University of Konstanz
Graduiertenkolleg / PhD Program
Computer and Information Science

Colloquium of the Department and the PhD Program

title

(begins at 17:00 h) Learning and Detecting Emergent Behavior in Networks of Cardiac Myocytes

speaker

Prof. Dr. Radu Grosu, State University of New York at Stony Brook
New York, USA

date & place

Wednesday, 08.07.2009, 17:00 h
Room C 252

abstract

We address the problem of specifying and detecting emergent behavior in networks of cardiac myocytes, spiral electric waves in particular, a precursor to atrial and ventricular fibrillation. To solve this problem we: (1) Apply discrete mode-abstraction to the cycle-linear hybrid automata (CLHA) we have recently developed for modeling the behavior of myocyte networks; (2) Introduce the new concept of Spatial-Superposition of CLHA modes; (3) Develop a new spatial logic, based on spatial superposition, for specifying emergent behavior; (4) Devise a new method for learning the formulae of this logic from the spatial patterns under investigation; and (5) Apply bounded model checking to detect (within milliseconds) the onset of spiral waves. We have implemented our methodology as the Emerald tool-suite, a component of our EHA framework for specification, simulation, analysis and control of excitable hybrid automata. We illustrate the effectiveness of our approach by applying Emerald to the scalar electrical fields produced by our CX simulator.