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Numerical investigation and potential tunability scheme on e^+e^- and π^+π^- stimulated pair creation from vacuum using high intensity laser beams

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High Power Laser science and Engineering 2016年第4期4卷 1-7页

作者： i.Ploumistakis s.D.Moustaizis i.Tsohantjis Technical University of Crete Laboratory of Matter Structure and Laser Physics National and Kapodistrian University of Athens Faculty of PhysicsDepartment of Nuclear and Particle Physics

Numerical estimates for electrons and mesons particle–antiparticle creation from vacuum in the presence of strong electromagnetic fields are derived, using the complete probability density relation of Popov's imaginary time method(Popov, JETP Lett. 13, 185(1971); sov. Phys. JETP 34, 709(1972); sov. Phys. JETP 35, 659(1972); Popov and Marinov, sov. J. Nucl. Phys. 16, 449(1973); JETP Lett. 18, 255(1974); sov. J. Nucl. Phys. 19, 584(1974));(Popov,Phys. Let. A 298, 83(2002)), and within the framework of an experimental setup like the E144(Burke et al., Phys. ***. 79, 1626(1997)). The existence of crossing point among pair creation efficiency curves of different photon energies and the role of odd/even multiphoton orders in the production rates are discussed. Finally a kind of tunability process between the two creation processes is discussed.

关键词： high intensity lasers multiphoton processes pair production

Biomimetic amelioration of zirconium nanoparticles on a rigid substrate over viscous slime--a physiological approach

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Applied Mathematics and Mechanics(English Edition) 2023年第9期44卷 1563-1576页

作者： s.i.ABDELsALAM A.Z.ZAHER instituto de Ciencias MatemHu DiNGticas iCMAT Madrid 28049Spain Basic science Faculty of EngineeringThe British University in EgyptAl-Shorouk CityCairo 11837Egypt Basic science Department Faculty of EngineeringShubra-Benha UniversityCairo 11884Egypt

in this article,an investigation is conducted to study the precise role of zirconium nanoparticles that exist in a slime-like fluid subject to specific *** gliding is a technique of mobility used by bacteria that lack motility components,bacteria travel on their own strength in gliding locomotion by secreting a layer of slime on the substrate.A model of an undulating sheet over a layer of slime of a Rabinowitsch fluid is investigated as a potential model of bacteria’s gliding *** the aid of long wavelength approximation,the equations governing the circulation of slime underneath the cells are established and analytically *** effects of pseudoplasticity,dilatation and non-Newtonian parameter on the behavior of zirconium concentration,speed of microorganism(bacteria),streamline patterns,and pressure rise for non-Newtonian and Newtonian fluids are *** power required for propulsion is also *** interpretation for the pertinent variables has been graphically discussed against the parameters under *** is found that with the increase in the concentration of zirconium nanoparticles,the bacterial flow is accelerated and attains its maximum near the rigid substrate wall while an opposite behavior is noticed in the rest region.

关键词： zirconium nanoparticle gliding bacterium Grashof heat transfer glider's speed Rabinowitsch fluid

Quantization of the O（N） Nonlinear sigma Model

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Communications in Theoretical Physics 2002年第5期37卷 567-570页

作者： s.i.Muslih DepartmentofPhysics Al－AzharUniversityGazaPalestine

The Hamilton-Jacobi method of quantizing singular systems is discussed. The equations of motion areobtained as total differential equations in many variables. it is shown that if the system is integrable, one can obtain thecanonical phase space coordinates and set of canonical Hamilton-Jacobi partial differential equations without any needto introduce unphysical auxiliary fields. As an example we quantize the O(2) nonlinear sigma model using two differentapproaches: the functional schrodinger method to obtain the wave functionals for the ground and the exited state andthen we quantize the same model using the canonical path integral quantization as an integration over the canonicalphase-space coordinates.

关键词：量子力学 O(N)非线性sigma模型量子化

Emerging role of A-kinase anchoring protein 5 signaling in reward circuit function

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Neural Regeneration Research 2025年第10期20卷 2913-2914页

作者： William J.Flerlage Mark L.Dell’Acqua Brian M.Cox Fereshteh s.Nugent Uniformed services University of the Health sciences Department of Pharmacology and Molecular TherapeuticsBethesdaMDUSA Department of Pharmacology University of Colorado School of MedicineAnschutz Medical CampusAuroraCOUSA

There is a strong evidence supporting the hypothesis of synaptic dysfunction as a major contributor to neural circuit and network disruption underlying emotional and mood dysregulation in psychiatric disorders(simmons et al.,2024).Diverse sets of distinct molecular signaling pathways converge on the synapse to regulate synaptogenesis,synaptic function,and synaptic plasticity in brain regions and circuits through complex interactions organized by numerous multivalent protein scaffolds,including the family of proteins known as A-kinase anchoring proteins(AKAPs).

关键词： function supporting

Latitudinal gradients in body size and sexual size dimorphism in fleas:males drive Bergmann’s pattern

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integrative Zoology 2023年第3期18卷 414-426页

作者： Boris R.KRAsNOV Elena N.sURKOVA Georgy i.sHENBROT irina s.KHOKHLOVA Mitrani Department of Desert Ecology Swiss Institute for Environmental and Energy ResearchJacob Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevMidreshet Ben-GurionIsrael French Associates institute for Agriculture and Biotechnology of Drylands Jacob Blaustein Institutes for Desert ResearchBen-Gurion University of the NegevMidreshet Ben-GurionIsrael

We tested for the effects of latitude and geographic range size(GRs)on body size,leg length,and sexual size dimorphism(ssD)across 103 species ofﬂeas,taking into account phylogenetic between-species *** the data on body size were combined for males and females,the positive correlation between body size and latitude,but not GRs,was *** the analysis was restricted to one sex only,the effect of latitude appeared to be non-signiﬁcant for females,whereas male body size increased with an increase in ***ﬁc body size variation was not associated with either the latitude or the latitudinal span of the geographic range,independently of which data subset was *** evidence of association between size-independent tibia length and latitude was found for either females,males,or both sexes *** degree of ssD decreased with a decrease in latitude but was not affected by *** conclude that macroecological patterns might be manifested differently in males and *** should be kept in mind while searching for these patterns.

