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Radioprotective Protein of Tardigrades Dsup (Damage Suppressor) is Resistant to High Doses of Ionizing Radiation Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 M. P. Zarubin, A. F. Nizamieva, S. I. Alexeev, S. V. Mitrofanov, Y. E. Gorshkova, E. V. Kravchenko
Abstract The unique protein Dsup of the tardigrade Ramazzottius varieornatus increases resistance to radiation and oxidative stress in various organisms and in human cell culture. According to simulation data, Dsup forms a complex with DNA with an intermolecular distance of \({\sim}4\) Å, as a result of which DNA is less damaged by reactive oxygen species generated during radiation exposure. However
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On Activation Studies of Photonuclear Reactions on $${\gamma}$$ -Beams from Backward Compton Scattering at $$\boldsymbol{E}_{{\gamma}}\boldsymbol{\leq 40}$$ MeV Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 S. S. Belyshev, V. V. Varlamov, L. Z. Dzhilavyan, A. A. Kuznetsov, A. M. Lapik, A. L. Polonski, A. V. Rusakov, V. I. Shvedunov
Abstract Proposed as initial activation experiments for photonuclear research with \(\gamma\)-quanta at energies \(E_{\gamma}\leq 40\) MeV are those using a source of backward Compton scattered laser radiation on accelerated electrons, which is currently under development. These experiments are crucial both for refining the techniques of tuning and monitoring such \(\gamma\)-beams, and for investigating
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Behaviour of the Geomagnetic Field during Reversals and Excursions Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 M. Yu. Reshetnyak
Abstract As demonstrated by a three-dimensional geodynamo model, during reversals and excursions of the geomagnetic field, with small amplitudes of heat sources, there occurs attenuation not only of the dipolar magnetic field but also of the high harmonic field. In this scenario, the Earth’s magnetosphere can be significantly smaller than previously expected, and correspondingly, the amount of radiation
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Model of Surface Nanorelief Formation under Irradiation with Gas Cluster Ions Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 D. R. Bessmertniy, A. E. Ieshkin
Abstract A model for the evolution of surface nanorelief under irradiation with gas cluster ions is proposed. The model is based on the consideration of individual cluster collisions with a surface. The amount of material sputtered from the collision area and the efficiency of its redeposition on other surface elements are determined. The model’s performance is demonstrated through comparison with
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Creation of the Indirect-Drive Cryogenic Target with the Solid Deuterium Layer Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 E. Yu. Zarubina, M. A. Rogozhina, I. A. Chugrov
Abstract An indirect-drive cryogenic target is necessary for research in the field of laser thermonuclear fusion at a megajoule energy level facility. Solid fuel layer in the target must meet high requirements: a roughness of the inner cryolayer surface must be less than 1 \(\mu\)m, deviations from the sphericity and the concentricity must be less than 1\(\%\). This paper describes the results of the
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Dynamics of Plasma in a Dual-Frequency Capacitive Discharge in an Ar/Xe Mixture Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 M. A. Bogdanova, D. G. Voloshin, A. V. Glotov, D. V. Lopaev, N. N. Sysoev, D. R. Shibanov
Abstract The spatio-temporal dynamics of plasma in a symmetrical dual-frequency 81 MHz/1.76 MHz capacitive discharge under the influence of a low-frequency 1.76 MHz field has been studied. Using phase-resolved optical emission spectroscopy, the dynamics of argon and xenon emission intensity in the plasma was obtained. Measurements of the electron energy probability function (EEPF) at the center of
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New Infrared Camera of the Caucasian Mountain Observatory of the SAI MSU: Design, Main Parameters, and First Light Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 S. G. Zheltoukhov, A. M. Tatarnikov, A. A. Belyakova, E. A. Koksharova
Abstract This paper presents a prototype of an infrared photometer, created at the Sternberg Astronomical Institute, Lomonosov Moscow State University (SAI MSU), based on the commercial infrared module Gavin-615A. The operating spectral range of the photometer is 3–5 \(\mu\)m. Investigations of the photometer’s detector have shown that its parameters coincide with those stated by the manufacturer.
