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— We describe enhancements to the IEEE 802.11 DCF MAC Protocol which enable nodes to identify themselves as exposed nodes and to opportunistically schedule concurrent transmissions whenever possible, thereby improving utilization and mitigating the exposed node problem. The algorithm makes minimal changes to the IEEE 802.11 MAC protocol. It does not require(More)
Think-Pair-Share (TPS) is a classroom-based active learning strategy, in which students work on a problem posed by the instructor, first individually, then in pairs, and finally as a class-wide discussion. TPS has been recommended for its benefits of allowing students to express their reasoning, reflect on their thinking, and obtain immediate feedback on(More)
Radio Frequency Identification (RFID) finds use in numerous applications involving item identification and tracking. In a typical application, RFID tags are attached to the items and are periodically queried by readers. Using a fixed placement of readers to guarantee complete coverage of all tags in a given area at all times increases the deployment costs.(More)
Think-pair-share (TPS) is a classroom active learning strategy in which students work on activities, first individually, then in pairs and finally as the whole class. TPS allows students to express their reasoning, reflect on their understanding and obtain prompt feedback on their learning. While TPS is recommended to foster classroom engagement and(More)
The performance of applications on mobile devices is affected by the device constraints of memory, processing power, battery life and the variations in the wireless network. The variations in the wireless network will be compounded in the next generation networks—3G and beyond—when the devices move across heterogeneous networks. To allow interoperability(More)
Radio Frequency Identification (RFID) is slated to become a standard for tagging various products. As more and more products become RFID enabled, fast tag identification mechanisms will become important. Various tag identification (or anti-collision) algorithms have been proposed for RFID systems. This work focuses on methods to improve tag read efficiency(More)
The extent to which a wireless multi-hop network is connected is usually measured by the probability that all the nodes form a single connected component. We find this measure, called connectivity, unsuitable for use with sparse networks since it is not indicative of the actual communication capability of the network, and can be unresponsive to changes in(More)
— We have created a visual representation called Stratified Attribute Tracking (SAT) Diagram to explicate trends that are otherwise implicit in learning analytics data. SAT Diagram is a unified graph that enables tracking individual attribute values in a dataset and stratifying them according to criteria set by the researcher. SAT diagram represents the(More)