Investigation of hydrodynamic processes at multi-pulse power input into the channel of an electric discharge in liquid

The method of numerical experiments has been applied to specify the conditions under which pulsation pressure pulses are realized by combined electrodischarge systems in the plasma channel and the ambient liquid. It is shown that, on the basis of a main fixed power source, it is possible to establish a series of combined power sources ensuring the generation of uniform two-pulsation pressure pulses.     

The effect of the components of a complex load created by an electric discharge in water on a deflected mode of cast iron molds

The deflected mode of cast-iron molds under the effect of an electric discharge in water on the item’s surface is investigated using numerical methods. It has been found that the effect of the load created by an electric discharge channel on the variations in the deflected mode of the item is substantially higher than the hydrodynamic load.     

Information services in the implementation of the internal communication policy of an organization: Tendencies and perspectives of development

The development of an organization imposes high requirements on the traditional and innovation activities of information services (ISs) and requires them to solve new problems in human resource complex management. A new status and new functions for ISs are proposed. Instruments of internal communications, internal PR, a model of a portal project of an organization, and applied ISs are proposed. The consistency of using outsourcing is discussed and the objective reasons for involving outside organizations in the process of development and implementation of the complex information processes by an IS are emphasized.     

Electrical properties and limiting position of the fermi level in InSb irradiated with protons

The results of experimental and simulation studies of electrical parameters and the limiting position of the Fermi level in metallurgically and transmutationally doped InSb irradiated with protons (10 MeV, 2×10¹⁶ cm^?2, 300 K) are reported. It is shown that the limiting electrical parameters of irradiated InSb correspond to a p-type material. Special features of the annealing of radiation defects are studied in the temperature range 20–500°C.     

An automated system for selection of a constructional material

A method for comparison of different materials is proposed. The use of any, including difficult to compare criteria such as strength, production properties, cost etc. is allowed as the criteria to be compared. All of the information for comparison is arranged in the form of material-properties stable matrices. Each line of the matrix describes a single material with certain of its properties. The material for replacement is selected by cluster analysis using a coalescence algorithm.Selection of the information for filling the original material-properties table is made under automated conditions with use of a data bank of physicomechanical properties of materials. A problem of transfer of original data from a general-purpose information base to applied user programs is solved. A system for replacement of a constructional material is developed and examples of its functioning are given.Translated from Problemy Prochnosti, No. 12, pp. 67–73, December, 1990.     

Lower Oxidation States of f Elements: I. Preparation and Identification of Actinides and Lanthanides in Lower Oxidation States

Studies on the title subject, published mainly in the second half of the XX century and made both with macroamounts of lanthanides (Ln) and actinides (An) and with micro- and ultramicroamounts of radionuclides of these elements, are considered. Procedures for preparing f elements in lower oxidation states in solutions, melts, and solid matrices and methods for identifying these states (electrochemistry, spectrometry, high-temperature extraction, cocrystallization, etc.) are discussed.     

The Effect of Hydrophobization of Ag-Containing Zeolites on Absorption of CH3131I from the Water Vapor-Air Phase

The effect of hydrophobization of Ag-containing nonmodified and acetylene-modified zeolites with poly(vinyl chloride) (PVC) on sorption characteristics of sorbents with respect to CH₃ ¹³¹I was studied. The PVC coating on the sorbent results in increased absorbtion of CH₃ ¹³¹I from a water vapor-air flow at a humidity of up to approximately 70 vol %; the decontamination factor of approximately 10⁵ is reached. The sorbent modified with PVC retains radioiodine at heating to 300°C and can be proposed for practical purposes.     

Lower Oxidation States of <Emphasis Type="Italic">f</Emphasis> Elements: III. Properties of Low-Valence Lanthanide and Actinide Compounds in the Solid State and in Various Solvents

Properties of low-valence f-element compounds in the solid state and in protic, aprotic, and mixed solvents are discussed, including the solubility of low-valence f-element compounds, hydration of Ln²⁺ and An²⁺, and their complexation in aqueous and organic solutions with various anions (I^?, Br^?, Cl^?, ClO ₄ ^? , BF ₄ ^? , BPh ₄ ^? and polycyclic crown ethers.     

Electrical parameters of polycrystalline Sm<Subscript>1–<Emphasis Type="Italic">x</Emphasis> </Subscript>Eu<Subscript> <Emphasis Type="Italic">x</Emphasis> </Subscript>S rare-earth semiconductors

The electrical parameters of polycrystalline Sm_1–xEu_xS compounds are studied. The conductivity, concentration of free electrons, their mobility, and the conductivity activation energy are measured as functions of the quantity x. The structural parameters of the compounds are determined. A heterostructure is fabricated with x in the range from 0 to 0.3, and the electrical voltage generated by the structure, when heated to a temperature of T = 450 K, due to the thermovoltaic effect is measured. This voltage is found to be 55 mV. A method for measuring the thermally induced voltage is described. The method provides a means for separating the thermovoltaic effect from the Seebeck effect.