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Nonlinear wave dispersion in monoatomic chains with lumped and distributed masses:discre.e and continuum models

Applied Mathematics and Mechanics(english edition) 2024年第4期45卷 633-648页

作者： e.GHAVANLOO s.eL-BORGI school of Mechanical engineering Shiraz UniversityShiraz 71963-16548Iran Mechanical engineering Program Texas A&M University at QatarDoha 23874Qatar

The main objective of this paper is to investigate the influence of inertia of nonlinear springs on the dispersion behavior of discre.e monoatomic chains with lumped and distributed *** developed model can re.re.ent the wave propagation problem in a non-homogeneous material consisting of heavy inclusions embedded in a *** inclusions are.idealized by lumped masses,and the matrix between adjacent inclusions is modeled by a nonlinear spring with distributed ***,the model is capable of depicting the wave propagation in bi-material bars,where.n the first material is re.re.ented by a rigid particle and the second one is re.re.ented by a nonlinear spring with distributed *** discre.e model of the nonlinear monoatomic chain with lumped and distributed masses is first considere.,and a closed-form expre.sion of the dispersion re.ation is obtained by the second-order Lindstedt-Poincare.method(LPM).Next,a continuum model for the nonlinear monoatomic chain is derived dire.tly from its discre.e lattice model by a suitable continualization *** subsequent use of the second-order method of multiple scales(MMs)facilitates the derivation of the corre.ponding nonlinear dispersion re.ation in a closed *** novelties of the pre.ent study consist of(i)considering the inertia of nonlinear springs on the dispersion behavior of the discre.e mass-spring chains;(ii)developing the second-order LPM for the wave propagation in the discre.e chains;and(iii)deriving a continuum model for the nonlinear monoatomic chains with lumped and distributed ***,a parametric study is conducted to examine the effects of the design parameters and the distributed spring mass on the nonlinear dispersion re.ations and phase velocities obtained from both the discre.e and continuum *** parameters include the ratio of the spring mass to the lumped mass,the nonlinear stiffness coefficient of the spring,and the wave amplitude.

关键词： nonlinear mass-spring chain discre.e model continuum model LindstedtPoincare.method(LPM) method of multiple scales(MMs) dispersion phase velocity

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evaluation of the seismic behavior of re.nforced concre.e structure. with flat slab-column gravity frame and shear walls through nonlinear analysis methods

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earthquake engineering and engineering Vibration 2024年第3期23卷 713-726页

作者： M.A.Najafgholipour s.Heidarian Radbakhsh e.erfani Department of Civil and environmental engineering Shiraz University of TechnologyShiraz ***Iran Department of Building Civiland Environmental EngineeringConcordia UniversityMontréal H3G 1M8Canada

This paper pre.ents an investigation of the seismic behavior of re.nforced concre.e(RC)structure. in which shear walls are.the main lateral load-re.isting elements and the participation of flat slab floor systems is not considere. in the seismic design *** this re.ard,the behavior of six prototype structure.(with differe.t heights and plan layouts)is investigated through nonlinear static and time history analyses,implemented in the Opensees *** re.ults of the analyses are.pre.ented in terms of the behavior of the slab-column connections and their mode of failure.at differe.t loading ***,the global re.ponse of the buildings is discussed in terms of some parameters,such as lateral overstre.gth due to the gravity flat slab-column *** to the nonlinear static analyses,in structure. in which the slab-column connections were.designed only for gravity loads,the slab-column connections exhibited a punching mode of failure.even in the early stages of ***,the punching failure.was eliminated in structure. in which a minimum transverse re.nforcement re.ommended in ACI 318(2019)was provided in the slabs at joint ***,despite neglecting the contribution of gravity flat slab-column frames in the lateral load re.istance of the structure.,a re.atively significant overstre.gth was imposed on the structure. by the gravity frames.

