Filters








307 Hits in 2.0 sec

VItaly DuDNIk GrIGory DuDNIk VIktor karabut IlIa SamSoNoV VlaDImIr GrIboVSky* 5112016 72 79 10.5604/05096669.1202203 http://9807.indexcopernicus.com/abstracted.php?level=5&ICID=1202203

Wieńczysław Stalewski
2016 Transactions of the Institute of Aviation  
Process of aerodynamic design and optimisation of main rotors intended for modern gyroplanes has been presented. First stage of the process was focused on development of family of airfoils, designed and optimised especially towards gyroplane applications. In next stage, based on developed family of airfoils, two alternative gyroplane main rotors were designed. the main optimisation criterion was to minimise aerodynamic drag of the rotor, for assumed flight velocity and lift force generated by
more » ... e rotor, balancing the weight of the gyroplane. the paper discusses the applied methodology of design and optimisation as well as presents geometric and aerodynamics properties of designed main rotors. keywords: gyroplane, main rotor, rotor blade, airfoil, aerodynamic design and optimisation, Virtual Blade Model.
doi:10.5604/05096669.1202204 fatcat:ghffbmzj7rd3fdjwtebq7lleoq

Elementary parabolic twist [article]

Vladimir Lyakhovsky, Maxim Samsonov
2001 arXiv   pre-print
The twist deformations for simple Lie algebras U(g) whose twisting elements F are known explicitly are usually defined on the carrier subspace injected in the Borel subalgebra B^+(g). We solve the problem of creating the parabolic twist F_P whose carrier algebra P not only covers B^+(g) but also intersects nontrivially with B^-(g). This algebra P is the parabplic subalgebra in sl(3) and has the structure of the algebra of two-dimensional motions. The parabolic twist is explicitly constructed as
more » ... a composition of the well known extended jordanian twist F_EJ and the new factor F_D. The latter can be considered as a special version of the jordanian twist. The twisted costructure is found for U(P) and the corresponding universal R-matrix is presented.
arXiv:math/0107034v1 fatcat:4twiu5xnlzdfdhmu3kxn2witi4

Thermodynamic model of crystallization and melting of small particles

Vladimir Samsonov, Oleg Malkov
2004 Open Physics  
AbstractThe size dependence of the nanocrystal melting temperature has been investigated based on a nonequilibrium thermodynamics approach. An expression has been derived for the melting temperature that, contrary to the classical Tomson formula, takes into account the metastable character of the crystal nucleus-melt shell equilibrium. Quantitative estimations have been carried out for small spherical particles of aluminum, tin, and lead.
doi:10.2478/bf02476274 fatcat:dkfmekjrpzccvfynpmcrdrfwqq

In memory of Vladimir Mikhailovich Lobashev

Yurii G Abov, E V Geraskin, Semen S Gershtein, Rashid M Djilkibaev, V F Ezhov, Leonid V Kravchuk, Viktor A Matveev, Valerii A Rubakov, Vladimir M Samsonov, Anatoly P Serebrov, Aleksandr N Skrinsky, Valery V Fedorov
2011 Physics Uspekhi  
doi:10.3367/ufne.0181.201112p.1371 fatcat:ptfch4w4ybhvlkcodyyrfni5bi

A thermodynamic approach to mechanical stability of nanosized particles

Vladimir Samsonov, Nikolay Sdobnyakov
2003 Open Physics  
According to Hall et al. and Samsonov et al., icosahedral (Ih) and decahedral (Dh) silver nanoclusters exist in 2 nm-size range [17, 18] .  ... 
doi:10.2478/bf02476301 fatcat:crmigbr7azbw5na33za7wphi7e

In memory of Vladimir Mikhailovich Lobashev
Памяти Владимира Михайловича Лобашёва

