• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.608-611
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• 2012

본 논문에서는 모바일 디바이스가 가지고 있는 다양한 자원 제약성과 복잡한 기능의 어플리케이션의 설치와 운영의 어려움을 극복하기 위해 모바일 클라우드 기반의 에이전트 모델을 설계하였다. 본 논문에서 제안하는 소프트웨어 아키텍쳐는 모바일 디바이스의 단점을 극복하고 그 활용성을 극대화하기 위해 모바일 클라우드 서비스를 기반으로 일부 혹은 상당 부분의 기능이 클라우드 노드의 에이전트 형태로 구현되어 서버 측에 설치 운영되고, 사용자의 모바일 디바이스에 설치된 클라이언트 어플리케이션은 이 서비스를 호출 및 제어하여 사용한다. 이렇게 클라우드 노드에서 목표 어플리케이션을 실행함으로 모바일 디바이스가 가지는 여러 가지 제약성은 상당히 해소 될 수 있다.

• 한국컴퓨터정보학회논문지
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• 제24권1호
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• pp.121-128
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• 2019

An Internet of Things(IoT) technology which provides intelligent services by combining context-awareness based intelligences, inter-communication is made of between things and things or between things and person through the network connected with intelligent things is spreading rapidly. Especially as this technology is converged into smart device, mobile, cloud, big data technologies, it is applied into various domains. Therefore, this is different from existing Web or Mobile Application. New types of IoT applications are emerging by adapting IoT into Web or mobile. Because IoT application is not only focused on software but also considering hardware or things aspect, there are limitations existing development process. Existing development processes don't consider analysis and design techniques considering both hardware and things. We propose not only a meta-model for development process which can support IoT application's development but also meta-models for main activities in this paper. Especially we define modeling elements by using UML's extension mechanisms, provide development process, and suggest design techniques how to apply those elements into IoT application's modeling phase. Because there are many types of IoT application's type, we propose an Android and Arduino-based on IoT application as a case study. We expect that proposed technique can be applied into many of various IoT application development and design with a form of flexible and extensible as well as main functionalities or elements are more concretely described. As a result, it brings IoT application's flexibility and the effect of quality improvement.

• Journal of Communications and Networks
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• 제5권3호
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• pp.240-248
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• 2003

This paper analyzes mobile agent performance in network management compared to the client-server model used in the Simple Network Management Protocol (SNMP). Prototypes of an application that gathers MIB-II (Management Information Base-II) variables have been created and tested on a LAN. After acquiring implementation parameters related to network management and to the mobile agent infrastructure, simulation results have been obtained on large topologies similar in shape to the Internet. Response time results show that mobile agents perform better than SNMP when the number of managed elements ranges between two specific limits, an inferior bound and a superior one, determined by the number of messages that pass through a backbone and by the mobile agent size which grows along with MIB-II variables collected on network elements. The results also show that a significant improvement is achieved when the mobile agent returns or sends data to the management station after visiting a fixed number of nodes.

• 한국전자통신학회논문지
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• 제7권5호
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• pp.1145-1151
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• 2012

최근 스마트폰 보급이 확대되고 기술이 발전함에 따라 오프라인 현장에서 언제 어디서나 온라인 정보를 활용하여 실시간 의사소통과 업무처리를 할 수 있는 시스템 요구가 증가하고 있다. 본 논문은 공동주택 및 각종 시설물 하자관리와 유지관리 업무에 적용될 수 있는 안드로이드 기반의 모바일 어플리케이션을 이용한 실시간 시설물 유지관리 시스템 모델을 제시하였다. 제안하는 시스템은 시설물 유지관리를 위한 제반 과정의 시스템화를 기초로 하여 모바일 오피스 구현이 가능한 웹/모바일 통합관리 시스템 개발을 목표로 하였다. 또한 모바일 시스템 개발 시 요구되는 기술적 보안체계도 분석하여 시스템에 구현하였다.

• International Journal of Control, Automation, and Systems
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• 제6권1호
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• pp.86-100
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• 2008

Most of the previously employed dynamic modeling approaches, including Natural Orthogonal Complement Algorithm, have limitations on their application to the mobile robot, specifically at singular configurations. Also, in their dynamic modeling of mobile robots, wheel dynamics is usually ignored assuming that its dynamic effect is negligibly small. As a remedy for this, a singularity-free operational space dynamic modeling approach based on Lagrange's form of the D' Alembert principle is proposed, and the singularity-free characteristic of the proposed dynamic modeling is discussed in the process of analytical derivation of the proposed dynamic model. Then an accurate dynamic model taking into account the wheel dynamics of the omni-directional mobile robot is derived, and through simulation it is manifested that the effect of the wheel dynamics on the whole dynamic model of the mobile robot may not be negligible, but rather in some cases it is significantly large, possibly affecting the operational performances of dynamic model-based control algorithms. Lastly, the importance of its accurate dynamic model is further illustrated through impulse analysis and its simulation for the mobile robot.

