1,720,957 research outputs found
La steppa-taiga a mammut e rinoceronti lanosi di Settepolesini - Il popolamento faunistivco e gli ambienti di pianura durante l’Ultimo Glaciale.
No full textViene descritta la fauna a grandi mammiferi del giacimento di Settepolesini di Bondeno. Vengono forniti i risultati delle datazioni radiometriche eseguite sul collagene delle ossa fossili di alcuni reperti e vengono esposte le prime ricostruzioni delle associazioni faunistiche della Pianura Padana durante il Pleistocene superiore e l'Olocene
Settepolesini di Bondeno (Ferrara - Eastern Po Valley) the first example of mammoth steppe in Italy.
No full textA ste of the eastern Po valley (Settepolesini di Bondeno, Ferrara), containing very abundant fauna from the Middle Wurmian, Late Glacial and Holocene (Roman Age) is reported. The oldest faunal association portrays, for the first time in Italy, a mammoth steppe with Mammuthus primigenius, Coelodonta antiquitatis, Megaloceros giganteus, Bison priscus, alces alces, etc. The Late Glacial association provides evidence of a steppe dominated by bison. Radiometric datings are presented
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
I depositi epigravettiani del sito 1 di Cava Romita: cronologia, faune, industria litica.
No full textAppropriate 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
I depositi epigravettiani del sito 1 di Cava Romita: cronologia, faune, industria litica.
No full textGravemente danneggiati da lavori di sbancamento e da attività estrattive, i depositi paleolitici appartenenti in origine ad un vasto insediamento collocato alla base di una parete rocciosa, furono oggetto di scavi di recupero nel 1978 e nel 1979 e sono attualmente in corso di studio. Il quadro paleoecologico desunto dai pochi resti di macromammiferi si accorda con un momento temperato-freddo del tardiglaciale (confermato dalla data 14C di 10350±60 B.P. per l’insieme stratigrafico D1-2) e riflette la varietà di ambienti circostanti il sito. Il quadro viene confermato ed arricchito dal diagramma malacologico, che mostra un trend da condizioni climatiche fresco-aride con copertura arbustiva più o meno rada proprie del tardiglaciale-Olocene iniziale, a condizioni climatiche temperate e temperato-calde ed umide con aree boschive più o meno aperte riferibili all’Olocene.
L’industria litica, particolarmente abbondante in alcuni livelli, attesta la scheggiatura sul posto di selci locali. Più catene operative indipendenti sono finalizzate alla produzione di lame, grandi lamelle e lamelle, le cui caratteristiche morfometriche mostrano regolarità nel profilo longitudinale, sezione triangolare o trapezoidale, spessore costante, indice di allungamento elevato.
La tipologia di strumenti e armature sottolinea l’appartenenza di tutti gli insiemi litici all’Epigravettiano recente. Gli strumenti comprendono bulini, grattatoi frontali lunghi su supporti laminari talora di prima scelta, lame ritoccate e altri tipi, mentre le armature annoverano principalmente microgravettes e punte a dorso, lamelle a dorso, lamelle a dorso e troncatura e sporadicamente elementi a doppio dorso, lamelle a ritocco semplice marginale e segmenti. Cronologicamente e culturalmente l’industria sembra posteriore allo stadio a microgravettes, lamelle a dorso e a dorso e troncatura con debole fenomeno di geometrizzazione, inquadrabile nell’Allerød, e documentato alla Grotta della Ferrovia, mentre sembra comprendere lo stadio a dorsi e troncature con forme geometriche trapezoidali e diminuzione delle microgravettes, documentato in una fase successiva nella Grotta del Prete, al limite tra Pleistocene e Olocene
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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