James H. Nolen, Associate Professor
I study partial differential equations, which have been used to model many phenomena in the natural sciences and engineering. In many cases, the parameters for such equations are known only approximately, or they may have fluctuations that are best described statistically. So, I am especially interested in equations modeling random phenomena and whether one can describe the statistical properties of the solution to these equations. For example, I have worked on nonlinear partial differential equations that describe waves and moving interfaces in random media. This work involves ideas from both analysis and probability. I also study the asymptotic behavior of stochastic processes.  Contact Info:
Teaching (Spring 2017):
 MATH 490.01, TOPICS IN MATHEMATICS
Synopsis
 Physics 227, TuTh 10:05 AM11:20 AM
 (also crosslisted as BIOLOGY 490.01)
 Office Hours:
 Mondays, 12:30
Wednesdays, 10:3012
 Education:
Ph.D.  University of Texas at Austin  2006 
B.S.  Davidson College  2000 
 Specialties:

Analysis
Probability Applied Math
 Research Interests: Partial differential equations, stochastic processes, random media, applied mathematics, asymptotic analysis
I study partial differential equations, which have been used to model many phenomena in the natural sciences and engineering. In many cases, the parameters for such equations are known only approximately, or they may have fluctuations that are best described statistically. So, I am especially interested in equations modeling random phenomena and whether one can describe the statistical properties of the solution to these equations. For example, I have worked on nonlinear partial differential equations that describe waves and moving interfaces in random media. This work involves ideas from both analysis and probability.
 Areas of Interest:
partial differential equations stochastic processes asymptotic analysis homogenization theory front propagation reactiondiffusion equations
 Current Ph.D. Students
(Former Students)
 Representative Publications
(More Publications)
 Nolen, J, Normal approximation for a random elliptic equation,
Probability Theory and Related Fields, vol. 159 no. 34
(2014),
pp. 661700, ISSN 01788051 [pdf], [doi] [abs]
 J. Lu and J. Nolen, Reactive trajectories and the transition path process.,
Probability Theory and Related Fields
(January, 2014) [1744], [doi]
 Nolen, J, A central limit theorem for pulled fronts in a random medium,
Networks and Heterogeneous Media, vol. 6 no. 2
(2011),
pp. 167194, ISSN 15561801 [pdf], [doi] [abs]
 Nolen, J; Ryzhik, L, Traveling waves in a onedimensional heterogeneous medium,
Annales de l'Institut Henri Poincare (C) Analyse Non Lineaire, vol. 26 no. 3
(2009),
pp. 10211047, ISSN 02941449 [pdf], [doi] [abs]
 Mellet, A; Nolen, J; Roquejoffre, JM; Ryzhik, L, Stability of generalized transition fronts,
Communications in Partial Differential Equations, vol. 34 no. 6
(2009),
pp. 521552, ISSN 03605302 [pdf], [doi] [abs]
 Nolen, J; Xin, J, Asymptotic spreading of KPP reactive fronts in incompressible spacetime random flows,
Annales de l'Institut Henri Poincare (C) Analyse Non Lineaire, vol. 26 no. 3
(2009),
pp. 815839, ISSN 02941449 [pdf], [doi] [abs]
 Cardaliaguet, P; Nolen, J; Souganidis, PE, Homogenization and Enhancement for the GEquation,
Archive for Rational Mechanics and Analysis, vol. 199 no. 2
(2011),
pp. 527561, ISSN 00039527 [4160], [doi] [abs]
 Selected Grant Support
 Analysis of Fluctuations, National Science Foundation, DMS1007572.
 CAREER: Research and training in stochastic dynamics, National Science Foundation, DMS1351653.
