Ball, JE & Henderson, FM 1986, 'Tidal influence upon flow in rivers.'.
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Increasing development along coastal regions has resulted in engineers and water resource managers having to become conversant with the interaction between flow, flood or otherwise, in rivers and the tidal cycle in the ocean. The tidal cycle and its interaction with river flows is an example of unsteady flow. Consequently, determination of the interaction between the tidal cycle and the river flows requires solution of the unsteady flow equations. This paper presents results from a solution of the non dimensional unsteady flow equations for alternative tidal and river conditions. Also presented is a summary of the algorithm used for the numerical solution of the non dimensional unsteady flow equations.
Ball, JE & Henderson, FM 1986, 'Tidal influence upon flow in rivers.'.
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Increasing development along coastal regions has resulted in engineers and water resource managers having to become conversant with the interaction between flow, flood or otherwise, in rivers and the tidal cycle in the ocean. The tidal cycle and its interaction with river flows is an example of unsteady flow. Consequently, determination of the interaction between the tidal cycle and the river flows requires solution of the unsteady flow equations. This paper presents results from a solution of the non dimensional unsteady flow equations for alternative tidal and river conditions. Also presented is a summary of the algorithm used for the numerical solution of the non dimensional unsteady flow equations.
Bone, DJ, Bachor, H-A & Sandeman, RJ 1986, 'Fringe-pattern analysis using a 2-D Fourier transform', Applied Optics, vol. 25, no. 10, pp. 1653-1653.
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Bone, DJ, Bachor, H-A & Sandeman, RJ 1986, 'Spectral line interferometry with temporal and spatial resolution', Optics Communications, vol. 57, no. 1, pp. 39-44.
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BRAUN, RM & DOWNING, BJ 1986, '35 GHZ PHASE-LOCKED GUNN SOURCE BASED ON CURRENT HUMP PHASE DETECTION', ELECTRONICS LETTERS, vol. 22, no. 11, pp. 575-577.
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The letter describes the implementation of a phase-locking scheme described earlier to a 35 GHz Gunn solid-state source (SSS). The CLTF is developed, a loop filter is chosen and the response to a step disturbance is measured. This response is compared to the theoretical response obtained by a Runge-Kutta simulation.
CHIARELLA, C & SHANNON, AG 1986, 'AN EXAMPLE OF DIABETES COMPARTMENT MODELING', MATHEMATICAL MODELLING, vol. 7, no. 9-12, pp. 1239-1244.
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A general biomedical two-compartment model is described and analyzed. An application in diabetes research is then illustrated by reference to a study which is comparing subcutaneous and intravenous insulin kinetcs.
LOGANATHAN, P & ATPUTHARAJAH, PP 1986, 'EFFECTS OF FERTILIZERS ON YIELD AND LEAF NUTRIENT CONCENTRATIONS IN COCONUT', TROPICAL AGRICULTURE, vol. 63, no. 2, pp. 143-148.
Miki, N, Saga, S, Miyanaga, Y & Nagai, N 1986, 'ARMA spectral estimation using weighted model identification systems.', Journal of the Acoustical Society of Japan (E), vol. 7, no. 1, pp. 21-28.
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Recently, a model identification system (MIS) has been studied for ARMA parameter estimation. Since in MIS an estimator with a high-order ARMA parameter and a model reduction algorithm are used, the tracking ability of the spectral estimation is good. However in real speech analysis, estimation errors are caused by the use of a low-pass filter for A/D conversion. In order to compensate for this estimation error we propose a weighted MIS (WMIS) which includes a compensation for the characteristics of the low-pass filter. The WMIS estimates the input of the reference model and time-varying ARMA parameters, and achieves the property of rapid convergence by using a high order model. Furthermore the algorithm for minimum realization is shown as a model reduction algorithm. The proposed algorithms are applied to synthetic speech and real speech, and it is shown that the estimated spectra sufficiently represent the variation of formants without jitters in the high-frequency part. © 1986, Acoustical Society of Japan. All rights reserved.
