are challenging problems due to the considerable diversity, large numbers, dynamic behavior, and geographical distribution of the entities in which a user might be interested. Consequently, information services are a vital part of any Grid software infrastructure, providing fundamental mechanisms for discovery

or functionality for speed. Few offer resource isolation or performance guarantees; most provide only best-effort provisioning, risking denial of service. This paper presents Xen, an x86 virtual machine monitor which allows multiple commodity operating systems to share conventional hardware in a safe and resource

Cloud computing is a recent advancement wherein IT infrastructure and applications are provided as “services ” to endusers under a usage-based payment model. They can leverage virtualized services even on the fly based on requirements (workload patterns and QoS) varying with time. The application

Heterogeneous wireless sensor networks represent a challenging programming environment. Servilla addresses this by offering a new middleware framework that provides service provisioning. Using Servilla, developers can construct platform-independent applications over a dynamic set of devices

systems of both organizations to facilitate provision of the service. The infrastructure supports fine-grained monitoring and control to allow tight cooperation between the organizations. 1 The CrossFlow context Today, companies focus on their core business and outsource secondary activities to other

present the Hourglass infrastructure, which addresses this need. Hourglass is an Internet-based infrastructure for connecting a wide range of sensors, services, and applications in a robust fashion. In Hourglass, a stream of data elements is routed to one or more applications. These data elements

sensors

of control in terms of APIs. This paper investigates unified concepts, methods, and software infrastructures that support the efficient development of applications across the Internet and the embedded world, minimizing development efforts through flexible data and meta-data driven integration based on

Abstract – Extending healthcare to the community introduces a number of new challenges for the development of information technology infrastructures. A core component of the new selfcare infrastructures will be wearable or implantable sensors and actuators that monitor vital signs and take

-critical service provision, flexible support for business models, and security at all levels in order to ensure privacy of patient data as well as compliance to EU law. Methods: The GEMSS Grid infrastructure is based on a service-oriented architecture and is being built on top of existing standard Grid and Web