Heat Transfer in a Plane Three-Layer System with a Not-Through Cross Connection

The regularities of formation of temperature fields in a plane three-layer system with a not-through cross connection (connector) are considered with boundary conditions of the second kind on one exterior surface of the system. The character of distribution of the temperature fields in the zone of influence of the steel connector is investigated experimentally. The results of the experiment are compared to the numerical solution of the problem with boundary conditions of the second and third kind on the interior surface of the wall. Their satisfactory agreement is shown.__________Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 78, No. 2, pp. 29–35, March–April, 2005.     

Radiochemical analysis of potable water from some underground sources of Leningrad oblast

Of the two existing radiochemical procedures for determining the isotope composition and specific activities of radionuclides in potable water (the first procedure was developed at the Center for Examining Water Quality and the second, at the Ramzaev Research Institute of Radiation Hygiene), the second procedure is more reliable. It was used for total radiochemical analysis of water from a series of underground artesian wells of north-western regions of Leningrad oblast.     

Influence of loads on the stress-strain state of aluminum-oxide ceramic cutting plates

The influence of point and distributed loads on the stress-strain state of aluminum-oxide ceramic cutting plates is investigated. The nonlinear properties of aluminum oxide and gray iron are taken into account.     

Modeling of heat and mass transfer in multilayer heat- and fire-insulating coatings under interaction with a high-temperature gas flow

A physicomathematical model is proposed for heat- and mass-transfer processes in intumescent multilayer heat- and fire-insulating coatings, with the moisture content distributed over the thickness. This model makes it possible to optimize the composition and structure of the layers in accordance with a given limit of fire resistance. We report results of numerical modeling of heat- and mass-transfer processes with allowance for evaporation, intumescence, and injection as applied to the conditions of operation of fire-protective systems exposed to the thermal action of a real fire. Translated fromFizika Goreniya i Vzryva, Vol. 34, No. 2, pp. 82–89, March–April, 1998.     

Influence of the structure of babbitt on the stress-strain state in the zone of friction contact

The methods of mathematical simulation are used to study the process of contact friction interaction for homogeneous lead and heterogeneous intact or run-in B16 babbitt. It is shown that the hard and soft structural components of the run-in babbitt strongly decrease the size of the zones of plastic deformation in the material, improve its wear resistance, and promote the increase in the operating reliability and service life of plain bearings. __________ Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 43, No. 6, pp. 27–30, November–December, 2007.     

Heat insulating objects reinforced with aluminosilicate fibers

Technology has been developed in NK-Teplokhimmontazh for heat insulating objects of aluminosilicate composition with high thermal shock resistance. Industrial tests have been performed and series production of objects has been assimilated. Material is recommended for use in furnaces of both continuous and batch operation.     

Optimal drug dosage subject to constraints

Translated from Kibernetika i Sistemnyi Analiz, No. 6, pp. 174–176, November–December, 1993.     

Aspirative lipectomy in patients with alimentary-constitutional obesity

The results of aspirative lipectomy in patients with 2nd and 3rd stage of alimentary-constitutional obesity are analysed. The effectiveness of lipectomy with surgical creation of a small ventricle and without previous surgery, has been demonstrated. The criteria of patients selection, based on their somatic and psychic features, are formulated. Aspirative lipectomy has certain advantages over other types of plastic surgery as it has the minimal rate of postoperative complications.