Wednesday, 11 May 2016

EAIMS: Emergency Analysis Identification and Management System

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Social media has great potential as a means to enable civil protection and law enforcement agencies to more effectively tackle disasters and emergencies. However, there is currently a lack of tools that enable civil protection agencies to easily make use of social media. The Emergency Analysis Identification and Management System (EAIMS) is a prototype service that provides real-time detection of emergency events, related information finding and credibility analysis tools for use over social media during emergencies. This system exploits machine learning over data gathered from past emergencies and disasters to build effective models for identifying new events as they occur, tracking developments within those events and analyzing those developments for the purposes of enhancing the decision making processes of emergency response agencies.

Richard McCreadie, Craig Macdonald, and Iadh Ounis
EAIMS: Emergency Analysis Identification and Management System
In Proceedings of SIGIR, 2016.

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Tuesday, 8 March 2016

Comparing Overall and Targeted Sentiments in Social Media during Crises

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The tracking of citizens' reactions in social media during crises has attracted an increasing level of interest in the research community. In particular, sentiment analysis over social media posts can be regarded as a particularly useful tool, enabling civil protection and law enforcement agencies to more effectively respond during this type of situation. Prior work on sentiment analysis in social media during crises has applied well-known techniques for overall sentiment detection in posts. However, we argue that sentiment analysis of the overall post might not always be suitable, as it may miss the presence of more targeted sentiments, e.g. about the people and organizations involved (which we refer to as sentiment targets).  Through a crowdsourcing study, we show that there are marked differences between the overall tweet sentiment and the sentiment expressed towards the subjects mentioned in tweets related to three crises events.

Saul Vargas, Richard McCreadie, Craig Macdonald, and Iadh Ounis
Comparing Overall and Targeted Sentiments in Social Media during Crises
In Proceedings of ICWSM, 2016.

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