We study the performance of the Constant Bit Rate (CBR) and the interpolated ON-OFF voice over the differentiated services Internet. Both the Premium and Assured services are tested, and their relative performance is investigated. Using these services, at the DS3 rate, the call handling capacity can be doubled, at the expense of packetization delay and a few milliseconds packet delay. Also, at ...

This paper describes a system that supports high availability of data, until the data should be expunged, at which time it is impossible to recover the data. This design supports assured deletion of files. As we can now outsource data backup to third-party cloud storage services so as to reduce data management costs, security concerns arise in terms of ensuring the privacy and integrity of outs...

The Internet is currently facing a twofold challenge: to increase network capacity in order to accommodate a steadily increasing number of users, and to guarantee the Quality of Service for existing applications as well as for new multimedia applications requiring real-time network response. In order to meet these requirements, the Internet Engineering Task Force is currently defining the Diffe...

This paper extends the authors earlier proposal for providing Ada with support for fine-grained parallelism with an execution model based on the concept of ab-stract executors, detailing the progress guarantees that these executors must pro-vide and how these can be assured even in the presence of potentially blocking operations. The paper also describes how this execution model can be applied ...

In the developing world, laboratory services for sexually transmitted infections (STIs) are either not available, or where limited services are available, patients may not be able to pay for or physically access those services. Despite the existence of national policy for antenatal screening to prevent congenital syphilis and substantial evidence that antenatal screening is cost-effective, impl...

The Internet today mostly offers a simple best-effort mode of service. The capabilities of the Internet will be significantly enhanced if it supports better QoS modes, especially when QoS is provided for end-to-end services. This enhancement in the Internet’s capabilities requires both technological development and economic mechanisms to support better QoS service modes. In this article, we stu...