1,721,006 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
Investigating the global prevalence of Cyclospora cayetanensis in water and estimating the risk of cyclosporiasis from imported raspberries in Canada
Get PDFCyclospora cayetanensis is a food- and water- borne parasite that causes cyclosporiasis, an enteric disease, in humans. It is endemic in tropical and subtropical regions, and outside of endemic areas C. cayetanensis has been responsible for many global outbreaks including in Canada. The objectives of this thesis were to estimate the global prevalence of C. cayetanensis in water and to estimate the number of cyclosporiasis cases in Canada from imported raspberries. A systematic review and meta-analysis was conducted on the prevalence of C. cayetanensis in different water sources which estimated a global prevalence of 6.9% (I2 = 84.38%). The second study was a quantitative microbial risk assessment that estimated an average of 370 cases of cyclosporiasis per year in Canada as a result of consuming imported raspberries. This research presents baseline data on the prevalence of C. cayetanensis and introduces a tool to estimate the risk of cyclosporiasis in Canada.Food from ThoughtCanada First Research Excellence Fun
Exploring the dynamics of Middle East respiratory syndrome coronavirus in dromedary camels
No full textMiddle East respiratory syndrome coronavirus (MERS-CoV) is an emerging zoonotic pathogen first reported in 2012. The purpose of this thesis was to explore the dynamics of MERS-CoV in the reservoir dromedary camel population using available data sources and different methodological approaches. First, a scoping review was conducted to summarize the empirical evidence for MERS-CoV in animals in order to map knowledge gaps and to extract data for modeling disease transmission in dromedary camels. Meteorological risks of zoonotic infections were explored using a dataset that approximated MERS cases most likely to represent spillover transmission from camels. A case-crossover study identified associations between primary human MERS cases and preceding weather conditions. Infection dynamics in the reservoir dromedary camel population were explored utilizing field data from a serological survey in Kenya. The force of infection was estimated using age-stratified serological data in a generalized linear model framework. Transmission parameters were explored under different demographic scenarios using an agent-based model. The scoping review identified a number of field studies that estimated MERS-CoV prevalence, as well as laboratory experiments that shed light on the natural history of MERS-CoV infection in dromedary camels. It further identified critical research gaps such as longitudinal studies to improve the understanding of long-term dynamics of MERS-CoV. Some of these gaps were addressed in Chapters three through five of this thesis. The case-crossover analysis demonstrated a statistical association between temperature, humidity, wind speed, and ground visibility, and primary human cases of MERS. Force of infection, an important metric in understanding infection dynamics, was estimated to be higher for camels raised in a pastoralist setting, than for camels raised in a ranching system, possibly reflecting the differences in management and disease risk. Using field seroprevalence estimates, various parameter combinations such as probability of infection, contact rate, and duration of immunity were found to be biologically plausible given the current state of knowledge. Using data from a variety of sources and different analytical methods, this thesis describes insights that can be gained from limited information, while at the same revealing how important field data are for understanding infection dynamics.Natural Sciences and Engineering Research Council of CanadaUniversity of GuelphCanada Research Chair
Exploring different components of disease transmission for Verocytotoxigenic Escherichia coli (VTEC) infections in Ontario, Canada
No full textThe transmission dynamics of human verocytotoxigenic Escherichia coli (VTEC) infections are not well understood. This thesis examines the transmission of VTEC, exploring the role of environmental conditions on the risk of primary infections, and the impact of person to person transmission during outbreaks. The first study explored the effect of environmental factors on VTEC infections in Ontario using case-crossover analyses. While the magnitude and direction of the effect was variable between health units, the findings demonstrate that infections were associated with hydrological conditions. The second study focused on the potential impact of person to person transmission using a mathematical model to describe an outbreak in Ontario. Based on the model results, including public health interventions targeting person-to-person transmission reduced the outbreak size by ~16%. The results from these studies demonstrate that watershed hydrology may be associated with VTEC infections, and that person to person transmission is an important transmission route to target for interventions during outbreaks
- …
