This investigation deals with the study of heat transfer analysis of fractional Maxwell fluid in a vertical circular cylinder which is initially at rest. Semi-analytical elucidations for velocity as well as temperature fields have been established by using a hybrid technique which has less time cost and mathematical calculations as compared to other techniques existing in the literature. This problem

In this paper, we construct the generalized su(1, 1) nonlinear coherent states for particular physical systems. We study the behavior of the Wigner function for coherent states built from differential operators that satisfy either a generalized Heisenberg algebra or a generalized su(1, 1) nonlinear algebra. The systems studied are the harmonic oscillator and those ones associated with Pöschl-Teller

In this article, we have presented the anisotropic stars by taking a modified polytropic equation of state ( p r = k ρ 1+1/ n − α , where k and α are constants) in the framework of the Korkina-Orlyanskii spacetime. In this study, we have discussed four different models as: (A) n = 1 (Bose–Einstein Condensate (BEC) neutron liquid), (B) n = 2, (C) n = 3/2 (Non-relativistic neutron gas, (D) n = 3 (Ultra

This article studies the dispersion relation of transverse waves in an initially stresses single-walled carbon nanotube (SWCNT) with surface irregularity using Flügge shell theory. Taking into account the effects of surface irregularity and initial stresses, propagation of transverse waves is studied and dispersion curves are plotted for optical transverse waves in several figures. The effects of surface

The Au/ n -4H-SiC (MS) type structure with (Zn-doped PVA) interfacial layer was prepared and the interfacial properties were investigated. The energy density distribution profile of the interface states ( N ss ) and their relaxation time ( τ ) and capture cross section ( σ p ) of this structure was examined by using conduction method, which include a set of capacitance-voltage ( C - V ) and conductance-voltage

Many researchers and scientists are devoting their time to scrutinize nanofluids nature and characteristics for heat transfer enhancement. The scrutiny of nanoliquids is important in the large scale thermal management systems via evaporators, advanced cooling systems, heat exchangers, micro/nano-electromechanical devices and industrial chilling applications. Nanoliquids are very momentous even in the

The dynamical properties of the invasion percolation on the square lattice are investigated with an emphasis on the geometrical properties on the growing cluster of infected sites. The exterior frontier of this cluster forms a critical loop ensemble (CLE), whose length ( l ), the radius ( r ) and also roughness ( w ) fulfill the finite-size scaling hypothesis. The dynamical fractal dimension of the

To observe the direct effect of molybdenum reinforcement on nuclear radiation shielding properties, a detailed investigation was performed with a group of bismuth borate glasses. Accordingly, glass samples with the nominal compositions (65-x)B 2 O 3 + 20Bi 2 O 3 + 15Na 2 O + xMoO 3 : x = 0, 1.5, 3, 4.5, 6 and 7.5 wt% have been synthesized by the solid state conventional method. The samples were named

The area of telecommunications has experienced a considerable growth in the last few decades due to remarkable development in the field of optical fibers. Optical solitons form the basic fabric in the area of telecommunication industry. The captivating technology of sub-pico second pulses that propagate through optical fibers is modeled with Kaup-Newell’s (KN) equation. In this paper, we introduce

In this paper, we modify the ( k , s ) fractional integral operator involving k -Mittag-Leffler function and discuss its properties. We originate a new fractional operator named ( k , s )-Prabhakar derivative and obtained some classical fractional operators as a special case of the newly proposed derivative. Some properties of the introduced operator are also part of the present work. The generalized

This study explains the transient free convection phenomenon in a vertical porous channel subject to nonlinear thermal radiation. The infinite vertical channel encloses magnetohydrodynamic (MHD) flow of an Oldroyd-B fluid. The left channel wall possesses time-dependent velocity ##IMG## [http://ej.iop.org/images/1402-4896/95/11/115211/psabbe50ieqn1.gif] {${u}_{0}g(\tilde{t})$} , while the right wall

Nonlinear structures associated with the kinetic Alfvén waves such as double layers (DLs) are investigated in a multicomponent plasma consisting of cold ions with superthermal electrons and positrons. The Sagdeev potential has been derived using two-potential theory in a low- β case. It is shown that our current consideration supports both compressive and rarefactive DLs. The effects of positron concentration

