1,720,954 research outputs found
Analisi del Paesaggio dell'Alta Valle del Tevere attraverso tecniche di Remote Sensing e GIS
No full textThe research has focused on examining the Alta Valtiberina Toscana's landscape using remote
sensing and GIS in order to recreate the landscape through different historical periods. This has
been done using data from archives and bibliographies. A detailed attention has been given to
defining old paths of river Tevere and of the other courses in the area which has had an influence
in the landscape itself.
The GIS has offered the possibility of consulting data of so different nature and origin (from
cartography to archaeological data, digital elevation model etc etc.) and to make specific analysis
on such data in order to reconstruct the main transformations that involved the area in a period of
time that goes from roman era to today.
Moreover, there has been the chance, very rare in archeology, offered by the Centro di
Geotecnologie, Università degli Studi di Siena, to be able to use a dedicate flight (low fly with high
resolution) with hyperspectral sensors CASI e AHS, which has been a fundamental element in
obtaining precious information on the geomorphological aspects of the area
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
Multitemporal analysis for preservation of obsidian sources from Melka Kunture (Ethiopia): Integration of fieldwork activities, digital aerial photogrammetry and multispectral stereo-IKONOS II analysis
No full textinvestigation tool (Gallo et al., 2009) for the identification of new sites and for the assessment of
landscape changes of wide archaeological areas in Ethiopia.
In the Melka Kunture archaeological sequence, the obsidian exploitation represents a leitmotiv during
the last 1.7 Myr and the first known example of Oldowan utilization (Piperno et al., 2009).
The primary nearest obsidian source, the site of Balchit, 7 km North from Melka Kunture, is a domeflow
dated to 4.37 0.07 Myr (Chernet et al., 1998). Large areas of the Balchit site are covered by
secondary obsidian debris resulting from the erosion of primary sources.
The proximity between primary and secondary Balchit obsidian sources and the high quality of this
raw material, easily available in large quantity, represent a unique condition in the framework of the
Oldowan and Acheulian East African sites (Piperno et al., 2009).
In order to evaluate the human impact on the multitemporal change of obsidian sources, the land use
of the study area, following the CORINE Land Cover Nomenclature, has been classified from aerial photos
and IKONOS II imageries, respectively dated to 1972 and 2006. The accurate positioning of the primary
and secondary sources and their extent have been measured thanks to the multispectral characteristics
and to the high spatial resolution of the available imageries.
Satellite scenes, covering an area of about 100 km2, have been also utilized in stereoscopy for the
creation of the new topographic map, at the scale of 1:10,000, and of the Digital Elevation Model (DEM).
Images orientation has been performed through the use of Rational Polynomial Coefficients (RPC)
which accuracy has been improved by the availability of Ground Control Points (GCPs) properly
measured during a DGPS survey. Then, the images have been orthorectified and radiometrically and
spectrally enhanced in order to favour the recognition of obsidian presence, in respect with ground
observations collected during fieldworks.
Photointerpretation and semi-automatic classification processes of images have been performed with
the support of spectral signatures of obsidian samples recorded by a FieldSpec Pro spectroradiometer,
ranging in the visible-short wave infrared electromagnetic interval (0.4e2.5 mm)
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
- …
