Gophers: socially oriented pervasive gaming

Gophers is an open-ended gaming environment which relies on location data, user generated content and player interactions to shape gameplay. It seeks to investigate social collaboration within localised and distributed gaming communities, the potential of pervasive gaming as a technique to collect useful data about the physical world and additionally, use of novel peer-judging methods to allow self-governing of the game world. In this paper, we introduce the game in its current state and provide an overview of early test results

Student Recital: Senior and Junior Composition Recital

Kemp Recital HallApril 17, 2016Sunday Evening9:00 p.m

Review article: Emergency department assessment and management of stab wounds to the neck

Abstract A stab wound to neck is an infrequent but highly important presentation to the ED in Australasia. Injuries to the two large neurovascular bundles that are vital to life might occur with associated injuries to midline aerodigestive structures. A literature review was undertaken to discuss the assessment and management of this injury in the emergency medicine setting

Interlaminar Tensile Properties of Unidirectional and Woven Carbon Fiber Reinforced Toughened Epoxy Laminates

This project aims to develop a dataset on interlaminar tensile strength comparing unidirectional and woven thermoset matrix carbon fiber composites keeping ply count, matrix material, and fiber diameter constant. The interlaminar tensile strength is an important property relating to the delamination failure mode. Interlaminar tensile strength is determined using the ASTM D6415 testing standard. This test is a modified four-point bend test using a 90° curved beam test specimen. Laminates were produced by laying up pre-impregnated carbon fiber sheets onto a curved beam tooling. The unidirectional laminate was produced with 20 plies in a [0,0,90,0,0]4 layup pattern. The woven fiber laminate was produced with 20 plies of a 2x2 twill weave fabric in the 0° orientation. Both laminates were cured in an autoclave. The laminate panels were machined into the test specimens with a width of 1 inch. The ASTM D6415 tests were performed with a crosshead displacement rate of 2.0 mm/min until there was a drop in load indicating initial delamination. The unidirectional specimens had an average interlaminar tensile strength of 8.72 Ksi. The woven fabric specimens had an average interlaminar tensile strength of 9.52 Ksi. After testing, the specimens were sectioned and imaged using optical microscopy and scanning electron microscopy (SEM). The specimens for SEM were gold sputter coated and imaged under high vacuum mode. Imaging indicated that for unidirectional specimens, delamination started in the matrix then propagated along the ply boundary. Woven specimens appeared to fail in regions of excess matrix material at intersections of fiber orientations. It is recommended for continuing work to use a test fixture that does not need to be offset. It would also be beneficial to have adjustable span lengths for the top and bottom jaws to increase specimen compatibility. Lastly, increasing matrix toughness would increase failure loads where stress concentrations are common in components

Peering beyond IRAS: The 100 to 350 micron dust emission from galaxies

Several arguments can be made to study the continuum emission from dust in galaxies at wavelengths between the cutoff of the Infrared Astronomy Satellite (IRAS) survey (about 100 microns) and the shortest wavelength that is commonly accessible from the ground (about 350 microns). Some theoretical work (see the summary by Cox and Mezger 1989) indicates that there are very cool (T sub d less than or equal to 25 K) components to the dust emission that emit primarily at wavelengths between 100 and 250 microns. In fact, a significant fraction of the total luminosity, representing a large fraction of the dust mass in some types of galaxies, is emitted at long far-infrared wavelengths. In such cases, the cool dust must play a major role in regulation of the energy balance of the Interstellar Medium (ISM) and in shielding the cores of neutral clouds

Modeling, simulation, and analysis of two hydraulic power take-off systems for wave energy conversion

Hydraulic power take-off (PTO) systems have been implemented in several wave energy converter (WEC) designs in recent years. Two popular hydraulic PTO configurations coupled to a point absorber hydrodynamic model are simulated in waves representative of an energetic sea state likely to be found in deep waters off the coast of Oregon. The first hydraulic PTO configuration is a passive system tuned to the dominant forcing period of the sea state. The second system is an actively controlled hydraulic PTO topology tracking an optimal power absorption trajectory. A linear quadratic tracking controller is developed to follow the reference trajectory and performs well despite the nonlinear elements of the system dynamics. Simulation results of the system dynamics are presented for both models. A loading analysis is conducted and loading distributions of the two systems in irregular waves are compared. The distributions show the active system to have a larger variability in loading, while the distributions of the passive system indicate more frequent mean loading components. Parameters of the passive system components are varied in order to understand the effect on power output and loading.Keywords: Wave Energy Converter, Hydraulic PTO, Optimal Control, Loading Analysis, Simulation, Wave Energy Conversion, Fatigue Loading, WE