A Distributed and Policy-Free General-Purpose Shared Window System

Shared window systems allow collaboration-transparent, single-user applications to be displayed and interacted with on multiple users' workstations, enabling the members of a cooperative ensemble to simultaneously share and revise information. This paper presents a system capable of sharing applications running under the X Window System. In contrast to previously implemented systems, our shared window system addresses issues that are crucial for general-purpose use. Our shared window system is policy-free, i.e. there are no preferred policies for handling issues such as admission and floor control. Instead, it offers a set of essential mechanisms on top of which various policies and user paradigms may be realized. Further, the system distributes the sharing functionality among all sites involved in a cooperative activity. Measurements have shown a positive impact of this on the overall performance of the system and thus justified the viability of the design decisions taken. I

Collision-Minimizing CSMA and its Applications to Wireless Sensor Networks

Recent research in sensor networks, wireless location systems, and power-saving in ad hoc networks suggests that some applications' wireless traffic be modeled as an event-driven workload: a workload where many nodes send traffic at the time of an event, not all reports of the event are needed by higher-level protocols and applications, and events occur infrequently relative to the time needed to deliver all required event reports. We identify several applications that motivate the event-driven workload, and propose a protocol that is optimal for this workload

S. Garimella Experimental Investigation of Heat Transfer in Coiled Annular Duets

Forced convection heat transfer in coiled annula