Currently I am a doctoral candidate in the Department of Spatial Information Science and Engineering under the guidance of Dr. Michael Worboys. My expected graduation date is December 2013, and I am looking for an academic teaching and/or research position starting immediately. Please see my curriculum vitae or profile on LinkedIn.

See my alternate site for more information about prior research and publications. My doctoral thesis topic summary is as follows:

Qualitative Models for Goal-directed Indoor Navigation

Formal models of indoor space for reasoning about pedestrian navigation tasks should capture key static and dynamic properties and relationships between agents, objects, and indoor spaces, and provide an effective framework for reasoning about change. Of particular interest are changes in properties or relationships that affect an agentís ability to carry out a goal directed navigation task. This thesis presents a framework for formally representing indoor environments, the events that occur in them, and their effects on the topological properties and relationships between indoor spaces and agents. The main goal is to provide a computational foundation for qualitative spatio-temporal reasoning about indoor pedestrian navigation by modeling the effects of key indoor events on agent behaviors and relationships in indoor environments. The framework has three major components:

A case study is provided applying the framework to the US Veteran's Administration Clinic domain is provided which illustrates that the framework can be used to generate navigation plans to assist both patients and medical staff to find appropriate goal-directed indoor navigation routes inside clinics.


Locus enim est principum generationis rerum (For place is the origin of things) - Roger Bacon

Contact Information

Lisa Ann Walton
Graduate Research Assistant
Department of Spatial Information Science and Engineering
School of Computing and Information Science
University of Maine, Orono, ME. 04469
lisa DOT walton AT maine DOT edu

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