Peer-to-peer overlay networks offer a novel platform for a variety of scalable and decentralized distributed applications. Systems known as Distributed Hash Tables provide efficient and fault-tolerant routing, object location and load balancing within a self-organizing overlay network. The alternative solution we propose is an overlay location and routing infrastructure that efficiently uses mi...

Adaptive measurement-based overlay networks offer increased performance and resilience to benign failures for end-to-end communication by using aggressive adaptivity mechanisms. These mechanisms dynamically optimize applicationcentric metrics such as latency, jitter, bandwidth, and loss rate. However, end-systems are more vulnerable than core routers, making overlay networks susceptible to mali...

The deep mounting of CFRP strips to masonry using a flexible adhesive was developed as minimally-invasive and cost-effective out-of-plane seismic retrofitting technique for unreinforced (URM) buildings. Previous experiments on one-way spanning full-scale walls confirmed the significant added value lateral resistance displacement capacity Flexible Deep Mounted (FDM) retrofitted with respect maso...

We discuss what kind of overlay topology should be proactively built before an overlay routing protocol enters a route search process on top of it. The basic overlay structures we study are the K-Nearest Neighbours overlay topologies, connecting every overlay node to its K nearest peers. We introduce a family of optimizations, based on a pruning rule. As flooding is a key component of many rout...

A perennial problem in vector overlay is fuzzy creep. Commercial vector overlay algorithms resolve near intersections of lines employing arbitrary node movement to align two chains at nodes selected randomly in the area of an epsilon band. While this solution is effective in reducing the number of sliver polygons, it introduces distortion. In some situations this distortion may be tolerable, bu...

Overlay networks are emerging as a platform to enhance the core network routing functionality. They form a new network layer on top of the Internet and offer a whole range of network enhancements, such as extra resilience, QoS (Quality of Service) support and overlay multicasting. This paper discusses how an overlay network is used to provide an end-toend QoS enabled multicast network. It descr...

The application of structured overlay networks to implement index structures for data-oriented applications such as peer-to-peer databases or peer-to-peer information retrieval, requires highly efficient approaches for overlay construction, as changing application requirements frequently lead to re-indexing of the data and hence (re)construction of overlay networks. This problem has so far not ...

We report a methodology for the design of low-loss, high-reflectivity, amorphous silicon, overlay DBRs for glass waveguide devices. In order to improve the DBR reflectivity while minimizing the DBR-induced loss, we theoretically determine the optimum overlay thickness and establish an iterative deposition procedure to achieve this value. Details of the design criteria, measurement of the design...