Stickiness refers to the destructed orbits in phase space that remain in a particular region around intact surfaces for a long time before entering the chaotic sea. In fusion plasmas, stickiness regions trap magnetic field lines for many toroidal turns and have considerable effect on plasma transport. We locate stickiness regions in the chaotic phase space of resonant magnetic perturbations in tokamak

In this paper, the characteristics of nuclear supersymmetry in transitional nuclei are investigated. The structure of the two types of nuclear supersymmetry schemes, based on the U(6/2) and U(6/4) supergroups, is discussed. We focus on the quantal analysis and present the phase transition observables such as the level crossing, the expectation values of the d-boson and the fermion number operators

In our world, the standard model of particle physics contains within it the fairly intractable theory called QCD. A toy version with two colours is often studied as a model confining and chiral symmetry breaking field theory. Here, we investigate the cascade of changes at various distance scales if we make this change within the standard model. It is possible to limit the changes at the hadronic scale

In this paper, the Noether symmetries and their inverse theorems for dynamical systems with two kinds of nonstandard Lagrangians via quasi-coordinates, namely exponential and power-law Lagrangians, are presented and discussed. For each case, the corresponding Hamilton principle for the nonstandard Lagrangian dynamical systems via quasi-coordinates is given, and the differential equations of motion

The present paper deals with the theoretical study of a weakly non-linear Rayleigh–Bénard convection in temperature-dependent viscosity Newtonian liquids with temperature/gravity modulation. The effect of temperature-dependent variable viscosity and temperature/gravity modulation renders the problem analytically intractable. The imposed thermal boundary condition and gravity field consist of a steady

The present study analyzes the forced convective boundary layer flow of viscous incompressible time-established fluid. The base fluid containing water-based nanoparticles and gyrotactic microbes. The flat surface is considered with leading-edge accretion (or) ablation. Characteristics of flow are explored by the impacts of thermal radiation and constructive/destructive chemical reaction. The present

The quaternary Heusler LuCoTiSi, LuCoTiGe, and LuCoTiSn compounds' physical properties have been investigated using the GGA approximation based on the density functional theory. These compounds are stable in the ferromagnetic phase and semi-stable in the non-magnetic phase. Elastic studies show that these compounds are quite stable and belong to the category of ductile materials. Phonon calculations

For a long time, strong coupling expansions have not been applied systematically in lattice QCD thermodynamics, in view of the success of numerical Monte Carlo studies. The persistent sign problem at finite baryo-chemical potential, however, has motivated investigations using these methods, either by themselves or combined with numerical evaluations, as a route to finite density physics. This article

In this article I describe the work done with Pushan Majumdar that provided a significant push towards identifying Yang–Mills flux tubes(our works only deal with flux tubes of pure gauge theory, i.e. without dynamical quarks) as the hadronic strings of early days. The main finding was that the static potential V(R) for large \(Q\) \({{\bar{Q}}}\) separations R has the form (D is the space-time dimensionality)

Twist measurement based on the transmission of fixed wavelength of a helical long-period fiber grating is studied. The single-mode fiber is spiraled by a welding machine. There are two resonance dips near 1473 nm and 1517 nm, with the pitch length around 782 μm. The experimental results show that the transmission near 1473 nm decreases along with contra-direction twist and increases along with co-direction

This article intends to explore the onset of free convection flow of silver nanofluid in an enclosed square cavity filled with saturated porous medium bounded by adiabatic horizontal walls and isothermal vertical walls at different temperatures using a two-temperature thermal non-equilibrium model. The flow is assumed to follow Darcy law. The governing boundary layer equations are obtained based on

Thermogravimetric analysis, differential scanning calorimetry analysis and complex impedance spectroscopic data have been carried out on (C6H20N3)BiI6.H2O compound. The results show that this compound exhibits a phase transition at 325 K which was characterized by differential scanning calorimetry spectroscopy and dielectric measurements. The dielectric analysis has been studied by using impedance

We have studied the alpha decay properties of actinides using seven different proximity potentials MP 77, MP 81, Bass 77, Prox 13, Ng80, DP00 and Prox 00. The values produced by the present work are compared with experiments. Decay chains of actinides are presented. The present work is useful in the study of decay modes of actinides.

