Electrochemically codeposited reduced graphene oxide and palladium nanoparticles: An efficient heterogeneous catalyst for Heck coupling reaction

AbstractThe catalytic activity of electrochemically codeposited reduced graphene oxide and palladium (ERGO-Pd) was examined for Heck coupling reactions. It showed excellent catalytic activity and stability for Heck coupling reaction. The prepared catalyst (ERGO-Pd) can be used up to the 5th cycle with negligible loss in activity

A Distributed Control Law for Load Balancing in Content Delivery Networks

Large Internet-scale distributed systems deploy hundreds of thousands of servers in thousands of data centers around the world. Internet-scale distributed system to have emerged in the past decade is the content delivery network (CDN, for short) that delivers web content, web and IP-based applications, downloads, and streaming media to end-users (i.e., clients) around the world. This paper focuses on the main research areas in the field of CDN, pointing out the motivations, and analyzing the existing strategies for replica placement and management, server measurement, best fit replica selection and request redirection. In this paper, I face the challenging issue of defining and implementing an effective law for load balancing in Content Delivery Networks. A formal study of a CDN system, carried out through the exploitation of a fluid flow model characterization of the network of servers. This result is then leveraged in order to devise a novel distributed and time-continuous algorithm for load balancing