21. The value p = 0 represents a very rough surface that the scattering is then purely diffusive which gives: 22. Most physical systems are described in terms of mathematical models that include convective and diffusive transport of some variables. 23. The total transport rate of the species is then given by a summation of the Stefan flow and diffusive contributions. 24. It has thus been suggested that learning ( of task irrelevant stimuli ) is contingent upon spatially diffusive learning signals. 25. While the magnetic Reynolds number is the ratio of the nonlinear term and the diffusive term of the induction equation. 26. What is more, the governing equation turns out to be a random walk, or diffusive walk, in space. 27. If the diffusion and chemical reaction are decoupled, the combined autocorrelation is the product of the chemical and diffusive autocorrelations. 28. A perfectly diffusive sound space is one that has certain key acoustic properties which are the same anywhere in the space. 29. Double diffusive convection is important in understanding the evolution of a number of systems that have multiple causes for density variations. 30. Diffusive ventilation is simply a form of continuous gas exchange that occurs by diffusion rather than physically taking in the oxygen.