Numerical approaches play an outstanding role in solution of quantum mechanical problems with due attention to the complexity of analytic solutions for open systems. This paper studies quantum characteristics of the previously proposed side-contacted field-effect diode (S-FED) as an emerging device in the modern system-on-chips (SoCs) using the finite-difference method (FDM). The characteristics obtained

We proffer in this research a distinctive, facile to fabricate, and highly sensitive photonic crystal fiber (PCF) biosensor based on the phenomenon of surface plasmon resonance (SPR). Our prototype has a strategic pattern of circular air holes inside the fiber, which leads to a superior sensing performance. The evaluation of all the sensor characteristics has been discharged by employing the finite

Laminated Ti3C2Tx MXene has been considered as a promising absorbing material. However, microwave absorption (MA) performance of single Ti3C2Tx MXene is always limited. The introduction of magnetic components has been proven to improve impedance matching and MA performance effectively. In this paper, a novel [email protected]3C2Tx composites with various CoNi loading were in-situ fabricated via a simple

In the present paper, the system of equations for the ion sound and Langmuir waves (SEISLWs) is considered to obtain the new solitary wave solutions of the non-linear evolution equations. Here, we used the relatively two new analytical methods to achieve the exact solutions of the SEISLWs model. Also, the attained results show many different wave natures like hyperbolic function, exponential function

Dispersive waves (DWs) radiation in optical fibers allow to excite frequencies in spectral regions that are otherwise difficult to access. However, the resonant emission is weak and phase matching inhibits its shaping, making it ineffective in many applications. Here, we numerically investigated that DWs generated from high-energy pulses propagating in nonlinear optical fibers can be controlled through

In laser-plasma interactions (LPI), the laser beam mode is a critical parameter when trying to explore new physical phenomena. Of the various spatial beam modes, the Laguerre-Gaussian (LG) mode with vortex phase has attracted considerable attention due to its unique features, including the ability to carry an orbital angular momentum. Due to this, it has been actively applied to LPI, which mainly utilize

Flexible graphene smart electronics are a kind of electronic device made of silver or other inorganic material and a flexible graphene web substrate. Because of their flexibility and excellent electronic properties, flexible graphene smart electronics have become a research topic of interest. However, during the mass production process, the high-speed transmission of the continuous tension state is

This paper studies the (2+1)-dimensional hyperbolic nonlinear Schrödinger equation. The first integral of this equation, the phase portraits and the effective potentials are provided. Two different methods are applied to find exact analytical solutions. These methods are the arbitrary nonlinear parameters and the new Jacobi elliptic function expansion method. To give a behavior of the equation studied

In this article we obtain generalized semi-discrete short pulse equation through discretization of the associated linear eigenvalue problem of the short pulse equation. Through implication of different symmetry reductions on the generalized semi-discrete short pulse equation, new integrable equations are assembled such as complex and the PT-symmetric nonlocal semi-discrete short pulse equation. Darboux

In this article we have discussed the analytical analysis of two dimensional modified Korteweg-devries (mK-dV) equation arising in plasma physics that governs the ion-acoustic solitary waves for their asymptotic behavior because of the trapping of electrons using auxiliary equation mapping method. By using this technique we have obtained some quite general and new variety of exact traveling wave solutions

Recently, the evolution of wireless energy transfer can be described as Schrodinger equation. Thus, the transfer protocol of wireless energy transfer can be designed by coherent quantum control techniques, which can achieve efficient and robust energy transfer from transmitter to receiver. In this paper, we propose a novel design of wireless energy transfer which obtains the longer distance, efficient

We investigate the dynamics of Si spherical nanoparticles for different infrared wavelengths in a system based on two circularly polarized counter-propagating Gaussian beams. Through the analysis of the dipolar and quadrupolar forces, we obtain several conditions under which these nanoparticles describe different types of attractive or repulsive spirals at focus plane depending on the efficiency of

