Abstract We report on a preliminary investigation of the non linear optical (NLO) properties and in particular dipole polarizability. The target species are two perfect tetrahedral nanoclusters Nb 4 B 18 Ta , along with their nanofullerene counterpart that is C 28 . Our study based density functionals (DFs) have gained popularity among scientific community. In addition we performed Hartree-Fock...

The Shortest Path Problem (SPP) is among the most studied problems in Operations Research, for its theoretical aspects but also because it appears as sub-problem many combinatorial optimization ...

The purpose of this study was to develop a model for the estimation of rock mass classification of Sarvak limestone in the Bakhtiari dam site, south-west (SW) Iran. Q system had been used as the starting point for the rock mass classification. This method was modified for sedimentary rock mass which is known as Qsrm. Because Qsrm considers a wide range of rock mass propert...

The concept of multiple murders (mm) is as old as humanity itself but it has only become prevalent in academic thought within the last three decades. Over this period scholars have introduced two main attitudes regarding multiple murders. Some argue that multiple murders are, theoretically and empirically, one concept that includes different sub-types: mass murder, spree murder, and serial murd...