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CCS Seminar
Professor Plamen Ivanov
Boston University Physics Department
Friday - April 2, 2010
12:00 noon
Physics Research Building - Room 595
3 Cummington Street

"Scale-invariant aspects of physiologic dynamics"

Physiological systems under neural regulation exhibit erratic  fluctuations, which traditionally have been considered as noise and thus, often neglected. However, recent findings indicate that physiologic fluctuations exhibit a temporal scale-invariant structure spanning time scales from seconds to hours, resembling the behavior of nonequilibrium physical systems characterized by power-law long-range correlations and fractal 1/f-type behavior. We will briefly review scale-invariance as a fundamental concept in modern physics, and we will demonstrate its usefulness in studying physiologic dynamics on examples from three complex physiologic systems under integrated neural control -- cardiac dynamics, locomotion and sleep.

Plamen Ch. Ivanov received a M.S. degree in Theoretical Physics/Condensed Matter Physics from Sofia University, Bulgaria, in 1988, a Ph.D. in Biophysics from Boston University in 1998, and a D.Sc. from the Bulgarian Academy of Sciences in 2007. He is currently a Research Associate Professor at the Physics Department at Boston University, and a Lecturer at the Division of Sleep Medicine at Harvard Medical School.

Dr. Ivanov's research interests include methods of analysis and modeling of integrated biological and physiological systems and networks; neural regulation; stochastic processes and phase transitions. He has served as an editor of Fluctuation and Noise Letters (FNL) in the period 2000-2002, and he currently serves as a Co-Editor of Europhysics Letters (EPL) and on the Editorial Board of the Journal of Biological Physics (JOBP).




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