29 research outputs found
Acoustical Physics, V. 50, I. 06
No full textAcoustical Physics -- November 2004
Volume 50, Issue 6, pp. 623-750
Nonlinear Ultrasonic Phase-Conjugate Beams and Their Application in Ultrasonic Imaging
A. P. Brysev, L. M. Krutyansky, P. Pernod, and V. L. Preobrazhensky
pp. 623-640 Full Text: PDF (460 kB)
Testing Underwater Bottom-Moored Antenna Arrays in the Sea and in a Man-Made Lake
V. I. Bardyshev
pp. 641-646 Full Text: PDF (88 kB)
A New Solution to the Problem of an Acoustically Transparent Body
Yu. I. Bobrovnitskii
pp. 647-650 Full Text: PDF (53 kB)
Scattering of High-Frequency Waves by Surfaces in Continuous Media with Allowance for Rereflections
N. V. Boev
pp. 651-656 Full Text: PDF (81 kB)
Characteristics of Sound Signals on a Quasi-Stationary Track between the Josephine and Ampere Seamounts
O. P. Galkin and S. D. Pankova
pp. 657-663 Full Text: PDF (153 kB)
Measurement of the Elastic Moduli of Dense Layers of Oriented Carbon Nanotubes by a Scanning Force Microscope
K. V. Gogolinskii, Z. Ya. Kosakovskaya, A. S. Useinov, and I. A. Chaban
pp. 664-669 Full Text: PDF (355 kB)
Numerical Analysis of the Properties of Slit Electroacoustic Waves
M. Yu. Dvoesherstov, V. I. Cherednik, S. G. Petrov, and A. P. Chirimanov
pp. 670-676 Full Text: PDF (93 kB)
Measured and Calculated Vertical Structure of a Sound Field in the Ocean
I. N. Didenkulov, V. A. Zverev, V. P. Ivanov, and G. K. Ivanova
pp. 677-684 Full Text: PDF (94 kB)
The Principle of Acoustic Time Reversal and Holography
V. A. Zverev
pp. 685-693 Full Text: PDF (154 kB)
Dispersion of Waves in a Plane Acoustic Layer with Flexible Elastic Walls
Yu. D. Kaplunov, I. V. Kirillova, and Yu. A. Postnova
pp. 694-698 Full Text: PDF (65 kB)
Parameters of Microparticles Responsible for the Monopole Sound Scattering in a Liquid
Yu. A. Kobelev
pp. 699-703 Full Text: PDF (67 kB)
Effects of Localization of the Areas of Sound Scattering by Surface Wind Waves
A. V. Lebedev and B. M. Salin
pp. 704-716 Full Text: PDF (292 kB)
The Total Acoustic Impedance of a Prolate Spheroid Performing Transverse Oscillatory Movements
A. B. Maizel'
pp. 717-720 Full Text: PDF (54 kB)
Nonlinear Wave Interactions in Porous Media Filled with a Quantum Fluid
N. I. Pushkina
pp. 721-724 Full Text: PDF (58 kB)
Nonlinear Processes in Media with an Acoustic Hysteresis and the Problems of Dynamic Interaction between Piles and Earth Foundation
O. V. Rudenko and V. A. Robsman
pp. 725-731 Full Text: PDF (90 kB)
Localization of a Transverse Elastic Wave in a Semibounded Acoustic Superlattice of Ferrimagnetic and Superconducting Layers: 2. Effect of a Nonmagnetic Coating
O. S. Tarasenko, S. V. Tarasenko, and V. M. Yurchenko
pp. 732-741 Full Text: PDF (126 kB)
Circumferential Normal Modes in an Empty Elastic Cylinder
V. V. Tyutekin
pp. 742-750 Full Text: PDF (136 kB)Archived web conten
Jurysdykcja i prawo właściwe w sprawie dotyczącej uchwały wspólnoty mieszkaniowej zobowiązującej jej członków do zapłaty kosztów utrzymania części wspólnych
Get PDFThe commentary relates to the judgment of the Court of Justice of the European Union of 8 May 2019 in case C 25/18 Brian Andrew Kerr v. Pavel Postnov and Natalia Postnova. In this judgement, the Court ruled that the dispute concerning the payment obligation arising from a resolution taken by the general assembly of property owners in a building that does not have legal personality and is specifically regulated by law in order to exercise certain rights –if the resolution was taken by a majority of members but binds all members – must be recognised as falling within the concept of “matters related to a contract” within the meaning of Article 7(1)(a) of Regulation (EU) No 1215/2012 of the European Parliament and of the Council of 12 December 2012 on jurisdiction and the recognition and enforcement of judgments in civil and commercial matters. Moreover, the Court found that the dispute concerning a payment obligation resulting from a resolution of the general assembly of property owners in a residential building, relating to the costs of maintaining the common areas of that property, must be regarded as relating to a contract for the provision of services within the meaning of Article 4 (1) (b) of Regulation (EC) No 593/2008 of the European Parliament and of the Council of 17 June 2008 on the law applicable to contractual obligations (Rome I). In the commentary, the Author presents a critical approach to the above judgement of the Court in both aspects.Glosa dotyczy wyroku Trybunału Sprawiedliwości z dnia 8 maja 2019 r. w sprawie C-25/18 Brian Andrew Kerr przeciwko Pavlowi Postnovowi i Natalii Postnovej. W wyroku tym Trybunał Sprawiedliwości stwierdził, że w sytuacji gdy zobowiązanie do zapłaty wynika z uchwały zgromadzenia ogólnego współwłaścicieli budynku wielomieszkaniowego nieposiadającego osobowości prawnej i ustanowionego specjalnie