in this paper, the effects of reflected waves of the facets on the internal optical intensity of semiconductor dfb lasers are investigated. the uniformity of optical intensity along the cavity length is evaluated with flatness parameter. the dependence of this parameter on coupling coefficient, reflectivity and grating phase at the facets is also studied. this investigation shows that in some s...

according to the irrigation systems design standards, allowed pressure variation in lateral pipes is 20 percent. reasons for this rate selection, which since the 60's is performed, are not known. the increased changes in allowed pressure tubes to lateral pipes design, the increased sprinkling system required pressure and the increased nonuniform sprinkler distribution, so energy supply cos...

Let m = pl be a product of two distinct primes p and l. We show that for almost all exponents e with gcd(e, φ(m)) = 1 the RSA pairs (x, xe) are uniformly distributed modulo m when x runs through • the group of units Zm modulo m (that is, as in the classical RSA scheme); • the set of k-products x = ai1 · · · aik , 1 ≤ i1 < · · · < ik ≤ n, where a1, · · · , an ∈ Zm are selected at random (that is...

this study explores the person/number suffixes in laki in a descriptive-analytic method. having a broad distribution, these suffixes can attach to subject and object nps, prepositions, and verbs. by considering the uniform syntactic behavior of subjects of transitive and intransitive predicates and it’s contrast with the behavior of objects of transitive predicates, the authors show that these ...

in this work a glass micromodel which its grains and pores are non-uniform in size, shape and distribution is considered as porous medium. a two-dimensional random network model of micromodel with non-uniform pores has been constructed. the non-uniformity of porous model is achieved by assigning parametric distribution functions to pores throat and pores length, which was measured using image a...