• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.277-280
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• 2011

VoIP is a technology of voice communication, using the existing internet network which sends and receives voice packets. VoIP has an advantage that VoIP is cheaper than an existing telephony, and the tech is vitalized lately. But recently you can download Volp Application in the Market that have a vulnerability(Anyone Can Upload). This weakness is wrongfully used that People are downloaded by encouraging about malignant code is planted. Signal intercepts indicates from this case. and paralysis by DDoS Attack, bypass are charged for hacking. Judging from, security threat of VolP analysis and take countermeasures. In the thesis we analyze the VoIP security caused on 'Soft Phone' and 'Smart Phone', and figure out security policies and delineate those policies on the paper.

• International Area Studies Review
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• v.22 no.1
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• pp.141-159
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• 2018

The study aims to explore the factors that affect the value perception, satisfaction, and frequency of smart phone taxi applications in Shanghai, China, and commuters. According to a survey conducted on the actual use of taxi application, the majority of the customers responded that they have been using taxi apps for more than one or two years, and the results showed that they use taxi apps once or twice a week. It also showed that the actual use of taxi apps varies depending on their age and academic background. Among the value attributes of smart phone taxi applications, the respondents perceived ease of use as the highest at 4.41 points out of 5 point scale, while the risk perception was the lowest at 3.34 points. Finally, when social demographic characteristics and the nature of taxi app use were controlled, the value perception variables had a significant influence on taxi application satisfaction. The higher the perception of service quality, usefulness, and system usability, the higher the satisfaction levels were. In particular, the impact of perceived usefulness and system usability perception was high.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.11
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• pp.2419-2425
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• 2011

Presently SmartPhone users over the 15 million are expected to exceed 20 million people by the end of the year. The prevalence of SmartPhone has brought positive results with a new paradigm. But, It makes a result that SmartPhone user should concentrate on mobile device and interpersonal relationships are avoided. In this paper, we design and implement user network services that use a same application using located information based on android.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.10a
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• pp.535-538
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• 2011

Presently SmartPhone users over the 15 million are expected to exceed 20 million people by the end of the year. The prevalence of SmartPhone has brought positive results with a new paradigm. But, It makes a result that SmartPhone user should concentrate on mobile device and interpersonal relationships are avoided. In this paper, we design and implement user network services that use a same application using located infomation based on android.

• Journal of Korea Society of Digital Industry and Information Management
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• v.9 no.4
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• pp.127-134
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• 2013

While there are many services that can check current traffic condition and application program such as bus arrival alarm are developed, since it only provide simple alarm and check level of information, it is still insufficient in many senses. Therefore, the program that try to develop in this study is the system that predict arrival time to destination and inform the bus passengers by applying real time traffic information. The system developed related to this study is still very inadequate. In the system developed in this thesis, when the user input the current bus number and destination using smart-phone, relevant server acquire the bus route information from bus information DB, and analyze real time traffic information based on the information from traffic information DB, and inform customer of expected arrival time to destination. In this thesis, traffic congestion can be eased off and regular operation of public transportation can be improved with reliable destination arrival alarm. Also, it is considered that pattern of bus users can be analyzed by using these information, and analyzing average transport speed and time of public transportation, travel time depending on various situation can give a boost to study related to transportation information and its development.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.70
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• pp.81-107
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• 2016

Purpose : The purpose of this study is to find that Factors in the practical application of LISMB(Logistics Information System Practice Based) on S.P(Smartphone)' Characters. and take in the whole situation of LISMB on S.P' Characters by this research and it is clear from the findings that LISMB on S.P' Characters situations and distinctiveness. Research design, data, methodology : Research model and hypotheses have been developed based on literature review and working-level interview The collected data were analysed with structural equation modeling, examining the hypothesized relationships and mediating effect. Result : The results of research are as follows, First, LISMB on S.P' Characters has a positive effect on a precariousness of operation management. but That has no effect on a precariousness of general management. Second, Consign management and User non-cooperation has a mediating effect on relationships between LISMB on S.P' Characters and general management. Third, Old version system, User non-cooperation and Unskilled in equipment new system has a partly mediating effect on relationships between LISMB on S.P' Characters and operation management. Conclusion : Smart-phon Prevalence rates keeps increasing. Nevertheless, LISMB on S.P' Characters may no be used in Container transportation market. This problem are being blamed for hampering corporate activities and harbor logistics industry development. so we need new way to solve that problem.

