• 한국정보통신학회논문지
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• 제7권8호
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• pp.1661-1673
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• 2003

웹서비스는 웹의 구조를 서비스 기반의 보다 진화된 형태로 변화시키고 있는 가장 핵심적인 기술이며, 이러한 기술을 PDA, 스마트폰 등의 다양한 모바일 디바이스에서 효과적으로 적용하는 방법에 대한 연구가 필요한 시점이다. 특히, 우리나라는 CDMA 기반의 효율적이고 체계적인 모바일 환경을 갖추고 있으므로, 최근 크게 이슈가 되고 있는 웹서비스를 모바일 환경에 적용 및 활용 방법에 대한 연구를 수행하기에 적합하다고 할 수 있다. 본 논문에서는 기존의 모바일 환경에서 웹서비스를 효과적으로 적용할 수 있는 방법으로 다양한 기능을 수행하는 인터미디어리 기반의 모바일 웹서비스 프레임워크에 대하여 설명한다.

• 한국IT서비스학회지
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• 제9권1호
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• pp.157-172
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• 2010

Recently 'full browsing service' is growing rapidly throughout the world. This service allows mobile phone users to access websites using their mobile phone as they do using a PC. Despite the rapid expansion of the mobile phone market, however, criteria or scales for evaluating the new services are being developed slowly and far behind the current demand trends. Thus, this study proposed a customer satisfaction evaluation model for full browsing services through empirical research. The proposed model is expected to derive and suggest key factors that users consider important in full browsing services and those factors can be used in developing marketing strategies for maintaining existing customers and creating new customers.

• 한국컴퓨터정보학회논문지
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• 제19권12호
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• pp.209-218
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• 2014

모바일 웹 서비스 사용자가 증가함에 따라 품질을 고려한 모바일 웹 서비스 선택이 중요한 이슈로 여겨지고 있다. 품질계약은 서비스 품질의 수준을 명세한 웹 서비스 제공자와 웹 서비스 사용자간의 협약으로 웹 서비스 사용자는 품질계약을 통해 명세한 서비스 품질의 수준을 보장받을 수 있다. 본 논문에서는 품질을 고려하여 모바일 웹 서비스를 선택하기 위하여 중개자 기반의 프레임워크를 제안한다. 모바일 사용자들은 무선망에서 서비스 중개자를 통하여 웹 서비스를 요청할 수 있다. 서비스 중개자는 에이전트를 이용하여 웹 서비스 품질을 모니터링하며 서비스 품질계약에 위반사항이 발생하면 웹 서비스 제공자와 사용자에게 위반사항이 발생하였음을 통보함으로써 서비스 품질을 관리한다. 본 논문에서는 모니터링을 위하여 신뢰성, 응답시간, 그리고 가격 품질요소들을 사용하였으며 모바일 사용자들은 서비스 중개자를 통하여 품질 좋은 웹 서비스를 선택할 수 있다.

• ETRI Journal
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• 제30권5호
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• pp.634-643
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• 2008

One of the ubiquitous technology fields that have received the most attention recently from technology communities worldwide is mobile radio frequency identification (RFID). Mobile handsets loaded with RFID readers enable the identification and retrieval of information on RFID tagged objects. In Korea, a variety of mobile RFID services are currently being piloted, and their commercial roll-out looks imminent. The goal of this study is to propose, ahead of the commercial launch of mobile RFID services, a customer satisfaction index (CSI) model for this service category and to then measure the CSI to derive practical implications for their providers and pointers related to the improvement of service. A web survey was conducted on Korean mobile phone subscribers who had participated in a mobile RFID pilot program. Using the results of this survey, we tested the CSI model and its hypotheses by employing a partial least-squares-based structural equation model analysis and calculated the index. We further conducted an importance-performance analysis in order to provide insights that may be useful for improving the quality of mobile RFID services.

• 한국컴퓨터정보학회논문지
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• 제22권10호
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• pp.47-54
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• 2017

In this paper, we propose a connected car platform architecture called Mobile Second for developing of verity convergence services. A Mobile Second platform architecture is designed to provide more powerful and diverse convergence services for vehicles and drivers by applying technologies of Connected Car and ICT Convergence in various ways. The Mobile Second platform is implemented by applying Tizen IVI and Android to hardware platforms for IVI, Nexcom's VTC1010 and Freescale's i.MX6q/dl respectively. The Mobile Second platform provides the driver with the vehicle's information via IVI devices, mobile devices and PCs, etc., and provides Vehicle Selective Gateway(VSG) and Vehicle Control Framework for the driver to control his/her vehicle, and also provides a web framework to enable the use of VSG's APIs for the monitoring and controlling the vehicle information in various mobile environments as well as IVI devices. Since the Mobile Second platform aims to create new variety of services for Connected Car, it includes service frameworks for Smart Care / Self diagonostics, Mood & Entertainment services, and Runtime, libraries and APIs needed for the development of related applications. The libraries given by the Mobile Second Platform provides both a native library for native application support and a Java Script-based library for web application support, minimizing the dependency on the platform and contributing the convenience of developers at the same time.

