tumor growth has a number of features in common with a physical process known as molecular beam epitaxy (mbe). so using the same equations for tumor growth is sensible. however, tumor substrate unlike mbe is not planar that makes necessary a geometrical treatment of the growth equations. a variety of mathematical models have been proposed to describe tumor growth. the justification for these mo...

in the initial models of economic growth, economic factors entered in to models but in the following models, non-economic factors entered in to models. many broad studies were done on this subject by the economists, and already considerable results were obtained. subjects such as corruption in the administrative bodies were new variables entering the literature of economic growth at that stage....

background: assessment of national children's growth indicated a high prevalence of growth failure among them. many previous projects have studied the children’s growth & nutrition status but most of them have not evaluated. the aim of this study was to evaluate the mothers' participation project after passing two years. methods: in this descriptive and summative evaluation study, 90 mother and...