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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
Infezione da TSWV in Alstroemeria spp. in Liguria Maria Grazia Bellardi, Lisa Cavicchi, Giorgio Bozzano, Mario Mattone, Giuseppe Parrella
No full textI Tospovirus (famiglia Bunyaviridae) costituiscono un gruppo di virus estremamente pericolosi in tutto il mondo, il cui capostipite (TSWV: virus dell’avvizzimento maculato del pomodoro) è purtroppo assai noto ai coltivatori liguri (e non solo) di orticole, aromatiche ed ornamentali.
Di TSWV (e di INSV, virus della maculatura necrotica dell’impatiens) ci siamo ampiamente occupati in questi ultimi anni; basti citare le recenti segnalazioni su specie ornamentali (Iberis semperflorens, Lupinus spp., Stephanotis floribunda, Arctotis x hybrida, ciclamino, calla bianca, ecc.) caratterizzate da gravi sintomatologie che hanno compromesso la produttività degli impianti.
TSWV e INSV non rappresentano però le uniche specie di Tospovirus note: fino ad oggi nel mondo ne sono state descritte almeno 19, fra cui IYSV (virus della maculatura gialla dell’iris) presente in Italia su cipolla da seme.
In questa breve nota ci occupiamo di una rizomatosa, Alstroemeria spp., segnalata nel 1992 in Italia ospite naturale di TSWV: le piante, cresciute in una serra ligure, manifestavano anulature e maculature gialle sulle foglie, e producevano un numero limitato di fiori. Da allora non si sono registrate ulteriori segnalazioni su questa ornamentale, fino al mese di aprile del 2015 quando, in una serra della Piana di Albenga (Savona) su due piante di una varietà “nana” (proveniente dall’Olanda) sono stati osservati sintomi attribuibili a TSWV.
Prendiamo spunto da questo recente caso per parlare degli altri Tospovirus presenti in Europa e del costante pericolo di una loro introduzione nel nostro Paese mediante materiale di propagazione già infetto o contaminato da tripidi viruliferi.
Le due piante oggetto di studio, cresciute in vaso, sono state inviate al DipSA (Università di Bologna) nel febbraio del 2015. I sintomi consistevano in anulature più o meno ampie, bianche o giallastre, sulle foglie e/o “variegatura” del lembo fogliare. Nel mese di marzo, si è assistito alla produzione dei boccioli: i fiori, di colore rosso porpora, sono apparsi nomali come forma e dimensione.
Questa breve indagine conferma Alstroemeria spp. ospite naturale di TSWV in Italia. Nel 1992 (anno del primo ritrovamento) l’identificazione era stata ottenuta unicamente grazie all’applicazione di tecniche sierologiche (immunodiffusione in gel di agar), mentre oggi sono state utilizzate quelle ben più sensibili di biologia molecolare.
La sintomatologia di allora solo in parte è simile a quella osservata sulle due piante oggetto di studio; un “punto” in comune è il non coinvolgimento dei fiori.
Una volta esclusa fortunatamente l’introduzione nel nostro Paese del “nuovo” Tospovirus ANSV, resta il dubbio se TSWV fosse già presente nel materiale di propagazione importato o se l’infezione sia stata contratta durante la crescita nella serra ligure, trasmessa da tripidi vettori. Considerando che non si sono notati altri esemplari infetti, si è più propensi verso la prima ipotesi. Ciò significa che, quando si tratta di Tospovirus non bisogna mai abbassare la guardia e che, anche quando gli effetti negativi dell’infezione sulla produzione appaiono molti contenuti (come nel nostro caso), occorre comunque rivolgersi a Laboratori di analisi specializzati nella diagnosi di fitovirus
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
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
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