Effect of pulsed laser heating on the magnetic properties of amorphous alloy 30KSR

It has been established using magnetometric methods that irreversible magnetic anisotropy appears in the amorphous ribbon of a 30KSR alloy after pulsed laser heating in an external magnetic field. Effects of laser heatings on the physical properties of the alloy, in particular, on the Curie temperature and the temperature of crystallization have been studied. It has been shown that the direction of the arising magnetic anisotropy does not coincide with the field direction during laser heating. A mechanism of the appearance of the uniaxial magnetic anisotropy of amorphous ribbons during pulsed laser heatings in a magnetic field by regimes which do not lead to crystallization has been suggested.     

Optimization of computations

Translated from Kibernetika i Sistemnyi Analiz, No. 2, pp. 65–94, March–April, 1994.     

Simulation of Coupled Processes of Deformation and Cracking in Elastic Brittle Materials

We propose an approximate model of combined deformation and microcracking of elastic brittle materials leading to the formation of a system of stochastically distributed shallow microcracks.     

An approach to compiler construction for a general-purpose simulation language

The construction of a compiler for the NEDIS high-level simulation language is based on the reduction of the main parser algorithm by splitting the source language grammar into a set of subgrammars that allow application of classical parsing methods.Translated from Kibernetika i Sistemnyi Analiz, No. 5, pp. 117–121, September–October, 1991.     

Positron emission tomographic analysis of central dopamine D1 receptor binding in normal subjects treated with the atypical neuroleptic, SDZ MAR 327

Three in vitro assays (the isotopic semimicrotest [700 microl per well; 24-well plates], the isotopic microtest [200 microl per well; 96-well plates], and the rapid in vitro test) and the standard in vivo test for chloroquine resistance were compared for 99 clinical isolates of Plasmodium falciparum obtained from symptomatic African patients. The 50% inhibitory concentrations determined by the two isotopic tests were similar and were highly correlated (r = 0.965; P < 0.05), showing a high concordance between the semimicrotest and the microtest. There was a moderate agreement between these two isotopic tests and the in vivo test. Most of the discordant results were probably due to host factors, including reinfections, pharmacokinetic variations, and immunologic response, which are eliminated in in vitro assays. The rapid in vitro test based on the inhibition of chloroquine efflux in the presence of verapamil was poorly concordant with the other tests. Despite some discordant results, isotopic in vitro assays are useful to characterize the phenotypes of individual isolates without the interference of host factors and are complementary to in vivo evaluation of drug efficacy. However, in vitro assays need to be standardized to allow direct comparison of results between different laboratories.     

Effects of Sectorization on Cellular Radio Systems Capacity with Different Traffic Loads

The application of cell sectorization as a mean to improve a cellular radiosystem Signal-to-Interference Ratio (SIR), and hence capacity, is investigated.To assess the usefulness of sectorization, a lower bound to the Shannoncapacity of the uplink channel of a cellular systemis evaluated, with perfect channel state information (CSI) at the receiver,versus the reuse distance and the traffic loading. In the paper, two different rules for the use of sectored antennasare presented and analyzed in terms of their effect on system capacity.The sectorized system performance is compared with the performance ofa conventional system using omni-directional antennas at the base stations (BS).     

Reductions in inactivation rates of bacteriophages by clay minerals in lake water

Differences were noted in the rate of inactivation of bacteriophages in natural lake water, with the sequence of lability being φ11M15 of Staphylococcus aureus RN450, Qβ of Escherichia coli K-38 > 80α of S. aureus RN450 > P1 of E. coli B > T1 of E. coli B. The survival of φ11M15 in lake water was unaffected by autoclaving, filtration, or amendment with particulate humic acids or heat-killed cells of Erwinia herbicola, Sarcina lutea, and Saccharomyces cerevisiae. However, in the presence of attapulgite and vermiculite and, to a lesser extent, montmorillonite and kaolinite, the rate of inactivation of φ11M15 in natural, autoclaved, or filtered lake water was greatly reduced.     

Spectral Efficiency of Cellular Mobile Radio Systems with Different Traffic Loads

A lower bound on the Shannon capacity of the uplink channel of a narrowband cellular system is evaluated as a function of the reuse distance and the level of shadowing affecting the interfering signals assuming perfect channel state information (CSI) at the receiver. The effect of the first two tiers of interferers is determined, and compared with a simplified evaluation that takes into account only the first tier.Spectral efficiency is evaluated for different traffic loads, to assess the usefulness of traffic control. The performance improvementthat may be obtained by adopting the space diversity, to avoid deep fades in the received signal, is also evaluated. Our results show that traffic control may have a negative effect on the system performance.