Abstract: A sun tracking system for use with a solar panel is disclosed. The system has an actuator configured to cause a change in orientation of a solar panel; and a logic controller configured to control the actuator in accordance with a schedule so as to change the orientation of the solar panel. The schedule includes a set of times throughout a day when the orientation of the solar panel will be changed, an orientation of the solar panel being associated with each time. The schedule can include a set of target orientations of the solar panel, each target orientation being associated with a time of day, including: sunrise+1 hour, sunrise+4 hours, sunrise+7 hours, and sunrise+10 hours, where each of the four orientations of the solar panel is most direct with respect to the position of the sun at that time of day.

Abstract: A sun tracking system for use with a solar panel is disclosed. The system has an actuator configured to cause a change in orientation of a solar panel; and a logic controller configured to control the actuator in accordance with a schedule so as to change the orientation of the solar panel. The schedule includes a set of times throughout a day when the orientation of the solar panel will be changed, an orientation of the solar panel being associated with each time. The schedule can include a set of target orientations of the solar panel, each target orientation being associated with a time of day, including: sunrise+1 hour, sunrise+4 hours, sunrise+7 hours, and sunrise+10 hours, where each of the four orientations of the solar panel is most direct with respect to the position of the sun at that time of day.

Abstract: A cap which frictionally engages a piping tip has a generally conical cover portion with an interior surface, an exterior surface, a closed end and an open end sized to fit over a piping tip; a gripping portion on the exterior surface of the closed end of the cover portion; and a plurality of protuberances on the interior surface of the cover portion extending toward the closed end of the cover portion. The cap can include a circular ridge extending circumferentially around the interior surface of the cap, the ridge sized to fit within a circular indentation in the piping tip to maintain the cap on the piping tip.

Abstract: The present invention relates to a method of treating pain using a compound of formula wherein R1, R2, R3 and R4 are as defined herein. The invention also relates to certain novel derivatives of formula (I).