We compare structured and unstructured overlays and derive a hybrid overlay that can outperform both. Unstructured overlays build a random graph and use flooding or random walks on that graph to discover data stored by overlay nodes. Structured overlays assign keys to data items and build a graph that maps each key to the node that stores the corresponding data. Unstructured overlays are widely...

Some individuals read more fluently when the text is coloured: i.e., when coloured sheets of plastic (overlays) are placed upon the page, or when coloured lenses are worn. Overlays provide a surface colour whereas lenses mimic a change in the colour of a light source. The neural mechanisms that underlie colour constancy ensure that the chromaticity of overlays and lenses is processed differentl...

The purpose of this study was to assess the color of layered resin overlays and to test the early microhardness of dual cure resin cement (DCRC) light cured through the layered resin overlays. Resin overlays of 1.5 mm thickness were fabricated with the A3 shade of Z350 (Group 1L), the A3B and A3E shades of Supreme XT (Group 2L), and the A3, E3, and T1 shades of Sinfony (Group 3L) using one, two...

Many different overlays with different properties have been proposed. Rather than using one overlay for all applications, it is likely that multiple overlapping overlays will be deployed on the same computing resources for different purposes. We present an architecture, called ODIN-S, for mediating the resources used by overlapping overlays. We can specify priorities for different overlays, and...

Drifting Overlays are dynamic partial network-layer overlays with traffic ‘safe houses’ that enterprises can use to control, at fine granularity, the reachability and predictability of paths taken to important hosts. Drifting Overlays enable enterprises a level of control over their own DDoS defenses and routing choices, rather than leaving them at the mercy of their ISPs. KeywordsVPNs, Securit...

Overlays are an important tool for deploying new services on the Internet. However, the existing overlays are statically configured. For fault tolerance, ease of management, and efficiency it is crucial that overlays be self-organizing. We present a distributed algorithm to automatically configure the nodes into a logical topology which is dynamic and efficient.