• Journal of Information Processing Systems
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• 제18권5호
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• pp.650-664
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• 2022

Mobile applications can be easily downloaded and installed via markets. However, malware and malicious applications containing unwanted advertisements exist in these application markets. Therefore, smartphone users install applications with reference to the application review to avoid such malicious applications. An application review typically comprises contents for evaluation; however, a false review with a specific purpose can be included. Such false reviews are known as fake reviews, and they can be generated using artificial intelligence (AI)-based text-generating models. Recently, AI-based text-generating models have been developed rapidly and demonstrate high-quality generated texts. Herein, we analyze the features of fake reviews generated from Generative Pre-Training-2 (GPT-2), an AI-based text-generating model and create a model to detect those fake reviews. First, we collect a real human-written application review from Kaggle. Subsequently, we identify features of the fake review using natural language processing and statistical analysis. Next, we generate fake review detection models using five types of machine-learning models trained using identified features. In terms of the performances of the fake review detection models, we achieved average F1-scores of 0.738, 0.723, and 0.730 for the fake review, real review, and overall classifications, respectively.

• 한국IT서비스학회지
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• 제13권4호
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• pp.325-340
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• 2014

Mobile payment system using NFC attracted attention as the mobile payment market grows due to the fast diffusion of smart phones. However, non NFC mobile payment recently appeared because of the slow growth of infrastructure for NFC. With advent of Non NFC mobile payment applications, mobile payment industry is in developing trend. Non NFC mobile payment revitalizes the market by overcoming the limit of NFC with the smart applications using bar code and QR code payment, and providing various discounts, membership benefits and payment information. Therefore, this paper analyzed the intention of continuous use with the quality of mobile payment application based on the information system success model. Three categories of factors which are system quality, service quality, and information quality were used. We verified the significance of the factors affecting the intension of continuous use. mainly, quality of information was considered as an important factor of continuous Intention to Use. Also, unlike previous NFC, it was found that in Non-NFC, compatibility might not be as important factor. Moreover, we suggest a marketing strategy of companies for mobile payment industry which focus on information quality. and future research directions for non NFC payment market.

• Asia pacific journal of information systems
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• 제28권4호
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• pp.290-307
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• 2018

In this research, we study the impact of the factors that predict consumer loyalty of mobile payments and mobile wallets usage in Thailand. We developed a research model based upon previous findings where we propose and examine four constructs of personal innovativeness, consumer attitudes, consumer satisfaction and loyalty. In general, all of the hypotheses were supported by variables related to consumer loyalty with mobile wallet usage. Personal innovativeness analyzed due to its potential mediation effect on loyalty, both from attitudes and from satisfaction. It was found that personal innovativeness was a mediator construct in predicting consumer loyalty. The overall model provides value to the mobile payment and mobile wallet application providers in term of improving service efficiency and business strategies to secure Thai consumer loyalty.

• 인간식물환경학회지
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• 제22권1호
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• pp.75-89
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• 2019

This study aimed to examine the current status of mobile applications for garden design and extract valuable contents for the development of garden design programs for future reference. Mobile applications released in Korean or English on Google Play App Market as of July, 2018 were analyzed in this study (1 application in Korea and 14 applications overseas). The purposes of this study are to analyze the components of the programs for those who actually intend to create a garden and to use it as a resource for developing mobile applications for garden design. Thus, program components and contents were analyzed for garden design applications based on real space (1 application in Korea and 3 applications overseas) that could actually help users. The analysis of mobile applications for garden design shows that while overseas garden programs are rapidly developing in various fields, the number of garden design mobile applications developed in Korea and the amount of information platforms are significantly insufficient. This study suggested flowchart for garden design mobile applications based on the analysis results of existing garden design application. This flowchart includes a series of processes from planning/designing gardens to purchasing plants and facilities to constructing/maintaining gardens for users who intend to design and create a real garden. Furthermore, this study proposed a freemium business model based on 4R(Reflex, Reality, Real place, Real communication) marketing strategies for mobile applications. Realistic experiences can be increased through graphics and information about gardens and plants provided in this study, and location-based information services as well as the creation of systems connected with vendors and suppliers of products related to gardens can induce consumers' purchasing behaviors. Additionally PR activities through various garden-related cultural events are expected to attract more users.

• 한국콘텐츠학회논문지
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• 제22권9호
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• pp.1-18
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• 2022

본 연구는 문화예술 광고 플랫폼 앱을 중심으로 앱의 사용자 경험을 비판적 관점에서 고찰하였다. 이는 관련 앱의 방향성을 검토하고 사용성을 높일 수 있는 대안적 접근 방안을 제언하고자 하는 목적을 지닌다. 본 연구는 '무비프리' 앱을 선정한 후 휴리스틱 검사법을 활용하여 심층적으로 탐색하였으며 그중 허니콤 모델을 재구성하여 해당 사례의 유용성·사용성·매력성·검색성·접근성·신뢰성을 분석하였다. 첫째, 가격 요소에 대한 사용자의 호의적 반응이 콘텐츠와 인터페이스의 유용성과는 큰 상관관계가 없기에 독창적 가치를 통해 시장에서 경쟁우위를 점해야 한다. 둘째, 소비자 경로 프로세스 분석 결과 사용자들은 앱에 대해 인지한 첫 순간부터 서비스와 연속적으로 교감하는 것으로 나타났다. 셋째, 사용자가 앱의 이용에 불편을 느끼면 사용자와 앱 상호간의 장기적 관계를 구축하는 데 실패요인으로 작용한다. 마지막으로 양질의 문화예술 콘텐츠를 이용할 수 있으리라는 사용자의 기대를 충족시킬 수 있도록 브랜드의 정체성을 명확하게 수립하고 제품 인지도 향상 전략을 꾀해야 한다.