na mocy ustawy w celu wykonywania niektórych praw, przyjętej przez większość członków wspólnoty mieszkaniowej, lecz wiążącej wszystkich jej członków, spór dotyczący owego zobowiązania do zapłaty należy uznać za należący do zakresu pojęcia „spraw dotyczących umowy” w rozumieniu art. 7 pkt 1 lit. a rozporządzenia Parlamentu Europejskiego i Rady (UE) nr 1215/2012 z dnia 12 grudnia 2012 r. w sprawie jurysdykcji i uznawania orzeczeń sądowych oraz ich wykonywania w sprawach cywilnych i handlowych. Ponadto, TS stwierdził, że spór dotyczący wynikającego z uchwały ogólnego zgromadzenia współwłaścicieli budynku mieszkalnego zobowiązania do zapłaty kosztów utrzymania części wspólnych tego budynku, należy uznać za spór dotyczący umowy o świadczenie usług w rozumieniu art. 4 ust. 1 lit. b rozporządzenia Parlamentu Europejskiego i Rady (WE) nr 593/2008 z dnia 17 czerwca 2008 r. w sprawie prawa właściwego dla zobowiązań umownych (Rzym I). Autor poddaje krytycznej analizie powyższe rozstrzygnięcie w obu aspektach
ЭПИТАКСИАЛЬНЫЕ ПЛЕНКИ СЕЛЕНИДА ЦИНКА НА ПОРИСТОМ КРЕМНИИ
Get PDFZnSe epitaxial films are grown on (111)- and (100)-oriented Si substrates with a porous buffer layer by the thermal evaporation of ZnSe compound. The crystal structure of the deposited films was controlled by X-ray diffraction. The morphology of the films was studied by high-resolution scanning electron microscopy. It was demonstrated the porous buffer layer provides improving the quality of the films compared with films deposited on the monolithic silicon.Эпитаксиальные пленки ZnSe выращены путем термического испарения соединения ZnSe на подложках Si ориентации (111) и (100) с буферным пористым слоем. Кристаллическая структура осаждаемых пленок контролировалась методом рентгеновской дифрактометрии. Морфология пленок изучалась методом растровой электронной микроскопии высокого разрешения. Установлено, что использование пористого буферного слоя позволяет повысить качество пленок по сравнению с пленками, осажденными на монолитный кремний
Soluble gC1qR is an autocrine signal that induces B1R expression on endothelial cells
Get PDFBradykinin (BK) is one of the most potent vasodilator agonists known and belongs to the kinin family of proinflammatory peptides. BK induces its activity via two G protein-coupled receptors: BK receptor 1 (B1R) and BK receptor 2. Although BK receptor 2 is constitutively expressed on endothelial cells (ECs), B1R is induced by IL-1β. The C1q receptor, receptor for the globular heads of C1q (gC1qR), which plays a role in BK generation, is expressed on activated ECs and is also secreted as soluble gC1qR (sgC1qR). Because sgC1qR can bind to ECs, we hypothesized that it may also serve as an autocrine/paracrine signal for the induction of B1R expression. In this study, we show that gC1qR binds to ECs via a highly conserved domain consisting of residues 174-180, as assessed by solid-phase binding assay and deconvolution fluorescence microscopy. Incubation of ECs (24 h, 37°C) with sgC1qR resulted in enhancement of B1R expression, whereas incubation with gC1qR lacking aa 174-180 and 154-162 had a diminished effect. Binding of sgC1qR to ECs was through surface-bound fibrinogen and was inhibited by anti-fibrinogen. In summary, our data suggest that, at sites of inflammation, sgC1qR can enhance vascular permeability by upregulation of B1R expression through de novo synthesis, as well as rapid translocation of preformed B1R
EPITAXIAL FILMS OF ZINC SELENIDE ON POROUS SILICON
No full textZnSe epitaxial films are grown on (111)- and (100)-oriented Si substrates with a porous buffer layer by the thermal evaporation of ZnSe compound. The crystal structure of the deposited films was controlled by X-ray diffraction. The morphology of the films was studied by high-resolution scanning electron microscopy. It was demonstrated the porous buffer layer provides improving the quality of the films compared with films deposited on the monolithic silicon
Nanostructural organization of naturally occurring composites - part II: silica-chitin-based biocomposites
No full textInvestigations of the micro- and nanostructures and chemical composition of the sponge skeletons as examples for natural structural biocomposites are of fundamental scientific relevance. Recently, we show that some demosponges (Verongula gigantea, Aplysina sp.) and glass sponges (Farrea occa, Euplectella aspergillum) possess chitin as a component of their skeletons. The main practical approach we used for chitin isolation was based on alkali treatment of corresponding external layers of spicules sponge material with the aim of obtaining alkali-resistant compounds for detailed analysis. Here, we present a detailed study of the structural and physicochemical properties of spicules of the glass sponge Rossella fibulata. The structural similarity of chitin derived from this sponge to invertebrate alpha chitin has been confirmed by us unambiguously using physicochemical and biochemical methods. This is the first report of a silica-chitin composite biomaterial found in Rossella species. Finally, the present work includes a discussion related to strategies for the practical application of silica-chitin-based composites as biomaterials
