1,720,960 research outputs found
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
Gis-ila: The gis for italian logistics in antarctica
No full textA geographic information system (GIS) is a hardware/software tool which is very effective in collecting, storing, searching, handling, and visualizing geographic data together with their descriptive attributes. Such a tool is very helpful to approach a wide range of situations, including many logistic problems. ENEA, as the agency having the task of implementing the Italian Antarctic Program (PNRA), has decided to use a GIS, in order to increase the efficiency in managing the huge amount of data collected in the course of Italian activity in Antarctica, which counts fifteen expeditions up to now. © 2001 Taylor & Francis Group, LLC
Agro-biodiversità e tracciabilità in Olea europea. Sostenibilità e adattamento dell’agroalimentare al cambiamento climatico
No full textStable isotopes, as ecophysiological markers, can be used to assess the geographical origin of food and to analyze varietal behavior against environmental conditions. Several studies have been conducted to characterize Italian extra-virgin olive oils in terms of isotopic compositions. In this paper two case studies are shown: the first one concerns the variability in responses of different olive varieties to the environmental conditions of a common experimental site; the second case is an analysis of traceability of Italian extra-virgin olive oils over the national scale. In the first case study, relevant correlations have been found among fatty acids and isotopic compositions of C and O (!13C and !18O). In the second case study, the variability of isotopic compositions has been evaluated on a large number of Italian oil samples of known geographical origin, by combining stable isotopes mass spectrometry and spatial analysis techniques. All over the Italian territory, various isotopically homogeneous regions have been found, thus modelling a zonation of expected isotopic signatures. Such a zonation can be addressed to verify the declared geographical provenance of extra-virgin olive oils
A multidisciplinary approach for studying the invasion mechanisms of the alien tree species Ailanthus altissima (Mill.) Swingle
Full text linkAilanthus altissima is a fast growing species, originating in Asia, introduced in Europe for ornamental purposes in the second half of the 18th century. It is currently considered as one of the most invasive woody plant in Europe, so as to be included in the list of invasive alien species of European Union concern. This species shows a strong pioneering character, easily adapting to a wide range of urban, rural and forest ecosystems; it has spread widely in temperate and Mediterranean regions of the world. Winged seeds dispersion, numerous root suckers, as well as adaptability to different soil types and water regimes, have favored the spread of A. altissima, especially in disturbed areas along roads. It also threatens biodiversity through competition, population reduction and habitat modification. Effective management and control of such species is needed to reduce the pressure on ecosystem and limit further spread. Within the frame of the CNR-funded USEit project (Use of operational synergies for the integrated management of invasive alien species in Italy), we used a multidisciplinary approach for investigating A. altissima: we selected several pilot experimental sites across central and southern Italy, with the following aims: i) detecting and mapping the spatial distribution by GIS and remote sensing; ii) investigating the symbiotic relationships between A. altissima and associated mycorrhizae by means of stable isotopes techniques; iii) understanding the role of microbiomes in the Evolution of Increased Competitive Capacity (EICA) of A. altissima by metagenomic sequencing analysis of bacterial and fungal communities colonizing the root system of A. altissima. The original results of this study will be discussed in the frame of the current state of the art of A. altissima mechanisms of invasiveness
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
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