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Tracking the Occurrence and Academic Effects of Sexual Violence at a University

Liu, Xiaoqian
Format
Thesis/Dissertation; Online
Author
Liu, Xiaoqian
Advisor
Gerber, Matthew
Brown, Donald
Laughon, Kathryn
Abstract
Most of student sexual assault victims are unwilling to report to the police. This makes investigation and spatial temporal analysis less representative because of lack of documented incident addresses. Due to this under-reporting issue, we are motivated to discover additional sexual assault incidents outside of the local crime report, for instance emergency records and news reports. These addresses can be quite useful to discover some undiscovered patterns in the crime analysis. In this research, I present an approach to automatically extract street addresses from news reports by applying a sequential labeling technique and semi-supervised learning. The previous work on address extraction only focuses on web pages where addresses are separated from other texts; however our problem needs to retrieve addresses embedded in texts. We built the Gradient Boosting and Conditional Random Field (CRF) models to solve this problem. In addition, we utilized a semi-supervised learning algorithm to use additional unlabeled data to further improve the predictive performance. In the end, we compared the patterns of extracted addresses from documented addresses in the crime report.
Language
English
Published
University of Virginia, Department of Systems Engineering, MS, 2016
Published Date
2016-04-26
Degree
MS
Collection
Libra ETD Repository
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