A reloadable prepaid electronic transaction card is provided that is tied either electronically or physically with a loyalty program, a bonus point program or reward program. Such active materials include shape memory alloys, magnetic shape memory alloys, electroactive polymers, shape memory polymers, magnetorheological fluids, magnetorheological elastomers, electrorheological fluids, and piezoelectric materials. By using image capture and analysis, the placement of the item in the appropriate container can be verified without requiring the agent to scan or otherwise identify the container into which the item was placed. The refractive index of the core regions, the refractive index of the internal claddings, and the refractive index of the edge-cladding regions, are selected so as to maximize the optical power of a lowest-order mode propagating in the fiber core, and to minimize the optical power of the next-order modes in the fiber core. Accordingly, it is possible to acquire the displacement amounts of the vibration plates due to the driving of the pressure generation elements, by detecting the variations in resistance values of the diffusion layers due to the deformation of the vibration plates. Example air filter assemblies are described that include pulse jet air cleaning systems.