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We present a novel method for the discovery and statistical representation of motion patterns in a scene observed by a static camera. Related methods involving learning of patterns of activity rely on trajectories obtained from object detection and tracking systems, which are unreliable in complex scenes of crowded motion. We propose a mixture model(More)
We describe our experiences with deploying a vehicular Internet access service on public transit buses. Our system, called WiRover, has been running on these buses since April 2010 for about 18 months till date providing a WiFi hotspot to which bus passengers can connect. As of Dec. 1, 2011 we have observed 17,567 unique client devices connect to the(More)
Over the past year and a half we have operated a vehicle-to-Internet solution that provides WiFi connectivity to passenger buses. While operating this service we have found it difficult to centrally manage network resources despite multiple low level tools being available. For this reason we propose the <i>WiRover Policy Framework</i> which provides a(More)
We propose a technique, called FloMiS, by which a flow can be migrated from one network to another without requiring any changes to the endpoints (Internet-based servers or mobile clients). Our work is motivated by the needs of our vehicular Internet service, calledWiRover, through which we provide WiFi connectivity in public transit vehicles - city buses(More)
Sustaining the impressive mobile Internet revolution that has transformed our lives requires addressing the key challenge of designing future ultra-broadband wireless networks that can keep up with the data traffic growth. One of the key techniques to increase per-user as well as system capacity is to increase the amount of spectrum used in the network.(More)
We prove the convergence of the extremal processes for variable speed branching Brownian motions where the ”speed functions”, that describe the timeinhomogeneous variance, lie strictly below their concave hull and satisfy a certain weak regularity condition. These limiting objects are universal in the sense that they only depend on the slope of the speed(More)
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