Host cells expressing HM74 were used to obtain oxydecalin-like molecules with agonist activity having the following structure: . During scanning in one frame, a high voltage signal is applied to the pixels in a next row before the next row is turned on, i. The first lens is a negative meniscus lens having a convex surface at an object side. Upon determining that the second condition of the first pattern is satisfied, a predetermined processing is performed. The methods involve performing a standardized welding process using an electrode of interest to create a test weld on a workpiece with a linearly varying contact to work distance in the process, measuring a distance from the beginning of the weld to a point at which gas tracking is first observed, and rating an electrode or ranking several electrodes according to the measured distance. A raised edge is disposed about a portion of the annular aperture.