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Articles 1 - 7 of 7
Full-Text Articles in Engineering
Magneto-Optical Probe Of Two-Dimensional Electron Liquid And Solid Phases, E. M. Goldys, S. A. Brown, R. B. Dunford, A. G. Davies, R. Newbury, R. G. Clark, Philip E. Simmonds, J. J. Harris, C. T. Foxon
Magneto-Optical Probe Of Two-Dimensional Electron Liquid And Solid Phases, E. M. Goldys, S. A. Brown, R. B. Dunford, A. G. Davies, R. Newbury, R. G. Clark, Philip E. Simmonds, J. J. Harris, C. T. Foxon
Faculty of Engineering - Papers (Archive)
Band-gap photoluminescence (PL) is used to establish the optical signature of a GaAs-Ga1-xAlxAs heterojunction in the extreme quantum limit. The temperature and field dependence of new PL structure maps a phase boundary which correlates with the electron liquid-solid transition.
Hole-Quasiparticle Resonant Polaron Coupling In Quantum Wells Containing High Densities Of Free Carriers , Philip E. Simmonds, M. S. Skolnick, T. A. Fisher, K. J. Nash, R. S. Smith
Hole-Quasiparticle Resonant Polaron Coupling In Quantum Wells Containing High Densities Of Free Carriers , Philip E. Simmonds, M. S. Skolnick, T. A. Fisher, K. J. Nash, R. S. Smith
Faculty of Engineering - Papers (Archive)
Strong resonant-polaron-coupling phenomena in the magnetophotoluminescence (magneto-PL) spectra of modulation-doped quantum wells are reported. The polaron interactions arise between hole quasiparticles in otherwise filled electron Landau levels, and LO phonons of the quantum-well material. This type of many-body polaron-coupling phenomenon is expected to be a universal feature of the magneto-PL spectra of quantum wells with electron Fermi energy greater than the LO-phonon energy of the well material.
Effect Of A Robot's Geometrical Parameters On Its Optimal Dynamic Performance, M. Yousef Ibrahim, Christopher D. Cook, A K. Tieu
Effect Of A Robot's Geometrical Parameters On Its Optimal Dynamic Performance, M. Yousef Ibrahim, Christopher D. Cook, A K. Tieu
Faculty of Engineering - Papers (Archive)
This paper presents a study that was conducted at Monash University College - Gippsland on the effect of a robot’s geometrical parameters on its dynamic performance. This research was undertaken in pursuit of an optimal dynamic performance of industrial robots. In this study an indicator was established to quantitatively measure the dynamic performance of a robot arm with respect to changes in the geometrical parameters. Since the dynamic behaviour of a robot’s arm is largely dependent on its inertia terms; the performance indicator was based on the Logarithmic function of the sensitivity of the inertia matrix’s eigenvalues to changes in …
The Quantum Theory For Anomalous Low-Temperature Thermal Conductivity Of Noncrystalline Dielectric Solids, W L. Zhao, B L. Zhou
The Quantum Theory For Anomalous Low-Temperature Thermal Conductivity Of Noncrystalline Dielectric Solids, W L. Zhao, B L. Zhou
Faculty of Engineering - Papers (Archive)
We discuss the interaction between two-level systems and the phonon field in noncrystalline dielectric solids, and we calculate the quantum transition matrix elements ofsuch an interaction. After studying the Boltzmann equation for phonon transport. we obtain the phonon distribution function. From a direct calculation of the heat current, and as a result of obtaining the thermal conductivity of non-crystalline dielectric solids, the P relation is obtained.
Study Of Actuator Technologies For A Miniature Distributed, Fazel Naghdy, P Wong, P Carter, N Laszlo, Christopher D. Cook
Study Of Actuator Technologies For A Miniature Distributed, Fazel Naghdy, P Wong, P Carter, N Laszlo, Christopher D. Cook
Faculty of Engineering - Papers (Archive)
Disnibuted Manipulation Environment (DME), is a concept based on the overall modularity of a manufacturing system including actuation, sensing, control, computing hardware and software. The basic building block of DME is the Manipulation Module (MM). Each MM may consist of up to three units including processing the unit, actuating unit and sensory unit. The emphasis of this paper is on the actuating unit of the Manipulation Modules used in DME. The generic features of the actuators suitable for this application are discussed and a review of the motion producing characteristics of the following actuator technologies is presented: electrostatic, electromagnetic, fluid …
3-D Object Modelling And Recognition Using Absorption In A Colour Liquid, Hao Shi, Fazel Naghdy, Christopher D. Cook
3-D Object Modelling And Recognition Using Absorption In A Colour Liquid, Hao Shi, Fazel Naghdy, Christopher D. Cook
Faculty of Engineering - Papers (Archive)
The application of computer vision in industry has been increasing as greater use is made of flexible automation and robotics. Quality control and sorting can also be heavily dependent on artificial vision interfaced to an intelligent decision making system. Traditionally industrial tasks requiring computer vision are simplified to a 2-D problem in a plane. This permits the use of a single camera and hence reduces the complexity of the procedures of frame grabbing, image processing and decision making. Such a solution is however not suitable when 3-D information is vital in the control or decision making processes. Generation and processing …
Performance Of Test Embankment Constructed To Failure On Soft Marine Clay, Buddhima Indraratna, A S. Balasubramaniam, S Balachandran
Performance Of Test Embankment Constructed To Failure On Soft Marine Clay, Buddhima Indraratna, A S. Balasubramaniam, S Balachandran
Faculty of Engineering - Papers (Archive)
This paper describes the observed and the predicted performance of a full-scale trial embankment built to failure on a soft Malaysian marine clay. Predictions of the subsoil deformation. the critical height of fill and the corresponding slip surface are made and subsequently compared to the field measurements. It is of importance to realize that all the predictions were made prior to the actual failure of the embankment. The comparison with measurements was possible only after the International Symposium on Trial Embankments on Malaysian Marine Clays, was held in Kuala Lumpur, Malaysia, in November 1989, during which the field data were …