Normal range of liver stiffness measurement in healthy people
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The ulrasonographic semiotics of diffuse liver disease: Verification using the point shear-wave elastography
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On diagnostic relationships between acoustic and entropy modes
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Numerical simulation of wave processes in elastic-acoustic problems using discontinuous Galerkin method on triangle unstructured meshes
... Galerkin methods: algorithms, analysis, and applications. Texts in Applied Mathematics. Springer, 2008. Vol. 54.
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Numerical solution of elastic-acoustic problems with the help of grid-characteristic method
... problems are simulated with the help of grid-characteristic method, in particular, for the offshore seismic prospecting. We consider systems of water-soil-hydrocarbon-bearing layer and ice-water-soil-hydrocarbon-bearing layer
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Joint modeling of elastic and acoustic waves in the Arctic
... presented. Results of numerical modeling of the explosive impact on the iceberg and earthquake impact on the oil storage are considered as well. The complete system of equations describing the state elastic body and a system of equations describing the acoustic field are solved using grid-characteristic method, the contact condition between the liquid and the solid is used on the border
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Liver elastography techniques and the problems of Russian terminology
... cross-validate multimodality shear wave elastography techniques // IEEE International Ultrasonics Symposium (IUS). Dresden, 2012. Р. 1858—1861. doi: 10.1109/ULTSYM.2012.0466.
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...
On asymptotic expression for velocity field of atmosphere gas perturbed by 1D acoustic wave
The problem of 1D acoustic wave initiation by a rise of water masses is formulated as a boundary problem at half space . The atmosphere is modeled as a multi-layer gas with an exponential structure of density in each layer. The boundary conditions at determine the direction ...
Physical foundations of liver elastography
....medical.canon/wp-content/
uploads/sites/17/2017/02/A-comparison-of-one-shot-and-continuous-modes-for- Shear-Wave-elastography-on-the-Toshiba-Aplio-500.pdf (дата обращения: 04.08.2018).
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Bercoff J., Tanter M., Fink M. Supersonic Shear Imaging: a new technique for soft tissue elasticity mapping // IEEE Trans Ultrason Ferroelectr ...
Musical ekphrasis and musical code in N. Kononov’s novels
The article studies the representation of acoustic imagery in N. Kononov’s novels. The research focuses on musical ekphrasis and musical code in the context of all the acoustic nominations found in the texts. In the system of sensory codes, under the concept of "musical", the author ...
ARFI-elastometry of the liver in healthy volunteers: standardization of methods
The traditional method of determining the propagation of acoustic waves during ARFI-elastometry of the liver as well as the existing norms are rather controversial. The article aims at standardization of techniques and the development of protocols for the AFRI elastometry of the liver. The study identifies ...
The applying of digital interferometric methods to nano-displacement registration
... limiting sensitivity of digital holographic methods of measurements of a surface of movings is lead}. Influence of a degree of digitization of hardware on limiting the sensitivity of digital holographic measurements is analysed. Parameters of surface — acoustic waves with amplitudes of fluctuations less than 10 nanometers are experimentally investigated.
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Imaging of Acoustic Waves ...
Intonological aspect of the vocal form of the language (on the example of the Russian choir)
... cognitive systems, namely music and language, function via intonological models (the ones characteristic of both music and speech) of perception. Although the vocal music melody of a national language is not fully identical to speech intonation patterns acoustically, it still includes a number of intonation features that are perceived by the listener as characteristic of his or her native language. Opera is a form of language music realization, which makes it a subject of psycholinguistic studies. ...
Regional innovation security as a coherence of multi-cyclic self-organizing: experience in building an ideal model
... sphere, respectively, to other subsystems of regional reproduction. Thus, regular crises are explained by a periodic violation of the coherence between subcycles of shorter length (taking into account their phase shift), which is analogous to the acoustic beat effect in the propagation of wave phenomena in natural environments. The same phenomenon becomes a factor of vulnerability of the regional system in relation to irregularly occurring and turbulently developing impulses of the external ...
Numerical study of the problem of ultrasound tomography
The work is devoted to the problem of determining small sound speed fluctuations in glandular tissue for specific breast model (2D). Our approach is based on visualization of acoustical medium (inclusions and unknown inner boundary between fat and glandular tissues) and determination of sound speeds in inclusions using kinematic argument. The results of numerical simulation (2D) of the problem are presented in the paper....
Liver shear wave elastography: the problem of accuracy and reproducibility
... operator, the minimal measurements, the use of contrast-enhanced ultrasound. The most important factors affecting the results of liver stiffness measurements include using SWE method, the diagnostic equipment and the sensors, the measurement depth and acoustic access; the reliability of various SWE methods is approximately equivalent. Among modern ultrasonic SWE technologies, the most efficient to visualize the measurement area are ARFI technologies — point shear wave elastography (pSWE) and two-dimensional ...
Development of musical hearing during education at different musical departments
... the Brain // Scientific American. 2004. Vol. 291 (5). P. 88—95.
