460 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Academy of Sciences of UkraineUA46 papers
- Bogolyubov Institute for Theoretical PhysicsUA36 papers
- Institute of PhysicsPL31 papers
- Taras Shevchenko National University of KyivUA21 papers
- Institute of MagnetismUA16 papers
- Institute for Information RecordingUA13 papers
- Clarkson UniversityUS12 papers
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicCZ12 papers
- Institute of MathematicsPL12 papers
- Frantsevich Institute for Problems in Materials ScienceUA11 papers
- Institute for Nuclear ResearchRU9 papers
- Johannes Gutenberg University MainzDE8 papers
245 papers
Visitation measures for non-linear iterations with random perturbations
Andrey A. Dorogovtsev, Iryna Nishchenko
A sequence of non-linear iterations with non-identically distributed random perturbations is studied. The asymptotic behaviour of the sequence is described via its visitations meas…
Effects of Curvature-Scalar Coupling on Vacuum Energy in Flat (3+1)-Dimensional Space-Time
Volodymyr Gorkavenko, Oleh Barabash, Pavlo Nakaznyi +3
We investigated how a magnetic topological defect affects the vacuum polarization of a charged massive scalar field in a flat -dimensional space-time. The defect was modeled…
Broadening the temperature range of blue phases using compounds of various molecular geometries assembled from modular "LEGO" molecular units
Igor A. Gvozdovskyy, Vitalii O. Chornous, Halyna V. Bogatyryova +5
The temperature range of the blue phases (BPs) formed in highly chiral mixtures based on cholesteryl oleyl carbonate (COC) and the nematic liquid crystal E7 was studied in the pres…
Equilibrium kink-like torsion deformation of a magnetoactive elastomer under a magnetic field
Yu. I. Dzhezherya, A. V. Kyryliuk, S. V. Cherepov +4
A novel effect involving the formation of a stable kink-like torsion deformation in a magnetoactive elastomer (MAE) beam subjected to a uniform magnetic field is theoretically pred…
Multimodal system for skin cancer detection
Volodymyr Sydorskyi, Igor Krashenyi, Oleksii Yakubenko
Melanoma detection is vital for early diagnosis and effective treatment. While deep learning models on dermoscopic images have shown promise, they require specialized equipment, li…
Coexistence of Ferroelectric and Relaxor-like Phases in a Multiferroic Solid Solution (1-x)Pb(FeNb)O-xPbMnO
Anna N. Morozovska, Victor N. Pavlikov, Yuriy O. Zagorodniy +7
Experimental and theoretical studies of unusual polar, dielectric and magnetic properties of room temperature multiferroics, such as perovskites Pb(FeNb)O (PFN)…
Identification of formation of amorphous Si phase in SiOxNy films produced by plasma enhanced chemical vapor deposition
M. V. Voitovych, A. Sarikov, V. O. Yukhymchuk +2
Peculiarities of formation of inclusions of amorphous Si (a-Si) phase in Si-rich Si oxynitride films grown by plasma-enhanced chemical vapor deposition (PECVD) are studied by combi…
Low and high frequency noise in LEDs
Danylo Bohomolov, Vita Ivanova, Ulrich T. Schwarz
LED degradation is usually associated with defects in the active region. Whereby the noise analysis can be a strong instrument to reveal them. The results of optical noise measurem…
Magnetic properties and charge transport mechanisms in oxygen-deficient HfxZr1-xO2-y nanoparticles
Oleksandr S. Pylypchuk, Eugene A. Eliseev, Andrii V. Bodnaruk +12
Study of nanoscale hafnia-zirconia physical properties is the key topic in fundamental and applied science. However, charge transport mechanisms and magnetic properties of hafnia-z…
Impact of space-time curvature coupling on the vacuum energy induced by a magnetic topological defect in flat space-time of arbitrary dimension
V. M. Gorkavenko, O. V. Barabash, I. V. Ivanchenko +4
We have investigated vacuum polarization of a quantized charged massive scalar field in the presence of a magnetic topological defect, modeled as an impenetrable tube of finite thi…
Use of Physicochemical Modification Methods for Producing Traditional and Nanomodified Polymeric Composites with Improved Operational Properties
Aleksandr E. Kolosov, Volodymyr I. Sivetskii, Elena P. Kolosova +5
