A standard model of nonlinear combiner generator for stream cipher system combines the outputs of several independent Linear Feedback Shift Register (LFSR) sequences using a nonlinear Boolean function to produce the key stream. Given such a model, cryptanalytic attacks have been proposed by finding out the sparse multiples of the connection polynomials corresponding to the LFSRs. In this direct...

Before discussing multiplication, let us speak about addition. The number A(k) of distinct sums i+ j ≤ k such that 1 ≤ i ≤ k/2, 1 ≤ j ≤ k/2 is clearly 2 bk/2c − 1. Hence the number A(2n) of distinct elements in the n × n addition table involving {1, 2, . . . , n} satisfies limn→∞A(2n)/n = 2, as expected. We turn to multiplication. Let M(k) be the number of distinct products ij ≤ k such that 1 ≤...

Information distance is a parameter-free similarity measure based on compression, used in pattern recognition, data mining, phylogeny, clustering, and classification. The notion of information distance is extended from pairs to multiples (finite lists). We study maximal overlap, metricity, universality, minimal overlap, additivity, and normalized information distance in multiples. We use the th...

The authors evaluations using CFD analysis to calculate the rate of pipe bend erosion utilised in fluid-circulating technological installations along with solid particles on small size nature bottom ash are described this work. examined bends have various degrees curvature and same wall thickness diameter is made stainless steel. regions values main goals study. extrados where mostly happens. t...

The surfaces of a three-dimensional topological insulator each host single Dirac fermion, which, in strong magnetic field, contribute to the transverse conductance integer-and-a-half multiples quantum. direct observation this extra half integer, hallmark two-dimensional state, is usually thwarted by fermion doubling theorem—top and bottom are not measured independently. Here, we employ Corbino ...

A 33 years old woman, treated for hypertension on monotherapy for a year, was admitted on emergency for sudden onset headache. Clinical examination revealed a conscious patient, blood pressure= 13/7, with the presence of frank meningeal syndrome, no fever. Cerebral CT showed subarachnoid hemorrhage at the right middle cerebral valley. The arteriography objectified three aneurysmal dilations at ...

dans une conception traditionnelle, l’intelligence est fixée et peut être mesurée par un nombre dans un contexte déconnecté de toute réalité et s’attribuer une forme unique. dans une vision nouvelle, en se basant sur la théorie des intelligences multiples de gardner, l’intelligence a  en revanche de différentes composantes et peut être développée  durant toute la vie. le présent article s’intro...