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An iterative approach to the phonon Boltzmann equation in the theory of thermal conductivity
Abstract A new iterative approach to the solution of the Boltzmann equation is presented. The convergence of the iteration procedure is checked in reference to an isotropic solid subjected to aExpand
Beyond the isotropic-model approximation in the theory of thermal conductivity.
By the use of an iterative method the linearized phonon-Boltzmann equation for a dielectric solid subjected to a thermal gradient is solved and it is possible to calculate the thermal conductivity of rare-gas solids starting from the pair potential and accounting for the real Brillouin zone of the lattice. Expand
On the isotope effect in thermal conductivity of silicon
The thermal conductivity κ(T) of single crystals of silicon with two different isotopic compositions: natural and 99.983% enriched 28Si, was investigated in the temperature range from 0.5 K to 300 K.Expand
Using fractional differentiation in astronomy
In a recent paper, published at arXiv:0910.2381, we started a discussion on the new possibilities arising from the use of fractional differential calculus in image processing. We have seen that theExpand
Recurrence plots of sunspots, solar flux and irradiance
The paper shows the recurrence and cross recurrence plots of three time series, concerning data of the solar activity. The data are the sunspot number and the values of solar radio flux at 10.7 cmExpand
The GNU Image Manipulation Program Applied to Study the Sand Dunes
GIMP, the GNU Image Manipulation Program, is discussed, which allows remote measure and control of the dunes and its features can be applied to study the sand dunes. Expand
Polypyrrole-coated Nonwovens for Electromagnetic Shielding
Several shielding applications, to protect human health and electronic devices against dangerous effects of electromagnetic radiation, require solutions that fabrics can suitably fulfill. Here, weExpand
Stability of Proteins in Carbohydrates and Other Additives during Freezing: The Human Growth Hormone as a Case Study.
Molecular dynamics simulations are used to elucidate the mechanism of protein stabilization by carbohydrates and other additives during freezing, and it is found that the preferential exclusion and vitrification mechanisms are important during the whole freezing process, while water replacement becomes dominant only toward the end of the cryoconcentration phase. Expand
Considerations on Protein Stability during Freezing and its Impact on the Freeze Drying Cycle: A Design Space Approach.
It is shown how mathematical models, and a design space approach, can guide the selection of the optimal freezing protocol, focusing on protein stability, for protein stability during freezing and freeze drying of biopharmaceuticals. Expand
Astronomical image processing based on fractional calculus: the AstroFracTool
The AstroFracTool is proposed, developed to provide a simple yet powerful enhancement tool-set for astronomical images, that works evaluating the fractional gradient of an image map. Expand