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THE GLOBAL EXISTENCE OF STRONG SOLUTIONS FOR A NON-ISOTHERMAL IDEAL GAS SYSTEM

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Acta Mathematica Scientia 2024年第3期44卷 865-886页

作者：韩斌赖宁安 andrei TARFULEA Department of Mathematics Hangzhou Dianzi UniversityHangzhou310018China School of Mathematical Sciences Zhejiang Normal UniversityJinhua321004China Department of Mathematics Louisiana State UniversityBaton Rouge70803USA

We investigate the global existence of strong solutions to a non-isothermal ideal gas model derived from an energy variational *** first show the global wellposedness in the Sobolev space H^(2)(R^(3)) for solutions near equilibrium through iterated energy-type bounds and a continuity *** then prove the global well-posedness in the critical Besov space B^(3/2)_(2,1) by showing that the linearized operator is a contraction mapping under the right circumstances.

关键词： thermal fluid equations energy-variational method well-posedness theory for PDE paraproduct calculus

Design of broadband terahertz vector and vortex beams: I. Review of materials and components

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Light(Advanced Manufacturing) 2022年第4期3卷 126-144页

作者： Nikolay V.Petrov Bogdan Sokolenko Maksim S.Kulya andrei gorodetsky Aleksey V.Chernykh Digital and Display Holography Laboratory ITMO UniversitySt.Petersburg 197101Russia V.I.Vernadsky Crimean Federal University Simferopol 295007Russia School of Physics and Astronomy University of BirminghamBirmingham B152TTUK

In this paper,we review the existing approaches for vortex and vector beam shaping and generation in the terahertz frequency *** particular focus of this review is on the possibility of homogeneous topological charge formation in the ultra-wide spectral interval inherent to ultrashort terahertz *** review the available materials and components,analyse proposed and potentially possible solutions for broadband terahertz vortex and vector beam shaping,compare all developed approaches,and put forward a unified concept for constructing passive shapers of such beams from the existing component base.

关键词： Terahertz radiation Vortex beams Vector beams Achromatic wave plates Broadband terahertz radiation Digital holography Terahertz holography Total internal reflection Metasurface THz liquid crystals Geometric phase

Design of broadband terahertz vector and vortex beams: II. Holographic assessment

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Light(Advanced Manufacturing) 2022年第4期3卷 14-26页

In this paper,we demonstrate the capabilities of the terahertz pulse time-domain holography in visualisation,simulation,and assessment of broadband THz vortex beam formation dynamics upon its shaping by elements of beam converter,and further propagation and *** adding Jones matrix formalism to describe broadband optical elements,we highlight the differences in the spatio-spectral and spatio-temporal structure of the formed vortex and vector beams dependence on the modulator used and visualise their modal *** influence of diffraction field structure from each element in the broadband vortex modulator is revealed in numerical simulation and the formed beams are analysed against the simplified Laguerre-Gaussian beam model.

关键词： Terahertz radiation Vortex beams Vector beams Achromatic wave plates Broadband terahertz radiation Digital holography Terahertz holography

Helium Plasma Effects on Polymer Surfaces:from Plasma Parameters and Surface Properties towards Bioengineering Applications

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Chinese Journal of Polymer Science 2024年第8期42卷 1156-1166页

作者： andrei Vasile Nastuta Maria Butnaru Byron Cheatham Ramona Huzum Vasile Tiron Ionut Topala Physics and Biophysics Education Research Laboratory(P&B-EduResLab) Biomedical Science DepartmentFaculty of Medical Bioengineering‘Grigore T.Popa’University of Medicine and Pharmacy IasiM.Kogalniceanu 9-13Iasi 700454Romania Faculty of Medical Bioengineering ‘Grigore T.Popa’University of Medicine and Pharmacy IasiM.Kogalniceanu 9-13Iasi 700454Romania Cytoviva Inc.570 Devall Drive Suite 301Auburn 36832ALUSA Integrated Center of Environmental Science Studies in the North-Eastern Development Region(CERNESIM) Department of Exact and Natural SciencesInstitute of Interdisciplinary Research‘Alexandru Ioan Cuza’University of IasiBlvd.Carol I no.11Iasi 700506Romania Research Center on Advanced Materials and Technologies(RAMTECH) Department of Exact and Natural SciencesInstitute of Interdisciplinary Research‘Alexandru Ioan Cuza’University of IasiBlvd.Carol I no.11Iasi 700506Romania Iasi Plasma Advanced Research Center(IPARC) Faculty of Physics‘Alexandru Ioan Cuza’University of IasiBlvd.Carol I no.11Iasi 700506Romania