Yurii G. Abov, E.V. Geraskin, Semen S. Gershtein, Rashid M. Djilkibaev, V.F. Ezhov, L.V. Kravchuk, Viktor A. Matveev, Valerii A. Rubakov, Vladimir M. Samsonov, Anatolii P. Serebrov, A.N. Skrinsky, V.V. Fedorov
2011 Uspehi fiziceskih nauk  
doi:10.3367/ufnr.0181.201112p.1371 fatcat:mmnb2xrmhnhhrjymyy2ujdstu4

Calculation of aerodynamic characteristics of adjacent buildings
Расчёт аэродинамических характеристик смежных зданий

Vladimir Samsonov
2020 Construction and Architecture  
The article describes the basic formulas for determination of the aerodynamic characteristics of the industrial buildings and their complexes: the size of the circulation zones, the aerodynamic coefficients and the velocity profiles of the wind.
doi:10.29039/2308-0191-2020-8-1-67-81 fatcat:5clwfdjg6bhidepjuzeit2s3ve

Outlooks for development of silicon nanoparticle memory cells

Igor V. Talyzin, Vladimir M. Samsonov
2019 Modern Electronic Materials  
Phase change memory is based on changes in the optical, electrical or other properties of materials during phase transitions, e.g. an amorphous to crystalline transition. Currently existing and potential applications of this memory are primarily based on multicomponent alloys of metals and semiconductors. However single-component nanoparticles including Si ones are also of interest as promising nanosized memory cells. The potential for developing this type of memory cells is confirmed by the
more » ... t that the optical absorption index of bulk amorphous silicon is of the same order of magnitude as that of crystalline silicon. Certainly this phenomenon can hardly be implemented with a single nanoparticle the size of which is within light wavelength. Using molecular dynamics and the Stillinger-Weber potential we have studied the regularities of melting and the conditions of crystallization of silicon nanoparticles containing within 105 atoms. We have shown that cooling of nanosized silicon drops at a 0.2 TK/s rate or higher rates causes their amorphous transition whereas single-component nanosized metallic drops crystallize in molecular dynamics experiments even at a 1 TK/s rate. Further heating of amorphous silicon nanoparticles containing above 5 ∙ 104 atoms causes their crystallization in a specific temperature range from 1300 to 1400 K. We have concluded that there is a possibility of developing phase change memory cells on the basis of the above phase transitions. An amorphous transition of a nanoparticle can be achieved by its melting and further cooling to room temperature at a 0.2 TK/s rate whereas a crystalline transition, by its heating to 1300–1400 K at a 0.2 TK/s rate followed by cooling. Results of molecular dynamics experiments suggest there is a minimum silicon nanoparticle size for which the development of phase change memory cells becomes theoretically impossible at a given temperature change rate. For a 0.2 TK/s temperature change rate this minimum size is 12.4 nm (number of atoms approx. 5 ∙ 104).
doi:10.3897/j.moem.5.4.51788 fatcat:7ejxtna7efcwnlgxykaxkkflr4

Reinforcement Learning for Short-Term Production Scheduling with Sequence-Dependent Setup Waste

Vladimir Samsonov, Mohamed Behery, Gerhard Lakemeyer
2020 ERCIM News  
doi:10.18154/rwth-2020-11165 fatcat:x3xvomljjrd5xhplvj62i36hwi

Ventilation currents in the turbulent environment of industrial premises
Вентиляционные течения в турбулизированной среде производственных помещений

Vladimir Samsonov
2022 Construction and Architecture  
Список литературы Vladimir Samsonov, candidate of technical Sciences, associate Professor .  ... 
doi:10.29039/2308-0191-2021-10-1-26-30 fatcat:6pq3kh4gdjhldpialirbt5ky5a

Serum Neopterin - Possible Marker to Predict Progression of Dilated Cardiomyopathy

