Results 101 to 110 of about 13,646 (248)
Mathematical and Computational ApplicationsThis study investigates the dynamic behavior of an SIRS epidemic model in discrete time, focusing primarily on mathematical analysis. We identify two equilibrium points, disease-free and endemic, with our main focus on the stability of the endemic state.
Mohamed Cherif Belili +3 more
doaj +1 more source
Transactions of the Institute of British Geographers, EarlyView.Abstract What it means to be present is an important yet underexamined geographical problem. Owing to the recent surge in working from home, which has forced a rethink of the affordances of both face‐to‐face and virtual presence, we contend that the time is right for a re‐evaluation of this foundational geographical concept.
David Bissell +3 more
wiley +1 more source
The Chaos Dynamic of Multiproduct Cournot Duopoly Game with Managerial Delegation
Discrete Dynamics in Nature and Society, 2014 Although oligopoly theory is generally concerned with the single-product firm, what is true in the real word is that most of the firms offer multiproducts rather than single products in order to obtain cost-saving advantages, cater for the diversity of ...
Fang Wu, Junhai Ma
doaj +1 more source
Bifurcations of sleep patterns due to homeostatic and circadian variation in a sleep-wake flip-flop model [PDF]
, 2021 Christina Athanasouli +3 more
+6 more sources
Sex differences in cerebral pulsatility and damping: A 4D flow MRI study
Experimental Physiology, EarlyView.Abstract Cerebral pulsatility is a potential marker of cerebrovascular health, yet little is understood about sex differences in cerebral pulsatility with age, especially within different cerebral arteries. Additionally, cerebral damping can blunt cerebral pulsatility and might decline with age.
Sarean Harmoni A. Gaynor‐Metzinger +14 more
wiley +1 more source
Codimension one and codimension two bifurcations analysis of discrete mussel-algae model
AIMS MathematicsIn this paper, a continuous mussel-algae model was discretized using the explicit Euler method, yielding a discrete mussel-algae interaction model. Within this work, the stability and bifurcations of a discrete mussel-algae model were studied. First, the
Qingkai Xu, Chunrui Zhang, Xingjian Wang
doaj +1 more source
Irreversibility, uncertainty and underemployment equilibria [PDF]
, 1994 In a competitive overlapping generation model, underutilization of labor and equipment can be due to the combination of irreversibility of human capital, physical capital and technology with idiosyncratic productivity shocks.
Croix, David de la, Licandro, Omar
core +1 more source
Magnetic Resonance in Medicine, Volume 94, Issue 6, Page 2599-2610, December 2025.Abstract Purpose To assess the efficacy of self‐supervised deep learning (DL) denoising in reducing measurement variability in 4D‐Flow MRI, and to clarify the contributions of physiological variation to cerebrovascular hemodynamics. Methods A self‐supervised DL denoising framework was trained on 3D radially sampled 4D‐Flow MRI data.
Brock W. Jolicoeur +5 more
wiley +1 more source
A topological approach to stability of pulses bifurcating from an inclination-flip homoclinic orbit [PDF]
, 2000 Shunsaku Nii
openalex +1 more source
Magnetic Resonance in Medicine, Volume 94, Issue 6, Page 2435-2446, December 2025.Abstract Purpose To develop a flow pulsatile‐resolved pseudo‐continuous arterial spin labeling (FPR‐pCASL) technique for noninvasively assessing cerebral microvascular pulsatility. Methods In FPR‐pCASL, a pCASL sequence with single‐shot three‐dimensional gradient and spin echo acquisition was performed while simultaneously recording cardiac pulse ...
Tianrui Zhao +5 more
wiley +1 more source