1,147 research outputs found
Dance North performance of World Cafe, choreographed by Graeme Watson, performed by Debbie Clements and Csaba Buday, 1993 [picture] /
No full textPart of the collection: Papers of Cheryl Stock.; "World Cafe 1993. Choreographer: Graeme Watson. Music: Shella Chandra. Design: Michael Pearce. Dancers: Debbie Clements and Csaba Buday. Photo: Ned Kelly"--Verso.; Title devised by cataloguer.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.ms-ms8354-0-1
Interview with Graeme Hugo
No full textGraeme Hugo is Federation Fellow, Professor of the Discipline of Geographical and Environmental Studies and Director of the National Centre for Social Applications of Geographical Information Systems at the University of Adelaide. He is the author of over 200 books, articles in scholarly journals and chapters in books, as well as a large number of conference papers and reports
Ros Hervey, publicity still [for Graeme Watson's] "Pile up" June 1990 [picture] /
No full textCondition: Good, mounted on board.; Caption: "Roz [i.e. Ros] Hervey, publicity still, Pile up 6/90"--Lower centre. "Photographer: Regis Lansac. Meryl Tankard Dance Co. Roz Harvey [i.e Ros Hervey] - publicity still, 'Pile up' 6/[90]"--Printed label attached to verso.; Part of the collection: Portraits of Meryl Tankard in 1984 and 1988 and scenes from Meryl Tankard Company productions 1989-1992.; Title from caption and from accompanying documentation, see file 204/17/00075. "Publicity shot for Graeme Watson's "Pile up", Meryl Tankard Company 1990"--Accompanying documentation, see file 204/17/00075
Promotional image of Claire Stonier and John Knobbs for Ha Ha choreographed by Graeme Watson, circa 1982. Adelaide, SA. Photograph by Grant Hancock.
No full textPromotional image of Claire Stonier and John Knobbs for dance performance Ha Ha, choreographed by Graeme Watson
Graeme Base, 1983
No full textPhotograph originally appeared in the 'Swinburne News', May 1983. Graeme Base, children's author and illustrator. Swinburne Alumnus (Diploma of Art and Graphic Design 1978)
Baker, Graeme L. - Biology Professor
No full textDr. Graeme L. Baker, Professor of Biology, wearing a suit. He was the co-author of Biology, Ecology and Systematics of Australian Scelio: Wasp Parasitoids of Locust and Grasshopper Eggs with Paul Dangerfield and Andrew Austin.https://stars.library.ucf.edu/univphotocollection/1237/thumbnail.jp
Significant extension in northern Australia of the known geographic range of the Shield Shrimp Triops australiensis (Crustacea: Notostraca)
No full textMichael J. Tyler, Margaret Davies, Graeme F. Watson, David J. William
How epigenetic evolution can guide genetic evolution (abstract)
No full textThe expression level of a gene in future generations can be modified both by genetic mutations and by the attachment of methyl groups to the DNA. Since the DNA methylation pattern along a genome is inherited, methylation patterns constitute a significant epigenetic inheritance mechanism that is subject to evolution by natural selection. The variation rate of methylation patterns is generally higher than that of DNA which suggests that evolution of methylation patterns might be more rapid than that of genetic evolution. But, common consequences of methylation, such as reduced expression of methylated genes, could also be produced by genetic changes and these would have higher heritability. The question we address in this work is how the evolution of epigenetic methylation-dependent phenotypes might interact with the evolution of genetic DNA-determined phenotypes. There is no biological mechanism known to directly transfer methyl groups into equivalent DNA changes. However, in principle an indirect mechanism could cause evolved methylation patterns to enable the subsequent evolution of equivalent genetic patterns in a manner analogous to the Baldwin effect (Baldwin, Am. Nat., 30:441-451, 1896; Jablonka et al, TREE, 13:206-210, 1998). The Baldwin effect describes how non-heritable acquired characteristics can influence the evolution of equivalent genetic characteristics without any direct Lamarckian inheritance of acquired characters. This occurs because the ability to acquire or learn a new behaviour changes the selective pressures acting on genetic changes. Specifically, genetic changes that support this behaviour, e.g. by reducing learning time by making a small part of the behaviour genetically innate, may be selected for when the learning mechanism is present even though these same genetic changes may not be selected for when the learning