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Communications in Theoretical Physics 2022年第2期74卷 9-18页

作者： B J gireesha B nagaraja n Srikantha n g Rudraswamy A Felicita Department of Studies and Research in Mathematics Kuvempu UniversityShankaraghattaShivamoggaKarnatakaIndia Department of Mathematics MS Ramaiah Institute of TechnologyBangaloreIndia Department of Mathematics P.C.Jabin Science College(Autonomous)HubballiIndia

This examination emphasizes the analysis of thermal transmission of Carreau fluid flow on a permeable sensor surface equipped with radiation,Joule heating,an internal heat source,and a magnetic *** the above effects and assumptions,the equations that administer the flow are formulated.A configured system of equations is productively reduced to a system of ordinary differential *** reduced system is then dealt with using the Runge–Kutta-Fehlberg fourth–fifth order tool equipped by the shooting *** numerical solutions are utilized to plot graphs and *** conclusion of the study outlines some important findings such as the power law index,the thermal radiation parameter and the heat source parameter enhance the thermal panel whereas the Weissenberg number deescalates the *** power law index and permeable velocity decrease the velocity panel *** representation of streamlines of the flow has been given to strengthen the study.A detailed description has been produced about the results obtained in the study.

关键词： sensor surface Carreau fluid squeezed flow thermal radiation heat generation

Calculation of the gluon Distribution Function Using Alternative Method for the Proton Structure Function

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Communications in Theoretical Physics 2003年第5X期40卷 551-557页

作者： n.ghahramany g.R.Boroun PhysicsDepartment ShirazUniversityShiraz71454Iran

A calculation of the proton structure function F2(x,Q^2) is reported with an approximation method that relates the reduced cross section derivative and the F2(x, Q^2) scaling violation at low x by using quadratic form for the structure function. This quadratic form approximation method can be used to determine the structure function F2 (x, Q^2) from the HERA reduced cross section data taken at low x. This new approach can determine the structure functions F2(x,Q^2) with reasonable precision even for low x values which have not been investigated. We observe that the Q^2 dependence is quadratic over the full kinematic covered range. To test the validity of our new determined structure functions, we find the gluon distribution function in the leading order approximation with our new calculation for the structure functions and compare them with the QCD parton distribution functions.

关键词：质子结构函数胶子量子色动力学无弹性散射 QCD 强相互作用

DIFFUSIVE-DISPERSIVE TRAVELIng WAVES AnD KInETIC RELATIOnS IV. COMPRESSIBLE EULER EQUATIOnS

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Chinese Annals of Mathematics,Series B 2003年第1期24卷 17-34页

作者： n. BEDJAOUI P.g.LEFLOCH Centre de Mathematiques Appliquees & Centre national de la Recherche Scientifique UMR 7641 Ecole Polytechnique 91128 Palaiseau Cedex France. INSSET Universite de Picardie 48 rue Raspail 02109 Saint-Quentin France.Centre de Mathematiques Appliquees & Centre National de la Recherche Scientifique UMR 7641 Ecole Polytechnique 91128 Palaiseau Cedex France.

The authors consider the Euler equations for a compressible fluid in one space dimensionwhen the equation of state of the fluid does not fulfill standard convexity assumptions andviscosity and capillarity effects are taken into account. A typical example of nonconvex con-stitutive equation for fluids is Van der Waals' equation. The first order terms of these partialdifferential equations form a nonlinear system of mixed (hyperbolic-elliptic) type. For a class ofnonconvex equations of state, an existence theorem of traveling waves solutions with arbitrarylarge amplitude is established here. The authors distinguish between classical (compressive) andnonclassical (undercompressive) traveling waves. The latter do not fulfill Lax shock inequali-ties, and are characterized by the so-called kinetic relation, whose properties are investigatedin this paper.

关键词： Elasto dynamics Phase transitions Hyperbolic conservation law Diffusion Dispersion Shock wave Undercompressive Entropy inequality Kinetic relation

Dendritic spine degeneration:a primary mechanism in the aging process

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neural Regeneration Research 2025年第6期20卷 1696-1698页

作者： gonzalo Flores Leonardo Aguilar-Hernández Fernado garcía-Dolores Humberto nicolini Andrea Judith Vázquez-Hernández Hiram Tendilla-Beltrán Instituto de Fisiología Benemérita Universidad Autónoma de Puebla(BUAP)PueblaMexico Instituto de Ciencias Forenses(InCIFO) Tribunal Superior de Justicia de la Ciudad de México(TSJCDMX).Mexico CityMexico Instituto nacional de Medicina genómica(InMEgEn) Mexico CityMexico

Recent reports suggest that aging is not solely a physiological process in living beings;instead, it should be considered a pathological process or disease(Amorim et al., 2022). Consequently, this process involves a wide range of factors, spanning from genetic to environmental factors, and even includes the gut microbiome(gM)(Mayer et al., 2022). All these processes coincide at some point in the inflammatory process, oxidative stress, and apoptosis, at different degrees in various organs and systems that constitute a living organism(Mayer et al., 2022;AguilarHernández et al., 2023).