Various aspects of the methods of physical and physicochemical modification of components of filled thermoplastic composite materials are analyzed, aimed at improving the surface p…
Inclusion of the Longitudinal Momentum-Transfer Component and Kinematic Factors in a diffraction approach for H(d,p)X Reactions
Ya. D. Krivenko-Emetov, B. I. Sidorenko
In this work, within the framework of the Glauber-Sitenko approximation, an analysis of the differential cross section for deuteron breakup into a proton in the reaction H(d,p)X is…
Colossal dielectric response of HfxZr1-xO2 nanoparticles
Oleksandr S. Pylypchuk, Victor V. Vainberg, Vladimir N. Poroshin +10
We reveal a colossal dielectric response of small (5 - 10 nm) oxygen-deficient HfxZr1-xO2 nanoparticles (x = 1 - 0.4), prepared by the solid-state organonitrate synthesis. The effe…
Visible Light Indoor Positioning with a Single LED and Distributed Single-Element OIRS: An Iterative Approach with Adaptive Beam Steering
Daniele Pugliese, Giovanni Iacovelli, Alessio Fascista +4
The integration of Optical Intelligent Reflective Surfaces (OIRSs) into Visible Light Communication (VLC) systems is gaining momentum as a valid alternative to RF technologies, har…
AI-Driven Tools in Modern Software Quality Assurance: An Assessment of Benefits, Challenges, and Future Directions
Ihor Pysmennyi, Roman Kyslyi, Kyrylo Kleshch
Traditional quality assurance (QA) methods face significant challenges in addressing the complexity, scale, and rapid iteration cycles of modern software systems and are strained b…
High-Frequency and Microwave Magnetic Properties of NiZnFeO Spinel Ferrite Ceramics
M. Kempa, V. Bovtun, V. Kukhar +5
Magnetic properties of the NiZnFeO (NZF) spinel ferrite ceramics were studied over a broad frequency range (1 MHz - 50 GHz). Between 10 MHz and 2 GHz, stron…
Strain-Gradient and Curvature-Induced Changes in Domain Morphology of BaTiO3 Nanorods: Experimental and Theoretical Studies
Olha A. Kovalenko, Eugene A. Eliseev, Yuriy O. Zagorodniy +7
We investigate the impact of OH- ions incorporation on the lattice strain and spontaneous polarization of BaTiO3 nanorods synthesized under different conditions. It was confirmed t…
Stable partial dislocation complexes in GaN as charge carrier lifetime modifiers for terahertz device applications by molecular dynamics and first-principle simulations
Andrey Sarikov, Ihor Kupchak
Wurtzite GaN is a promising material for applications in photoconductive THz radiation sources. For this purpose, the photogenerated charge carriers lifetime of the order of tenths…
Estimation of accuracy and reliability of models of -sub-Gaussian stochastic processes in spaces
Oleksandr Mokliachuk
At present, in the theory of stochastic process modeling a problem of assessment of reliability and accuracy of stochastic process model in space wasn't studied for the case…
Modeling of stochastic processes in using orthogonal polynomials
Oleksandr Mokliachuk
In this paper, models that approximate stochastic processes from the space with given reliability and accuracy in are considered for some specific functions $φ(…
Chain recurrence and structure of omega-limit sets of multivalued semiflows
Oleksiy V. Kapustyan, Pavlo O. Kasyanov, José Valero
We study properties of !-limit sets of multivalued semiflows like chain recurrence or the existence of cyclic chains. First, we prove that under certain conditions the omega-limit…
Humanity's Last Exam
Long Phan, Alice Gatti, Ziwen Han +1168
Benchmarks are important tools for tracking the rapid advancements in large language model (LLM) capabilities. However, benchmarks are not keeping pace in difficulty: LLMs now achi…
Transformation of the trapped flux in a SC disc under electromagnetic exposure
V. V. Chabanenko, I. Abaloszewa, V. F. Rusakov +6
Superconducting permanent magnets (SCs) with trapped magnetic flux are used in technical devices (motors, generators, etc.). These magnets endure repeated magnetic "shocks" during…
The origin of the ferroelectric-like orthorhombic phase in oxygen-deficient HfO2-y nanoparticles
Eugene A. Eliseev, Iryna V. Kondakova, Yuri O. Zagorodniy +6
In this work we established the relationship between the crystalline structure symmetry, point defects and possible appearance of the ferroelectric-like polarization in HfO2-y nano…