关键词： Bergmann’s rule ﬂeas geographic range latitude sexual dimorphism

Vagus nerve stimulation in intracerebral hemorrhage:the need for further research

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Neural Regeneration Research 2025年第11期20卷 3213-3214页

作者： sheharyar s.Baig Ali N.Ali Arshad Majid sheffield institute for Translational Neuroscience Division of NeuroscienceThe University of SheffieldSheffieldUK

Vagus nerve stimulation(VNs)and stroke:stroke is the second leading cause of death and the third leading cause of disability worldwide(Baig et al.,2023).There have been significant paradigm shifts in the management of acute ischemic stroke through mechanical *** chronic ischemic stroke,invasive VNs paired with rehabilitation is associated with a significant increase in upper limb motor recovery and is FDA-approved(Baig et al.,2023).There are no treatments of similar efficacy in acute intracerebral hemorrhage(iCH)where several promising trials,e.g.,TiCH-2,sTOP-AUsT,and TRAiGE did not show improvements in functional outcomes(Puy et al.,2023).

关键词： stimulation acute

Continuous monitoring of residual water content in boiling water-hydrocarbon emulsions during thermomechanical dehydration

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CHiNEsE JOURNAL OF CHEMiCAL ENGiNEERiNG 2024年第12期76卷 118-123页

作者： safiulina, A. Khusnutdinov, s. Khusnutdinov, i. Goncharova, i. Kazan Natl Res Technol Univ Inst Petr Chem & Nanotechnol Kazan 420015 Russia Univ Leoben Chair Min Engn & Mineral Econ A-4820 Leoben Austria

significant waste resources are generated in the form of water-oil emulsions. These emulsions cannot be effectively destroyed on an industrial scale by traditional methods that rely on the settling of the aqueous phase, and therefore, they accumulate in large quantities. Thermomechanical dehydration, based on the evaporation of the water phase, presents a promising process for recycling such waste. However, within the framework of thermomechanical dehydration, the issue of optimizing energy costs for heating raw materials and controlling the water content in the product arises. standard methods of determining water content under the boiling conditions of highly stable water-hydrocarbon emulsions are characterized by low efficiency, as they require constant sampling and the involvement of additional equipment and personnel. Consequently, this presents a challenge in predicting and creating an automated thermomechanical dehydration process. Therefore, dynamic curves depicting changes in the water content of these emulsions, depending on the temperature of the boiling liquid, have been obtained. it is proposed to determine the rate of temperature increase (dT/dt) of the boiling emulsion for continuous, real-time monitoring of the residual water content and for recording the moment of complete dehydration. Achieving a boiling emulsion temperature of 130-170 degrees C (or higher) and/or the rate of temperature increase from 3.0 to 5.5 (or above) indicates the complete dehydration of the emulsion. The proposed method can be implemented in any industrial or laboratory-scale unit for thermomechanical dehydration without significant capital costs. it is based on the use of simple devices consisting of temperature sensors and a computing unit for determining the temperature and rate of heating. (c) 2024 The Chemical industry and Engineering society of China, and Chemical industry Press Co., Ltd. All rights are reserved, including those for text and data mining, Ai training, a

关键词： Continuous water content monitoring during thermomechanical evaporation Final dehydration temperature The rate of temperature increase Waste treatment Emulsions Process control

Comment on the paper “Hydromagnetic thin film flow of Casson fluid in non-Darcy porous medium with Joule dissipation and Navier's partial slip”

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Applied Mathematics and Mechanics(English Edition) 2018年第7期39卷 1057-1058页

作者： i.POP Department of Mathematics Babes-Bolyai University

The present comment concerns some doubtful results included in the abovepaper.

关键词： local inertia parameter magnetic parameter Eckert number

Two-Layer Non-Hydrostatic Model for Generation and Propagation of interfacial Waves

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China Ocean Engineering 2019年第1期33卷 65-72页

作者： s.R.Pudjaprasetya i.Magdalena industrial and Financial Mathematics Research Group Faculty of Mathematics and Natural SciencesInstitut Teknologi Bandung

When pycnocline thickness of ocean density is relatively small, density stratification can be well represented as a two-layer system. in this article, a depth integrated model of the two-layer fluid with constant density is considered,and a variant of the edge-based non-hydrostatic numerical scheme is formulated. The resulting scheme is very efficient since it resolves the vertical fluid depth only in two layers. Despite using just two layers, the numerical dispersion is shown to agree with the analytical dispersion curves over a wide range of kd, where k is the wave number and d the water depth. The scheme was tested by simulating an interfacial solitary wave propagating over a flat bottom, as well as over a bottom step. On a laboratory scale, the formation of an interfacial wave is simulated,which also shows the interaction of wave with a triangular bathymetry. Then, a case study using the Lombok strait topography is discussed, and the results show the development of an interfacial wave due to a strong current passing through a sill.

关键词： interfacial waves two-layer non-hydrostatic model dispersion relation