Structural features of the lower permian salt-bearing series and the character of salt-tectogenesis manifestations in the northern and northwestern margins of the Сaspian depression. Paper 1

The detailed evaluation of the accumulated geological-geophysical data, particularly on the inner structure of the saltbearing series in the margins of the Caspian Depression, the mechanism of salt-tectogenesis manifestation, its reflection in the structure of the salt table and association with the structural inhomogeneities of the subsalt bed is presented. The authors attempt to acquire additional indirect criteria for predicting the structure of the subsalt bed by means of analyzing the structure of the salt-bearing series and the character of salt-tectogenesis manifestation. The problem solution is based on the complex analysis of the data from drilling and seismic prospecting.

Geophysical research of the rock massif in underground mine conditions

Geophysical methods of research of rock mass are one of the most effective ways of solving various problems in mining and are widely used in mining, gas and oil industry, as well as in science. They allow remote search and assessment works, detection of structural inhomogeneities, voids, contact zones of various media in the rock mass with sufficient high accuracy. The article presents research and comparative analysis of geophysical methods of geophysical sensing and spectral seismo-profiling in underground mine conditions with determination of permissible tasks for which these methods are capable. In complex geophysical studies, methods of spectral seismo-profiling and geo-radar sensing in underground mine conditions have been applied. Measurements were made to search for different objects and at different angles to the object being searched. The use of geophysical methods made it possible to detect the metal shelf under the bulked rock mass with the separation of the boundaries of two tiers of the shelf during vertical measurements. In the process of searching for the underlying excavation in the mass during vertical geophysical measurements, which were carried out 20 meters from the shaft, a change in spectrum density at a depth of about 55 m was detected, which coincides with the actual location of the required mine working. The results of the search for caverns in the rock mass, when taking measurements at an angle to the object sought, showed the absence of sufficiently explicit boundaries of the caverns.

Electronic and excitonic properties of ultrathin (In,Ga)N layers: the role of alloy and monolayer width fluctuations

Atomistic many-body calculations reveal that small structural inhomogeneities in ultrathin (In,Ga)N layers may lead to indirect excitons.

Evidence of Structural Inhomogeneities in Hard-Soft Dimeric Particles without Attractive Interactions

We perform Monte Carlo simulations of a simple hard-soft dimeric model constituted by two tangent spheres experiencing different interactions. Specifically, two hard spheres belonging to different dimers interact via a bare hard-core repulsion, whereas two soft spheres experience a softly repulsive Hertzian interaction. The cross correlations are soft as well. By exploring a wide range of temperatures and densities we investigate the capability of this model to document the existence of structural inhomogeneities indicating the possible onset of aggregates, even if no attraction is set. The fluid phase behavior is studied by analyzing structural and thermodynamical properties of the observed structures, in particular by computing radial distribution functions, structure factors and cluster size distributions. The numerical results are supported by integral equation theories of molecular liquids which allow for a finer and faster spanning of the temperature-density diagram. Our results may serve as a framework for a more systematic investigation of self-assembled structures of functionalized hard-soft dimers able to aggregate in a variety of structures widely oberved in colloidal dispersion.