A simulated interferograms of multiple-beam interference Fizeau fringes (in transmission) and a modeling equation which simulates the phase modulation of polyethylene fiber (HDPE fiber) with different draw ratios were presented. As far as we know, this is the first time that a modeling equation has been presented that simulates the multiple-beam Fizeau interferograms for drawing polyethylene fibers

The rotating magnetocaloric effect has been researched in double perovskite Tb\(_{2}\)CoMnO\(_{6}\) by Monte Carlo simulation. The magnetization, specific heat and isothermal entropy change are presented for magnetic fields in different directions (\(h\parallel c\) and \(h\perp c\)). The rotating magnetic entropy, transition temperature and relative cooling power are given as well. Due to the different

The symmetry and mixed-symmetry states of \(^{144{-}154}\)Nd isotopes are studied via the framework of the proton–neutron interacting boson model. The F-spin values of theoretical energy states are also investigated. The calculated electromagnetic transition probabilities B(E2), B(M1) and the mixing ratio \(\delta (E2/M1)\) are compared with available experimental data. The results obtained show that

This paper explores the optical solitons with Kerr laws nonlinearity for the complex Ginzburg–Landau equation with M-truncated and beta derivatives which describes solitons propagation. In this regard, two new methods, namely extended sub-equation and unified solver method, are used. From general, hyperbolic, and trigonometric functions, we obtain novel and general solitary solutions. All obtained

In this article, we review some of the recent developments toward the future goal of quantum computing or quantum simulating lattice-QCD. This includes a novel theoretical framework developed for non-Abelian gauge theories that is the first necessary step toward this goal. We also review some immediate applications of this framework in the context of both digital and analog quantum simulations of SU(2)

In this paper, multiple rogue wave solutions of the (2+1)-dimensional Sharma–Tasso–Olver equation were studied by applying the bilinear neural network method. First, we introduced a single-hidden layer neural network model (NMM) and several types of solutions which can be calculated by this model have been summarized. Additionally, we introduced a “3-2-4” NNM and obtained the solution expression by

Improved thermoelectric (TE) property involves low thermal conductivity (k) but high electrical conductivity (\(\sigma\)) and Seebeck coefficient (S). Experiment has confirmed that interfacial polarization electric (IPE) field (~ 1 MV/cm) of GaN/InxGa1−xN/GaN superlattices (SLs) enhances both S and \(\sigma\). In this work, role of IPE field on thermal boundary resistance (TBR) and in-plane (kip) as

The nano-crystalline mixed ferrites with the generic formula MnxMg1 − xFe2O4 (x = 0.0–1.0, step: 0.2) were prepared by the citrate-gel auto-combustion technique. Motivated by anomalous magnetic behaviour of coarse-grained MnFe2O4, the main aim was to study the influence of Mn2+ substitution in MgFe2O4 on magnetic structure at nano-regime. The compositional stoichiometry of the final ferrite products

In this paper, heat current through a single-level quantum dot between two non-magnetic leads has been studied. The system is in non-equilibrium caused by different temperatures at leads. The Anderson model is used to model quantum dot with a single spin-degenerated level. The equations of the energy levels and their occupation of the quantum dot are solved self-consistently; then the heat current

This research article intends to investigate the entropy generation in the context of unsteady thermocapillary convection of a hybrid nanoliquid thin film over a disk within magnetohydrodynamic considerations. A set of partial differential equations using Prandtl’s boundary layer theory has been written to present the flow situation in mathematical form. Irreversible processes of viscous and Joule

Ternary zinc–sodium–phosphate glasses doped with transition metal of the composition Na2MxZn1−xP2O7(x = 0, 1, 2 and 5 mol %) (where M = Ni, Cu and Co) were prepared by the traditional quenching method. The ac conductivity measurements at different temperatures for the prepared glasses have been investigated, and the activation energy for dc conduction has been determined in each transition metal doped

