1,721,253 research outputs found
Sutherland, David, [No Service Number]
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/420046Surname: SUTHERLAND. Given Name(s) or Initials: DAVID. Military Service Number or Last Known Location: [No Registration Number]. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 48808.244626
Item: [2016.0049.52307] "Sutherland, David, [No Service Number]
Transport characteristics of large Wood in headwater streams: insights from a restoration field study and physical modelling
No full textFluvial systems and their effective functioning are of the utmost importance. Large wood, although recognised as a potential hazard, is also an essential component in the majority of headwater streams. The amount of large wood in many watersheds is being purposefully increased due to rewilding, restoration or natural flood management projects, however, the relationships between the key drivers that determine large wood processes are not fully understood. The relationships between large wood loading and geomorphic complexity, as well as the effects of large wood loading, large wood configuration and large wood piece characteristics on large wood transport, are explored in this thesis. The approaches that have been used to investigate the research questions include original empirical field research, original scaled physical modelling and published empirical field research. Reach scale geomorphic complexity in relation to large wood loading has been quantified (positive correlation). The effect of configuring large wood as structures mimicking logjams (post-assisted log structures) has been shown to increase large wood retention and decrease median large wood transport distances. Additionally, the large wood piece characteristics dimensionless length and dimensionless diameter are related to large wood movement status and large wood transport distance. The large wood near functional immobility threshold has been refined, and very short dimensionless length (0–0.35) and small to moderate dimensionless diameter (0.1–0.4) large wood pieces are transported the greatest distances. The implications of these findings are that large wood processes are now better understood, particularly in a restoration context. As there are feedbacks between key large wood process parameters including large wood loading, geomorphic complexity and large wood transport, good understanding of these processes is vital to minimise uncertainty and error propagation so that meaningful estimations can be achieved. Better forecasting of system state changes in relation to large wood can be utilised to predict how a system may respond to large wood manipulations, thus enhancing decision-making relating to large wood. In particular, this is crucial for rewilding, restoration or natural flood management projects, especially as specific configurations of treatment wood can promote greater large wood retention and geomorphic complexity. Additionally, understanding the likelihood of movement and the potential transport distances for individual large wood pieces helps to quantitatively assess large wood hazard
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
Low-cost unmanned aerial vehicle-based digital hemispherical photography for estimating leaf area index: a feasibility assessment
No full textUnmanned aerial vehicles (UAVs) have the potential to provide highly detailed information on vegetation status useful in precision agriculture. However, challenges are associated with existing techniques for UAV-based retrieval of vegetation biophysical variables such as leaf area index (LAI), including variable illumination, bidirectional reflectance effects, and the need for image calibration, mosaicking, and normalization. We investigated an alternative approach that avoids these challenges whilst still providing spatially explicit estimates of LAI, using UAV-based digital hemispherical photography (DHP). LAI estimates were obtained using a low-cost UAV-based DHP system over a winter wheat field in Southern England. Point-based estimates were interpolated to provide spatially continuous datasets, which successfully described patterns of vegetation condition. The UAV-based DHP data were compared to ground-based LAI estimates, demonstrating good agreement (root mean square error (RMSE) = 0.10, normalized RMSE (NRMSE) = 3%).</p
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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