyalty is captured by commitment. The data of 249 KakaoTalk users at least five times for three months is empirically tested based on the research model using partial least squares. The analysis of test identifies that positive feeling and commitment significantly influences behavioral loyalty, whereas negative feeling plays a significant role in inhibiting behavioral loyalty. The findings of this study show that social network formation and service quality significantly affect only positive feeling. The analysis results reveal several insights that can help MMS managers understand the roles of cognitive, affective, conative, and behavioral loyalty in the MMS environment.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.07a
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• pp.297-300
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• 2022

본 연구는 메타버스의 정보전달 효과를 확인하기 위해 대면 대화 대비 메타버스의 정보전달 효용성을 비교 분석하였다. 대면 대화, 메타버스, 화상회의, 메신저앱 플랫폼을 독립변수로 하여 정보전달 효용성을 측정하였으며 설문조사로 구성된 1차 실험과 사후 행동 관찰을 실시한 2차 실험으로 나누어 실험하였다. 1차 실험에서는 유의미한 차이가 발견되지 않았으나 실험을 마치고 수 일이 지난 후 예고없이 실시한 2차 실험에서는 대면 대화와 화상회의가 높은 수치를 기록한 데에 반해 메타버스와 메신저앱은 유의미하게 낮은 수치를 기록하였다. 메타버스가 코로나시대에 사회적 공간제약을 극복하는 대체재로 쓰였으나 자유로운 대면 활동이 다시 가능해진다면 대면대화 대비 정보전달 효용성이 떨어질 수 있으므로 메타버스의 장단점을 충분히 이해하고 활용해야 할 것이다.

• The Journal of the Korea Contents Association
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• v.17 no.9
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• pp.184-191
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• 2017

Smartphone has become a part of many people's daily lives. The mobile messenger function on the smartphone in particular is the most frequently used services. The mobile communication tool in the age of digital media can be classified into two big categories: text messages and emoticons, the non-verbal expression tool of one's emotions. This thesis has studied the mobile communications made by the non-verbal tool of emoticons. The history of emoticons traces back to the text-based emoticon created by Scott Fahlman, from which graphical emoticons were developed and the sound and animation effects have been added. Many people use emoticons and diverse companies are developing the tool. In this study, the representative emoticon development case of Line Co., Ltd. is analyzed to see the concept, types, development process, collaborations and merchandising of the emoticons. Based on the case of Line, the development orientation and direction of domestic emoticons will be discussed to be culture contents.

• Digital Contents
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• no.11 s.126
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• pp.124-129
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• 2003

이동통신사업자인 KTF가 지난달 16일 국내 무선인터넷 표준 플랫폼인 WIPI 상용서비스를 시작하면서 본격적인 WIPI 시대가 개막됐다. 이번 KTF의 WIPI 서비스 개시는 국내 콘텐츠 제공업체와 단말기 제조업체의 중복투자 방지와 콘텐츠, 단말기 개발 용이, 가입자들에 제공하는 타사 가입자와의 네트워크 게임, 채팅, 메신저 등과 같은 양방향 네트워크 서비스 가능 등의 측면에서 향후 국내 모바일 콘텐츠 시장에 적지 않은 변화를 가져올 전망이다. 향후 콘텐츠 시장의 흐름을 전망하기 이전에 WIPI의 개요와 특징, 앞으로의 과제 등에 대해 살펴봤다.

• Journal of Digital Convergence
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• v.12 no.2
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• pp.243-248
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• 2014

The demand for messenger service goes on growing rapidly with widespread use of smartphones. Generally, the smartphone messenger provides group communication functions in which users can make the group and communicate with each other. In the mobile meeting, the attendees can participate in the meeting with use of smartphone messengers wherever they are. To make the mobile meeting put to practical use, the mobility and privacy should be ensured to attendees. To satisfy the mobility requirement, the user which is not belong to the group members should not be able to participate in the meeting. To ensure the privacy requirement, the attendees should have not to repudiate the meeting results. In this study, the mobile meeting authentication scheme is proposed which provides mobility and privacy. The proposed scheme consists of meeting group creation, group key generation, group signature and verification protocols. All attendees should have to participate in the signature verification because it is based on the challenge-response type protocol. Thus, it's not possible to collude with malicious attendees to change the meeting results.