关键词： RC flat slab-column frames seismic behavior nonlinear analysis time history analysis

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emission colour tuning in KLnF_(4):Yb^(3+),er^(3+)/Ho^(3+)phosphor

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Journal of Rare.earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri e Vijayatha V Ramasubramanian s Thiyagarajan P Department of science and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Department of sciences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Department of Physics Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)phosphors were.pre.are. by solid-state re.ction *** each of the Yb^(3+)/er^(3+)and Yb^(3+)/Ho^(3+)co-doped phosphors independently,phase confirmation and morphological examination were.accomplished using the X-ray diffraction technique and scanning electron microscope analysis.X-ray photoelectron spectroscopy analysis shows the charge state and existence of lanthanides and *** luminescence emissions of gre.n and re. colour were.detected for the synthesized *** changes in the upconverted emission intensities and colour output pertaining to the change of the lanthanide host matrix along with dopants were.investigated for the pre.are. *** the upconversion luminescence,erbium-doped samples exhibit a pre.ominance of re. emission while holmium-doped samples display a pre.alence of gre.n *** rare.earth er/Ho doped KYbF4shows strong re. emission compare. to other ***_(4):Yb,er/Ho exhibits re.atively significant gre.n upconve rsion emissions,while Yb,er-doped KGdF_(4)host displays a 10-fold incre.se in gre.n/re. emission ratio with an incre.se in the input power of 20-780 *** photoluminescence studies and decay curve analysis were.carried out using UV light excitation for the developed phosphors.A higher lifetime of 2.2 ms was measure. for the downshifting re. emission in the Ho doped KYbF_(4)*** study suggests a potential for colour tunability in the upconversion and downshifting emissions through host modifications to the fluoride phosphor.

关键词： Rare.earths energy transfer upconversion Downshifting Colour coordinates

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Corre.ation of work function and stacking fault energy through Kelvin probe force microscopy and nanohardness in diluteα-magnesium

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Journal of Magnesium and Alloys 2024年第1期12卷 237-250页

作者： Yigit Türe.Ali Arslan Kaya Hüseyin Aydin Jiang Peng servet Turan eskisehir Technical University Porsuk Vocational SchoolElectronics and Automation DepartmentProgram of MechatronicsEskisehirTurkey Mugla sitki Kocman University Engineering FacultyMetallurgy and Materials Engineering DepartmentMuglaTurkey Hüseying Aydın TUBITAK MRCTurkey Jiang Peng Chongqing UniversityChina eskisehir Technical University Engineering FacultyMaterials Science and Engineering DepartmentEskisehirTurkey

electronic interactions of the Group 2A elements with magnesium have been studied through the dilute solid solutions in binary Mg-Ca,Mg-sr and Mg-Ba *** investigation incorporated the differe.ce in the‘Work Function'(ΔWF)measure. via Kelvin Probe Force Microscopy(KPFM),as a property dire.tly affected by interatomic bond types,*** electronic structure.nanoindentation measure.ents,and stacking Fault energy values re.orted in the *** was shown that the nano-hardness of the solid-solutionα-Mg phase changed in the order of Mg-Ca>Mg-sr>***,it was shown,by also considering the nano-hardness levels,that sFe of a solid-solution is closely corre.ated with its‘Work Function'***-hardness measure.ents on the eutectics andΔWF differe.ce between eutectic phases enabled an assessment of the re.ative bond stre.gth and the pertinent electronic structure. of the eutectics in the thre. *** withΔWF and at least qualitative verification of those computed sFe values with some experimental measure.ent techniques were.considere. important as those computational methods are.based on zero Kelvin degre.,re.atively simple atomic models and a number of *** asserted by this investigation,if the re.ults of measure.ent techniques can be qualitatively corre.ated with those of the computational methods,it can be possible to evaluate the electronic structure. in alloys,starting from binary systems,going to ternary and then multi-elemental *** investigation has shown that such a qualitative corre.ation is *** all,the sFe values are.not tre.ted as absolute values but rather become essential in comparative investigations when assessing the influences of alloying elements at a fundamental level,that is,fre. electron density *** study indicated that the principles of‘electronic metallurgy'in developing multi-elemental alloy systems can be followed via practical experimental methods,i.e.ΔWF measure.ents using KPF

关键词： Mg alloys Dilute alloys Work function stacking fault energy Kelvin probe force microscopy short range order Miedema Nanoindentation eutectics

