Creating a cost-effective large-scale multi-tier Enterprise service requires judicious selection and configuration of infrastructure elements and mechanisms. The minimum cost solution that satisfies business requirements for service availability and performance should be identified. Emerging self-managed computing utility environments demand an automated solution to this problem. This solution ...

An object-oriented modeling infrastructure using the Javabased, Silk simulation classes is defined that enables the simulation of multitasking, distributed systems using symmetric multiprocessors. The simulation infrastructure is being used to evaluate alternative architectures for embedded, distributed systems. We show how the underlying structure is adapted to several different applications, ...

Exposure to airborne biological hazards in an ever expanding urban transport infrastructure and highly diverse mobile population is of growing concern, in terms of both public health and biosecurity. The existing policies and practices on design, construction and operation of these infrastructures may have severe implications for airborne disease transmission, particularly, in the event of a pa...

To build a sustainable space transportation system for human exploration, the design and deployment of infrastructure, such as in situ resource utilization plants, in-orbit propellant depots, on-orbit servicing platforms, are critical. The analysis trade studies these space-infrastructure systems require consideration not only infrastructure elements themselves, but also their supporting (e.g.,...

We propose an efficient and flexible system for a secure and authentic data exchange in a multiinstitutional environment, where the institutions maintain different databases and provide secure and limited access services to employees of other institutions. The main motivation for building such a system was to organize efficient cooperative use of state registers, in order to increase the effici...