• Journal of Internet Computing and Services
• /
• v.4 no.1
• /
• pp.9-17
• /
• 2003

Since cellular phone has come into wide use, the mobile advertisement has been considered as a new type of advertisement. In this paper, I proposed the system to make Images in various format so that users can make advertisement contents more easily. Also 1 proposed the advertisement on the VM application which can be connected to the sewer via wireless network.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.26 no.11C
• /
• pp.157-166
• /
• 2001

The sales of long-distance telephone market decreased every year according to increased mobile phone and Internet users. This paper researches trend of domestic long-distance telephone market, and suggests marketing and improving plan for long-distance telephone network providers. And we investigate the effects of the Internet phone on IP era for long-distance telephone service market. The results of this paper can be used for strategies for improving long-distance telephone market and service development on IP era.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.11 no.4
• /
• pp.171-174
• /
• 2011

In this paper, transformed IFA design is proposed to improve the antenna gain of GSM/DCS/PCS band. New antenna structure has been approved to be more convenient matching in the mobile phone terminal and increase gains and expansion bandwidth through the simulation and real measurement. According to measurement, it's shown 1.57dB higher average gain than conventional IFA.

• Journal of Korea Society of Industrial Information Systems
• /
• v.12 no.5
• /
• pp.120-132
• /
• 2007

The purpose of this study is to introduce the implementation of WML and WMLScript by using the Openwave WAP simulator. For this purpose, previous literature review was done on the studies about the structures of WAP systems, types of WAP Browsers, and development methods of WAP contents. Afterwards, I attempt to implement WML and WMLScript by using an openwave Phone simulator, openwave WAP simulator, openwave HTTP simulator and Nokia Mobile Internet Toolkit. Few studies have been completed on implementation of WMLScript and it's complex process. Therefore, this study explores the necessary implementation steps and develops an easier way to create and experiment mobile applications using WMLScript.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2013.11a
• /
• pp.368-371
• /
• 2013

자전거 인구가 증가함에 따라 4대강, 한강 등 10대 자전거 거점도시를 중심으로 인프라가 구축되고 있다. 이러한 인프라로 급속히 성장된 자전거 인구가 약 1,000만 명 에 이르지만, 이러한 유저간의 정보제공 및 정보공유를 뒷받침 해줄 복합적인 콘텐츠가 부족한 실정이다. 하여 본 연구에서는 정보기술로 급속하게 성장하고 있는 스마트폰과 SNS을 기반으로 하여 자전거 노선 공유, 거리 및 속도 분석, 자전거 모임 제공, 여행지 공유 등을 서로 공유하고 제공할 수 있는 자전거 문화 활성화 서비스를 구현하였다.

• Journal of KIISE:Information Networking
• /
• v.34 no.1
• /
• pp.16-26
• /
• 2007

It is well known that, in the near future, the lifetime of the IPv4 address space will be limited and available 32-bit IP network addresses will not be left my more. In order to solve such IPv4 address space problem in an effective way, the transition to the new version using IPv6 architecture is inevitably required. This paper presents the design and implementation of IPv4/IPv6 dual stack at the GSM Phone based on Linux Kernel 2.4 IPv6 Protocol Stack. It designs appropriately in GSM Phone environment and it is tested by a network of Linux IPv4/IPv6 dual stack on PPP. The test was processed with a test scenario and it was found that the results were successful.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.16 no.3
• /
• pp.187-201
• /
• 2016

The purpose of this study was to analyze the smart phone usage experience structure for college students. The phenomenology approach was used by conducting 4 times in-depth interviews with the 7 college students age between 20~23. Collected Data was analyzed by Giorgi's phenomenological method. There were 4 general structure descriptions and 28 themes. General structure descriptions were 'Dependence on smart phone', 'Phenomenon of smart phone usage', 'Results of smart phone usage' and 'Relationship between stress and smart phone'. Themes consisted of 'Ambivalence', 'Positive feelings for smart phones', 'Separation anxiety', 'Negative feelings for smart phones'. 'Dependent feelings for smart phones', 'A sense of unity with smart phones', 'Helpful for my life', 'Deeply involved with my life', 'Useful tool in my life', 'Study, communication, relaxation and health care', 'Maintain personal relationship', 'The most important thing in my life', 'Shallow relationship stress', 'Interference with personal relationship', 'Forming a negative relationship', 'Invasion of privacy', 'Forming a Incorrect relationship', 'Unwanted participation', 'No effort to improve relationship', 'Poor concentration', 'Interference with academic study', 'Study assistance', 'Limited help for study in depth', 'Shelter from the stress', 'Amplification of the stress', 'Obsessive focus', 'Feel separation for the reality' and 'Waste of time'. Smart phone usage make college students dependent on smart phones and had negative influence on both personal relationship and academic results. Usage of smart phone also amplified stress. Therefore we need fundamental principles on usage of smart phone and propose to build cultural etiquette that provides reasonable way to use smartphone.

• Journal of Digital Convergence
• /
• v.13 no.7
• /
• pp.177-182
• /
• 2015

In a MPC(Multi-Pulse Coding) using excitation source of voiced and unvoiced, it would be a distortion of voice waveform. This is caused by normalization of synthesis speech waveform of voiced in the process of restoration. To solve this problem, this paper present APC-MPC of amplitude-position compensation in a multi-pulses each pitch interval in order to reduce distortion of synthesis waveform. Also, I was implemented that the APC-MPC in coding system. And I evaluate the SNRseg of APC-MPC in 8kbps coding condition of convergence system. As a result, SNRseg of APC-MPC was 13.9dB for female voice and 14.3dB for male voice respectively. And so, I expect to be able to this method for cellular phone and smart phone using excitation source of low bit rate.

• The Journal of Information Systems
• /
• v.15 no.4
• /
• pp.189-209
• /
• 2006

The progress of mobile internet technologies has changed user access to information. The mobile internet allows to obtain contents and services from wireless networks via mobile devices. The purpose of this study is th find out important factors that influence on the customer purchase intention by mobile internet environment. Base on TAM(Technology Acceptance Model) and the latest literature, a comprehensive set of constructs and hypotheses were compiled with a methodology for testing them. We suggested five factors that effect purchase intention in mobile internet environment: Enjoyment Ease of use, Usefulness, Mobility, Trust To validate the research model, we collected data from cellular phone user using an online survey. The results of this study are as follows. First enjoyment ease of un, usefulness, and mobility had positive effects on trust. Second, Usefulness, ease of use, and trust had positive effects on purchase intention to use mobile internet. Third, enjoyment and mobility did not have positive effects on purchase intention to use mobile internet. Based on these results, we suggest marketing strategies.

• Information Systems Review
• /
• v.3 no.1
• /
• pp.83-101
• /
• 2001

Studies about wireless internet have been focused on technology issues and few studies were shown in the adoption of wireless internet services. This study uses Technology Acceptance Model in order to understand influencing factors in acceptance of wireless internet services. Reviewing by TAM related studies, this study regards the influencing factors as personal and social environmental dimensions in the case of wireless internet services, and these two factors are used. Two dependent variables-intention and current usage-are adopted for analyzing the effects of the two factors on two dependent variables via mediating variables. The results of this study show that age, frequency of mobile phone usage, occupation, and the recognition level of wireless internet services affected the intention and current usage of these services.