Nonlinear propagation of magnetoacoustic waves in magnetized, collisionless, warm bi-ion plasmas with positive and negative ions of different masses and charge states are investigated. The two-fluid model is used here. Using reductive perturbation technique, the Korteweg-de Vries equation is derived as nonlinear dispersion relation, and its solution for the magnetoacoustic solitons propagating in the

We propose a five-level quasi-tripod type atomic system for realizing two-channel cross-phase modulation (XPM) based on the light-storage. Due to the existence of the double dark-state polaritons, both probe fields can be coherently mapped into and out of the cold atoms by switching off and on the coupling field adiabatically. The analytic results and the numerical simulations show that the application

The purpose of this paper is to illustrate the problem of energy and momentum distributions of Van Stockum space-time within the framework of two different theories of gravity, general relativity and teleparallel gravity. We have shown that for all homogeneous space-times with metric components \(g_{\mu \nu }\) being functions of time variable, t, alone and independent of space variables the total

The diurnal variation of GPS-TEC data recorded at the low-latitude station Agra (Geograph. lat. 27.2°N, long. 78°E) has been analyzed for a period of 9 years between 2007 and 2018 to examine whether the ionospheric perturbations are caused by low-magnitude earthquakes (M < 5) and if so, what may be the spatial scales of perturbations in such cases. The results show that low-magnitude earthquakes also

We perform a first-principles calculation to understand the effect of the additional valence electron of the transition atom in Wyckoff position 4 a, on the electronic structure, magnetic and structural stability of the full Heusler \({\mathrm{Mn}}_{2}\mathrm{PtZ}(\mathrm{Z}=\mathrm{V and Co})\) compound. L21, Xa and tetragonal structures are considered to verify the most stable phase. Within the framework

The electrostatic ion acoustic (IA) nonlinear periodic (cnoidal) waves are studied in a magnetized plasma comprising of cold ions and Cairns distributed electrons. By employing reductive perturbation technique (RPT), the nonlinear Korteweg-de Vries (KdV) and modified KdV (mKdV) equations are derived, and their cnoidal wave (CW) solutions are obtained. For a given set of plasma parameters, the present

The first-principles calculations have been applied to investigate the impact of Fe impurity on the electronic, magnetic, and optical properties of graphene-like InAs and compare the results. The calculations have been accomplished through the full-potential augmented plane wave technique in the density functional theory framework using WIEN2k computational software. The band structures, density of

Present Paper describes analysis of GPS-data recorded at low latitude station Hyderabad (Geographic latitude 17\(^\circ \), 25′ N, longitude 78\(^\circ \), 33′ E), India to study the effect of magnetic activity on ionospheric TEC. The total electron content (TEC) data were considered for the ionosphere during five most quiet and most disturbed days for each month of the solar minimum year 2009 and

This paper reports the numerical simulations on buoyant thermal transfer inside the finite porous cylindrical annular region with a thin circular baffle attached to inner cylinder. The main objective of this investigation is to provide a detailed impact of baffle on flow and heat transport rates due to the direct relevance of this problem to the design of heat exchangers. The side walls of annular

Antiferromagnetism and d-wave superconductivity are the most important competing ground-state phases of cuprate superconductors. In this regard, we have proposed a model Hamiltonian describing the interlayer tunnelling in d-wave bilayer cuprate superconductors in the coexistence of superconductivity and antiferromagnetism. The Hamiltonian model is solved for the quasiparticle energy bands, the superconducting

In the present study, various solar and atmospheric parameters, namely solar radiation, surface ozone, relative humidity, air temperature, and wind speed, have been studied first time for the annular solar eclipse of June 21, 2020, at seven Indian stations simultaneously. All the seven different stations are selected along the solar eclipse path having the maximum eclipse magnitude of 92% and above

The main goal of the present study is to analyze and estimate the plasma screening effect on excitation energies O-like ions and photoionization process of F-like ions under the influence of strongly coupled plasma. We have employed an ion sphere model (ISM) in flexible atomic code (FAC) to study and analyze plasma effect in atomic structure of O-like ions and photoionization of F-like ions. We have

