1,720,957 research outputs found
Freshwater Biodiversity of the Eastern Highlands of Zimbabwe: Assessing Conservation Priorities Using Primary Species-Occurrence Data
No full textThe Eastern Highlands of Zimbabwe is a biodiversity hotspot that forms part of the Eastern Afromontane region, which has seen an increase in human activities such as agriculture, illegal mining, and introduction of invasive species. These anthropogenic activities have had negative environmental consequences including land degradation and water pollution, which have negatively impacted on the quality of aquatic habitats and biodiversity in the region. The region harbours several freshwater species of conservation interest whose numbers and distribution are little known. We also do not know the impacts of the ongoing human activities and threats on the local wetland biodiversity and the integrity of the ecosystem in the region. The relevant data on the wetland biodiversity from previous studies and surveys is also not readiliy available to guide poliies and conservation efforts in this region.
With the aid of the Biodiversity Information for Development (BID) program sponsored by the Global Biodiversity Information Facility (GBIF) and the European Union (EU), a project titled 'Freshwater Biodiversity of the Eastern Highlands of Zimbabwe: Assessing Conservation Priorities Using Primary Species-Occurrence Data' has mobilized and digitized over 2,000 occurrence records on freshwater biodiversity, with a focus on fish, invertebrates, amphibians and bird species in the region, since October 2017. The project also makes use of biodiversity informatics tools such as ecological niche modelling, to identify the important sites for conservation of the freshwater biodiversity in this region. The outputs will help to show policy makers, wildlife managers, researchers and conservationists where to target resources and conservation efforts. This will also help protect the biodiversity that still existsin the unprotected wetlands of the Eastern Highlands of Zimbabwe and that could be lost to human activities such as clearing for agriculture
Dragonfly (Odonata) community structure in the Eastern Highlands Biodiversity Hotspot of Zimbabwe: potential threats of land use changes on freshwater invertebrates
No full textWe examined the diversity and potential drivers of dragonfly distribution in a biodiversity hotspot of Southern Africa (Eastern Highlands, Zimbabwe) by surveying 30 sites (13 lentic and 17 lotic habitats) located within this region. Additionally, we identified the anthropogenic factors that may threaten Odonata diversity and abundance
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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