Results 61 to 70 of about 13,897 (205)

A second species of non‐crocodyliform crocodylomorph from the Late Triassic fissure deposits of southwestern UK: Implications for locomotory ecological diversity in Saltoposuchidae

The Anatomical Record, EarlyView.
Abstract The Late Triassic–Early Jurassic fissures of the Bristol Channel area (southwest England and south Wales) are renowned for their diverse vertebrate faunas. These assemblages have yielded an array of predominantly small‐bodied forms that are crucial to our understanding of the early evolution of several major tetrapod clades.
Ewan H. Bodenham, Stephan N. F. Spiekman, Susannah C. R. Maidment, Paul Upchurch, Philip D. Mannion   +4 more
wiley   +1 more source

Effects of Internet Sales Promotion on a Differential Advertising Model

Discrete Dynamics in Nature and Society, 2018
Advertising and sales promotion are two important specific marketing communications tools. In this paper, Internet sales promotion is introduced into a differential advertising model and investigated quantitatively.
Hui Jiang, Junhai Ma
doaj   +1 more source

Flip and Neimark-Sacker Bifurcations of a Discrete Time Predator-Pre Model

IEEE Access, 2019
In this paper, we investigate the system undergoes flip and Neimark Sacker bifurcation in the interior of R+2 by using the center manifold theorem and bifurcation theory. The dynamics of this discrete time predator-pre model is investigated in the closed
Yong Li, Muhammad Rafaqat, Tariq Javed Zia, Imran Ahmed, Chahn Yong Jung   +4 more
doaj   +1 more source

Numerical Analysis of Nonlinear Dynamics Based on Spin-VCSELs with Optical Feedback

Photonics, 2021
In this paper, the nonlinear dynamics of a novel model based on optically pumped spin-polarized vertical-cavity surface-emitting lasers (spin-VCSELs) with optical feedback is investigated numerically.
Tingting Song, Yiyuan Xie, Yichen Ye, Bocheng Liu, Junxiong Chai, Xiao Jiang, Yanli Zheng   +6 more
doaj   +1 more source

Oldest well‐preserved euprimate petrosal, from the early Eocene of India (Vastan Lignite Mine, Gujarat)

The Anatomical Record, EarlyView.
Abstract An exquisitely preserved, isolated partial petrosal with associated fragmentary stapes is described from the Vastan Lignite Mine (Gujarat, India), dated to the early Eocene (~54.5 Ma). Several anatomical traits (e.g., large petrosal plate; posterolateral entry of the internal carotid artery to the tympanic cavity; bony tubes surrounding the ...
Mary T. Silcox, Kenneth D. Rose, Rachel H. Dunn, Kishor Kumar, Rajendra S. Rana, Ashok Sahni, Lachham Singh, Thierry Smith, Jordan W. Crowell   +8 more
wiley   +1 more source

Bifurcations and chaos in a discrete SI epidemic model with fractional order

Advances in Difference Equations, 2018
In this study, a new discrete SI epidemic model is proposed and established from SI fractional-order epidemic model. The existence conditions, the stability of the equilibrium points and the occurrence of bifurcation are analyzed.
Mahmoud A. M. Abdelaziz, Ahmad Izani Ismail, Farah A. Abdullah, Mohd Hafiz Mohd   +3 more
doaj   +1 more source

All-optical memory based on the injection locking bistability of a two-color laser diode

, 2008
We study the injection locking bistability of a specially engineered two-color semiconductor Fabry-Perot laser. Oscillation in the uninjected primary mode leads to a bistability of single mode and two-color equilibria.
A. Amann, Bauer, Fischer, Heil, Hill, Ishii, Jeong, K. Buckley, Kawaguchi, Kovanis, Mori, Otsuka, O’Brien, O’Brien, Raburn, Ramos, S. Osborne, S. O’Brien, Schikora, Sciamanna, Simpson, Tanguy, Varangis, Wang, White, Wieczorek, Zhukovsky   +26 more
core   +1 more source

Complex patterns on the plane: different types of basin fractalization in a two-dimensional mapping [PDF]

, 2002
Basins generated by a noninvertible mapping formed by two symmetrically coupled logistic maps are studied when the only parameter \lambda of the system is modified.
Collet P., DANIÈLE FOURNIER-PRUNARET, Gumowski I., RICARDO LÓPEZ-RUIZ   +3 more
core   +1 more source

Characterization of Pulmonary Functional Abnormalities in Systemic Sclerosis Using Xenon MRI

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Xenon MRI is increasingly used to evaluate patients with interstitial lung disease (ILD) and pulmonary hypertension (PH), both of which are common manifestations of systemic sclerosis (SSc). As such, Xe‐MRI may be suited to interrogate lung function impairment in SSc.
Dawson Shaver, Steven Haworth, Evan Graumann, Bradie Frizzell, David H. Lee, Jiwoong Choi, Chase S. Hall, Scott M. Matson, Mark Hamblin, Mario Castro, Paul S. Schmidt, Peter J. Niedbalski   +11 more
wiley   +1 more source

Kneadings, Symbolic Dynamics and Painting Lorenz Chaos. A Tutorial

, 2012
A new computational technique based on the symbolic description utilizing kneading invariants is proposed and verified for explorations of dynamical and parametric chaos in a few exemplary systems with the Lorenz attractor.
Abad A., Afraimovich V., Afraimovich V., ANDREY SHILNIKOV, Barrio R., Barrio R., Bykov V. V., Glendinning P., Gonchenko S. V., Hubner U., LEONID SHILNIKOV, Malkin M., ROBERTO BARRIO, Roshchin N., Rychlic M., Shilnikov A., Shilnikov L., Shilnikov L., Shilnikov L., Shilnikov L. P.   +19 more
core   +1 more source