• Human Ecology Research
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• 제58권4호
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• pp.497-515
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• 2020

The use of mobile payment services has recently increased in South Korea. Mobile payments allow consumers to purchase items digitally, using a mobile card in an app affiliated with a payment service. This study explores the predictors of intention to adopt mobile payment services. The study employed an A(affective)-B(behavioral)-C(cognitive) model with two antecedent variables: cognitive (perceived usefulness, perceived risk, perceived ease of use, and perceived herding behavior) and affective (satisfaction with the status quo, innovation resistance) responses. An online survey of 405 non-users of mobile payment services aged 20 to 49 years was conducted. The study used SPSS 23.0 for descriptive analysis and Amos 23.0 for confirmatory factor analysis and structural equation modelling. The results are as follows. First, perceived usefulness, perceived risk, and perceived herding behavior significantly influenced innovation resistance. Second, perceived herding behavior significantly influenced subjective norms. Third, innovation resistance and subjective norms significantly influenced the intention to adopt mobile payment services. The findings suggest that the A-B-C model can be useful in understanding consumers' adoption and resistance behaviors and that cognitive and affective responses are important antecedent variables affecting the decision to adopt mobile payment services.

• 한국IT서비스학회지
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• 제7권2호
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• pp.181-195
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• 2008

The rapid growth of mobile communication technology has provided the expansion of mobile internet services, particularly mobile realtime transaction takes much weight among mobile fields. There is an increasing demand for various mobile applications to process transactions in a mobile computing fields. Thus, During transmission in wireless networks a base station failure inevitably causes data loss of the base station buffer. It is required to compensate the loss for communication. The existing methods for a base station failure are not adequate because they all suffer from too much overhead and resolve only the link failure. In this paper, we study an efficient recovry systems for a mobile DBMS. We propose SLL (Segment Log List) that enables the mobile host to compensate data loss efficiently in the case of base station failure. In SLL, a base station deliveries an output information of data cells to a mobile host. when a base station fails, the mobile host can retransmit just next data cells. We also prove the efficiency of new method.

• 한국IT서비스학회지
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• 제13권4호
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• pp.245-254
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• 2014

Payment system is defined as the various contracts and operating facilities for the transfer of monetary value to clear the relationship between credit and debt. Payment systems essentially require the efficient and reliable operations. Card-based payment systems are developed practically and creatively in accordance with the progress of ICT. Especially in mobile environment with intelligent mobile devices such as smart-phones and tablets, a variety of payment services are provided. Existing card-based payment services are configured by the payment transaction initiated by the merchants card acceptance and then swiping into the CAT (Card Authorization Terminal) to begin the transaction. The merchant initiated payment services are now applied to the Wireless CAT (W-CAT) for mobile environment. That kind of payment services cause many problems such the illegal card information leaks and the lingering threat of W-CAT theft. Also, the use of many W-CATs increased cost to the merchant. In this paper, we propose the card holder initiated card payment system using the intelligent mobile devices in mobile environment for solving problems of the existing merchant initiated card payment system and coping effectively with the activation of a wireless data network and changes of information technology.

• Journal of Information Technology Applications and Management
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• 제18권1호
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• pp.55-74
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• 2011

The growth in the use of ubiquitous computing based on mobile services as an enabler to conduct business more effectively has been phenomenal. Technology acceptance model (TAM) has been applied in different contexts to examine a wide range of information technologies (IT). As more and more companies are finding ways to utilize ubiquitous computing based on mobile services, an important issue is to understand what factors will impact the decisions of consumers in adopting the services. Based on TAM with three additional groups of external factors, i.e., service-related factors (ubiquitous access, context awareness) and technology-related factors (perceived security risk, network connectivity) that are theoretically justified as having influence on both perceived usefulness and perceived ease of use which are additionally considered, a research model for the investigated technology acceptance was developed and empirically examined, using responses from more than intended users of ubiquitous computing based on mobile services. The specific purposes of this study are as follows. Firstly, this study is to identify service beliefs considering unique characteristics for ubiquitous services such as perceived ubiquitous access and perceived context awareness. Secondly, this study is to investigate network characteristics beliefs such as perceived security and perceived connectivity. Thirdly, this paper investigates the relationship among variables such as ubiquitous characteristics, network characteristics, behavioral beliefs, and intention to use ubiquitous web services. This study uses a structural equation model to test the research model. The major results of this study are as follows. Firstly, ubiquitous access has a influence on perceived usefulness and perceived ease of use. Context awareness has an influence on perceived usefulness. Secondly, User familiarity has an influence on perceived usefulness and perceived ease of use, and intention to use. User innovativeness has an influence on perceived ease of use. Thirdly, perceived security risk has an influence on perceived usefulness and perceived ease of use. Network connectivity has an influence on perceived usefulness and perceived ease of use. Fourth, there exist differential effects among factors in structural model among information, transaction, and entertainment services.

• 경영과학
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• 제23권3호
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• pp.27-39
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• 2006

Designing mobile Interfaces is fundamentally different from designing online interfaces. Not only are there differences in underlying technologies, but also in the way people use mobile Interfaces. If these differences are not taken into account in designing mobile interfaces, mobile services are likely to fail. If mobile services do not deliver what people want, these services will fail no matter how excellent the underlying technology is. The user interface design commonly used in mobile services is based on multi-layered approach, which is not very user-friendly. A well designed single layered user Interface will be more user friendly than the conventional one and it will be having edge over others. However, it is quite difficult to Provide a single layered user Interface in a small screen. This study aims at examining how design attributes of mobile interfaces affect customer preferences. In order to explore customer preferences to each design attribute of mobile interfaces, we measure and analyze customer's WTP (Willingness To Pay) toward their different interface designs. Ultimately, throughout the study, we try to answer how to design mobile interfaces in small screen of mobile devices. In addition, we propose an optimal design solution that customers likely prefer.