Contact Info

Primary Title: 
Emerita Professor
Email Contact: 
Voice Contact: 
(541) 737-4686
Fax Contact: 
(541) 737-0517
Kidd 368
Office Hours: 

Spring Term 2010: MW 1:30-2:50 Arrange other times through email.


Ph.D., Carnegie-Mellon, 1980.


Research Field: 
Applied Mathematics, Biomathematics, and Populations Dynamics
Research Description: 

Murphy is studying the dynamics of age-structured populations. The basic model consists of a first order partial differential equation coupled with an integral equation. Population models are often used to describe renewable resources. When a biological resource is exploited, it is of both practical and theoretical interest to determine the harvesting policy which maximizes the yield. She has found the optimal policy for some versions of the model. Another problem posed by natural populations is the scarcity of age-structured data. Murphy has developed a model based on a physiological, observable quantity (such as size) rather than age. Her model incorporates a commonly observed feedback effect--an individual growth depends upon the state of the entire population, while the dynamics of the population as a whole depend upon the sizes of the individual members.

Research Group: