One way a malicious insider can attack a network is by masquerading as a different user. Various algorithms have been proposed in an effort to detect when a user masquerade attack has occurred. In this paper, two unsupervised algorithms are proposed with the intended goal of detecting user masquerade attacks. The effectiveness of these two unsupervised algorithms are then compared against super...

A quasi-Newton algorithm using the BFGS update is one of the most widely used unconstrained numerical optimisation algorithms. We describe three parallel algorithms to perform the BFGS update on a local memory MIMD architecture such as . These algorithms are distinguished by the way in which Hessian information is stored. Cost models are developed for the algorithms and used to compare their pe...

Signature-based algorithms is a popular kind of algorithms for computing Gröbner bases, and many related papers have been published recently. In this paper, no new signature-based algorithms and no new proofs are presented. Instead, a view of signature-based algorithms is given, that is, signature-based algorithms can be regarded as an extended version of the famous MMM algorithm. By this view,...

This paper shows how evolutionary algorithms can be described in a concise, yet comprehensive and accurate way. A classification scheme is introduced and presented in a tabular form called TEA (Table of Evolutionary Algorithms). It distinguishes between different classes of evolutionary algorithms (e.g., genetic algorithms, ant systems) by enumerating the fundamental ingredients of each of thes...

Many numerical simulations in quantum (bilinear) control use monotonically convergent algorithms. A relevant time discretization has already been proposed for these algorithms. We present here a way to apply these algorithms to the control of molecular orientation and alignment. Numerical results that illustrate some of the properties of these algorithms are given.

economics has hit the mainstream in the last decade with popular books like freakonomics and the undercover economist reaching the masses. these authors have used their toolkits far beyond the narrow scope of money and finance and answered questions pertaining to anything from social policy to demographics to crime. their appeal has largely been their ability to explain that small underlying fo...