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Browsing ELibrary by Title
Now showing items 8304-8323 of 21936
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(2004)Aberrations of the extant species Equisetum hyemale L. are described. In one type of aberrations, the strobili are laterally disposed on short secondary shoots, thus resembling the arrangement of strobili in Mesozoic members ...
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(2001)Debye potentials and vector spherical harmonics were applied to a magnetostatic problem. By these mathematical methods it is shown that the inverse problem of the magnetostatics cannot be solved though the divergence of ...
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(2004)On the basis of new material on Permian somoholitids from the Subpolar Ural Mountains, the diagnosis of the genus Andrianovia is emended. The transition from Somoholites to Andrianovia is discussed. A new species Andrianovia ...
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(1999)Formulations and algorithms are considered for inverse problems in seismometry as expressed by Volterra integral equations of the first and second kind. Mathematical experiments were carried out to evaluate the resolution ...
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(2004)In this paper, an idealized model of the steady-state phase of the flow in a vertical conduit leading to a sand volcano eruption is developed from first principles. The model assumes that a sand-water mixture flows upwards, ...
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(2002)We study the effects of structural inhomogeneities on the stress and displacement fields induced by strike-slip faults in layered media. An elastic medium is considered, made up of an upper layer bounded by a free surface ...
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(2001)The present investigation measures the fractal dimensions of the fracture surfaces of the gabbro specimens fractured at various loading rates covering static and dynamic loading, and explores the relationship between the ...
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(2002)When performing Surface Nuclear Magnetic Resonance (SNMR) measurements in some regions of Russia where quite conductive layers are encountered, it has been observed that erroneous interpretations were sometimes made with ...
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ON THE ADVECTION OF SHARP MATERIAL INTERFACES IN GEODYNAMIC PROBLEMS: ENTRAINMENT OF THE D'' LAYER (2001)The D'' layer is a dense and chemically distinct layer at the base of the convecting mantle. Numerical modeling of the entrainment of this layer by mantle convection requires the solution of the advective transport equation ...
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ON THE AGE AND EXTENT OF THE MAXIMUM LATE PLEISTOCENE ICE ADVANCE ALONG THE BALTIC-CASPIAN WATERSHED (2004)In northwestern European Russia glacial limits are determined using both geomorphological and stratigraphical criteria. Until the late 1940s there was general agreement that a single Valdaian glaciation had followed the ...
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(1990)Our study of bryozoans has enabled us to date the Cretaceous-Paleogene boundary deposits more reliably. Of particularly great interest are the bryozoans from two sections far apart, where they occur in mass quantity: in ...
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(1990)The gneisses, granite-gneisses and migmatites on the shore of Kandalksha Bay, in the northwestern White Sea area, are traditionally assigned to the very old Saami complex of the Baltic shield. This article will discuss the ...
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(2004)The succession of ammonite assemblages in the central regions of the Russian Platform from the Virgatites virgatus Zone (Middle Volgian Substage) to the Surites tzikwinianus Zone (Ryazanian Stage) is discussed. The analysis ...
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(2002)Laminar entrainment of starting plumes with compositional buoyancy has been explored in a series of laboratory experiments. Two types of starting plume have been identified within the range of viscosity ratio εas of 10.4-856 ...
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(2002)The boron concentration in relictant hydrothermal ore-forming fluids captured in the mineral fluid inclusions from various hydrothermal deposits (gold, gold-platinum, tin, and some others) was studied. The fluid inclusions, ...
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(2003)A model that accounts for contributions to the total surface area (SA) by different size fractions of the soil is considered from a theoretical point of view. Calculations, based on continuous particle sizes and forms, ...
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(1999)The decomposition of the polynuclear Keggin Al13 species (Al13O4(OH)24(H2O)127+ or Al13) has been examined as a function of pH (2.06 =< pH =< 3.50), ionic strength (I = 0.1 and 1.0) and temperature (10°C =< T =< 65°C) using ...
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(2002)The state of the classification of benthic secreting Foraminifera is reviewed. The classification, which ranks the Foraminifera as a class, is modified using the criteria of Fursenko's systematics (morphological, ontogenetic, ...
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(2000)Cluster analysis has the potential to quantify the size and characteristics of groups or clusters of grains and crystals within a rock texture. We present two techniques: (1) the complete linkage hierarchical cluster ...
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(2001)A technique to generate integrated large-scale environmental maps of territories is put forward. It is based on analysis of the correlation between the ability of the natural environment to sustain the pressure of economic ...
Now showing items 8304-8323 of 21936