1,721,180 research outputs found
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
Archeozoologia e paleobotanica dell’insediamento protostorico del Borgo di Vejano (VT)
No full texta cura di N. Negroni Batacchio, Centro Studi di Preistoria e Archeologia Milan
Bisphenols A and its analogues induce genotoxic damage in marine and freshwater amphipods
Get PDFAmong plastic additives, bisphenol A (BPA), used mainly in manufacturing objects of everyday use, has received considerable attention for acting as a xenoestrogen and causing endocrine disruption. We now observe its rapid replacement with analogue compounds with similar structures (BPs) whose safety is not fully demonstrated. The present paper investigates the possible adverse effects of BPA, BPF, and BPS on DNA integrity of two gammarid species, Echinogammarus veneris and Gammarus aequicauda, to assess the environmental risk posed by these compounds in the aquatic ecosystem. Moreover, we analysed the cell-specific sensitivity to BPs using somatic (hemocytes) and germ (spermatozoa) cells that could have wide-ranging implications for their reproductive biology and long-term adverse effects at the population level. Results demonstrate that BPA and its analogues caused a genotoxic impact and highlighted lower genotoxic damage induced in sperm cells in both species tested. The implications of the findings of this study on the aquatic ecosystem are discussed, taking into account the critical role of amphipods within the freshwater trophic chain
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
Avanced modeling for the control of tunnel ventilation during excavation and operation
No full textInnovative tools are necessar y to obtain the optimal operating conditions of the ventilation systems in a reasonable lapse of time and accurately. This can be achieved both with appropriate numerical approaches to the full domain as the model order reduction techniques and with the domain decompositions methods as the multi-scale physical decomposition technique. The reduced order mode techniques such as the Proper Orthogonal Decomposition - POD are based on the snapshots method, which provides an optimal linear basis for the reconstruction of multidimensional data. The physical decomposition achieved through mul-ti-level approaches uses the accuracy of the Computational Fluid Dynamics - CFD code in the near field, e.g. the region close to the fire source, and takes advantage of the low computational cost of the 1-D model in the region where gradients in the transversal direction are negligible. In this paper, the features of these two approaches when applied to the control of tunnel ventilation systems are presented. In particular, the use during construction the phase and during operation are discussed
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
Spatial design. Experiences and experiments of urban regeneration for a possible taxonomy
No full textIl ruolo giocato dalla cultura del Design nell’ambito del progetto dello spazio pubblico,si è evoluto nel tempo. Nell’ambito dell’Architettura, negli anni ’90 del secolo scorso,si apre un dibattito internazionale che incoraggia un processo di revisione dei metodidi formazione fino ad allora adottati a favore di nuovi in grado di mettere al centrol’uomo, il vero fruitore di oggetti, spazi e architetture. Ne emerge la possibilità di ab-battere alcuni confini disciplinari a favore di una transdisciplina, Design di Spazi e Ar-chitetture. Lo Spatial Design rimette in discussione molti degli assunti dell’Urbanisticae dell’Architettura del secolo breve, a partire proprio dal rapporto dello Spazio con ilfruitore. Attraverso recenti casi studio, il saggio propone un’embrionale tassonomiadello Spazio pubblico, basandosi sul principio scientifico della ricorrenza di alcunesoluzioni progettuali.The role played by the culture of Design in the context of the planning of public space has evolved over time. In the sphere of Architecture, the 1990s saw the opening of an international debate that encouraged a process of revising the training methods adopted until that time, in favour of new ones capable of placing people – the true users of objects, spaces, and architectures – at the centre. This raised the possibility of breaking down certain disciplinary boundaries in favour of a transdiscipline, the Design of Spaces and Architectures. Spatial Design calls back into question many of the assumptions of the Urban Planning and Architecture of the short century, starting precisely from the relationship between Space and the user. Through recent case studies, this essay proposes an embryonic taxonomy of public space, basing its perspective upon the scientific principle of the recurrence of certain design solutions
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
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