The importance of timely, accurate and effective use of available information is essential to
the proper management of emergency situations. In recent years, emerging technologies …

The idea of 'citizen as sensors' has gradually become a reality over the past decade. Today,
Volunteered Geographic Information (VGI) from citizens is highly involved in acquiring …

Enabling situation awareness in a given environment thus relies on being able to identify an
appropriate set of perception elements, coupled with higher-level comprehension patterns …

Social media has more than three billion users sharing events, comments, and feelings
throughout the world. It serves as a critical information source with large volumes, high …

In recent years, pluvial floods caused by extreme rainfall events have occurred frequently.
Especially in urban areas, they lead to serious damages and endanger the citizens' safety …

Various domain users are increasingly leveraging real-time social media data to gain rapid
situational awareness. However, due to the high noise in the deluge of data, effectively …

In recent years, many citizens use social media platforms like Twitter to share and get the
most up-to-date information regarding crisis events such as natural and man-made crisis …

The Dirichlet process and its extension, the Pitman–Yor process, are stochastic processes
that take probability distributions as a parameter. These processes can be stacked up to …

Many citizens nowadays flock to social media during crises to share or acquire the latest
information about the event. Due to the sheer volume of data typically circulated during such …

Highlights•Analysing Spanish tweets to detect environmentally-related
problems.•Computing a problem-relatedness perception index for decision …