Int erp retation of magneto telluri c data over inhomogeneous geolog­ ical st ructures is st ill a challenging problem in geophysical exploration. We have developed a new 3-D MT inversion method and a computer code based on full nonlinear conjugate gradient inversion and quasi­ analyt ical approximation for forward modeling solut ion. Appli cat ion of the QA approximation to forward model ing a...

The geometrical inward inversion studies were planned on the metallic shell geometries. These geometries are circular in shapes. They are closed at the top and open at the bottom. In between top and bottom faces, the geometrical features are changed from sample to sample. Feature changes are in shape, apical angle, steps, thickness etc. Studies were made to see how these features play role in i...

An experimental study of the phase inversion behavior of liquid-liquid dispersion has been conducted in a spray extraction column for systems of toluene / water, n-hexane/water, CCl4/water, toluene /water + glycerol (25 % wt), toluene + CCl4 (25 % wt) / water and toluene / acetic acid (5 % wt)/water. The effects of physical properties, mass transfer and column geometry...

Populations of Drosophila subobscura from the urban area of Belgrade and from the locality, Deliblato, which is not under strong anthropogenic influence, were studied with the aim to characterize and compare their genetic structure by examining chromosomal inversion polymorphism. Additional analysis and comparison of this type of polymorphism with several other populations from different habita...

We sampled Anopheles funestus Giles mosquitoes from 10 sites in Kenya to determine (1) the different members of this group present at these sites and (2) the population genetic structure of these species based on chromosomal inversion karyotypes with particular reference to the role of the Eastern arm of the Great Rift Valley and geographical distance as barriers to gene flow. Four members of t...

This article presents some theorems about functor structures. We start with some basic lemmata concerning the composition of functor structures. Then, two theorems about the restriction operator are formulated. Later, we show two theorems stating that the properties ’full’ and ’faithful’ of functor structures which are equivalent to the ’onto’ and ’one-to-one’ properties of their morphmaps, res...

Aims. The thermodynamic and magnetic field structure of the solar photosphere is analyzed by means of a novel 3-dimensional spectropolarimetric inversion and reconstruction technique. Methods. On the basis of high-resolution, mixed-polarity magnetoconvection simulations, we used an artificial neural network (ANN) model to approximate the nonlinear inverse mapping between synthesized Stokes spec...

In this work, a particle-based Monte Carlo model is used to quantify the potential of terahertz sources based on the ZnO-based material system relative to existing devices based on GaAs/AlGaAs quantum wells. Specifically, two otherwise identical quantum cascade structures based on ZnO/ MgZnO and GaAs/AlGaAs quantum wells are designed, and their nonequilibrium carrier distributions are then comp...

The ability of helical macrofibers of Bacillus subtilis to convert from left- to right-handed structures or vice versa has been known to be controlled by the nutritional environment (N. H. Mendelson, Proc. Natl. Acad. Sci. U.S.A., 75:2478-2482, 1978). lyt mutants (Ni15, FJ3, FJ6, and FJ7) and also lyt phenocopies of wild-type strain FJ8 were able to undergo helix hand inversion as a function of...