Let θ(n) denote the number of compositions (ordered partitions) of a positive integer n into powers of 2. It appears that the function θ(n) satisfies many congruences modulo 2 . For example, for every integer a there exists (as k tends to infinity) the limit of θ(2 + a) in the 2−adic topology. The parity of θ(n) obeys a simple rule. In this paper we extend this result to higher powers of 2. In ...

Despite significant advances in the access control domain, requirements of new computational environments like web services still raise new challenges. Lack of appropriate method for specification of access control policies (ACPs), composition, verification and analysis of them have all made the access control in the composition of web services a complicated problem. In this paper, a new indepe...

A perfect algebraic immune function is a Boolean function with perfect immunity against algebraic and fast algebraic attacks. The main results are that for a perfect algebraic immune balanced function the number of input variables is one more than a power of two; for a perfect algebraic immune unbalanced function the number of input variables is a power of two. Also the Carlet-Feng functions on...

Objective(s)This study was designed to evaluate the effect of Ramadan fasting on body composition, aerobic and anaerobic power, strength, plasma lipids profile and serum glucose among collegiate wrestlers.Materials and Methods Fourteen male collegiate wrestlers (age, 20.12±2.5 yrs) volunteered as subjects for the study. Subjects were tested one week before the beginning of Ramadan, the last two...

modifications in fat and fatty acid composition of silver carp that take place at each stage of canning process (precooking and sterilization) were evaluated. results showed, precooking led to decrease total fat and increase conjugated dines. the amounts of free fatty acids and thiobarbituric acids had no changed during precooking but these compounds like conjugated dine were increased after st...