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Multibit Upsets of Onboard Spacecraft Electronics from a Single Cosmic Radiation Particle Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 N. G. Chechenin, N. V. Novikov, A. A. Shirokova
Abstract An analysis of the impact of high-energy cosmic radiation protons on the onboard electronics of the spacecraft was performed. It has been shown that protons can cause nuclear reactions with the atomic nuclei of electronics material. Residual nuclei formed as a result of a nuclear reaction have sufficiently high energy to cross the sensitive areas of several bits of electronics, and the high
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Thermoregulation System for Biosensors Based on Field-Effect Transistors with a Nanowire Channel Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-04-01 G. V. Nibudin, I. I. Tsiniaikin, G. V. Presnova, M. Yu. Rubtsova, A. A. Popov, P. O. Mikhailov, A. S. Trifonov, O. V. Snigirev, V. A. Krupenin, D. E. Presnov
Abstract In this work, an automatic thermoregulation system for biosensors based on field-effect transistors with a nanowire channel is demonstrated, providing full control and maintenance of the required temperature regime in bioanalytical analyses. The system elements, including field-effect transistors with a nanowire channel, temperature sensors, and heaters, were fabricated on a single silicon
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Characterization of Secondary Neutron Spectra from Therapeutic Proton and Carbon Ion Beams Using PHITS Simulation Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-03-10 Mohamed El-Asery, Zouhair Sadoune, Hassane El Bekkouri, El Mehdi Al Ibrahmi, Abdessamad Didi, El Mahjoub Chakir
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On the Possibility of Observing Tetraquarks in the $$\boldsymbol{K^{+}}$$ Beam Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-03-10 A. S. Gerasimov, A. K. Likhoded, V. A. Petrov, V. D. Samoylenko
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Mechanical Alloying of Iron–Titanium–Carbon (Diamond) Compositions Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-03-10 S. A. Kovaliova, T. Yu. Kiseleva, T. F. Grigoreva, V. I. Zhornik, E. T. Devyatkina, S. V. Vosmerikov
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Investigation of the Magnetic, Structural, and Electronic Properties of Pt/[Pt/Co] $${}_{\mathbf{4}}$$ /Pt Thin Film by Experimental and Theoretical Methods Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-03-10 Taner Kalayci
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Simulation of Particle Interactions with Matter Using PHITS Monte Carlo Code: Physical Aspects of Bragg Curve for Carbon Ion Therapy Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-03-10 Hassane El Bekkouri, El Mehdi Al Ibrahmi, Mohamed El-Asery, Zouhair Sadoune, Adil Bardane, Abdessamad Didi, El Mahjoub Chakir
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Reaction-Diffusion Systems with Nonlinear Sources of Different Intensities in the Case of Multiple Root without Quasimonotonicity Condition Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-03-10 R. E. Simakov
Abstract The boundary value problem for a singularly perturbed system of two second-order ordinary differential equations with different powers of a small parameter at the second derivatives is considered without requiring the right-hand sides to be quasimonotonic. The specific feature of the problem is that one of the two equations of the degenerate system has a double root. It is proven that for
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Conductivity of Hafnium Oxide Films Obtained by Electron-Beam Sputtering Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract Hafnium oxide films HfO \({}_{x}\) with a thickness of about 40 nm were obtained by electron beam sputtering at different oxygen flow rates in the chamber. The electrophysical properties of the films were studied in air and in a vacuum. It has been shown that the temperature dependences of film conductivity, measured in a vacuum in the temperature range from 20 to 180 \({}^{\circ}\) C, have
