In this paper, we present a low latency media access control scheme which we call LLMAC (Low Latency MAC) for event-driven wireless sensor networks (WSN). In this kind of WSN, sensors do not regularly send data to the sink. They send a burst data only when there is an event in the monitoring area. It takes time for this burst data to arrive to the sink. Normally, these events are critical and w...

Conclusions Performability models of multiprocessor systems and their evaluation are presented. Two cases in which hierarchical modeling is applied are examined. 1. Models are developed to analyze the behavior of processor arrays of various sizes in the presence of permanent, transient, intermittent, and near-coincident faults. Models can be generated for typical reconfiguration schemes that co...

ATM Forum Document Number: ATM_Forum/99-0045 ************************************************************************ Title: Throughput Fairness Index: An Explanation ************************************************************************ Abstract: The performance testing document uses a particular function to quantify fairness. This contribution explains the reasons for the selection of the p...

Computational Grid allows customers to submit tasks to service providers. To maintain the availability, fairness and performance, it is critical to protect Computational Grid systems from malicious participants. Current solutions to this problem assume that the system would contain either malicious consumers only or malicious service provider only. However, in the real world, both consumers and...

In current wireless LANs multiple kinds of losses occur (i.e., channel errors, collisions, interference). In this paper we examine the extent to which loss differentiation based physical layer transmission bit–rate and contention window adaptation aids in improving network performance. We show that loss differentiation can have a positive impact on performance, especially in low contention scen...

30 English translation © 2006 M.E. Sharpe, Inc., from the Russian text “‘Edinitsy’ i urovni deiatel’nosti,” in Iazyk i rechevaia deiatel’nost’ v obshchei i pedagogicheskoi psikhologii (Moscow and Voronezh: IPO MODEK, 2001), pp. 66– 82. Published with the permission of Dmitry A. Leontiev. Translated by Nora Favorov. Journal of Russian and East European Psychology, vol. 44, no. 3, May–June 2006, ...

Problem statement: Forecasting is simple; producing accurate forecasts is the essential task. Experience suggests that financial managers often assume that because models used in forecasting are appropriate that they are effective. This study addresses this assumption. Effective is taken to mean forecasts where the Absolute Percentage Error (APE) is equal to or less than 10%. It has been report...