The invention concerns paclitaxel solubilizers and formulations thereof with a high propensity to dissolve paclitaxel. When a condition is detected for selecting new processing elements, one or more processing elements are selected as the new processing elements based on at least a temperature parameter and a usage history parameter of at least some of the processing elements in the data center. With the latch mechanism released, the seat back can pivot toward the parallel orientation, which causes the hook mechanism to disengage. A current-time searcher searches the content-addressable memory for a scheduled transmission time matching the current time.