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Nonreflected vertical propagation of acoustic waves in a strongly inhomogeneous atmosphere
Izvestia, Atmospheric and Oceanic Physic. 2012. Vol. 48. No. 2. P. 169–173.
Using the linear theory of waves in a compressible atmosphere located in a gravitational field, we found a family of sound speed profiles for which the wavefield can be represented by a traveling wave with no reflection. The vertical flux of wave energy on these nonreflected profiles is retained, which proves that the energy transfer may occur over long distances.
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English
Nikitiuk B., Lenev D., Pisarev V. et al., Journal of Colloid and Interface Science 2026 Vol. 718 Article 140444
Hypothesis:Accurate determination of interfacial tension values is crucial for many modeling applications in the oil and gas industry. However, many of the presently used empirical and theoretical models show poor prediction accuracy and do not allow for direct consideration of the concentrations of gases and salts dissolved in the system as well as the specific ...
Added: October 28, 2026
Deshchenya V., Nikolay D. Kondratyuk, Sivakova A. et al., Chemical Engineering Sciences 2027 Vol. 337 Article 124616
Accurate prediction of complex formulation viscosity is crucial for the lubricant industry and engineering processes. However, developing generalizable models remains challenging due to the complexity of industrial mixtures and the scarcity of public experimental data, often resulting from corporate proprietary restrictions. This study presents a machine-learning workflow for viscosity estimation from a proprietary pseudonymized dataset, ...
Added: October 28, 2026
Zubov A., Zubov A., Малявко, Я. et al., Computer Physics Communications 2025 Vol. 317 Article 109860
The concept of representative volume (REV, or RVE in material sciences) is the cornerstone of continuum scale models – one needs to get the volume big enough so that it could be represented with an averaged value (scalar, vector or tensorial, etc.). While REV should be established in all larger scale simulations, this is rarely ...
Added: October 28, 2026
Budkov Y., Annals of Physics 2026 Vol. 495 No. 3 Article 170796
We study the density-matrix kinetics of a charged test particle in two types of Coulomb environment. For a prescribed Gaussian potential, averaging the random-unitary dynamics leads to a Born–Novikov memory equation; Novikov’s identity is exact, but its closure requires a second-order approximation. An equilibrium quantum bath instead yields a Born–Redfield equation with ordered correlators and ...
Added: October 26, 2026
Четверикова М. М., Потемкин А. Н., Stepanova E., Бюллетень экспериментальной биологии и медицины 2026 Т. 182 № 9 С. 242–247
Gemcitabine, a first-line chemotherapeutic agent for bladder cancer (BC), often loses clinical efficacy due
to the development of drug resistance, the underlying mechanisms of which remain poorly understood. In
this work, a highly gemcitabine-resistant RT112/GR cell line was obtained by long-term selection. The MTT
assay revealed a 9312-fold decrease in gemcitabine sensitivity and moderate resistance to cisplatin (2.60-fold,
p ...
Added: October 26, 2026
Alexander S. Rabinowitch, International Journal of Modern Physics A 2026 Vol. 41 No. 30 Article 2650168
In this paper, we study a new class of wave solutions to the SU(2) Yang-Mills equations in the
region outside field sources. They represent a significant addition to the wave solutions obtained
in our previous publications describing non-Abelian transverse progressive waves propagating
in the direction of the Cartesian z-axis. In the new paper, wave solutions to the considered
system ...
Added: October 26, 2026
D.V. Khomitsky, Lavrukhina E. A., Krasavin D. P. et al., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 No. 22 Article 225414
We study coherent electric manipulation of magnetic field induced localized states at a double kink of a helical edge in a HgTe/CdHgTe quantum well. An in-plane magnetic field opens a gap in the one-dimensional (1D) edge spectrum, while changes in the edge orientation generate localized in-gap states at the kinks. We show that, for suitable ...
Added: October 23, 2026
Maltseva D., Tonevitsky A., Frontiers in Molecular Biosciences 2026 Vol. 13 P. 1–28
MicroRNA (miRNA) genes are frequently located in close proximity within the genome, forming so-called clusters. These clusters are transcribed as polycistronic units, suggesting coordinated transcriptional regulation of the miRNAs they contain. However, individual mature miRNAs from the same cluster often accumulate at varying levels and exhibit distinct tissue-specific expression patterns, indicating the presence of regulatory ...
Added: October 23, 2026
Vasilyev A., Svirin EP, Dubynin I. et al., Cortex 2025 Vol. 189 P. 76–96
Added: October 22, 2026
Karina V. Klycheva, Mariia O. Silkina, Dmitry M. Hushpulian et al., Biochemistry. Biokhimiia 2026 Vol. 91 P. 1842–1858
Involvement of the transcription factor Bach1 in various scenarios of cellular regulation is reviewed herein. To date, the most extensively studied role of Bach1 is that of a repressor of the antioxidant genetic program initiated by the Nrf2 factor. This program counteracts oxidative stress, which triggers both ferroptosis and the intrinsic apoptotic pathway. Bach1 functions unrelated ...
Added: October 22, 2026
Svirin E., Бердышев Д. А., Шишкин С. Л., Вестник Российского государственного медицинского университета 2026 № 3 С. 42–50
Quasi-movements (QMs), which are movement attempts minimized to the point of movement extinction, evoke EEG patterns similar to those of real movement. QMs can model attempted movement in healthy subjects and are therefore of interest as an alternative to motor imagery (MI) in rehabilitation brain–computer interfaces (BCIs), in which the attempted movement of the paralyzed ...
