Showing papers by "University of Wollongong published in 1974"
TL;DR: Myrmekite is an intergrowth between vermicular quartz and (sodic) plagioclase situated next to potash feldspar, first detected by Michel-Levy in 1875 and named by Sederholm in 1899 as discussed by the authors.
58 citations
TL;DR: It is demonstrated that a Taylor series expansion of the lag term and ignoring high order derivatives may lead to serious errors and that it is, perhaps, easier and certainly more valid to apply numerical methods directly.
30 citations
TL;DR: In this article, a biological rhythm with a number of harmonics which were not apparent on visual examination of the experimental data, are revealed by the method of spectral analysis applied firstly to an artificial time series to illustrate the technique.
26 citations
14 citations
TL;DR: The pyrolytic conversion of peptide trimethylanilinium salts to their methyl esters in the direct insertion probe of a mass spectrometer was found to be most suitable for the derivatization of dipeptides in mixtures.
Abstract: The components of mixtures of dipeptides can be identified from the electron ionization and chemical ionization mass spectra of their N-acetylacetonyl methyl ester derivatives without prior separation. The pyrolytic conversion of peptide trimethylanilinium salts to their methyl esters in the direct insertion probe of a mass spectrometer was found to be most suitable for the derivatization of dipeptides in mixtures.
13 citations
TL;DR: In this article, the magnetic susceptibilities of the chloride, bromide, and nitrate adducts were determined as a function of temperature, and interpreted in terms of binuclear molecules with the copper atoms in a four-coordinated, approximately planar, ligand environment, and bridged by the phenolic oxygens of the organic ligand.
Abstract: The title compounds were prepared by the action of copper nitrate or halide on bis[N-n-butyl(5-chloro-α-phenyl-2-hydroxybenzylidene)aminato] copper(II) which in turn was obtained from the reaction of copper(II) acetate with the n-butylamine adduct of 5-chloro-2-hydroxybenzophenone. The magnetic susceptibilities of the chloride, bromide, and nitrate adducts were determined as a function of temperature, and are interpreted in terms of binuclear molecules with the copper atoms in a four-co-ordinated, approximately planar, ligand environment, and bridged by the phenolic oxygens of the organic ligand. The electronic and i.r. spectra and a full three-dimensional X-ray crystal and molecular structure determination on the bromo complex support these conclusions. The precise environment about the [graphic omitted] bridge in the bromo complex, and particularly the copper atoms, is in good agreement with that expected from the strength of antiferromagnetic interaction. All the complexes are believed to be four-co-ordinated, though the chlorine adduct is a dihydrate and the possibility of water co-ordination cannot be ruled out completely. A number of the i.r. peaks could be assigned unambiguously. E.s.r. spectra at 300 and 77 K of the binuclear complexes revealed only peaks due to the small trace of the monomeric parent complex remaining in these compounds.
10 citations
10 citations
8 citations
8 citations
01 Jan 1974
TL;DR: In this article, the authors consider a finite abelian group of order v and define supplementary difference sets (SDSs) as sets with certain multiplicities, where the multiplicity depends on the number of repetitions of the elements in the group.
Abstract: Let S1, S2,···, Sn be subsets of G, a finite abelian group of order v, containing k1, k2,...,kn elements respectively. Write Ti for the totality of all differences between elements of Si (with repetitions), and T for the totality of elements of all the Ti. We will denote this by T= T1 & T2 & ... & Tn. If T contains each non-zero element of G a fixed number of times, lambda say, then the sets S1, S2, ..., Sn will be called n-{v; k1, k2, ..., kn ; lambda} supplementary difference sets. Disciplines Physical Sciences and Mathematics Publication Details Jennifer Seberry Wallis, A note on supplementary difference sets, Aequationes Mathematicae, 10, (1974), 46-49. This journal article is available at Research Online: http://ro.uow.edu.au/infopapers/957 Vol. 10, fase. 1, 1974 Reprint from aequationes mathematicae BIRKHAUSER VERLAG BASEL A Note on Supplementary Difference Sets JENNIFER WALLIS (Newcastle, New South Wales, Australia) pages 46-49 Let S1' S2,···, Sn be subsets of G, a finite abelian group of order v, containing kl> k 2 , ••• , kn elements respectively. Write Ti for the totality of all differences between elements of Si (with repetitions), and T for the totality of elements of all the T i• We will denote this by T= T1 & T2 & ... & Tn. If T contains each non-zero element of G a fixed number of times, A say, then the sets S1' S2, ... ' Sn will be called n-{v; k1' k2' ... , k n ; A} supplementary difference sets. If k1 = k2 = ... = kn = k we will write 11{v; k; A} to denote the supplementary difference sets. If k1 =k2 = ... =ki' k i+1 =ki+2 = ... =ki+ j' ... , k z= ... =kn then sometimes we write 11-{V; i:k1,j:ki+1' ... ; A}. It can be easily seen by counting the differences that the parameters of 11{v; k1' k 2, ... , kn; ).} supplementary difference sets satisfy A(v 1) = L kj(kj -1). j= 1 We use braces, { }, to denote sets and square brackets, [ ], to denote collections where repetitions may remain. We now let v = 4r (2,1, + 1) + 1 = p Y, where p is a prime and further let H { 4r j + i . 0 --. --2'} i = X • ""'-J""'/, , i = 0, 1, ... , 4r 1 with x a primitive element of GF( v). Write for some m, O
7 citations
TL;DR: In this article, the extinction period of an instrumental learning paradigm was employed with kindergarten-age children who were working with a three-choice discrimination task and the analysis of the data showed that a crisis involving loss of reward from a social rather than a non-social source leads to greater disorganization and more fixed or rigid response from the children.
