Results 11 to 20 of about 475,511 (316)

Lumbar vertebral T2-relaxation time investigated with T2-mapping at multiple time points in a day demonstrate large individual variations [PDF]

open access: yes, 2022
PURPOSEThe increasing interest of endplate and Modic changes as potential pain generators in low back pain (LBP), along with advancement of functional quantitative magnetic resonance imaging (MRI) techniques, makes it important to characterize the ...
Hanna Hebelka   +7 more
core   +1 more source

Calculation of Relaxation Spectra from Stress Relaxation Measurements [PDF]

open access: yes, 2010
Application of stress on materials increases the energy of the system. After removal of stress, macromolecules comprising the material shift towards equilibrium to minimize the total energy of the system.
Kontogiorgos, Vassilis   +1 more
core   +1 more source

Dynamic Susceptibility of Ferrofluids: The Numerical Algorithm for the Inverse Problem of Magnetic Granulometry

open access: yesMathematics, 2021
The size-dependent properties of magnetic nanoparticles (MNP) are the major characteristics, determining MNP application in modern technologies and bio-medical techniques.
Alexey O. Ivanov, Vladimir S. Zverev
doaj   +1 more source

Benefits of Waveform Relaxation Method and Output Space Mapping for the Optimization of Multirate Systems [PDF]

open access: yes, 2014
We present an optimization problem that requires to model a multirate system, composed of subsystems with different time constants. We use waveform relaxation method in order to simulate such a system.
CLENET, Stephane   +3 more
core   +1 more source

Polymer Relaxation Time Enhancement at Temperatures above Glass Transition Temperatures Predicted by Idealized Mode-Coupling Theory

open access: yes, 2022
The mode-coupling theory of glass transition predicts the relaxation time divergence of glass-forming materials at the crossover temperature, which is approximately 1.2 times the calorimetric glass transition temperature. However, this divergence has not
Risa, Fukase   +5 more
core   +1 more source

Dielectric relaxation and dipole moment studies of hydrogen bonded complexes for enanthamide and valeramide with halogenated phenols using J-band microwave frequency

open access: yesMaterials Research Express, 2022
Dielectric investigations of hydrogen bonded complexes of Enanthamide and Valeramide with 4-bromophenol, 4-chlorophenol, 4-iodophenol and 4-fluorophenol in benzene were done at 303K, using a J-band (7.22GHz) microwave bench and dielectric relaxation ...
A Aathif Basha   +3 more
doaj   +1 more source

Quantitative association of cerebral blood flow, relaxation times and proton density in young and middle-aged primary insomnia patients: A prospective study using three-dimensional arterial spin labeling and synthetic magnetic resonance imaging

open access: yesFrontiers in Neuroscience, 2023
ObjectivesTo quantitatively measure the T1 value, T2 value, proton density (PD) value, and cerebral blood flow (CBF) in young and middle-aged primary insomnia (PI) patients, and analyze the correlations between relaxation times, PD, and CBF to explore ...
Xiao-Wen Luo   +6 more
doaj   +1 more source

Structural relaxation in silicate melts and non-Newtonian melt rheology in geologic processes [PDF]

open access: yes, 1989
The timescale of structural relaxation in a silicate melt defines the transition from liquid (relaxed) to glassy (unrelaxed) behavior. Structural relaxation in silicate melts can be described by a relaxation time, , consistent with the observation that ...
Dingwell, Donald B., Webb, Sharon L.
core   +1 more source

Optimum Pump Pulse Duration for X-Ray Ar-Plasma Lasing

open access: yesPhotonics, 2015
In plasma-driven X-ray lasers, it is critical to optimize the duration and time delay between pump pulses. In this study, we have done parametric simulations in order to systematically investigate the optimum time configuration of pump pulses.
Leili Masoudnia, Davide Bleiner
doaj   +1 more source

A Substitutive Coefficients Network for the Modelling of Thermal Systems: A Mono-Zone Building Case Study

open access: yesEnergies, 2021
A modelling approach based on the Substitutive Coefficients Network (SCN) is developed to predict the thermal behavior of a system in the dynamic state-space, without requiring knowledge of the thermal mass.
Lahoucine Ouhsaine   +3 more
doaj   +1 more source

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