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Optical waveguide structures such as Multimode inference (MMI) structures, Y-connectors, splitters, couplers, multiplexers, switches and combiners are widely used for different applications. In this paper, we demonstrate the analytical analysis of effect of phase shifting in multimode inference devices, based on self imaging. This paper shows how self images changes when we introduce phase shift in...
We consider a cognitive radio scenario in which two networks share a licensed spectrum. Primary network is the legitimate network while cognitive radio network utilizes the underutilized frequency sub bands. For this scenario our focus is primarily on controlling the interference to the legitimate user and in addition, to minimize the interference between the secondary users while assuring quality...
Rationale Obstructive sleep apnea and chronic musculoskeletal pain both affect sleep. Sleep architecture of patients suffering from both is largely unknown. Objectives This study seeks to define the sleep architecture of patients with chronic musculoskeletal pain and obstructive sleep apnea. Methods Patients with obstructive sleep apnea diagnosed by sleep study during the past 3 years were included...
Background Parastomal hernia (PH) is a frequent complication of stoma formation, occurring in 35–50 % of patients. Recurrence after repair is common, ranging from 24 to 54 % of cases. We hypothesized that repair using a laparoscopic modified Sugarbaker technique (SB) would result in a superior recurrence rate when compared with other repairs. Methods An Institutional Review Board-approved retrospective...
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