Let k ≥ 2 be an integer. An abelian k-th power is a word of the form X1X2 · · ·Xk where Xi is a permutation of X1 for 2 ≤ i ≤ k. A word W is said to be crucial with respect abelian k-th powers if W avoids abelian k-th powers, but Wx ends with an abelian k-th power for any letter x occurring in W . Evdokimov and Kitaev [2] have shown that the shortest length of a crucial word on n letters avoidi...

We show that the Szekeres system with cosmological constant admits a sufficient number of conservation laws, which allow to claim integrability system. The main novelty in this investigation is we find unique attractor isotropic inhomogeneous de Sitter (-like) universe, contrary original attractors describe Kantowski-Sachs spacetimes. also study existence quantum corrections and emergence class...

Air Asam Tambang (AAT) merupakan salah satu permasalahan yang dihadapi di dunia pertambangan. Untuk itu perlu dilakukan pengolahan AAT guna menjamin kualitas air keluaran hasil kegiatan Salah metode telah banyak digunakan adalah secara pasif menggunakan Open Limestone Channel (OLC). Namun pada sistem tersebut terdapat kekhawatiran mengenai lapisan oksida besi permukaan limestone. Endapan menyeb...

Six-week-old Dahl salt-sensitive (S) and -resistant (R) rats received for 2 wk an intracerebroventricular infusion of aldosterone (Aldo) (22.5 ng/h) or vehicle containing artificial cerebrospinal fluid (aCSF) with 0.15 M Na+. At 8 wk, mean arterial pressure (MAP), heart rate (HR), and renal sympathetic nerve activity (RSNA) were recorded in conscious rats at rest, in response to air stress, and...

The actual task of oncology is effective treatment of cancer while causing a minimum harm to the patient. The appearance of polymer nanomaterials and technologies launched new applications and approaches of delivery and release of anticancer drugs. The goal of work was to test ultra dispersed diamonds (UDDs) and onion-like carbon (OLCs) as new vehicles for delivery of antitumor drug (doxorubici...

We discuss domain walls and vacuum energy density (cosmological constant) in N = 1 gluodynamics and in non-supersymmetric large N orientifold field theories which have been recently shown to be planar equivalent (in the boson sector) to N = 1 gluodynamics. A relation between the vanishing force between two parallel walls and vanishing cosmological constant is pointed out. This relation may expl...

A bstract We compare the path integral for transition functions in unimodular gravity and general relativity. In cosmological constant is a property of states that are specified at boundaries whereas relativity parameter action. Unimodular with nondynamical background spacetime volume element has time variable canonically conjugate to constant. Wave depend on satisfy Schrödinger equation. On co...