Douglas Lautner

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Software aging is a common phenomenon which is often manifested through system performance degradation. Rejuvenation is one of the most commonly used approaches to handle issues caused by software aging. To combat resource performance degradation and at the same time maintain maximized average resource performance, we present a two-level rejuvenation(More)
Most schedulability analyses in the literature assume that the performance of computing resource does not change over time. However, due to ever increased complexity of computer system, software aging issues become more difficult, if not impossible, to eradicate. Hence, the assumption that computing resource has a constant performance in its entire lifetime(More)
As mobile devices become increasingly more advanced and essential for everyday life, minimizing power consumption of these devices has also become one of the critical design concerns, especially for those mobile devices that support "always-on" applications, such as a driving mode detection application. In this paper, we present a design, implementation,(More)
Most schedulability analyses in the literature assume that the performance of computing resource does not change over time. However, due to ever increased complexity of computer systems, software aging issues become more difficult, if not impossible, to eradicate. Hence, the assumption that computing resource has a constant performance in its entire(More)
Strictures of the esophagus represent persistent luminal narrowing following an inflammatory insult to mural tissues or a manifestation of malignant disease. Barium studies remain the cornerstone of evaluation of patients with a suspected stricture. The diagnostic features of the various causes of strictures are discussed. Balloon dilatation and stent(More)
The periodic task set assignment problem in the context of multiple processors has been studied for decades. Different heuristic approaches have been proposed, such as the Best-Fit (BF), the First-Fit (FF), and the Worst-Fit (WF) task assignment algorithms. However, when processors are not dedicated but only periodically available to the task set, whether(More)
Researches in real-time scheduling often assume that the performance of a computing resource does not change over time. However, as system softwares and system architectures become increasingly complex, resource performance degradation over time becomes more evident. In this paper, we study the schedulability of a hard real-time task set on a resource which(More)
As network connectivity becomes more capable, mobile devices are evolving into sensory data accumulators. Bluetooth (BT) components, which are widely used for communication purposes, also have the potential to become contextual sensors by constantly listening to information broadcast by nearby Bluetooth Low Energy (BLE) beacons. Compared to traditional(More)
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