In this paper, we propose a two-tiered colorless WDM-OFDMA PON system architecture that draws strengths from each individual WDM and OFDM PON systems. Specifically, the two-tiered architecture enables a colorless transceiver to be shared by a group of ONUs, resulting in drastic reduction of the system cost. For achieving colorlessness via reusing downstream light sources, we discover the residu...

Fuzzy based Priority Scheduler for WiMAX with Improved QoS constraints Prof. D. David Neels Pon Kumar Department of ECE, Einstein College of Engineering, Tirunelveli, India, Email: [email protected] Dr. K. Murugesan Professor and Head, Department of ECE , Sree Sastha Institute of Engineering, Chennai, India, Email: [email protected] Prof. K. Arun Kumar Department of ECE, Einstein Col...

Accurate deleteriousness prediction for nonsynonymous variants is crucial for distinguishing pathogenic mutations from background polymorphisms in whole exome sequencing (WES) studies. Although many deleteriousness prediction methods have been developed, their prediction results are sometimes inconsistent with each other and their relative merits are still unclear in practical applications. To ...

Dynamic bandwidth allocation for upstream transmission in EPONs has gathered significant attention. Maximizing utilization is inversely related to dynamic bandwidth allocation. We propose an auctioning mechanism for bandwidth allocation with a view to dissolution of the paradox between efficiency (utilization) and dynamism. While conventional bandwidth auctioning schemes pose efficiency as well...

Stuart Walker University of Essex. Wivenhoe Park. Colchester. UK [email protected] Terry Quinlan University of Essex. Wivenhoe Park. Colchester. UK [email protected] Emilio Hugues Salas University of Essex. Wivenhoe Park. Colchester. UK [email protected] Rouzbeh Razavi University of Essex. Wivenhoe Park. Colchester. UK [email protected] Tahmina Ajmal University of Essex. Wivenhoe Park. Col...

Rapidly sinking fecal pellets are an important component of the vertical flux of particulate organic matter (POM) from the surface to the ocean's interior; however, few studies have examined the role fish play in this export. We determined abundance, size, prey composition, particulate organic carbon/nitrogen (POC/PON), and sinking rates of fecal pellets produced by a forage fish, likely the no...

Data from a global network of large, permanent plots in lowland tropical forests demonstrate (1) that the phenomenon of tropical tree rarity is real and (2) that almost all the species diversity in such forests is due to rare species. Theoretical and empirically based reasoning suggests that many of these rare species are not as geographically widespread as previously thought. These findings su...

Indigenous populations of the Tibetan plateau have attracted much attention for their good performance at extreme high altitude. Most genetic studies of Tibetan adaptations have used genetic variation data at the genome scale, while genetic inferences about their demography and population structure are largely based on uniparental markers. To provide genome-wide information on population struct...