Let P (z) be a polynomial of degree n and M(P, t) = Max|z|=t |P (z)|. In this paper we shall estimate M(P ′ , ρ) in terms of M(P, r) where P (z) does not vanish in the disk |z| ≤ K, K ≥ 1, 0 ≤ r < ρ < K and obtain an interesting refinement of some result of Dewan and Malik. We shall also obtain an interesting generalization as well as a refinement of well-known result of P. Turan for polynomial...

Respiratory disease conditions continue to cause heavy economic losses in the poultry industry. They are usually caused by viral, bacterial, mycotic or parasitic agents and the course of the diseases can be influenced by environmental conditions and management failure (JOUBERT et al., 1999). At the beginning of 90`s bacteriological examinations from turkeys and chickens suffering from respirato...

The several refugee crises, the continuous degradation of the environment, and the nativism of some influential religious and political sectors are bringing about a new era of activism in some sectors of society. Given the deep-time perspective, the international nature of palaeontology, the exposure through field work and museum visits to intercultural exchanges in different geographic setting...