The problem of the choice of optimal chemical composition of shipbuilding steel

The problem of the choice of optimal chemical composition of shipbuilding steel in the presence of several optimal criteria is considered. The solution of the problem is based on particular results of the theory of relative importance of criteria and uses particular numerical information on relative importance of criteria.     

Aggregation stability of mixtures of vacuum distillate and mazut

Chemistry and Technology of Fuels and Oils -     

The significance of gastric helicobacteriosis in the genesis hemorrhage from duodenal peptic ulcer

Based on a comprehensive analysis of findings from examination and surgical treatment of 196 patients with bleeding pyloroduodenal ulcers, it was found out that patients with concurrent helicobacteriosis of the stomach are prone to more unfavourable course of their illness, which fact is evidenced by a greater loss of blood and higher risk for bleeding recurrences. A classification is proposed by the authors, taking advantage of the data from endoscopic, microscopic and immunoenzymatic techniques, with the purpose of providing an assessment of degree of severity of helicobacteriosis of the stomach.     

Analysis of the Functioning of Automatic Synchronous Generator Excitation Regulators with Various Input Signals of Frequency Stabilization Channels in the Certification Scheme1

Power Technology and Engineering - Anecessary requirement for automatic excitation regulation systems is ensuring the stability of the electric energy systems (EES) and the required quality of the...     

Predicting Functioning Processes of Uniaxially Oriented Polymeric Materials

Fibre Chemistry - Traditionally, prediction of functioning processes of uniaxially oriented polymeric materials faces objective difficulties due to inhomogeneity of the rheological structure of...     

Physical Analysis of the Creep of Polypropylene and Polyvinylidene Fluoride Threads for Medical Purposes

Fibre Chemistry - Results are given for a study and modelling of short-term creep of polypropylene and polyvinylidene fluoride threads designed for medical purposes. A physical analysis is given...     

Modification of electronic properties of the surface of (100) silicon crystals under microwave plasma micromachining

The behavior of the effect of microwave plasma micromachining on electronic properties of (100) silicon crystal surfaces at weak adsorption was investigated. Model process mechanisms and factors providing stable modification of the electronic properties of the silicon surface by the formation of built-in surface potentials determined by chemical reactivity of the used working gases and modes of microwave plasma treatment were considered. The possibility in principle of the active formation of electronic properties of the surface of semiconductor crystals to extend their electrophysical and functional properties was shown.