The objective of this paper is to determine the erosion susceptibility areas and evaluate their relationship with land cover in Datça and Bozburun Peninsulas. The research area is located in the southeast of Turkey in the Mediterranean Basin which is one of the 36 biodiversity hotspot areas in the world. RUSLE method was applied to determine amount of soil loss in the study. It was determined that

One of the important problems of environmental gamma-ray spectrometry is the correction of background radiation. Part of the background radiation passes through the sample into the container before entering the detector, and some of them are absorbed or scattered by the sample material, so it is necessary to make corrections to increase the measurement accuracy. The P-type coaxial high-purity germanium

Ghabaghloujeh gold deposit is located in the Sanandaj-Sirjan Zone and is hosted by NE-trending ductile shear zones and younger brittle fractures. The hydrothermal alteration zones are fairly developed within and around the lenticular intrusive body. Since the vegetation coverage is low, multispectral remotely sensed data of ASTER employed to extract the alteration zones; which might vector mineralized

In this paper, we analyze the complexity of an eco-epidemiological model for phytoplankton–zooplankton system in presence of toxicity and time delay. Holling type II function response is incorporated to address the predation rate as well as toxic substance distribution in zooplankton. It is also presumed that infected phytoplankton does recover from the viral infection. In the absence of time delay

In this work, we investigate a virus model with time delay and function of general incidence. We illustrate the solvability through solutions for the model. Using Lyapunov functionals, we prove that if the basic reproduction number \(R_0 \le 1\), then the infection-free equilibrium is globally asymptotically stable, and when \(R_0 > 1\), the infection will persist by the global asymptotic stability

The present paper investigates and develops a new technique based on the Chebyshev cardinal functions for solving fractional optimal control problems of a spring-mass-viscodamper system involving the Caputo–Fabrizio fractional operator. Through the way, the new operational matrix of Caputo–Fabrizio fractional operator is achieved for Chebyshev cardinal functions. Moreover, we apply a direct approach

In this paper, we study the estimation of the stress–strength reliability model when the stress and the strength variables are modeled by two independent but not identically distributed random variables from the generalized inverted exponential distributions. The stress strength reliability estimator is considered using, mainly, median ranked set sampling (MRSS) compared to ranked set sampling (RSS)

We report on femtosecond (130 femto second) laser pulse removal and modification in Copper Boron Oxide thin films (CuBO2) deposited on silicon substrate. The samples were irradiated with 100 to 500 number of laser pulses at room temperature. Micro-size constructions on the surface of exposed CuBO2 thin films were produced and was observed using Scanning Electron Microscope (SEM). Self-prepared shapes

We construct the Baskakov–Kantorovich operators based on shape parameter \(\alpha\) by linking with Stancu operators to approximate functions over unbounded intervals. We establish local approximation results with the help of suitable modulus of continuity, \({\mathcal {K}}\)-functional and Lipschitz-type space. Further, we obtain the weighted approximation properties and calculate the rate of convergence

In the present work, we employ the new concept of weighted piecewise pseudo almost automorphic functions and study the impulsive Mackey–Glass model with mixed delays and nonlinear harvesting term. First, we give essential lemmas and some composition theorems related to the considered space. Second, by a suitable fixed-point theorem and the properties of the weighted piece-wise pseudo almost automorphic

The nonlinear optical properties of chlorophyll B dissolved in chloroform have been studied using single-beam z-scan technique with a CW Laser at wavelength λ = 635 nm. It was found that the chlorophyll B has a large 3rd nonlinearity. The nonlinear absorption coefficient β and the nonlinear refractive index n2 were estimated from fitting of the experimental data, which was found to be proportional

Let S be a unital ring in which 2 is invertible, and let \(R=H(S)\) be the quaternion ring over S. In this paper, we characterize the generalized derivations of R and show that every generalized Jordan derivation on R is a generalized derivation. We also consider the question when a derivation (generalized derivation) of a quaternion ring is an inner derivation (generalized inner derivation). In addition

In this study, we used the combination of gamma ray spectroscopy and full spectrum analysis method to calculate the radioactivity concentrations of 40K, 232Th and 226Ra radioisotopes in the building materials. The activities of 40K, 232Th and 226Ra were between (36.79 and 559.82), (1.29 and 36.01) and (1.20 and 32.62) Bq kg−1, respectively. The absorbed dose rate in air (D), the annual effective dose

This study investigates the effect of high pressure on the phonon frequency spectrum of silicon nanoparticles with two different diameters, 4.1 nm and 10.3 nm. The equations of state of Suzuki and Birch–Murnaghan were used to evaluate the volume compression ratio. It was found that the high pressure effects depend significantly on the particle size that was under consideration. The 4.1-nm particle

This paper deals with the dynamics of a prey dependent three species food chain model involving the Holling type II response function elucidating the impact of refuge constants of prey and predator on the system. We present an exhaustive mathematical explanation of the suggested model to enhance the significance which has originated due to ecological phenomena. Biologically meaningful equilibrium points

In this article, solvability of infinite system of nonlinear singular integral equations of two variables in Banach sequence spaces \(c_{0}\) and \(\ell _{1}\) is investigated. For this purpose, Hausdorff measure of noncompactness (in short, Hausdorff MNC) and Meir–Keeler condensing operators are employed. The guarantee of our results are given by some examples. Also to approach an approximation of

Hand, foot and mouth disease is a common viral infectious disease caused by enteroviruses, including coxsackie A16 (CVA16) and enterovirus 71 (EV71). HFMD can cause severe symptoms in children which can be fatal. Human scavenger receptor class B member 2 (SCARB2) is a cellular receptor for EV71 and CVA16, providing a potential approach for preventing EV71 infection and transmission. In this present

For hundreds of years, people have used honey, and still are using it, as a natural sweetener and for its multiple health benefits. The quality of honey may be altered by several factors among which processing, storage conditions and falsification. The present study focusses mainly on the characterization of the physicochemical properties of nineteen Algerian honeys belonging to different localities

In this paper, we propose the numerical scheme for solving nonlinear higher multi-order Caputo fractional differential equations with integral and antiperiodic boundary conditions, establish the existence of an approximate solution to our problem, and prove the convergence of our numerical method. The operational matrix of fractional integration based on hat functions is used to solve the given problem

This paper is concerned with numerical solution of time fractional stochastic advection-diffusion type equation where the first order derivative is substituted by a Caputo fractional derivative of order \(\alpha \) (\(0 <\alpha \le 1\)). This type of equations due to randomness can rarely be solved, exactly. In this paper, a new approach based on finite difference method and spline approximation is

Mixture models are promising statistical tools aiming to modeling and clustering data arisen from a heterogeneous population. This paper presents a mixture model based on the assumption that the mixing components follow the multivariate restricted skew-normal scale mixture of Birnbaum–Saunders (SNBS) distributions. A computationally feasible expectation-maximization algorithm is developed to carry

Lead and zinc ores are the most important natural raw materials widely used in the industry. These types of ores contain different amounts of radionuclides that expose workers to radiation during extraction, transport, and processing. In this study, 22 samples were collected, including 18 samples of lead–zinc ore and 4 samples of mining waste. Specific activities of 226Ra, 232Th, and 40K were determined

Background Glioblastoma multiforme (GBM) is a highly aggressive and poor prognosis brain tumor with about 12- to 18-month median survival period and high mortality rate in human. Glioma cells are able to disseminate and migrate far away from the primary tumor and display treatment resistance. Therefore, upgrading our knowledge regarding the genetic aspects of GBM and also applying a safe and promising

Morus alba L. (Mulberry) is an economic and medicinal tree, originated from the Himalaya region and gradually spread all over the world. Most of the recently developed mulberry varieties have similar narrow genetic base and limited capacity against environmental stress and pathogens. To enhance the species resistance, we need to increase genetic diversity of its varieties using higher genotypes differentiation

Type 2 diabetes mellitus is a chronic metabolic disorder which is mainly correlated to hyperglycemia, hyperlipidemia, oxidative stress, and protein glycation. Bioactive compounds from herbal resources suggest a dietary approach for diabetes management by inhibiting carbohydrate-degrading enzymes and biomolecules oxidation. The anti-diabetic activities and amino acids composition of four medicinal plants

In this study, human skin fibroblasts human dermis fibroblasts were used as the object, the possible effects and mechanisms of rosemary extract on repeated exposure to Ultraviolet A (UVA) induced senescence of human skin fibroblasts were investigated. During the research, we mainly carried out through two parts. The first part mainly explores the effect of repeated UVA radiation on human skin fibroblasts;

The kinetics of oxidation of methylene blue with potassium bromate was investigated by observing decolorization of methylene blue in aqueous, aqueous methanol and aqueous isopropanol solvent system. The rate of reaction was studied as function of concentrations of methylene blue and potassium bromate in acidic medium at temperature 303 and 313 K. The increase in concentration of potassium bromate enhances

A Roman dominating function (or just RDF) on a graph \(G =(V, E)\) is a function \(f: V \longrightarrow \{0, 1, 2\}\) satisfying the condition that every vertex u for which \(f(u) = 0\) is adjacent to at least one vertex v for which \(f(v) = 2\). The weight of an RDF f is the value \(f(V(G))=\sum _{u \in V(G)}f(u)\). An RDF f can be represented as \(f=(V_0,V_1,V_2)\), where \(V_i=\{v\in V:f(v)=i\}\)

