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In this paper a high-performance, robust and scalable scheduling algorithm for input-queued switches, called distributed sequential allocation (DISA), is presented and analyzed. Contrary to pointer-based arbitration schemes, the algorithm proposed is based on a synchronized channel reservation cycle whereby each input selects a designated output,(More)
Guaranteed Quality-of-Service (QoS) is a predominant requirement from modern high-performance switches and routers. Such devices are expected to support a large number of ports at high line rates carrying traffic with diverse statistical properties. In this paper a scheduling scheme for high-performance WDM packet-switch networks is presented. The proposed(More)
The nonlinear effects of Mach–Zehnder modulator (MZM) and self phase modulation (SPM), in optical orthogonal frequency division multiplexing (OFDM) under the presence of high peak power is studied. A full coherent optical communication system is presented and analyzed. Standard method to reduce the peak to average power ratio (PAPR) values combined with(More)
1. INTRODUCTION There has been extensive work focused on modeling discrete-time queueing systems with correlated arrivals [1], [2], [3], [4]. Specific attention has been drawn to queueing models with application to data switching, where bursty arrival streams represent more accurately real-life network traffic. To that end, the Markov modulated ON-OFF model(More)
OBJECTIVE To determine if ECG repolarization measures can be used to detect small changes in serum potassium levels in hemodialysis patients. PATIENTS AND METHODS Signal-averaged ECGs were obtained from standard ECG leads in 12 patients before, during, and after dialysis. Based on physiological considerations, five repolarization-related ECG measures were(More)