Abstract: To test the effects of some characteristics of a crisis on subsequent behaviour, the extinction period of an instrumental learning paradigm was employed with kindergarten-age children who were working with a three-choice discrimination task. The analysis of the data showed that: (a) a ‘crisis’ involving loss of reward from a social rather than a non-social source leads to greater disorganization and more fixed or rigid response from the children; (b) a ‘crisis’ requiring social rather than non-social responses results in the trying of more new responses and less frustration in boys and less ‘giving up’ by girls; and (c) girls who have experienced more reliable previous social sources of supplies withdraw less after a ‘crisis’ than those with less reliable sources. Both psychoanalytic and learning approaches were employed in discussing these findings and their implications for the future use of this laboratory analogue.
01 Jan 1974
TL;DR: The existence of long edge waves over a continental shelf is examined for a representative collection of shelf profiles in this article, where the frequencies of both trapped and leaky modes are found, when they exist, in terms of the shelf parameters.
Abstract: The existence of long edge waves over a continental shelf is examined for a representative collection of shelf profiles The frequencies of both trapped and leaky modes are found, when they exist, in terms of the shelf parameters Certain theoretical trapped waves over a semi-infinite shelf are shown not to exist in the real ocean
TL;DR: In this article, the bottom frictional stress is expressed as an arbitrary function of horizontal velocity rather than the linear function necessitated previously, and the model does not change the response of the sea from that determined by Heaps' method.
Abstract: Summary
The method for three-dimensional storm surge computation proposed by Heaps is modified by removing the bottom frictional stress from the vertical eigenfunction expansion. The stress is applied externally on each vertical column of fluid. Calculations on a simplified model show that the technique does not alter the response of the sea from that determined by Heaps’ method. The modification allows the bottom frictional stress to be expressed as an arbitrary function of horizontal velocity rather than the linear function necessitated previously.
TL;DR: In this paper, a tentative apparent polar wander curve for Australian Precambrian rocks is proposed to date the magnetic remanence of many rocks whose age of magnetization or remagnetization is imprecise, using this curve the CRMs of hematite ore deposits can be acquired up to hundreds of millions of years after the deposition of the host rocks.
TL;DR: In this paper, verbal intelligence, operational thinking, and divergent thinking were administered to thirty Aboriginal and thirty disadvantaged European children living in Alice Springs, N.T., Australia, and scores from three types of tests were correlated with each other to determine the relationship among them.
Abstract: Tests of verbal intelligence, operational thinking, and divergent thinking were administered to thirty Aboriginal and thirty disadvantaged European children living in Alice Springs, N.T., Australia. Scores from the three types of tests were correlated with each other to determine the relationship among them. Differences were sought between age ranges and ethnic groups on each of the three kinds of tests by means of t tests and analyses of variance. With the exception of the correlation between the Matrices Test and the Peabody Picture Vocabulary Test, the correlations were similar to those reported previously. The t tests confirmed significant differences between the Aboriginal and European sample on the PPVT. However, there were no significant differences between the Aboriginal and European sample on any of the other tests.
TL;DR: The utility of the ESE MO formalism in relation to ab initio results, when a typical small gaussian basis is employed, was examined in this paper. But the utility was not examined in the case of the FH, OH 2, NH 3, FCN, O 3 and OF 2.
01 May 1974
TL;DR: In this article, a new formalism for simplified molecular orbital calculations is elucidated, and the focus of the formalism is the production of a good approximation to the LCAO SCF F matrix of Roothaan's equations, and preoccupation with approximations to individual molecular integrals is avoided.
