Elementary congestion models sometimes require analysis of G/G/l systems with hypere.xponentially distributed interarrival time and service time distributions. It is shown that for such systems, the ergodic waiting time distribution is itself hypere.xponentially distributed. A simple computational procedure is provided to fmd the parameters needed. Green's function methods are employed to motiv...

MCAIDS-Machine Code Analysis Intrusion Detection System for blocking code-injection buffer overflow attack messages targeting at various Internet services such as web service. With the increasing access of Internet,the Internet threat takes a form of attack, targetting individuals users to gain control over network and data. Buffer overlow is one of the most occuring security vulnerability in c...

In this paper we study the rare event of overflow in a Markov fluid queue with finite buffer and many input sources. The probability of this rare event will be estimated by simulations. We present a highly efficient importance sampling procedure to speed up the simulations. The implemented change of meausure is suggested after a large deviations analysis of the overflow probability. This analys...

due to the importance of material classification issue in grinding circuits, the ‎performance of primary and secondary hydrocyclones in grinding circuit of esfordi ‎phosphate plant was investigated by sampling within 7 days from feed, overflow, and ‎underflow‎ of these hydrocyclones. at first, the d80 of above streams samples were calculated by ‎the screening analysis. the results showed ‎that ...

As a collaborative effort among government aerospace research laboratories, an advanced version of a widely used computational fluid dynamics code, OVERFLOW2.1z, was recently released. This latest version includes additions to model multiple flexible, rotating blades. This paper describes how the OVERFLOW code is applied to improve the accuracy of airload computations from the linear lifting li...

Newtown Creek is an industrial waterway and former tidal wetland in New York City. It is one of the most polluted water bodies in the United States and was designated as a superfund site in 2010. For over a century, organic compounds, heavy metals, and other forms of industrial pollution have disrupted the creek’s environment. The creek is also impacted by discharges from twenty combined sewer ...

Residue Number System (RNS) is a non-weighted number system for integer number arithmetic, which is based on the residues of a number to a certain set of numbers called module set. The main characteristics and advantage of residue number system is reducing carry propagation in calculations. The elimination of carry propagation leads to the possibility of maximizing parallel processing and reduc...

This paper describes StackFences, a run-time technique for detecting overflows in local variables in C programs. This technique is different from all others developed so far because it tries to detect explicit overflow occurrences, instead of detecting if a particular stack value, namely a return address, was corrupted because of a stack overflow. Thus, StackFences is useful not only for detect...