Classical verigin problem as a limit case of verigin problem with surface tension at free boundary

In this psper we consider Verigin problem with surface tension st free     

Hamiltonian cycles in 1-tough graphs

For a graphG, let ₃ = min{ _i=1 ³ d(u_i): {u₁, u₂, u₃} is an independent set ofG} and = min{ _i=1 ³ d(u_i) – is an independent set ofG}. In this paper, we shall prove the following result: LetG be a 1-tough graph withn vertices such that ₃ n and – 4. ThenG is hamiltonian. This generalizes a result of Fassbender [2], a result of Flandrin, Jung and Li [3] and a result of Jung [5].Supported in part by das promotionsstipendium nach dem NaFöG and the Post-Doctoral Foundation of China.     

Kinetics issues of CuBr lasers with added hydrogen

A computational kinetics model of the CuBr laser with added hydrogen is presented. The space-time behaviour of the lasers and lasants is described in detail. Besides the discharge field, it is confirmed that the dissociation/recombination of the CuBr molecule plays an important role in the plasma electron temperature. The radial field, which peaks at 30% of the discharge field and has two opposite directions along the radius, results in the skin of electron density and the black centre of the large-bore laser beam.     

Synthesis and Structure of Perfluorocongressane

Perfluorocongressane was synthesized using elemental fluorine and characterized by mass spectra, (19)F NMR, and X-ray crystallography.     

Nondiagonal seed universes and a network of double gravitational soliton universes

By using the double Ehlers transformations and transformations, new non-diagonal seed solutions are obtained. From these seed solutions we obtain a network of double gravitational soliton solutions. The double gravitational inverse scattering method is used to give some concrete examples of new solutions.