Cancer is a disorder that results in abnormal and irregular proliferation of cells in the organ or tissue of the body. In Turkey flora, there are many medicinal plants that have great therapeutic importance. Rhaponticoides iconiensis is endemic to Turkey. In the present study, the methanol extracts and sub-extracts of leafy stem and flowers of R. iconiensis were evaluated for cytotoxic activity against

Cellulose is one of the most common biopolymers on earth with well-known non-toxic, biocompatible, and environmentally friendly properties. Structural and chemical properties of cellulose fibers give additional opportunities for surface modification of cellulose and its use as a carrier for immobilization of various bioactive compounds, including enzymes. For the proposes of horseradish peroxidase

In this article, we have presented an infected predator-prey model with Holling type II functional response where the predator population is divided into two sub-classes, namely susceptible and infected due to disease. Here, we have assumed that the fear induced by susceptible and infected predators are of different levels. Well-posedness of the model system along with persistence criterion and the

One of the important problems in the statistical shape analysis context is to predict the shape change. Rather than taking the change in terms of time, we confine ourselves to the deformation of the objects represented by a regression-type model. We properly combine the shape definition in terms of the Kendall and Bookstein shape coordinate systems to break down the problem on the sphere. This is achieved

A heterojunction field effect transistor has been studied by a model run self-consistently from the solution of the Schrödinger equation coupled with Poisson equation. The properties of the device drain current, the band structure of device, and the charge distribution have been obtained because of material composition. The efforts have shown that unique reason of having the high carrier concentration

In this paper, we propose an efficient method to approximate bivariate functions by Szász–Mirakjan operators via Dunkl generalization. More precisely, we generalize the Dunkl formation of Szász–Mirakjan operators by introducing the exponential functions and obtain the approximation by means of well-known Korovkin’s theorem, modulus of continuity, Lipschitz functions and Peetre’s K-functional. Next

Salvia limbata C.A. Meyer (Lamiaceae) is an aromatic medicinal herb growing wild in various parts of Iran. In the current study, variations in the trichomes morphology and density, and composition of the hydro-distilled obtained essential oils of eight wild S. limbata populations were assessed. Essential oil yield showed a high degree of variability among the populations. The major constituents of

Two-parameter ridge regression is a widely used method in the last two decades to circumvent the problem of multicollinearity. Ridge parameter k plays an important role in such situations. Several methods are available in the literature for the estimation of ridge parameter. For high multicollinearity, the available methods do not perform well in terms of mean square error. In this article, we propose

The corrosion behavior of copper in 1 M HCl in the absence and presence of Hha ((E)-2-hydroxy-5-(2-benzylidene) aminobenzoic acid) has been investigated experimentally and computationally. In this way, the electrochemical behavior of copper was studied in 1 M HCl and 1 M HCl + x M Hha solutions under different temperatures. Electrochemical techniques were used. In addition to the laboratory methods

Ketotifen fumarate, a mast cell stabilizer, and salbutamol sulfate, a bronchodilator, are frequently prescribed together for chronic asthma. This study aimed to combine both anti-asthmatic drugs in single polymeric responsive matrix type transdermal patches. Drug release from polymeric device was optimized by varying ratios of hydrophilic (polyvinyl pyrrolidone) and hydrophobic (ethyl cellulose) polymers

The present paper reports a study on the dependence of tropospheric ozone on some of its precursors, namely NOx, PM10, and SO2 during summer monsoon over a highly polluted Kolkata region megacity of India. The intrinsic multicollinearity has been explored through Bartlett’s sphericity test. Subsequently, principal component analysis has been implemented to identify the principal components with maximum

The physical characteristics of a shape memory alloy can be controlled by different production techniques and the rate of constituents’ contribution. In this study, CuAlNiHf shape memory alloys, with three different amounts of Hf, were produced by the induction melting method. Many measurements such as differential scanning calorimetry (DSC), scanning electron microscope, energy dispersive X-ray, and

Recently, Peyghami et al. (Optim Meth Soft 43:1–28, 2015) proposed a modified secant equation, which applied a new updating Yabe and Takano’s rule as an adaptive version of the parameter of conjugate gradient. Here, using this modified secant equation, we propose a new modified descent spectral nonlinear conjugate gradient method. The proposed method includes two major features; the higher-order accuracy

We show that every topological group is a strong small loop transfer space at the identity element. This implies that for a connected locally path connected topological group G, the universal path space \(\widetilde{G}_{e}\) equipped with the quotient topology induced by the compact-open topology on P(G, e) is a topological group. Moreover, we prove that there is a one-to-one correspondence between

In this paper, a numerical model for prediction of hydrodynamic non-circular journal bearings considering misalignments is proposed. The misalignment effects on non-circular hydrodynamical journal bearings are studied. For analyzing journal’s hydrodynamic film, the LBM method, instead of prevalent CFD methods, has been used; since the LBM method has local behavior, it is suitable for parallelization

