Browsing Публикации в изданиях других стран by Title
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Ligand dynamics and temperature effects upon formation of nanocomposites based on semiconductor CdSе/ZnS quantum dots and porphyrins: ensemble and single object measurements
(2012)Dye molecules with pyridyl side substituents (porphyrins and heterocyclic perylene diimides) coordinatively attached to semiconductor CdSe/ZnS quantum dots (QDs) surface form quasi-stable “QD-Dye” nanocomposites of various geometry in the competition with capping molecules (tri-n-octyl phosphine oxide or long chain amines) exchange. This results in photoluminescence (PL) quenching ...2017-05-27 -
Light-absorption selection of nanoparticles and nanofluids containing nanoparticles for their effective heating by solar radiation
(Springer, 2017)Light-absorption selection of single nanoparticle for solar radiation requires the simultaneous fulfillment of all of the following novel conditions—maximal close (overlap) of the dependence of nanoparticle efficiency absorption factor on wavelength with the dependence solar irradiance, predominant role of nanoparticle absorption over its scattering, the use of maximal values of ...2023-05-10 -
Linguistic and acoustic resources of the computer-based system for analysis and interpretation of speech intonation
(Ульяновский ГТУ, 2017)This paper considers suprasegmental parameters such as intonation, stress and speech rhythm. Correct articulation of sounds and correct pronunciation in the target language depend on prosodic structures presented by standard intonation patterns. Linguistic and acoustic resources provide the basis for computer-aided intonation training in and outside the classroom. There is a great ...2021-06-28 -
Low-power gas sensor on nanostructured dielectric membrane
(Новые технологии, 2015)The article presents a technology for manufacture of a gas sensor with a two-layer nanostructured dielectric membrane on a silicon substrate and its characteristics. Selection of the correct mathematical model ensures a good correlation between the experimental and calculated current-voltage characteristics of the sensor and makes it possible to evaluate the effect of porosity ...2018-07-06 -
Luminescence of oxyfluoride glasses containing YB3+–RE3+ ions
(2016)The optical absorption and up-conversion luminescence of oxyfluoride glasses in the system SiO2–PbO–PbF2–CdF2 coactivated by Yb3+–RE3+ ions (where RE = Er, Tm, Ho, Dy, Pr, or Tb) are investigated. Excitation with a laser diode in the IR range (960 nm) gives intense green, blue, and red luminescence. The color characteristics of the up-conversion luminescence in the CIE 1931 system ...2017-11-22 -
Manifestation of nonplanarity effects and charge-transfer interactions in spectral and kinetic properties of triplet states of sterically strained octaethylporphyrins
(2001)Properties of the triplet states of octaethylporphyrins with the steric hindrance (free bases and Pd complexes) are studied by the methods of stationary and kinetic spectroscopy in the temperature range from 77 to 293 K. The mono-mesophenyl substitution results in a decrease in the quantum yield and shortening of the phosphorescence lifetime of Pd complexes by 250–3500 times in ...2017-05-26 -
Micro-Raman Investigation of Hydrogen Localized in Cone-Shaped Defects Formed on the Silicon Wafer Surface
(2014)The goal of this work is the micro-Raman study of molecular hydrogen localized in cone-shaped defects, which are formed on the surface of previously helium implanted and annealed Czochralski Si wafers as a result of hydrogen plasma treatment. The line at ≈ 4158 cm corresponding to molecular hydrogen is observed in the Raman spectra when the laser beam is focused both on cone-shaped ...2017-11-04 -
Microchip laser operation of Tm,Ho:KLu(WO4)2 crystal
(2014)A microchip laser is realized on the basis of a monoclinic Tm,Ho-codoped KLu(WO4)2 crystal cut for light propagation along the Ng optical indicatrix axis. This crystal cut provides positive thermal lens with extremely weak astigmatism, S/M = 4%. High sensitivity factors, M = dD/dPabs, of 24.9 and 24.1 m−1/W for the mg- and pg- tangential planes are calculated with respect to the ...2017-11-15 -
Modeling of spraying with time-dependent material feed rate
(2007)This paper presents a mathematical model for predicting the thickness of coatings deposited by means of spraying onto rotating parts with circular symmetry, for the case of time-dependent material feed rate. A procedure for calculating the material feed rate control law providing production of coatings with uniform thickness or coatings with a predefined law of thickness variation ...2018-03-10 -
Modern approach in natural language processing systems for summarization
(Томский политехнический университет, 2016)Makarych, M. V. Modern approach in natural language processing systems for summarization / M. V. Makarych // Межкультурная коммуникация: теория и практика : сборник научных трудов XVI международной научно-практической конференции, (Томск, 11-13 октября 2016 г.) / Томский политехнический университет ; ред. Ю. В. Кобенко. – Томск : Томский политехнический университет, 2016. – С. 303-306.2019-09-30 -