Using the linearized Vlasov–Maxwell model and the polarization tensor components for weakly magnetized (\(\left| \omega -{\mathbf {k}}\cdot {\mathbf {v}}\right| >\varOmega \)) electron plasma the dispersion relations of parallel and perpendicular propagating electromagnetic modes are evaluated under high frequency/long wavelength limit (i.e., \(\omega >{\mathbf{k }}\cdot {\mathbf{v }}\)). The propagation

LiPbB5O9:Eu3+ phosphors were synthesized via solid-state reaction technique and studied various properties. For the prepared LiPbB5O9:Eu3+ phosphors, structural and spectroscopic characterizations were performed. Crystallinity nature of LiPbB5O9:Eu3+ phosphors was investigated from X-ray diffraction (XRD) analysis. Functional group investigations and maximum phonon energies of LiPbB5O9:Eu3+ phosphor

In the framework of the first Born approximation, we investigate, in the presence of a circularly polarized electromagnetic laser field, the double effect of Coulomb and anomalous magnetic moment (AMM) on the scattering of electron by a fixed atomic nucleus. In this approximation, the initial and final states of the electron are described by the relativistic Coulomb Dirac–Volkov wave functions with

Based on the full-potential linearized augmented plane wave (FP-LAPW) method, we have investigated the electronic, structural, magnetic and optical properties of Cd0.9375TM0.0625S (TM = Mn, Fe, Co and Ni) compounds in the zinc-blende (ZB) ferromagnetic phase. The magnetic and electronic properties are treated using the PBE-GGA and TB-mBJ approximations. CdS is well known as a non-magnetic semiconductor

The electronic structure and optical properties of AgIn1−xGaxY2 (Y = Se, Te) are investigated using first-principles calculations based on density functional theory. Both the local density approximation (LDA) and generalized gradient approximation (GGA) are employed in the calculation. The crystal structure of ternary semiconductors is the tetragonal chalcopyrite structure with space group \({\text{I}}\overline{{4}}

This research study is focused on to investigate the seasonal, temporal and spatial variations of aerosol optical depths (AODs) over various major cities in South-West region of India and further to understand the impact of aerosols on cloud microphysics. AOD at 550 nm derived from the MODIS sensors have been analyzed in the present study for the ten-year period of 2003–2012. The retrieved satellite

Here, we investigate an enzymatic reaction system subjected to additive and multiplicative noises and a weak periodic signal. By means of numerical simulations, we find that structure of stationary probability distribution function changes from one peak to two peaks by regulating not only the noise intensities (i.e., noise-induced transition), but also system parameters. The mean first passage time

The present investigation is concerned with the study of two-dimensional deformation in an infinite semiconducting plate of uniform thickness bordered with inviscid liquid half-spaces. The plate is under the influence of the mechanical force of constant magnitude. The analytical expressions of displacement components, stress components, temperature distribution, and carrier density are obtained by

The nonlinear heat conduction equation can be solved by quantum modified heat transfer coefficient in deuterium–tritium (DT) plasma driven by laser above the critical electron temperature. As a result, the electron profile temperature and the heat flux solutions are improved. In this paper, we have studied the subsequent modification of ion temperature due to ion heating by energy transfer between

In a bid to resolve lingering problems in cosmology, more focus is being tilted towards cosmological models in which physical constants of nature are not necessarily real constants but vary with cosmic time. In this paper, we study a cosmological model in nonlinear electrodynamics with Newton’s gravitational constant G, which is not a constant but varies in terms of a power law of the scale factor

In this paper, a theoretical method is presented to calculate Brillouin linewidth (BLW) in gas mixtures. The presented model is based on Newton's viscosity law and the kinetic theory of gases. From a combination of Chapman–Enskog theory and Navier–Stokes mathematical model, we recovered the appropriate terms of the viscosity tensor for gas mixtures. We demonstrated that viscosity is not necessarily

