Ecol1105015ZagainovaLO.fm

Abstract-The diet structure of Asian badgers (Meles leucurus Hodgson, 1847) on Bol'shoi Chukhtinskii Island (Samarovskii Chugas Nature Park, Khanty-Mansi Autonomous Area) was studied by means of copro logical analysis. Ten diet components were identified, including Siberian stone pine seeds (pine nuts), berries, earthworms, larval and adult insects, fishes, amphibians, reptiles, and mammals. The proportion of pine nuts was especially large. Seasonal fluctuations in the occurrence frequency and abundance of different foods were insignificant, but some of them were found to markedly vary between years

TechPhys10_09KurkinLO.fm

Abstract-Mechanisms underlying the formation and dynamics of a virtual cathode (VC) in a tubular elec tron beam subjected to a magnetic field are studied using a numerical 2D model. Two qualitatively different competing types of space charge dynamics near the VC are discovered. Which of them predominates depends on the magnetic field strength. The beam current critical density at which a nonstationary VC forms in the system is also strongly dependent on the magnetic field. It is shown that the optimal strength of the magnetic field that minimizes the beam current critical density depends on the Brillouin magnetic field

AppRes1105013SneginLO.fm

Abstract-On the basis of analysis of the morphological and genetical variability revealed by the method of gel electrophoresis of proteins, the state of gene pools of populations of modeling species Bradybaena fruti cum (bush snails) in conditions of influence of ore dressing combines is investigated. The authentic decrease of the level of heterozygosity and decrease of an allelic diversification in the researched bunches is fixed in comparison with the control populations, which is caused both by natural factors and by factors of the anthro pogenic parentage. The genetic automatic processes in populations are considered, and vectors of natural selection are defined. On the basis of calculation of the effective number, a forecast of the time of existence of populations is given

Cryst1106013KonLO.fm

Abstract-The possibilities of using Zernike phase contrast in hard X rays for imaging micropipes in a silicon carbide single crystal are analyzed by numerical simulation. Calculations are performed for the experimental conditions characteristic of third generation synchrotron radiation sources. A scheme is considered where the focusing element is a parabolic refracting lens and the phase shifting element is mounted at the point of the source image. It is shown that micropipe cross sections by a beam with a longitudinal diameter reaching 10 µm are imaged by the lens without distortions. At the same time, the lens makes it possible to magnify the image several tens of times. The cross sections that are significantly elongated along the beam are imaged with artifacts; however, their structure can also be recovered. It is shown that polychromaticity of radiation does not significantly affect the object imaging

PhysAtm5_10AkperovLO.fm

Abstract-Three methods for identification cyclones in extratropical latitudes of the Northern Hemisphere (NH) (20°-80° L) are compared based on reanalysis data for the fields of the sea level pressure (SLP). Different characteristics of extratropical cyclones, namely, their number, intensity, size, and lifetime, are analyzed. The effect of orographic effects for the identification of cyclones and their trajectories is evalu ated. The characteristics of extratropical cyclones are compared based on different reanalysis data (National Center for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR), ERA 40, and ERA INTERIM) with different spatial resolutions

TechPhLt1210021KoronovskiiLO.fm

Abstract-The phenomenon of generalized synchronization (GS) in networks with a complex topology of links between elements (nodes) representing chaotic dynamical systems has been studied. It is shown that GS onset in these networks can be detected as the moment of transition of the second order Lyapunov exponent from a positive to a negative value. The results of the analysis are confirmed by the nearest neighbor method. It is established that the network topology significantly influences the GS development

Ecol1_10PanovaLO.fm

Abstract-A comprehensive analysis of samples from a frozen peat deposit in the upper reaches of the Khadytayakha River by palynological, carpological, entomological, and radiocarbon methods has been per formed to reconstruct changes in the regional and local vegetation and climatic conditions during the Holocene. The results show that this peat deposit was formed from 8000 to 5000 years BP. During that period, the climate in the southern Yamal Peninsula was considerably warmer, and the present day subarctic shrub tundra zone was occupied by plant communities of spruce, birch, and larch forests

BullPhys1312007KurkinIILO.fm

Abstract-A numerical study of a low voltage vircator with controlled emissions from a thermocathode is performed for when an external signal effects on the electron beam and modulates the emission. The strong influence of the modulation parameters on characteristics of oscillations of the beam with virtual cathode is noted. It is shown that when the modulation frequency is tuned to the one of harmonics of a virtual cathode's free oscillations, there is a considerable increase in the power of high frequency harmonics of the virtual cath ode's free oscillations in the output spectrum