Taking into account the random scatterings due to random eigenfrequencies and random hopping matrices, we obtain the correlation functions for phonon and sound density fluctuations, which yield three and one entropy fluctuation modes at high frequencies, and three and one thermal conductivity at...

In this paper we calculate the constant pressure specific heat response of a water model with a liquid–liquid critical point. We show how, due to the existence of the critical point, there is a secondary maximum in the specific heat at some temperature T*Th for any pressure PPc, being Th the...

The magnetic properties (phase diagram, magnetization curve, spin correlation functions, internal energy and magnetic specific heat) of a decorated ferrimagnetic square lattice composed of three magnetic atoms are investigated on the basis of the differential technique. The system can show many...

We study the thermodynamics of metals by applying q-deformed algebras. We shall mainly focus our attention on q-deformed Sommerfeld parameter as a function of q-deformed electronic specific heat. The results revealed that q-deformation acts as a factor of disorder or impurity, modifying the...

Using Monte Carlo techniques, the two-dimensional site-diluted Ising model is studied. In particular, properties of the specific heat, its critical behaviour and the emergence of a non-singular maximum above the transition temperature at moderate concentration of defects, are discussed.

We investigate finite-temperature properties of chiral XY model on a one-dimensional lattice with an external magnetic field and a uniaxial potential by solving numerically the integral equation. We calculate the internal energy, the free energy, the winding number, the magnetization, the...

The accurate determination of the thermal properties of biomass materials is particularly important when studying biomass combustion processes. This paper reports a method for the determination of the maximum sampling error and the confidence intervals of thermal properties obtained from...

In the present study, phase change materials based on epoxy resin paraffin wax with the melting point 27 °C were used as a new energy storage system. Thermophysical properties and the process of melting of a PCM (phase change material) composite were investigated numerically and...

The temperature dependence of the heat capacity Cv of the boson gas is studied within the generalized quantum statistics. The generalized heat capacity (Cv)q is shown to increase strongly at all temperatures with increasing nonextensive parameter q. This (Cv)q behavior is used to reproduce the...

We consider the low-temperature specific heat spectra of long-range correlated quasiperiodic DNA molecules using a q-gaussian distribution, and compare them with those considering the Boltzmann-Gibbs distribution. The energy spectra are calculated using the one-dimensional Schrödinger equation...