Results 41 to 50 of about 21,564,977 (361)

Phenomenological model for the early universe [PDF]

open access: yesPhysical Review D, 2009
We consider the description of cosmological dynamics from the onset of inflation by a perfect fluid whose parameters must be consistent with the strength of the enhanced quantum loop effects that can arise during inflation. The source of these effects must be non-local and a simple incarnation of it is studied both analytically and numerically.
N. C. Tsamis, R. P. Woodard
openaire   +3 more sources

A Simple Rate-Independent Uniaxial Shape Memory Alloy (SMA) Model

open access: yesFrontiers in Built Environment, 2018
In this paper, three specific uniaxial phenomenological models commonly used for the description of a Shape Memory Alloy (SMA) behavior are examined in detail. In particular, the models examined are the Graesser-Cozzarelli model, the Wilde-Gardoni-Fujino
Aristotelis E. Charalampakis   +1 more
doaj   +1 more source

A Mechanism for Inducing Compressive Residual Stresses on a Surface by Laser Peening without Coating

open access: yesMetals, 2020
Laser peening without coating (LPwC) involves irradiating materials covered with water with intense laser pulses to induce compressive residual stress (RS) on a surface.
Yuji Sano, Koichi Akita, Tomokazu Sano
doaj   +1 more source

Software for Brain Network Simulations: A Comparative Study

open access: yesFrontiers in Neuroinformatics, 2017
Numerical simulations of brain networks are a critical part of our efforts in understanding brain functions under pathological and normal conditions. For several decades, the community has developed many software packages and simulators to accelerate ...
Ruben A. Tikidji-Hamburyan   +3 more
doaj   +1 more source

Stress Relaxation during Artificial Aging of an AlSi7Cu0.5Mg Cast Alloy

open access: yesCrystals, 2022
After casting and solidification, Al cast cylinder heads undergo a sequence of heat treatments to achieve the desired material properties. This sequence comprises solution heat treatment (SHT), quenching, and artificial aging.
René Wang   +5 more
doaj   +1 more source

A Phenomenological Model for Shakedown of Tough Hydrogels Under Cyclic Loads

open access: yesJournal of applied mechanics, 2018
Most tough hydrogels suffer accumulated damages under cyclic loads. The damages may stem from breakage of covalent bonds, unzipping of ionic crosslinks, or desorption of polymer chains from nanoparticle surfaces.
Zhongtong Wang   +6 more
semanticscholar   +1 more source

Numerical Modelling of Droplets and Beads Behavior over Super-Hydrophobic and Hydrophilic Coatings under in-Flight Icing Conditions

open access: yesApplied Sciences, 2022
Current technology has produced a wide range of advanced micro-structured surfaces, designed for achieving the best wettability and adhesion performances for each specific application.
Giulio Croce   +3 more
doaj   +1 more source

A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension [PDF]

open access: yesAstrophysical Journal, 2019
Motivated by the current status of cosmological observations and significant tensions in the estimated values of some key parameters assuming the standard ΛCDM model, we propose a simple but radical phenomenological emergent dark energy model where dark ...
Xiaolei Li, A. Shafieloo
semanticscholar   +1 more source

Emergence of robust growth laws from optimal regulation of ribosome synthesis

open access: yesMolecular Systems Biology, 2014
Bacteria must constantly adapt their growth to changes in nutrient availability; yet despite large‐scale changes in protein expression associated with sensing, adaptation, and processing different environmental nutrients, simple growth laws connect the ...
Matthew Scott   +3 more
doaj   +1 more source

A Phenomenological Model of a Downdraft Biomass Gasifier Flexible to the Feedstock Composition and the Reactor Design

open access: yesEnergies, 2021
The development of a one-dimensional (1D) phenomenological model for biomass gasification in downdraft reactors is presented in this study; the model was developed with the aim of highlighting the main advantages and limits related to feedstocks that are
Michela Costa   +3 more
doaj   +1 more source

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