On the dynamics of vortex modes within magnetic islands

Recent work investigating the interaction of magnetic islands with micro-turbulence has uncovered the striking observation of large scale vortex modes forming within the island structure [W.A. Hornsby {\it et al.}, Phys. Plasmas {\bf 17} 092301 (2010)]. These electrostatic vortices are found to be the size of the island and are oscillatory. It is this oscillatory behaviour and the presence of turbulence that leads us to believe that the dynamics are related to the Geodesic Acoustic Mode (GAM), and it is this link that is investigated in this paper. Here we derive an equation for the GAM in the MHD limit, in the presence of a magnetic island modified three-dimensional axisymmetric geometry. The eigenvalues and eigenfunctions are calculated numerically and then utilised to analyse the dynamics of oscillatory large-scale electrostatic potential structures seen in both linear and non-linear gyro-kinetic simulations

Estimation of dynamic load demand on a ground support scheme due to a large structurally controlled violent failure – a case study

© 2015 Institute of Materials, Minerals and Mining and The AusIMM Published by Maney on behalf of the Institute and The AusIMM. In the future a larger proportion of underground mines will operate in deep, high stress environments where excavations may be exposed to very high loading demands. This case study has examined a violent structurally controlled failure occurring in a deep hardrock underground mine at a depth of 1055 metres below surface. On the basis of the damage observations the back analysis of this event concludes that the surface support system was ejected from the wall of the excavation with an initial velocity of 10.7 m s-1. Estimates of the mechanical demand imparted to the ground support scheme during failure were also calculated. These estimates carry several assumptions in order to simplify complex uncertainties concerning the loading mass of rock and transfer of kinetic energy between the rock and ground support. However, the demand may be conservatively assumed to be at least 150 kJ m-2. These results may reflect future mining conditions at great depth

Quantifying avian inertial properties using calibrated computed tomography

Estimating centre of mass and mass moments of inertia is an important aspect of many studies in biomechanics. Characterising these parameters accurately in three dimensions is challenging with traditional methods requiring dissection or suspension of cadavers. Here, we present a method to quantify the three-dimensional centre of mass and inertia tensor of birds of prey using calibrated computed tomography (CT) scans. The technique was validated using several independent methods, providing body segment mass estimates within approximately 1% of physical dissection measurements and moment of inertia measurements with a 0.993 R(2) correlation with conventional trifilar pendulum measurements. Calibrated CT offers a relatively straightforward, non-destructive approach that yields highly detailed mass distribution data that can be used for three-dimensional dynamics modelling in biomechanics. Although demonstrated here with birds, this approach should work equally well with any animal or appendage capable of being CT scanned

Development of a 16S Reference Library for eDNA Metabarcoding the Freshwater Fishes of Western Ecuador.

This project examines the use of the 16S locus to amplify neotropical freshwater fishes native to Western Ecuador in a newly created 16S reference library for DNA barcoding and eDNA metabarcoding applications. Among the orders Characiformes, Siluriformes, Cichliformes, Gobiiformes, Cryprinodontiformes, Gymnotiformes, and Perciformes, a compendium of 105 specimens were sequenced, with 43 representing new 16S sequences previously unavailable on Genbank

Guppy, Harry E. High School of Commerce Yearbook 1965-1966

Yearbook called the Comstar.https://scholar.uwindsor.ca/essexcountyontariohighschoolyearbooks/1174/thumbnail.jp

Guppy, Harry E. High School of Commerce Yearbook 1961-1962

Yearbook called the Comstar.https://scholar.uwindsor.ca/essexcountyontariohighschoolyearbooks/1190/thumbnail.jp

Guppy, Harry E. High School of Commerce Yearbook 1963-1964

Yearbook called the Comstar.https://scholar.uwindsor.ca/essexcountyontariohighschoolyearbooks/1172/thumbnail.jp

Guppy, Harry E. High School of Commerce Yearbook 1967-1968

Yearbook called the Comstar.https://scholar.uwindsor.ca/essexcountyontariohighschoolyearbooks/1175/thumbnail.jp

Guppy, Harry E. High School of Commerce Yearbook 1968-1969

Yearbook called the Comstar.https://scholar.uwindsor.ca/essexcountyontariohighschoolyearbooks/1176/thumbnail.jp