1,723,968 research outputs found
The influence of soil moisture and trampling on germination and development of the seedlings of four Plantago species at various degrees of soil compactness
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6185.pdf (Publisher’s version ) (Open Access
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
HPIC analysis of phosphite and phosphate extracted from plant samples
Get PDFDiseases caused by members of the genus Phytophthora have, for a long time, been recognised globally as among the most devastating plant diseases. In Australia, diseases caused by Phytophthora spp. cause widespread losses in pastoral, agricultural, horticultural, ornamental and forestry industries, and cause loss of biodiversity in national parks and nature reserves throughout the country.
The chemical control of Phytophthora a diseases in Australia primarily involves systemic fungicides based on phosphonic acid: the active constituent being the phosphonate (phosphite) anion. The use of phosphite fungicides has had a significant impact on disease control within Australia. Although the mechanism of action of phosphite remains to be clarified, its effectiveness to inhibit growth and sporulation of pathogenic agents motivates the search for a method of determining this anion in biological systems.
In the past, analysis has been achieved by Paper Chromatography (PC), Gas Chromatography (GC) and High Performance Ion Chromatography (BPIC). Most procedures are tedious and costly, HPIC columns degraded rapidly and in many cases are no longer available. The advent of new HPIC resin columns was heralded as the answer to the problematic analysis of biological phosphite extracts, however the current investigation proved this not to be the case.
The current investigation, which. is based on previous research, offers a robust, rapid and long term analytical method for the analysis of biological samples which contain both phosphite and phosphate
"The significance of the GNRH 1 gene polymorphism (rs 6185, rs1812594) in the development of idiopathic hypogonadotropic hypogonadism."
Get PDFThe purpose of the study is to study the significance of the GNRH 1 gene polymorphism (rs 6185, rs1812594) in the development of idiopathic hypogonadotropic hypogonadism in boys and girls
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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