1,721,106 research outputs found
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
Morphometric analysis of UK lake systems as a compliance tool for the European Water Framework Directive
No full textThe European Water Framework Directive 2000 (WFD) stipulates that surface water bodies, such as lakes, should achieve good ecological and chemical status (pollutant levels) by 2015. However, the extant environmental monitoring programmes of most member states have major deficiencies in terms of the baseline data required, thus potentially jeopardising the compliance schedules of the WFD. Great Britain has over 40 000 lakes >1 ha, but bathymetric data are available for less than 2%. This paper presents a collation of available bathymetric data (622 sites) and demonstrates the utility of morphometric analysis to bridge the gap between surveyed and un-surveyed systems. Type-specific relations between mean (Dmv) and maximum (Dmax) water depths were developed for natural lakes (r2 values ranging from 0.87 to 0.99), as well as modified systems and impoundments (r2 values ranging from 0.74 to 0.99). Stepwise regression was also undertaken to predict Dmv and Dmax using only map-derived information (such as lake area, catchment area and shoreline length). The results varied markedly between “geological types”, with “medium alkalinity” (MA) lakes giving the highest coefficients of determination (R2 of 0.79 and 0.82, respectively). Predicting Dmv is important because it permits calculation of parameters such as the volume (V) (and hence residence time) and dynamic ratio (DR) which provides a measure of the likely extent of sediment re-suspension. This preliminary analysis has demonstrated the potential of the morphometric approach to generate valuable parameters from limited field investment and will provide a valuable stop-gap until the results of the WFD’s comprehensive monitoring programmes are realized
Morphometric analysis of UK lake systems as a compliance tool for the European Water Framework Directive
No full textThe European Water Framework Directive 2000 (WFD) stipulates that surface water bodies, such as lakes, should achieve good ecological and chemical status (pollutant levels) by 2015. However, the extant environmental monitoring programmes of most member states have major deficiencies in terms of the baseline data required, thus potentially jeopardising the compliance schedules of the WFD. Great Britain has over 40 000 lakes >1 ha, but bathymetric data are available for less than 2%. This paper presents a collation of available bathymetric data (622 sites) and demonstrates the utility of morphometric analysis to bridge the gap between surveyed and un-surveyed systems. Type-specific relations between mean (Dmv) and maximum (Dmax) water depths were developed for natural lakes (r2 values ranging from 0.87 to 0.99), as well as modified systems and impoundments (r2 values ranging from 0.74 to 0.99). Stepwise regression was also undertaken to predict Dmv and Dmax using only map-derived information (such as lake area, catchment area and shoreline length). The results varied markedly between “geological types”, with “medium alkalinity” (MA) lakes giving the highest coefficients of determination (R2 of 0.79 and 0.82, respectively). Predicting Dmv is important because it permits calculation of parameters such as the volume (V) (and hence residence time) and dynamic ratio (DR) which provides a measure of the likely extent of sediment re-suspension. This preliminary analysis has demonstrated the potential of the morphometric approach to generate valuable parameters from limited field investment and will provide a valuable stop-gap until the results of the WFD’s comprehensive monitoring programmes are realized
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
Rowan, John, A Dialectical Paradigm for Research, pp. 93-112 in Peter Reason and John Rowan, eds., Human Inquiry . New York: John Wiley and Sons, 1981.*
No full textPuts forth an approach to human inquiry that relies on multiple types of questions and multiple cycles of data gathering
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
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