The Quasi-Reversibility Regularization Method (Q-RRM) provides stable approximate solution of the Cauchy problem Helmholtz equation in Hilbert space by providing either additional information Laplace-type operator or imposed boundary conditions on equation. To help bridge this gap literature, a Modified Quasi-reversibility (MQ-RRM) is introduced to provide both occurring and equation, resulting...

We study the transition graphs, and thus, possible computational paths of reaction systems which are reversible according to different notions reversibility. show that in sense our earlier work produce very simple types graphs. A somewhat more complicated, but still quite class graphs is obtained if we consider so-called initialized systems. Finally introduce notion reversibility with lookbehin...

let $m_r$ be a non-zero‎ ‎module and ${mathcal f}‎: ‎sigma[m_r]times sigma[m_r]‎ ‎rightarrow$ mod-$bbb{z}$ a bifunctor‎. ‎the‎ ‎$mathcal{f}$-reversibility of $m$ is defined by ${mathcal‎ ‎f}(x,y)=0 rightarrow {mathcal f}(y,x)=0$ for all non-zero $x,y$‎ ‎in $sigma[m_r]$‎. ‎hom (resp‎. ‎rej)-reversibility of $m$ is‎ ‎characterized in different ways‎. ‎among other things‎, ‎it is shown‎ ‎th...

Introduction:Patients with the coronary slow flow phenomenon (SCF) frequently experience angina episodes. The purpose of this study was to determine efficacy of nicorandil in myocardial perfusion in patients with SCF. Methods: Twenty patients (50.85 ± 12.96 y) with SCF were studied.  We evaluate coronary slow flow according to protracted thrombolysis in m...

It has been shown that patients with chronic obstructive pulmonary disease (COPD) develop dynamic hyperinflation (DH), which contributes to dyspnoea and exercise intolerance. Formoterol, salmeterol and oxitropium have been recommended for maintenance therapy in COPD patients, but their effect on DH has only been assessed for salmeterol. The aim of the present study was to compare the acute effe...

We introduce a method of reversing the execution imperative concurrent programs. Given an irreversible program, we describe process producing two versions. The first performs forward and saves information necessary for reversal. second uses this saved to simulate propose using identifiers capture statement order, use correctly undo data races via backtracking reversibility. prove reversibility ...