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Introduction
With the introduction of new technologies such as WAP, HSCSD, GPRS, UMTS,
and Bluetooth, it is believed that the e- and m-commerce arena will sooner or later
merge its applications with handheld devices to create more opportunities for the
birth of a new generation of m-commerce .However, m-commerce is largely unrealized
to date because there still does not exist a single application that can attract
wireless users to use wireless services. According to a recent survey by Gartner,
Inc. (Behrens & McGuire, 2004), besides the importance of coverage of wireless
network and pricing issues, the wireless Internet and data services are the next crucial
factors that attract users to use wireless services. As such, there is a need to improve
the data services over the wireless network. Commonly seen data services include:
product brokering, news on demand, stock quotes, stock price alert services, and
so forth. One of these services is the information retrieval service.
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