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Strong Stabilization (strong + stabilization)

Distribution by Scientific Domains

Chemistry	50%

Selected Abstracts

Strong stabilization of a structural acoustic model, which incorporates shear and thermal effects in the structural component

MATHEMATICAL METHODS IN THE APPLIED SCIENCES, Issue 12 2010
Marié Grobbelaar-Van Dalsen
Abstract In this paper we consider the question of stabilization of a linear three-dimensional structural acoustic model, which incorporates displacement, rotational inertia, shear and thermal effects in the flat flexible structural component of the model. We show strong stabilization of the coupled model without incorporating viscous or boundary damping in the equations for the gas dynamics and without imposing geometric conditions. It turns out that damping is needed in the interior of the plate. Our main tool is an abstract resolvent criterion due to Y. Tomilov. Copyright © 2009 John Wiley & Sons, Ltd. [source]

Synthesis and Triple-Helix-Stabilization Properties of Branched Oligonucleotides Carrying 8-Aminoadenine Moieties

HELVETICA CHIMICA ACTA, Issue 2 2004
Anna Aviño
The synthesis of several branched oligonucleotides, i.e., of the parallel hairpins 5,8 and the Y-shaped 9 is described, together with their use in the formation of pyrimidine,pyrimidine,purine triple helices. Special attention was paid to the optimization of the assembly of the second strand from asymmetric branching molecules. The presence of 8-aminoadenine moieties in the WatsonCrick purine strand and 2,- O -methyl-RNA in the Hoogsteen pyrimidine strand produced strong stabilization of the triplex. [source]

A numerical study of combustion stability in emergency oxygen generators

AICHE JOURNAL, Issue 4 2006
Victor Diakov
Abstract Combustion in sodium chlorate based emergency oxygen generators is accompanied by significant oscillations of the product oxygen flow rate, which decrease the efficiency of these devices. Reactant melting and convective heat transfer from the generated gas are key steps in the process. In this work, the effect of reactant melting on filtration combustion front propagation stability in gas generating mixtures is investigated numerically. The formation of melting regions is demonstrated in cases with significant convective gas-to-core heat transfer. Numerical simulations exhibit the oscillatory behavior of oxygen generation. By decreasing the effective heat of reaction, reactant melting is detrimental to combustion front stability. The simulations show growth of pulsations with increasing reaction activation energy and decreasing convective heat transfer. A strong stabilization of front propagation is observed when combustion temperature reaches the melting point of reaction product. These results identify the important factors responsible for pulsating behavior of chemical oxygen generators. © 2005 American Institute of Chemical Engineers AIChE J, 2006 [source]