In this paper, we investigate the stability of equilibrium in stage-structured and density-dependent predator–prey system with Beddington–DeAngelis functional response. First, by checking sign real part for eigenvalue, local origin boundary are studied. Second, explore positive τ=0 τ≠0 (time delay τ is time taken from immaturity to maturity predator), which shows that dependent on parameter τ. ...

functional response of stethorus gilvifrons mulsant to varying densities of different developmental stages of eutetranychus orientalis klein was examined in a simplified castor bean leaf disc arena under the laboratory condition. one s.gilvifrons female was isolated individually for 24h with different prey densities (4,8,12,24,48,96,120) at 300c and photoperiod of 14:10 (l:d) h. the number of p...

Functional data often arise from measurements on fine time grids and are obtained by separating an almost continuous time record into natural consecutive intervals, for example, days. The functions thus obtained form a functional time series, and the central issue in the analysis of such data consists in taking into account the temporal dependence of these functional observations. Examples incl...

Controlling the magnetic properties of ultrathin films remains one main challenges to further development tunnel magnetoresistive (TMR) device applications. The response in such devices is mainly governed by extending primary TMR trilayer with use suitable contact materials. transfer anisotropy ferromagnetic electrodes consisting CoFeB layers results a field-dependent response, which determined...

We have investigated photosensitizing properties for porphrazine and eleven of its related derivatives based on time-dependent density functional theory (TD-DFT) calculations. The modles have been divided into two categories based on the existence of CN functional group in one category but not in the other one. The other functional groups include H, CH3, F, CF3, C6H5, and C6F5 counterparts. The...

ignoring two main characteristics of the concentration-response data, correlation between observations and presence of outliers, may lead to misleading results. therefore the special method should be considered. in this paper in to examine the effect of phenylephrine in rat corpus cavernosum, outlier robust nonlinear mixed estimation is used. in this study, eight different doses of phenylephrin...

linear dynamic response of simply supported nanobeams subjected to a variable axial force is assessed by galerkin numerical approach. constitutive behavior is described by three functional forms of elastic energy densities enclosing nonlocal and strain gradient effects and their combination. linear stationary dynamics of nanobeams is modulated by an axial force which controls the global stiffne...