Results 21 to 30 of about 475,511 (316)

Cerebral Microstructural Alterations in Patients With Early Parkinson’s Disease Detected With Quantitative Magnetic Resonance Measurements

open access: yesFrontiers in Aging Neuroscience, 2021
Objective: Parkinson’s disease (PD) is the second most common neurodegenerative disease in the elderly. In early stages of PD, patients typically display normal brain magnet resonance imaging (MRI) in routine screening.
Martin Klietz   +8 more
doaj   +1 more source

Dynamic properties of NH_3CH_2COOH·H_2PO_3 ferroelectric

open access: yesCondensed Matter Physics, 2018
Using a modified pseudospin model of NH_3CH_2COOH·H_2PO_3 ferroelectric taking into account the piezoelectric coupling with strains ε_i, ε_4, ε_5 and ε_6 within Glauber method in two-particle claster approximation, we have calculated components of ...
I.R. Zachek   +3 more
doaj   +1 more source

Dielectric Study of Lithium and Sodium Borophosphate Glasses

open access: yesCommunications, 2017
Ionic conductivity and dielectric properties such as dielectric permittivity and loss tangent for the samples of lithium and sodium borophosphate glasses were investigated using the electrical conductivity measurements in the range of frequency from 10 ...
Jana Mizerakova   +2 more
doaj   +1 more source

Dielectric properties of a bisimidazolium salt with dodecyl sulfate anion doped with carbon nanotubes

open access: yesBeilstein Journal of Nanotechnology, 2018
A new bisimidazolium salt with dodecyl sulfate as counterion has been designed and prepared. This salt shows a SmA phase that is stable at room temperature. The new ionic liquid crystal (ILC) was characterized by 1H NMR, 13C NMR and IR spectroscopy.
Doina Manaila Maximean   +2 more
doaj   +1 more source

Analysis of a Hyperbolic Heat Transfer Model in Blood-perfused ‎Biological Tissues with Laser Heating [PDF]

open access: yesJournal of Applied and Computational Mechanics, 2022
This paper proposes a hyperbolic heat transport model for a homogeneously perfused biological tissue irradiated by a laser beam. In particular, involving two local energy equations, one for the blood vessel and the other for the tissue, a non-Fourier ...
C.F. Munafo, P. Rogolino
doaj   +1 more source

Quantitative Cross Polarization Magic-Angle Spinning NMR Spectroscopy in Solids

open access: yesChinese Journal of Magnetic Resonance, 2020
The combination of cross polarization and magic-angle spinning (CP/MAS), is a routine technique for signal enhancement in solid-state nuclear magnetic resonance (NMR) spectrum. With CP/MAS, the acquisition efficiency of solid-state NMR experiments can be
LIANG Li-xin, DENG Feng, HOU Guang-jin
doaj   +1 more source

Dielectric Relaxation Spectroscopy and Synergy Effects in Epoxy/MWCNT/Ni@C Composites

open access: yesNanomaterials, 2021
The dielectric/electric properties of the Ni@C (carbon-coated Ni)/epoxy composites and Ni@C/MWCNTs (multi-walled carbon nanotubes)/epoxy composites loaded with fixed MWCNTs amount just below the percolation threshold (0.09 vol.%) and Ni@C at different ...
Darya Meisak   +4 more
doaj   +1 more source

Timed Automata Relaxation for Reachability [PDF]

open access: yes, 2021
AbstractTimed automata (TA) have shown to be a suitable formalism for modeling real-time systems. Moreover, modern model-checking tools allow a designer to check whether a TA complies with the system specification. However, the exact timing constraints of the system are often uncertain during the design phase.
Jaroslav Bendík   +3 more
openaire   +1 more source

Relaxation Times for Hamiltonian Systems [PDF]

open access: yesCommunications in Mathematical Physics, 2010
26 ...
A. Maiocchi, A. Carati
openaire   +3 more sources

Measuring and Modeling Viscoelastic Relaxation of the Lithosphere with Application to the Northern Volcanic Zone, Iceland [PDF]

open access: yes, 2010
Viscoelastic relaxation of the stress perturbation caused by an earthquake or diking event can produce measurable ground deformation over 100 km away from the source. We consider the role of viscoelastic relaxation in two different contexts.
DiCaprio, Christopher John
core   +1 more source

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