1,721,154 research outputs found
Letter: Mary L. Webb to Ida M. Tarbell, August 28, 1928
No full textHandwritten letter, 1Letter of two page
Woodland history and management in the Oxfordshire Chilterns: implications for the future
Get PDFDuring the 20th century, woodland fragmentation and changes in composition have had an impact on the woodland ecology of lowland England. Government policy which initially focussed on softwood timber production, now aims to protect, enhance, restore and expand native deciduous woodland. These initiatives arguably will have the greatest ecological impact if they employ a landscape scale approach to ensure maximum woodland connectivity whilst retaining landscape character.
This research investigated woodland change over the last 160 years in the Oxfordshire Chilterns. The Chilterns, characterised by beech woodland, is one of the most wooded areas in lowland England. Digital analysis of two types of historic maps, combined with historic documentary evidence, enabled a quantitative analysis of woodland composition alongside comparison of change over time. The research investigated hypothetical future scenarios for both woodland creation, based on historically wooded sites identified by the research, and restoration of non-native plantations to native species. These scenarios were shown to improve woodland connectivity and to increase patch size in comparison with BAP targets. These methods allowed the retention of the characteristic mosaic Chiltern landscape.
Between 1840 and 1883, woodland extent reduced by only 4.6% but by 1883, 16.96% of native deciduous woodland had been converted to mixed woodland. In the 20th century, native woodland increased by 7.6%, still 12% less than in 1840, but mixed (26.13%) and coniferous woodlands (9.73%) increased markedly due to Government policy. These changes resulted in increased fragmentation of native deciduous woodland over time. Future restoration and creation scenarios improved woodland connectivity by increasing patch size and reducing near-neighbour distance; but to reach 30% woodland cover to
create a habitat network, total woodland restoration combined with woodland creation is necessary, far exceeding BAP targets.
In this research, historic information identifies regional native woodland type and past management which needs to be recognised in policy and information dissemination. More importantly, it provides the information necessary to retain the local cultural landscape pattern while enhancing ecological connectivity and is therefore a valuable method which could be applied elsewhere
A Comparative Study of the Argentometric and the Mercurimetric Methods for the Determination of Chloride
No full textThe object of this thesis to present a comparison of certain standard volumetric methods for the determination of chloride, including argentometric and mercurimetric methods, from the standpoint of accuracy, time required, difficulties encountered, cost of materials, and their consequent practicality in the college laboratory.ProQuest Traditional Publishing Optio
Teaching Teachers for the Future : an Australian government national project
No full textThis paper describes the Teaching Teachers of the Future (TTF) Project – a national project funded ($8.8mil AUD) by the Australian Government. The project was aimed at building the capacity of student teachers to use technology to improve student learning outcomes. It discusses the aims and objectives of the project, its genesis in a changing educational and political landscape, the use of TPACK as a theoretical scaffold, and briefly reports on the operations of the various components and part-ners. Further, it discusses the research opportunities afforded by the project includ-ing a national survey of all PSTs in Australia gauging their TPACK confidence and the use of the Most Significant Change (MSC) methodology. Finally the paper dis-cusses the outcomes of the project and its future
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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