A method, and corresponding hardware and software implementations, including receiving a client login from a client user; loading contextual information including at least one contextual parameter; determining a business process according to the contextual information; and executing the business process. The antenna unit includes two metal sheets and a conductive substrate, and the metal sheets are disposed at a corresponding position above the conductive substrate and electrically connected to the conductive substrate. The computer-readable medium includes instructions for the system to implement a method for monitoring the system for modem use. A connected component labeling procedure is then applied to obtain one or more red regions. A large loudspeaker area therein transmits the low frequencies, a smaller the medium and high frequencies. Also, the amine can be produced with high selectivity and highly economically by reacting a primary amine with an aminocarboxylic acid to run amidation.