Mikhail Samsonov, Eugeney Nassonov, Valerei Masenko, Vladimir Naumov, Vjacheslav Mareev, Yuriy Belenkov
1990 Pteridines  
Fifteen patients with clinical diagnosis of dilated cardiomyopathy (DCMP) were followed for 3 to 34 months. Serum neopterin and ~rmicroglobulin concentrations were measured by radioimmunoassay. According to the changes of neopterin and ~Tmicroglobulin levels in the follow-up study patients were divided into three groups. The course of disease in group 1 (5 patients with constant normal neopterin level « 9 nmol /L) during the study) was stable without deterioration and increase of New York Heart
more » ... Association (NYHA) Class. In group 2 (2 patients with raised neopterin in levels at the beginning of the study) some clinical improvement was associated with normalization of neopterin concentration. In group 3 (8 patients) the relation between the disease progression and increasing neopterin level was observed. The data of this study clearly indicated that neopterin measurements had a predictive value in patients with clinical diagnosis of DCMP.
doi:10.1515/pteridines.1990.2.3.165 fatcat:b5uzqj5oybe2jo3vuz6dzj7jxm

Project of very light helicopter "Shmel"

VItaly Dudnik, Grigory Dudnik, Viktor Karabut, Ilia Samsonov, Vladimir Gribovsky
2016 Transactions of the Institute of Aviation  
VItaly DuDNIk, GrIGory DuDNIk, VIktor karabut, IlIa SamSoNoV, VlaDImIr GrIboVSky two-seats cabin with large area of glass is similar to helicopter cockpit ak1-3, but has smaller dimensions [1].  ...  VItaly DuDNIk, GrIGory DuDNIk, VIktor karabut, IlIa SamSoNoV, VlaDImIr GrIboVSky ProJECt oF VEry lIGHt HElICoPtEr "SHmEl" Certain general parameters allow to determine the shape of the helicopter.  ... 
doi:10.5604/05096669.1202203 fatcat:5y6sabemqbhzrlc6krd2hriysa

Security proof for continuous-variable quantum key distribution with trusted hardware noise against general attacks [article]

Roman Goncharov, Alexei D. Kiselev, Eduard Samsonov, Vladimir Egorov
2022 arXiv   pre-print
In this paper, using the full security framework for continuous variable quantum key distribution (CV-QKD), we provide a composable security proof for the CV-QKD system in a realistic implementation. We take into account equipment losses and contributions from various components of excess noise and evaluate performance against collective and coherent attacks assuming trusted hardware noise. The calculation showed that the system remains operable at channel losses up to 10.2 dB in the presence
more » ... collective attacks and up to 7.5 dB in the presence of coherent ones.
arXiv:2205.05299v1 fatcat:xo7gi7chdrh2fo2moa63kkyrv4

Evaluation of immune and chemical precipitation methods for plasma exosome isolation

Tatiana Shtam, Vladimir Evtushenko, Roman Samsonov, Yana Zabrodskaya, Roman Kamyshinsky, Lidia Zabegina, Nikolay Verlov, Vladimir Burdakov, Luiza Garaeva, Maria Slyusarenko, Nadezhda Nikiforova, Andrey Konevega (+2 others)
2020 PLoS ONE  
Author Contributions Conceptualization: Vladimir Evtushenko, Anastasia Malek.  ... 
doi:10.1371/journal.pone.0242732 pmid:33232386 fatcat:mhyq4eshyrddrmrawbfs7glkj4

On the size dependence of surface tension in the temperature range from melting point to critical point

Nickolay Sdobnyakov, Vladimir Samsonov
2005 Open Physics  
AbstractThe problem of size dependence of surface tension was investigated in view of a more general problem of the applicability of Gibbs' thermodynamics to nanosized objects. For the first time, the effective surface tension (coinciding with the specific excess free energy for an equimolecular dividing surface) was calculated within a wide temperature range, from the melting temperature to the critical point, using the thermodynamic perturbation theory. Calculations were carried out for
more » ... d-Jones and metallic nanosized droplets. It was found that the effective surface tension decreases both, with temperature and particle size.
doi:10.2478/bf02475591 fatcat:4ep7tnkxuzb7ldjp6qkwchxtqe
« Previous Showing results 1 — 15 out of 307 results