Abstract Aeronautical compressor fans currently operate with minimal blade-casing clearance. This therefore makes the occurrence of rub events very likely. Under specific circumstances, blade undergoes excessive amplification contact-induced oscillations, called hereafter divergence, which can be critical for structural integrity engine. paper proposes an investigation mechanisms responsible di...

Traditionally, studies of scientific productivity are biased in two ways: they are based on Current Contents, an index centered in British and American journals, and they seldom correct for population size, ignoring the relative effort that each society places in research. We studied national productivity for biology using a more representative index, the Biological Abstracts, and analyzed both...

Stylized facts derived from wage pattern analysis in the U.S. point to the importance of non-standard explanations for changes of relative wage. Learning while working is predicted to be able to account for wage divergence so far unexplained. Increases in productivity differ among individuals due to heterogeneity in learning capabilities which excludes a group of workers from training. This sel...

It is now evident in the literature that the information and communication technology (ICT) has a positive and significant impact on the productivity and economic growth. Most studies in this area, however, are limited to the developed countries. Given different regulations and economic conditions, and also an increasing trend in allocating resources to ICT in developing countries, it is import...

this study aimed to measure the hospital productivity using data envelopment analysis (dea) technique and malmquist indices.this is a cross sectional study in which the panel data were used in a 4 year period from 2007 to 2010. the research was implemented in 12 teaching and non-teaching hospitals of ahvaz county. data envelopment analysis technique and the malmquist indices with an input-orien...

Recent evidence of an increase in the trend rate of productivity growth inspires speculation about how a change in the underlying process of technological progress might be associated with adjustment dynamics. This paper considers such dynamics in the framework of a computable general equilibrium model that incorporates stochastic growth. Simulations of the model suggest that transition dynamic...