Results 11 to 20 of about 1,852 (142)

Diversity of cells and signals in the cardiovascular system

The Journal of Physiology, Volume 601, Issue 13, Page 2547-2592, 1 July 2023., 2023
Abstract figure legend This white paper discusses the cell diversity, co‐ordination and interaction patterns that are critical for robust cardiovascular function. We identify the major cell types and signals involved in cardiovascular function and emphasize the complexity at the subcellular, cellular and system levels that motivate both challenges and ...
Eleonora Grandi, Manuel F. Navedo, Jeffrey J. Saucerman, Donald M. Bers, Nipavan Chiamvimonvat, Rose E. Dixon, Dobromir Dobrev, Ana M. Gomez, Osama F. Harraz, Bence Hegyi, David K. Jones, Trine Krogh‐Madsen, Walter Lee Murfee, Matthew A. Nystoriak, Nikki G. Posnack, Crystal M. Ripplinger, Rengasayee Veeraraghavan, Seth Weinberg   +17 more
wiley   +1 more source

Spatiotemporal Tipping Induced by Turing Instability and Hopf Bifurcation in a Population Ecosystem Model with the Fear Factor

Complexity, Volume 2023, Issue 1, 2023., 2023
Population ecosystems can display the tipping points at which extinctions of species happens. To predict the appearance of tipping points and to understand their evolution mechanism are of uttermost importance for ecological balance. Using techniques from bifurcation theory, we can predict the emergence of tipping points based on a spatiotemporal ...
Min Xiao, Gong Chen, Feilong Wang, Zunshui Cheng, Yi Yao, M. De Aguiar   +5 more
wiley   +1 more source

Setting Safe Operation Conditions for Acetyl Chloride Hydrolysis through Dynamic Modelling and Bifurcation Analysis

Modelling and Simulation in Engineering, Volume 2023, Issue 1, 2023., 2023
Acetyl chloride hydrolysis is a highly sensitive exothermic reaction that has presented several industrial safety issues. In the present study, a multiparameter mathematical model, previously developed and applied to simulate the oscillatory thermal behavior of an experimental continuous stirred tank reactor, was used to determine the static/dynamic ...
Juan Carlos Ojeda Toro, Izabela Dobrosz-Gómez, Miguel Ángel Gómez García, Fahad Al Basir   +3 more
wiley   +1 more source

Feeding habits of the Middle Triassic pseudosuchian Batrachotomus kupferzellensis from Germany and palaeoecological implications for archosaurs

Palaeontology, Volume 65, Issue 3, May/June 2022., 2022
Abstract Bite traces on fossil bones are key to deciphering feeding ecology and trophic interactions of vertebrate past ecosystems. However, similarities between traces produced by different carnivorous taxa with similar dentitions, and misidentifications due to equifinality, hinder confident identifications of the bite makers.
Eudald Mujal, Christian Foth, Erin E. Maxwell, Dieter Seegis, Rainer R. Schoch, David Button   +5 more
wiley   +1 more source

Bogdanov–Takens Bifurcation Analysis of a Learning-Process Model

Axioms, 2023
In this paper, as a complement to the works by Monterio and Notargiacomo, we analyze the dynamical behavior of a learning-process model in a case where the system admits a unique interior degenerate equilibrium.
Zhenliang Zhu, Yuxian Guan
doaj   +1 more source

Spatiotemporal Evolution Characteristics of Time‐Delay Ecological Competition Systems with Food‐Limited and Diffusion

Complexity, Volume 2022, Issue 1, 2022., 2022
In this paper, we put forward a time‐delay ecological competition system with food restriction and diffusion terms under Neumann boundary conditions. For the case without delay, the conditions for local asymptotic stability and Turing instability are constructed.
Feilong Wang, Min Xiao, Zhengxin Wang, Jing Zhao, Gong Chen, Jinde Cao, Sergey Dashkovskiy   +6 more
wiley   +1 more source

Chaos in the Takens-Bogdanov bifurcation with O(2) symmetry [PDF]

, 2016
The Takens–Bogdanov bifurcation is a codimension two bifurcation that provides a key to the presence of complex dynamics in many systems of physical interest. When the system is translation invariant in one spatial dimension with no left-right preference
A. M. Rucklidge, Chandrasekhar S, E. Knobloch, Knobloch E, Kuznetsov Y, Langford WF, Matthies K, Peplowski P, Rucklidge AM   +8 more
core   +2 more sources

The Stability Analysis and Transmission Dynamics of the SIR Model with Nonlinear Recovery and Incidence Rates

Mathematical Problems in Engineering, Volume 2022, Issue 1, 2022., 2022
In the present paper, the SIR model with nonlinear recovery and Monod type equation as incidence rates is proposed and analyzed. The expression for basic reproduction number is obtained which plays a main role in the stability of disease‐free and endemic equilibria.
Ihsan Ullah Khan, Muhammad Qasim, Amine El Koufi, Hafiz Ullah, Asier Ibeas   +4 more
wiley   +1 more source

Hopf bifurcations for an oversteer vehicle – the influence of wheel load changes

PAMM, Volume 21, Issue 1, December 2021., 2021
Abstract In [1] the occurence of a Hopf bifurcation at steady‐state cornering for a two‐wheel oversteering vehicle with a brush model for the tyre forces was found and following the bifurcating branch of periodic solutions we observed a Canard phenomenon and relaxation oscillations, which are typical for singularly perturbed systems. In that article we
Alois Steindl, Johannes Edelmann, Manfred Plöchl   +2 more
wiley   +1 more source

Dynamic Behaviors and Mechanisms of Permanent Magnet Synchronous Motor with Excitation

Mathematical Problems in Engineering, Volume 2021, Issue 1, 2021., 2021
The aim of this study is to make a general exploration of the dynamic characteristics of the permanent magnet synchronous motor (PMSM) with parametric or external perturbation. The pitchfork, fold, and Hopf bifurcations are derived by using bifurcation theory.
Shaohua Liu, Tingting Shao, Hai-dong Wu, Dong-hui Zhang, Qing-zhen Han, Massimiliano Ferrara   +5 more
wiley   +1 more source