Peak power is a critical factor for sub-nanosecond-pulsed transmitters utilizing laser diodes (LD) and applied to long distance LIDARs (light detection and ranging) for drones and automotive applications. Receiver speed is not anymore a limiting factor thanks to replacing linear (typically avalanche) detectors and a broad-band amplifier with a single photon avalanche detector (SPAD). Consequently the

True-color image of Mars is important for mineral analysis. The working light source of the Mars exploration multi-spectral camera is different from the laboratory calibration light source, so that the commonly used RGB calibration method has a large color difference in correcting the on-orbit images. After analyzing the influence of light source lightness and relative spectral distribution on the

Pure, iron-doped, and glucose capped ZnO nanoparticles (NPs) have been synthesized by a chemical precipitation method. The structural, optical, and photoluminescence properties of all the prepared samples are examined systematically. X-ray diffraction patterns of all the samples exhibited a single hexagonal wurtzite structure with an average crystallite size ranging from 1.01–1.78 nm. Transmission

A molecular dynamics (MD) simulation was performed on the coalescence kinetics and mechanical behavior of the pressure-assisted Cu nanoparticles (NPs) sintering at low temperature. To investigate the effects of sintering pressure and temperature on the coalescence of the nanoparticles, sintering simulations of two halve Cu NPs were conducted at the pressure of 0–300 MPa and the temperature of 300–500 K

In the present study, the fluid flow and heat transfer of a Cu-water nanofluid in a L-shaped enclosure with a baffle is numerically simulated using the Lattice Boltzmann Method (LBM). The implementation of different baffle combinations with the L shape cavity is the novel contribution of this study. The effect of baffle configuration on natural convection in different parameter ranges of Rayleigh number

We present an approach to modify emission spectra of amplifiers by local density of states engineering with structured waveguides. More specifically, an inverse design algorithm is adopted to obtain the geometric parameters of the proposed structure that meets the local density of states target. The finite-difference time-domain numerical results indicate that the 3 dB bandwidth and the figure of merit

Cylindrical vector vortex beams (CVVBs), possessing both spatially nonuniform phase and polarization distribution, have attracted research interests in many applications due to their unique optical properties. Although various methods have been previously demonstrated, the generation of CVVBs with arbitrary topological charge and polarization order remains elusive. We introduce cross-polarized modulation

The theme of this paper focuses on the mathematical modeling and transmission mechanism of the new Coronavirus shortly noted as (COVID-19), endangering the lives of people and causing a great menace to the world recently. We used a new type epidemic model composed on four compartments that is susceptible, exposed, infected and recovered (SEIR), which describes the dynamics of COVID-19 under convex

The phonon behavior of various Ge-based samples has been investigated in great detail. The study comprised Ge films (amorphous and partially crystallized and alloyed with oxygen), crystalline Ge wafers (pristine and alloyed with oxygen), and GeO2 powder. The oxygen-containing samples obtained after thermal annealing the Ge film and Ge wafer correspond to sub-stoichiometric GeO2, or the so-called Ge+GeOx

The impact of adding PbO and WO3 on the mechanical properties and radiation shielding efficiency of 4 different glass samples labeled as TWP1, TWP2, TWP3, and TWP4 (samples codes) was studied via the Makishima and Mackenzie model (MMD), Rocherulle model (RD), XCOM database, FLUKA code, and Phys-X/PSD software. According to MMD, Young's (Y), bulk (K), shear (G) modulus values increase from 59.13 to

In this Letter, we report the second harmonic generation (SHG) in a colloidal solution of CdSe/CdS nanoplatelets (NPLs) in the case of two-photon excitation in the region of exciton transition from the light holes sub-band to the conduction sub-band (549 nm, 1lh-1e) by femtosecond laser pulses (1064 nm, 100 kHz). Discovery of the SHG in colloidal solutions of NPLs opens up new perspectives for their

The paper discusses a new method that combines frequency and phase domains-gated reflectometry. This approach can be applied to a fiber with artificial reflectors to measure the absolute values of optical paths between reflection points in the fiber in the full range of signal frequencies, including zero frequency.

