The Message Minimizing Load Redistribution Problem is described which arises from the need to redistribute work when performing load balancing in a parallel computing environment. We consider a global perspective and seek a redistribution plan that minimizes the overall processing time. We de ne the cost associated with a solution to be the number of packets needed to balance out the workload. ...

The Northern Hemisphere temperature response to volcanic and solar forcing in the time interval 1000– 1850 AD is studied using first a set of simulations with an intermediate-complexity climate model, driven by reconstructed forcings. Results are then compared with those obtained from the seven high-resolution reconstructed temperature records for the last millenium that are at present availabl...

This paper presents a model of dialogue initiative within a collaborative discourse. The importance of varying initiative between participants is validated both in theory and in experiments. For example, it was found that one initiative setting algorithm was up to 50% better than if initiative is random. Furthermore, a method for varying levels of initiative between participants is presented wh...

Many railroad lines are approaching the limits of practical capacity, and the estimated future demand is projected to increase 88% by 2035. Therefore, identifying a good multiyear capacity expansion plan has become a particularly timely and important objective for railroads. In this research, we have developed an enhanced parametric capacity evaluation tool to assist railroad companies in capac...

We discuss an inverse approach to Structure-from-Motion that enables the geolocation of an unmanned aerial system using a single, two-dimensional image correlated to a digital surface model. This approach allows the calculation of airborne xyz position coordinates as well as the orientation parameters of omega (ù), phi (ö), and kappa (ê). This theoretical investigation with idealized models see...

Inspired by the abilities of the praying mantis to judge distance to its prey before the strike by use of motion-based visually mediated odometry, we create miniature model for depth estimation that are similar to the head movements of the Praying Mantis. We develop mathematical models of the praying mantis behavior and describe our implementations and experimental environment. We investigate s...

Inspired by the abilities of both the praying mantis and the pigeon to judge distance by use of motionbased visually mediated odometry, we create miniature models for depth estimation that are similar to the head movements of these animals. We develop mathematical models of the praying mantis and pigeon visual behavior and describe our implementations and experimental environment. We investigat...

Activation of Cdc14 phosphatase, controlled by a signalling cascade known as the mitotic exit network, is the final switch that drives cells from mitosis into the next cell cycle. The recent discovery of a novel network that regulates early Cdc14 activation has revealed the unexpected existence of a two-step control of mitotic exit.