http://hdl.handle.net/10453/148 Fri, 24 May 2013 02:46:20 GMT 2013-05-24T02:46:20Z http://hdl.handle.net/10453/11871 Statistical Foundations of Intelligent Technologies Aboura Khalid Ha, Q. P, Kwok, N. M Intelligent Technologies problems have one common element; uncertainty. Randomness, natural or created, is an important part of the engineering problems in Intelligent Technologies. Modeling it properly and dealing with it in a coherent manner is essential to any solution. In this article, we address the issue of uncertainty in Intelligent Technologies through a classification problem. We look at the problems of pattern recognition and classification, an important area in automation, and use the example to highlight a simple but effective way to deal with uncertainty in complex environments Mon, 01 Jan 2007 00:00:00 GMT http://hdl.handle.net/10453/11871 2007-01-01T00:00:00Z http://hdl.handle.net/10453/10680 Stochastic Deterioration Processes for Bridge Lifetime Assessment Li Jianchun; Aboura Khalid; Crews Keith; Samali Bijan Agbinya, J.I. The Markov chain model can be found in the maintenance and repair problems since the early 60's, is introduced to the maintenance of road infrastructure in the 1980's, and is made to drive the current bridge maintenance optimization systems. While this model results into solvable programming problems and provides a solution, there are a number of criticisms associated with it. In this article, we highlight the shortfalls of the Markov model for bridge infrastructure lifetime assessment and promote the use of stochastic processes. We use examples from a study for the modeling of the condition of bridges that considers more than 15 years of data. We argue for the applicability of the gamma process and other stochastic processes. Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10453/10680 2008-01-01T00:00:00Z http://hdl.handle.net/10453/10679 Laplace transform identities for diffusions, with applications to rebates and barrier options Hulley Hardy; Platen Eckhard Stettner, L Using a simple integral identity, we derive general expressions for the Laplace transform of the transition density of the process, if killing or reflecting boundaries are specified. We also obtain a number of useful expressions for the Laplace transforms of some functions of first-passage times for the diffusion. These results are applied to the special case of squared Bessel processes with killing or reflecting boundaries. In particular, we demonstrate how the above-mentioned integral identity enables us to derive the transition density of a squared Bessel process killed at the origin, without the need to invert a Laplace transform. Finally, as an application, we consider the problem of pricing barrier options on an index described by the minimal market model. Tue, 01 Jan 2008 00:00:00 GMT http://hdl.handle.net/10453/10679 2008-01-01T00:00:00Z http://hdl.handle.net/10453/6651 Cryopreservation of Christmas bush (ceratopetalum gummiferum Ms.) by encapsulation-dehydration methods Mohamad Shatnawi Mohamad; Johnson Krystyna Taji A; Williams R Shoot tips of Christmas bush (Ceratopetalum gummiferum Ms.) derived from in vitro cultures were successfully cryopreserved by the encapsulation-dehydration method. The excised shoot tips were placed for 1 day on hormone free Murashige and Skoog (MS) medium with 0.3 M sucrose. After encapsulation, the beads were precultured on MS liquid medium with 0.5-0.75 M sucrose on the agitator shaker. Beads containing the shoot tips were then dehydrated in the Laminar Air Flow cabinet before being preserved in liquid nitrogen. Our result gives us an easy protocol to preserve in vitro propagated Christmas bush. Tue, 01 Jan 2002 00:00:00 GMT http://hdl.handle.net/10453/6651 2002-01-01T00:00:00Z