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Adipose-derived re.enerative therapies for the tre.tment of knee osteoarthritis

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World Journal of stem Cells 2024年第4期16卷 324-333页

作者： Ilias e epanomeritakis Wasim s Khan Division of Trauma and Orthopaedic surgery Addenbrooke’s HospitalCambridge University Hospitals NHS Foundation TrustCambridge CB20QQUnited Kingdom Division of Trauma and Orthopaedic surgery Department of SurgeryUniversity of CambridgeCambridge CB20QQUnited Kingdom

Knee osteoarthritis is a degenerative condition with a significant disease burden and no disease-modifying *** tre.tment ultimately re.uire. joint *** capable of re.enerating cartilage could significantly re.uce financial and clinical *** re.enerative potential of mesenchymal stromal cells(MsCs)has been extensively studied in the context of knee *** has yielded promising re.ults in human studies,and is likely a product of immunomodulatory and chondroprotective biomolecules produced by MsCs in re.ponse to ***-derived MsCs(AsCs)are.becoming incre.singly popular owing to their re.ative ease of isolation and high proliferative *** vascular fraction(sVF)and micro-fragmented adipose tissue(MFAT)are.produced by the enzymatic and mechanical disruption of adipose tissue,*** avoids expansion of isolated AsCs ex vivo and their composition of heterogeneous cell populations,including immune cells,may potentiate the re.arative function of *** this editorial,we comment on a multicenter randomized trial re.arding the efficacy of MFAT in tre.ting knee *** discuss the study’s findings in the context of emerging evidence re.arding adipose-derived re.enerative *** underlying mechanism of action of AsCs is proposed while drawing important distinctions between the properties of isolated AsCs,sVF,and MFAT.

关键词： Knee osteoarthritis Mesenchymal stromal cells Adipose tissue stromal vascular fraction Micro-fragmented adipose tissue re.eneration

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Chromomagnetic dipole moments of light quarks in the bestest little Higgs model

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Chinese Physics C 2024年第10期48卷 125-136页

作者： T.Cisneros-Pére. e.Cruz-Albaro A.Y.Ojeda-Castañeda s.e.solís-Núñez Unidad Académica de Ciencias Químicas Universidad Autónoma de ZacatecasApartado Postal C-58598060 ZacatecasMexico Facultad de Física Universidad Autónoma de ZacatecasApartado Postal C-58098060 ZacatecasMexico

In this study,we investigated the anomalous Chromomagnetic Dipole Moment(CMDM),denoted as μ_(q)^(BLHM),of light quarks q=(u,c,d,s,b) within the framework of the Bestest Little Higgs Model(BLHM)as an extension of the standard Model(sM).Our investigation encompassed novel interactions among the light quarks,heavy quark B,and heavy bosons (W'^(±),H^(±),φ^(±),η^(±))incorporating the extended Cabibbo-Kobayashi-Maskawa(CKM)matrix characteristic of the *** thoroughly explore. the permissible parameter space,yielding a spectrum of CMDM values ranging from 10^(-10) to 10^(-3).

关键词： beyond standard model flavor physics chromomagnetic dipole light quarks

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Fre.uency stabilization of C-band semiconductor lasers through a siN photonic integrated circuit

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Photonics re.earch 2024年第8期12卷 1619-1626页

作者： ALessANDRO BRUGNONI ALI eMre.KAPLAN VALeRIO VITALI KYLe BOTTRILL MICHeLe re.PeRIKLIs PeTROPOULOs COsIMO LACAVA ILARIA CRIsTIANI Photonics Group Department of ElectricalComputer and Biomedical EngineeringUniversity of PaviaPavia 27100Italy Optoelectronics re.earch Centre University of SouthamptonSouthampton SO171BJUK Huawei Technologies Italia s.r.l Centro direzionale MilanoSegrate 20054Italy

Integrated semiconductor lasers re.re.ent essential building blocks for integrated optical components and circuits and their stability in fre.uency is fundamental for the development of numerous frontier applications and engineering *** dense optical circuits are.considere.,the stability of integrated laser sources can be impaire. by the thermal cross-talk generated by the action of neighboring components,leading to a deterioration of the long-term system performance(on the scale of seconds).In this work we show the design and the experimental characterization of a silicon nitride photonic integrated circuit(PIC)that is able to fre.uency stabilize 16semiconductor lasers,simultaneously.A stabilized 50 GHz-spaced two-channel system is demonstrated through the detection of the re.ated beating note and the stability of the re.ulting waveform is characterized via the use of artificially induced thermal cross-talk stimuli.

