Frequency-time method of correcting measurements of the radiation patterns of antennas

This article examines the mathematical aspects of a method developed for frequency-time correction of distortions of radiation patterns recorded in a closed range with partial echo suppression. The efficiency of the method is analyzed with allowance for the dimensions of the range and the bandwidth of the test antenna. Translated from Izmeritel'naya Tekhnika, No. 12, pp. 44–46, December, 1996.     

The course and outcome of viral hepatitis B in drug-addicted patients

In this paper, characterization is given of clinical and biochemical features of VH B course against the background of narcomania. Recordable in such patient populations are high percentage of delta hepatitis (14.2%), unusual severity of the intoxication syndrome, protracted course with exacerbations (12.2%) and recurrences (8%), outcome being a chronic hepatitis (14.2%), slower normalization of biochemical indicators, persistently low ratio of AIAT activity in diluted and whole blood sera. The persistence of viral markers in drug addicts discharged from the hospital (68%) is fraught with danger of spreading viral hepatitis of prophylactic measures are not strictly observed.     

The structure of Alu-like DNA nucleotide sequences in cyclostomes and fishes

By methods of DOT hybridization and polymerase chain reaction (PCR) structures similar to Alu repeats were shown in the genome of fish and lamprey. The fact of the presence of such sections in representatives of many orders of fishes, and also our experimental data allow to suppose that Alu-like structures, similar to 3' region of Alu repeats on mammals, have been already formed in these. The evolutionary significance of described structures has been supposed.     

The method of testing of XLPE cable insulation resistance to partial discharges and electrical treeing

The paper gives a method of model XLPE medium voltage cable insulation testing for partial discharges and electrical treeing with a point to plane test geometry. Based on this method, a comparative estimate of insulation resistance to treeing and partial discharges have been made. XLPE crosslinked by different methods (steam medium and hot nitrogen medium) and with varying contents of inorganic filler kaolin were tested. The characteristics of partial discharges were measured by means of a pulse height analyser characterized with a microscope. The data have been analysed statistically.     

An approximate method for the calculation of heat and mass exchange between gas and a liquid film

Using integral relations between the velocity and enthalpy of gas, we develop an engineering method for the calculation of the local and average parameters of media and the heat and mass flux without using the empirical data about contact instruments.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 53, No. 2, pp. 191–198, August, 1987.