The drum agglomeration of nickel laterite and gold ores has been optimized through the design of experiments (DOE) using a Taguchi L16 (45) orthogonal array to determine the optimum conditions for maximizing average agglomerate size and minimizing the amount of fines. The effects of controllable operating factors including moisture content (nickel laterite ore: 34-37%; gold ore: 7-10%), retenti...

A unified critical state model has been developed for both clean sand and silty using the modified Cam-clay (MCC). The main feature of proposed is a new line equation in e-ln(p) plane that capable handling straight curved test results. With this feature, error calculating plastic volumetric strain is, theory, eliminated. Another crucial transformed stress tensor based on SMP (spatially mobilize...

the development of yielded or failure zone due to an engineering construction is a subject of study in different disciplines. in petroleum engineering, depletion from and injection of gas into a porous rock can cause development of a yield zone around the reservoir. studying this phenomenon requires elasto-plastic analysis of geomaterial, in this case the porous rocks. in this study, which is a...

A series of cyclic direct simple shear tests are performed to investigate the liquefaction resistance sandy soils from Christchurch, New Zealand. The study focuses on combined effects soil density and fines content soils. Two sands, a non-plastic silt, their mixtures prepared at different contents tested two sets relative densities. Test specimens reconstituted using procedure for water sedimen...

Title of dissertation: EXAMINING GENERAL DETERRENCE USING DATA FROM THE NATIONAL FOOTBALL LEAGUE Sarah J. Greenman, Doctor of Philosophy, 2014 Dissertation directed by: Professor Raymond Paternoster Department of Criminology and Criminal Justice To date, research studies have found only mild support for classic deterrence theory with the greatest support for increased certainty, little support ...

utilization of long fiber chemical pulp to enhance the strength properties of mechanical and chemi-mechanical pulp is served as a common approach by the papermakers. therefore softwood long fibers were exposed to chemical modification by cationic agent, eptmac, with the aim of reducing its consumption. then, the cationised fibers were mixed with cmp pulp with given ratios and the handsheets wer...