• 한국정보교육학회:학술대회논문집
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• 2011.01a
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• pp.265-270
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• 2011

This paper is the study about application development for management obesity and personal health matters systematically based on Android smart phone system. Growing obesity problem for students organized by the lack of a device or program to manage at home has been favored as a serious problem. Currently developed smart phones has come into wide use by portable features and many applications. And to support populations of these features smart phones will be available for obesity management in your home without any equipment using. Accordingly, this paper is the study about application development for management obesity for growing students at home based on the latest smart phone platform Android.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.963-966
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• 2010

개인용 휴대전화는 다양한 형태로 발전 되어 왔다. 그 동안 국내 통신 시장은 피쳐폰이라고 불리는 단순 전화, 문자 위주의 서비스만을 제공하는 하드웨어 기반의 서비스가 대부분이었다. 몇 년 전부터 PDA와 전화 기능을 기반으로 한 하드웨어가 출시되기 시작하였으나 사용 및 운영의 불편함으로 인해 수요의 폭을 넓히지 못 하였고, 2007년 Apple사의 iPhone 출시를 기점으로 전 세계적으로 다양한 형태의 스마트 폰이 출시되기 시작하였다. 또한 휴대폰 공급 업자들이 제공하는 일방적인 서비스에 만족하지 않고 사용자가 원하는 방향에 필요한 컨텐츠를 다양하게 제공할 수 있는 소프트웨어 마켓의 등장으로 스마트 폰은 그 사용자 층이 매년 큰 폭으로 확대되고 있다. 최근 스마트폰은 글로벌 경기 침체 속에서도 13%대의 성장률(2009년 3/4분기)를 보이며 세계 휴대폰 시장의 중심으로 자리 잡고 있다. 또 사용자의 요구를 충족 시키기 위해서는 다양한 플랫폼의 개발자가 양성 되고 있으며 다양한 어플리케이션을 제공하기 위해 노력하고 있다. 본 논문에서는 다양한 플렛폼 기반의 개발 환경을 소개하고 향후 개발자들이 접목할 수 있는 개발 도구 및 응용 방법을 비교 분석함으로써 스마트폰을 기반으로 한 최적화 어플리케이션의 개발을 촉진 시키고자 한다.

• Journal of the Korean Association of Geographic Information Studies
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• v.14 no.4
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• pp.161-171
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• 2011

Most public organizations which charge for measuring or collecting environmental information provide web-based information services. In the case of Seoul, it is provided smart phone app for information services on region or district unit. However, there is no smart phone application for environment information services considering location-based services with the concept of personalization. The purpose of this study is to deign and implement a smart phone app for air environment and radioactive information services with these features. Hybrid type is adopted, so that several things are possible: access to a variety of devices by web languages, and N-Screen support is available. According as social needs with respect to more environmental information and their contents are increasing, this approach will be useful.

• Journal of the Institute of Electronics and Information Engineers
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• v.54 no.4
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• pp.35-43
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• 2017

In this paper, we propose indoor IoT monitoring system based on visible light communication using smart phone with attracting attentions in recent wireless communication. The main features and contributions of the proposed system developed in this paper are as follows. First, the actual data generated within indoor can be processed via the server by using only the visible light communication. Second, the collected data by using the visible light communication can be monitered by smart phone. Performance evaluation of the proposed system is performed under illumination of the normal fluorescent lamps. We first check successful transmission between transmitting module and receiving module of the data collection system. The monitoring system is tested according to the change of the degree of condensing and distance of the LED and the decoding success rate of the proposed smart phone application. We expect that the proposed system can be applied for indoor and outdoor IoT areas together.