Warren B. Jackson

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— The general solution to constrained linear and piecewise linear model predictive control (MPC) has recently been explicitly characterized in terms of piecewise linear (PWL) state feedback control. This means that a PWL controller can be precomputed using parametric programming, and the exact explicit MPC implementation amounts to the evaluation of a PWL(More)
Ten consecutive patients at Howard University Hospital underwent modified radical mastectomy with immediate breast reconstruction using a temporary tissue expander. Postoperative irradiation was delivered to the breast mound encompassing the tissue expander. The effects of expansion on the delivery of postoperative irradiation was assessed. Dosimetric(More)
We demonstrate that human-vision-model-based image quality metrics not only correlate strongly with subjective evaluations of image quality but also with human observer performance on visual recognition tasks. By varying amorphous silicon image system design parameters, the performance of human observers in target identification using the resulting test(More)
This paper presents an overview of the Xerox PARC levitating media transport, including initial experimental results. The levitating media transport is a closed-loop MEMS-based motion control system that employs 12 in. x 12 in. arrays of directed air jets to levitate and control the motion of planar objects, such as sheets of paper, without contacting them.(More)
This is a report on two children with a syndrome characterized by an extensive congenital ichthyosiform eruption, neurosensory deafness, hypotrichosis, partial anhidrosis, and vascularization of the cornea. The facial involvement is distinctive. Other features are dystrophy of the nails and tight heel cords. Both children are of normal intelligence. The(More)
Hyper-redundant robotic manipulators are robots that have many more degrees of freedom than required for a task such as grasping an object in 3D space. The large number of joints, possibly ranging from dozens to thousands, offers both challenges and opportunities for control of such robots. A challenge is to develop algorithms that scale and adapt to(More)
Continuous constrained optimization is at the core of many real-world applications such as planning, scheduling, control, and diagnosis of physical systems (car, planes, factories). Effective constraint-based techniques must handle the complexity of real-world continuous constraint problems by dynamically adapting solvers to the structure of the problem.(More)
Continuous constraint satisfaction is at the core of many real-world applications. One example is in the control of modular, hyper-redundant robots, which are robots with many more degrees of freedom than required for typical tasks. Casting the control problem as a constraint problem is a promising approach for robustly handling a variety of non-standard(More)
— Solutions to constrained linear and hybrid model predictive control (MPC) can be explicitly characterized in terms of piecewise linear (PWL) state feedback control. A PWL controller is pre-computed using parametric programming , and the exact explicit MPC implementation corresponds to the evaluation of a PWL function in the control unit. It has recently(More)