Open Access. Powered by Scholars. Published by Universities.®
Social and Behavioral Sciences Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Publication
-
- Faculty of Engineering and Information Sciences - Papers: Part A (6)
- Faculty of Science - Papers (Archive) (2)
- Senior Deputy Vice-Chancellor and Deputy Vice-Chancellor (Education) - Papers (2)
- Faculty of Engineering and Information Sciences - Papers: Part B (1)
- Faculty of Science, Medicine and Health - Papers: part A (1)
Articles 1 - 13 of 13
Full-Text Articles in Social and Behavioral Sciences
On The Accuracy Of Dose Prediction Near Metal Fixation Devices For Spine Sbrt, Zhangkai J. Cheng, Regina M. Bromley, Bradley M. Oborn, Martin Carolan, Jeremy T Booth
On The Accuracy Of Dose Prediction Near Metal Fixation Devices For Spine Sbrt, Zhangkai J. Cheng, Regina M. Bromley, Bradley M. Oborn, Martin Carolan, Jeremy T Booth
Faculty of Engineering and Information Sciences - Papers: Part A
The metallic fixations used in surgical procedures to support the spine mechanically usually consist of high-density materials. Radiation therapy to palliate spinal cord compression can include prophylactic inclusion of potential tumor around the site of such fixation devices. Determination of the correct density and shape of the spine fixation device has a direct effect on the dose calculation of the radiation field. Even with the application of modern computed tomography (CT), under- or overestimation of dose, both immediately next to the device and in the surrounding tissues, can occur due to inaccuracies in the dose prediction algorithm. In this study, …
Features Of A Self-Mixing Laser Diode Operating Near Relaxation Oscillation, Bin Liu, Yanguang Yu, Jiangtao Xi, Yuanlong Fan, Qinghua Guo, Jun Tong, R A. Lewis
Features Of A Self-Mixing Laser Diode Operating Near Relaxation Oscillation, Bin Liu, Yanguang Yu, Jiangtao Xi, Yuanlong Fan, Qinghua Guo, Jun Tong, R A. Lewis
Faculty of Engineering and Information Sciences - Papers: Part A
When a fraction of the light reflected by an external cavity re-enters the laser cavity, both the amplitude and the frequency of the lasing field can be modulated. This phenomenon is called the self-mixing effect (SME). A self-mixing laser diode (SM-LD) is a sensor using the SME. Usually, such LDs operate below the stability boundary where no relaxation oscillation happens. The boundary is determined by the operation condition including the injection current, optical feedback strength and external cavity length. This paper discovers the features of an SM-LD where the LD operates beyond the stability boundary, that is, near the relaxation …
On The Classical Solvability Of Near Field Reflector Problems, Jiakun Liu, Neil Trudinger
On The Classical Solvability Of Near Field Reflector Problems, Jiakun Liu, Neil Trudinger
Faculty of Engineering and Information Sciences - Papers: Part A
In this paper we prove the existence of classical solutions to near field reflector problems, both for a point light source and for a parrallel light source, with planar recievers. These problems involve monge-Ampere type equations, subject to nonlinear oblique boundary conditions. Our approach builds on earlier work in the optimal transportation case by Trudinger and Wang and makes use of a recent extension of degree theory to oblique boundary conditioins by Li, Liu and Nguyen.
Comparative Evaluation Of Modern Dosimetry Techniques Near Low- And High-Density Heterogeneities, Eyad A. Alhakeem, Sami Alshaikh, Anatoly B. Rosenfeld, Sergei F. Zavgorodni
Comparative Evaluation Of Modern Dosimetry Techniques Near Low- And High-Density Heterogeneities, Eyad A. Alhakeem, Sami Alshaikh, Anatoly B. Rosenfeld, Sergei F. Zavgorodni
Faculty of Engineering and Information Sciences - Papers: Part A
The purpose of this study is to compare performance of several dosimetric methods in heterogeneous phantoms irradiated by 6 and 18 MV beams. Monte Carlo (MC) calculations were used, along with two versions of Acuros XB, anisotropic analytical algorithm (AAA), EBT2 film, and MOSkin dosimeters. Percent depth doses (PDD) were calculated and measured in three heterogeneous phantoms. The first two phantoms were a 30 x 30 x 30 cm3 solid-water slab that had an air-gap of 20x 2.5 x 2.35 cm3. The third phantom consisted of 30 x 30 x 5 cm3 solid water slabs, two 30 x 30 x …
Lower Bounds On The Kobayashi Metric Near A Point Of Infinite Type, Tran Vu Khanh
Lower Bounds On The Kobayashi Metric Near A Point Of Infinite Type, Tran Vu Khanh
Faculty of Engineering and Information Sciences - Papers: Part A
2015 Mathematica Josephina, Inc. Under a potential-theoretical hypothesis named f-property which holds for all pseudoconvex domains of finite type and many examples of infinite type, we give a new method for constructing a family of bumping functions and hence plurisubharmonic peak functions with good estimates. The rate of lower bounds on the Kobayashi metric follows by the estimates of peak functions. The application to the continuous extendibility of proper holomorphic maps is given.