Modern trends in improvement of steel heating technology in continuous furnaces
(2016)The principles and approaches in the development and improvement of steel heating technology in the furnaces of rolling manufacture of various structural design, based on the systematic study of thermal physical and technological processes, including mathematical modeling, industrial experiments, development of rational temperature-thermal modes.2018-02-27 -
Multifrequency laser diagnostics of vibrational nonequilibrium gas media containing CO2 molecules
(Pleiades Publishing, 2016)The technique for multifrequency diagnostics of a vibrational nonequilibrium gas mixture that contains CO2 molecules is proposed. The technique uses data on unsaturated gains at lines of the 0001– [1000, 0200]I, II and 0002–[1001, 0201]I, II transitions obtained with the help of a tunable CO2 laser. Results of the study of the influence of accuracy of gain measurements and the ...2022-07-29 -
Multistep photoinduced electron transfer in self-organised nano-scale porphyrin triads
(2002)Well-defined structurally organised porphyrin triads of a controlled geometry andnanoscale size have been formed in liquid solutions using the combination of a covalent approach and non-covalent self-assembly. The triads contain zinc-octaethylporphyrin chemical dimer, (ZnOEP)₂Ph, with covalently linked electron acceptors (p-benzoquinone, Q or pyromellitimide, Pim), and additional ...2017-05-26 -
Negative ions of atoms and diatomic and triatomic molecules
(2016)Electron affinity is not determined by solving the Schrödinger equation, but by using a wide range of various types of interactions. In atoms, the bound between the external electron and the integrated electric dipole moment of a neutral atom mainly contributes to electron affinity. In diatomic molecules, electron affinity is defined mainly by the interaction of the external ...2020-11-03 -
NH-tautomerism and visible absorption spectra of porphyrins with nonsymmetrical substitution: oscillator model and mo calculations
(1985)On the basis or experiments Ihe oscillator model has been established for individual NH tautomers or porphyrins with asymmetrical substitution. CNDO/2 calculations explain the inversion of Q ₓ (O.O) and Q y (O.O) electronic transition intensities in NH tautomers as a consequence of the inversion of LUMO coefficients c₁ and c₂ for fixed x and y molecular oscillators.2017-05-18 -
Nonlinear thermo-optical properties of two-layered spherical system of gold nanoparticle core and water vapor shell during initial stage of shell expansion
(2011)Nonlinear thermo-optical properties of two-layered spherical system of gold nanoparticle core and water vapor shell, created under laser heating of nanoparticle in water, were theoretically investigated. Vapor shell expansion leads to decreasing up to one to two orders of magnitude in comparison with initial values of scattering and extinction of the radiation with wavelengths ...2018-03-06 -
On the bonding strength of Fe-based self-fluxing alloy coating deposited by different methods on the steel substrate
(University of Zielona Góra, 2018)In the present paper, the bonding strength of Fe-based self-fluxing alloy coating deposited by plasma spraying, gluing and laser remelting and alloying on the steel substrate have been investigated. When flame melting, a globular structure is formed. Against the background of the solid solution carbide-boride phases are clearly distinguishable, between which the Fe-Fe2B and Fe-FeB ...2018-09-13 -
On the formation features and some material properties of the coating formed by laser cladding of a nicrbsi self-fluxing alloy
(Springer, 2018)In the present paper, the influence of laser cladding conditions on the powder flow conditions as well as the microstructure, phases, and microhardness of a Ni-based self-fluxing alloy coating is studied. The formation regularities of a coating microstructure with different cladding conditions as well as patterns of element distribution over the coating depth and in the transient ...2023-10-05 -
Operation of a Spark-Ignition Engine on Mixtures of Petrol and N-Butanol
(2017)The Article analyses the use of n-butanol (biobutanol) in mixtures with petrol in spark-ignition (SI) internal combustion engines (ICE). Analysis of the scientific literature allowed determining that n-butanol content had a different effect on the same engine parameters in different tests, thus a decision was made to conduct additional research, where, having assembled the necessary ...2018-03-10 -
Opportunities for bioenergy in the Baltic Sea Region
(2017)Security of energy supply, promotion of the bio-economy, nutrient recycling, and innovation are prioritized policy areas in the EU Strategy for the Baltic Sea Region (EUBSR). The Baltic Sea Region (BSR) has a great bioenergy potential worth exploring in this context. This paper explores the state-of-art of bioenergy systems and synergies with eco-systems services in the BSR region ...2021-07-19