Certain features of the cochleovestibular syndrome in the residual stage of traumatic brain disease

Caloric and rotation tests were applied to the study of the vestibular analyser in 84 patients in the residual state of traumatic disease of the brain. Vestibular disturbances of different degree revealed in 79 patients were as a rule accomplished by cochlear derangement. In the majority of patients the vestibular syndrome was supratentorial with the involvement of the diencephal-hypothalmic, subcortical, and cortical levels of the brain. Vestibular dysfunction correlated with such factors as severity of the sustained craniocerebral traum, duration of the posttraumatic period, and, particularly, with the character of the residual neurological syndrome. In accordance with the latter, it is recommended that vestibular disturbances be treated in the residual period of closed craniocerebral injuries with due regard for the principal pathophysiological mechanisms of the underlying neurological syndrome

DEVELOPMENT OF EQUIVALENT CONTACT INTERFACE FOR CALCULATING FORCED RESPONSE OF SYSTEMS

The article describes the importance of accounting the structural damping in the determination of the dynamic stresses in the bladed disks. The principle of operation of an equivalent contact interface is described. The paper presents a comparative analysis of the Coulomb friction model and the equivalent contact interface

CALCULATION-EXPERIMENTAL EVALUATION OF CARRYING CAPACITY OF A BLADE OF AXIAL TURBOMACHINE

The article describes the approach to verifying the deformation CAE model of the blade. The papers presents a comparative analysis of the results of computational research and experiment The effect of rotating the blade on its carrying capacity is described

Use of Technogenic Silica Fume and Brown Coal Semi-Coke in the Technology of Silicon Carbide

The paper describes thermodynamic experiments to determine the optimal temperature and time modes for the carbide production process from the briquette charge comprising silica fume and brown coal semi-coke, conditions for chemical enriching of silicon carbide, its phase, chemical and granulometric compositions and particle morphology

Ancient genomic time transect from the Central Asian Steppe unravels the history of the Scythians

The Scythians were a multitude of horse-warrior nomad cultures dwelling in the Eurasian steppe during the first millennium BCE. Because of the lack of first-hand written records, little is known about the origins and relations among the different cultures. To address these questions, we produced genome-wide data for 111 ancient individuals retrieved from 39 archaeological sites from the first millennia BCE and CE across the Central Asian Steppe. We uncovered major admixture events in the Late Bronze Age forming the genetic substratum for two main Iron Age gene-pools emerging around the Altai and the Urals respectively. Their demise was mirrored by new genetic turnovers, linked to the spread of the eastern nomad empires in the first centuries CE. Compared to the high genetic heterogeneity of the past, the homogenization of the present-day Kazakhs gene pool is notable, likely a result of 400 years of strict exogamous social rules.Introduction Results - The IA transition in the Kazakh Steppe - Admixture modeling of IA steppe populations - Post-IA genetic turnovers in the Kazakh Steppe - Dating ancient admixture - Present-day Kazakhs Discussion Material and methods - Radiocarbon dating - DNA extraction, library preparations, and sequencing - Modern DNA genotyping and quality controls - Ancient DNA data processing -- Raw data -- Authentication and contamination estimate -- Genotyping -- Sex determination -- Genetic relatedness estimation - Uniparental haplogroup assignment - Population structure analyses - Individual labeling and population grouping criteria - F-statistics and ancestry modeling - Admixture dating - CHROMOPAINTER and fineSTRUCTURE analyse

ИССЛЕДОВАНИЕ МЕХАНИЗМА ОБРАЗОВАНИЯ И СТРОЕНИЯ ВЫСОКОПОРИСТОГО ГУБЧАТОГО СЕРЕБРА

The methods of production and the results of investigation of high-porous spongy silver and morphology of its formation are presented. The product is shown to represent nanostructure consisting of silver particles of 100–200 nm in size, accreted with one another into conglomerates of branched forms. Examples of possible application of nanostructural high-porous spongy silver are given.Представлены методы получения и результаты исследования высокопористого губчатого серебра и морфологии его образования. Показано, что этот продукт представляет собой наноструктуру, состоящую из частиц серебра размером 100–200 нм, сросшихся между собой в конгломераты разветвленной формы. Даны примеры возможного использования наноструктурного высокопористого губчатого серебра

ИССЛЕДОВАНИЕ СТРОЕНИЯ И МЕХАНИЗМА ОБРАЗОВАНИЯ В ХЛОРИДНЫХ РАСТВОРАХ НИТЕВИДНЫХ СВИНЦОВЫХ ГУБОК

The results of experimental and theoretical researches of nanostructural filamentary lead sponge formation from chloride solutions are presented. It is established that such sponge with filament width of approximately 100 nm represents the hydrogen stabilized structure consisting of lead conglomerates (2-5 nm in size). The lead filamentary structure fragments are shown to remain unchanged in solid state for enough long time.Представлены результаты экспериментальных и теоретических исследований образования из хлоридных растворов наноструктурных нитевидных свинцовых губок. Установлено, что такая губка с толщиной нитей порядка 100 нм представляет собой структуру, состоящую из конгломератов свинца (размером 2–5 нм), стабилизированную водородом. Показано, что фрагменты нитевидной структуры свинца сохраняются в твердом состоянии достаточно продолжительное время

The Scarlet Flower

280hal.;20c