the unsteady free convection flow between two long vertical parallel plates withvariable temperature and mass diffusion in the presence of the thermal radiation hasbeen presented. the governing dimensionless coupled linear partial differentialequations on the flow are solved by using the laplace transform technique. theexact solutions have been obtained for the fluid velocity, temperature and t...

An introduction to random ßuctuations in the refractive index of air and their effect on optical images, including the impact on MTF. The aim of these notes is to study, in an introductory way, random ßuctuations in the refractive index of air and their effect on optical images. Image quality is measured by a modulation transfer function (MTF) that characterizes the turbulent viewing, and also ...

We introduce a model for communication costs in parallel processing environments, called the "hyperbolic model," which generalizes two-parameter dedicated-link models in an analytically simple way. Dedicated interprocessor links parameterized by a latency and a transfer rate that are independent of load are assumed by many existing communication models; such models are unrealistic for workstati...