The study of graphene thermal conductivity is of great importance, as its anomalous thermal and electrical conductivities (the largest among the all known materials so far) provide very good perspectives for graphene-based nanoelectronics devices. Thermal conductivity of graphene is phonon-based, since its electronic-based thermal conductivity represents less than 1% of the total thermal conduc...

Fully kinetic, vibrationally and continuum solvers with varying model fidelity are used in this work to the high-temperature relaxation of air 7230 15,000 K adiabatic heat baths a hypersonic flow over cylinder. The results show significant impact uncertainties vibrational times reaction rate constants on thermal chemical relaxation, particular, gas temperature species mole fractions. Most notab...

In this study, thermal fatigue properties of 400 series ferritic stainless steels have been evaluated in the temperature ranges of 200-800C and 200-900C. Systematic methods for control of temperatures within the predetermined range and measurement of load applied to specimens as a function of temperature during thermal cycles have been established. Thermal fatigue tests were conducted under ful...

The effect of thermal activation in planar Permalloy nanorectangles of thickness Lz 1⁄4 2:5 nm, width Ly 1⁄4 20nm and different in plane aspect ratios (r 1⁄4 Lx=Ly) has been analyzed assuming uniform magnetization in the sample at room temperature. The relaxation times were computed by integrating the Langevin equation in presence of external fields that reduce the energy barrier separating the...

Using resonant magnetic x-ray photon correlation spectroscopy, we show that the domains of a spiral antiferromagnet enter a jammed state at the onset of long-range order. We find that the slow thermal fluctuations of the domain walls exhibit a compressed exponential relaxation with an exponent of 1.5 found in a wide variety of solidlike jammed systems and can be qualitatively explained in terms...

The thermal and dielectric properties of the elastin network were investigated in arteries cultured with physiological and pathological concentrations of homocysteine, an aminoacid responsible of histological impairments in human arteries. The glass transition of this amorphous protein was investigated by Differential Scanning Calorimetry (DSC). To explore the molecular dynamics of the elastin ...

We have measured ' C and Na NMR spin-lattice relaxation times as a function of temperature in KCN and NaCN'in order to study the head-to-tail reorientations of the CN molecules in the two low-temperature ordered phases. We have combined our data with those of dielectric-response and ionic-thermal-conductivity measurements and have determined the correlation time ~, of the reorientations over mo...

We investigate phonon induced electronic dynamics in the ground and excited states of the negatively charged silicon-vacancy (SiV−) centre in diamond. Optical transition line widths, transition wavelength and excited state lifetimes are measured for the temperature range 4 K–350 K. The ground state orbital relaxation rates are measured using time-resolved fluorescence techniques. A microscopic ...