Added: October 22, 2026
Sitdikova K., Tsoy A., Chaprov K. et al., Journal of Neuropathology and Experimental Neurology 2026 Article nlag078
Understanding the earliest pathological changes in Alzheimer disease (AD) is critical for improving early intervention strategies. However, the relationship between amyloid plaque characteristics and early behavioral and molecular alterations remains unclear. We used 6-month-old female APPswe/PS1dE9 mice, a model of early amyloid-dominant pathology, to assess cognition and emotionality across a battery of behavioral tests. Amyloid ...
Added: October 22, 2026
Effects of Wheat Malt Extract on Molecular and Behavioral Markers in Aged APP/PS1 and Wild-Type Mice
Kassenova A., Svirin E., Sitdikova K. et al., International Journal of Molecular Sciences 2026 Vol. 27 No. 11 Article 4994
Added: October 22, 2026
Cespuglio R., Schmitt-Böhrer A., Deykin A. et al., Metabolites 2026 Vol. 16 No. 2 Article 117
Added: October 22, 2026
Budkov Y., Kalikin N., Journal of Chemical Physics 2026 Vol. 165 No. 16 Article 164108
We derive the local pressure tensor generated by the original Rosenfeld fundamental measure theory (FMT) for hard-sphere fluids from an arbitrary infinitesimal deformation. The variation of a finite-distance FMT kernel is written via the line integrals of the local deformation gradient along the straight segment connecting its end points. The resulting symmetric pressure tensor consists ...
Added: October 22, 2026
Tomsk: Национальный исследовательский Томский политехнический университет, 2020.
В сборнике отражены проблемы палеонтологии, стратиграфии, тектоники, исторической и региональной геологии, минералогии, геохимии, петрологии, литологии, полезных ископаемых, металлогении, гидрогеологии, гидрогеохимии, инженерной геологии, геофизики, нефтяной геологии, геоинформационных систем в геологии, разработки нефтяных и газовых месторождений, переработки углеводородного и минерального сырья, нефтегазопромыслового оборудования, бурения нефтяных и газовых скважин, техники и технологии разведки и добычи, транспорта и хранения ...
Added: October 22, 2026
Ивченко В. С., Иевлева В. А., Matienko D. et al., Журнал технической физики 2026 № 9 С. 1738–1749
Задача о возбуждении бегущих фонон-поляритонных волн на поверхности полярного кристалла падающей извне световой волной (с частотой, близкой к частоте решеточных колебаний) решена теоретически только для бесконечной открытой поверхности кристалла. В случаях, когда часть поверхности покрыта металлической маской, препятствующей проникновению возбуждающего излучения к атомам среды, и эта маска имеет произвольную форму, общепризнанного решения неоднородной задачи нет. ...
Added: October 20, 2026
Logvenkov S. A., Известия РАН. Механика жидкости и газа 2026 № 3 С. 59–75
The problem of the evolution of cell volume fraction in a spherical aggregate composed of cells,
extracellular matrix, and fluid is considered. The aggregate is surrounded by extracellular matrix. The
problem formulation employs a multiphase model of a biological continuum, previously developed by the
author, consisting of two actively interacting solid phases and a fluid. The propagation of ...
Added: October 20, 2026
Lavrukhina E. A., Krasavin D. P., Krishtopenko S. S. et al., Physical Review B: Condensed Matter and Materials Physics 2026 Vol. 114 No. 22 Article 225414
We study coherent electric manipulation of magnetic field induced localized states at a double kink of a helical edge in a HgTe/CdHgTe quantum well. An in-plane magnetic field opens a gap in the one-dimensional (1D) edge spectrum, while changes in the edge orientation generate localized in-gap states at the kinks. We show that, for suitable ...
Added: October 19, 2026
Timur Teregulov, Elena R. Loubenets, / Series Quantum Physics "arXiv". 2026. No. 2609.31472.
We develop a new three-party quantum secret-sharing (QSS) protocol based on a three-qubit W state. This protocol encodes the secret-sequence bits using X gates and employs randomly selected Hadamard operations and measurement bases to generate information and security-test rounds. We evaluate the efficiency of the proposed protocol and analyze its security against an internal adversary ...
Added: September 28, 2026
Levashev V., / Series arXiv "math". 2026. No. 2609.06010.
We prove that continuous A-bilinear pairings on the ring of Laurent series that are invariant under continuous automorphisms coincide, up to a constant, with the pairing given by the residue of a differential form over any commutative associative ring with identity. ...
Added: September 24, 2026
Pyatov P. N., Pivovarov P. A., / Series math "arxiv.org". 2026. No. 2609.06274.
We investigate a special ansats that allows for an iterative solution of the constant Yang-Baxter equation. Testing this ansatz, we construct four sequences of the constant R-matrices. In each sequence the R-matrices act on the tensor squares of vector spaces of linearly growing dimensions. Each R-matrix also depends on a single complex parameter.
By analyzing the ...
Added: September 24, 2026
Medvedev V., / Series arXiv "math". 2026.
We study complete static manifolds with boundary admitting a nowhere-vanishing static potential. Our main result shows that, under a natural lower bound relating the scalar curvature and the boundary mean curvature, a simple static manifold with boundary must in fact have positive scalar curvature, negative boundary mean curvature, and be compact; we also obtain explicit ...
Added: September 19, 2026
Poddiakov A., / Series Social Science Research Network "Social Science Research Network". 2026. No. 7437658.
Clarity of knowledge and reasoning is necessary in many cases. Yet vagueness in scientific thinking related to surprise, curiosity, "ability to engage with not-knowing" (de Freitas) and abductive reasoning is also a crucially important source of scientific creativity which supplements combinatorial logic when dealing with the already known. Starting from studies by C. S. Peirce ...
Added: September 15, 2026