关键词： aging process stress

Modulational Instability of Optical Vortices in Engineered Saturable Media

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Engineering 2022年第10期17卷 31-43页

作者： D.g.Pires n.M.Litchinitser Department of Electrical and Computer Engineering Duke UniversityDurhamNC 27708USA

Propagation of light beams in turbid media such as underwater environments,fog,clouds,or biological tissues finds increasingly important applications in science and technology,including bio-imaging,underwater communication,and free-space communication *** many of these applications traditionally relied on conventional,linearly polarized gaussian beams,light possesses many degrees of freedom that are still largely unexplored,such as spin angular momentum(SAM)and orbital angular momentum(OAM).Here,we present nonlinear light-matter interactions of such complex light beams with"rotational"degrees of freedom in engineered nonlinear colloidal *** making use of both variational and perturbative approach,we consider non-cylindrical optical vortices,elliptical optical vortices,and higher-order Bessel beams integrated in time(HOBBIT)to predict the dynamics and stability of the evolution of these *** results may find applications in many scenarios involving light transmission in strongly scattering environments.

关键词： Optical vortex Orbital angular momentum Modulation instability Turbid media

Efficient dye-sensitized solar cells from mesoporous zinc oxide nanostructures sensitized by n719 dye

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Journal of Semiconductors 2018年第3期39卷 25-30页

作者： g.R.A.Kumara U.Deshapriya C.S.K.Ranasinghe E.n.Jayaweera R.M.g.Rajapakse national Institute of Fundamental Studies Hantana RoadKandy20000Sri Lanka Postgraduate Institute of Science University of PeradeniyaPeradeniya20400Sri Lanka Derpatment of Chemistry Faculty of ScienceUniversity of PeradeniyaPeradeniya20400Sri Lanka

Dye-sensitized solar cells（DSCs） have attracted a great deal of attention due to their low-cost and high power conversion efficiencies. They usually utilize an interconnected nanoparticle layer of TiO2 as the electron transport medium. From the fundamental point of view, faster mobility of electrons in Zn O is expected to contribute to better performance in DSCs than TiO2, though the actual practical situation is quite the opposite. In this research, we addressed this problem by first applying a dense layer of Zn O on FTO followed by a mesoporous layer of interconnected Zn O nanoparticle layer, both were prepared by spray pyrolysis technique. The best cell shows a power conversion efficiency of 5.2% when the mesoporous layer thickness is 14 μm and the concentration of the n719 dye in dye coating solution is 0.3 m M, while a cell without a dense layer shows 4.2% under identical conditions. The surface concentration of dye adsorbed in the cell with a dense layer and that without a dense layer are5.00 × 10^（-7） and 3.34 × 10^（-7） mol/cm^2, respectively. The cell with the dense layer has an electron lifetime of-54.81 ms whereas that without the dense layer is 11.08 ms. As such, the presence of the dense layer improves DSC characteristics of Zn O-based DSCs.

关键词： dye-sensitized solar cell mesoporous ZnO layer ZnO dense layer DSC characteristics

numerical Analysis of the Tip Leakage Flow Field in a Transonic Axial Compressor with Circumferential Casing Treatment

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Journal of Thermal Science 2010年第3期19卷 198-205页

作者： g.Legras n.gourdain I.Trebinjac LMFA-UMR CnRS 5509 Ecole Centrale de Lyon /Université Lyon 1 /INSA69134EcullyFrance CERFACS Computational Fluid Dynamics Team31057ToulouseFrance

This paper reports on numerical investigations aimed at understanding the influence of circumferential casing grooves on the tip leakage flow and its resulting vortical *** results and conclusions are based on steady state 3D numerical simulations of the well-known transonic axial compressor nASA Rotor 37 near stall operating *** calculations carried out on the casing treatment configuration reveal an important modification of the vortex topology at the rotor tip *** grooves limit the expansion of the tip leakage vortex in the direction perpendicular to the blade chord,but generate a set of secondary tip leakage vortices due to the interaction with the leakage mass ***,a deeper investigation of the tip leakage flow is proposed.