In this work, the stability, mechanical properties, mechanical anisotropy properties, electronic properties and effective mass anisotropy of C 2/ m -20 Si 1- x Ge x ( x = 0, 0.2, 0.4, 0.6, 0.8, 1) are studied through ab initio calculations. Effective mass is an important index to measure the transport properties of semiconductor. The analysis of effective mass anisotropy can provide theoretical basis

We report terahertz (THz) wave generation based on mixing of two radially polarized hollow Gaussian laser beams in periodic density plasma. We incorporate the effect of plasma electron temperature on THz intensity and efficiency. Our investigations reveal that emitted THz is radially polarized. Brightness and efficiency of THz significantly increase with plasma electron temperature. Our scheme predicts

The temperature properties of the first excited state (FES) splitting energy (FESSE) of a strongly-coupled impurity magneto acoustic polaron (IMAP) in monolayer graphene is studied by using the linear combination operator method, unitary transformation and quantum statistical theory. The expression of the FESSE versus the temperature, the Coulombic impurity potential strength (CIPS), the Debye cutoff

Lead zirconate titanate (PZT) ceramics of morphotropical phase boundary (MPB) composition shows enhanced physical properties on modification with suitable ions. In this work, Pb(Zr 0.52-x Ce x Ti 0.48 )O 3 , x = 0.00, 0.10 (PZCT) ferroelectric ceramics have been synthesized by solid state synthesis route. The ferroelectric nature of samples is confirmed by their transition of phase from the ferroelectric

This paper aims to provide a comparative analysis of hybrid ( Ag- Al 2 O 3 ) nanofluid and Al 2 O 3 mono nanofluid in a convective heat transfer process driven by electroosmotic and peristaltic pumping. Ethylene glycol (EG) due to its strong anti-freezing properties is taken as a base fluid. The features of mixed convection, magnetohydrodynamics, and Joule heating are also comprised in this study.

In this work, effective cell separation mechanism is proposed in microfluidic device with integration of three inlets out of which one is for suspension of biological cells and another two for effective hydrodynamic focusing of biological cells. The hydrodynamic focusing and its impact on cells as well as channel fluid velocity profile are examined by various designs having different auxiliary inlet

Through a semiquantal procedure, we study the perturbed modulation of amplitude and phase of Gross-Piteavskii equation describing trapped Bose–Einstein condensates in an optical lattice potential. By introducing quantum correctional parameters, the problem is quantized and leads to the derivation of a novel dynamical instability criterion. Additional degrees of freedom carrying quantum properties play

Atomistic modeling based on the Density Functional Theory (DFT) is used to study the structural, magnetic, electronic and mechanical properties of Fe 1 − x Al x alloys ( x ≤ 50%-at) with and without B, C and N additions over the selected range of Al atomic concentration. It is shown that a singularity around x Al ~ 40%-at is observed for the lattice parameters while the magnetic moment decreases uniformly

In the present work, we demonstrate the generation of Fano resonance (F) feature based on a defected one dimensional superconducting photonic crystal design. Our proposed design consists of alternated layers of high-temperature superconductor material with conventional ones. By using the transfer matrix method, we investigate the optical properties for the proposed designs. The obtained optical properties

Polycrystalline SmMn 2 O 5 has been synthesized by using sol-gel auto combustion tecnique. X-ray diffraction (XRD) pattern reflects the single phase formation of orthorhombic structure with Pbam space group. In the frequency range of (30–1000 cm −1 ) reflectivity spectrum reveals the 14 infrared active phonons out of 36, which are already pridicted theoretically. We have estimated the optical energy

The development of a magnesium ion conducting electrolyte is essential for designing rechargeable magnesium batteries. Herein, we report magnesium-ion conducting polymer electrolytes (PE) based on polyvinylidene fluoride (PVDF) and tetraethylene glycol dimethyl ether (TEGDME) with magnesium bromide salt processed by solution casting method. Fourier-transform infrared spectroscopy (FTIR) shows a composite

