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In this paper, we design and develop a movie-rating and review-summarization system in a mobile environment. The movie-rating information is based on the sentiment-classification result. The condensed descriptions of movie reviews are generated from the feature-based summarization. We propose a novel approach based on latent semantic analysis (LSA) to(More)
A key agreement protocol is a protocol whereby two or more communicating parties can agree on a key or exchange information over an open communication network in such a way that both of them agree on the established session keys for use in subsequent communications. This paper proposes an efficient anonymous key agreement protocol based on chaotic maps. By(More)
In this paper, we present a distributed complex event processing (CEP) engine for Internet of Things and its applications. A CEP Engine combines information from a variety of sources. It looks for patterns in these event streams and then responds in real-time. Complex event processing is an effective mechanism to analyze object data, to reason sensing(More)
In this paper, we propose a novel approach based on Bayesian network to predict a moving object’s future location under uncertainty. The approach includes space-partitioning schemes, popular region extraction, transformation of trajectory sequence and region sequence, frequent sequential pattern mining and the Bayesian network construction. Popular regions(More)
In this paper, we explore the role of simulators and testbeds in the development procedure of protocols or applications for Wireless Sensor Networks (WSNs) and Internet of Things (IoT). We investigate the complementarity between simulation and experimentation studies by evaluating latest features available among open testbeds (e.g., energy monitoring,(More)
In recent years, several kinds of wireless networks have been widely deployed to enhance mobile communication. In this study, we focus on Taiwan's electronic bus (e-bus) system and how public transit data are communicated. In Taiwan's current system, this type of transit data is provided through specific mobile network operators. Such operations require a(More)
In the tide called Cloud Computing, people move their applications previously running on on-premise servers to the Cloud. However, this migration is not a comfortable trip. Compatibility is a critical issue of the new environment. It is reasonable for the enterprises to decide to move certain portions of their IT infrastructure to the Cloud. And database is(More)
Running an email system with full protection from spam and viruses has always been a pain for any system administrator. The problem becomes more severe for those who are responsible for large number of mail-boxes with huge amount of data in a large-scale email system. By using MapReduce framework, which is designed for distributed processing of large data(More)
A new framework is designed for sentiment classification and feature based summarization system in a mobile environment. Posting online reviews has become an increasingly popular way for people to share their opinions about specific product or service with other users. It has become a common practice for web technologies to provide the venues and facilities(More)
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