The pH and buffer capacity of two soils increased or remained constant after incubation with different amounts of plant material (lucerne chaff) at field capacity and when air dry. For both soils, the pH changes were greater at field capacity, whereas the buffer capacities were independent of the water treatments. The pH changes observed could be explained in terms of the organic anion concentr...

Multiple time scale models are an attractive alternative to longrange dependence models via heavy tails. They are Markovian models, hence analyzable, and capture some of the key phenomena manifest in long-range dependence. We analyze extensions of the AMS model of ATM traffic. The models includes both open types (where connection arrive and leave), and closed, fixed-population types. Connection...

This paper evaluates the gain in throughput achieved by the use of a shared buffer to realize the output queues of switching elements in the presence of self-similar multimedia traffic. Unlike previous studies, we focus on credit-based systems typical of networks used in parallel multimedia servers. It is generally believed that buffer sharing improves performance in the presence of non-uniform...

Background and Objectives: A sudden jump in blood demand during natural disasters may have strong negative impact on the performance of blood supply chain. Appropriate response to emergency situations requires predictive approach to determining the optimal allocation of blood supply chain resources for various disaster scenarios. The present study, thus, presents an optimization model aimed at ...

This paper considers VBR transmission of multiple real-time videos over ATM networks. Multiple real-time VBR video sources are multiplexed into an ATM switch to transmit cells into the network. Given the ATM switch capacity, the problem is to dynamically allocate the required channel bandwidth for each video source such that the encoder buffer occupancy is maintained at a target level. To solve...

Three-dimensional (3-D) integration technology provides various architectural opportunities including huge memory bandwidth. This paper proposes versatile stream buffer architecture to work as a secondary victim cache as well as the conventional stream buffer. The versatile stream buffer utilizes empty spaces to exploit massive memory bandwidth provided by 3-D integration technology and to redu...

An objective of the next. generation network is the accommodation of services wit,h different QoS requirements. This indicates that the network should provide special mechanisms in order to prioritize the access to network node resources, such as link capacity and buffer space. We studied the performance of sharing buffer space and link capacity bet.ween sessions, the traffic of which is modele...

Emulation of Output Queuing (OQ) switches using Combined Input-Output Queuing (CIOQ) switches has been studied extensively in the setting where the switch buffers have unlimited capacity. In this paper we study the general setting where the OQ switch and the CIOQ switch have finite buffer capacity B ≥ 1 packets at every output. We analyze the resource requirements of CIOQ policies in terms of t...