Examples of non connective C*-algebras

We present an example of two infinite families of not connective groups. Both of them are generalized of the 3-dimensional Hantzsche-Wendt group.Comment: 6 pages

Simple model of the density of states in 1D photonic crystal

In this paper, we present a simple, yet versatile, analytical model of one-dimensional photonic crystal (1D PC). In our theoretical model, we take into account direction of propagation and therefore do not neglect anisotropic nature of photonic crystals. We derive analytical expressions for mode spectrum and density of states in 1D photonic crystal. With those formulas, we obtain mode spectrum characteristics, which depict formation of photonic band gap and reveal properties of photonic crystals.Comment: presented at SPIE International Congress on Optics and Optoelectronics, Warszawa, Poland, 28.08-2.09.200

Application of topological indices for description of pertraction in an agitated bulk liquid membrane system

The pertraction of benzoic acid in a bulk liquid membrane (BLM) was investigated. The effect of membrane solvent and presence of carrier (tri-noctylphosphine oxide TOPO) was examined. The liquid membrane was composed of hexane, heptane, octane, nonane, decane or dodecane. The results of experiments indicated that some selected topological indices of the membranę components can be used for quantitative description of linear correlation between fluxes and structure of organic solvent