The process of thermal-oxidative degradation polymer materials has been studied on the example polyethylene in presence quinones and / or nitroxyl radicals. synergistic effect positive action a mixture stabilisers from number radicals destructive established. It shown that rate significantly slowed down when an equimolecular 4-acetylamino-2,2,6,6-tetramethylhexahydropyridine-1-oxyl 2,6-di-tert-...

Ship maneuvering simulation is an important tool to predict the kinetic and kinematic properties of a vessel. It can estimate manoeuvrability vessel in advance optimize ship design avoid possible problems. Environmental effects including wind, wave, current are very disturbances from nature, which have great influence on However, it rather difficult evaluate their currently. In this work, wave ...

Under the action of externally-applied magnetic fields, a portion of magnetic particles was condensed out from the initially monodispersed magnetic fluid and formed into magnetic chains or columns, depending on the direction of the applied fields. These chains or columns evolved from a disordered phase to an ordered structural pattern as the field strength reached some critical value. It was fu...