A positioning system for a solar panel includes a frame, a surface plate, an adjustable rail and a frame coupling. Long covering member has a smooth outer surface folded about the core and overlapping side edge portions adhesively attached together and to the core. The device can be used to detect pathogens, proteins, and other biological materials of interest in food, water, and environmental samples. The fan is in fluid communication with the heat generator to drive air over the heat generator within the housing. The parameters of the controllers are optimized using the method of particle swarms by minimizing an index that is a function of the history of the load swing. By FWM the WDM light and a pump lightwave multiple times, wherein each FWM process is executed with a pump lightwave having a different frequency, either in series or parallel, the number of optical channels produced as a result of FWM effectively increases the number of optical channels present in addition to those from the WDM signal.