The present study aimed to estimate the effects of parity, calving season and year of calving on the prevalence of subclinical mastitis in Holstein cows. A total of 2682 records from 869 Holstein cows in a large dairy farm (Azarbaijan province, Iran), respecting the period from 2006 to 2009, were collected. Data was analyzed using Proc Mixed of SAS software by MIVQUE method. Subclinical mastiti...

Abstract. Zero-sum problems on abelian groups, subset sums in a field and covers of the integers by residue classes, are three different active topics initiated by P. Erdős and investigated by many researchers. In an earlier paper [Electron. Res. Announc. Amer. Math. Soc. 9(2003), 51-60], the author announced some connections among these seemingly unrelated fascinating areas. In this paper we e...

Let 1 ≤ a1 < a2 < · · · < an ≤ 2n − 2 denote integers. Assuming that n is large enough, we prove that there exist ε1, . . . , εn ∈ {−1,+1} such that |ε1 + · · ·+εn| ≤ 1 and |ε1a1+ · · ·+εnan| ≤ 1. This result is sharp, and in turn it confirms a conjecture of Lev. We also prove that when n is even, every integer in a large interval centered at (a1 + a2 + · · · + an)/2 can be represented as the s...

in this paper, we obtain the general solution and the generalized  hyers--ulam--rassias stability in random normed spaces, in non-archimedean spacesand also in $p$-banach spaces and finally the stability viafixed point method for a functional equationbegin{align*}&amp;d_f(x_{1},.., x_{m}):= sum^{m}_{k=2}(sum^{k}_{i_{1}=2}sum^{k+1}_{i_{2}=i_{1}+1}... sum^{m}_{i_{m-k+1}=i_{m-k}+1}) f(sum^{m}_{i=1...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 introduction: there is not enough time for any organization to experience everything by itself but it is possible to compare its processes with other organizations in order to fulfill its functions effectively. the main aim of this research was to assess and compare discharge processes in ali-ebne abitaleb and quaem hospit...

a ring $r$ is a strongly clean ring if every element in $r$ is the sum of an idempotent and a unit that commutate. we construct some classes of strongly clean rings which have stable range one. it is shown that such cleanness of $2 imes 2$ matrices over commutative local rings is completely determined in terms of solvability of quadratic equations.

Signed digit (SD) number systems provide the possibility of constant-time addition, where inter-digit carry propagation is eliminated. Such carry-free addition is primarily a three-step process; adding the equally weighted SDs to form the primary sum digits, decomposing the latter to interim sum digits and transfer digits, which commonly belong to {&ndash;1, 0, 1}, and finally adding the tra...