Chad Crawford

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A considerable amount of clean semistructured data is internally available to companies in the form of business reports. However, business reports are untapped for data mining, data warehousing, and querying because they are not in relational form. Business reports have a regular structure that can be reconstructed. We present algorithms that automatically(More)
Selecting a minimal-cost team from a set of agents, with associated costs, to complete a given set of tasks is a common and important multiagent systems problem. Some degree of fault-tolerance in such teams is often required which enables the team to continue to complete all tasks even if a subset of the agents are incapacitated. A k-robust team is one that(More)
Cardiac and ventilatory motions cause artifacts at chest computed tomography (CT). To determine how short the scan times on third-generation units must be to avoid such artifacts, motion was measured with fast and ultrafast CT scans. Minimum detectable motion was then determined. The longest scan time that avoided a barely perceptible artifact was(More)
PURPOSE To evaluate a gating system, called predictive respiratory gating (PRG), that reduces motion-induced artifacts on computed tomographic (CT) scans of patients who cannot suspend respiration. MATERIALS AND METHODS PRG uses a respiration monitor and a new algorithm to predict when a motionless period is about to occur. It automatically starts(More)
Venous congestion after microvascular replantation remains a formidable problem even under ideal circumstances. The patient reported is a young woman with a traumatically avulsed upper lip aesthetic complex. Blood flow was reestablished using microanastomosis of the labial artery, however, no veins of adequate size could be recovered. With systemic(More)
Tags and other characteristic, externally perceptible features that are consistent among groups of animals or humans can be used by others to determine appropriate response strategies in societies. This usage of tags can be extended to artificial environments, where agents can significantly reduce cognitive effort spent on appropriate strategy choice and(More)
Tags and other characteristic features that are consistent among groups of animals or humans can be used to determine appropriate response strategies in societies. This usage of tags can be extended to artificial environments, where agents can significantly reduce cognitive effort by reusing strategies for new interaction partners based on their tags.(More)
Various computer and analytical models have been studied that analyze population dynamics of opinions of agents in societies under various assumptions of interaction restrictions and influences. Of particular interest to us are societal models based on Self-categorization Theory which addresses how agent opinions are affected based on interactions with(More)
Unmanned Aerial Vehicles (UAVs) have been traditionally controlled via remote control or by software, which require skill using the remote or expert programming skills. Our goal is to develop a natural mode of directing a drone’s actions, akin to the forms of expression one finds between a person and a pet and hence accessible to almost any person without(More)
Inadvertent arterial injections, both in cases of drug addiction and in iatrogenic situations, often result in significant loss of tissue and, eventually, loss of function distal to the injection site. Previous experimental studies regarding the effectiveness of agents to reverse vasospasm have been inconclusive. A recent clinical report, however, suggested(More)
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