Results 1 to 10 of about 1,315,814 (199)

Investigation of Surface Treatment of Carbon Fiber by Dynamic Method in the Polyurethane Composites [PDF]

open access: yesJournal of Chemical and Petroleum Engineering, 2022
Polyacrylonitrile (PAN)-based carbon fibers were chemically modified with a different ratio of Sulfuric acid (SA) to Nitric acid (NA), then reinforced Polyurethane (PU) composites in the presence of carbon fibers were prepared. The structural and surface
Mohamad Reza Pourhossainy   +4 more
doaj   +2 more sources

Applications of T1 and T2 relaxation time calculation in tissue differentiation and cancer diagnostics—a systematic literature review

open access: yesFrontiers in Oncology, 2022
IntroductionThe purpose of this review was to summarize current applications of non-contrast-enhanced quantitative magnetic resonance imaging (qMRI) in tissue differentiation, considering healthy tissues as well as comparisons of malignant and benign ...
Marta Micek   +4 more
doaj   +1 more source

Relaxation time approximations in PAOFLOW 2.0

open access: yesScientific Reports, 2022
Regardless of its success, the constant relaxation time approximation has limited validity. Temperature and energy dependent effects are important to match experimental trends even in simple situations.
Anooja Jayaraj   +3 more
doaj   +1 more source

Study of Parametric Interactions in the Nuclear Reactor Control with Feedback

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2021
This article considers the principal theoretical possibility of regulating a nuclear power reactor under changing operating modes conditions when external periodic disturbances take place in conditions of changing the operating mode.
V. V. Opiatiuk   +3 more
doaj   +1 more source

Dielectric properties of single wall carbon nanotubes-based gelatin phantoms [PDF]

open access: yesJournal of Advanced Dielectrics, 2018
In this work, we report the dielectric properties of Single wall Carbon Nanotubes (SWCNTs)-based phantom that is mainly composed of gelatin and water. The fabricated gelatin-based phantom with desired dielectric properties was fabricated and doped with ...
M. M. Altarawneh   +2 more
doaj   +1 more source

Temperature dependence of dielectric properties of the liquid crystal 6CB with the embedded Ag7GeS5I nanoparticles

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2020
Within the frequency range 10–1–105 Hz under the temperatures 293–295 K, the dielectric properties of a planar-oriented nematic liquid crystal 6CB with the embedded of 0.1% superionic conductor Ag7GeS5I nanoparticles have been investigated.
S.I. Poberezhets   +7 more
doaj   +1 more source

Approximate square-root-time relaxation in glass-forming liquids [PDF]

open access: yes, 2007
We present data for the dielectric relaxation of 43 glass-forming organic liquids, showing that the primary (alpha) relaxation is often close to square-root-time relaxation.
Albena I. Nielsen   +12 more
core   +3 more sources

A Review of Time Relaxation Methods

open access: yesFluids, 2017
The time relaxation model has proven to be effective in regularization of Navier–Stokes Equations. This article reviews several published works discussing the development and implementations of time relaxation and time relaxation models (TRMs), and how ...
Sean Breckling, Monika Neda, Tahj Hill
doaj   +1 more source

Relationship between Induced Polarization Relaxation Time and Hydraulic Characteristics of Water-Bearing Sand

open access: yesApplied Sciences, 2022
The induced polarization method has become a popular method for evaluating formation permeability characteristics in recent years because of its sensitivity to water and water-bearing porous media.
Zhao Ma   +7 more
doaj   +1 more source

Dielectric properties of nematic liquid crystal with impurities of supramolecular Ni-TMTAA-TCNQ complexes

open access: yesSemiconductor Physics, Quantum Electronics & Optoelectronics, 2020
Within the temperature range 288–343 K and frequencies 10–1–106 Hz, the dielectric properties of planar and homeotropic oriented nematic liquid crystal 6CHBT with the impurity of 0–3 wt.% Ni-TMTAA-TCNQ molecules have been investigated.
V.E. Vovk   +3 more
doaj   +1 more source

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