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Determining the Presence of Packing Defects in Palladium-Based Alloys by X-Ray Diffraction Method Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract The alloys studied in this work are of interest for the needs of hydrogen energy, electronics, pharmacology. The goal is to identify the regularities of the evolution of defect subsystems, which is necessary for the development of processes to improve the performance indicators of metallic systems. An analysis of the imperfections of the crystal lattice of the alloys Pd \({}_{93.5}\) In \({}_{6
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Stresses in Silicon Dioxide Films Deposited from Dielectric Targets: Results of Atomistic Modelling Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract The previously proposed method of molecular dynamics modelling for the sputter deposition of thin films from metal targets has been adapted for the case of dielectric targets and applied to silicon dioxide films. The possibility of the ejection from targets of not only silicon atoms but also clusters with oxygen atoms is taken into account by adding O=Si=O molecules to the flow of deposited
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Anomalous Band Bending in the (K $${}_{\mathbf{0.8}}$$ Na $${}_{\mathbf{0.2}}$$ ) $${}_{\mathbf{0.8}}$$ Fe $${}_{\mathbf{1.8}}$$ Se $${}_{\mathbf{2}}$$ Superconductor Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract Iron chalcogenides intercalated with alkali metal atoms attract the attention of physicists due to their unusual natural phase segregation, where superconducting clusters form at the boundaries of the antiferromagnetic phase. In this work, using photoelectron spectroscopy, we discovered an unusual effect that presumably arises due to this phase segregation. We studied temperature dependences
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Plasmon Energy Losses of Electrons in Multilayer Dielectric Structures Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract The possibilities of engineering energy losses, created in the cascade process of electron-electron scattering during the interaction of multilayer dielectric structures with ionizing radiation, are considered. It is shown that the contribution of surface plasmons associated with layer boundaries to electron energy losses is significant only for nanometer layer thicknesses and increases with
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On Preferential Sputtering of Alloys under Ion Bombardment Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract An analysis of both experimental and theoretical data on the study of preferential sputtering of nickel-based and copper-platinum alloys under ion beam bombardment has been carried out. Contrary to existing models, it has been shown that the main factor determining the process of preferential sputtering is the ratio of the surface binding energies of the components.
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Consideration of the Distribution of Noise Level by Wavelength in Broadband Control of the Optical Coating Deposition Process Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract In the study, numerical results of simulations for the deposition process of a complex optical coating are presented, utilizing broadband monitoring of this process in the case where the noise level in the measured transmittance coefficient has a nonuniform distribution across the wavelength. The influence on the accuracy of control data at the edges of the measured wavelength range, where
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Magneto–Optical Kerr Spectroscopy of (Cd $${}_{\boldsymbol{3}}$$ As $${}_{\boldsymbol{2}}$$ ) $${}_{\boldsymbol{100-X}}$$ (MnAs) $${}_{\boldsymbol{X}}$$ Composites Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-02-01
Abstract Composite films of (Cd \({}_{3}\) As \({}_{2}\) ) \({}_{100-X}\) (MnAs) \({}_{X}\) on silicon and sitall substrates with Mn concentration of 5.8–16.4 at \(\%\) were obtained by vacuum-thermal evaporation. The structural properties of the films were investigated by X-ray phase analysis and scanning electron microscopy. Magneto-optical properties were studied using the transverse Kerr effect
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Foreword Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. P. Kryukov
Abstract Foreword to the 7th International Conference on Deep Learning in Computational Physics (DLCP2023), held at the Faculty of Physics of St. Petersburg State University from June 21 to 23, 2023.