• Journal of Digital Convergence
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• v.10 no.10
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• pp.147-154
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• 2012

I made an analysis on the case of Kakao Talk, which is Korean top mobile instant messaging service, to find the growth potential of Korean Social Network Service in the global market. First, I found that unlike the PC messenger services, Kakao Talk is not only unlimited in mobile IM service provider but also has evolving into a social network service firm. Second, attempts with a variety of social services such as photo-based Kakao Story and Marketing Platform for Mobile Game, Kakao Talk successfully landed as a SNS company. Third, with 'Plus Friends' Service, soon-to-be launched Avatar and App Market Service, Kakao Talk is evolving into social media and social platforms. The big success of Kakao Talk in Korean market is expanding and reproducing into Japanese and Southeast Asian markets through the 'Line' serviced by NHN. Line is applying the proven success stories of Kakao Talk to the Japanese and Southeast Asian markets. It means that Kakao and Line, both are mobile IM services, have raised the possibility of success in the global SNS market although online web-based SNS Cyworld has failed in the global market.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.910-913
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• 2012

통신기술의 발달과 스마트 폰의 급격한 보급으로 인하여 모바일 환경은 음성 데이터 기반의 환경에서 인터넷 데이터 기반의 환경으로 급격히 변화되었다. 이로 인하여 음성 서비스 처리 위주의 음성 데이터 기반 모바일 환경은 대용량 동영상 서비스, 인터넷, 메신저 등의 유선 네트워크 환경과 같은 다양한 서비스가 요구되는 환경으로 변화되었다. 이러한 환경 변화로 인하여 모바일 네트워크는 무선 네트워크상의 취약점 뿐 만 아니라 유선환경의 네트워크 취약점을 동시에 지니는 환경으로 변화되었고, 이로 인한 다양한 새로운 취약점들이 부각되기 시작하였다. 본 논문에서는 이와 같이 새롭게 부각되고 있는 모바일 Packet Switched Core Network(PSCN) 환경에서 Service Provider(SP)의 Service Recover로 인해 유발되는 Paging Table Denial of Service(PT-DoS)를 효율적으로 제어하기 위한 Delay Access Control(DAC) 기반의 QoS를 이용한 방법을 설계/구현하였다. 그리고 실험을 통해, PT-DoS를 차단하여 PSCN 공격을 미연에 방지하는 효과를 확인하였다.

• The Journal of the Korea Contents Association
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• v.16 no.6
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• pp.135-150
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• 2016

This study aims to investigate how perceived interactivity between the mobile messenger application and its user gives rise to user's enjoyment and continuous usage intention. Perceived interactivity was assumed to be formed by the combination of control, share, and responsiveness in light of the previous studies. The relations between perceived interactivity, enjoyment, and usage intention are hypothesized on the basis of the pleasure-arousal-dominance emotional state model, the theory of reasoned action, and the theory of planned behavior. Survey data were collected from 481 mobile messenger users in Korea and China. In order to test hypotheses, structural equation modeling analyses were conducted. As a result, perceived interactivity concerning connectedness and responsiveness not only positively affected enjoyment, but also had a significant effect on usage intention. However, while control positively influenced usage intention, it was not significantly related to enjoyment. In addition, there was a positive relation between enjoyment and usage intention. Incidentally, multi-group analysis was conducted to explore the differences between Korean and Chinese users. The findings would provide managerial implications for mobile messenger corporations on causal effects of perceived interactivity and the differences of the path coefficients between in Korea and China.

• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.129-140
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• 2015

The objective of this study is mainly to examine factors affecting utilization of graphical emoticons in the environment of mobile messenger. For this purpose, this research identified several determinants including demographic variables that have influences on utilization of graphical emoticons by an overview of prior research on Big 5 model and Uses and Gratification (U & G). An online survey was employed to collect data, and hierarchical regression analysis was used for data analysis. The results showed that females and younger respondents have higher utilization of graphical emoticons than males and the older. The findings also showed that extraversion as personal traits has influences on the utilization. And they indicated that people increase their utilization of graphical emoticons when they want to communicate with others efficiently and succinctly, and to follow the trend. The practical and theoretical implications of the findings in this study are also discussed.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.05b
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• pp.923-926
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• 2003

인터넷 환경은 고정된 위치에서 사용하는 형태에서 이동하면서 사용하는 형태로 변화하고 있다. PDA 는 올해부터 CDMA 통신 모듈을 탑재한 PDA 폰과 무선랜 기능을 갖춘 이른바 '컨버전스 PDA'의 등장이 본격화할 것으로 보인다. 주요 PDA 업체들은 이미 CDMA 모듈을 장착한 PDA 폰과 무선랜 PDA를 주력 제품으로 내세우고 있다. 이러한 환경에서 VoIP 서비스, 메신저 서비스, 전자칠판을 이용하여 데이터를 공유, 전송하는 등의 공동작업 서비스 등 PDA 중심의 모바일 협동작업 서비스가 가장 유용한 서비스중의 하나로 부각될 것이다. 본문에서는 이러한 모바일 협동작업 서비스를 제공할 수 있는 서버에 요구사항을 정의하고 본문에서 채택한 SIP/SIMPLE 표준에 대하여 설명한 후 이를 기반으로 개발한 모바일 협동 작업 서버시스템에 대한 특징들을 설명한다.