1,720,954 research outputs found
DTM segmentation and analysis for archaeological hill-top sites recognition in GRASS
No full textThis paper presents a procedure for the automatic creation of a map of probable location of archeological hill-top sites, i. e. sites on dominant positions with respect to surrounding areas, from a digital terrain model.
These areas are detected by combining segmentation techniques and morphological filtering.
The application of a segmentation technique to the DTM creates two maps showing respectively homogenous areas and discontinuities, according to some criteria. The following application of filtering to the homogenous areas selects
areas with a suitable combination of minimum surface, maximum value of compactness and maximum mean curvature.
The result of the procedure is a map of candidate hill-top sites, which is used by archeologists for further analysis.
Besides the specific application, this study provides an example of the usage of the GRASS r.seg modules with indication about the choice of suitable values for the required parameters.
The study has been carried out on the whole Provincia Autonoma di Trento (north east Italy)
MULTISCALE DOCUMENTATION AND MONITORING OF L’AQUILA HISTORICAL CENTRE USING UAV PHOTOGRAMMETRY
Get PDFNowadays geomatic techniques can guarantee not only a precise and accurate survey for the documentation of our historical heritage
but also a solution to monitor its behaviour over time after, for example, a catastrophic event (earthquakes, landslides, ecc). Europe
is trying to move towards harmonized actions to store information on cultural heritage (MIBAC with the ICCS forms, English
heritage with the MIDAS scheme, etc) but it would be important to provide standardized methods in order to perform measuring
operations to collect certified metric data. The final result could be a database to support the entire management of the cultural
heritage and also a checklist of “what to do” and “when to do it”. The wide range of geomatic techniques provides many solutions to
acquire, to organize and to manage data at a multiscale level: high resolution satellite images can provide information in a short time
during the “early emergency” while UAV photogrammetry and laser scanning can provide digital high resolution 3D models of
buildings, ortophotos of roofs and facades and so on. This paper presents some multiscale survey case studies using UAV
photogrammetry: from a minor historical village (Aielli) to the centre of L’Aquila (Santa Maria di Collemaggio Church) from the
post-emergency to now. This choice has been taken not only to present how geomatics is an effective science for modelling but also
to present a complete and reliable way to perform conservation and/or restoration through precise monitoring techniques, as shown
in the third case study
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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