A slide switch includes a housing, a plurality of stationary contacts embedded in the housing, a slide member moveably contained in the housing, and a cover attached to the housing. The first case made of rigid material, being hollow body, has a recession disposed on an outer periphery thereof. The stent is carried on the support structure and is deployable from a first collapsed configuration to a second expanded configuration for engaging the inner walls of the selected vessel. The unreacted feedstock is reacted using a second heterogeneous catalyst in a trans-esterification process to produce a glycerin-biodiesel-methanol mixture. At least one coil pattern among the coil patterns has a thickness different from a thickness of rest of the coil patterns. Computer readable medium having stored thereon computer-executable instructions for performing a method of providing a document relevance score to a document on a network are also disclosed.