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Dive into the research topics where A. Bolshakov is active.

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Featured researches published by A. Bolshakov.


Perception | 2015

Smooth Pursuit in Elderly Adults Studied With Apparent Motion.

Valentina P. Bozhkova; Nadezhda S. Surovicheva; Dmitry P. Nikolaev; Ilya P. Nikolaev; A. Bolshakov

The variability of smooth pursuit eye movements was studied in a group of healthy subjects for horizontal apparent motion by a method that does not require direct measurements of eye movements. It was found that the individual smooth pursuit efficiencies for binocular perception in group of healthy elderly subjects (mean age 61 years) as well as in the group of healthy young adults were distinctly differentiated. Furthermore, we have not detected any age-related decrease in the fraction of subjects showing high smooth pursuit efficiencies. This fact demonstrates that the human oculomotor system is relatively resistant to the effects of aging. At the same time, an appreciable increase of percentage of persons with directional asymmetry of smooth pursuit has been found among elderly adults. A higher smooth pursuit efficiency was noticed reliably more often in the direction from left to right rather than in the opposite direction. Subject eye movements were recorded with i-View XTM Hi-Speed 1250 eye tracking system (SMI Inc.). These records confirmed that the smooth pursuit accuracy of older adults is less than that of young persons, at least in some directions of tracking.


Perception | 2015

The Influence of Monocular Spatial Cues on Vergence Eye Movements in Monocular and Binocular Viewing of 3-D and 2-D Stimuli.

Anton A. Batvinionak; Maria Gracheva; A. Bolshakov; Galina I. Rozhkova

The influence of monocular spatial cues on the vergence eye movements was studied in two series of experiments: (I) the subjects were viewing a 3-D video and also its 2-D version—binocularly and monocularly; and (II) in binocular and monocular viewing conditions, the subjects were presented with stationary 2-D stimuli containing or not containing some monocular indications of spatial arrangement. The results of the series (I) showed that, in binocular viewing conditions, the vergence eye movements were only present in the case of 3-D but not 2-D video, while in the course of monocular viewing of 2-D video, some regular vergence eye movements could be revealed, suggesting that the occluded eye position could be influenced by the spatial organization of the scene reconstructed on the basis of the monocular depth information provided by the viewing eye. The data obtained in series (II), in general, seem to support this hypothesis.


MRS Proceedings | 2009

MESFETs on H-terminated Single Crystal Diamond

Paolo Calvani; M. Rossi; Gennaro Conte; Stefano Carta; E. Giovine; B Pasciuto; Ernesto Limiti; Federica Cappelluti; V.G. Ralchenko; A. Bolshakov; G. Sharonov

Epitaxial diamond films were deposited on polished single crystal Ib type HPHT diamond plates of (100) orientation by microwave CVD. The epilayers were used for the fabrication of surface channel MESFET structures having sub-micrometer gate length in the range 200-800 nm. Realized devices show maximum drain current and trasconductance values of about 190 mA/mm and 80 mS/mm, respectively, for MESFETs having 200 nm gate length. RF performance evaluation gave cut off frequency of about 14 GHz and maximum oscillation frequency of more than 26 GHz for the same device geometry.


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2015

Three-dimensional graphite electrodes in CVD single crystal diamond detectors: Charge collection dependence on impinging β-particles geometry

G. Conte; P. Allegrini; M. Pacilli; S. Salvatori; T. Kononenko; A. Bolshakov; V. Ralchenko; Vitali I. Konov


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2014

Beta particles sensitivity of an all-carbon detector

M. Pacilli; P. Allegrini; G. Conte; E. Spiriti; V.G. Ralchenko; M. Komlenok; A. Bolshakov; A.A. Khomich; Vitali I. Konov


international conference on perspective technologies and methods in mems design | 2009

Diamond Microfluidic Devices manufactured with the replica method

Anna Karczemska; Dariusz Witkowski; V.G. Ralchenko; A. Bolshakov; Dmitry Sovyk; Jan M. Lysko; John Hassard


Materials Science and Engineering B-advanced Functional Solid-state Materials | 2011

Diamond electrophoretic microchips—Joule heating effects

Anna Karczemska; Dariusz Witkowski; V.G. Ralchenko; A. Bolshakov; Dmitry Sovyk; Jan M. Łysko; Mateusz Fijalkowski; Jerzy Bodzenta; John Hassard


Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2016

Diamond detectors with laser induced surface graphite electrodes

M. Komlenok; A. Bolshakov; V.G. Ralchenko; V. Konov; Gennaro Conte; M. Girolami; P. Oliva; S. Salvatori


Diamond and Related Materials | 2017

Nano-carbon pixels array for ionizing particles monitoring

S. Salvatori; P. Oliva; M. Pacilli; P. Allegrini; G. Conte; M. Komlenok; A. A. Khomich; A. Bolshakov; V.G. Ralchenko; V. I. Konov


Perception | 2014

The benefits of applying modern 3D technologies in computer-aided diagnostics and functional treatment of amblyopia and binocular disorders

A. Bolshakov; Maria Gracheva; Galina I. Rozhkova

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V.G. Ralchenko

Russian Academy of Sciences

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G. Conte

Sapienza University of Rome

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S. Salvatori

Università degli Studi Niccolò Cusano

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Dmitry Sovyk

Russian Academy of Sciences

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E.E. Ashkinazi

National Research Nuclear University MEPhI

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Galina I. Rozhkova

Russian Academy of Sciences

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M. Komlenok

Russian Academy of Sciences

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Maria Gracheva

Russian Academy of Sciences

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