Abstract: A foldable shelter can have several wall sections joined to form a cylindrical lattice, and a roof section coupled to the wall sections. The wall sections each have a first member pivotally joined to a second member at near their respective midpoints. The shelter is foldable from an expanded state by inverting the roof segment into the interior of the shelter and pivoting the first and second members of the wall sections towards a parallel orientation. The shelter can have fixed length or extendable vertical and horizontal supports to enhance overall rigidity. The shelter can withstand wind loads without external bracing or cable support.

Abstract: A Max Sessions Server (MSS) automatically detects hardware and communications failures. Upon detection, counters are adjusted accordingly to maintain an accurate count of users or groups of users on a system. A database of unique identifiers for each connection is maintained, where the unique identifier is a concatenation of a Network Access Server (NAS) and the connection's incoming NAS node number. If a user requests permission to log into the system, the MSS first checks the database to determine if the unique identifier is already logged in. If so, then a hardware or communications failure has occurred and the MSS must make the appropriate adjustments to the database and counter.

Abstract: A method is disclosed for managing a network having a plurality of network elements, where the network elements are configured to be interconnected to one another. A data structure is maintained that includes information about a link state for each network element in the plurality of network elements. The link state for each network element describes a connection between that network element and at least one other network element designated to be connected to that network element. A management policy is configured for the plurality of network elements by using link state information in the data structure to detect if any of the plurality of network elements are unreachable.