An approach to segmentation of mouse brain images via intermodal registration

One way to perform a segmentation of the images of mouse brain sections is to register them to some reference images with known segmentation. We designed a new registration algorithm for this task. It is based on hierarchical mutual information maximizationand draws on several recent methods. Besides combining them in a novel way, we identify their weak spots and propose new ways to overcome them, resulting in a more robust performance.     

The Influence of a Flow of Low-Temperature Nitrogen Plasma on the Morphology,Electric Properties,and UV Photoconductivity of ZnO Films on Sapphire

Technical Physics Letters - We have studied the influence of a flow of high-enthalpy nitrogen plasma generated by a dc plasmatron on the morphology, electrical properties, and UV photoconductivity...     

Necessary optimality conditions for quasisingular controls in a step control problem

Necessary second-order optimality conditions are obtained for one class of optimal control problems for step systems. __________ Translated from Kibernetika i Sistemnyi Analiz, No. 1, pp. 101–115, January–February 2008.     

Effect of thallium doping on the parameters of localized states in <Emphasis Type="Italic">p</Emphasis>-GaSe single crystals

Experimental evidence is presented that, at temperatures from 167 to 250 K, electrical transport in undoped and thallium-doped p-GaSe single crystals is due to variable-range hopping. The main parameters of localized states in the band gap of p-GaSe〈T1〉 (0, 1, 2, and 2.5 mol % Tl) have been estimated as functions of doping level.     

Electrical,optical, and photoluminescence properties of ZnO films subjected to thermal annealing and treatment in hydrogen plasma

The photoluminescence and optical absorption spectra and electrical properties of ZnO films grown by the metal–organic chemical vapor deposition and hydrothermal techniques, subjected to heat treatments and plasma treatment in a hydrogen atmosphere, are studied. It is shown that the adsorption of oxygen at grain boundaries upon annealing in an oxidizing atmosphere determines the electrical properties of the films. Vacuum annealing improves the electrical properties of the samples after degradation induced by annealing in air. Treatment in hydrogen plasma passivates surface states at the grain boundaries. The intrinsic photoluminescence intensity after plasma treatment is higher in the case of increased amounts of oxygen adsorbed at grain surfaces upon annealing in air. Surface states involving oxygen and hydrogen atoms are responsible for the high-intensity intrinsic photoluminescence band.