In an inkjet printer, a cap part for receiving ink from a head unit during maintenance includes a liquid receiving part and an exhaust part disposed laterally to the liquid receiving part. Three or more user devices connected with the network are specified as constituting a secure communication group. Then, a data path of a parameter having a unique name is located according to the first hash table. In accordance with an exemplary embodiment, the list of elements may be used as an aid in learning a new technology, as a search tool to refine search queries or criteria, as a drafting tool to assist in the preparation of technical or legal documents, or any other practical use. The method includes an act of providing a laser die for reliability testing, an act of applying a plurality of short signal pulses to the laser die so as to simulate the aging of the laser die, and an act of ascertaining the reliability of the laser die based on its response to the plurality of short signal pulses. A method of determining the earth ground resistance of two or more pylon footings is provided according to the present disclosure, comprising conducting selective measurements of each footing of a pylon consecutively and wherein true values for the resistance of each footing measured are calculated.