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This paper studies the ergodic capacity of multiple-input multiple-output (MIMO) correlated Gamma-Gamma (G-G) fading channels, particularly for free-space optical communications (FSO). Based on the atmospheric fading correlation analysis and by employing an approximation method for the sum of correlated (G-G) random variables (RVs), closed-form expressions for the capacity are derived for both equal...
It has been well-known in optical wireless communications (OWC) that both spatial and cooperative diversities are effective methods for mitigating the impact of fading channels. Cooperative diversity based on multihop relaying could significantly improve the system performance, especially over long distances, its cost is nevertheless increased proportionally with the increase of the number of hops...
Supply chains are becoming more vulnerable because of harsher and more frequent natural and man-made disasters. Supply chain disruptions now seem to occur more frequently and with more serious consequences. During and after supply chain disruptions, companies may lose revenue and incur high recovery costs. Therefore, if supply chain managers were able to better measure and manage supply chain vulnerability,...
In Optical Burst Switching (OBS) networks, Just-in-Time (JIT) is a simple resource reservation scheme, which does not involve complex scheduling and is amenable to hardware implementation. However, in OBS networks using JIT, the header processing time is a main factor that affects the network performance since it is included in resource reservation time. In this paper, we propose a novel optical code...
To correlate magnetic resonance imaging (MRI) aspects of the femoral head with histological findings in advanced hip osteoarthritis (OA), with special emphasis on bone marrow edema (BME).MRI was performed in patients with advanced hip OA scheduled for hip arthroplasty. Coronal T1-, fat-suppressed T2-, T1 with gadolinium intravenous injection sequences were obtained on a 1.5T MR-scanner within 1 month...
This paper focuses on dynamical role divisions of cooperation interaction between two human subjects in a typical cooperation task, the crank-rotation task. The dynamical role division in which each subject plays a specialized role without conscious understanding is a key issue that brings the efficiency to the performance of the crank-cooperation work. By investigating kinetics and muscle activities,...
This paper describes a new analysis method dedicated to the comparison of human gestures. The orientations and the positions of the gestures are first digitized using active 3D sensors and then compared to a 6-D template using curvature analysis. The proposed algorithm first starts by computing the invariant curvature of 3D position and orientation of a surgical tool using Frenet-Serret frames in...
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