1,721,086 research outputs found
Using software-based acoustic detection and supporting tools to enable large-scale environmental monitoring
No full textAcoustic monitoring tools are often constrained to small-scale, short-term studies due to high energy consumption, limited storage, and high equipment costs. To broaden the scope of monitoring projects, affordability, energy efficiency, and space efficiency must be improved on such tools. This thesis describes efforts to empower researchers charged with monitoring ecosystems, faced with the challenges of limited budgets and cryptic targeted events. To this end AudioMoth was developed: a low-cost, open-source acoustic monitoring device which has been widely adopted by the conservation community, with over 6,600 devices sold as of August 2019.This thesis covers the development and deployment of three acoustic detection algorithms that reduce the power and storage requirements of acoustic monitoring. The algorithms aim to detect bat echolocation, to search for evidence of a endangered cicada species, and to collect evidence of poaching in a protected nature reserve. Each algorithm addresses a detection task of increasing complexity - analysing samples multiple times to prevent missed events, implementing extra analytical steps to account for environmental conditions such as wind, and incorporating a hidden Markov model for sample classification in both the time and frequency domain. For each algorithm this thesis reports on their detection accuracy as well as real-world deployments carried out with partner organisations. The deployments demonstrate how acoustic detection algorithms extend the use of low-cost, open-source hardware and facilitate a new avenue for conservation researchers to perform large-scale monitoring.The research also covers an analysis of the accessibility of acoustic monitoring technology, focusing on AudioMoth and its supporting software. This is done using a 75-respondent questionnaire and a thematic analysis done on a series of interviews. The results of both analyses discovered a number of potential methods for improving acoustic monitoring technology in terms of the various forms of accessibility (financial, usability, etc.). The community responses, along with the popularity of AudioMoth and the success of the deployed detection algorithms demonstrate the benefits of providing accessible acoustic monitoring solutions to conservationists
AudioMoth Software
No full textSoftware used in conjunction with AudioMoth hardware and the configuration app. Data files are are hosted on github.com, with a closed copy archived within the university.
The research was funded through:
EPSRC Studentship (1658469) to A. Hill
Natural Environmental Research Council SPITFIRE DTP award (NE/L002531/1) to P. Prince
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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