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Browsing ELibrary by Title
Now showing items 9246-9265 of 21936
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(2001)An analysis was carried out on the latitude distribution of the earthquake number and cumulative seismic energy, based on the NEIC catalogues (1900–1993). In addition to the well-known smooth maximum of the number and ...
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(2005)Contrary to Earth, the interior of terrestrial planets is poorly known. This is mainly related to the lack of seismic data and of planetary seismic networks on these planets. So far, despite several attempts, only the ...
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(2005)Water-soluble sulfate salts extracted from six CM chondrites have oxygen isotope compositions that are consistent with an extraterrestrial origin. The Δ17O of sulfate are correlated with previously reported whole rock δ18O ...
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(2001)Questions of terminology characterizing the ornamentation and porosity of foraminiferan tests are discussed. A new species Hedbergella accurata is described from the Upper Albian (Stolizkaia dispar Zone) of Baksan and Kheu ...
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(1999)Analysis of the taxonomic composition of planktonic foraminifers and oxygen isotope composition in their shells from the sedimentary core section V34-90, taken from the eastern slope of the Akademii Nauk SSSR Rise in the ...
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(1996)Specific problems in the design and analysis of seismic networks are considered and algorithms for their solution are discussed. Two problems are considered as examples: (1) seismic network analysis for the second phase ...
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(2004)The delta 13C value of fossil plant materials can be used to gain insight into the dominant photosynthetic pathway, as well as other environmental attributes, of ancient plant ecosystems. Nucleotide sequences from land ...
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(1988)
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(1997)The contribution of plants to the biogeochemical cycle of Si and related weathering processes was studied in an equatorial rainforest ecosystem (Congo) where the biologic turnover of Si is high (58 to 76 kg/ha/y). Litterfall ...
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(2001)The active role of higher plants in the weathering of silicate minerals and rocks is still a question for debate. The present work aimed at providing experimental evidence of the important role of a range of crop plants ...
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(2001)This series of four papers studies the complex dynamics of water-controlled ecosystems from the hydro-ecological point of view [e.g., I. Rodriguez-Iturbe, Water Resour. Res. 36 (1) (2000) 3-9]. After this general outline, ...
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(2001)A stochastic model for soil moisture dynamics at a point is studied in detail. Rainfall is described as a marked Poisson process, producing a state-dependent infiltration into the soil. Losses due to leakage and ...
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(2001)The reduction of soil moisture content during droughts lowers the plant water potential and decreases transpiration; this in turn causes a reduction of cell turgor and relative water content which brings about a sequence ...
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(2004)Based on plasma density data from the Cosmos-900 satellite we have analyzed the spatial distribution of the ionospheric turbulence in a form k−b, where k is wave number and b is the fractal index. In this case spatial ...
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(2003)We have studied the plastic deformation of Mg2SiO4 wadsleyite polycrystals. Wadsleyite was synthesized from a forsterite powder in a multianvil apparatus. It was then recovered and placed in a second multianvil assembly ...
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(2003)We have studied the dislocation microstructures that develop in (Mg0.9Fe0.1)2SiO4 wadsleyite deformed by simple shear at high pressure. The experiments were performed in a multianvil apparatus with the shear assembly ...
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(2003)Linear anisotropic elasticity has been applied to interpret the dislocation stability and ease of slip in wadsleyite. It is shown that wadsleyite is very isotropic from the elastic point of view. The influence of crystal ...
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(2004)Two distinct modes of compressive brittle-like failure are observed in laboratory samples of rock and ice. Under low to moderate confinement, terminal failure follows microcrack growth and interaction when damage is localized ...
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(1996)One of the more enigmatic features of the Earth's style of mantle convection is plate tectonics itself, in particular the existence of strike-slip, or toroidal, motion. Toroidal motion is uncharacteristic of basic thermal ...
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(2002)The Laurentian, Baltic, and Siberian blocks of the modern circum-Arctic were scattered across a broad area between 10°S and 30°N during the Late Ordovician. Closure of the Iapetus Ocean during the Ordovician and Early ...
Now showing items 9246-9265 of 21936