• Journal of Information Technology Applications and Management
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• 제17권4호
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• pp.83-105
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• 2010

Smartphone services seem to be appealing to people worldwide and show rapid growth in mobile service market. Based on the theoretical framework like attachment theory and self-congruity theory, we developed the research model and proposed six hypotheses. An analysis of 113 smartphone service users found that continued use intention in smartphone services is affected by uses' attachment to the service. We also found that the attachment is significantly increased by self-congruity, customization, and perceived usefulness. Our aim was to gain insight into ways of creating an environment that facilitating continued use intention of smartphone services. This study has important implications for academic researchers and practitioners who seek to understand why smartphone service users continuously use their smart phone services. Other practical implications of these findings and future research implications are also discussed.

• 스마트미디어저널
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• 제5권3호
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• pp.9-16
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• 2016

사물인터넷 기술을 이용한 서비스 형태는 셀 수 없이 많으며, 현재도 여러 기관에서 다양한 서비스를 제공하기 위해 새로운 기술이나 프로토콜을 만들어 내고 있다. 본 논문은 사물인터넷 서비스 접근제어를 위한 시스템에서 효율적인 서비스 제공을 위한 리소스 서비스 모델을 설계하고 구현한다. 사용자가 접근하고자 하는 리소스 서비스를 LCRS(Left Child-Right Sibling) 트리를 이용하여 모델링하고, 리소스 서비스 토큰을 이용하여 서비스에 대한 접근 제어를 수행할 수 있다.

• 한국빅데이터학회지
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• 제8권1호
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• pp.83-97
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• 2023

프로젝트의 평가란 프로젝트의 진행상황과 결과물을 평가하는 과정이다. 스마트시티 프로젝트들은 시스템 구성요소별(인프라, 서비스, 플랫폼)로 프로젝트가 나뉘기도 하고, 여러 가지 서비스별로 프로젝트들이 동시에 진행되기도 한다. 또한 추가 프로젝트를 통하여 서비스들이 개발되고 확장되기도 한다. 이렇게 여러 가지 프로젝트들이 복합적으로 진행되는 스마트시티가 목표 및 전략에 맞추어 진행되기 위해서는 프로젝트를 수행하는 과정에서 주기적인 프로젝트 평가가 필요하다. 본 논문이 제안한 스마트시티 프로젝트 평가체계는 스마트시티의 기획, 설계, 구축 및 운영의 전 단계에서 발생하는 프로젝트에 대해서 반드시 고려해야 할 다양한 요소를 반영하여 종합적이고 객관적인 지표를 제공하도록 설계되었다. 평가체계로부터 도출된 지표는 의사결정자가 스마트시티 프로젝트 개발 방향을 결정하는데 사용될 수 있다. 또한 프로젝트의 종료 이전에도 프로젝트의 성과를 중간 평가하고 이로부터 얻은 피드백을 반영할 수 있도록 설계하였다. 본 연구가 제안한 스마트시티 프로젝트 평가체계의 적용 방법을 소개하기 위해 인천경제자유구역청(IFEZ)의 스마트시티 프로젝트 사례에 개발된 평가체계를 적용하였다. 또한 평가결과를 바탕으로 스마트시티 프로젝트 항목별 개선효과를 극대화할 수 있는 항목을 제시함으로써 스마트시티 프로젝트 추진 방향을 제시하였다. 여러 가지 프로젝트들이 복합적으로 진행되는 스마트시티 프로젝트의 특성을 반영한 스마트시티 프로젝트 평가체계를 활용함으로써 스마트시티 프로젝트의 종합적인 계획 및 관리가 가능할 것이며, 프로젝트의 우선적인 개선 요소를 파악하는 데 본 연구가 참고가 될 것이다.

• 한국IT서비스학회지
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• 제17권3호
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• pp.139-156
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• 2018

Smart tolling, which improved the drawbacks of the existing high-pass system, was developed and built through the Smart Highway R & D project in 2007. In order to successfully introduce and spread Smart Tolling, it is need to analyze factors that affected by intent to use. This study conducted research based on literature studies and empirical studies, and developed a research model to analyze factors affecting the users' intention of smart tolling system based on technology acceptance model (TAM) and value based acceptance model. The main variables of the research model are service characteristics (convenience, reliability), technical characteristics (flexibility, stability), environmental characteristics (switching cost, effectiveness of policy) and intention to use. To test the hypotheses set in this study, frequency analysis, exploratory factor analysis, and confirmatory factor analysis were performed using the SPSS 22.0 program statistical package and AMOSS 18.0. The convenience and reliability presented by service characteristics did not affect the intention to use of smart tolling service.

• Journal of information and communication convergence engineering
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• 제9권1호
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• pp.1-5
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• 2011

Everyday, technology is evolved in many different disciplines. Computer and smart devices revolution take part of the evolved technology that continuously promising new features. Moreover, social networks services recently become widely popular, which most people in the world become a social-network-fond. In addition to the revolution of the evolved technology and social networks services, ubiquitousness is taking significant part in our daily lives. Although, there are many e-learning systems already existed, which use Internet technology along with a Web technology to provide education in various ways, in despite of that, there is no such existing system exploits the usefulness of smart devices along with the legacy of the online social networks besides the power of the ubiquitous computing technology. Therefore, we propose a smart device application, which fills the gap that has been missing in the recent contemporary era. It is an application that runs on smart devices particularly Smartphone devices; we call our system “Smart Device based Social E-learning System(SDES)”. We have preliminary implemented our system on Android OS. In this paper, we intentionally propose the system in order to ease the way people learn, to provide interactive accessibility in our system, and to utilize the advanced technology more wisely.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권1호
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• pp.64-83
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• 2012