Three-dimensional edge waves in plates
No full textThis paper describes the propagation of three-dimensional symmetric waves localized near the traction-free edge of a semi-infinite elastic plate with either traction-free or fixed faces. For both types of boundary conditions, we present a variational proof of the existence of the low-order edge waves. In addition, for a plate with traction-free faces and zero Poisson ratio, the fundamental edge wave is described by a simple explicit formula, and the first-order edge wave is proved to exist. Qualitative variational predictions are compared with numerical results, which are obtained using expansions in three-dimensional Rayleigh–Lamb and shear modes. It is also demonstrated numerically that for any non-zero Poisson ratio in a plate with traction-free faces, the eigenfrequencies related to the first-order wave are complex valued
Production of Thin Pb<sub>x</sub>Sn<sub>1–x</sub>Te Films by “Hot Wall” Method for Creating IR-Photodetectors
No full textAlloys of lead and tin telluride (PbxSn1–xTe) are materials with good thermoelectric properties, as well as semiconductors that can be used as long-wave infrared detectors. Polycrystalline telluride of PbxSn1–xTe (0.05 £ x £ 0.80) alloys has been synthesized by direct fusion technique. Thin films of these materials have been obtained by the hot wall method depositing Сorning 7059 on glass substrates at Tsub = (200–350) oC and vacuum of about 10–5 Torr. The microstructure of the films has been investigated by XRD, SEM and EDX methods. The X-ray spectra of thin films have been in satisfactorily agreement with the spectra of the powder target and indicated the absence of binary phases. The films have shown a natural cubic crystalline structure. While increasing the lead content, the unit cell parameter of the crystal also increases. The established linear relationship between the unit cell parameter and the elemental composition corresponds to Vegard's law. The SEM analysis has shown that the films are polycrystalline, have a columnar structure, are tightly packed and have good mechanical adhesion. The grain size depends on the chemical composition and temperature of the substrate. The electrical measurements have shown that the grown films are non-degenerate semiconductors of p-type conductivity. The conductivity of the films was in the range of σ = (3 × 101)–(1 × 104) Ω–1×cm–1. An increase of lead concentration leads to a decrease in electrical conductivity. Hall mobility in the grown thin films increases in the range of changes in the lead content from ~10 to ~23 at. %, and decreases with a further increase to ~33 at. %. At the same time, the strongest dependence of the decrease in mobility on an increase in temperature increase is observed for films with a high lead content and is explained by the predominant scattering of charge carriers by vibrations of the crystal lattice. For a sample with an average lead concentration, an alternative effect of two scattering mechanisms is observed in the temperature dependence of the mobility: by impurity ions and by phonons
Review on the development of truly portable and in-situ capillary electrophoresis systems
No full textCapillary electrophoresis (CE) is a technique which uses an electric field to separate a mixed sample into its constituents. Portable CE systems enable this powerful analysis technique to be used in the field. Many of the challenges for portable systems are similar to those of autonomous in-situ analysis and therefore portable systems may be considered a stepping stone towards autonomous in-situ analysis. CE is widely used for biological and chemical analysis and example applications include: water quality analysis; drug development and quality control; proteomics and DNA analysis; counter-terrorism (explosive material identification) and corrosion monitoring. The technique is often limited to laboratory use, since it requires large electric fields, sensitive detection systems and fluidic control systems. All of these place restrictions in terms of: size, weight, cost, choice of operating solutions, choice of fabrication materials, electrical power and lifetime. In this review we bring together and critique the work by researchers addressing these issues. We emphasize the importance of a holistic approach for portable and in-situ CE systems and discuss all the aspects of the design. We identify gaps in the literature which require attention for the realization of both truly portable and in-situ CE systems