The comparative analysis of the mechanical activation and Al2O3 doping effect on the densification behavior of tetragonal 3Y-TZP nanopowders has been carried out. Two types of zirconia nanopowders doped by alumina have been studied. Namely, nanopowders obtained by the mechanical mixing and co-precipitation methods. The behavior of nanopowders at initial stage of sintering was examined by the constant

In this article, the instigator sets up the profuse traveling wave solutions four types of fractional nonlinear equations in the sense of conformable derivatives by using the novel form of modified mathematical technique. The constructed traveling wave solutions are articulated in terms of trigonometric, hyperbolic and exponential functions. The derived results are fruitful for the physical demonstrations

The carbon nanostructures (CNS) were successfully grown during the chemical vapour deposition of ethene (C2H4) and hydrogen (H2) over a supported Ni0.362Fe0.64 catalyst. The temperature of the reaction was varied between 400 °C to 700 °C with different ratios of hydrogen and ethene (20/80, 50/50 and 80/20). The increase of the H2 in the reaction gas gives higher deposition yield of carbon where the

According to density functional theory (DFT), a novel carbon allotrope is first predicted and investigated in this paper, denoted as oP72 carbon. oP72 carbon is mechanically stable and dynamically stable. There are fourteen carbon atom positions in oP72 carbon, it is an all-sp3 hybridized bonding network, and 4, 5, 6, 10 and 12 membered rings exist in the crystal structure of oP72 carbon. The shear

A bi-tunable switchable dual-band THz absorber using vanadium dioxide (VO2) and Dirac semimetal films (DSFs), which is independent on polarization, is proposed. The frequency and intensity of absorptances of the two absorption peaks can be dynamically changed by tuning the Fermi energy of the DSF or the VO2 conductivity. Moreover, the absorber can alternate between an absorption function (with an absorptance

We analyze the paper “Construction of traveling waves patterns of (1+n)-dimensional modified Zakharov-Kuznetsov equation in plasma physics” by Adil Jhangeer and et al. [RINP, 2020, 103330] and demonstrate that results of this paper are wrong. The correct results are given.

This work aims to propose a new analyzing tool, called the fractional iteration algorithm I for finding numerical solutions of nonlinear time fractional-order Cauchy reaction-diffusion model equations. The key property of the suggested technique is its ability and flexibility to investigate linear and nonlinear models conveniently and accurately. The proposed approach can be utilized without the use

An ultrathin broadband metasurface-based absorber, comprised of tungsten nanowires, was studied under the normal and oblique incidence of transverse electric (TE) and transverse magnetic (TM) waves. The effect of geometrical parameters on the absorption spectra was investigated through the surface electric field and power patterns at certain operating wavelengths. The structure was found to exhibit

In this paper, the Bogoyavlenskii-Kadomtsev–Petviashvili (BKP) equation is taken into consideration by means of Lie symmetry analysis. Infinitesimal generators are computed under the invariance criteria of Lie groups and symmetry group for each generator is reported. Henceforth, conjugacy classes of abelian algebra are used to find the similarity reductions, which convert the considered equation into

The current research work is devoted to address some results related to the existence and stability as well as numerical finding of a novel Coronavirus disease (COVID-19) by using a mathematical model. By using fixed point results we establish existence results for the proposed model under Atangana-Baleanu-Caputo (ABC) derivative with fractional order. Further, using the famous numerical technique

This paper introduces a series of asymmetric multi-vortex solitons, which made up of Gaussian beam and embedded multi off-axis shift vortex, in nonlocal nonlinear media. The analytical expression of the soliton trajectory is derived, and the other propagation properties, such as the intensity distribution, the rotating period, and the orbital angular momentum (OAM) are all investigated. It is found

Cadmium substituted in Ni-Zn ferrite nanoparticles at different ratio and prepared by sol-gel auto combustion method. Their structural, morphological, compositional, magnetic and electrical properties were studied using XRD, FE-SEM with EDS, FTIR, VSM and DC electrical resistivity. From XRD shows single-phase spinel cubic structure and lattice constant increased, due to its higher ionic radius of 0

