1,720,964 research outputs found
Meso-cenozoic intraplate magmatism along the Australian southern margin
Full text linkThe eastern and south-eastern Australian passive continental margins host a series of Cenozoic basins preserved in onshore and offshore Victoria, Tasmania and South Australia. Deposition in these basins was concurrent with the Cenozoic Magmatic Province that extends along the Australian eastern and south-eastern Australian passive continental margin. Although classified as a ‘non-volcanic’ passive margin, a large record of igneous rocks is preserved within the Cretaceous to Miocene syn- and post-rift successions of the offshore basins. Previous studies have mainly focussed on onshore magmatic activity and resulting geodynamic models have proposed on mantle plumes or edge-driven convection. Offshore 2D and 3D seismic reflection datasets in the Bass and Gippsland Basins analysed in this thesis have shown that the magmatism in these areas occurred during the Late Cretaceous, Eocene to Oligocene and Miocene to Recent times. The majority of magmatism significantly post-dates continental break-up and basin rifting related to the separation of Australia and Antarctica, which started around 85 Ma. This thesis presents major and trace element and isotope geochemistry of Cenozoic igneous rocks in onshore Tasmania and in the offshore Gippsland and Bass Basins. The data presented suggest that magmas have formed over a thermal upwelling with a long time-integrated high 238U/204Pb or μ (HIMU) signature that traversed a Pacific Mid-Ocean Ridge Basalt (MORB) -like asthenosphere and interacted with the mantle lithosphere. Tasmanian lavas formed at different depths with shallow silica-oversaturated melts undergoing larger degrees of melting than deeper silica-undersaturated melts (> 20 kbar). These shallow melts have then mixed with a remnant source of Ferrar Jurassic magma, related to Gondwana break-up, residing in the lithosphere. Magmas formed in the Gippsland and Bass Basins formed under similar conditions as the shallow silica-oversaturated melts with varying Oceanic Island Basalt (OIB) to Upper Continental Crust (UCC) trace element signatures. Regional 3D seismic mapping of the Gippsland Basin reveals a laterally (>40 km) and vertically extensive magmatic plumbing system comprising more than 186 intrusions. This network of sills shallows from the central part of the basin towards the basin-bounding faults at the northern margin, where magmas were ultimately extruded onto the palaeo-surface during the Late Cretaceous. A second style of magmatic activity occurred during the Middle Eocene, resulting in a volcanic cone complex in the centre of the basin, which has likely been fed through vertical to near-vertical dykes or via faults. Palynology of surrounding sediments intersected by petroleum wells indicates that magmatic activity in the Bass Basin is generally younger than that of the Gippsland Basin with activity being most abundant during the Miocene. Cretaceous to Eocene magmatic activity mainly occurred at major normal faults near the basin margins, while Miocene magmatism is focussed in the centre of the Cape Wickham Sub-basin of the Bass Basin. In contrast to the Gippsland Basin, the main direction of magma transport through the upper crust was more vertically through dykes and/or faults. This phase of Miocene magmatic activity is characterised by a southward younging trend similar to the southward younging trends of the hotspot trails observed on the Australian mainland. Although the Gippsland and Bass Basin are adjoining basins, the magmatic plumbing styles observed differ significantly. These results provide insights into the origin, cause and plumbing into intraplate magmatism occurring along the Australian south-eastern margin and magma transport through sedimentary basins, in general.Thesis (Ph.D.) -- University of Adelaide, School of Physical Sciences, 201
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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