Scent dispenser assemblies for providing an extended time-release of a desired scent are disclosed herein. The method allows a device to be inserted in the disc either through a pre-existing rupture or through an opening formed in the front, back, or sides of the disc. 02provided that:f: a focal length of the entire system; andf2: a focal length of the second lens. A method for the simultaneous drying and transport of low-rank coal is also described.