<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=windows-1252">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<br>
<div class="moz-forward-container"><br>
<br>
-<br>
<br>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b>Spatiotemporal Crime
Prediction using GPS- and Time-Tagged Tweets</b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b><br>
</b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b>Dr. Matt Gerber</b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b>Department of Systems and
Information Engineering </b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b>University of Virginia </b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b>Friday, Nov 8st, 11:00am
in 3105 EB</b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b><br>
</b></font></div>
<div style="text-align: center;margin-top: 0px; margin-bottom:
0px; margin-left: 0px; margin-right: 0px; text-indent: 0px; "><font
class="Apple-style-span" size="4"><b><br>
</b></font></div>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px;
margin-right:0px; -qt-block-indent:0; text-indent:0px;"> </p>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; "><br>
</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">Abstract:</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">Recent research has shown
that social media messages (e.g., tweets) can be used to predict
various large-scale events like elections (Bermingham and
Smeaton, 2011), infectious disease outbreaks (St. Louis and
Zorlu, 2012), and even national revolutions (Howard et al.,
2011). The essential hypothesis is that the timing, location,
and content of these messages are informative with regard to
such future events. For many years, the Predictive Technology
Laboratory at the University of Virginia has been constructing
statistical prediction models of criminal incidents (e.g.,
robberies and assaults), and we have recently found preliminary
evidence of Twitter’s predictive power in this domain (Wang,
Brown, and Gerber, 2012). In my talk, I will present an overview
of our crime prediction research with a specific focus on
current Twitter-based approaches. I will discuss (1) how precise
locations and times of tweets have been integrated into the
crime prediction model, and (2) how the textual content of
tweets has been integrated into the model via latent Dirichlet
allocation. I will present current results of our research in
this area and discuss future areas of investigation.</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; "><br>
</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">Bio:</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">Matthew Gerber joined the
University of Virginia faculty in 2011 and is currently a
Research Assistant Professor in the Department of Systems and
Information Engineering. Prior to joining the University of
Virginia, he was a Ph.D. candidate in the Department of Computer
Science and Engineering at Michigan State University and a
Visiting Instructor in the School of Computing and Information
Systems at Grand Valley State University. In 2010, he received
(jointly with Joyce Chai) the ACL Best Long Paper Award for his
work on recovering null-instantiated arguments for semantic role
labeling. His current research focuses on the semantic analysis
of natural language text and its application to various
prediction and informatics problems.</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; "><br>
</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">Host:</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">Dr. Joyce Chai <!--EndFragment--></div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; "><br>
</div>
<div style="margin-top: 0px; margin-bottom: 0px; margin-left: 0px;
margin-right: 0px; text-indent: 0px; ">
<div>-------------------------</div>
<div>Dr. Xiaoming Liu</div>
<div><br>
</div>
<div>Assistant Professor</div>
<div>Department of Computer Science and Engineering</div>
<div>Michigan State University</div>
<div><br>
</div>
</div>
<br>
</div>
<br>
</body>
</html>