mechanism is absent. Over generations, the modified selection pressures so produced can cause genetic assimilation of a phenotype that was previously acquired, even to the extent of making the acquisition mechanism subsequently redundant. Thus a learned behaviour can guide the evolution of an equivalent innate behaviour (Hinton & Nowlan, Complex Systems, 1: 495-502, 1987). In the Baldwin effect a rapid mechanism of lifetime adaptation guides the relatively slow genetic evolution of the same behaviour. By analogy, Jablonka et al have suggested that “genetic adaptations may be guided by heritable induced or learnt phenotypic adaptations”. Here we hypothesise that “inherited epigenetic variations may be able to ‘hold’ an adapted state for long enough to allow similar genetic variations to catch up”, as they put it, even if the epigenetic variations are not induced or learnt but simply evolved by natural selection on methylation patterns. We assume that an individual may only express one phenotype in its lifetime, but that a given genome will persist relatively unchanged on a timescale that allows its methylome to adapt by natural selection. Thus, in contrast to the Baldwin effect, in this case two mechanisms of evolution by natural selection are coupled — one acting at a different variation rate from the other. We present a simple model to illustrate how a rapidly evolving methylome can guide a slowly evolving but highly-heritable genome. This is used to show that methylome evolution can enable genetic evolution to cross fitness valleys that would otherwise require multiple genetic changes that were each selected against. This finding suggests that the relatively rapid evolution of methylation patterns can produce novel phenotypes that are subsequently genetically assimilated in DNA evolution without direct transfer or appeal to induced phenotypes. This can enable the genetic evolution of new phenotypes that would not be found by genetic evolution alone, even if methylation is not significant in the ultimate phenotype
The origin of the electron distribution in SnO
No full textThe origin of the electron distribution in SnO
Graeme W. Watson
Department of Chemistry, Trinity College, Dublin 2, Ireland
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Received 12 September 2000; accepted 17 October 2000
!
Gradient corrected density functional theory calculations have been performed on SnO in the
litharge and idealized CsCl structures with the litharge structure in good agreement with experiment.
The CsCl structured SnO has a spherical electron density whereas the litharge structured SnO has
a nonspherical electron distribution. Such asymmetry is often attributed to a sterically active lone
pair formed by the 5
s
2
electrons which does not take part in chemical bonding. However, analysis
of the density of states and band structures indicates that the situation is more complicated. In CsCl
structured SnO mixing of the Sn 5
s
with the oxygen 2
p
electronic states results in filled bonding
and antibonding combinations. The antibonding combinations, at the top of valence band, can
interact with Sn 5
p
to stabilize the structure, only when in the distorted litharge structure resulting
in the asymmetric electron density. This is in contrast to the classical theory of hybridization of the
tin 5
s
and 5
p
orbitals to form a ``lone pair?? as the asymmetric electron distribution is the result of
the tin?oxygen covalent interactions
A dwelling place in bits
No full textThis paper considers computed means for constructing and interrogating prehistoric architectures. We ask where the ‘landscapes’ created through points and arcs divide us from the prehistory we seek and whether in fact these virtual landscapes offer new prehistoric places in which to dwell. Taking as a starting point the formulation of models of prehistoric space the paper considers how habitual computed action, constrained as much by technological systems as by archaeological information, and informed by analytical approaches to such ‘architectures’, defines places usefully from which to consider dwelling choices and dwelling experiences. By considering the development of landscape as a complex cultural continuum, incorporating both prehistoric architectures and natural features reinterpreted through the environmental experience of successive generations, it becomes possible to produce parallel dwelling places in virtual worlds which we can inhabit, and from which we can develop novel narratives of the past
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