The dielectric and percolation behavior of polymer nanocomposites (PNC) comprising of polyvinylidene fluoride (PVDF)/nanocrystalline nickel (n-Ni) [conducting filler] and PVDF/n-BaTiO3 [ferroelectric insulating filler], prepared under the novel cold press method are compared. Higher effective dielectric constants (ɛeff) of 2400 and 400 at 40 Hz with volume fractions of filler fcon = 0.28 and \(f_{{{\text{BaTiO}}_{3}

Doping plays a vital role in tuning the carrier concentration and also influences various electronic properties in semiconductors. In addition to tuning the electronic properties of semiconductors, impurities also affect vibrational properties. We report the local vibrational modes (LVMs) in N-doped n-type 6H-SiC. New phonon modes are observed in the low-temperature range. Unlike lattice phonons, LVMs

We propose a scheme to directly measure the entangled W states with cross-Kerr nonlinearity mediums. We find that a well-designed structure can measure three-photon, four-photon and even N-photon W states in one step. Only PBSs and cross-Kerr nonlinearity mediums are used in this scheme, which is feasible for experiments. We explore the measurement of the three-photon W states and extend it to four-photon

The magnetoelectric effect in YFeO3 multiferroic was studied via Monte Carlo simulation. The variation of magnetization and polarization of YFeO3 versus temperature was determined. The magnetic transition at transition temperature TC and ferroelectric transition at TF are obtained. Magnetic hysteresis cycles and loops are established. The magnetic coercive field and remanent magnetization decrease

Delhi experiences frequent dust storms during the pre-monsoon season. We studied one such event that occurred on May 30th, 2014 at New Delhi to understand the changes in the optical properties of aerosols. The present study utilizes the aerosol optical depth (AOD) from the ground and satellite measurements along with reanalysis data. The aerosol characteristics were examined during the pre-week and

The purpose of this work is to investigate the optical constants of ZnO films doped by Cu, Al, and Cu-Al nanoparticles. The reflectance and the transmittance spectra measurements were applied for calculating these optical constants in the range of 200–2500 nm. It can be seen that ZnO films doped with Al nanoparticles have a maximum value nanoparticles size of about 23.73 nm. With increasing annealing

In the present work, we search a new exact solution of Einstein’s field equations using Karmarkar condition of embedded class one space time. The new solution is analyzed graphically as well as analytically to check its viability for compact star modeling. The different parameters of the solution are ascertained by matching the interior space time metric with the Schwarzschild’s exterior space time

In this paper, a Schottky barrier double gate impact ionization metal oxide semiconductor (SBDG-IMOS) transistor with reduced subthreshold swing (SS), gate threshold voltage (VGT), and operational voltage (VOp) is introduced. The proposed transistor benefits from approximately one order of magnitude ON current enhancement with ON/OFF current ratio of 1.3 × 107 verified by device simulations. Using

The polycrystalline compound La0.4Bi0.6Mn0.99Ga0.01O3 has been studied for its interesting structural, magnetic and electrical transport properties. The compound has been synthesized using nitrate reaction route with the incorporation of controllable temperature cycling method. The phase purity of the studied compound has been verified from the X-ray diffraction and Reitveld refinement technique/analysis

The Dynamics of the Belousov-Zhabotinsky (BZ) coupled map lattice (CML) was studied as a model of spatiotemporal pattern. The systematical change of coupling strength and bifurcation parameter led to the shifts in the patterns of the BZ CML. The phase diagram of the BZ CML was different from that of the logistic CML. The phases, such as fully developed turbulence, pattern competition intermittency

The main objective of the present article is to conduct an entropy generation analysis on a wall-driven mixed convection copper–water nanofluid flow in an inclined channel filled with a porous medium while considering Hall effect. The permeability of the porous medium is assumed to vary exponentially across the width of the channel, while viscous dissipation and convectively heated walls are also taken

The first excited 2+ energy states of nuclei give much substantial information related to the nuclear structure. All excited states of nuclei are shown regularities in spin, parity, and energy, including these levels. In the even–even nuclei, the first excited state is generally 2+, and the energy values of them increase as the closed shells are approached. The nuclei’s excited levels can be investigated