Plasma treatment is necessary to optimize the performance of biomaterial *** enhances and regulates the performance of biomaterial su rfaces,creating an effective interface with the human *** treatments have the ability to modify the chemical com position and physical structu re of a surface while leaving its properties *** possess the ability to modify material su rfaces,eliminate contaminants,conduct investigations on cancer therapy,and facilitate wound *** subject of study in question involves the integration of plasma science and technology with biology and *** a helium plasma jet source,applying up to 18 kV,with an average power of 10 W,polymer foils were treated for 60 *** treatment has the ability to alter the chemical composition and physical structure of a su rface while maintaining its *** investigation involved the application of helium plasma at atmospheric pressure to polyamide 6 and polyethylene terephthalate *** inquiry involves monitoring and assessing the plasma source and polymer materials,as well as analyzing the impacts of plasma *** the mean power of the discharge aids in assessing the economic efficacy of the plasma *** discharge in helium at atmospheric pressure has beneficial effects in technology,where it increases the surface free energy of polymer *** biomedicine,it is used to investigate cytotoxicity and cell survival,particularly in direct blood exposure situations that can expedite *** the specific parameters that influence the plasma source in the desired manner for the intended application is of utmost im portance.

关键词： Atmopheric pressure plasmas Plasma-polymer interaction Plasma Medicine Plasma diagnosis Polymer characterization

A Statistical Study of Magnetic Flux Emergence in Solar Active Regions Prior to Strongest Flares

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Research in Astronomy and Astrophysics 2024年第4期24卷 147-160页

作者： Alexander S.Kutsenko Valentina I.Abramenko andrei A.Plotnikov Crimean Astrophysical Observatory p/o NauchnyCrimea298409Russia

Using the data on magnetic field maps and continuum intensity for Solar Cycles 23 and 24,we explored 100 active regions(ARs)that produced M5.0 or stronger *** focus on the presence/absence of the emergence of magnetic flux in these ARs 2-3 days before the strong flare *** found that 29 ARs in the sample emerged monotonically amidst quiet-Sun.A major emergence of a new magnetic flux within a pre-existing AR yielding the formation of a complex flare-productive configuration was observed in another 24 *** 30 ARs,an insignificant(in terms of the total magnetic flux of pre-existing AR)emergence of a new magnetic flux within the pre-existing magnetic configuration was observed;for some of them the emergence resulted in a formation of a configuration with a small δ-sunspot;11 out of 100 ARs exhibited no signatures of magnetic flux emergence during the entire interval of *** six cases the emergence was in progress when the AR appeared on the Eastern limb,so that the classification and timing of emergence were not *** conclude that the recent flux emergence is not a necessary and/or sufficient condition for strong flaring of an *** flux emergence rate of flare-productive ARs analyzed here was compared with that of flare-quiet ARs analyzed in our previous *** revealed that the flare-productive ARs tend to display faster emergence than the flare-quiet ones do.

关键词： Sun:activity Sun:flares Sun:magnetic fields

High-speed performance self-powered short wave ultraviolet radiation detectors based onκ(ε)-Ga_(2)O_(3)

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Journal of Semiconductors 2024年第4期45卷 56-62页

作者： Aleksei Almaev Alexander Tsymbalov Bogdan Kushnarev Vladimir Nikolaev Alexei Pechnikov Mikhail Scheglov andrei Chikiryaka Petr Korusenko Research and Development Center for Advanced Technologies in Microelectronics National Research Tomsk State UniversityTomsk 634050Russia Fokon LLC Kaluga 248035Russia Department of Semiconductor Electronics and Physics of Semiconductors National University of Science and Technology MISISMoscow 119049Russia Perfect Crystals LLC Saint Petersburg 194223Russia Department of Solid-State Electronics Saint Petersburg State UniversitySaint Petersburg 199034Russia Department of Physics Omsk State Technical UniversityOmsk 644050Russia

High-speed solar-blind short wavelength ultraviolet radiation detectors based onκ(ε)-Ga_(2)O_(3)layers with Pt contacts were demonstrated and their properties were studied in ***κ(ε)-Ga_(2)O_(3)layers were deposited by the halide vapor phase epitaxy on patterned GaN templates with sapphire *** spectral dependencies of the photoelectric properties of struc-tures were analyzed in the wavelength interval 200-370 *** maximum photo to dark current ratio,responsivity,detectiv-ity and external quantum efficiency of structures were determined as:180.86 ***.,3.57 A/W,1.78×10^(12) Hz^(0.5)∙cm·W^(-1) and 2193.6%,respectively,at a wavelength of 200 nm and an applied voltage of 1 *** enhancement of the photoresponse was caused by the decrease in the Schottky barrier at the Pt/κ(ε)-Ga_(2)O_(3)interface under ultraviolet *** detectors demon-strated could functionalize in self-powered mode due to built-in electric field at the Pt/κ(ε)-Ga_(2)O_(3)*** responsivity and external quantum efficiency of the structures at a wavelength of 254 nm and zero applied voltage were 0.9 mA/W and 0.46%,*** rise and decay times in self-powered mode did not exceed 100 ms.

