Attached ultrasonic sensors can detect changes caused by crack initiation and growth if the wave path is directed through the area of critical crack formation. Dynamics of cracks opening and closing under load cause nonlinear modulation of received ultrasonic signals, enabling small cracks to be detected by stationary sensors. A methodology is presented based upon the behavior of ultrasonic sig...

Whilst there has been considerable research into the potential uses of digital games in the classroom, there has been less investigation into the educational value of Alternate Reality Games (ARGs). Unlike console or computer games, in ARGs the game-world is constructed through a combination of onand off-screen media, and is created and shaped through dynamic dialogue between the designers and ...

We present a method for load balancing parallel sorting on heterogeneous networks of workstations and clusters. Load balancing is achieved by exploiting information about the available throughput of the processors. First, the problem is partitioned into subproblems such that the times taken by the processors to solve the subproblems are balanced. Determining the partition involves solving a non...

Multi-path routing represents a promising routing method for wireless mobile ad hoc networks. Multi-path routing achieves load balancing and is more resilient to route failures. Recently, numerous multi-path routing protocols have been proposed for wireless mobile ad hoc networks. Performance evaluations of these protocols showed that they achieve lower routing overhead, lower end-to-end delay ...

This paper studies the problem of signal-quality-guaranteed lightpath provisioning in survivable translucent optical networks under dynamic traffic. A new protection scheme, called regeneration-segment protection (RSP), is proposed. Provisioning approaches with shared path protection and shared RSP are presented. Two main signal quality constraints are integrated with the provisioning problem. ...

This paper presents a scalability and load balancing study of the All-Path protocols, a family of distributed switching protocols based on path exploration. ARP-Path is the main protocol and it explores every possible path reaching from source to destination by using ARP messages, selecting the lowest latency path. Flow-Path and Bridge-Path are respectively the flow-based and bridge-based versi...

Path integral control solves a class of stochastic optimal control problems with a Monte Carlo (MC) method for an associated Hamilton-Jacobi-Bellman (HJB) equation. The MC approach avoids the need for a global grid of the domain of the HJB equation and, therefore, path integral control is in principle applicable to control problems of moderate to large dimension. The class of problems path inte...

It is difficult to trace back the history of the shortest path problem. One can imagine that even in very primitive (even animal) societies, finding short paths (for instance, to food) is essential. Compared with other combinatorial optimization problems, like shortest spanning tree, assignment and transportation, the mathematical research in the shortest path problem started relatively late. T...