http://hdl.handle.net/2440/1088 Sat, 25 May 2013 15:48:10 GMT 2013-05-25T15:48:10Z http://hdl.handle.net/2440/77886 Title: A fast stockpile simulation engine and its application in mineral ore handling Author: Lu, Tien-Fu; Xu, Shihong Abstract: This paper presents structures and principles of a fast stockpile simulation engine that enhances automatic material process by providing accurate digital information of material quality distribution within stockpiles. Compared with traditional measurement-based approaches, our simulation technology reduces operation cost by eliminating frequent physical measuring; improves operation accuracy through all-time whole-area contour simulation (instead of measuring a few positions of material layers now and then); and speeds the process through fast simulation and instant response to quality information query. Based on simplified grain dynamics and cellular automata models, the technology can achieve real-time/super-real-time simulation, which is critical to be adopted by the industry. Application of the technology in analyzing mineral ores handling is also discussed. Sat, 31 Dec 2011 13:30:00 GMT http://hdl.handle.net/2440/77886 2011-12-31T13:30:00Z http://hdl.handle.net/2440/77885 Title: Acoustic characterisation of a rectangular rocket combustor with liquid oxygen and hydrogen propellants Author: Hardi, Justin Steven; Oschwald, M.; Dally, Bassam B. Abstract: High frequency combustion instabilities have plagued the development of liquid propellant rocket engines since their invention. Continuing research efforts aim to understand the mechanisms by which the oscillating combustion chamber pressure of self-sustaining combustion instabilities is driven. To this end, a rectangular combustor with acoustic forcing, designated ‘BKH’, was developed to study flame-acoustic interaction under conditions which are representative of real rocket engines. This article describes the acoustic characterisation of the BKH combustor using high frequency dynamic pressure measurements from the first hot-fire tests using liquid oxygen and ambient temperature or cryogenic hydrogen injectants. Analysis of the resulting high frequency pressure measurements shows excellent agreement with the predicted acoustic properties of the system which were calculated using finite element methods. Sat, 31 Dec 2011 13:30:00 GMT http://hdl.handle.net/2440/77885 2011-12-31T13:30:00Z http://hdl.handle.net/2440/77884 Title: Residual opening of hydraulically stimulated fractures filled with granular particles Author: Bortolan Neto, Luiz; Kotousov, Andrei Georgievich Sat, 31 Dec 2011 13:30:00 GMT http://hdl.handle.net/2440/77884 2011-12-31T13:30:00Z http://hdl.handle.net/2440/77883 Title: Knee extensor strength differences in obese and healthy-weight 10-to 13-year-olds Author: Tsiros, Margarita D.; Coates, Alison; Howe, Peter Ranald Charles; Grimshaw, Paul Norman; Walkley, Jeff; Shield, Anthony J.; Mallows, R.; Hills, Andrew P.; Kagawa, Masaharu; Shultz, S.; Buckley, Jonathan David Mon, 31 Dec 2012 13:30:00 GMT http://hdl.handle.net/2440/77883 2012-12-31T13:30:00Z