The force-distance curves of 12-2-12 and 12-4-12 Gemini quaternary ammonium bromide surfactants on mica and silica surfaces obtained by atomic force microscopy (AFM) were correlated with the structure of the adsorption layer. The critical micelle concentration was measured in the presence or absence of electrolyte. The electrolyte effect (the decrease of CMC) is significantly more pronounced fo...

We construct Birkhoff cones for dispersing billiards, which are contracted by the action of transfer operator. This construction permits study statistical properties not only regular billiards but also sequential (the billiard changes at each collision in a prescribed manner), open dynamics exits some region or dies when hitting obstacle) and many other examples. In particular, we include appli...

Poly(ethyl methacrylate) (PEMA) is dissolved in ethanol, known to be a non-solvent for PEMA, due the solubilizing ability of an added bile acid biosurfactant, lithocholic (LA). The avoid traditional toxic and carcinogenic solvents important fabrication composites biomedical applications. formation concentrated solutions high molecular weight PEMA key factor film deposition using dip coating met...

Abstract We study a continuous facility location problem on graph where all edges have unit length and the facilities may also be positioned in interior of edges. The goal is to position as many possible subject condition that any two at least distance $$\delta$$ δ from each other. investigate complexity this...

Dispersing billiards introduced by Sinai are uniformly hyperbolic and have strong statistical properties (exponential decay of correlations and various limit theorems). However, if the billiard table has cusps (corner points with zero interior angles), then its hyperbolicity is nonuniform and statistical properties deteriorate. Until now only heuristic and experiments results existed predicting...