Let [T (n, k)]n,k>0 be a triangle of positive numbers satisfying the three-term recurrence relation T (n, k) = (a1n + a2k + a3)T (n− 1, k) + (b1n + b2k + b3)T (n− 1, k − 1). In this paper, we give a new sufficient condition for linear transformations

background vancomycin-resistant enterococci (vre) are the most common nosocomial pathogen worldwide. colonization with vre can lead to serious infection, some of which e.g. vre sepsis can be fatal. because vre are dangerous important pathogens, we aimed to determine the prevalence of vre among patients admitted in infectious, icu and surgery wards in a referral teaching hospital in isfahan, ira...

Following the method of combinatorial telescoping for alternating sums given by Chen, Hou and Mu, we present a combinatorial telescoping approach to partition identities on sums of positive terms. By giving a classification of the combinatorial objects corresponding to a sum of positive terms, we establish bijections that lead a telescoping relation. We illustrate this idea by giving a combinat...

We investigate the disciplining role of debt in the publicly held firm by examining the relation between employee productivity and financial leverage. The unique feature of our study is that we incorporate outside employment opportunities for employees into the analysis. Consistent with the notion that the debt serves as a bonding mechanism because agents exert additional effort to avoid the pe...

In isolated rat hearts perfused with HEPES and red blood cell-enriched buffers, we examined changes in left ventricular pressure induced by increases in heart rate or infusion of adenosine to investigate whether the negative force-frequency relation and the positive inotropic effect of adenosine are related to an inadequate oxygen supply provided by crystalloid perfusates. Hearts perfused with ...

This paper investigates the dynamic interactions among economic growth, unemployment, income distribution and population growth. The model combines rational behaviour of agents, and pro...ts as the crucial determinant of the accumulation of ...rms with endogenous fertility and unemployment. In particular the supply of labour is determined by micro-founded fertility choices of the individuals. W...

This study explored the relationship between vocabulary learning strategies and learner variables of Iranian learners of English as a foreign Language (EFL) with special reference to their personality types to examine what implications these associations have for teaching EFL. It tried to find any possible relation between vocabulary learning strategies use of Iranian EFL students and two perso...

background: hepatitis activity index (hai) and fibrosing stage are two important findings during the evaluation of liver samples in patients with chronic hepatitis b. the aim of this study was to determine the hai and fibrosing stage in patients with anti-hbe positive chronic hepatitis b. methods: liver biopsy slides of 72 patients were evaluated at the department of pathology in two teaching h...