1,720,966 research outputs found
Hyperclassification of remote sensing images
No full textThe usefulness of fuzzy set theory in many natural and social sciences has been long established. In this paper a hypergroupal approach to land cover recognition, through fuzzy structures, is considered
Soil erosion risk map of Montagnone area (central Italy) with factorial scoring methods compared with LANDSAT imagery
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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
Sunn hemp, a tropical legume species, as an alternative bioenergy feedstock in temperate climates
No full textThe agricultural sector is called to take prompt action to find solutions capable of guaranteeing large quantities of lignocellulosic biomass to the increasing bio-energy production demands in a rational and sustainable manner without negatively affecting the food supply. An effective way to do that could be through the development of integrated cropping systems, where promising legume crops could be introduced within crop rotations gaps. The objective of this study was to characterize the agro-physiological performance of sunn hemp (Crotalaria juncea L.), a fast-growing high lignocellulose yielding multipurpose leguminous crop of tropical origin, within a traditional sequential cropping system in a temperate climate. Between 2016 and 2022, field trials dealing with: i) cultivar performance at different harvest times, and ii) soil tillage method, were carried out. It has been shown that sunn hemp, besides its potential positive effects on the soil fertility and regardless the cultivar, can produce acceptable biomass yields (ranging from 2.4 to 13.7 Mg ha−1) in a relatively short time, when sowed under no-tillage conditions and harvested around the full flowering stage (about 90 days after sowing). Some physiological parameters (i.e. photosynthesis and photochemical efficiency processes) corroborated the overall good adaptation and performance of sunn hemp under temperate conditions. This preliminarily dataset indicate that such agronomic practices besides maximizing lignocellulosic biomass production may render logistically feasible the cultivation of sunn hemp within a traditional crop rotation in a temperate climate
Pianificazione territoriale e agricoltura ecocompatibile nel Gran Sasso (Italia Centrale)
No full textDispelling 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
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