Those are temperature and particle size. Solution concentration, diffusion distance, and a membrane's surface area and permeability affect net diffusion without impacting the kinetic energy.
Diffusion occurs when molecules move randomly using thermal or kinetic energy. Molecules in a solution tend to achieve a state of equilibrium, becoming evenly distributed. In net diffusion, molecules move in a direction from higher to lower concentrations. If a membrane separates two areas of differing concentration of the substance, net diffusion occurs through the membrane.