infiltration in furrow irrigation is 2-d which depends on both time and surface characteristics at which infiltration occurs. however, in many furrow irrigation models, infiltration is determined as a function of infiltration time opportunity, assuming the variation of weted perimeter is low along furrow. in order to compare the proposed asumptions, two zero-inertia furrow irrigation models wer...

Permutations with low differential uniformity, high nonlinearity and algebraic degree over F22k are preferred substitution boxes in modern block ciphers. In this paper, we study the bijectivity difference uniformity of piecewise function help permutation group theory. Based on our results, We found many at least differentially 6-uniform 4-uniform permutations F22k, which can be chosen as boxes.

Agricultural irrigation is a primary user for freshwater withdrawal. Irrigation plays an important role in crop production, as it provides the benefit of reducing effects prolonged dryness and erratic precipitation. Center pivot system most common agriculture. As center ages, could develop leaking joint, clogged sprinklers, physical damage. This can cause areas non-uniformity that lead to under...

Functions with low differential uniformity have relevant applications in cryptography. Recently, functions c-differential attracted lots of attention. In particular, so-called APcN and PcN (generalization APN PN functions) been investigated. Here, we provide a characterization such via quadratic polynomials as well non-existence results.

The high productivity and efficiency of the use irrigation water that characterizes greenhouse horticultural crops can be affected by poor distribution uniformity. objective this work was to estimate average uniformity (DU) greenhouses in Almería, determining influence quality as well production system on A prospective study carried out which commercial farms were selected used different qualit...

Depleted uranium (DU) is an important by product in uranium enrichment process. Due toits applications in civilian and also military activity, DU emerged as environmental pollutant.The exposure to DU can occur via external or internal pathways. In external exposure, mainlybeta radiation from the decay products contributes to DU toxicity. Internal exposure to DUis more im...

Constructing S-boxes with low differential uniformity and high nonlinearity is of cardinal significance in cryptography. In the present paper, we show that numerous differentially 4-uniform permutations over F22k can be constructed by composing the inverse function and cycles over F22k . Two sufficient conditions are given, which ensure that the differential uniformity of the corresponding comp...

in this paper, free vibration of an Euler-Bernoulli beam with variable cross-section resting on elastic foundation and under axial tensile force is considered. Beam’s constant height and exponentially varying width yields variable cross-section. The problem is handled for three different boundary conditions: clamped-clamped, simply supported-simply supported and clamp-free beams. First, the equ...