Let X be an algebraic surface over an algebraically closed field k of characteristic p > 0. We denote by ΦX the formal Brauer group of X and by h = h(ΦX) the height of ΦX . In a previous paper, [6], we examined the structure of the stratification given by the height h in the moduli space of K3 surfaces, and we determined the cohomology class of each stratum. In this paper, we apply the methods ...

We introduce weighted moduli of smoothness for functions f ∈ Lp[−1, 1]∩Cr−1(−1, 1), r ≥ 1, that have an (r−1)st absolutely continuous derivative in (−1, 1) and such that φf (r) is in Lp[−1, 1], where φ(x) = (1−x). These moduli are equivalent to certain weighted D-T moduli, but our definition is more transparent and simpler. In addition, instead of applying these weighted moduli to weighted appr...

Over the centuries, information security has become a major issue. Encryption and decryption of data has recently been widely investigated and developed because there is a demand for a stronger encryption and decryption which is very hard for intrusion. Cryptography plays major roles in fulfilment of these demands. Many of researchers have proposed a lot of encryption and decryption algorithms....

In this paper, a novel architecture for a finite field integer multiplier based on a superset of the triple moduli set {2-1,2,2+1} is presented. The superset is constructed by adding extra moduli of the form 2±1 (for any non-zero integer n) to extend its range. The multiplier uses index transform approach whereby multiplication is carried out by index addition, and is organized into submodules ...

Seismic piezocone device (SCPTu) together with Resonant Column and Cyclic Triaxial test apparatus are employed to measure small strain shear modulus (G0) of carbonate sandy and clayey soils of southern coasts of Iran. A large area of southern regions of Iran is formed from clay, silt and sand. In this study, maximum shear modulus that is derived from both field (by seismic piezocone) and labora...