A5058879665- Magnetic confinement fusion research
- Ionosphere and magnetosphere dynamics
- Tribology and Wear Analysis
- Lubricants and Their Additives
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Solar and Space Plasma Dynamics
- Medical Imaging Techniques and Applications
- Advanced Theoretical and Applied Studies in Material Sciences and Geometry
- Plasma Diagnostics and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Material Properties and Applications
- Catalytic Processes in Materials Science
- Polymer Science and Applications
- Particle Detector Development and Performance
- Hydraulic and Pneumatic Systems
- Magnetic Field Sensors Techniques
- Engineering Applied Research
- Catalysts for Methane Reforming
- Engineering Technology and Methodologies
- Mechanical Systems and Engineering
- Hydrogen Storage and Materials
- Advanced MRI Techniques and Applications
Moscow State University
2025
Lomonosov Moscow State University
2025
Ivanovo State Power University
2015-2024
Platov South-Russian State Polytechnic University
2023-2024
Ivanovo State University
2019-2023
Vyatka State University
2018-2021
Ivanovo State Medical Academy
2021
Ministry of Emergency Situations
2009-2011
Johns Hopkins University
2006-2008
Columbia University
1999-2005
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> With continuing improvements in spatial resolution of positron emission tomography (PET) scanners, small patient movements during PET imaging become a significant source degradation. This work develops and investigates comprehensive formalism for accurate motion-compensated reconstruction which at the same time is very feasible context high-resolution PET. In particular, this paper proposes an...
The surface binding energy of atoms in solids is an important parameter for sputtering under ion beam irradiation. In case multicomponent materials sputtering, such as alloys, the ratio alloy components’ energies determines preferential process. this paper NixPdy alloys with various stoichiometry calculated using molecular dynamics simulation. dependency on concentrations shown. temperature dependencies and second atomic layer are also calculated.
External kink instabilities are suppressed in a tokamak experiment by either (1) energizing distributed array of independently controlled active feedback coils mounted outside segmented resistive wall or (2) inserting second having much higher electrical conductivity. When the off and highly conducting is withdrawn, excited plasma current gradients grow at rate comparable to magnetic diffusion wall.
The plasma response to external resonant magnetic perturbations is measured as a function of stability the resistive wall mode (RWM). are produced with flexible, high-speed waveform generator that preprogrammed drive an in-vessel array 30 independent control coils and produce m/n=3/1 helical field. Both quasi-static “phase-flip” applied time-evolving discharges in order observe dynamical RWM stability. evolving estimated using equilibrium reconstructions ideal computations, facilitating...
Fundamental theory, experimental observations and modelling of resistive wall mode (RWM) dynamics active feedback control are reported. In the RWM, plasma responds to interacts with external current-carrying conductors. Although this response is complex, it still possible construct simple but accurate models for kink by combining separate determinations currents, using VALEN code, plasma's inductance matrix, an magnetohydrodynamics code such as DCON. These computations have been performed...
Background and aim In high-resolution emission tomography imaging, even small patient movements can considerably degrade image quality. The of this work was to develop a general approach motion-corrected reconstruction motion-contaminated data in the case rigid motion (particularly brain imaging) which would be applicable any PET scanner field, without specialized data-acquisition requirements. Methods Assuming ability externally track subject during scanning (e.g., using Polaris camera), we...
Rotating external kink instabilities have been suppressed as well excited in a tokamak using active magnetic coils that directly couple to the plasma through gaps passive stabilizing conducting shells surround plasma. The instability has complex growth rate, approximately (3+i2π5)×103s−1, and is near ideal wall stability limit when discharges are prepared with rapid current ramp adjusted an edge safety factor 3. control driven by digital mode feedback system uses multiple field-programmable...
Experiments provide simultaneous, local measurements of the pressure and ion velocity perturbations from rotating m/n=2/1 magnetic islands using Mach probes in a tokamak. Measurements were made both inside around islands. Pressure followed island motion for naturally actively controlled The toroidal profile was sharply peaked near center 2/1 island, magnitude this peak ∼30% velocity. Active rotation control experiments also successfully changed fluid acceleration ∼20% that experienced by...
In high resolution emission tomography imaging, even small patient movements can considerably degrade image quality. This work investigates an approach to motion compensated reconstruction of motion-contaminated data, thus applicable any scanner in the field (e.g. without list-mode acquisition capability), assuming externally-tracked information; it involves incorporation measured information into system matrix EM algorithm. Furthermore, is shown that effect motion-contamination attenuation...
3 Ивановский государственный университет, НИИ наноматериалов, ул.Ермака, д. 39, 153025 Иваново, Россия В работе представлены результаты расчетов модельной задачи в рамках континуальной модели методом конечных элементов, касающихся деформации на изгиб одностенных и многостенных углеродных нанотрубок (УНТ) при вариации их длины толщины.Впервые установлено, что полученная нелинейная зависимость жесткости от диаметра УНТ нанометровой шкале соответствует современным теоретическим представлениям...
Rotating magnetic islands produce fluctuations on a variety of diagnostics in fusion energy plasmas. The analysis these requires the calculation amplitude, phase, and frequency oscillations. These three spectral quantities generally evolve time, necessitating nonstationary signal techniques. Hilbert transform offers an efficient accurate method calculating from one diagnostic signal. This feature allows to determine success active rotation control islands, calculate profile measurements...
Observations of a performance limiting feedback phase instability in the HBT-EP tokamak are reported. The consists rapid growth difference between an m/n = 2/1 tearing mode and external resonant magnetic perturbation. angular dynamics during test discharges show good agreement with theoretical estimates timescale. limits by decreasing loop's accuracy as gain increases.
A high-speed, noninvasive velocity diagnostic has been developed for measuring plasma rotation. The Doppler shift is determined by employing two detectors that view line emission from the identical volume of plasma. Each detector views through an interference filter having a passband varies linearly with wavelength. One whose negative slope and second one positive slope. Because each channel same plasma, ratio amplitudes not sensitive to variations in emission. With suitable knowledge...
The tribological and rheological characteristics of three industrially produced greases a model lubricant (medical vaseline) doped with new carbon nanoflakes additives (few layer graphite nanofragments, LGF their nitrogen-containing analog, N-LGF) have been studied. It is shown that the modification structure heteroatoms can significantly reduce friction coefficient under certain loads. results obtained in this work demonstrate prospects for further study use modified nanomaterials.
The analysis of the characteristics activated carbon obtained by thermochemical activation hydrolytic lignin with sodium hydroxide is presented. design measuring cell supercapacitor described, as well a method for capacitance and internal resistance supercapacitor. specific electrode based on under study, neutral aqueous electrolytes 1 M sulfate 4 chloride, were determined.
The paper views mathematical and numerical models of wear elastomeric materials developed by the authors in dead rolling with sliding movement. When developing a model, classical ideas about kinematic characteristics massive tire along abrasive surface disc were used. To describe intensity wear, model uses concepts formulated D. Archard modified relation to studied objects - rubber-based resin elastics SRI-3 SRS-30–ARKM-15 rubbers reinforced carbon nanostructures. implementation is performed...