Bilateral patellar tendon ruptures without predisposing systemic disease or steroid use: A case report and review of the literature
Department of Emergency Medicine, University of Missouri–Kansas City/Truman Medical Center, Kansas City, MO 64018, USA.The American journal of emergency medicine (Impact Factor: 1.27). 12/2010; 30(1):261.e3-5. DOI: 10.1016/j.ajem.2010.11.011
Simultaneous bilateral patellar tendon rupture occurs rarely and is even rarer in patients without systemic disease or predisposing conditions. We present a case of bilateral, midsubstance patellar tendon ruptures along with a partial anterior cruciate ligament tear from a fall from a standing height in an otherwise healthy adult without any predisposing conditions. Most patients that sustain a tendon rupture have risk factors for tendonopathy including chronic renal disease, systemic lupus erythematosus, rheumatoid arthritis, or exposure to medications (such as corticosteroids or fluoroquinolones). Currently, there are approximately 50 reported cases of bilateral patellar tendon rupture in the scientific literature; however, only a small minority occurred in patients without any predisposing factors. Most of the reports of a bilateral tendon rupture without systemic disease occurred in the inferior pole of the tendon, with only a few of these occurring in the midsubstance. Because of the rarity of this event in a patient without systemic disease, this condition is often misdiagnosed. Emergency physicians should maintain a high degree of suspicion in those patients with concerning clinical and/or radiographic findings.
Conference Paper: Adjustable model reference adaptive control[Show abstract] [Hide abstract]
ABSTRACT: An adjustable model reference adaptive control strategy is proposed where both the controller and reference model parameters are adapted. Adaptive control laws for this structure implementing pole cancellation and replacement and avoiding the zero cancellation usually required by model reference adaptive control are developed from self-tuning adaptive algorithm modification.Decision and Control including the Symposium on Adaptive Processes, 1979 18th IEEE Conference on; 01/1980
Conference Paper: Active Vibration Control on the OSU Flexible Beam[Show abstract] [Hide abstract]
ABSTRACT: The idea of actively damping vibrations in flexible structure systems has received much attention in recent years. Such systems present a particular problem in that there is no fixed frame of reference for actuation; actuators must then be mounted on the structure itself. Currently at Ohio State a laboratory facility is being developed to study control of flexible structures; one specific configuration is a six foot free-free beam which is suspended from the ceiling. Such a beam can be controlled by applying torques about the bending axis or by applying transverse forces. Due to the size constraints of such a laboratory-scale experiment, a small structure with small actuators and sensing devices are utilized. Transverse actuators (developed in-house) were chosen for the experiment, and sensing is accomplished via several sets of strain gauges and accelerometers mounted on the structure. This paper discusses issues involved with the modeling of this structure, and presents a brief summary of the various control approaches, primarily from a decentralized viewpoint, which are currently being applied to the laboratory setup.American Control Conference, 1987; 07/1987
Conference Paper: A timing-accurate HW/SW co-simulation of an ISS with SystemC.[Show abstract] [Hide abstract]
ABSTRACT: The paper presents a system level co-simulation methodology for modeling, validating, and analyzing the performance of embedded systems. The proposed solution relies on the integration between an instruction set simulator (ISS) and the SystemC simulation kernel. In this way, the ISS is used to abstract the model of the real programmable device where the SW should run, while SystemC is used to model HW components that interact with the SW. A correct validation of such an architecture is infeasible without taking care of timing information. Thus, the paper proposes an effective timing synchronization mechanism, which uses timing information of an ISS (or a board) to synchronize the SystemC simulation.Proceedings of the 2nd IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis, CODES+ISSS 2004, Stockholm, Sweden, September 8-10, 2004; 01/2004
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