1,721,052 research outputs found
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
Irrigation of urban trees
No full textIrrigation can directly ameliorate urban microclimate and thermal comfort and can reduce the 'urban heat island' effect. Irrigation alters surface heating, heat reflection, turbulent air mixing, and heat exchange between the air and the building, thus decreasing the external thermal load of buildings. Considering that urban areas account for 67–74 percent of global energy use, a city-wide wise irrigation program may effectively reduce urban heat island and energy use during summer. The choice of irrigation method is critical for efficient watering of urban trees. Common watering methods include: hand irrigation; sprinklers, sprays, and microsprays; surface drip; subsurface drip; watering wells and trenches; and water storage devices with controlled release of water. Estimating the irrigation needs of urban green areas with mixed vegetation is extremely challenging, but it is a key requirement for getting the most benefit from urban trees while saving water. Plant water needs can be accurately estimated with several methods accurately reviewed by Nouri and his tea
Fertilization in the urban landscape
No full textUrban soils show high variability regarding the content and availability of different nutrients. Nitrogen is usually lower in urban soil than in agricultural soil, because soil sealing in urban areas can have negative consequences for soil fertility and long-term storage of nitrogen. In urban environment nutrient use efficiency (NUE) is a crucial marker for plant growth. The great ecological heterogeneity of urban soils enhances variability in nitrogen content and availability, making difficult the standardization of fertilization management in urban soils. Before planning a fertilization schedule, soil should be analysed to assess nutrient availability or deficiencies. Main parameters to be assessed are: pH, organic matter, nitrogen, phosphorus, major cations and micronutrients. The management of fertilization practices in urban landscape should aim at maintaining trees in an adequate nutritional status to provide the wide variety of benefits that trees can supply in urban setting
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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