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A biologically inspired approach to active visual target tracking is presented. The approach makes use of three strategies found in biological systems: space-variant sensing, a spatio-temporal frequency based model of motion detection and the alignment of sensory-motor maps. Space-variant imaging is used to create a 1-D array of elementary motion detectors(More)
Visually tracking a real-world target with an image sensor is widely applicable in robotics and human-computer interaction but is a computationally intensive task. Smart image sensors can make use of integrated motion detection circuits for target tracking, but algorithms for tracking complex, real-world targets are usually not suited to smart sensor(More)
CLINICAL QUESTION Is lumbar puncture still needed in suspected subarachnoid hemorrhage with a negative head computed tomographic scan performed within 6 hours of headache onset? ARTICLE CHOSEN Perry JJ, Stiell IG, Sivilotti ML, et al. Sensitivity of computed tomography performed within six hours of onset of headache for diagnosis of subarachnoid(More)
BACKGROUND Oxidative Stress contributes to the pathogenesis of many diseases. The NRF2/KEAP1 axis is a key transcriptional regulator of the anti-oxidant response in cells. Nrf2 knockout mice have implicated this pathway in regulating inflammatory airway diseases such as asthma and COPD. To better understand the role the NRF2 pathway has on respiratory(More)
This paper presents a signal processing architecture for a sensory-motor system based on the smart sensor paradigm. The architecture is designed for an obstacle avoidance task by a mobile robot in an unstructured environment. Drawing inspiration from the field of behavior-based robotics, the development of the architecture is guided by an emphasis on the(More)
  • David Claveau
  • 2012
Most of us are able to stand and likely learned to do so in the first year of our lives. While it may look easy, it is actually a difficult problem in sensory-motor control that involves multiple senses. A robot can be programmed to stand but its behavior will be more robust if it goes through an incremental learning process. Such an approach is(More)
Soon we will have anthropomorphic robots that will assist us at home and at work and will be able to recite our text-based communications to us in an animated and engaging manner. This paper describes some steps taken to explore this idea with a simple humanoid robot, the NAO Aldebaran, which is capable of speech of varying pitch, speed and loudness, and(More)
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