52 research outputs found
Scotland’s image of Ireland: Scott, Small, and the Edinburgh Edition
No full textCo-author, with Alasdair Thanisch, ‘Scotland’s Image of Ireland: Scott, Small, and the Edinburgh Edition’, in Denna Iammarino, Maryclaire Moroney and Thomas Herron (eds.), John Derricke’s Image of Ireland in Context, Manchester Spenser Series (Manchester: Manchester University Press, 2020)
Proceedings of the 2022 Computational Techniques and Applications Conference
No full textCTAC 2022
Queensland University of Technology, Brisbane, Australia 29 November – 2 December, 2022
The 21st Biennial Computational Techniques and Appli- cations Conference (CTAC-2022) was hosted by the School of Mathematical Sciences and Centre for Data Science at Queensland University of Technology in Brisbane.
The ANZIAM Special Interest Group in Computational Mathematics is responsible for this series of conferences, the first of which was held in 1981. The meeting provides an interactive forum for researchers interested in the de- velopment and use of computational methods applied to engineering, scientific and other problems. Participants of the conference are able to submit a short article based on their presentation for publication in this special section of the ANZIAM Journal (Electronic Supplement). The ed- itors, Tim Moroney, Qianqian Yang, Vivien Challis and Elliot Carr, thank the referees whose efforts have helped improve the quality of these conference proceedings.
This Special Section of the ANZIAM Journal (Electronic Supplement) contains the refereed conference papers. The eight keynote presentations were as follows.
Chris Drovandi, Queensland University of TechnologyLikelihood-Free Bayesian Inference and Model Mis- specification
Jennifer Flegg, The University of Melbourne Mathematical Modelling of Avascular Tumour Growth
Frances Kuo, The University of New South Wales
Lattice Meets Lattice—Application of Lattice Cuba- ture to Models in Lattice Gauge Theory
Christian Lubich, University of Tuebingen Convergent evolving surface finite element algo- rithms for geometric evolution equations
Marco Palombo, Cardiff University Perspectives on AI-powered brain microstructure imaging
Emilie Sauret, Queensland University of TechnologyA hybrid Lattice Boltzmann approach for simulating viscoelastic instabilities and elastic turbulence
Karen E Willcox, The University of Texas at Austin
Predictive Digital Twins: From Aerospace Engineer- ing to Computational Oncology
Andy Wilkins, CSIROThe Importance of Mathematics
The presentation by Andy Wilkins was a public lecture. The conference attracted 76 registered participants, and featured a total of 54 contributed talks.
CTAC2022 Organising Committee (QUT)
• Tim Moroney • Qianqian Yang • Ian Turner• Vivien Challis • Elliot Carr• Sarie Gould
CTAC2022 Scientific Committee
• Kevin Burrage (QUT)• Vivien Challis (QUT)• Frances Kuo (UNSW)• Bishnu Lamichhane (Newcastle) • Quoc Thong Le Gia (UNSW)
• Fawang Liu (QUT)• William Mclean (UNSW) • Tim Moroney (QUT)• Linda Stals (ANU)• Ian Turner (QUT)• Qianqian Yang (QUT)
Acknowledgements QUT acknowledges the Turrbal and Yugara, as the First Nations owners of the lands where QUT now stands. We pay respect to their Elders, lores, customs and creation spirits. We recognise that these lands have always been places of teaching, research and learning. QUT acknowledges the important role Aborigi- nal and Torres Strait Islander people play within the QUT community.