Miyanaga, Y, Miki, N & Nagai, N 1986, 'Adaptive identification of a time-varying ARMA speech model', IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 34, no. 3, pp. 423-433.
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Schiebel, EN, Busby, HR & Waldron, KJ 1986, 'Design of a mechanical proximity sensor', Robotica, vol. 4, no. 4, pp. 221-228.
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SUMMARYA proximity sensor using a mechanical contact principle is under development for robotic applications. Good discrimination between contact loads and inertial windage loads is essential. Rugged design and easy replacement of sensing elements is also necessary. The sensor is under consideration for use on the feet of the Adaptive Suspension Vehicle.
Vigneswaran, S & Jing Song, C 1986, 'Mathematical modelling of the entire cycle of deep bed filtration', Water, Air, and Soil Pollution, vol. 29, no. 2, pp. 155-164.
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This study proposes a mathematical model which was developed from the 'O'Melia-Ali' and 'Adin-Rebhun' models, to describe the entire filtration cycle. The three coefficients appearing in this model were calculated for different operating conditions using 30 cm depth filter experiments. The concentrations and headloss profiles simulated for different filter depths using these coefficients were found to fit very well with experimental results. © 1986 D. Reidel Publishing Company.
Vigneswaran, S & Setiadi, T 1986, 'Flocculation study on spiral flocculator', Water, Air, and Soil Pollution, vol. 29, no. 2, pp. 165-188.
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Traditionally, the Jar Test has been used to assess the suitability of flocculation treatment for a given raw water. Unfortunately, the Jar Test suffers from a number of disadvantages. The new method of assessment of flocculation, Spiral Flocculator, has been claimed to be a better method than the Jar Test apparatus and a good method for continuous assessment of flocculation. This study compares the performance of Spiral Flocculator and Jar Test, and mathematical modeling of the Spiral Flocculator performance. The experiments conducted reveal that the Spiral Flocculator has a better effective energy dissipation compared to that of Jar Test. However, the size of flocs in Spiral Flocculator seems to be overestimated relative to the real flocculator and Jar Test. © 1986 D. Reidel Publishing Company.
Vigneswaran, S, Balasuriya, BLN & Viraraghavan, T 1986, 'Anaerobic wastewater treatment - Attached growth and sludge blanket process', ENVIRON. SANIT. REV., vol. No. 19-20, pp. 1-101.
Watterson, PA 1986, 'Infinite contraction in force-free magnetic field evolution in cylindrical geometry', Journal of Plasma Physics, vol. 35, no. 2, pp. 273-293.
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This paper provides a new formulation of the resistive force-free evolution of cylindrically symmetric magnetic fields subject to purely radial motions. It is shown analytically that the evolution bounded by a perfect conductor ceases to exist after a finite time if the initial field has total axial flux of opposite sign to the field on the axis of symmetry. A numerical solution indicates that the evolution ceases to exist owing to the unlimited contraction of the field profile producing a line of infinite current density. The asymptotic form of this ‘blow-up’ is identified as the particular self-similar contraction for which the field direction is exactly reversed in the limit of large radius. Possible applications to solar flares and the reversed-field pinch are discussed.
Bone, DJ, Bachor, H-A & Sandeman, RJ 1970, 'Automated Analysis of Interferograms', Fourth Conference of the Australian Optical Society.
Miki, N, Saga, S, Motoki, K, Miyanaga, Y & Nagi, N 1970, 'AREA ESTIMATION FROM ARMA ANALYSIS.', ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings, pp. 1613-1616.
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A vocal-tract model with boundary conditions is proposed, and it is shown that the model can be applied to a vocal-tract simulator and an estimation algorithm for vocal-tract shapes. Since the vocal-tract simulator can dynamically synthesize continuous speech taking into account the vocal-fold vibration and the loss factor in the vocal tract, it can be used as a tool for accurate evaluation of the estimation accuracy of the formants or the characteristics of the vocal tract. A new method for estimating the croos-sectional area of the vocal tract from the ARMA (autoregressive moving average) parameters is proposed. This method is based on the vocal-tract model and ARMA estimation algorithms.