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Generation of the Ground Detector Readings of the Telescope Array Experiment and the Search for Anomalies Using Neural Networks Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 R. R. Fitagdinov, I. V. Kharuk
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Neural Network Approach to Impact Parameter Estimation in High-Energy Collisions Using Microchannel Plate Detector Data Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 K. A. Galaktionov, V. A. Roudnev, F. F. Valiev
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Decomposition of Spectral Band into Gaussian Contours Using an Improved Modification of the Gender Genetic Algorithm Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 G. A. Kupriyanov, I. V. Isaev, I. V. Plastinin, T. A. Dolenko, S. A. Dolenko
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SMAP Sea Surface Salinity Improvement in the Arctic Region Using Machine Learning Approaches Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. S. Savin, M. A. Krinitskiy, A. A. Osadchiev
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Study of the Integration of Physical Methods in Neural Network Solution of the Inverse Problem of Exploration Geophysics with Variable Physical Properties of the Medium Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 I. V. Isaev, I. E. Obornev, E. A. Obornev, E. A. Rodionov, M. I. Shimelevich, S. A. Dolenko
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Selection of Gamma Events from IACT Images Using Deep Learning Methods Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 E. O. Gres, A. P. Kryukov, A. P. Demichev, J. J. Dubenskaya, S. P. Polyakov, A. A. Vlaskina, D. P. Zhurov
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Client-Server Application for Automated Estimation of Bottom Sediment Composition in the Fraction >0.1 mm from Microphotography Using Modern Deep Learning Methods Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 V. A. Golikov, M. A. Krinitskiy, D. G. Borisov, E. I. Riazanova
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Generating Synthetic Images of Gamma-Ray Events for Imaging Atmospheric Cherenkov Telescopes Using Conditional Generative Adversarial Networks Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 Yu. Yu. Dubenskaya, A. P. Kryukov, A. P. Demichev, S. P. Polyakov, D. P. Zhurov, E. O. Gres, A. A. Vlaskina
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Recognition of Skin Lesions by Images Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 M. A. Ledovskikh, V. I. Gorikhovskii
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Application of Convolutional Neural Networks for Data Analysis in TAIGA-HiSCORE Experiment Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. P. Kryukov, A. A. Vlaskina, S. P. Polyakov, E. O. Gres, A. P. Demichev, Yu. Yu. Dubenskaya, D. P. Zhurov
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Machine Learning Techniques for Anomaly Detection in High-Frequency Time Series of Wind Speed and Greenhouse Gas Concentration Measurements Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. J. Kasatkin, M. A. Krinitskiy
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Deep Learning Methods for Tasks of Creating Digital Twins for Technological Processes Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 I. S. Lazukhin, M. I. Petrovskiy, I. V. Mashechkin
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Deep Learning for Arrival Angle Prediction in the Baikal Neutrino Telescope Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. Yu. Leonov, O. E. Kalashev, I. V. Kharuk
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The Use of Conditional Variational Autoencoders for Simulation of EAS Images from IACTs Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. P. Kryukov, S. P. Polyakov, A. A. Vlaskina, E. O. Gres, A. P. Demichev, Yu. Yu. Dubenskaya, D. P. Zhurov
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Identifying Cetacean Mammals in High-Resolution Optical Imagery Using Anomaly Detection Approach Employing Machine Learning Models Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 I. A. Khabutdinov, M. A. Krinitskiy, R. A. Belikov
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Hyperparameter Tuning of Neural Network for High-Dimensional Problems in the Case of Helmholtz Equation Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 D. N. Polyakov, M. M. Stepanova
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Application of Machine Learning Methods in Baikal-GVD: Background Noise Rejection and Selection of Neutrino-Induced Events Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2024-01-17 A. V. Matseiko, I. V. Kharuk
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Influence of Spatial Dispersion in Metal on Optical Characteristics of a Magnetoplasmonic Layered Nanoparticle Cluster Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 Yu. A. Eremin, A. S. Penzar
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Multiphoton Quantum Teleportation Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 A. V. Belinsky, A. P. Grigorieva, I. I. Dzhadan
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Study of the Surface Features of Palladium-Based Alloys Using Atomic Force Microscopy and Magnetic Force Microscopy Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 O. V. Akimova, T. P. Kaminskaya, V. V. Popov