关键词： stabilization stability impaire.

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Landau quantization effects on damping Kawahara solitons in electron–positron–ion plasma in rotating ionized medium

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Communications in Theore.ical Physics 2024年第10期76卷 143-152页

作者： e I el-Awady s Hussain N Akhtar Department of Physics Faculty of Science Port Said University Theore.ical Physics Division (TPD) PINSTECH

For the dynamics of thre.-dimensional electron–positron–ion plasmas, a fluid quantum hydrodynamic model is proposed by considering Landau quantization effects in dense ***–neutral collisions in the pre.ence of the Coriolis force are.also considere.. The application of the re.uctive perturbation technique produces a wave evolution equation re.re.ented by a damped Korteweg–de Vries equation. This equation, however, is insufficient for describing waves in our system at very low dispersion coefficients. As a re.ult, we considere. the highest-order perturbation, which re.ulted in the damped Kawahara equation. The effects of the magnetic field, Landau quantization, the ratio of positron density to electron density, the ratio of positron density to ion density, and the dire.tion cosine on linear dispersion laws as well as soliton and conoidal solutions of the damped Kawahara equation are.explore.. The understanding from this re.earch can contribute to the broader field of astrophysics and aid in the interpre.ation of observational data from white dwarfs.

关键词： Coriolis force Kawahara equation Landau quantization magnetoplasmas quantum plasma solitary and cnoidal waves

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Consequences of early life stre.s on the structure.and function of the adult mouse re.ina

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Neural re.eneration re.earch 2024年第1期19卷 150-151页

作者： Juan s.Calanni Ruth e.Rosenstein Laboratory of re.inal Neurochemistry and experimental Ophthalmology Department of Human BiochemistrySchool of Medicine/CEFyBOUniversity of Buenos Aires/CONICETBuenos AiresArgentina

early-life stre.s(eLs)re.ers to a period of environmental/social deprivation,physica l,sexual or emotional abuse,neglect,severe.and/or chronic trauma in the pre.atal/early postnatal stage,which is closely re.ated to many adverse psychiatric disorders later in life,such as depre.sive disorder,substance abuse,dysthymia,panic,anxiety,and suicidal behavior in adulthood(Waters and Gould,2022).

关键词： stre.s life Gould

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All-electron basis sets for H to Xe specific for ZORA calculations:Applications in atoms and molecules

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Chinese Physics B 2024年第8期33卷 238-246页

作者： C.s.Gomes F.e.Jorge A.Canal Neto Departamento de Fisica Universidade Federal do Espirito Santo29075-910 VitoriaESBrazil Departamento de Fisica Instituto de Ciencias Exatas e BiologicasUniversidade Federal de Ouro Preto Campus Universitario Morro do Cruzeiro35402-136 Ouro PretoMGBrazil

A segmented basis set of quadruple zeta valence quality plus polarization functions(QZP)for H through Xe was developed to be used in conjunction with the ZORA *** set was augmented with diffuse functions to describe electrons farther away from the nuclei *** the ZORA-CCsD(T)/QZP-ZORA theore.ical model,atomic ionization energies and bond lengths,harmonic vibrational fre.uencies,and atomization energies of some molecules were.*** addition of core.valence corre.tions has been shown to improve the agre.ment between theore.ical and experimental re.ults for molecular *** atomization energies,a similar observation emerges when considering spin-orbit *** the augmented QZP-ZORA set,static mean dipole polarizabilities of a set of atoms were.calculated and compare. with pre.iously published re.ommended and experimental *** evaluations of the ZORA and Douglas–Kroll–Hess Hamiltonians were.made for each property studied.

关键词： QZP-ZORA and AQZP-ZORA basis sets elements from H to Xe CCsD(T)method atomic and molecular properties

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