Motion By Mixed Volume Preserving Curvature Functions Near Spheres, David James Hartley
Motion By Mixed Volume Preserving Curvature Functions Near Spheres, David James Hartley
Senior Deputy Vice-Chancellor and Deputy Vice-Chancellor (Education) - Papers
In this paper we investigate the flow of hypersurfaces by a class of symmetric functions of the principal curvatures with a mixed volume constraint. We consider compact hypersurfaces without boundary that can be written as a graph over a sphere. The linearisation of the resulting fully nonlinear PDE is used to prove a short-time existence theorem for hypersurfaces that are sufficiently close to a sphere and, using centre manifold analysis, the stability of the sphere as a stationary solution to the flow is determined. We will find that for initial hypersurfaces sufficiently close to a sphere, the flow will exist …
Can Event-Related Potentials Serve As Neural Markers For Wins, Losses, And Near-Wins In A Gambling Task? A Principal Components Analysis, Lisa Lole, Craig J. Gonsalvez, Robert J. Barry, Frances M. De Blasio
Can Event-Related Potentials Serve As Neural Markers For Wins, Losses, And Near-Wins In A Gambling Task? A Principal Components Analysis, Lisa Lole, Craig J. Gonsalvez, Robert J. Barry, Frances M. De Blasio
Faculty of Social Sciences - Papers (Archive)
Originally, the feedback related negativity (FRN) event-related potential (ERP) component was considered to be a robust neural correlate of non-reward/punishment processing, with greater negative deflections observed following unfavourable outcomes. More recently, it has been suggested that this component is better conceptualised as a positive deflection following rewarding outcomes. The current study sought to elucidate the nature of the FRN, as well as another component associated with incentive-value processing, the P3b, through application of a spatiotemporal principal components analysis (PCA). Seventeen healthy controls played a computer electronic gaming machine (EGM) task and received feedback on credits won or lost on each …
Motion By Volume Preserving Mean Curvature Flow Near Cylinders, David James Hartley
Motion By Volume Preserving Mean Curvature Flow Near Cylinders, David James Hartley
Senior Deputy Vice-Chancellor and Deputy Vice-Chancellor (Education) - Papers
We investigate the volume preserving mean curvature flow with Neumann boundary condition for hypersurfaces that are graphs over a cylinder. Through a center manifold analysis we find that initial hypersurfaces sufficiently close to a cylinder of large enough radius, have a flow that exists for all time and converges exponentially fast to a cylinder. In particular, we show that there exist global solutions to the flow that converge to a cylinder, which are initially non-axially symmetric. A similar case where the initial hypersurfaces are spherical graphs has previously been investigated by Escher and Simonett [8].
