1,720,989 research outputs found
Preliminary report on landscape pattern analysis – State of the art. BIO SOS Biodiversity Multisource Monitoring System: from Space TO Species (BIO SOS) Deliverable D6.2, pp41 http://www.biosos.wur.nl/UK/Deliverables/
No full textThe state of the art on the methodologies for assessing fragmentation
and connectivity have been delineated and the scope of the BIO_SOS
research on these issues brought into contex
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
Using landscape structure to develop quantitative baselines for protected area monitoring
No full textChanges in habitat extent as well as landscape and habitat structure are often caused by human pressure
within protected areas and at their boundaries, with consequences for biodiversity and species
distributions. Thus quantitative spatial information on landscape mosaic arrangements is essential, for
monitoring for nature conservation, as also specified by frameworks such as the Convention on Biological
Diversity (CBD), and the European Union’s Habitat Directive. While measuring habitat extent is a relatively
straightforward task, approaches for measuring habitat fragmentation are debated. This research aims
to delineate a framework that enables the integration of different approaches to select a set of site- and
scale-specific indices and synthetic descriptors and develop a comprehensive quantitative assessment of
variations in human impact on the landscape, through assessment of habitat spatial patterns, which can
be used as a baseline for monitoring. This framework is based on the use of established methodologies
and free software, and can thus be widely applied across sites. For each landscape and observation scale,
the framework permits the identification of the most relevant indices, and appropriate parameters for
their computation. We illustrate the use of this framework through a case study in a protected area in
Italy, to indicate that integrated information from multiple approaches can provide a more complete
understanding of landscape and habitat spatial pattern, especially related to locations experiencing disturbance
and pressure. First, identification of a parsimonious set of traditional LPIs for a specific landscape
and spatial scale provides insights on the relation between landscape heterogeneity and habitat fragmentation.
These can be used for both change assessment and ranking of different sections of the study area
according to a fragmentation gradient in relation to matrix quality. Second, morphological spatial pattern
analysis (MSPA), provides a pixel based structural characterisation of the landscape. Third, compositional
characterisation of the landscape at the pixel level is provided by landscape mosaic analysis. These three
approaches provide quantitative assessments through indices which can be used singly or in combination
to derive three synthetic descriptors for a comprehensive quantitative baseline representation of landscape
structure that can be used for monitoring: the first descriptor, landscape diversity profiling, based
on the output of landscape mosaic analysis, at the landscape level, complements the evaluation which at
the pixel level can be obtained by more complex modelling; the second descriptor, obtained combining of
the outputs of MSPA and the landscape mosaic analysis, informs on the local structural pattern gradient
across the landscape space; the third descriptor, derived from the integration of selected LPIs and those
derived from MSPA into a discontinuities detection procedure, allows for the identification of “critical
points” of transitions in management where threats to biodiversity and ecosystems integrity may be
likely. The framework developed has significant potential to capture information on major landscape
structural features, identify problematic areas of increased fragmentation that can be used to prioritise
research, monitoring and intervention, and provide early warning signals for immediate response to
pressures increasing habitat fragmentation, with the goal of facilitating more effective management
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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