Systems and methods applicable, for example, to searching for entities reachable via networking, allowing for communications among node users, and performing sharing operations. Biopolymer features are attached to the surfaces of the supports. An initial transportation plan having a set of vehicle routes, a set of vehicle schedules, and a set of crew schedules that satisfy the set of transportation requests is created. MR images are generated based on the MR signals with the interfering MR signals removed.