The achievement of adequate and prompt myocardial reperfusion in acute myocardial infarction (AMI) is the most important determinant of recovery of ventricular function at follow-up. This explains the great attention given to the so-called no-reflow phenomenon, which is associated with extensive myocardial damage and a high prevalence of future cardiac events after AMI. The no-reflow phenomenon...

Many practical optimization problems are nonsmooth, and derivative-type methods cannot be applied. To overcome this difficulty, there are different approaches to replace the derivative of a function f : Rn → R: interval slopes, semigradients, generalized gradients, and slant derivatives are some examples. In this paper we study the relationships among these approaches for nonsmooth Lipschitz op...

The purpose of this study was to identify possible age-related changes in vowel perception and to assess lexical in#uences on both children's and adults' perception. More speci"cally, we sought to evaluate two proposals regarding the development of speech categories* namely, the category expansion and category de"nition hypotheses (e.g., Flege, 1992). In Experiment 1, 5-yr-old, 9-yr-old and adu...

Winching is common in small-scale forest operations, especially on steep slopes, where tractors cannot reach the logs inside the forest. In this case, logs are dragged to the roadside with tractor-mounted winches, for later collection by transportation units. Winching is a heavy task, posing a high physiological stress on winching crew members. The aim of this study was to investigate the relat...

Monte Carlo simulation (MCS) provides a conceptually simple and robust method to evaluate the system reliability of slope stability, particularly in spatially variable soils. However, it suffers from a lack of efficiency at small probability levels, which are of great interest in geotechnical design practice. To address this problem, this paper develops a MCS-based approach for efficient evalua...

Patterns of incorrect answering or “misconception-like” responses to scientific concept questions have been well documented. Here we investigate both response choices and response times to gain insight into the nature of misconception-like responses. In a series of experiments involving questions on graphs in which participants must compare the slopes of two points, we find that students answer...

Abstract Spacing between check dams depends on the stream bed slope, effective height of check dams and slope of deposited sediments behind the check dams. The slope of deposited sediments is more important than the other two factors because of complications in the way of its occurrence and its measurement after several years of dam construction. This research presents the effective factors a...

the location of extracellular enzyme activities in soil aggregates can be influenced by slope position. this study aims to determine the effect of slope position on aggregate distribution of organic c and l-glutaminase activity. the soils were collected from different slope positions (shoulder, backslope, footslope and toeslope) at two pasture ecosystems (fereydoonshahr and chelgerd, central ir...

By assuming the existence of (quasi)-linear Regge trajectories for 25-plet mesons in the low energy region, we derive a new, 14th power, meson mass relation. This relation may be reduced to a quadratic Gell-Mann–Okubo type formula by fitting the values of the Regge slopes of these (quasi)-linear trajectories. Such a formula holds with an accuracy of ∼ 2% for vector mesons, and E-mail: BURAKOV@P...

This paper investigates the relative influences of climatic and anthropogenic factors in explaining environmental and societal changes in the southern Alps, Italy. We investigate a deep sediment core (LL081) from Lake Ledro (652 m a.s.l.). Environmental changes are reconstructed through multiproxy analysis, that is, pollen-based vegetation and climate reconstruction, magnetic susceptibility (MS...