Web Information Systems Engineering - WISE 2009: 10th by Richard A. DeMillo (auth.), Gottfried Vossen, Darrell D. E.

By Richard A. DeMillo (auth.), Gottfried Vossen, Darrell D. E. Long, Jeffrey Xu Yu (eds.)

This publication constitutes the court cases of the tenth overseas convention on net info platforms Engineering, clever 2009, held in Poznan, Poland, in October 2009.

The 33 revised complete papers and 17 revised brief papers provided including keynote talks have been conscientiously reviewed and chosen from round one hundred forty four submissions. The papers are geared up in topical sections on internet computing, business consultation, tagging, semantics, seek, visualization, net prone, belief and uncertainty, suggestion and caliber of carrier, person interfaces, net figuring out, exploiting buildings details on the net, platforms, info mining and querying, querying and workflow and architecture.

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Additional resources for Web Information Systems Engineering - WISE 2009: 10th International Conference, Poznań, Poland, October 5-7, 2009. Proceedings

Example text

The whole collection, or local when only a subset of the collection is considered). Further we use df(t) for the number of documents a term occurs in, also called the document frequency of term t. The number of occurrences of term t in document d is denoted to as the term frequency tf(t,d). In this context, we propose the usage of the following unsupervised methods as possible local feature selection methods in the DESENT system. Document Frequency (DF). One of the most prevalent techniques is denoted as document frequency thresholding.

Experiment testbed 20 M. Pathan, J. Broberg, and R. Buyya The experiment was run simultaneously at each client location over a period of 48 hours, during the middle of the week in May, 2009. As it spans two days, localized peak times (time-of-day) is experienced in each geographical region. The workload to drive the experiment incorporates recent results on Web characterization [2][3][11]. The high variability and self-similar nature of Web access load is modeled through heavy-tailed distributions.

4. In the case of utility-based request-redirection, the MetaCDN Load Redirector is triggered to select the highest-utility optimal replica that conforms to the specified service requirements. At this point, the MetaCDN gateway returns an HTTP redirect request with the URL of the selected replica. The following tests are performed to determine the best replica for serving user requests: • Is there a content replica available within required response time threshold? • Is the throughput of the target replica within tolerance?

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