Abstract: Presented herein are systems and methods of redirecting clients through interaction with encoded links. A server of a linking system may receive, from a client, a request to access a target webpage via redirection through the linking system, in response to interaction with an encoded link of the linking system on a source webpage. The server may identify the target webpage to be accessed via the redirection based on the encoded link associated with the request. The server may determine a first metric indicating a degree of risk from presentation of the target webpage based on content on the target webpage. The server may determine a second metric indicating a frequency of visits to the target webpage via redirection through the linking system. The server may select a preview interstitial element, responsive to the first metric being below a first threshold and the second metric exceeding a second threshold.

Abstract: A system is provided for determining the type of vehicle which has never been sensed before that is transiting between a cluster of acoustic and seismic sensors by graphing an acoustic source level against a seismic source level for the vehicle, with light vehicles such as pick-up trucks being distinguished from heavy tracked vehicles such as tanks by where on the graph the plotted point for a vehicle lies.