Thomas Ranken Lyle Medal

:Professor Yuri Kivshar, Head, Nonlinear Physics Centre, Research School of Physical Sciences and Engineering, Australian National University

:Yuri Kivshar is a world leader in nonlinear physics and optics, widely recognised for his contributions to our understanding of self-trapping and energy localisation, pioneering results in the theory of optical solitons and vortices, and the world-first predictions of many important effects in nonlinear physics of periodic photonic structures. Most of his theoretical predictions have been verified and demonstrated experimentally. Yuri is a leading figure in the interchange of ideas between nonlinear optics and atom optics. His research is multidisciplinary in background and focus.

:Professor Victor Flambaum FAA, Scientia Professor and Chair of Theoretical Physics, School of Physics, The University of New South Wales

:Victor Flambaum has performed pioneering research in the area of the violation of fundamental symmetries and tests of unification theories of elementary particles. With collaborators he developed a new method to perform the most accurate atomic calculations of parity violation. These calculations allowed the standard model of elementary particles to be tested. Recently he proposed new ideas which have led to fresh directions in the search for variations of the fundamental constants of nature, including astrophysics (Big Bang nucleosynthesis, quasar spectra), nuclear physics (nuclear clock), and atomic and molecular spectroscopy (atomic clocks).

:Professor James Stanislaus Williams FAA, Director, Research School of Physics and Engineering, Australian National University

:James Williams developed ion implantation processes which are widely used in the microelectronics industry for manufacturing computer chips. He has developed phase change memory technology based on silicon which is expected to play an important role in next generation of high density memory devices. His work on compound semiconductors has made an impact in optoelectronic device technology. He has provided exceptional leadership in materials science in Australia and is highly regarded internationally for his contributions in electronic materials.

:Professor Cheryl Elisabeth Praeger AM FAA, School of Mathematics and Statistics, The University of Western Australia

:Professor Cheryl Praeger has transformed our understanding of groups acting on large systems, producing new theories, algorithms and designs that have advanced every �field that exploits the symmetry of large systems. Her research has led to significant new directions taken up by mathematicians internationally. Her algorithms have enhanced powerful computer algebra systems which have transformed research and teaching of algebra.