1 Effects of various frequencies (0.25, 0.5, 1.0, 1.5 or 2.0 Hz) of stimulation for various durations (2, 5, 10 or 15 min) on the contractile force of trabecular or papillary muscles of dog myocardium were investigated. 2 Effects of various frequencies (0, 0.25, 0.5, 1.0, 2.0 Hz) of various stimulus strengths (0.5, 1, 10 V) for various durations (2,5,10 or 15 min) on the Mg2+/-dependent Na+/--K...

Three experiments examined the time course of layout priming with photographic scenes varying in complexity (number of objects). Primes were presented for varying durations (800-50 ms) before a target scene with 2 spatial probes; observers indicated whether the left or right probe was closer to viewpoint. Reaction time was the main measure. Scene primes provided maximum benefits with 200 ms or ...

In this investigation, a facile and green sonochemical route has been developed for the synthesis of 2-Ketomethylquinolines by using 2-methylquinolines and several acyl chlorides in the presence of nanocrystalline MgAl2O4 as an efficient heterogeneous catalyst. The combination of nanocatalyst and ultrasonic process afforded corresponding ketomethyl quinolines in shorter re...

We describe three weight systems arising from the intersection graphs of chord diagrams (also known as circle graphs). These derive from the determinant and rank of the adjacency matrix of the graph, viewed over Z 2 , and from the rank of a " marked " adjacency matrix. We show that these weight systems are exactly those given by the Conway, HOMFLYPT and Kauffman polynomials, respectively.

background: the effect of corticosteroid therapy on corneal wound healing is controversial. the objective of this study was to evaluate the effects of combination therapy with dexametha-sone and acetylcysteine at different times and durations on experimentally-induced corneal wounds and haze in rabbits. methods: eighteen adult new zealand white rabbits were divided into three groups of six each...

In real-world manufacturing environments, it is common to face a job-shop scheduling problem (JSP) with uncertainty. Among different sources of uncertainty, processing times uncertainty is the most common. In this paper, we investigate the use of a multiobjective genetic algorithm to address JSPs with uncertain durations. Uncertain durations in a JSP are expressed by means of triangular fuzzy n...

In this paper, we widen the class of P-time Event graphs by introducing affine-interdependent residence durations. This new class is studied through a general algebraic model. Considering a periodic behavior, we provide conditions of existence of a trajectory and propose a technique allowing the determination of extremal solutions. We show that the cycle time is intrinsic to this new model: it ...