578 research outputs found
An investigation into damage initiation and propagation in carbon fibre reinforced plastics
No full textIn this investigation into the initiation and propagation of damage in CFRP materials, a method was first established whereby damage could be induced, during flexure, at the centre of thin plate-like cantilever specimens. An acceptable clamping shape was found using 3-D Finite Element modelling. This technique was also useful in deducing the types of stress that were responsible for delamination, and in assessing the fatigue resistance of various layups. Results were confirmed by Thermography and Scanning Electron Microscope results. Experimental results indicated that damage initiation during flexural fatigue occurred earlier for higher surface strains, and that subsequent delamination affected damping, natural frequency and static stiffness of specimens. There was also shown to be the possibility of the existence of a fatigue strain limit for the material. Experimental and theoretical work was extended to examine the condition of in-plane stress with superimposed dynamic excitation. Here, difficulty was experienced in designing experiments complementary to F.E. models. However, results predicted the direction of damage propagation and that the presence of in-plane stresses could be detrimental to fatigue life. A more refined F.E. model in which delamination could be opened between desired layers, indicated that shear stresses were greater the further the delamination was sited from the neutral plane. Since failure during experiments always occurred between the same two layers, this suggested that high shear stresses had a stronger influence upon crack initiation than small defects which might have occurred anywhere throughout the thickness. Acoustic Emission work demonstrated the existence of 'micromechanical' damage, which was suspected to be fibre breakage. At a constant amplitude of dynamic flexural loading, emissions occurred initially, but after a certain time ceased almost completely. A hypothesis was suggested to account for such mechanisms, and their possible influence upon delamination
A review of the Indo-Australian subgenus Parasinodacus Drew and Romig of 'Bactrocera Macquart' (Diptera: Tephritidae: Dacinae)
No full textThe 'Bactrocera' Macquart subgenus 'Parasinodacus' Drew and Romig is reviewed and 19 species recognised, including six transferred from other subgenera: 'B. (P.) absoluta' (Walker) and 'B. (P.) atypica' White and Evenhuis (newly transferred from 'Asiadacus' Perkins), 'B. (P.) abdopallescens' (Drew) and 'B. (P.) perpusilla' (Drew) (formally transferred from 'Sinodacus' Zia), 'B. (P.) hoedi' White and 'B. (P.) pura' White (newly transferred from 'Zeugodacus' Hendel). A key to species is included.Full Tex
A review of the subgenus Javadacus Hardy of Bactrocera Macquart (Diptera: Tephritidae: Dacinae)
No full textThe Bactrocera Macquart subgenus Javadacus Hardy is reviewed and five SE Asian species recognised. Four additional species from SE Asia and Australia, previously included in Javadacus, are transferred to subgenus Bactrocera, with B. unirufa Drew placed as a new synonym of B. melanothoracica Drew. Based on its type species, subgenus Javadacus is included in the Zeugodacus groip of subgenera. A key to species is included.Full Tex
A review of the subgenera Apodacus Perkins, Hemizeugodacus Hardy, Neozeugodacus May, stat. rev., Semicallantra Drew and Tetradacus Miyake of Bactrocera Macquart (Diptera: Tephritidae: Dacinae)
No full textThe Indo-Australian subgenera Apodacus Perkins (= Heterodaculus Hardy, syn. n.), Hemizeugodacus Hardy, Neozeugodacus May, stat rev., Semicallantra Drew and Tetradacus Miyakc of Bactrocera Macquart are reviewed. Bactrocera (Tetradacus) superba Drew & Romig is newly transferred from subgenus Semicallantra, B. (.Asiadacus) fuscans (Wang) is removed from synonymy with B. (Tetradacus) brachycera (Bezzi) and B. (Bactrocera) fuscalata Drew is transferred from subgenus Heterodaculus. The subgeneric placement of B. (Zeugodacus) arisanica (Shiraki) is discussed. Keys to the 23 included species are provided.Full Tex
A review of the subgenus 'Bulladacus' drew and hancock of 'bactrocera' Macquart (Diptera: Tephritidae: Dacinae), with description of two new species from Papua New Guinea
No full textThe 'Bactrocera' Macquart subgenus 'Bulladacus' Drew and Hancock is reviewed. 'Bactrocera (Bulladacus) trilobata' sp. n. and 'Bactrocera (Bulladacus) wanangiae' sp. n. are described from Papua New Guinea. 'Bactrocera obtrullata' White and Evenhuis, 1999, is placed as a new synonym of 'B. diaphana' (Hering, 1953); both were described from Papua Province in eastern Indonesia. The Solomon Islands species 'B. unipunctata' (Malloch) is transferred from subgenus 'Bactrocera' to 'Bulladacus'. Males of 'B. aceromata' White and Evenhuis are newly described. Records of 'B. mcgregori' (Bezzi) from Singapore, West Malaysia and the Andaman and Nicobar Islands are regarded as misidentifications of 'B. cinnabaria' Drew and Romig. 'Bactrocera pacificae' Drew and Romig is newly recorded from Papua New Guinea. A key to the 20 known species is included.Griffith Sciences, School of Natural SciencesFull Tex
A review of the Indo-Australian subgenera 'Heminotodacus' drew, 'Paradacus' perkins and 'Perkinsidacus' subgen. n. of 'Bactrocera' macquart (Diptera: Tephritidae: Dacinae)
