in this paper, the radial breathing mode (rbm) frequencies of multi-walled carbon nanotubes (mwcnts) are  obtained based on the multiple-elastic thin shell model. for this purpose, mwcnt is considered as a multiple concentric elastic thin cylindrical shells, which are coupled through van der waals (vdw) forces between two adjacent tubes. lennard-jones potential is used to calculate the vdw forc...

in this paper, thermo-elastic analysis of a rotating thick truncated conical shell subjected to the temperature gradient, internal pressure and external pressure is presented. given the existence of shear stress in the conical shell due to thickness change along the axial direction, the governing equations are obtained based on first-order shear deformation theory (fsdt). these equations are so...

Problems connected with the long version of atom-based Periodic System of chemical elements with arbitrary 1–18 group numbering recommended by IUPAC are discussed. Introducing the atomic cores of elements instead of atoms to the Periodic Table enables to define unequivocally the Periodic System as a triparametric classification resulting from three numbers: the number of core electron shells n,...

Recent data indicate that Torsolike, a spatial cue for patterning terminal structures of a Drosophila embryo, is stably anchored in the fruitfly eggshell; an as yet unidentified factor is required for the high activity of Torsolike at the embryo termini.

The paper sets up a nesting spatial regression model incorpora ting heteroskedastic shocks, and discusses hypothesis testing in both nested and nonnested cases in a quasi-likelihood framework, suggesting directions for future research effort. JEL classification: C21.

Core-shell nanostructures are emerging as more important materials than alloy nanostructures and have much more interesting potential applications in various fields. In this work, we demonstrated the fast and facile synthesis of core-shell nanoparticles consisting of Pt thin layer as the shell and Ni nanoparticles as the cores. The described method herein is suitable for large-scale and low-cos...

objectives: almond (prunus amygdalus) hull and shell are agricultural by-products that are a source of phenolic compounds.the processing of almond produce shell and hull, accounts for more than 50% by dry weight of the almond fruits. recently, more studies have focused on the influence of storage conditions and postharvest handling on the nutritional quality of fruits, especially the antioxidan...

We describe the procedure to start an SCF calculation of the general type from a sum of atomic electron densities, as implemented in GAMESS-UK. Although the procedure is well known for closed-shell calculations and was already suggested when the Direct SCF procedure was proposed, the general procedure is less obvious. For instance, there is no need to converge the corresponding closed-shell Har...