We study pairs of D-branes intersecting on null hypersurfaces, and other related configurations. These are supersymmetric and have finite energy density. They are open-string analogues of the parabolic orbifold and null-fluxbrane backgrounds for closed superstrings. We derive the spectrum of open strings, showing in particular that if the Dbranes are shifted in a spectator dimension so that the...

Kummell disease (KD) is a rare cause of vertebral fracture due to osteonecrosis. The natural history the characterized by previous minor trauma, subclinical window period, and then symptomatic period presenting with disabling pain, kyphosis, or neurologic deficit. As an important but non-discogenic cauda equina syndrome. Here, we report on wheelchair-bound 28-years-old bodybuilder man KD who pr...

‎In this paper we give an upper bound for Noetherian dimension of all injective modules with Krull dimension on arbitrary rings‎. ‎In particular‎, ‎we also give an upper bound for Noetherian dimension of all Artinian modules on Noetherian duo rings.

Objective — to establish the features of iron homeostasis in patients with steatohepatitis alcoholic and nonalcoholic etiology depending on presence dysmetobolic overload syndrome, identify probable link between ferrokinetics markers biochemical syndromes steatohepatitis, intensity endotoxicosis fibrosing reactions.
 Materials methods. The study was based clinical follow‑up 125 individuals...

In $1994,$ degree distance  of a graph was introduced by Dobrynin, Kochetova and Gutman. And Gutman proposed the Gutman index of a graph in $1994.$ In this paper, we introduce the concepts of  multiplicative version of degree distance and the multiplicative version of Gutman index of a graph. We find the sharp upper bound for the  multiplicative version of degree distance and multiplicative ver...

We give further results on the question of code optimality for linear codes over finite Frobenius rings for the homogeneous weight. This article improves on the existing Plotkin bound derived in an earlier paper [6], and suggests a version of a Singleton bound. We also present some families of codes meeting these new bounds.

Of 35 children with the nephrotic syndrome in relapse, 88% were found to have low circulating plasma pyridoxal-5'-phosphate (PLP) levels. Remission of the syndrome was associated with spontaneous normalization of plasma PLP levels in 23 such children. A significant (P less than 0,001) positive correlation (r = 0,81) was found between plasma albumin and PLP levels and a significant (P less than ...