1,720,982 research outputs found
Taking up the legacy of Waterhouse Hawkins and Owen. Art and science for a new Italian project to bring back dinosaurs to life
No full textSince their initial formal recognition by Richard Owen in 1842, dinosaurs have always stood out in the
collective imagination for their size and unusual appearance. Therefore, these marvellous animals
are a source of curiosity and wonder for people of all ages, social and cultural backgrounds. Thanks to
improved research techniques, palaeontologists have been able to work reconstructing the most plausible
appearance of dinosaurs. Starting with petrified bones, they tried to make a dream come true – to bring
the planet’s ancient inhabitants back to life. The new Italian exhibition Dinosaurs in the Flesh: Science and
Art bring the Rulers of a Lost World Back to Life reveals the marriage of science and art that brings back to
life animals that lived tens or hundreds of millions of years ago. Palaeontologists and artists collaborate on
reconstructing the appearance of organisms from the distant past through study of the fossils, often with
the aid of new technologies. The new project, which takes up the idea of Waterhouse Hawkins and Owen
and their legacy to restore these ancient vertebrates based on solid scientific foundations, represents to
date the only way to reanimate these fascinating lost animals
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
An exquisite specimen of Edingerella madagascariensis (Temnospondyli) from the Lower Triassic of NW Madagascar; cranial anatomy, phylogeny and restorations
No full textNew material of Alierasaurus ronchii (Synapsida, Caseidae) from the Permian of Sardinia (Italy), and its phylogenetic affinities
Get PDFNew characters of the giant caseid Alierasaurus ronchii are described here based
on material recovered from the type locality in the Permian deposits of Cala del Vino
Formation (Sardinia NW) and additional preparation of the previously collected material.
All new described osteological elements are characterized by the same state of
preservation and, given the absence of double elements and the total compatibility in
absolute size, the new material can be attributed without doubt to the holotypic individual
of A. ronchii. Highly diagnostic material includes a caudal neural spine with a broad
bifid distal termination. This represents a synapomorphy characterizing the more
derived caseids, thus fully confirming the attribution of the Sardinian specimen to
Caseidae. Also the other vertebral material and newly collected ribs show a typical
caseid structure, fully consistent with the previously published material. Despite the
highly partial nature of Alierasaurus, the taxon was included in a recent phylogenetic
analysis of caseids to investigate its phylogenetic position within the monophyletic
Caseasauria. Alierasaurus falls as the sister taxon of Cotylorhynchus, and is autapomorphic
in the general construction of MT-IV and proximal phalanx IV-I. The absolute
size of the newly recovered material confirms a gigantic body size for Alierasaurus,
comparable, if not greater, to that of the huge North American species Cotylorhynchus
hancocki (up to 6 m in length). Such gigantic adult body size, closely correlated to its
herbivorous lifestyle, must have been selected during evolution of caseids, leading to
substantial advantages in terms of fitness
New information on the abelisaurid pedal elements from the Late Cretaceous of NW Madagascar (Mahajanga Basin).
No full text- …
