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Browsing ELibrary by Title
Now showing items 8143-8162 of 21934
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(2004)The paper reviews the work done in the course of the COST 271 Action concerned with the development of tools and methods for forecasting, nowcasting and warning of ionospheric propagation conditions. Three broad categories ...
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(1997)When Li-saturated montmorillonite is heated to 200-300 ~ the Li ions migrate from inter- layer positions to sites in the layer structure. However, the identity of these sites has not been clearly established. Here we have ...
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(2002)The proton Magnetic Resonance Sounding (MRS) is a geophysical technique specially designed for hydrogeological applications. It is based on the principle of Nuclear Magnetic Resonance (NMR) and allows the non-invasive ...
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(2003)Zunyite [Al13Si5O20(OH,F 18Cl] possesses an unusual combination of an Al13O16(OH)24 Keggin structure and a Si5O16 pentamer unit. We used 19F, 27Al, 29Si MAS and 27Al MQMAS NMR spectroscopy of a series of samples with varying ...
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(2004)This review describes nuclear waste forms for high-level waste (HLW), that is, glasses, ceramics, and glass-ceramics, as well as for low- and intermediate-level waste (LILW), that is, cement, bitumen, glass, glassy slags, ...
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(1989)When gold interacts under natural conditions with microorganisms, it is either concentrated, or dispersed. Our experiments have already shown that heterotrophic microorganisms can generate 'new' gold both on its original ...
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(1998)The micro-inclusions located in the genetic centre of Yakutian diamond monocrystals have been studied using optical (anomalous birefringence, photoluminescence, cathodoluminescence) and microanalytical (electron-microprobe, ...
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(1997)Crystals of (Ba,Sr)CO3, Ba(SO4,CrO4), (Ba,Sr)SO4, and (Cd,Ca)CO3 solid solutions were obtained by counterdiffusion of reactants through a column of porous silica hydrogel. For each system, a set of experiments, starting ...
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(2005)Stepwise dissolutions of the carbonaceous chondrites Orgueil (CI), Murchison (CM) and Allende (CV) reveal large nucleosynthetic anomalies for Zr isotopes that contrast with the uniform compositions found in bulk meteorites. ...
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(2004)The strong uncertainty inherent in the traveltime inversion of first arrivals from surface sources is usually removed by using a priori constraints or regularization. This leads to the -space (data-independent model ...
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(2004)The total number of oil and gas pools in a province is approximated by the Weibull distribution. The statistical performances of this number are related to the parameters of a truncated Pareto distribution. The total number ...
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(2002)This paper uses the concept of anisotropic damage mechanics to analyze dynamic responses of a granite site under blasting loads. An anisotropic continuum damage model is suggested to model rock mass behavior under blasting ...
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(2002)This paper reports the second part of the study carried out by the authors on the underground explosion-induced stress wave propagation and damage in a rock mass. In the accompanying paper reporting the first part of the ...
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(2004)Evolution of the Earth's mantle from a hot initial state is modelled in the Boussinesq approximation within the framework of a thermochemical model. The spatial dynamics of substance within a spherical layer is illustrated ...
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(2004)Full-scale numerical modeling of the geodynamic evolution of the Earth throughout its existence is performed in terms of the thermochemical model of mantle convection proposed by the authors. Numerical modelling results ...
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(2004)We present finite-difference simulation results that lend new insight into the behavior of multicomponent induction logging tools when in the presence of anisotropic layers, boreholes, and invasion zones. We use four ...
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(2004)This paper deals with the numerical analyses on the effect of inhomogeneities (highly conductive layers) on the propagation of seismogenic electromagnetic signals in the ULF/ELF range. For simplicity of computations we ...
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(2000)Calculation of an 40Ar/39Ar age involves several sources of systematic (external) and statistic (mostly instrumental) errors that should be propagated into the final result for a proper statistical assessment of the age ...
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(2002)Combining a geological model with a geomechanical model, it generally turns out that the geomechanical model is built from units that are at least a 100 times larger in volume than the units of the geological model. To ...
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(1999)A one-dimensional TEM problem is solved with regard for wave processes in a nonmagnetic medium. Based on the disturbance and conjugate-equation methods, functions of the field sensitivity to model parameters (Frechet ...
Now showing items 8143-8162 of 21934