© Appl. Rheol. 20 (2010) 63293 DOI: 10.3933/ApplRheol-20-63293 Abstract: Bitumen is undoubtedly the most important material in the construction and rehabilitation of flexible road pavements. By increasing the temperature, bitumen changes from brittle solid, to viscoelastic solid and finally to Newtonian fluid. The rheological characteristics of bitumen also vary greatly due to aging, which is a...

in this paper, we calculate theoretically the relaxation rates of hot, thermal and antinodal quasiparticles by using fermi’s golden rule. the transition probabilities at low temperatures express in terms of bogoliubov coefficients, singlet and triplet scattering amplitudes and dimensionless landau parameters. the values of landau parameters may be determined by comparison with the experimental ...

Absorption of ultrasonic longitudinal waves in the nematic liquid crystal 1-(trans4-hexylcyclohexyl)-4-isothiocyanatobenzene (6CHBT) was measured in the temperature (24-56oC) and frequency (3.2-100 MHz) ranges. In the region of the phase transition the anomalous absorption has been observed. This absorption rapidly increases when the frequency of the ultrasonic wave decreases. The experimental ...

the effect of wheat-sorghum flour ratio (0, 25, 50, 75 and 100%) on viscoelastic and farinographic behaviour of dough was investigated. constants of peleg - normand model and the stress relaxation (% sr) was calculated for the variables and the correlation between farinograph characteristics and stress relaxation test parameters were evaluated. the results showed that with increasing the ratio ...

In this paper, we calculate theoretically the relaxation rates of hot, thermal and antinodal quasiparticles by using Fermi’s golden rule. The transition probabilities at low temperatures express in terms of Bogoliubov coefficients, singlet and triplet scattering amplitudes and dimensionless Landau parameters. The values of Landau parameters may be determined by comparison with the experimental ...

An adaptive procedure, based on Automatic Differentiation, for e..'itimating" good" values for the relaxation paramaters for general multi-dimensional problems is proposed.