title: Noise-controlled pattern formation and threshold shift for electroconvection in the conduction and dielectric regimes.
abstract: We report noise-controlled electrohydrodynamic pattern formations and threshold shifts in nematic liquid crystals. In the electrohydrodynamic system superposed with noise, experimental results obtained in the dielectric regime are compared to those in the conventional conduction regime. The noise intensity dependences of thresholds and pattern evolution processes are remarkably different for each regime. The pattern formation mechanisms in the presence of noise for both regimes are discussed based on the results. Moreover, it is found that the thresholds and characteristic wavelengths of dissipative structures can be effectively controlled by external multiplicative noises with appropriate intensity and correlation times.
authors.affiliation: Department of Mechanical Information Science and Technology, Faculty of Computer Science and Systems Engineering, Kyushu Institute of Technology, Fukuoka, Japan.
authors.forename: Jong-Hoon
authors.initials: JH
authors.lastname: Huh
authors.forename: Akiyuki
authors.initials: A
authors.lastname: Kuribayashi
authors.forename: Shoichi
authors.initials: S
authors.lastname: Kai
mesh_terms: D000465:Algorithms; D001703:Biophysics / Q000379:methods*; D003198:Computer Simulation; D004553:Electric Conductivity; D004560:Electricity; D015233:Models, Statistical; D009991:Oscillometry / Q000379:methods; D010363:Pattern Recognition, Automated