The number of smart phone users is rapidly growing due to recent increase in wireless Internet usage, development of a wide variety of applications, and activation of M2M (Machine to machine) services. Although the smart phone offers benefits of mobility and convenience, it also has serious security problems. To utilize M2M services in the smart phone, a flexible integrated authentication and access control facility is an essential requirement. To solve these problems, we propose a context-aware single sign-on and access control system that uses context-awareness, integrated authentication, access control, and an OSGi service platform in the smart phone environment. In addition, we recommend Fuzzy Logic and MAUT (Multi-Attribute Utility Theory) in handling diverse contexts properly as well as in determining the appropriate security level. We also propose a security system whose properties are flexible and convenient through a typical scenario in the smart phone environment. The proposed context-aware security system can provide a flexible, secure and seamless security service by adopting diverse contexts in the smart phone environment.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제17권11호
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• pp.3003-3029
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• 2023

The rapid evolution of the IoT has paved the way for new opportunities in smart city domains, including e-health, smart homes, and precision agriculture. However, this proliferation of services demands effective SLAs between customers and service providers, especially for critical services. Difficulties arise in maintaining the integrity of such agreements, especially in vulnerable wireless environments. This study proposes a novel SLA management model that uses an SDN-Enabled WSN consisting of wireless nodes to interact with smart contracts in a straightforward manner. The proposed model ensures the persistence of network metrics and SLA provisions through smart contracts, eliminating the need for intermediaries to audit payment and compensation procedures. The reliability and verifiability of the data prevents doubts from the contracting parties. To meet the high-performance requirements of the blockchain in the proposed model, low-cost algorithms have been developed for implementing blockchain technology in wireless sensor networks with low-energy and low-capacity nodes. Furthermore, a cryptographic signature control code is generated by wireless nodes using the in-memory private key and the dynamic random key from the smart contract at runtime to prevent tampering with data transmitted over the network. This control code enables the verification of end-to-end data signatures. The efficient generation of dynamic keys at runtime is ensured by the flexible and high-performance infrastructure of the SDN architecture.

• 한국IT서비스학회지
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• 제23권2호
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• pp.13-29
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• 2024

Recently, with the rapid spread of mobile terminals such as smartphones and tablet PCs, social demand for mobile information security is increasing as new security issues that are difficult to predict as well as service evolution and lifestyle changes are raised. Smart terminals include smartphones, smart pads, chromebooks, laptops, etc. that provide various functions such as phone calls, text messages, Internet browsing, social media apps, games, and education. Along with the explosive spread of these smart terminals, they are naturally being used in our daily life and educational environment. In the mobile environment, behind the convenience of portability, there are more various security threats and vulnerabilities than in the general PC environment, and threats such as device loss, information leakage, and malicious codes exist, so it is necessary to take fundamental security measures at a higher level. In this study, we suggest ways to improve security by identifying trends in mobile smart information security and effectively responding to security threats to the mobile environment. In addition, it presents implications for various measures for effective class utilization along with correct security management methods and security measures related to the supply of smart devices that the Office of Education is promoting for schools at each level.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권2호
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• pp.1057-1069
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• 2017

The applications of Wireless Sensor Networks (WSN) are progressively adopting for various smart home services such as home automation, controlling smart home household appliances, constrained application services in a smart home, etc. However, enabling a seamless and ubiquitous WSN communication between the smart home appliances is still a challenging job. Therefore, in this paper, we propose a smart home control system using an Actuator based ZigBee networking (AZNET). The working of the proposed system is further divided into three phases, 1) an interference avoidance system is adopted to mitigate the effect of interference caused due to the co-existence of IEEE 802.11x based wireless local area networks (WLAN) and WSN, 2) a sensor-based smart light control system is used to fulfill the light requirement in the smart home using the sunlight with light source, and 3) an autonomous home management system is used to regulate the usage time of the electronic appliances in the smart home. The smart is tested in real time environment to use the sunlight with light sources in a various time of the day. Similarly, the performance of the proposed smart home is verified through simulation using C# programming language. The results and analysis revealed that the proposed smart home is less affected by the interference and efficient in reducing the energy consumption of the appliances available in the smart home scenario.

• 한국콘텐츠학회논문지
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• 제21권6호
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• pp.524-532
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• 2021

방송통신융합 미디어인 스마트TV가 글로벌 시장에서 OTT 비디오 서비스를 주요 콘텐츠로 제공하면서 유료방송의 대안으로 부상했다. 한편 국내에서 스마트TV는 확산이 느려 연구가 거의 진행되지 않았다. 하지만 글로벌 스마트TV 성장이 국내에도 영향을 미칠 것으로 예측됨에 따라 스마트TV 이용자의 특성 및 이용행태 등에 대한 분석이 필요하다. 이에 이 연구는 미디어패널데이터를 활용하여 인구사회학적 특성 및 유료미디어 이용행태가 스마트TV이용에 미치는 영향을 탐색하였다. 연구결과 연령, 가구형태, 가구소득, 거주지역규모 등이 스마트TV 이용과 관련이 있었고, 유료플랫폼 중 IPTV 가입자가 스마트TV를 보완적으로 이용했으며, VOD 지출액이 클수록 스마트TV 이용가능성이 컸다. 영화VOD 지출액이 큰 IPTV 가입자는 스마트TV로 대체할 가능성이 낮았다. 이 연구는 소홀했던 스마트TV에 대한 연구를 재점화하고 사업자들에게 전략적 시사점을 제공하는데 활용될 수 있을 것이다.