We develop a mathematical recipe for calculating the exact delocalized rate constant, for the end loop motion of a long polymer. It undergoes reversible reaction between two disjunct states, the open and the closed state, due to the effect of the surrounding solvent. The Smoluchowski-like equation mathematically represents the diffusion of the end monomers of the open polymer chain and the closed chain

The present study deals with the unsteady and incompressible viscous fluid flow with constant proportional Caputo type fractional derivative (hybrid fractional operator). We find analytical solutions of a well-known problem in fluid dynamics known as Stokes' first problem. MHD and porosity are also considered as an additional effects. Using dimensional analysis, governing equations of motion converted

We have investigated some cosmic transit models in the framework of an extended gravity theory where the usual Ricci scalar in the gravitational action is replaced by a sum of the Ricci scalar and a term proportional to the trace of the energy momentum tensor. A hybrid scale factor is assumed to simulate the cosmic transit behaviour. The hybrid scale factor has two parameters that describe the behaviour

Thin films of thermally evaporated gallium-phthalocyanine dichloride (GaPcCl) on a flexible polymer substrate have been studied. Structural as well as spectral optical properties of these films were investigated at a different film thickness of 45, 75, 100, and 150 nm. The structure of GaPcCl/polymer is found to be amorphous with a broad hump that is characterized by the polymer sheet. The absorption

The objective of current investigation is to perform mathematical modeling of natural convection and magnetic effects on hybrid nanomaterial convective transportation and numerically examined via new approach. The permeable terms in momentum equations based on non-Darcy approach. Mixture of ( MWCNT + Fe 3 O 4 ) with water was employed. Impacts of permeability, Rd, Lorentz force and Ra on nanomaterial

The effects of fourth-order dispersion (FOD) on modulation instabilities in the twin-core optical fibers with the asymmetric CW state are studied systematically. When the product of the group velocity dispersion and FOD is negative, in the anomalous dispersion regime, two new MI bands in the high frequency are generated with one band either having the equivalent gain with that of original band or dominating

The present work is devoted to the Rayleigh–Taylor instability of dilatant and Newtonian fluids. The main aim of this work was to carry out experiment, numerical simulation of mixing of two media, and making a comparison between gained data. A series of experiments was carried out to study the Rayleigh–Taylor instability of a dilatant liquid, which is a mixture of potato starch and water. The initial

The generation of entropy is correlated with irreversibility of any thermodynamic system. It provides an indication of a loss of energy and therefore a system’s efficiency. Therefore, an attempt has been made to investigate entropy generation and thermal analysis for peristalsis of silver-water nanomaterial through an inclined symmetric channel. The flow is influenced by magnetic field, temperature

Presented in this study is an analytical investigation on the size-dependent nonlinear vibration and pull-in instability of circular microplates subjected to the electrostatic, Casimir, and hydrostatic forces. Based on the modified strain gradient theory in conjunction with the Kirchhoff thin plate theory and von Kármán’s nonlinear kinematic relations, the governing equations were derived using the

We investigate Hawking radiation of regular Hayward black hole surrounded by quintessence. Using the null geodesic method, we derive the expression of the emission rate and deduce the expression of the Boltzmann factor of the black hole. The expression of the change of entropy is also derived using the first law of black hole thermodynamics. The results show that the Boltzmann factor increases when

This article presents point-like, aperture averaged scintillation, and bit error rate(BER) performance of cylindrical-sinc Gaussian beam (CSGB). We model atmosphere utilizing random phase screen approach to be up to the complexity of source field expression. Our results indicate that it is possible to generate resistive CSGBs against turbulence considering point-like scintillation. Aperture averaged

The main purpose of this manuscript is to study an unsteady, MHD and free convection flow with the thermal transport for an electrical conducted, incompressible, and linearly viscous fluid flow close to a moving vertical plate in the existence of an exponential heating process. The flow area is considered permeable half-space as well as the utilization of an electromagnetic field perpendicular to fluid