Roper, H, Baweja, D & Kirkby, GA 1970, 'PRODUCTION AND CHARACTERIZATION OF FLY ASH FROM NEW SOUTH WALES COALS.', Materials Research Society Symposia Proceedings, pp. 115-124.
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Factors affecting fly ash characteristics are examined by consideration of the various processes and constituents involved in its production. Coal conversion, boiler-furnace operations and collection procedures are discussed. Current classification schemes applied to fly ash, in particular to those for use as a pozzolanic mineral admixture in concrete are reviewed. The variability of the material is highlighted using physical and chemical data. Shape and size characteristics of selected fly ashes from sources within New South Wales, Australia are illustrated by electron micrographs.
Roper, H, Kirkby, G & Baweja, D 1970, 'Long-term durability of blended cement concretes in structures', American Concrete Institute, ACI Special Publication, pp. 463-482.
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Although abundant data are available on early-age properties of blended cement concretes, relatively little Information has been published on the long-term durability of blended cement concretes In service. The paper Is a summary of an Investigation of over two hundred structures In Australia. Some of these have service lives In excess of twenty years. Cored materials from some of the structures are described, and petrological and mineralogical examination allow conclusions on the efficacy hydration processes under field curing to be made. Porosity and permeability is discussed. Carbonation and corrosion effects on long-term durability are considered by the examination of data obtained from in situ concretes. The interactions between cement content and water: cement ratio on carbonation rate is discussed, and data from concretes both from in service and laboratory mixes are considered. Cracking is the predominant defect observed on most of the examined concrete surfaces and the role of pozzolans on elastic deformations, creep and shrinkage of concrete in structures is discussed. Data suggest that, for those structures studied, the long-term durability of blended cement concretes is at least the equal of ordinary portland cement concretes under service conditions.
Roper, H, Kirkby, G & Baweja, D 1970, 'LONG-TERM DURABILITY OF BLENDED CEMENT CONCRETES IN STRUCTURES.', Publication SP - American Concrete Institute, pp. 463-482.
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Relatively little information has been published on the long-term durability of blended cement concretes in service. The paper is a summary of an investigation of over two hundred structures in Australia. Some of these have service lives in excess of twenty years. Cored materials from some of the structures are described, and petrological and mineralogical examination allow conclusions on the efficacy hydration processes under field curing to be made. Porosity and permeability is discussed. Carbonation and corrosion effects on long-term durability are considered by the examination of data obtained from in situ concretes.
Vigneswaran, S & Setiadi, T 1970, 'SPIRAL FLOCCULATOR: MATHEMATICAL MODELLING AND EXPERIMENTS.'.
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Spiral flocculator has been claimed to be a good method for continuous assessment of flocculation in water treatment plant, and overcome most of the limitations experienced in jar test procedure. This paper deals with the mathematical modelling of spiral flocculator performance. The effluent turbidity, and temporal variation of floc size and floc density were related to the velocity gradient and influent concentrations. These formulations were then verified with the experimental results obtained from the laboratory-scale spiral flocculator experimental study. The experimental study also revealed that the spiral flocculator has a better effective energy dissipation compared to that of jar test although the size of flocs in spiral flocculation seems to be overestimated relative to the real flocculator.
Ying, MS 1970, 'FIRST ORDER FUZZY PREDICATE LOGIC (I).', Proceedings of The International Symposium on Multiple-Valued Logic, pp. 242-247.
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Some tools for analyzing fuzzy measures (Sugeno's integrals, etc. ) are introduced into the semantics of first-order predicate logic to explain the concept of fuzzy quantifiers. The truth value of a fuzzy quantification proposition is represented by Sugeno's integral. With this framework, the concepts of formation rules, fuzzy valuations, and fuzzy validity are discussed.