No full textThe Indo-Australian subgenera 'Heminotodacus' Drew (1 species) and 'Paradacus' Perkins (7 species) of 'Bactrocera' Macquart are reviewed and a new subgenus, 'Perkinsidacus' subgen. n., is proposed for two Australasian species: 'Bactrocera banneri' White from Morotai, northern Moluccas and 'B. coracinus' (Drew) [type species] from Papua New Guinea. These three subgenera belong in the 'Zeugodacus' group of subgenera and are distinguished by the presence of 2 pairs of scutellar setae and no medial yellow vitta on the scutum. A key to the ten species placed in these three subgenera is included.Full Tex
2007 Colin Roderick Lecture
No full textLet me thank my audience for coming to listen to me today: let me thank the Foundation for Australian Literary Studies for inviting me to give this year’s Colin Roderick Lectures.<br />I like to think that Professor Roderick would have looked kindly on the choice of a lecturer drawn from the bleak, ambiguous demi-monde where journalism and literary endeavours meet - for he was involved, as many of you will know, during his days as an editor at Angus and Robertson, in the celebrated libel case in 1961 over “The Bandar-Log,” a novel, still unpublished, by the distinguished Canberra press gallery journalist, Alan Reid. Roderick’s own writings had a strong influence on me at a particular point in my path as an author: but the one act of his that resonates most strongly in my thoughts is the decision he made, 40 years ago, to establish a centre for the study of Australian writing here in the North.</jats:p
Polyphony and the anxiety of influence in the fiction of Henry James
No full textJames's fiction, especially in the Middle Phase, centres
on the figure of the artist and is characterized by, the two
interrelated aspects which previous criticism has largely
overlooked: the Bakhtinian 'polyphonic' -creation of
'author-thinkers'; and the conflict between ephebes and
precursors, for which Harold-Bloom's concept of 'the-anxiety of
influence' is the most illuminating model. Polyphony is the
narrative mode, and influence is the intra-artistic, theme.
These, as the Introduction to the thesis makes clear, are
rehearsed in James's inaugural novel, Roderick Hudson. Rowland
Mallet is an author-thinker, and his failure is caused by
authorial limitations. His monologism -is impaired by his
mistaking empathy for the authorial sympathy. Likewise,
Hudson's failure does not arise from a mercurial temperament,
but from a polyphonic shortcoming: not possessing the power of
fiction to contain the fiction of power in, his mentor. And the
relationships among the three artists - Gloriani, Hudson and
Singleton - perfectly exemplify the Bloomian-theme. It is these
two concepts, polyphony and influence, which are the major
preoccupation in the Middle Phase; as, the works chosen
demonstrate. These are a novella, a novel, and a number of
short stories all of which have been unjustifiably neglected.
Chapter One, on The Aspern Papers, argues that Tina Bordereau,
far from being, the artless victim seen by many critics,
actually challenges and defeats the narrator by the very form
of her narrative. Her 'realist' discourse undermines his
language of 'romance', and shows up its internal unstability.
Chapter Two is an extensive study of the critical reception of
The Tragic Muse. The most common areas of critical attention
have been its contemporary topicality, its relation to previous
novels on similar themes, and the possible genealogy of Gabriel
Nash. Those have all missed the core of the work. - Chapter Three
demonstrates how polyphony and the anxiety of influence make
the novel what it really is. Influence arises from the
juxtaposition of, and the wrestling between, artistic ephebes
and their precursors (Nick and Nash,, Miriam and Madame Carre).
The dialogic quality defined by Bakhtin is crucial to the
proper, and even-handed, characterization of all, the conflicts
in the novel. And since most of James's tales in the eighties
and nineties -are about 'masters - and acolytes, the anxiety of
influence remains central. Chapter Four is a study of 'The
Author of Beltraffiol' and 'The Lesson of the Master'. Again the
characters' manipulations are a crucial focus in a way that
G6rard Genette's terminology helps to illuminate. The fact that
the ephebe is the author-thinker emphasizes the inextricability
of the Bakhtinian and the Bloomian in James. Just as
polyphony offers a different focus for explicating the poetics
of James's fiction; so the ephebal conflict provides the basis
for a fresh perception of James's own artistic struggle
A Review of the Subgenus Austrodacus Perkins of Bactrocera Macquart (Diptera: Tephritidae: Dacinae)
No full textThe Bactrocera Macquart subgenus 'Austrodacus' Perkins is reviewed and 5 species recorded from Australia and New Guinea are included: 'B. abdoaurantiaca' Drew, B. alampeta Drew, 'B. atrisetosa' (Perkins), B. cucumis (French) and 'B. papuaensis' (Malloch), comb. n. (= 'unichromata' Drew, syn. n.). Subgenus 'Hemiparatridacus' Drew is placed as a new synonym of subgenus 'Austrodacus and its sole species, 'B. abdoaurantiaca', is transferred, while 'B. alampeta', 'B. atrisetosa' and 'B. papuaensis' are transferred to 'Austrodacus' from subgenus 'Paratridacus' Shiraki. A fourth Papua New Guinean species previously included in 'Paratridacus, B. mesonotaitha' Drew, is transferred to subgenus 'Zeugodacus' Hendel as a close ally of 'B. (Z.) sandaricina' Drew.Full Tex
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