ions in adolescence and adulthood. In M. Commons, F. A. Richards, & C. Armon (Eds.), Beyond formal operations (pp. 43-73).

In this paper, we will consider three deterministic models for the study of interaction between human immune system and a virus: logistic model, Gompertz generalized model (or Richards model). A qualitative analysis these based on dynamical systems theory be performed by studying local behavior equilibrium points obtaining dynamics properties from linear stability point view. Additionally, comp...

Transpiration, a process by which plants extract water from soil and transmit it to the atmosphere, is a vital (yet least quantified) component of the hydrological cycle. We propose a root-scale model of water uptake, which is based on first principles, i.e. employs the generally accepted Richards equation to describe water flow in partially saturated porous media (both in a root and the ambien...