A solar cell comprises an n-type semiconductor layer, a p-type semiconductor layer, a p-side electrode layer, an n-side electrode; and a ZnO transparent electrode layer. A seat tube extends between the upper frame member and the lower frame member. The EAVS may establish an event frame, wherein a present frame captured after establishing the no-event frame is marked as the event frame if the difference between the present frame and a previous frame is greater than the threshold value. If the calculated identifier is equal to the previously stored identifier, then the charting component retrieves a previously produced chart image from the representation of the chart data from the server. If a joining material is used, the foil reaction will supply enough heat to melt the joining materials, which upon cooling will form a strong bond, joining two or more bulk materials. The virtual machine manager responsively allocates a virtual machine to the user according to the user’s categorization.