The CoBlitz system was designed to provide efficient large file transfer in a managed infrastructure environment. It uses a content distribution network (CDN) coupled with a swarm-style chunk distribution system to reduce the bandwidth required at origin servers. With 6 months of operation, we have been able to observe its behavior in typical usage, and glean information on how it could be rede...

A key challenge faced by peer-to-peer (P2P) video-ondemand (VoD) systems is their ability, or lack thereof, to provide DVD-like functionality, such as pause, forward and backward seeking (or jumps). Such operations can significantly degrade the performance of a P2P system as arbitrary video segments may need to be served timely on demand. Currently, little is known of the impact that these oper...

In this chapter, the current work on swarm robotics is briefly reviewed. Swarm robotics, inspired from nature swarm, is a combination of swarm intelligence and robotic, and shows great potential in several aspects. Firstly of all, the cooperation in nature swarm and swarm intelligence is briefly introduced, and the special features of the swarm robotics compared with single robot and other mult...

Bio-inspired optimization algorithms have been gaining more popularity recently. One of the most important of these algorithms is particle swarm optimization (PSO). PSO is based on the collective intelligence of a swam of particles. Each particle explores a part of the search space looking for the optimal position and adjusts its position according to two factors; the first is its own experienc...

Swarm [3] is a storage system for Linux that provides scalable, reliable, and cost-e ective data storage. At its lowest level, Swarm implements a logstructured interface to a cluster of storage devices. Above the log, Swarm provides an infrastructure that allows high-level abstractions and functionality to be implemented easily and eÆciently. This paper describes the design and implementation o...

Foursquare is a search and discovery tool which helps users discover venues around the world. Much of the data for these recommendations come from its sister app Swarm, which is a location based social network where users can “check in” to places they visit. Older versions of Foursquare had a strongly static component to its recommendations. For instance, the top restaurants in New York City do...

In this paper, we present a novel multi-modal optimization algorithm for finding multiple local optima in objective function surfaces. We build from Species-based Particle Swarm Optimization (SPSO) by using deterministic sampling to generate new particles during the optimization process, by implementing proximity-based speciation coupled with speciation of isolated particles, and by including “...

In this article, multiple-product PVRP with pickup and delivery that is used widely in goods distribution or other service companies, especially by railways, was introduced. A mathematical formulation was provided for this problem. Each product had a set of vehicles which could carry the product and pickup and delivery could simultaneously occur. To solve the problem, two meta-heuristic methods...