We gratefully acknowledge support from the following sponsors:
School of Mathematical Sciences, QUT
Centre for Data Science, QUT
Modelling and Simulation Society of Australia and New Zealand Inc
Mathematics of Computation and Optimization (MoCaO) special interest group of the Australian Mathematical Society
The ANZIAM Student Support Schem
An Annotated Bibliography of Objective Pilot Performance Measures
No full textFINAL REPORT - February-September 1981Author William F. Moroney taught at NPS in Operations Research and Naval Aviation Safety. Author Ted R. Mixon was a student in Operations Research.Buckout's review in 1962 was the last comprehensive examination of the pilot performance measurement PPM literature. This annotated bibliography attempts to 1 gather the PPM literature written subsequent to 1962 into one source 2 describe the scenarios and measures used in collecting PPM data and 3 summarize the major premises and findings of each article. A variety of sources including computer aided literature search were used to identify candidate articles. Ultimately all referenced material was divided into three categories 1 objective pilot performance measurement 2 subjective pilot performance measures and 3 general analysis and review articles.Approved for public release; distribution is unlimited
A comparison of finite difference and finite volume methods for solving the space-fractional advection-dispersion equation with variable coefficients
No full textTransport processes within heterogeneous media may exhibit non- classical diffusion or dispersion which is not adequately described by the classical theory of Brownian motion and Fick’s law. We consider a space-fractional advection-dispersion equation based on a fractional Fick’s law. Zhang et al. [Water Resources Research, 43(5)(2007)] considered such an equation with variable coefficients, which they dis- cretised using the finite difference method proposed by Meerschaert and Tadjeran [Journal of Computational and Applied Mathematics, 172(1):65-77 (2004)]. For this method the presence of variable coef- ficients necessitates applying the product rule before discretising the Riemann–Liouville fractional derivatives using standard and shifted Gru ̈nwald formulas, depending on the fractional order. As an alternative, we propose using a finite volume method that deals directly with the equation in conservative form. Fractionally-shifted Gru ̈nwald formulas are used to discretise the Riemann–Liouville fractional derivatives at control volume faces, eliminating the need for product rule expansions. We compare the two methods for several case studies, highlighting the convenience of the finite volume approach
A mass-conservative control volume-finite element method for solving Richards’ equation in heterogeneous porous media
No full textWe present a mass-conservative vertex-centred finite volume method for efficiently solving the mixed form of Richards’ equation in heterogeneous porous media. The spatial discretisation is particularly well-suited to heterogeneous media because it produces consistent flux approximations at quadrature points where material properties are continuous. Combined with the method of lines, the spatial discretisation gives a set of differential algebraic equations amenable to solution using higher-order implicit solvers. We investigate the solution of the mixed form using a Jacobian-free inexact Newton solver, which requires the solution of an extra variable for each node in the mesh compared to the pressure-head form. By exploiting the structure of the Jacobian for the mixed form, the size of the preconditioner is reduced to that for the pressure-head form, and there is minimal computational overhead for solving the mixed form.\ud
\ud
The proposed formulation is tested on two challenging test problems. The solutions from the new formulation offer conservation of mass at least one order of magnitude more accurate than a pressure head formulation, and the higher-order temporal integration significantly improves both the mass balance and computational efficiency of the solution.\u
1970-71 Brock Generals Hockey Team
No full text1970-71 Brock Generals Hockey team. The members from left to right - Back row: Tom Kearney (trainer), Joel Finlay, Tony Grey, Gregg Carrigan, Craig Morrison, Pat Moroney, Rick Charron, Jim Swain, Bill Fuller, Barry Hopkins, Mike McNiven, Rick Sullivan, Ed Barszcz, Phil McCann, Randy Oiling (Manager), Al Kellogg (Coach). Front row: Wayne Butt, Ron Powell, Tim Goodman, Pat McCann, Arkell Farr, Dave Perrin, Gregg Law. Missing: Jeff Della Vedova
Exploring Mother-Child Relationships in the Context of Early Environmental Stressors
No full textThe attached document may provide the author's accepted version of a published work. See Citation for details of the published work
Novel numerical methods for time-space fractional reaction diffusion equations in two dimensions
No full textWe consider time-space fractional reaction diffusion equations in two dimensions. This equation is obtained from the standard reaction diffusion equation by replacing the first order time derivative with the Caputo fractional derivative, and the second order space derivatives with the fractional Laplacian. Using the matrix transfer technique proposed by Ilic, Liu, Turner and Anh [Fract. Calc. Appl. Anal., 9:333-349, 2006] and the numerical solution strategy used by Yang, Turner, Liu, and Ilic [SIAM J. Scientific Computing, 33:1159-1180, 2011], the solution of the time-space fractional reaction diffusion equations in two dimensions can be written in terms of a matrix function vector product f(A)b at each time step, where A is an approximate matrix representation of the standard Laplacian. We use the finite volume method over unstructured triangular meshes to generate the matrix A, which is therefore non-symmetric. However, the standard Lanczos method for approximating f(A)b requires that A is symmetric. We propose a simple and novel transformation in which the standard Lanczos method is still applicable to find f(A)b, despite the loss of symmetry. Numerical results are presented to verify the accuracy and efficiency of our newly proposed numerical solution strategy
A method of lines approach for modelling saltwater intrusion in coastal aquifers
No full textThe equations governing saltwater intrusion in coastal aquifers are complex. Backward Euler time stepping approaches are often used to advance the solution to these equations in time, which typically requires that small time steps be taken in order to ensure that an accurate solution is obtained. We show that a method of lines approach incorporating variable order backward differentiation formulas can greatly improve the efficiency of the time stepping process.
