1,720,995 research outputs found
I microfossili dei calanchi nelle Argille Azzurre della Romagna occidentale: una chiave per lo studio degli ambienti e del clima del passato
No full textThe Late Early Pleistocene Flora Of Oriolo, Faenza (Italy): Assembly Of The Modern Forest Biome
No full textDenk, Thomas, Sami, Marco, Teodoridis, Vasilis, Martinetto, Edoardo (2022): The Late Early Pleistocene Flora Of Oriolo, Faenza (Italy): Assembly Of The Modern Forest Biome. Fossil Imprint 78 (1): 217-262, DOI: 10.37520/fi.2022.009, URL: http://dx.doi.org/10.37520/fi.2022.00
La "selce dei Crivellari": appunti sulla silice (calcedonio, selce e quarzo) nella Vena del Gesso romagnola
No full textL’articolo prende spunto dalla caratteristica selce affiorante a nord est di M. Tondo (presso il borghetto dei Crivellari) per fare il punto delle conoscenzesulle manifestazioni silicee nella Vena del Gesso romagnola, evidenziandone sia la distribuzione disomogenea che la complessità mineralogica. I principali litotipi descritti sono: calcedonio grigio (“selce dei Crivellari”), selce in calcare, selce laminata, quarzo dendritico e legno silicizzato.
Si ritiene che l’ipotesi geochimica esposta da FORTI (1994) per spiegare la genesi a bassa temperatura del quarzo dendritico nella Grotta “Azzali” (Gessi di M. Mauro) fornisca un’utile chiave interpretativa anche per le altre manifestazioni silicee rilevate. Si suggerisce inoltre che la localizzazione della silice, riscontrata esclusivamente nella porzione centro-orientale della Vena del Gesso, sia probabilmente legata al particolare assetto geometrico/strutturale che la dorsale manifesta in tale settore.
Abstract
This article illustrates the characteristic chert outcropping northeast of Mt. Tondo (near the Crivellari hamlet) and discusses the various siliceous rocks formed within the gypsum evaporites of the “Vena del Gesso”(Romagna, Northern Apennines, Italy) highlighting their occurrence and mineralogical complexity. The main rock types described are: grey chalcedony (“Crivellari chert”), chert in limestone, laminated chert, dendritic quartz and silicified wood.
We suggests that the geochemical hypothesis proposed by FORTI (1994) to explain the origin of the low-temperature dendritic quartz of the “Azzali Cave” (near M. Mauro) provides a useful interpretative key also forthe other siliceous lithotype. We also suggest that exclusive occurrence of the silica in the central-eastern portion of the studied area the , is probably related to the particular geometrical/structural arrangement of the Vena del Gesso ridge
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
Retiskenea Waren & Bouchet 2001
No full textGenus <i>Retiskenea</i> Warén & Bouchet, 2001 Type species <p> <i>Retiskenea diploura</i> Warén & Bouchet, 2001, by original designation.</p>Published as part of <i>Kiel, Steffen, Sami, Marco & Taviani, Marco, 2023, Mollusks (Gastropoda, Bivalvia) from Miocene cold-seep deposits in northern Italy: revisions and additions, pp. 115-160 in European Journal of Taxonomy 910</i> on page 128, DOI: 10.5852/ejt.2023.910.2365, <a href="http://zenodo.org/record/10350702">http://zenodo.org/record/10350702</a>
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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