1,721,128 research outputs found
Dario Graffi e la sua influenza sulla Fisica Matematica
No full textQuesto articolo fa una rassegna dei pricipali settori in cui il Professor Dario Graffi ha dato notevoli contributi all fisica Matematica, e nei quali la sua influenza ha portato a ulteriori sviluppi
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
The “Continental Intercalaire” of southern Tunisia: stratigraphy, paleontology, and paleoecology
No full textThe ‘‘Continental Intercalaire’’ deposits of southern Tunisia preserve one of the most diverse Early Cretaceous
vertebrate fauna from Africa, consisting of elasmobranchs, actinopterygians, sarcopterygians, turtles,
crocodyliforms, pterosaurs, and non-avian dinosaurs. Vertebrate remains representative of both
marine and fluvial environments have been historically referred to a specific bonebed within the Chenini
Member, which crops out extensively in the Tataouine region. A stratigraphic revision of the mainly siliciclastic
deposits of the Douiret and the Aïn El Guettar formations in the area based on new sedimentological
and paleontological data is presented. Data collected indicate the presence of multiple fossil-bearing
strata encompassing the stratigraphic interval from the Berriasian to the Albian and document faunal
variation through time as well as major environmental and climatic changes. Detailed sedimentological
analysis combined with biostratigraphic correlation performed at a basin scale indicate lateral facies variability
within each formation as a result of tectonically and climatically driven zonations within the
Tataouine Basin in the Early Cretaceous. Furthermore, proposed stratigraphic correlations indicate that
vertebrate remains previously referred to the fluvial Chenini Member (and in particular theropod and
sauropod dinosaurs) are instead representative of a transgressive deposit which mark the base of the
overlying Oum ed Diab Member
[Personal experiences of immunotherapy using the transfer factor].
No full textSix subjects, four suffering from chronic mucocutaneous candidosis, one from ataxiatelangiectasia and one from partial combined immunological deficiency with ongoing pulmonary tuberculosis, were treated with transfer factor. The deficient immunological situation normalized in all subjects after treatment. Clinically, all showed improvement excepting one candidosis case
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
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
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