Abstract: A new formalism for simplified molecular orbital calculations is elucidated. The focus of the formalism is the production of a good approximation to the LCAO SCF F matrix of Roothaan's equations, and preoccupation with approximations to individual molecular integrals is avoided. The great majority of multicentre two-electron integrals of the exact formalism are found to be largely inconsequential to the attainment of a good approximation to the F matrix.
TL;DR: Instrumental learning of preschool children in Papua New Guinea (PNG) and Australia (AUST) was compared using two tasks (imitative and nonimitative) and two rewards (social and nonsocial).
Abstract: Instrumental learning of preschool children in Papua New Guinea (PNG) and Australia (AUST) was compared using two tasks (imitative and nonimitative) and two rewards (social and nonsocial). There were no differences between the two groups in the rate of acquisition measure of trials to criterion. PNG children made more late responses during acquisition and, for nil responses, there were group x task and group x reward x task effects. In the extinction phase, there were two main effects for trials to criterion: PNG children were more resistant to extinction than AUST children, and there was greater persistence in responding after social reward regardless of nationality. Reward x group, reward x task, and reward x group x task interactions also were observed in the extinction trials to criterion. In addition, there were three main task effects during extinction for other responses: on the imitative task, more wrong responses were made, and on the nonimitative task, more extra responses and more pair...
TL;DR: In this article, a completely theoretical parametrization of the essential-structural-elements molecular orbital formalism using Slater-type AO basis in the LCAO SCF procedure is discussed.
01 Jan 1974
TL;DR: In this paper, the common urinary and serum acids and phenolic acids have been separated and identified by gas chromatography (GC) and mass spectrometry (MS) of their neopentylidene alkyl ester and their trimethylsilyl (TMSi) derivatives respectively.
TL;DR: In this paper, a spindle basin is transformed into a square region with two entrances and the modified boundary value problem is solved approximately by the Galerkin method, and the trial functions are chosen to satisfy the boundary conditions across the entrances in the square region.
Abstract: Resonant and nonresonant motions in a spindle-shaped (i.e. formed by the intersection of two confocal parabolae) basin are examined when the assumption is made that they are caused by the formation of a standing wave due to incident wave action through the entrance. The spindle basin is transformed into a square region with two entrances and the modified boundary value problem is solved approximately by the Galerkin method. The trial functions are chosen to satisfy the boundary conditions across the entrances in the square region. The amplification of the incident waves is calculated for the internal points of the spindle basin at various frequencies and those frequencies causing large amplifications are found. The results are applied to Port Kembla Outer Harbor. Wave motion within a bay or harbor can be caused by external waves incident at the entrance. Two basic types of motion are the resonant, when the frequency of the incident wave matches one of the free modes of oscillation of the body of water, and the forced oscillation generated through the medium of a standing wave pattern, or clapotis, at the entrance. The wave motion within a harbor can be of much larger amplitude than that of the disturbance outside and is determined by the geometry of the basin. Design criteria for a harbor can best be obtained by first considering an idcalized port with simple geometry to approximate the real situation. For resonant motion we assumed that the incident wave pattern forms a standing wave system with the reflected wave in such a way as to create an antinode at the entrance. In these circumstances the bay or harbor oscillates as if it were undergoing free oscillations. The analysis is thus simplified and merely requires the frequencies and modes of the free oscillations. McNown (1953) explained the nonrcsonant motion by the formation of an external standing wave pattern such that the antinode is outside the entrance. The horizontal velocity at the entrance is thereby as
TL;DR: In this paper, the authors describe a scale modelling experimental technique, which can yield improved data on the division of fault return current within an earth grid, based on a 1 : 400 scale model of the earth grid of the Liddell power station of the Electricity Commission of New South Wales, Australia.
Abstract: The conductors in the earth-grid of a large electric power station must withstand for the maximum fault duration, current due to the worst case unbalanced fault. The fault duration and the worst case fault current may be calculated by well known means. However, the division of fault current when it is injected into the earth grid is difficult to determine with confidence. The authors describe a scale modelling experimental technique, which can yield improved data on the division of fault return current within an earth grid. Some results are quoted taken on a 1 : 400 scale model of the earth grid of the Liddell power station of the Electricity Commission of New South Wales, Australia.
TL;DR: An apparatus for studying learning rates in a simulated industrial or machine control environment is described, intended to facilitate research into the bisensory presentation of signals.
Abstract: An apparatus for studying learning rates in a simulated industrial or machine control environment is described. Four channels of signals are produced which activate either a light source, dials (meters), a vibrotactile unit, or all of these displays in combination on each channel. Input to the displays is by tape recorded signals of varying intensities. The occurrence of a stimulus signal and the response to it are recorded on a multiple channel event-recorder. The apparatus is intended to facilitate research into the bisensory presentation of signals.