A syringe plunger driver system capable of capturing syringes of widely varying sizes comprises a pair of asymmetric plunger retainer arms pivotally mounted to a plunger driver. According to an embodiment of the invention, the nodes on a multicast tree or a broadcast tree may compute alternate paths for each of the downstream nodes in the multicastbroadcast tree or for select nodes in the multicastbroadcast tree. The CC frame contains information relating to at least one of a priority limit for a next centralized contention interval, a length of the next CCI, a permission probability associated with the next CCI and information relating to a reservation request frame successfully received by the PC in a previous CCI. The quench raises the level of the molten sump in the ingot, which helps to overcome the indicated problems, without affecting the desired temperature rebound of the ingot shell ) for a time effective to cause in-situ homogenization. The method further includes applying steady direct electric current through the anode, the electrolyte bath and the cathode to coat the article with cobalt, phosphorous and the tribological particles. The navigation apparatus and method computes or retrieves and outputs or displays a unit area not suitable for travel, that is, a \u201ccell\u201d, from a destination, based on, for example, a type of moving object or data of a navigated area.