Results 31 to 40 of about 740,255 (159)

A possible common physical principle that underlies animal vocalization: theoretical considerations with an unsteady airflow-structure interaction model

Journal of Biomechanical Science and Engineering, 2016
We previously described an analytical model regarding how human falsetto voice is produced upon interaction between the respiratory airflow and vocal fold motion.
Shinji DEGUCHI
doaj   +1 more source

Theoretical Model of Chemomechanical Self‐Oscillation in a Two‐Enzyme Core–Shell Hydrogel With pH‐Gated Microcapsules

ChemSystemsChem, Volume 8, Issue 5, September 2026.
A closed chemo‐mechanical feedback system is constructed using a GOx/urease core–shell hydrogel with pH‐responsive microcapsules. Proton generation triggers urea release, activating urease and restoring pH, resulting in autonomous swelling–deswelling oscillations.
Shohei Shinbo, Taro Sukegawa, Yuhei Yamada, Shingo Maeda   +3 more
wiley   +1 more source

Subcritical Hopf bifurcations in a car-following model with reaction-time delay [PDF]

, 2005
A nonlinear car-following model of highway traffic is considered, which includes the reaction-time delay of drivers. Linear stability analysis shows that the uniform flow equilibrium of the system loses its stability via Hopf bifurcations and thus ...
Orosz, G, Stepan, G
core  

Design and Dynamic Response Characteristics Analysis of Hydrogen Fuel Cell Ship Combined Cooling and Power Supply System

Engineering Reports, Volume 8, Issue 8, August 2026.
An integrated hybrid energy storage and cogeneration system with CE‐DPS effectively stabilizes DC bus voltage in hydrogen fuel cell marine vessels. The proposed multi‐tier control suppresses voltage fluctuations, eliminates overshoot, and improves energy efficiency, achieving 68% exergy efficiency and 15.6% fuel savings.
Jingsi Hu, Feng Chen, Zhaoliang Zang
wiley   +1 more source

Numerical continuation of canard orbits in slow-fast dynamical systems [PDF]

, 2009
A trajectory of a system with two clearly separated time scales generally consists of fast segments (or jumps) followed by slow segments where the trajectory follows an attracting part of a slow manifold. The switch back to fast dynamics typically occurs
Desroches, MF, Osinga, HM, Krauskopf, B
core   +1 more source

Dynamics of a state-dependent delay-differential equation

Electronic Journal of Qualitative Theory of Differential Equations
We present a detailed study of a scalar differential equation with threshold state-dependent delayed feedback. This equation arises as a simplification of a gene regulatory model.
Tomas Gedeon, Antony Humphries, Michael Mackey, Hans-Otto Walther, Zhao Wang   +4 more
doaj   +1 more source

Impedance Spectroscopy of Bifurcation Oscillations in S‐Type Self‐Oscillatory Devices

Advanced Physics Research, Volume 5, Issue 7, July 2026.
Impedance spectroscopy (IS) reveals stability regimes and bifurcation dynamics in S‐type self‐oscillatory devices. By linking nonlinear control theory with frequency‐domain measurements, experimental signatures of oscillations, entrainment, and phase locking are directly identified.
Gonzalo Rivera‐Sierra, Roberto Fenollosa, Jenifer Rubio‐Magnieto, Nripan Mathews, Si En Ng, Juan Bisquert   +5 more
wiley   +1 more source

Estimates of the bistable region in metal cutting [PDF]

, 2008
The classical model of regenerative vibration is investigated with new kinds of nonlinear cutting force characteristics. The standard nonlinear characteristics are subjected to a critical review from the nonlinear dynamics viewpoint based on the ...
Dombovari, Zoltan, Wilson, RE, Wilson, R. Eddie, Stepan, Gabor, Stepan, G   +4 more
core   +1 more source

Modeled Long‐Term Effects of Psilocybin on Dynamic Activity and Effective Connectivity of Fronto‐Striatal‐Thalamic Circuits

Human Brain Mapping, Volume 47, Issue 10, July 2026.
We used fMRI data from a trial in psychedelic‐naïve healthy participants to show that psilocybin increases dynamic fronto‐striatal‐thalamic activity 4 weeks after dosing. Computational models revealed that reduced structure–function coupling is consistent with the emergence of increased activity dynamics, as well as increased bottom‐up and reduced top ...
Lorenzo Pasquini, Jakub Vohryzek, Anira Escrichs, Yonatan Sanz Perl, Adrian Ponce‐Alvarez, Sebastian Idesis, Manesh Girn, Leor Roseman, Jennifer M. Mitchell, Adam Gazzaley, Morten Kringelbach, David J. Nutt, Taylor Lyons, Robin L. Carhart‐Harris, Gustavo Deco   +14 more
wiley   +1 more source

Control-based continuation of unstable periodic orbits [PDF]

, 2009
Copyright © 2010 American Society of Mechanical Engineers (ASME)We present an experimental procedure to track periodic orbits through a fold (saddle-node) bifurcation and demonstrate it with a parametrically excited pendulum experiment where the tracking
Wagg, DJ, Jan Sieber, Krauskopf, B., Neild, Simon, Neild, S., Sieber, J, Wagg, D., Gonzalez-Buelga, Alicia, Simon Neild, Gonzalez-Buelga, A., David Wagg, Wagg, David, Neild, SA, Sieber, J., Bernd Krauskopf, Wagg, D.J., Krauskopf, B, Gonzalez Buelga, A, Alicia Gonzalez-Buelga, Krauskopf, Bernd   +19 more
core   +1 more source