Uranium concentration in the groundwater samples from the district of Tiruvannamalai, Tamil Nadu, was measured using an LED fluorimeter. Grid sampling technique was used for the collection of water in the study area. The basic physical parameters of water such as EC, TDS and pH were also determined and their levels have been compared with standard limits. All the samples qualified as potable water

Increased activities of enzymatic and non-enzymatic antioxidants provide a common reaction to environmental stress in most crops. To investigate the effect of foliar application of stress moderators on enzymatic and non-enzymatic antioxidant changes, field experiments were conducted as split-plot design based on a randomized complete block design with three replications in 2017 and 2018. Planting date

This study explores the fabrication of hematite (α-Fe2O3) nanoparticles utilizing aqueous extracts of Plectranthus amboinicus, which act as reducing and stabilizing agents. The prepared hematite (α-Fe2O3) nanoparticles have been characterized by TGA, PXRD, FT-IR, Raman, DRS UV–visible, Photoluminescence, SEM, Particle size distribution, and zeta potential measurements (DLS), respectively. According

The aim of this paper is to show that a supercritical Neumann problem has at least one positive radial solution via recent variational principle and defining an energy functional with a hidden symmetry associated with the problem. Also, we study the problem in the setting of the Heisenberg group \({\mathbb {H}}^n\), which is a special case of locally compact groups.

The LSQR iterative method is a Krylov subspace method for solving least-squares problems. Early termination is rare, and it is common for LSQR to require many iterations before an approximation of the solution with desired accuracy has been determined. In this paper, we present a restarted LSQR method and we use a new technique for accelerating the convergence of restated by adding some approximate

Habitat-associated morphological divergence of the three-spined stickleback, Gasterosteus aculeatus populations was investigated in the southern Caspian Sea basin using landmark-based geometric morphometric method to understand the population structure of this invasive species. A total of 127 specimens were collected from three stations, including the Babol River estuary (center), Gomishan Wetland

Providing strategies for coping and managing NaCl salinity stress is the goal of many researches. Titanium dioxide nanoparticles (TiO2 NPs) are widely used as photo-catalytic agents due to their strong oxidative properties, optical stability, lack of toxicity, cheapness and availability. Here, the effects of various concentrations of NaCl salinity and titanium dioxide nanoparticles on certain growth

Microwave dielectric ceramics in the Ca1-xSrxTiO3 (0 ≤ x ≤ 0.7) composition series were fabricated via conventional solid state, mixed oxides route. The structural, microstructural and microwave dielectric properties of the sintered samples were investigated. The XRD patterns revealed the formation of a single-phase perovskite-structured compositions calcined at 1000 °C for 3 h in air. The structure

Background Researches implement microcantilevers (MCs) as a biosensing technique lately. Various researches develop such platforms experimentally. Herein, simulation is the method of the choice to predict accurate response of the biosensor during design. Objective The current study aims to provide a prediction method that enables adequate response order. Such results enable the enhanced design of the

In the present paper, we describe cubic spline combined with high accuracy compact formulation for computing approximate solution values to nonlinear convection-dominated diffusion equations, and apply the method to several variants of Burger’s type parabolic partial differential equations. A combination of cubic spline interpolating polynomial and quasi-variable grids sequence yields a two-level implicit

Utilizing the concepts of subordination we have introduced a generalized class Salagean-Type of complex-valued multivalent harmonic functions. We construct some properties of our class. The results obtained here include a number of known and new results as their special cases.

In this paper, we propose a numerical technique based on the method of fundamental solutions (MFS) for solving a classical optimal shape design problem. The problem contains a free boundary condition which should be approximated to find the optimal domain for the solution of Laplace equation. For solving the considered optimization problem, we introduce a meshless regularization technique based on

Imidazolium-based ionic liquids 1-hexyl-3-methylimidazolium hexaflorophosphate, and 1-hexyl-3-methylimidazolium tetrafloroborate were used to determine pH dependent-ionic forms of Valine and Aspartic acid in aqueous solutions. For this purpose, the partitioning behaviors of both compounds between the aqueous phase with different pH values and ionic liquid phase were investigated. The results revealed

In Southern and Southern East Asia, the eggplant fruit and shoot borer (BSFB) is the most harmful pest for eggplant. The pest is known to cause about 16 and 70% damage to shoots and fruits, respectively. It is of practical importance to precisely trace the genetic variability in the expanding geographical distribution of the pest. In the current study, the genetic variability was analysed among geographically

This article deals with a class of non-smooth mathematical programming with vanishing constraints. We introduce several kinds of constraint qualifications for these problems, and we study the relations between them. Then, we apply these constraint qualifications to obtain several stationary conditions. Finally, a sufficient condition for optimality of the problem is presented.