age and growth of mesopotamian barb, capoeta damascina, were studied in the zayandehrud river, in central iran, from march 2007 to april 2008. among the 689 specimens studied, age groups in males ranged from 1+ to 9+ and that in females ranged from 1+ to 10+. the sex ratio (1m:1.6f) was not significantly different from 1:1 ratio. maximum fork length and weight was 39 cm and 1,115 g for males an...

In this paper we investigate the effects of broadband infrastructure providing high speed internet, on economic growth in developing countries. We have used two different broadband measures to classify developing countries into two groups for the period 1999-2008. By using logistic diffusion model and IV approach, a nonlinear diffusion model is specified. Differences in ceiling of diffusion cur...

Ortega (1985) proposed a simple first-order differential equation to describe plant cell extension and, unlike the Lockhart equation (Lockhart, 1965), it takes into account elastic deformation of the cell wall. Cosgrove (1985) and Ortega (1985) solved the equation for the particular case of a previously growing plant cell that is deprived of its water source; thus, GR 5 0. The results (confirme...