An RF aperture coldplate for positioning in heat transfer proximity to heat-generating elements of an RF antenna system is presented. Thereby the program for selection of the search key is defined by the trie entries themselves, enabling a general variety of search selections and jumps to avoid any unnecessary parts of the trie search key. The dot-patterned structure is composed of a first layer, which is continuous, and a second layer, which is discrete. The chamber is capable of receiving at least a portion of the light emitting diode, such that, light from the light emitting diode passes though the lens to illuminate an area around the switch. Thus cells of different sequences may be interleaved with one another as they depart the cell memory. By administering a solid composition comprising a drug and a mucoadhesive substance having an adhesion strength of from 200 to 1000 g in the conjunctival sac, a drug delivery system excellent in drug transfer to a tissue of the posterior segment of the eye via a local eye tissue can be constructed.