1,720,959 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
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Mycotoxin levels in subsistence farming systems in South Africa
Full text linkThesis (MScAgric (Plant Pathology)--Stellenbosch University, 2008.
Includes bibliography.summary,list of figures and appendices.ENGLISH ABSTRACT:
Fusarium spp. and Aspergillus spp. are toxin-producing fungi associated with maize and
groundnut. Fusarium verticillioides produces fumonisins in maize, and Aspergillus flavus
produces aflatoxins in maize and groundnut kernels. Both toxins are responsible for
carcinogenesis in humans and animals. Contamination of maize and groundnut with
mycotoxins is often most severe in rural areas where subsistence farmers are unaware of their
existence and follow agricultural practices that might contribute to their production. A
questionnaire was, therefore, compiled to investigate agricultural decisions in rural areas that
may influence mycotoxin contamination of crops. During 2006 and 2007, maize and
groundnut samples were collected in the Eastern Cape, KwaZulu-Natal (KZN), Limpopo, and
Mpumalanga provinces. Mycotoxin levels were quantified using the ELISA technique, and
the incidence of Fusarium spp. in maize grain was determined by plating maize kernels out on
Fusarium selective medium. Fumonisin-producing Fusarium spp. were also quantified using
real-time PCR (TaqMan). The incidence of A. flavus and A. parasiticus in groundnut was
determined by plating out kernels on potato dextrose agar. Fumonisin contamination levels in
maize samples ranged from 0-21.8 parts per million (ppm) and aflatoxin levels ranged from 0-
49 parts per billion (ppb), depending on the region where samples were collected. Aflatoxin
levels in groundnut ranged from 0-160.1 ppb. Fusarium verticillioides was the most common
Fusarium sp. in maize followed by F. subglutinans and F. proliferatum, respectively.
Regression analyses showed a positive correlation between fumonisin-producing Fusarium
species when determined by real-time PCR and fumonisin concentration (r2=0.866).
Regression analyses further showed a highly significant positive correlation between A. flavus
and aflatoxin contamination (r2=0.10235). Samples from northern KZN contained levels of
mycotoxins that were far in excess of the maximum levels set by the Food and Drug
Administration in the USA. In South Africa there are currently no regulations with regard to
the maximum allowable levels of fumonisin in human food. The high incidence of mycotoxin
contamination of human food in subsistence farming systems indicates the need for awareness
programmes and further research.AFRIKAANSE OPSOMMING:
Fusarium spp. en Aspergillus spp. is toksien-produserende fungi wat met mielies en
grondbone geassosieer word. Fusarium verticillioides produseer fumonisiene in mielies,
terwyl, A. flavus aflatoksiene in mielies en grondbone produseer. Beide toksiene is
karsinogenies vir mens en dier. Die vlakke van toksien-kontaminasie is meestal die ergste in
landelike gebiede waar bestaansboere onbewus is daarvan. Landboupraktyke wat deur die
boere toegepas word vererger dikwels die probleem. ‘n Vraelys is saamgestel om vas te stel
watter landboupraktyke in landelike gebiede toegepas word, en hoe dit toksien-kontaminasie
in mielies en grondbone beinvloed. In die 2006 en 2007 seisoene is mielie- en
grondboonmonsters in Kwa-Zulu-Natal (KZN), die Oos Kaap, Limpopo en die Mpumalanga
provinsie versamel. Toksien-vlakke is gekwantifiseer deur gebruik te maak van die ELISA
tegniek. Die insidensie van Fusarium spp. in mielies was bepaal deur pitte op Fusariumselektiewe
agar uit te plaat. Fumonisien-produserende Fusarium spp. was ook gekwantifiseer
deur van kwantitatiewe PCR (TaqMan) gebruik te maak. Die voorkoms van A. flavus en A.
parasiticus is bepaal deurdat mielie- en grondboonpitte op aartappel dekstrose agar uit te
plaat. Fumonisien-vlakke in die mieliemonsters het gewissel van 0-21.8 dele per miljoen
(dpm), terwyl aflatoksienvlakke gewissel het van 0-49 dele per biljoen (dpb), afhangende van
die omgewing waar monsters versamel is. Aflatoksien vlakke in die grondboonmonsters het
gewissel van 0-160.1 dpb. Fusarium verticillioides is die meeste vanuit mielies geisoleer,
gevolg deur F. subglutinans en F. proliferatum. Regressie analises het ‘n positiewe korrelasie
tussen fumonisien konsentrasie en fumonisien-produserende spp. aangedui waar daar gebruik
gemaak is van die kwantitatiewe PCR (r2= 0.866). Regressie analises het ‘n hoogs
betekenisvolle positiewe korrelasie getoon tussen A. flavus en aflatoksien kontaminasie
(r2=0.10). Monsters van noordelike KZN het toksienvlakke bevat ver bokant die maksimum
toelaatbare vlakke is soos bepaal deur die Food en Drug Administrasie in die Verenigde State
van Amerika. Daar is tans geen regulasies in Suid Afrika wat die maksimum toelaatbare
vlakke van fumonisiene in voedsel vir menslike gebruik bepaal nie. Die hoë voorkoms van
mikotoksien-kontaminasie in bestaansboer-sisteme, dui die belangrikheid van verdere
navorsing en bewusmakings-progamme aan.Master
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