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- Anthony Lasenby, Chris Doran, Stephen Gull
- 1997

A new gauge theory of gravity is presented. The theory is constructed in a flat background spacetime and employs gauge fields to ensure that all relations between physical quantities are independent of the positions and orientations of the matter fields. In this manner all properties of the background spacetime are removed from physics, and what remains are… (More)

- Chris Doran, Anthony Lasenby, Stephen Gull, Shyamal Somaroo, Anthony Challinor
- 1996

This paper surveys the application of geometric algebra to the physics of electrons. It first appeared in 1996 and is reproduced here with only minor modifications. Subjects covered include non-relativistic and rela

- David Forbes, Mark Creamer, Andrea Phelps, Richard Bryant, Alexander McFarlane, Grant J Devilly +5 others
- The Australian and New Zealand journal of…
- 2007

Over the past 2-3 years, clinical practice guidelines (CPGs) for post-traumatic stress disorder (PTSD) and acute stress disorder (ASD) have been developed in the USA and UK. There remained a need, however, for the development of Australian CPGs for the treatment of ASD and PTSD tailored to the national health-care context. Therefore, the Australian Centre… (More)

- Chris Doran
- 1999

A new form of the Kerr solution is presented. The solution involves a time coordinate which represents the local proper time for free-falling observers on a set of simple trajectories. Many physical phenomena are particularly clear when related to this time coordinate. The chosen coordinates also ensure that the solution is well behaved at the horizon. The… (More)

Projective geometry provides the preferred framework for most implementations of Euclidean space in graphics applications. Translations and rotations are both linear transformations in projective geometry, which helps when it comes to programming complicated geometrical operations. But there is a fundamental weakness in this approach — the Euclidean… (More)

- Melissa R Haswell, David Kavanagh, Komla Tsey, Lyndon Reilly, Yvonne Cadet-James, Arlene Laliberte +2 others
- The Australian and New Zealand journal of…
- 2010

OBJECTIVE
Empowerment is a complex process of psychological, social, organizational and structural change. It allows individuals and groups to achieve positive growth and effectively address the social and psychological impacts of historical oppression, marginalization and disadvantage. The Growth and Empowerment Measure (GEM) was developed to measure… (More)

- Anthony Lasenby, Chris Doran, Jonathan Pritchard, Alejandro Caceres
- 2008

We compute the spectrum of normalized fermion bound states in a Schwarzschild black hole background. The eigenstates have complex energies. The real part of the energies, for small couplings, closely follow a Hydrogen-like spectrum. The imaginary contributions give decay times for the various states, due to the absorption properties of the hole. As… (More)

- Chris Doran, Anthony Lasenby
- 2002

The differential cross section for scattering of a Dirac particle in a black hole background is found. The result is the gravitational analog of the Mott formula for scattering in a Coulomb background. The equivalence principle is neatly embodied in the cross section, which depends only on the incident velocity, and not the particle mass. The low angle… (More)

- Rachel Parker, Chris Doran
- 2001

When two or more subsystems of a quantum system interact with each other they can become entangled. In this case the individual subsystems can no longer be described as pure quantum states. For systems with only 2 subsystems this entanglement can be described using the Schmidt decomposition. This selects a preferred orthonormal basis for expressing the… (More)

- Anthony Lasenby, Chris Doran
- 2008

We present a new approach to constructing inflationary models in closed universes. Conformal embedding of closed-universe models in a de Sitter background suggests a quantisation condition on the available conformal time. This condition implies that the universe is closed at no greater than the 10% level. When a massive scalar field is introduced to drive… (More)