Commentary on Section 264 of ITAA 1936: commissioner may require information and evidence
Dabner, Justin
2007-01-01
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This thesis reports on the development of a Two-Tier methodology that provides
support for assembly sequence construction, validation and evaluation in parallel with
the design. This facilitates the production of products that are optimised for
assemblability. The proposed approach diverges significantly from many of the
sequence generation methods developed to date, which assume that assembly
planning starts at the conclusion of the design process. It is believed that the latter
approach misses an important opportunity to concurrently implement design and
sequence improvements that would result in products inherently suited to assembly.
The industrial assembly planning process was found to be completely different from
the automatic sequence generation approach. The Two-Tier methodology has its
foundations in this manual process, which...
School of Management
The single-layer thickness of Pb(Zr0.3Ti0.7)O3(PZT 30/70) thin films made by the sol-gel process is often restricted by the appearance of cracks when a single layer is thicker than 100 nm. Making a film with 1μm thick needs more than 10 times coating cycles, which is sometimes unacceptable. In this study, a sol modified with an additive was used for the preparation of thick PZT films. The thickness of the films depends upon the rotation rate. Up to 700 nm crack-free single layers could be obtained. The deposited films crystallised as the perovskite structure on platinum-buffered silicon by heating at 550°C. The porosity of the thick films was a function of the single layer thickness. A dense PZT film with a single layer 140 nm thick was found to have a very high pyroelectric coefficient (p=2.36×10− 4CK− 1m− 2) and figure of merit (1.88...
A project supported by a grant from Pergamon Press Ltd. and I.C.L. Ltd.
A conceptual design methodology was produced and subsequently coded into a
Visual C++ (GUI) environment to facilitate the rapid comparison of several possible
configurations to satisfy High Altitude Long Endurance (FIALE) unmanned aircraft (UAV)
missions in the Low Speed (propeller driven aircraft) regime.
Several comparative studies were performed to verify the applicability of traditional
design methods. The traditional computational design methodologies fail in several areas
such as high aspect ratio wing weight estimation and design, low Reynolds number wing
design, high altitude engine performance, low Reynolds number drag estimation, unmanned
aircraft design, and the conceptual design of unconventional configurations. The
methodology developed for this thesis was robust enough to allow not only for
consideration of these areas of...
This paper presents a decision support tool that can be used by practitioners and industrialists to solve practical cell formation problems. The tool is based on a cell formation algorithm that employs a set of heuristic rules to obtain a quasi-optimal solution from both component routing information and other significant production data. The algorithm has been tested on a number of data sets obtained from the literature. The test results have demonstrated that in many cases the algorithm has produced an exceptional performance in terms of the grouping efficiency, grouping efficacy and quality index measures. The algorithm, to an extent, overcomes common problems in existing cell formation methods such as in dealing with ill-structured matrices and achieving rational cell sizes.
Discrete event simulation has been applied to a wide range of applications areas
due to its ability to represent stochastic systems over time. Maintenance,
particularly field maintenance, is complex due to the interaction of different
sub-systems of use, maintenance, repair and inventory and the conflicting
demands of minimizing cost and maximizing availability. The area of simulation
of maintenance systems receives little treatment in the literature and tends to
focus on reliability modeling of individual assets. The work presented here
documents research to fill this gap by specifying, creating and testing
simulation functionality to rapidly model field maintenance systems.
The corrosion fatigue crack propagation behaviour of a high
strength low alloy steel, N-A-XTRA 70, in a synthetic sea
water solution was tested using S. E. N. specimens subjected
to a loading frequency of 0.1 Hz and a load ratio of 0.6.
In order to simulate the conditions encountered by a thumbnail
type crack several specimens from each of the
microstructural types tested, namely parent plate, heat
affected zone and heat treated material, had their crack
sides covered by transparent plastic covers. Severe overprotection
and slight underprotection conditions were
produced using cathodic protection potentials of -1400,
-1300, -1200 and -700 mV (S. C. E. ).
The Paris relationship da/dN = CLKm was found to be a useful
tool in describing the crack propagation rate data. Results
obtained, presented in the form of plots of log da/dN against
l...
Engineering and Physical Sciences Research Council