9. Deroche M. L. D., Limb C. J., Chatterjee M., Gracco V. L. Similar abilities of musicians and non-musicians to segregate voices by fundamental frequency // The Journal of the Acoustical Society of America. 2017. Vol. 142 (4). P. 1739—1755.
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Numerical model operation of the mass transfer of the disperse phase of aerosol in nonlinear wave fields for axisymmetric quasithree-dimensional geometrical statement
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‘The Word, an Ulcer…’: Aleksey Chicherin’s semiotic utopia
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Numerical modeling of wave processes in 3D fractured media
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Numerical solving the problem of detecting of ultraweak diffractors in a complex acoustical medium
Some results of numerical simulating of the problem of detecting of ultraweak diffractors in a complex acoustical medium are represented. The term “ultraweak” here means that the diffractors are not determined by standard depth migration. To solve the problem of detecting we use two procedures: Reverse Time Datuming (RTD) and Common Scattering Point ...
To the question of control of accuracy in solving the inverse problem microseismic
Discusses the issues of control accuracy for solving the inverse kinematics problem of microseismic. This problem is to determine coordinates of acoustic emission sources. Investigate questions of constructing optimal algorithms and the influence of noise in the data on the stability of the obtained solution. Demonstrate the effectiveness of this approach in comparison with generic algorithms ...
Use of results of interpretation of scattered waves on the CSP method at the assessment of resources of the field of hydrocarbons with fracture collectors
... 23–26.
Anokhina E., Starikov L., Kirichek A., Nazarova M., Zhegalina L., Sisembaev K., Dosmuhambetov M., Ismailov K.
seismic exploration, reflected wave, scattered wave, oil-and-gas content, fracture cavernous reservoir, porous fractured reservoir, acoustic heterogeneity
132-140
Identifying diffractors in complex acoustical media by the CSP-RTD method
The CSP (Sommon Scattering Point) method is used to identify diffrac-tors associated with cavernous fractured reservoirs of hydrocarbons. This method shows the highest efficiency in weakly inhomogeneous media. As to strongly inhomogeneous media, this method can be supplemented by the pre-liminary extension of wave field to a certain depth. To this end, the Reverse Time Datuming (RTD) procedure is used. The results of a numerical study of the joint application of RTD and CSP techniques (CSP-RTD method)...
About the method of estimating the parameters of seismic signals
... экспериментальной технике // Прикладная физика. 2011. № 4. С. 116—120.
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Principles of geological interpretation of the scattered waves field
... migration method. Abstracts of 73 EAGE Conference & Exhibition, 23—26 may 2011, Vienna.
Starikov L., Kirichek A., Kremlev A., Yerokhin G.
fracture cavernous reservoir, porous fractured reservoir, fractured zone, scattered wave, reflected wave, acoustic heterogeneity
124-130
Numerical solving the linearized inverse problem for two-parameter acoustic equation
In this paper we develop а numerical algorithm for solving inverse dynamical problem: recovering two parameters of the acoustical medium (density and compressibility modulus) by boundary measurements (response operator). The solution is based on a linearized version of the Boundary Control method: the response operator explicitly determined some bilinear energy forms ...
Numerical solution of the linearized inverse problem for acoustic equation
In this paper we develop an algorithm of numerical solution of the inverse dynamical problem about speed of sound reconstruction in horizontally layered acoustical medium. The solution is based on linearized version of the Boundary Control Method. The inverse data is the response at the single boundary point from the boundary point source; the probe pulse is the Ricker wavelet. The results of numerical ...
Efficiency of the CSP technology using in Caspian region (on the example of the North Akkar oilfield)
... газовых месторождений. 2011. № 1. С. 24—33.
Kirichek A., Starikov L., Nazarova M., Sisembaev K., Dosmuhambetov M., Ismailov K.
fracture cavernous reservoir, porous fractured reservoir, fractured zone, scattered wave, reflected wave, acoustic heterogeneity
138-143
The professional athletes’ idea of family relations
... Г., Юстицкис В. В. Психология и психотерапия семьи. СПб., 1999.
Duvanina A., Stanislavskaya I.
sports psychology, athletes’ family counselling, athletes’ family structure, athletes’ self-assessment, acoustic neuromodulation method, family sociogramme
105-113
Algebra method of the construction of the Maxwell equations in a 2D inhomogeneous dielectric
... problem. As an application, we construct some singular and nonsingular integrable potentials (dielectric permitivity) for the Maxwell equations in a 2D inhomogeneous medium.
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Intonational means of expressing the "new" and the "given" categories in English, Russian and Spanish
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Numerical recovering an absorption coefficient by BC-method
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FilatovaV....
Some features of Corncrake's ecology in the conditions of modern agriculture
This paper considers the dynamics of acoustical activity and the impact of hay harvesting and cattle grazing on the nesting of Corncrake Crex crex on three plots in the Ryazan, Vladimir, and Novgorod regions. Peak acoustic activity is achieved in June. The survival of nests and broods of ...
Similarities and differences in curricula of a bachelor’s degree in oceanology at the universities in St Petersburg, Klaipeda, and Kaliningrad
... 115—117.
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