In the present study, nanocomposites with different ratios of NiO and Co3O4 (x= 0.3, 0.5, and 0.7) have been prepared via microwave oven and characterized using XRD. FLUKA code has been used to estimate the values of the mass attenuation coefficient (μm) for all samples. From the measurement, we found that when the thickness of the samples increases, the gamma transmission values ​​decrease. Besides

This article presents a metamaterial based on a modified asymmetric circular split ring resonator for absorber applications in the microwave regime. This metamaterial absorber (MMA) exhibits four absorption peaks to cover C, X, and Ku band applications. The MMA unit cell is formed on a low-cost FR4 substrate with electrical dimensions of 0.106 λ0 × 0.106 λ0, for which wavelength, λ0 is calculated at

The paper presents the results of a computational thermo-kinetic model of laser heating of GeTe thin films and their subsequent thermoconductive and radiative cooling. A comparison of this model and experimental results of observing of reversible phase transitions in thin films under impact of nanosecond pulsed laser radiation with «top hat» beam intensity distribution was performed. It was shown that

A unique electrode architecture consisting of Ni3Se2 nanosheet-on-Ni3Se2-nanoforests grown on nickel foam was obtained by a simple one-step solvothermal method, which subsequently used as a free-standing electrode for supercapacitor. The Ni3Se2 exhibited a high capacity of up to 600 μAh cm−2 at 3 mA cm−2, excellent rate capability and cycling stability at high cycling rates. Impressively, the optimized

The subwavelength structure based on metamaterials is widely used in the field of photonics due to its unique electromagnetic properties. Here, a Fabry-Perot-like cavity structure composed of aluminum and silicon materials is proposed, of which resonance peak can shift in the whole visible light band, and makes the materials display different colors. In addition, the edge detection algorithm is used

As stated in the present research, the anisotropic non-Kolmogorov turbulence model is more in line with the actual turbulence. However, anisotropic factor is vital for the accuracy of calculations, and measuring it precisely is a challenging task. In this paper, utilizing three modeling approaches, we derive four different equivalence formulas between the anisotropic non-Kolmogorov and the Kolmogorov

We propose a new class of abruptly autofocusing beams, the chirped annular Bessel Gaussian beams (CABGBs), which are based on the radial Bessel profile. By using the Rayleigh–Sommerfeld diffraction formula, the nonparaxial propagation of the CABGBs is investigated. We find that the initial chirp with negative value tends to intensify the abruptly autofocusing property by shortening the focal length

In this study, the interpolating element-free Galerkin (IEFG) method for solving three-dimensional (3D) transient heat conduction problem is presented. By using the improved interpolating moving least-squares (IIMLS) method to form the shape function, and using the weak form of 3D transient heat conduction problems to obtain the discretized equations, the formulae of the IEFG method are obtained. The

An efficient technique, namely Exp-function method is used to construct the new exact analytic solutions of universal problem fractional modified unstable Schrödinger equation (FMUSE) with varying dispersion, nonlinearity, and the gain or absorption which could describe the propagation of optical pulse in inhomogeneous fiber systems. As a result, we secure exact solutions in the forms of hyperbolic

Measurement of electron energy spectra of dielectrics is a challenge due to charging issues. This article presents experimental results of electron energy spectra of dielectric materials under electron irradiation obtained by transforming the charging process into a spectroscopic tool. The technique was verified on conductive materials in a previous paper. This method is based on capturing the charging

A new cubic superhard large-cell carbon allotrope with 200 carbon atoms per unit cell (named c-C200) is theoretically predicted by the unbiased swarm structure searching techniques combined with the first-principles calculations. The phonon and elastic constants calculations show that c-C200 is dynamically and mechanically stable. The calculated hardness of c-C200 is 47 GPa, which means that c-C200

In this article, we construct exact solutions of the Bogoyavlenskii equation using (1/G′)-expansion and (G′/G,1/G)-expansion techniques. Both techniques have been successfully implemented to obtain exact solutions including hyperbolic, complex trigonometric, trigonometric and rational solutions of the Bogoyavlenskii equation. 3D, contour and 2D graphics are presented of the solutions obtained for different

