Showing papers in "Physics Letters A in 2019"

TL;DR: In this paper, the effects of mass transfer on second grade fluid flow subjected to the heat transfer incorporated with the relaxation time to reach the state of equilibrium on or after a state of upheaval is analyzed.

TL;DR: In this paper, general N-solitons in three recently-proposed nonlocal nonlinear Schrodinger equations are presented, including reverse-space, reverse-time, and reversespace-time nonlinear solitons, which are nonlocal reductions of the Ablowitz-Kaup-Newell-Segur hierarchy.

TL;DR: A four dimensional chaotic system which has a plane as the equilibrium points is analyzed and it is revealed that in some ranges of the parameter, this chaotic system has three different types of coexisting attractors, chaotic, stable node and limit cycle.

TL;DR: In this paper, the dual solutions of the two-dimensional magnetohydrodynamic (MHD) flow of Casson fluid and heat transfer over the stretching sheet were examined and shown to be numerically stable.

TL;DR: In this article, the (2+1)-dimensional KdV and mKdV equations were analyzed on the basis of the extended Lax pair and the symmetry generators were determined.

TL;DR: In this paper, the entropy-based uncertainty with respect to a pair of incompatible measurements under a bipartite qubit-system suffering from quantum decoherence induced by hierarchical environments is studied.

TL;DR: In this article, a tunable dual-band metamaterial perfect absorber (MMPA) consisting of two-intersecting graphene nanorings arrays is presented, and the optical absorption performance of absorber is dominated by the inner/outer radius and center distance between the two arrays.

TL;DR: In this paper, the authors inspected the heat and mass transfer of a magnetohydrodynamic tangent hyperbolic nanofluid flow and analyzed the impact of intricate physical parameters on the velocity, temperature and concentration profiles.

TL;DR: In this paper, a modified Zakharov-Kuznetsov equation was derived from the barotropic potential vorticity equation with the complete Coriolis parameter, the topography and the dissipation.

TL;DR: In this paper, the authors describe the design of a broad, locally-resonant, bandgap in a phononic crystals using a numerical simulation, which consists of periodic double-sided novel composite sonators, deposited on a 2D locally-reonant phononic-crystals plate made of a rubber-filler array, which is embedded in an epoxy plate.

TL;DR: In this article, four vertical heterostructures based on two-dimensional transition-metal dichalcogenides (TMDs) were studied by density functional theory calculations to investigate their structure, electronic characteristics, principle of photogenerated electron-hole separation, and optical-absorption capability.

TL;DR: In this paper, an improved Hirota bilinearning method for non-local complex modified Korteweg-de Vries (MKdV) equation is presented.

TL;DR: In this article, the authors obtained families of semi-rational solutions termed lump-soliton solutions to the Fokas system by using the Hirota's bilinear method combined with the Kadomtsev-Petviashvili (KP) hierarchy reduction method.

TL;DR: In this paper, the authors discuss the significance of parameter calibration for accurate simulation of pedestrian flow through narrow exits using social force model and identify the two parameters that are most critical, and then calibrate them based on a set of experimental observations.

TL;DR: In this article, a numerical simulation study on elastic wave propagation for a novel engineered thin plate metamaterial structural system is presented, where the effects of material and geometric parameters on bandgaps are discussed.

TL;DR: In this article, the coherence and entanglement of two separated quantum dots placed in an open microcavity were explored and the phenomena of sudden death and sudden birth were observed.

TL;DR: The proposed method has been evaluated on real-world known datasets, such as the Facebook social network and American football clubs, and by comparing it with the basic LPA, the effectiveness of the proposed method in terms of the quality of the communities found and the time complexity has been shown.

TL;DR: In this paper, the Klein-Gordon (KG) equation for the linear combination of Hulthen and Yukawa potentials is solved based on a developed scheme, and the eigenvalues and corresponding radial wave functions expressed by the Jacobi polynomials or hypergeometric functions are consistent.

TL;DR: In this article, the authors demonstrate the generation of vortex solitons in a model of dissipative optical media with the singular anti-cubic (AC) nonlinearity, by launching a vorticity-carrying Gaussian input into the medium modeled by the cubic-quintic complex Ginzburg-Landau equation.

TL;DR: In this paper, a comparative study between LQFI and LQU was conducted for the quantum Heisenberg XY model and the isotropic XY model submitted to an external magnetic field and it was shown that LFI reveals more quantum correlations than LQU.

TL;DR: In this paper, the authors investigated the features of nanoparticles mass flux conditions and non-uniform heat sink/source on magnetite Oldroyd-B nanofluid.

TL;DR: In this article, the Morse parameters for the interaction of graphene and silicene surfaces with the atoms of practically important metals Ni, Ag, and Li were derived from the dispersion corrected density functional calculations.

TL;DR: In this article, a mathematical model for transient nature thin film flow of Maxwell nanofluid over a rotating disk is studied in the presence of a uniform magnetic field and nonlinear thermal radiation.

TL;DR: In this article, the authors proposed a new rotated thermal cloak which can unify the conventional cloaking and rotating together, and realize the while-rotating-while-cloaking effect.

TL;DR: Using dispersion-corrected density functional theory calculations, the adsorption behavior of NO and NO2 molecules is studied over B-doped and BN-co-decoded graphene sheets (BCmNn-Gr; m, n = 0, 1, 2, 3 and m + n = 3 ) in this article.

TL;DR: In this article, the effect of both array on the optical absorption and current density of solar cells was investigated by using finite difference time domain (FDTD) method, and the results indicate that by plasmonic action of arrays, the solar cells' optical absorption is significantly enhanced and optimized structure yields a current density that is 25.77 mA/cm2.

TL;DR: An optical image encryption scheme based on the Deoxyribonucleic Acid (DNA) theory and the double random phase encoding (DRPE) technique and an optical exclusive-OR (XOR) gate to achieve XOR operation in DNA encryption is proposed.

TL;DR: In this paper, a series of molecular dynamics simulations has been carried out to study the mechanical properties of nanocrystalline platinum and the effects of average grain size and temperature on mechanical behaviors are discussed.

TL;DR: In this paper, the optical characteristics of two new graphene-based photonic crystals are studied in detail, and a structure containing alternating layers of graphene and SiO2 slabs is considered as the ideal crystal.

TL;DR: In this article, the effect of CO adsorption is to reduce the band gap in both types (BN/AlN) of the nanoribbons, and a finite magnetic moment (0.96 μ B for ZBNNR and 0.69 μB for ZAlNNR) has been obtained.