A main scientific goal of the ##IMG## [http://ej.iop.org/images/1402-4896/95/11/114001/psabbaa1ieqn1.gif] {${\mathsf{AE}}\bar{{\mathsf{g}}}{\mathsf{IS}}$} experiment is the direct measurement of the Earth’s local gravitational acceleration g on antihydrogen. The Weak Equivalence Principle is a foundation of General Relativity. It has been extensively tested with ordinary matter but very little is known

The oblique wave instability is studied extensively in cylindrical bounded quantum plasmas. This study emphasizes on role of quantum features of a plasma system like Fermi degenerate pressure, exchange-correlation potential and Bohm potential as well as the radius of cylindrical geometry on the instability. The growth rate is studied for two cases depending upon the ion gyro time scales. It is found

Fluid flow and heat transport by a stretched surface is most important and significant area of research in mechanical and industrial engineering due to numerous applications. The influence of heat transport is seen in the field of polymer processing, metallurgy and chemical engineering, manufacturing of artificial films, food stuff processing, aerodynamics extrusion of plastic sheets, hot rolling,

We theoretically investigate the eigenenergies of coupled Su-Schrieffer-Heeger (SSH) chains with ##IMG## [http://ej.iop.org/images/1402-4896/95/11/115801/psabbbcdieqn3.gif] {${ \mathcal P }{ \mathcal T }$} -symmetric imaginary potentials. It is found that the direct coupling between two SSH chains leads to the splitting of the topological edge states accompanied by the destruction of their original

The principle aim of this study is to analyse the entropy minimization in boundary layer flow of Casson fluid. Geometry of this examination is stretching sheet. Transverse magnetic field, thermal radiation and viscous dissipation effects are considered in their respective equations. Nonlinear differential equations are derived from the present flow by utilizing the appropriate similarity transformations

The spectra of the inverse scattering technique (IST) play a crucial role in the physics of nonlinear phenomena. They define the long term evolution of dynamical systems. We present the IST spectral portraits for the extensive three-parameter families of the first order doubly periodic solutions of the nonlinear Schrödinger equation that cover a wide range of physical phenomena such as modulation instability

In this work, we show in pedagogical detail that the most singular contributions to the slow part of the asymptotic density-density correlation function of Luttinger liquids with fermions interacting mutually with only short-range forward scattering and also with localised scalar static impurities (where backward scattering takes place) has a compact analytical expression in terms of simple functions

In this paper, we propose a new scheme for faithful bidirectional quantum teleportation (BQT) of special type of two-qubit entangled states by using single G state as a quantum channel. In 2016, by using five-qubit and six-qubit entangled states as the quantum channels, two different BQT schemes were proposed by Sang ((2016) Int. J. Theor. Phys . 55 , 1333) and Hassanpour et al ((2016) Quantum Inf

We discuss modulation instability for the generalized nonlinear Schrödinger equation based on nonzero background wave frequency. First of all, we analyze the existence condition of modulation instability under different perturbed frequency. The influences of the background amplitude, background frequency and perturbed frequency on the modulation instability gain are researched, respectively. Also,

This paper presents calculations of the magnetic moments, the quadrupole moments, and the form factors of a number of titanium isotopes as determined using the shell model space. The calculations of the shell model have adopted the model space (MS) with core-polarization effects, which were included for two types of effective g factors and different effective charges. The wave functions are generated

This research work interprets the mathematical study of peristaltic flow of non-Newtonian fluid across an elliptical duct. The heat transfer mechanism for this elliptical duct problem is also considered in detail. The mathematical equations for Casson fluid model are developed and then by using appropriate transformations and long wavelength approximation, this mathematical problem is converted into

The Dirac equation in the presence of Aharonov–Bohm-Coulomb interaction is studied in the framework of the extended uncertainty principle. The equation governing the dynamics of the system is reduced to a differential equation which is solved in terms of the hypergeometric functions as the wave functions of the system. Expressions for the bound-state energies are also obtained analytically. A brief

In this work, we investigated the influence of the geometrical confinement effects on the fundamental thermal properties of rutile and anatase TiO 2 for both cylindrical nanostructures (CNSs) and nanotubular structures (NTSs), respectively. Calculations of energy levels are developed in the framework of effective mass approximation by generalizing the resolution of Schrödinger equation in a truncated

