1,720,983 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
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
Infections associated with reproductive disorders in cattle in Tanzania : occurrence, characterization and impact
Get PDFThe livestock sector in Tanzania is huge in animal numbers but the production is disproportionally small. Most of the infections known to cause reproductive disorders are generally regarded endemic in Africa, but more specific information is lacking. The overall aim of the study was therefore to investigate the occurrence, characteristics, and impact of selected infections causing reproductive disorders in cattle in Tanzania.
A cross-sectional study was performed in two locations in Njombe and Mbeya regions in the southern highlands of Tanzania. In total, 202 cattle herds were visited once, and relevant information and biodata were collected through direct observation and interview of farmers. Biomaterials from 658 animals were collected for laboratory analysis.
The most common reproductive disorders encountered in the area were abortion (11.3%) and retained placenta (17.2%) (Paper 1). Antibodies specific to bovine viral diarrhoea virus (BVDV) were found in 15.2% of the animals in 17.9% of the herds, and antibodies to Brucella spp. in 5.4% of the animals in 7.4% of the herds. Herd level seroprevalence varied considerably between the two locations, from 6.5% to 66.7% for BVDV and from 0.6% to 36.1% for Brucella spp. A regression model identified large herds (odds ratio (OR): 14.5), location (OR: 23.1) and grazing (OR: 22.7) as risk factors for Brucella seropositivity and location (OR: 12.7) as risk factor for BVDV seropositivity at herd level. Brucella (OR: 15.5) and BVDV (OR: 5.0) seropositivity was associated with abortion at herd level. N. caninum-specific antibodies were found in 4.5% of animals and in 8.4% of the herds but no associations with reproductive disorders nor risk factors were found.
Brucellosis was further studied in one of the herds, which was experiencing abortions (Paper 2). The within-herd seroprevalence in cattle (n = 200) was 48% (95% CI 41-55), using an indirect antibody ELISA. Three Brucella isolates were cultured from an aborted foetus and associated foetal membranes. A multiplex PCR (Bruce-ladder), 16s rDNA gene sequencing and classical biotyping classified the isolates as B. abortus biovar 3. A multiple locus variable number of tandem repeats analysis (MLVA-16) revealed two different but closely related genotypes. High within-herd prevalence, isolation of the pathogen, and abortion confirm that B. abortus is circulating in this herd with cattle as reservoir hosts.
In Paper 3, sera from all cattle were analyzed using an antibody ELISA kit for Schmallenberg virus (SBV), and 61% were positive. SBV virus neutralization test (VNT) was then performed on 110 sera collected, of which 51 % were positive. Additional sera from the same area collected in 2008/2009were then included and 54.6% were positive in the antibody ELISA while 21% were positive in the VNT.45 ELISA positive sera were further analysed in VNTs for the related viruses Akabane, Douglas, Peaton, Sabo, SBV, Sathuperi, Shamonda, Aino, Tinaroo and Simbu viruses. Antibodies to all except Simbu virus were detected. For SBV, 29 sera (64.4%) were positive. These results indicate that SBV or a closely related virus was present in Tanzania before the European epidemic, however, cross-reactivity complicates the interpretation of serological studies.
Overall, the study shows that the selected infections represent both animal and human health risks in the study area. Two new genotypes of B. abortus that are not related to other African strains and antibodies to eight new Simbu serogroup viruses in Tanzania, of which four are also new to Africa, were found. The highly variable prevalence and impact of Brucella spp. and BVDV infections between geographically closely related locations require awareness. Animal contact represents a serious risk of introducing infections to infection-free sub-populations, and changes in management factors might alter conditions for spread and survival within the subgroups. Unpasteurised milk is commonly consumed in the area which underscores the need for strategic ‘One health’ control measures.Antall storfe i Tanzania er høyt, men produksjonen hos hvert enkelt dyr er lav. Mange infeksjoner som gir reproduksjonsproblemer hos storferegnes å være endemisk i Afrika, men det mangler mer detaljert kunnskap. Målet med studien var derfor å identifisere og karakterisere slike smittestoff samt undersøkederes forekomst og betydning for reproduksjonsproblemer hos storfe i Tanzania.Norwegian Ministry of foreign affair
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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