A Comparison Of Bushfire Fuel Hazard Assessors And Assessment Methods In Dry Sclerophyll Forest Near Sydney, Australia, Penny J. Watson, Sandra H. Penman, Ross A. Bradstock
A Comparison Of Bushfire Fuel Hazard Assessors And Assessment Methods In Dry Sclerophyll Forest Near Sydney, Australia, Penny J. Watson, Sandra H. Penman, Ross A. Bradstock
Faculty of Science - Papers (Archive)
Over the last decade, fire managers in Australia have embraced the concept of ‘fuel hazard’, and guides for its assessment have been produced. The reliability of these new metrics, however, remains to be determined. This study compared fuel hazard ratings generated by five assessment teams using two Australian hazard assessment methods, in two dry sclerophyll forest sites on Sydney’s urban fringe. Attributes that underpin hazard scores, such as cover and height of various fuel layers, were also assessed. We found significant differences between teams on most variables, including hazard scores. These differences were more apparent when fuel hazard assessments focussed …
Large Area Microfabrication Of Electroactive Polymeric Structures Based On Near-Field Electrospinning, R Lameiro, Vitor Sencadas, Senentxu Lanceros-Méndez, J H. Correia, P M. Mendes
Large Area Microfabrication Of Electroactive Polymeric Structures Based On Near-Field Electrospinning, R Lameiro, Vitor Sencadas, Senentxu Lanceros-Méndez, J H. Correia, P M. Mendes
Faculty of Engineering and Information Sciences - Papers: Part A
The use of electroactive polymeric materials for sensing and actuating applications is very attractive due to important properties like low operating voltage, low form factor, or high mechanical flexibility. However, its use has been conditioned by the lack of available processing methods for such materials. The deposition of thin layers is very easy by conventional techniques; however obtaining patterned layers is not a trivial task. This paper presents a methodology suitable to fabricate electroactive polymeric microstructures on large area devices. Structures ranging from ∼1, 5 mm to ∼100 μm width, with a thickness of ∼12 μm, were obtained.
Parametric Investigation Of Near End And Far End Crosstalks In Printed Circuit Board Lands, Md Masud Rana, Md Rabiul Islam, Md Kamal Hosain
Parametric Investigation Of Near End And Far End Crosstalks In Printed Circuit Board Lands, Md Masud Rana, Md Rabiul Islam, Md Kamal Hosain
Faculty of Engineering and Information Sciences - Papers: Part B
Multi-conductor transmission line and interconnect carry signals with wide rage of frequencies from sending end to receiving end. The signal in one transmission line may be interupted by the unwanted contributions from the neighboring line conductors. If data speed increases, high frequency effects occur and the signals suffer from difficulties such as ringing, crosstalk, reflections, and ground bounce that seriously hamper the quality of the received signal. In order to estimate the signal quality, signal integrity analysis is needed. In this paper, an attempt has been made to investigate the sensitivity of the near and far end crosstalk on the …
2635 Ma Amphibolite Facies Gold Mineralisation Near A Terrane Boundary (Suture?) On Storo, Nuuk Region, Southern West Greenland, Allen P. Nutman, Ole Christiansen, Clark R. L Friend
2635 Ma Amphibolite Facies Gold Mineralisation Near A Terrane Boundary (Suture?) On Storo, Nuuk Region, Southern West Greenland, Allen P. Nutman, Ole Christiansen, Clark R. L Friend
Faculty of Science - Papers (Archive)
Gold on Storø (in the Nuuk region of southern West Greenland) occurs in a slice of strongly deformed, amphibolite facies, Neoarchaean quartzo-feldspathic metasedimentary rocks and amphibolites in tectonic contact with the Eoarchaean Færingehavn terrane and the Meso- to Neoarchaean Akia terrane. The gold is associated with either löllingite (FeAs) + arsenopyrite or pyrrhotite, which belong with the amphibolite facies silicate mineral assemblages. Zircons were U/Pb dated by SHRIMP to constrain the timing of mineralisation. The 2700–2830 Ma oscillatory-zoned, high Th/U volcano-sedimentary zircon as whole grains and cores are interpreted to give the maximum depositional age of the rocks hosting the …
Modelling Fire Weather And Fire Spread Rates For Two Bushfires Near Sydney, M S. Speer, L M. Leslie, R Morison, W Catchpole, Ross Bradstock, R Bunker
Modelling Fire Weather And Fire Spread Rates For Two Bushfires Near Sydney, M S. Speer, L M. Leslie, R Morison, W Catchpole, Ross Bradstock, R Bunker
Faculty of Science, Medicine and Health - Papers: part A
The observed headfire rates of spread of two severe wildfires in heathlands near Sydney were compared with predictions made using a meteorological model to forecast wind speeds and a new simple empirical fire behaviour model that uses fuel height and wind speed at 2 m above ground to predict rate of spread. The predicted rates of spread, using both actual and predicted wind speeds, compared favourably with observed rates of spread averaged over 2 hours and 5.5 hours for the Bell Range and Royal National Park fires respectively.