References K. Bajracharya, J. Arunakumaren, and W. J. Huxley. Numerical modelling of seawater intrusion in Gooburrum, Bundaberg, Queensland. In T. R. Weaver and C. R. Lawrence, editors, Proceedings, Groundwater: Sustainable Solutions, pages 613ñ--618. University of Melbourne, 1998. J. Bear. Hydraulics of groundwater. McGraw-Hill, New York, 1979. K. E. Brenan, S. L. Campbell, and L. R. Petzold. Numerical solution of initial-value problems in differential-algebraic equations. SIAM, Philadelphia, 1996. Jing-Ru Cheng, Robert O. Strobl, Gour-Tsyh Yeh, Hsin-Chi Lin, and Woo Hee Choi. Modeling of 2D density-dependent flow and transport in the subsurface. J. Hydrologic Eng., 3(4):248--257, 1998. doi:10.1061/(ASCE)1084-0699(1998)3:4(248) A. C. Hindmarsh, P. N. Brown, K. E. Grant, S. L. Lee, R. Serban, D. E. Shumaker, and C. S. Woodward. SUNDIALS: Suite of nonlinear and differential/algebraic equation solvers. ACM Transactions on Mathematical Software, 31(3):363--396, 2005. https://computation.llnl.gov/casc/nsde/pubs/toms_sundials.pdf P. S. Huyakorn, P. F. Andersen, J. W. Mercer, and Jr. H. O. White. Saltwater intrusion in aquifers: Development and testing of a three-dimensional, finite-element model. Water Resources Research, 23(2):293--312, 1987. F. Liu, V. V. Anh, I. Turner, K. Bajracharya, W. J. Huxley, and N. Su. A finite volume simulation model for saturated-unsaturated flow and application to Gooburrum, Bundaberg, Queensland, Australia. Applied Mathematical Modelling, 30(4):352--366, 2006. doi:10.1016/j.apm.2005.05.007 M. D. Tocci, C. T. Kelley, and C. T. Miller. Accurate and economical solution of the pressure-head form of richards' equation by the method of lines. Advances In Water Resources, 20(1):1--14, 1997. doi:10.1016/S0309-1708(96)00008-5 Q. Zhang, R. E. Volker, and D. A. Lockington. Numerical investigation of seawater intrusion at Gooburrum, Bundaberg, Queensland, Australia. Hydrogeology Journal, 12:674--687, 2004. doi:10.1007/s10040-004-0333-
Moving From Risk to Hope: Count Us In
No full textIn “Moving From Risk to Hope: Count Us In,” the author describes the report entitled From a Nation at Risk to a Nation at Hope released in January 2019 by the Aspen Institute National Commission on Social, Emotional, and Academic Development. The report and related brief, Building Partnerships in Support of Where, When, and How Learning Happens offer recommendations for how the education sector can support social and emotional learning and development. This article offers a reflection on the Nation at Hope report recommendations for the youth development field and professionals. There are significant opportunities for the youth development field to partner with other sectors, intentionally support social and emotional learning, train professional staff on strategies to support learning and development, and research our efforts in ways that are accessible and foster practice. It is a critical and hopeful time for the youth development field to honor our history, employ the recommendations in the report, and build our youth development knowledge and practice in light of what we now know about how to optimally foster learning and development
- …
