to be done in this area. Face recognition is a problem that scarcely clamoured for attention before the computer age but, having surfaced, has involved a wide range of techniques and has attracted the attention of some fine minds (David Mumford was a Fields Medallist in 1974). This singular application of mathematical modelling to a messy applied problem of obvious utility and importance but with no unique solution is a pretty one to share with students: perhaps, returning to the source of our opening quotation, we may invert Duncan's earlier observation, 'There is an art to find the mind's construction in the face!'.

Linear and nonlinear waves, by G. B. Whitham. Pp.636. £50. 1999. ISBN 0 471 35942 4 (Wiley).

Climate change 2014 - Synthesis Report

http://personalpages.to.infn.it/~onorato/publications_files/2013_Onorato_etal_PhysRep.pdf

Rogue waves and their generating mechanisms in different physical contexts

Wind speeds over the world’s oceans have increased over the past two decades, as have wave heights. Studies of climate change typically consider measurements or predictions of temperature over extended periods of time. Climate, however, is much more than temperature. Over the oceans, changes in wind speed and the surface gravity waves generated by such winds play an important role. We used a 23-year database of calibrated and validated satellite altimeter measurements to investigate global changes in oceanic wind speed and wave height over this period. We find a general global trend of increasing values of wind speed and, to a lesser degree, wave height, over this period. The rate of increase is greater for extreme events as compared to the mean condition.

https://researchbank.swinburne.edu.au/file/bca43746-6f16-4ad2-a4b7-27f8d8d60fed/1/PDF (Published version).pdf

Global trends in wind speed and wave height over the past 25 years

In this paper a detailed global climatology of wind sea and swell parameters, based on the ERA-40 wave reanalysis, is presented. The spatial pattern of the swell dominance of the Earth’s Oceans, in ...

A Global View on the Wind Sea and Swell Climate and Variability from ERA-40

In an ongoing Joint Industry Project, DNV Classification Note 30.5: Environmental Conditions and Environmental Loads is being updated in accordance with the present state-of-the-art and corresponding industry needs and at the same time converted into a DNV Recommended Practice DNV-RP-C205. The updates include topics on non-linear wave diffraction around large volume structures, higherorder wave loading, slamming, run-up and wave in deck loads. The new RP also includes an improved description and statistical modeling of wind and ocean waves. Other new topics are shallow water waves and their load effects. New and updated guidance is provided on vortex induced vibrations in current and waves, and vortex induced motions of floaters. The new RP also has a chapter on model testing.

New DNV Recommended Practice DNV-RP-C205 On Environmental Conditions And Environmental Loads

Towards the identification of warning criteria: Analysis of a ship accident database

Nonlinear modulational instability of wavepackets is one of the mechanisms responsible for the formation of large-amplitude water waves. Here, mechanically generated waves in a three-dimensional basin and numerical simulations of nonlinear waves have been compared in order to assess the ability of numerical models to describe the evolution of weakly nonlinear waves and predict the probability of occurrence of extreme waves within a variety of random directional wave fields. Numerical simulations have been performed following two different approaches: numerical integration of a modified nonlinear Schrodinger equation and numerical integration of the potential Euler equations based on a higher-order spectral method. Whereas the first makes a narrow-banded approximation (both in frequency and direction), the latter is free from bandwidth constraints. Both models assume weakly nonlinear waves. On the whole, it has been found that the statistical properties of numerically simulated wave fields are in good quantitative agreement with laboratory observations. Moreover, this study shows that the modified nonlinear Schrodinger equation can also provide consistent results outside its narrow-banded domain of validity.

https://researchbank.swinburne.edu.au/file/7b2611ba-9886-49fb-8279-afc8dda44401/1/PDF (Published version).pdf

Elzbieta M. Bitner-Gregersen

Papers

New DNV Recommended Practice DNV-RP-C205 On Environmental Conditions And Environmental Loads

Towards the identification of warning criteria: Analysis of a ship accident database

Evolution of weakly nonlinear random directional waves: laboratory experiments and numerical simulations

Joint distributions for significant wave height and wave zero-up-crossing period

Joint met-ocean description for design and operations of marine structures