Investigation on structure and dynamics of natural forest ecosystems is an important issue for silvicultural decisions. The aim of this study is to analysis dynamics and structure of a beech stand during 5-year period in the Shast Kalateh forest in the Caspian region, North of Iran. Data were collected from a 16.9ha permanent research plot established in a natural unlogged stand in 2006. All li...

We investigate the asymptotic fluctuation of three interacting particle systems: geometric q -TASEP, -PushTASEP and -PushASEP. prove that rescaled position converges to GUE Tracy–Widom distribution in homogeneous case. If jump rates first finitely many particles are perturbed two models, we obtain limiting fluctuations governed by Baik–Ben Arous–Péché top eigenvalue finite matrices.

We investigate the asymptotic fluctuation of three interacting particle systems: geometric q -TASEP, -PushTASEP and -PushASEP. prove that rescaled position converges to GUE Tracy–Widom distribution in homogeneous case. If jump rates first finitely many particles are perturbed two models, we obtain limiting fluctuations governed by Baik–Ben Arous–Péché top eigenvalue finite matrices.

The aim of this study is to estimate the prevalence of Toxoplasma gondii infection in 527 sheep from 4 governorates of Tunisia by Elisa (350 animals) and PCR (177 animals). The seroprevalence in sheep was estimated to be 1.8% (N = 166) in the governorate of Siliana (North Tunisia) and 19% (N = 184) in the governorate of Kasserine (Central Tunisia) with a commercial Elisa kit. T. gondii DNA was ...

investigation on structure and dynamics of natural forest ecosystems is an important issue for silvicultural decisions. the aim of this study is to analysis dynamics and structure of a beech stand during 5-year period in the shast kalateh forest in the caspian region, north of iran. data were collected from a 16.9ha permanent research plot established in a natural unlogged stand in 2006. all li...

We give simple criteria to identify the exponential order of magnitude absolute value determinant for wide classes random matrix models, not requiring assumption invariance. These include Gaussian matrices with covariance profiles, Wigner and subexponential tails, Erd\H{o}s-R\'enyi $d$-regular graphs any polynomial sparsity parameter, non-mean-field such as band bandwidth. The proof builds on r...

We establish a simple criterion for locating points where the transition density of a degenerate diffusion is strictly positive. Throughout, we assume that the diffusion satisfies a stochastic differential equation (SDE) on R d with additive noise and polynomial drift. In this setting, we will see that it is often that case that local information of the flow, e.g. the Lie algebra generated by t...

Graph eigenvalues are examples of totally real algebraic integers, i.e. roots of real-rooted monic polynomials with integer coefficients. Conversely, the fact that every totally real algebraic integer occurs as an eigenvalue of some finite graph is a deep result, conjectured forty years ago by Hoffman, and proved seventeen years later by Estes. This short paper provides an independent and eleme...

In this paper the celebrated arcsine aging scheme of Ben Arous and Černý is taken up. Using a brand new approach based on point processes and weak convergence techniques, this scheme is implemented in a broad class of Markov jump processes in random environments that includes Glauber dynamics of discrete disordered systems. More specifically, conditions are given for the underlying clock proces...

We establish small-time asymptotic expansions for heat kernels of hypoelliptic Hörmander operators in a neighborhood the diagonal, generalizing former results obtained particular by Métivier and Ben Arous. The coefficients our are identified terms nilpotentization underlying sub-Riemannian structure. Our approach is purely analytic relies on local global subelliptic estimates as well nature asy...