Surface adsorption of N2 molecules is a critical factor to limit the reduction of secondary electron (SE) yield (SEY) in many fields of applied physics. On the basis of the Polanyi potential theory, we describe a multi-layer N2 physical adsorption model to arrange the distribution of N2 molecules adsorbed on a Cu (110) surface. Considering six scattering types, we used a Monte Carlo method to develop

The ferrofluid are useful nanofluid and can be prepared by mixing magnetic types of nanoparticles in base fluid. The mathematical modelling of ferrofluid under induced magnetic field through a vertical stretching surface is formulated in the current theoretical study. The study is performed for ferrofluid by considering magnetite Fe3O4 magnetic nanoparticles in base fluid. In ferrofluid, the appropriate

In this paper, we present a computational analysis method for the study of silicon dioxide (SiO2) graphene-based and amorphous silicon (a-Si)-graphene based nano meta-atoms in the terahertz (THz) regime. The proposed meta-atoms were modeled using a SiO2 substrate, optimized using a-Si substrate, and “sandwiched” between graphene layers. The octagonal-shaped torus was geometrically designed as a 3D

In this work, we apply the new idea of fractal fractional operator to the optimal control for Malaria mathematical model, where the derivative is defined in the sense of Caputo and the parameters are modified. In order to minimize the low-risk and high-risk infectious humans, two control variables are introduced. Necessary optimality conditions are derived. Nonstandard finite difference scheme is constructed

The aim of this comment paper is to discuss an incorrect approach in the investigation of the optical properties which has been presented in a published article. Also, it is pointed out that some of the reported results in the original work are erroneous.

Doped polymeric hybrid thin films based on Poly-Methyl-Meth-Acrylate (PMMA) and Poly-vinyl-alcohol (PVA) doped with silica nanoparticles (SiO2 NPs) are synthesized using the dip-coating technique. The as-prepared (PMMA-PVA)/SiO2 nanocomposite (wt% of SiO2 NPs = 2%, 4%, 8%, and 16%) are deposited on glass substrates. Transmittance (T%) and reflectance (R%) are measured using a UV–Vis spectrometer. Furthermore

Optical sparse aperture (OSA) systems show great potential for the next generation astronomical telescope system due to its excellent high resolution with low volume and weight. However, the sparse arrangement causes its mid-frequency modulation transfer function to be lower compared with a single fully-filled aperture system, which further leads to blurred images and reduced contrast. Therefore, image

The free vibrations of nonlocal Euler and Timoshenko beams have been studied extensively, but there still remain some problems concerning boundary conditions and constitutive relations. For cantilever beams, a counterintuitive stiffening phenomenon is widely observed. And to the best of the authors’ knowledge, there is no work concerning about the Timoshenko beam with nonlocal shear force and local

We study a further modified (3+1)-dimensional(3D) Zakharov-Kuznetsov equation. The classical Lie symmetry method will be employed to obtain solutions of a further modified 3D Zakharov-Kuznetsov equation. We will also establish the multiplier method to derive conservation laws of the underlying equation. Moreover, a brief physical interpretation of the derived conserved quantities is conferred.

The paper presents the results of a comprehensive study of yttrium gallium borate (YGa3(BO3)4) crystals low-doped (0.2 wt%) with erbium (Er3+) ions by in-situ X-ray diffraction (XRD), radioluminescence (RL), thermally stimulated luminescence (TSL) and electron paramagnetic resonance (EPR) techniques. Structural and elastic properties of YGa3(BO3)4: Er3+ crystals measured by the XRD method in the temperature

Polycrystalline Yb-substituted Ni-Zn nanoferrites with the compositions of Ni0.5Zn0.5YbxFe2-xO4 (x = 0.00, 0.04, 0.08, 0.12, 0.16 and 0.20) have been synthesized using sol–gel auto combustion technique. Single phase cubic spinel structure has been confirmed by the X-ray diffraction (XRD) patterns. Larger lattice constants of the compositions are found with increasing Yb3+ concentration while the average