We prove stability of the isolated eigenvalues of transfer operators satisfying a Lasota-Yorke type inequality under a broad class of random and nonrandom perturbations including Ulam-type discretizations. The results are formulated in an abstract framework.

The HI and SN titers produced by V2 (Laso ta Vaccine, chick-embryo origin) were more than VI (TCND) and V3 (Lasota tissue culture origin) vaccines. High percentage (96,%, 93,% & 90,%) of the three subgroup hens, when vaccinated with VI, V2 and V3 respectively, were found resistant to contact exposure challenge with 2 x 10 6 ELD 50 of virulent NDV Zabol strain. The egg production dropped slightl...

Background: Newcastle disease virus (NDV) genotype VII has become the dominant genotype in China. However, NDV genotype II was used to make current commercial NDV vaccines. The mismatch of genotypes between circulating and vaccine strains of viruses may compromise the efficacy of vaccines. Methods: In this study, a current circulating NDV was attenuated by mutations of multiple basic amino acid...

By means of Mawhin’s continuation theorem of coincidence degree theory, some new and simple sufficient conditions are obtained for the existence of at least one positive almost periodic solution for a class of delayed Lasota-Wazewska model with nonnegative coefficients. Further, by some important inequalities and Lyapunov functional, the permanence and global asymptotical stability of the model...

We introduce a notion of conditional memory loss for nonequilibrium open dynamical systems. We prove that this type of memory loss occurs at an exponential rate for nonequilibrium open systems generated by one-dimensional piecewise-differentiable expanding Lasota-Yorke maps. This result may be viewed as a prototype for time-dependent dynamical systems with holes.

Abstract This study is about getting some conditions that guarantee the existence and uniqueness of weighted pseudo almost periodic (WPAP) solutions a Lasota–Wazewska model with time-varying delays. Some adequate have been obtained for WPAP model, which we dealt using differential inequalities, theory, Banach fixed point theorem. Besides, an application given to demonstrate accuracy our main re...

Penelitian ini bertujuan untuk mengetahui tingkat proteksi vaksin aktif tetelo atau Newcastle Disease (ND) strain Lasota (Sanavac ND LS) terhadap tantangan virus velogenik isolat lapang. Sampel penelitian sebanyak 60 ekor ayam Spesific Pathogen Free (SPF) yang dipelihara sejak umur sehari (day old chick=DOC) dibagi menjadi empat kelompok. Kelompok I divaksin dengan A melalui tetes mata, kelompo...