Fractal modes in unstable resonators (1999)
Journal Article
Karman, G., Mcdonald, G., New, G., & Woerdman, J. (1999). Fractal modes in unstable resonators. Nature, 402, 138. https://doi.org/10.1038/45960

One of the simplest optical systems, consisting of two mirrors facing each other to form a resonator, turns out to have a surprising property. Here we show that the peculiar eigenmodes of unstable resonators are fractals, a finding that may lead to... Read More about Fractal modes in unstable resonators.

Towards a framework for developing educational software (1999)
Presentation / Conference
Meziane, F., Onn, C., Labadin, J., & Harris, R. (1999, September). Towards a framework for developing educational software. Presented at Proceedings of the International Conference on Information Technology in Asia (CITA 1999),, Kuching, Sarawak

There is a need for review in mathematical education to satisfy a growing demand for graduates that can support research and development in many technical fields. Dissatisfaction with current curriculum has pushed many institutions and countries to r... Read More about Towards a framework for developing educational software.

A study into on-street parking: effects on traffic congestion (1999)
Journal Article
Yousif, S., & Purnawan. (1999). A study into on-street parking: effects on traffic congestion. Traffic engineering & control, 40(9), 424-427

This paper describes the characteristics of vehicle manoeuvres when entering or leaving on-street parking. Those manoeuvres are often ignored by traffic engineers in the design process and the evaluation of traffic management schemes. However, they... Read More about A study into on-street parking: effects on traffic congestion.

Excess noise in low Fresnel number unstable resonators (1999)
Journal Article
Mcdonald, G., New, G., & Woerdman, J. (1999). Excess noise in low Fresnel number unstable resonators. Optics Communications, 164(4-6), 285-295. https://doi.org/10.1016/S0030-4018%2899%2900194-7

Numerical calculations of excess noise factors in low Fresnel number unstable resonators are described in detail. Computed mode profiles in one transverse dimension together with associated Petermann K-factors are presented; dynamical considerations... Read More about Excess noise in low Fresnel number unstable resonators.

Fast algorithm for studying the evolution of optical solitons under perturbations (1999)
Journal Article
Chamorro-Posada, P., Mcdonald, G., New, G., & Fraile-Pelaez, F. (1999). Fast algorithm for studying the evolution of optical solitons under perturbations. IEEE Transactions on Magnetics, 35(3), 1558-1561. https://doi.org/10.1109/20.767268

A numerical algorithm is proposed for computing the eigenvalues of the linear scattering problem associated with the nonlinear Schrodinger equation. The numerical method allows a fast calculation of the dynamical evolution of the properties of optica... Read More about Fast algorithm for studying the evolution of optical solitons under perturbations.

On-street parking manoeuvres and their effects on design (1999)
Presentation / Conference
Purnawan, & Yousif, S. (1999, March). On-street parking manoeuvres and their effects on design. Presented at 4th ISSM, Kassel, Germany

Vehicle manoeuvres when entering or leaving on-street parking can be a contributory factor to causing congestion. Little explicit attention has been given to these manoeuvres and their indirect potential effects on the moving traffic. In the design... Read More about On-street parking manoeuvres and their effects on design.

Combining active learning with inductive logic programming to close the loop in machine learning (1999)
Book Chapter
programming to close the loop in machine learning. In S. Colton (Ed.), Proceedings of AISB'99 Symposium on AI and Scientific Creativity (59-64). The Society for the Study of Artificial Intelligence and Simulation of Behaviour (AISB)

Machine Learning (ML) systems that produce human-comprehensible hypotheses from data are typically open loop, with no direct link between the ML system and the collection of data. This paper describes the alternative, it Closed Loop Machine Learning.... Read More about Combining active learning with inductive logic programming to close the loop in machine learning.

Excess-noise dependence on intracavity aperture shape (1999)
Journal Article
Karman, G., Mcdonald, G., Woerdman, J., & New, G. (1999). Excess-noise dependence on intracavity aperture shape. Applied Optics, 38(33), 6874-6878. https://doi.org/10.1364/AO.38.006874

In lasers with nonorthogonal eigenmodes the excess-noise factor K can be large, especially in unstable-cavity lasers with hard-edged intracavity apertures. To the best of our knowledge, we report the first detailed study of the dependence of K on ape... Read More about Excess-noise dependence on intracavity aperture shape.