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Magnetic Hysteresis of Sm $${}_{\boldsymbol{1-x}}$$ Gd $${}_{\boldsymbol{x}}$$ Co $${}_{\mathbf{3}}$$ Cu $${}_{\mathbf{2}}$$ Alloys Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 V. E. Sevrykov, O. B. Dyogteva, A. Yu. Karpenkov, A. I. Ivanova, E. M. Semenova
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Molecular Modelling of Pro-Gly Glyproline and Its Complexes Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 L. I. Ismailova, G. A. Akverdieva, S. D. Demukhamedova, N. A. Akhmedov
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Dispersive Element of the Compact Spectrometer Based on Photonic Crystal with a Modulated Photonic Bandgap Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 N. I. Pyshkov, S. E. Svyakhovskiy
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Lyapunov Exponent and the Growth Rate of Geodesic Deviation in the Jacobi Equation with Random Curvature Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 A. E. Mammadova, D. D. Sokoloff
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Effect of Underwater Relief on the Dynamics of the Autumnal Thermal Bar Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 B. O. Tsydenov
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Modified Method of Round Gaussian Rings. Application to the Two-Planetary Problem Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 B. P. Kondratyev, V. S. Kornoukhov, E. V. Basova
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Hypernuclei and Neutron Stars with Charge Symmetry Breaking Hyperonic Potential Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 D. E. Lanskoy, S. A. Mikheev, S. V. Sidorov, T. Yu. Tretyakova
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Characteristics of the Dineutron Periphery of the $${}^{\mathbf{14}}$$ C( $$\boldsymbol{g.s.}$$ ) Nucleus, Manifesting in the Reaction $${}^{\mathbf{12}}$$ C( $$\boldsymbol{t,p}$$ ) $${}^{\mathbf{14}}$$ C Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 L. I. Galanina, N. S. Zelenskaya
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Estimation of Frequencies and Q-Factors of Earth’s Low-Frequency Toroidal Normal Modes Using Strain Data Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 A. E. Olshansky, M. P. Vinogradov, V. K. Milyukov
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Vacuum Polarization in the Cosmic-String Background Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 Y. V. Grats, P. Spirin
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Cauchy Problem for a Singularly Perturbed Delay Equation Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-03 N. T. Levashova, N. A. Mikheev
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Experimental Study of Wind Interaction with a Wave Induced by a Wave Generator in a Direct Channel Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-01
Abstract An experimental study has been conducted on the effect of wind blowing on a wave induced by a wave generator in a direct channel. It is shown that with a small wave steepness \(ak<0.1\) and wind speed \(W<2.3\) m/s, a drift current is generated on the water surface due to the action of viscous forces. A formula for calculating its velocity is proposed. It has been found that the phase velocity
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Latest Advances in Scanning Ion-Conductance Microscopy and Nanopipette Systems for Single-Cell Analysis under Serial Conditions Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-01
Abstract Studying single cells opens opportunities for understanding many biological processes and, as a consequence, plays an important role in the development of biomedicine. Scanning ion conductance microscopy (SICM) and nanopipette systems for the analysis of single cells represent a powerful tool for investigating the morphological, mechanical, and biochemical features of living cells with nanometer
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Novelty Detection Neural Networks for Model-Independent New Physics Search Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-01
Abstract Recent advancements in model-independent approaches in high energy physics have encountered challenges due to the limited effectiveness of unsupervised algorithms when compared to their supervised counterparts. In this paper, we present a novel approach utilizing a one-class deep neural network (DNN) to achieve accuracy levels comparable to supervised learning methods. Our proposed novelty
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Classification Approach to Prediction of Geomagnetic Disturbances Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-12-01
Abstract Magnetic storms can cause disruptions in the operation of radio communications, pipelines, power lines, and electrical networks, and they may possibly cause human health problems. Therefore, prediction of geomagnetic disturbances is of great practical value. Geomagnetic disturbances are usually described with the help of geomagnetic indices, including the planetary index \(K_{\textrm{p}}\)
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Test Experiment on Determining the Cluster Structure of Highly Excited States of $${}^{6}$$ Li Moscow Univ. Phys. Bull. (IF 0.3) Pub Date : 2023-10-23 M. V. Mordovskoy, A. A. Kasparov, A. A. Afonin, V. P. Zavarzina, A. S. Kurlovich, V. V. Mitcuk, I. V. Surkova