Branson's North Carolina Business Directory for 1869 shows that Shelby, in the years immediately following the Civil War, had changed little from the rural county seat economy that it had been throughout the ante-bellum period.
Enterprise Architect provides a platform for the system engineer using the Systems Modeling Language (SysML) and model based development, and in addition to the engineering models the tool provides support for project and process management.
At present, modeling & simulation is the only paradigm which allows the simulation of complex behavior in a given environment's cognitive radio networks. Network simulators like OPNET, NetSim, MATLAB and NS2 can be used to simulate a cognitive radio network. Areas of research using network simulators include: