The Web has become a rich source of personal information in the
last few years. People twitter, blog, and chat online. Current
feelings, experiences or latest news are posted. For instance,
first hints to disease outbreaks, customer preferences, or
political changes could be identified with this data.
Surveillance or early warning systems enable such detection of
changes and support humans in getting information on changing
situations. However, the variety of data that could be considered
for surveillance is immense, ranging from sensor-measured values to
collected counts and information extracted from natural language
documents.Denecke's objective is to introduce the multiple
possibilities and facets of surveillance and its applications. She
first introduces the task of surveillance and provides an overview
on surveillance in various domains. Next, the various information
sources that are available and could already be used by
surveillance systems are summarized. In the main part of the book,
her focus is on unstructured data as a source for surveillance. An
overview on existing methods as well as methods to be developed in
order to process this kind of data with respect to surveillance is
presented. As an example application, she introduces disease
surveillance using Web 2.0, including corresponding methods and
challenges to be addressed. The book closes with remarks on new
possibilities for surveillance gained by recent developments of the
Internet and mobile communication, and with an outline of future
challenges.
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