In this paper we address the stabilization problem of a networked control system with signal-to-noise ratios (SNRs) constrained channels. The minimal SNRs required for stabilizability are obtained by a novel linear matrix inequality approach. Similar results are provided under circumstances of a constant delay and random packet loss. The effectiveness of the proposed approach is demonstrated wi...

Advances in fabrication, modern sensor and communication technologies, and computer architecture have enabled a variety of new networked sensing and control applications. However, many difficulties are inherent with these systems, for example, the constrained communication and computation capabilities, and limited energy resources, which are frequently seen in a wireless sensor network. As a co...

With more and more real deployments of wireless sensor network applications, we envision that their success is nonetheless determined by whether the sensor networks can provide a high quality stream of data over a long period. In this paper, we propose a consistency-driven data quality management framework called Orchis that integrates the quality of data into an energy efficient sensor system ...

Networked computer technology has become prevalent in higher education but little research has been conducted to attest to its benefits for the ESL student writer. This study compared students in two ESL writing environments; a networked computer-assisted classroom and a traditional oral classroom. Three measures were used to examine attitudes towards writing with computers, writing apprehensio...

As a result of listening tests performed with users of multimedia applications we present constraints for a dynamic adaptation (scaling) of audio data streams to the available system and network resources. For the speech medium any severe deformation of frequency characteristics should be avoided, while shortening and expanding of speech pauses is suitable to cope with varying delays. For the m...

Business-to-Business (B2B) electronic commerce environments are characterized by frequent information exchange. The Internet and advanced information technologies (IT) permit organizations to access information across organizational boundaries. It is important to assure organizations of the quality of information they get from other organizations. However, a well-established data quality (DQ) s...

The Internet is a desirable platform for many new forms of distributed applications in business, science, and education. A side effect emerging from rapid widespread and uneven acceptance and fast paced new extensions of the Internet communication technology base is the varying operating conditions under which a distributed application can be expected to be running. For mission critical applica...