A study of orthographic self-control in junior schoolchildren with disabilities

The article presents the results of a study of the state of writing, orthographic knowledge and the level of orthographic self-control of junior schoolchildren with severe speech disorders (SSD), disorders of psychological development (DPD), and intellectual disability (ID). It describes the foundations on which the study of writing skills, orthographic knowledge and orthographic self-control of junior schoolchildren of various nosological groups (SSD, DPD and ID) is based. The article deals with the issue of teaching junior schoolchildren associated with the need to improve the conditions and methods of rehabilitation of writing disorders of junior schoolchildren with severe speech disorders, disorders of psychological development, and intellectual disability in order to organize their efficient learning and prevent school maladaptation.В данной статье представлены результаты исследования состояния письма, орфографических знаний и уровня орфографического самоконтроля младших школьников с тяжелыми нарушениями речи, задержкой психического развития и умственной отсталостью

Structure and phase composition of complex refractory coating and of the reaction zone of interaction with single-crystal alloy ZhS36-VI after high-temperature holds

A complex coating consisting of three layers, i.e., a gas-circulation coating and a two-layer ion-plasma coating with an internal Ni - Cr - Al - Ta - Re - Y layer and an external Al - Ni - Cr - Y layer for protecting single crystal turbine rotor blades from high-temperature oxidation is considered. The fine structure and the phase composition of the complex coating and of the reaction zone of interaction with single-crystal alloy ZhS36-VI after high-temperature holds in a range of 1050 - 1300 C for 1-1000 h are studied. © 2013 Springer Science+Business Media New York

Long-term strength of a composition of complex refractory coating and single-crystal rhenium-alloyed nickel alloy after high-temperature holds

The long-term strength of a system of single-crystal nickel alloy ZhS36-VI with Cr - Al gas circulation coating (GCC) + Ni - Cr - Al - Ta - Re - Yion-plasma coating (IPC) + Al - Ni - Cr - Yion-plasma coating (IPC) is analyzed under conditions close to the operating ones after a hold for 1 - 1000 h in a temperature range of 1050 - 1300 C. © 2013 Springer Science+Business Media New York

Optically controlled 2D tunnelling in GaAs delta-doped p-n junction

A new type of an optically controlled tunnelling process in a specially designed Esaki diode is investigated. The additional peak appears due to tunnelling of 2D electrons accumulated at ground state of delta doped layers embedded nearby the p-n junction into the valence band of the p⁺-contact. It is found that the voltage position of an additional resonant peak shifts to lower bias voltage with increasing both incident light intensity and temperature. Our experimental data and theoretical simulations show that this shift is a result of an electrical field redistribution in the region of the p-n junction caused by non-equilibrium carriers generated with optic or thermal excitation

Motor Deficits and Decreased Striatal Dopamine Receptor 2 Binding Activity in the Striatum-Specific Dyt1 Conditional Knockout Mice

DYT1 early-onset generalized dystonia is a hyperkinetic movement disorder caused by mutations in DYT1 (TOR1A), which codes for torsinA. Recently, significant progress has been made in studying pathophysiology of DYT1 dystonia using targeted mouse models. Dyt1 ΔGAG heterozygous knock-in (KI) and Dyt1 knock-down (KD) mice exhibit motor deficits and alterations of striatal dopamine metabolisms, while Dyt1 knockout (KO) and Dyt1 ΔGAG homozygous KI mice show abnormal nuclear envelopes and neonatal lethality. However, it has not been clear whether motor deficits and striatal abnormality are caused by Dyt1 mutation in the striatum itself or the end results of abnormal signals from other brain regions. To identify the brain region that contributes to these phenotypes, we made a striatum-specific Dyt1 conditional knockout (Dyt1 sKO) mouse. Dyt1 sKO mice exhibited motor deficits and reduced striatal dopamine receptor 2 (D2R) binding activity, whereas they did not exhibit significant alteration of striatal monoamine contents. Furthermore, we also found normal nuclear envelope structure in striatal medium spiny neurons (MSNs) of an adult Dyt1 sKO mouse and cerebral cortical neurons in cerebral cortex-specific Dyt1 conditional knockout (Dyt1 cKO) mice. The results suggest that the loss of striatal torsinA alone is sufficient to produce motor deficits, and that this effect may be mediated, at least in part, through changes in D2R function in the basal ganglia circuit

Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine 8 PACS 85

Abstract. We consider the features of formation of AuTiPd ohmic contacts to p + -Si. Metallization was made by vacuum thermal sputtering of Pd, Ti and Au films onto the Si substrate heated up to 330 С. It is shown that the contact resistivity increases with temperature; this is typical of metallic conductivity. We suggest that the ohmic contact is formed owing to appearance of shunts at Pd deposition on dislocations or other structural defects. The number of shunts per unit area is close to the measured density of structural defects at the metalSi interface