关键词： κ(ε)-gallium oxide solar-blind shortwave ultraviolet radiation detectors self-powered operation mode

Refinement of Adaptive Dynamical Simulation of Quantum Mechanical Double Slit Interference Phenomenon

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Journal of Modern Physics 2024年第3期15卷 239-249页

作者： Tadashi Ando andrei Khrennikov Ichiro Yamato Department of Applied Electronics Tokyo University of Science Tokyo Japan International Center for Mathematical Modelling in Physics and Cognitive Sciences Linnaeus University V&aumlxj&oum Sweden Department of Biological Science and Technology Tokyo University of Science Tokyo Japan

We applied adaptive dynamics to double slit interference phenomenon using particle model and obtained partial successful results in our previous report. The patterns qualitatively corresponded well with experiments. Several properties such as concave single slit pattern and large influence of slight displacement of the emission position were different from the experimental results. In this study we tried other slit conditions and obtained consistent patterns with experiments. We do not claim that the adaptive dynamics is the principle of quantum mechanics, but the present results support the probability of adaptive dynamics as the candidate of the basis of quantum mechanics. We discuss the advantages of the adaptive dynamical view for foundations of quantum mechanics.

关键词： Double Slit Interference Adaptive Dynamics Quantum Mechanics Particle Model Simulation

Self-powered UVC detectors based on α-Ga_(2)O_(3) with enchanted speed performance

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Journal of Semiconductors 2024年第8期45卷 74-80页

作者： Aleksei Almaev Alexander Tsymbalov Bogdan Kushnarev Vladimir Nikolaev Alexei Pechnikov Mikhail Scheglov andrei Chikiryaka Laboratory of Metal Oxide Semiconductors Research and Development Center for Advanced Technologies in MicroelectronicsNational Research Tomsk State UniversityTomsk 634050Russia Fokon LLC Kaluga 248035Russia Department of Semiconductor Electronics and Physics of Semiconductors National University of Science and Technology MISISMoscow 119049Russia Perfect Crystals LLC Saint Petersburg 194223Russia

Detectors were developed for detecting irradiation in the short-wavelength ultraviolet(UVC)interval using high-quality single-crystallineα-Ga_(2)O_(3) films with Pt interdigital *** films ofα-Ga_(2)O_(3) were grown on planar sapphire substrates with c-plane orientation using halide vapor phase *** spectral dependencies of the photo to dark current ratio,responsivity,external quantum efficiency and detectivity of the structures were investigated in the wavelength interval of 200−370 *** maximum of photo to dark current ratio,responsivity,external quantum efficiency,and detectivity of the structures were 1.16×10^(4) ***.,30.6 A/W,1.65×10^(4)%,and 6.95×10^(15) Hz^(0.5)·cm/W at a wavelength of 230 nm and an applied voltage of 1 *** high values of photoelectric properties were due to the internal enhancement of the photoresponse associated with strong hole ***α-Ga_(2)O_(3) film-based UVC detectors can function in self-powered operation mode due to the built-in electric field at the Pt/α-Ga_(2)O_(3) *** a wavelength of 254 nm and zero applied voltage,the structures exhibit a responsivity of 0.13 mA/W and an external quantum efficiency of 6.2×10^(−2)%.The UVC detectors based on theα-Ga_(2)O_(3) films demonstrate high-speed performance with a rise time of 18 ms in self-powered mode.

关键词： HVPE gallium oxide solar-blind ultraviolet detector self-powered mode

Design of Biologically Active Macromolecular Ligands and Their Luminescent Complexes with Terbium Ions

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Chinese Journal of Polymer Science 2024年第5期42卷 604-611,I0007页

作者： Tatiana N.Nekrasova andrei I.Fischer Natalia A.Nesterova Anatoliy V.Dobrodumov Anzhelika V.Garshinina Olga D.Shuvaeva Natalya V.Zakharova Evgenii F.Panarin Institute of Macromolecular Compounds Russian Academy of Sciences31 Bolshoy pr.St Petersburg199004Russia Smorodintsev Research Institute of Influenza Russian Ministry of Health15/17 ul.prof.PopovaSt Petersburg197376Russia

Water-soluble copolymers of p-methacrylamidobenzoic acid(MABA)with neutral comonomers(N-vinylpyrrolidone(VP),N-methyl-N-vinylacetamide(MVAA),N-methacryloyl glucosamine(MAG))and anionic comononer sodium styrene sulfonate(NaSS)were synthesized by radical *** interactions between the prepared copolymers and Tb^(3+)ions in aqueous solutions were studied;the significant influence of chemical structure of a comonomer on luminescence intensity of Tb^(3+)complexes with the copolymers was *** luminescence intensity of Tb^(3+)complexes with the copolymers containing N-vinylamide units(VP,MVAA)is three times more intense than that observed for the complexes between Tb^(3+)and MAG-containing *** the case of NaSS-containing copolymers,the luminescence intensity is controlled by the values of binding constants between Tb^(3+)and MABA and the content of MABA units in a *** studied copolymers and their complexes with Tb^(3+)have low cytotoxicity and a pronounced antiviral activity against human respiratory syncytial virus.

关键词： Luminescence Water-soluble copolymers Lanthanide complexes Antiviral activity Cytotoxicity