1,721,182 research outputs found
Windermere Multibeam Bathymetry Data
No full textMultibeam Bathymetry Data was collected by the British Geological Survey in September 2010 in association with the University of Southampton in both the north and south basins of Windermere in the English Lake District. Data was analysed by Helen Miller and Jonathan Bull from the University of Southampton as well as Carol Cotterill from the British Geological Survey. The data is freely available for download and it would be appropriate to cite the following reference when using the data:
Miller, Helen, Bull, Jonathan M., Cotterill, Carol J., Dix, Justin K., Winfield, Ian J., Kemp, Alan E.S. and Pearce, Richard B. (2013) Lake bed geomorphology and sedimentary processes in glacial lake Windermere, UK. Journal of Maps, 9, (2), 299-312. (doi:10.1080/17445647.2013.780986).
The data is not appropriate for navigational use.
Further information on the survey is available at:
http://www.bgs.ac.uk/research/highlights/2013/lakeWindermere.html
A pdf map of the multibeam data is available for download, and the data can be downloaded here at 1 m and 5 m resolutions from the north and south basins of Windermere.</span
Lake bed environments, modern sedimentation and the glacial and post-glacial history of Windermere, UK
No full textWindermere, the largest natural lake in England, is a glacial ribbon lake located in the southeast of the Lake District. High resolution geophysical datasets, combined with sediment analysis, geomorphological mapping and historical research have been used to investigate the lake bed environments, recent sediment record of pollution and glacial and post-glacial history of the lake and surrounding catchment.The data are used to generate a present-day landscape map of Windermere, revealing a complex landform record characterised by nine sub-basins, separated by steps, ridges and isolated topographic highs related to the retreat of the British and Irish Ice Sheet (BIIS). Debris flows and anthropogenic features are superimposed on the general bathymetric framework formed since the Last Glacial Maximum.Analysis of sediment cores and correlation with existing seismic data have revealed key stratigraphic facies extend across the lake basin, and consist of a drape of Holocene gyttja overlying glaciolacustrine and lacustrine sediment fill relating to retreat of the BIIS. Analysis of geophysical core properties have identified a peak in magnetic susceptibility and iron which possibly represents a change in relative input from different ice masses. Onshore mapping of Troutbeck Valley identifies a series of depositional environments, including recessional moraines formed by still-stands or small readvances of an outlet glacier. Following deglaciation through disintegration into a number of independent ice caps, major sediment redistribution led to formation of a large fan delta via paraglacial and post-glacial sedimentation.The sedimentology of Windermere is characterised by five distinct lake bed facies showing a dominance of gyttja, representing recent Holocene sedimentation derived from the catchment over the last 10,000 years. Coarser sediments (gravel and fine sand) are found in lake-marginal shallow water. High resolution geochemical data, radiochronology and isotopic analysis have revealed significant increases in lead, zinc and copper in recent lake sediments. The principal sources of anthropogenic lead contamination are gasoline lead, Carboniferous coal (most likely source is coal fired steam ships) and lead derived from Carboniferous Pb-Zn mineralisation (mining activities). A number of up-system sediment traps have limited the amount of mining related heavy metals entering Windermere. As a result, many peaks in heavy metals do not correlate with periods of metal workings, but recent increases are possibly due to flood-induced metal inwash. Elevated concentrations of zinc and filamentous growths on the lake bed are attributed to sewage inputs. Geophysical, physical and visual surveys of twelve demonstrated or putative spawning grounds of Arctic charr (Salvelinus alpinus) suggest suitable spawning habitat in Windermere is limited and siltation by fine sediments has occurred over the past 50 years.The integrated approach used in this study has shown that a catchment analysis, using several datasets and techniques, can be used to inform wider regional and ice sheet wide glacial reconstructions. This approach, which can be applied to other lacustrine environments, is capable of determining modern lake bed habitats and the sediment record of pollution, and further demonstrates the value of lake sediments as a high resolution record of local and regional environmental change
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
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