Results 21 to 30 of about 4,077,188 (154)

Bounce Universe with Finite-Time Singularity

Universe, 2022
This work explains how the presence of a Type-IV singularity (a mild singularity) can influence the dynamics of a bouncing universe. In particular, we examine the bounce cosmology that appears with a Type-IV singularity in the context of a ghost-free ...
Sergei D. Odintsov, Tanmoy Paul
doaj   +1 more source

Resonances in a spring-pendulum: algorithms for equivariant singularity theory [PDF]

, 1998
A spring-pendulum in resonance is a time-independent Hamiltonian model system for formal reduction to one degree of freedom, where some symmetry (reversibility) is maintained.
Vegter, G, Lunter, G.A.; id_orcid, Lunter, Gerard, Hoveijn, I.,, Vegter, G., Lunter, G.A., Hoveijn, I., Vegter, G.,, Broer, H.W., Vegter, G.; id_orcid, Broer, H.W.,, Broer, H.W.; id_orcid, Lunter, GA, Hoveijn, I, Lunter, G.A.,, Broer, HW   +15 more
core   +2 more sources

Orbital angular momentum and topological charge of a Gaussian beam with multiple optical vortices [PDF]

Компьютерная оптика, 2020
Here we study theoretically and numerically a Gaussian beam with multiple optical vortices with unitary topological charge (TC) of the same sign, located uniformly on a circle.
Alexey Andreevich Kovalev, Victor Victorovich Kotlyar, Darya Sergeevna Kalinkina   +2 more
doaj   +1 more source

Generation of unconventional OAM waves by a circular array

The Journal of Engineering, 2019
In recent years, orbital angular momentum (OAM) waves have been applied to improve the performance of radar target detection and imaging. However, the phase singularity of conventional OAM beams and the doughnut-shaped intensity distribution will degrade
Kang Liu, Yongqiang Cheng, Hongqiang Wang, Yuliang Qin, Zhan Wang   +4 more
doaj   +1 more source

Relationship Between Electrical Instability and Pumping Performance During Ventricular Tachyarrhythmia: Computational Study

Frontiers in Physiology, 2020
There are representative electrical parameters for understanding the mechanism of reentrant waves in studies on tachyarrhythmia, namely the action potential duration (APD), dominant frequency, phase singularity, and filament.
Da Un Jeong, Ki Moo Lim
doaj   +1 more source

Influence of Fibrosis Amount and Patterns on Ventricular Arrhythmogenesis and Pumping Efficacy: Computational Study

Frontiers in Physiology, 2021
Myocardial fibrosis is an integral component of most forms of heart failure. Clinical and computational studies have reported that spatial fibrosis pattern and fibrosis amount play a significant role in ventricular arrhythmogenicity.
Aulia Khamas Heikhmakhtiar, Aulia Khamas Heikhmakhtiar, Abrha Abebe Tekle, Ki Moo Lim   +3 more
doaj   +1 more source

hpcng/singularity: Singularity 3.6.1

, 2020
Singularity 3.6.1 is a patch release fixing some bugs raised soon after the 3.6.0 release. In particular, an issue where supplying an empty string "" as the destination to singularity build could result in the removal of the current directory has been ...
David Godlove, Felix Abecassis, Carl Madison, Amanda Duffy, Mike Frisch, Gregory M. Kurtzer, Brian P Bockelman, Daniele Tamino, Vadim Pisaruk, Justin Cook, Jacob Chappell, cclerget, Geoffroy Vallee, DrDaveD, Michael Bauer, Jason Stover, Adam Hughes, Tru Huynh, Mike Gray, Sasha Yakovtseva, Marcelo Magallon, Yannick Cote, Ian Kaneshiro, Yaroslav Halchenko, Satrajit Ghosh, Vanessasaurus, David Trudgian, Dave Love, VP, Carlos Arango Gutierrez   +29 more
core   +1 more source

Shock dynamics of phase diagrams [PDF]

, 2014
A thermodynamic phase transition denotes a drastic change of state of a physical system due to a continuous change of thermodynamic variables, as for instance pressure and temperature.
Moro, Antonio
core   +1 more source

The inspection paradox: An important consideration in the evaluation of rotor lifetimes in cardiac fibrillation

Frontiers in Physiology, 2022
Background and Objective: Renewal theory is a statistical approach to model the formation and destruction of phase singularities (PS), which occur at the pivots of spiral waves.
Evan V. Jenkins, Dhani Dharmaprani, Dhani Dharmaprani, Madeline Schopp, Jing Xian Quah, Jing Xian Quah, Kathryn Tiver, Lewis Mitchell, Feng Xiong, Martin Aguilar, Kenneth Pope, Fadi G. Akar, Caroline H. Roney, Steven A. Niederer, Stanley Nattel, Martyn P. Nash, Richard H. Clayton, Anand N. Ganesan, Anand N. Ganesan   +18 more
doaj   +1 more source

GitHub Action to setup singularity

, 2020
To use Singularity containers in a workflow you need to install it first. This GitHub Action downloads, compiles and installs it for you. Added: Pre build binary for Singularity 3.8.3 Fixed: Unable to build from source https://github.com/eWaterCycle ...
Stefan Verhoeven
core   +1 more source