Applications of so‰ware de€ned networking (SDN) concepts to infrastructure-less wireless networks are substantially unexplored, mainly because of the complex nature of the distributed control problems and of the unavailability of a high-speed backhaul. Œis article presents an initial aŠempt at developing a principled approach to so‡ware-de€ned wireless networking based on cross-layer optimizati...

The growing recognition of the need for computer system security has resulted in the design, development and installation of "patches," packages and even new operating systems intended to provide higher degrees of data and systems protection. With the increased utilization of computer networks and current developments in the area of network operating systems (NOSs)40,19,30 the requirements for ...

Even with the success of software defined networks (SDN), it remains challenging to write a portable, correct, and efficient controller application. This is due to the mismatch between the expectations of controller applications and (i) the heterogeneity of switches and (ii) the primitives offered by OpenFlow, the prevalent SDN protocol. We introduce NOSIX, a portable low level switch programmi...

One of the problems related to sensor networks built up from large number of nodes having limited capabilities is the operating system running inside each node. It must provide a lot of functionality and allow easy development of applications, but has very restricted resources (like memory, processing capabilities, and energy). Some of the features are also related to the general nature of the ...

Finding the collapse susceptible portion of a power system is one of the purposes of voltage stability analysis. This part which is a voltage control area is called the voltage weak area. Determining the weak area and adjecent voltage control areas has special importance in the improvement of voltage stability. Designing an on-line corrective control requires the voltage weak area to be determi...

Finding the collapse susceptible portion of a power system is one of the purposes of voltage stability analysis. This part which is a voltage control area is called the voltage weak area. Determining the weak area and adjecent voltage control areas has special importance in the improvement of voltage stability. Designing an on-line corrective control requires the voltage weak area to be determi...

This dissertation describes our efforts to improve sensor network performance evaluation and portability, within the context of the sensor network project Hogthrob. In Hogthrob, we faced the challenge of building a sensor network architecture for sowmonitoring. This application has hard requirements on price and performance, and shows great potential for using sensor networks. Throughout the pr...

The interconnection network and its associated software libraries are critical components for high-performance cluster computers and supercomputers, Web-server farms, and network-attached storage. Such components will greatly impact the design, architecture, and use of future systems. Key solutions in high-speed interconnects include Gigabit Ethernet, GigaNet, the Scalable Coherent Interface (S...