1,721,072 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
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
Rilievi anatomo-clinici e risultati preliminari di diagnosi sperimentale su una malattia emorragica in fagiani di allevamento.
No full textvengono descritte le caratteristiche cliniche ed anatomo-istopatologiche e e riportati i risultati preliminari degli accertamenti diagnostici sperimentali di una malattia comparsa recentemente in fagiani allevati in centri di produzione di selvaggina in Toscana. Si tratta di una patologia ad insorgenza improvvisa caratterizzata da anoressia, difficoltà di movimento, tremori e da uno stato di profonda prostrazione che precede la morte. L' episodio morboso si esaurisce spontaneamente nell' arco di tempo di una settimana con mortalità del 5 - 10 %.
I quadri macroscopici ed istologici sono caratterizzati da lesioni cangestizio-emorragiche a livello muscolare, del timo e di organi e visceri cavitari con particolare interessamento della milza, del fegato e del rene, risultano interessati anche Borsa del Fabrizio e stomaco ghiandolare che appaiono notevolmente aumentati di volume e nei quali la Microscopia elettronica a evidenziato la presenza di particelle virali Enterovirus-like e simili virali di probabile origine enterica
Patologia negli allevamenti avicoli in Guinea equatoriale.
No full textNella Guinea Equatoriale l' avicoltura costituisce un settore di notevole interesse economico-sociale in quanto i prodotti avicoli rappresentano una importante risorsa alimentare per la popolazione.
In diversi allevamenti sono stati effettuati controlli parassitologici, istologici e sierologici, dai quali è emersa la frequenza di malattie parassitarie, ma anche di malattie infettive come la Leucosi, la malattia di Gumboro (IBA) e la Pseudopeste aviare (NDV)
Immunohistochemical Detection of Japanese Encephalitis Virus in AVIAN Myeloid Lineage Cells
Get PDFIntroduction: Between 1997 and 2000, birds (mainly blackbirds and song thrushes) were collected during mortality episodes occurring in a wetland area in Tuscany, where cases of West Nile virus (WNV) infection in horses were observed in 1998.
Materials and Methods: Formalin-fixed tissue samples from 14 birds collected in 1997 and seven collected in 2000 that tested positive for Japanese encephalitis (JE) group antigens by immunohistochemistry (IHC), were sent to the Central Research Institute of Epidemiology in Moscow, to carry out molecular testing for flaviviruses.
Results: None of the samples tested positive for WNV, but PCR amplicons of the JE virus NS5 gene and the JEV E gene were obtained from tissues of seven birds. Sequencing of 552 bp fragments of the JEV E gene (GenBank AF501311-AF501315) and of NS5 amplicons showed high similarity (99%) with JEV genotype III (Nakayama strain). IHC for JEV (pAb, PG 10004) was positive in 13 of 21 bone marrow samples, with stem cells positive also for CD11b (pAb, ab75476). Positive reactions were also present in neurons, microglial cells, kidney, spleen, liver, lung and gastrointestinal tract ganglia.
Conclusions: This is the first description of JEV localization in myeloid lineage cells of avian bone marrow, a possible important reservoir for this virus
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