In this paper we consider a single buffer fluid model where sources arrive according to a Poisson process, and stay in the system for independent and identically distributed (iid) exponential amounts of time and then depart. While they are in the system, they generate fluid traffic that is modulated by iid finite state continuous time Markov chains (CTMC). The fluid in the buffer is drained at ...

Introduction The kidney maintains blood pH by filtering metabolic acids and regenerating blood buffers such as bicarbonate. During CRRT, pH is regulated in a comparable way, metabolic acids are filtered or dialysed and buffer is replaced to correct metabolic acidosis and compensate for the bicarbonate lost by filtration or diffusion. Lactate, bicarbonate, acetate and citrate are the available b...

This paper reports on the performance of deliberately unbalanced, reliable, non-automated and assembly lines that merge, whose workstations differ in terms of their mean operation times. Simulations are carried out on 5and 8-station lines with 1, 2 and 4 buffer capacity units, % degrees of line imbalance of 2, 5 and 12, and 24 different patterns of means imbalance. Data on two performance measu...

We use recent advances from the theory of multivariate stochastic orderings to formalize the “folk theorem” to the effect that positive correlations lead to increased buffer occupancy and larger buffer levels at a discrete-time infinite capacity multiplexer queue. Input sequences will be compared in the supermodular (sm) ordering and buffer contents in the increasing convex (icx) ordering, resp...

A novel single-chip shared buffer ATM switch architecture is presented, in which a Content Addressable Memory (CAM) is used to control access to the shared buffer RAM, in place of a linked list mechanism. Switch operation is explained in detail, and performance is compared to that of a Linked List switch. Memory capacity requirements are decreased, and cell storage and retrieval is simplified. ...

This paper studies the impact of long-range-dependent (LRD) traffic on the performance of a network multiplexer. The network multiplexer is characterized by a multiplexing queue with a finite buffer and an M/G/∞ input process. Our analysis expresses the loss probability bounds using a simple relationship between loss probability and buffer full probability. Our analysis also derives an exact ex...

Over the last decade, importance sampling has been a popular technique for the efficient estimation of rare event probabilities. This paper presents an approach for applying balanced likelihood ratio importance sampling to the problem of quantifying the probability that the content of the second buffer in a two node tandem Jackson network reaches some high level before it becomes empty. Heurist...

In this contribution, we investigate the performance of the output buffer of a video streaming server. We assume that the server encodes the video stream in a scalable way, i.e. the generated video packets contain a base layer ensuring a minimum of guaranteed quality and a stack of additional enhancement layers progressively improving the quality of video. When the output buffer gets congested,...

Address correspondence to P.W. Carr. hen preparing binary eluents containing both an organic solvent and a buffer for a buffer reversed-phase liquid chromatography (LC), one must know the solubility of the buffer in the organic cosolvent to avoid precipitation of the buffer salt. For example, one must know the highest percent organic cosolvent (that is, %B, v/v) in which a buffer salt remains s...

We determined the extent that a riparian buffer reduces stream suspended sediment concentrations by filtering road runoff during 18 rain events in a 2.5-ha, multi-use watershed in northern Thailand. The dominant buffer species was the perennial sedge Fimbristylis aphylla Zoll. ex Steud. (Cyperaceae). We monitored stream sediment concentration for situations where road runoff either flowed into ...