A light conversion apparatus has a germanium-based photodiode, and a polysilicon-based receiving electrode for receiving light to be converted by the photodiode. The device may include a fan to dissipate thermal energy generated during the operation of the plurality of graphics processing units. The methods and systems of the present invention can be utilized in a variety of different industrial applications including raw water processing and waste water processing. The saw is laterally and pivotally adjustable to follow the determined path established by the computer. The plunger housing houses the plunger and is attached to the body section. The head brush assembly also has a spring-biased storage position wherein the entire head brush assembly is pivotally retracted away from the tape head.