Propagation of nonlinear electron plasma waves is investigated in a fully relativistic election-ion plasma using two-fluid hydrodynamic model. The relationship between pressure and density is assumed to be of polytropic form for relativistic electrons. The conditions for the validity of adiabatic equation of state for electron fluid is also discussed. The well-known pseudopotential approach is employed

The aim of current communication is to investigate the flow features of Cross nanomaterial over stretched porous surface subject to activation energy and magnetic field. The idea of gyrotactic microorganisms is used to stabilize the nanoparticles in Cross fluid. Temperature relation is modeled considering thermal radiation and viscous dissipation. Furthermore, Bio-convection through mutual effects

The second post-Newtonian solution for the equatorial motion of a test particle in the Kerr spacetime is derived under the harmonic coordinates. The effects of the spin-induced quadrupole on the equatorial motion are obtained. The solution is formulated in terms of the Kerr black hole’s mass and spin, as well as the particle’s orbital energy and angular momentum.

The numerical study is presented for the magnetohydrodynamic (MHD) squeezing flow of Jeffrey fluid between two parallel plates in a porous medium with the presence of thermal radiation, heat generation/absorption and chemical reaction. The effect of joule heating and viscous dissipation are also examined. Similarity transformation is implemented to transform the governing nonlinear partial differential

The non-relativistic analytic solutions of a quantum mechanical system have been calculated for the case of pseudoharmonic potential by using the Whittaker functions approach. A diatomic quantum system is placed in a Pseudoharmonic potential and perturbed by an external magnetic field. The resulting Schrodinger’s equation has been solved exactly to obtain the analytic expressions of vibrational energy

In this paper, we have investigated the ion temperature gradient (ITG) driven electrostatic drift waves in the presence of non-thermal electrons that follow the generalized ( r , q ) distribution. In the linear regime, we have derived the linear dispersion relation of the coupled drift-ion acoustic wave. In the nonlinear regime, stationary solutions of the nonlinear equations have been obtained in

The present work reports the development of an optimized ultra-intense laser—solid target interaction system which aims to achieve higher intensities for different pulse durations, down to few-cycle regime, considering different micro-structured profiles of the internal cone target walls. A spatio-temporal analysis of the electromagnetic field in the interaction area is elaborated in order to provide

Optical properties including absorption, dispersion, group index, Kerr nonlinearity, and optical bistability of a three-level V-type atomic medium have modified by varying an external magnetic field. By changing the magnitude or the sign of the external magnetic field, the transparency window with normal dispersion transfers to the enhanced absorption with anomalous dispersion at the line center, and

The current communication explore the nonlinear thermal radiation and heat absorption/generation aspects in rate type nanofluid containing gyrotactic microorganism. The bidirectional periodically moving surface induced the flow. The nonlinear radiation features are elaborated in the heat equation. With applications of apposite primarily quantities, the governed equations are transmuted into non-dimensional

In this paper we propose a hybrid electro-optomechanical system consisting of capacitively coupled optical and microwave cavities. An optical parametric amplifier (OPA) is mounted inside the optical cavity. The capacitor of the microwave cavity is formed of two mechanical resonators, which are under the effect of a DC bias voltage. We will show that changing the DC voltage affects on the output spectra

Nonclassical quantum mechanics along with dispersive interactions of free particles, long-range boson stars, hydrodynamics, harmonic oscillator, shallow-water waves, and quantum condensates can be modeled via the nonlinear fractional Schrödinger equation. In this paper, various types of optical soliton wave solutions are investigated for perturbed, conformable space-time fractional Schrödinger model

In previous experiments, compounds TiC, TaC, and ZrC are often added in W to improve the mechanical and thermal properties. However, it is still not clear how atomic Ti, Ta and Zr coexisted with C will affect H behaviors in W. In this work, systematical ab initio calculations are carried out to study the interactions among alloying atoms (Ti, Ta and Zr), H, and C. The results illustrate that substitutional