关键词： transonic axial compressor casing treatment circumferential groove tip leakage vortex

nUCLEAR MAgnETIC RESOnAnCE STUDIES OF METAL COMPLEXES WITH ETHYLEnEDIAMInE-n,n′-DIACETATE-n,n′-DI-β-PROPIOnATE

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Journal of Rare Earths 1990年第4期8卷 246-251页

作者：牛春吉 E.n.Rizkalla g.R.Choppin Changchun Institute of Applled Chemistry Academia SinicaChangchun 130022China Department of Chemistry the Florida State University

The complexes of metals(Mg,Ca,Sr,Ba,La,Y and Lu)with ethylenediamine-n,n′-diacetate-n, n′-di-β-propionate have been studied by proton nuclear magnetic resonance(PMR).The interesting quartet spectral pattern of acetate protons and multiplet spectral pattern of protons of propionate groups for the complexes of metal ions of high charge density have been *** results show that the chemical bond for these complexes is predominantly ionic and the lability of metal-nitrogen bond as well as metal- oxygen bond decreases with increasing charge density of cations.

关键词： Pro PROPIOnATE DI DIACETATE-n,n nUCLEAR MAgnETIC RESOnAnCE STUDIES OF METAL COMPLEXES WITH ETHYLEnEDIAMInE-n,n

3D tomographic analysis of equatorial plasma bubble using gnSS-TEC data from Indonesian gnSS network

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Earth and Planetary Physics 2025年第1期9卷 127-136页

作者： Ihsan naufal Muafiry Prayitno Abadi Teguh n.Pratama Dyah R.Martiningrum Sri Ekawati Yuandhika gWismaya Febrylian FChabibi gatot HPramono Research Center for Climate and Atmosphere Indonesian National Research and Innovation Agency(BRIN)BandungIndonesia Indonesian geospatial Information Agency(BIg) JakartaIndonesia Dept.of Physics Faculty of ScienceUniversiti Teknologi MalaysiaJohor BahruMalaysia Dept.Earth Planet Sci. Hokkaido UniversitySapporoJapan School of Electrical Engineering Telkom UniversityBandungIndonesia

Equatorial Plasma Bubbles(EPBs)are ionospheric irregularities that take place near the magnetic *** most commonly occur after sunset during the equinox months,although they can also be observed during other *** phenomenon significantly disrupts radio wave signals essential to communication and navigation *** national network of global navigation Satellite System(gnSS)receivers in Indonesia(>30°longitudinal range)provides an opportunity for detailed EPB *** explore this,we conducted preliminary 3D tomography of total electron content(TEC)data captured by gnSS receivers following a geomagnetic storm on December 3,2023,when at least four EPB clusters occurred in the Southeast Asian *** and extracted TEC depletion with a 120-minute running average were then used as inputs for a 3D tomography *** 2D spatial distribution consistently captured the four EPB clusters over *** tomography results were validated through a classical checkerboard test and comparisons with other ionospheric data sources,such as the global Ionospheric Map(gIM)and International Reference Ionosphere(IRI)*** of the results demonstrates the capability of the Indonesian gnSS network to measure peak ionospheric *** findings highlight the potential for future three-dimensional research of plasma bubbles in low-latitude regions using existing gnSS networks,with extensive longitudinal coverage.

关键词： EPB Indonesian gnSS network 3D tomography

Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane

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Journal of natural gas Chemistry 2011年第6期20卷 635-638页

作者： Y.H.Taufiq-Yap S.nor Asrina g.J.Hutchings n.F.Dummer J.K.Bartley Centre of Excellence for Catalysis Science and Technology Faculty of ScienceUniversiti Putra Malaysia Department of Chemistry Faculty of ScienceUniversiti Putra Malaysia Cardiff Catalysis Institute School of ChemistryCardiff University

Te-promoted （1%） vanadium phosphate catalyst （VPDTe） was prepared via VOPO4·2H2O by calcining its precursor VOHPO4·0.5H2O in a flow of n-butane/*** catalyst has resulted a higher existence of V5＋ phase with V5＋/V4＋ ratio of *** micrographs show that Te addition altered the arrangement of the platelets from ＂rose-like＂ clusters to layer with irregular *** addition has also markedly lowered the reduction activation energies of the vanadium phosphate catalyst as revealed by TPR *** amount of active oxygen species associated with V4＋ phase of the Te promoted catalyst was significantly higher than those of the unpromoted *** observations suggest that high mobility and availability of reactive oxygen species contributed to the enhancement of n-butane conversion up to 80% at 673 K,while only 47% over unpromoted catalyst （2400 h^-1,1.7% n-butane in air）.

关键词： vanadium phosphate tellurium promoter butane oxidation