1,721,044 research outputs found
Risultati preliminari di prove di controllo di Alnus viridis mediante il pascolo caprino in: Zootecnia di Montagna, valorizzazione della agricoltura biologica e del territorio
No full textAlnus viridis is usually browsed by goats. Since its high palatability and nutritive value
are high goats browsing could be used an effective and economic tool for clearance of alpine
pastures encroached by this shrub. In order to test the impact of goat browsing on Alnus viridis a
trial was carried out during late august 2000in Camonica valley (Central Alps) by a site at 1610 m
elevation, 18° inclination, SW exposure (46° 18’N, 10°31’E). A fenced area of about 2,000 m2 with
an average shrubs coverage of 50% was utilised during a 10 days trials. 20 goats of Bionda
dell’Adamello breed were maintained for 2-3 days within each of 4 plots. Goats removed 44% of
the available mass (leaves, sprouts and fruits) and were able to ingest more than 1 kg DM/d/head.
Other utilised species were: Festuca varia, Rubus idaeus, Senecio nemorensis, Anthirium filis mas
but their contribution to the diet was quite low. In order to obtain a more efficient control of Alnus
viridis it could be useful to browse the regrowth induced by a first early cycle of defoliation
Il mondo e la società internazionale. Sul nesso Toynbee-Wight
No full textIl richiamo, fin da titolo, del mondo e della società internazionale ha un moti- vo preciso. Non si tratta di un semplice omaggio formale al celebre volume di Toynbee sul mondo e l’Occidente che tanto scalpore suscitò. Non è neppure il mero ossequio a una nozione «groziana» divenuta cruciale in quella tradizione di ricerca che individua in Wight un caposcuola, la cosiddetta Scuola inglese. Il richiamo a questa coppia concettuale riguarda invece un principio metodologico che guida questo scritto. Consiste nel selezionare e isolare un nucleo tematico attorno al quale si costituì il rapporto tra questi studiosi, considerandolo l’elemento fondamentale del nesso Toynbee-Wight che qui verrà trattato. Procederò quindi tentando di chiarire temi e problemi legati alla società internazionale e alla politica mondiale, considerati attraverso affinità e divergenze presenti nel contributo dei due studiosi
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
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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