1,721,005 research outputs found
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
L’inglese come lingua di contatto ai tempi delle migrazioni trans-mediterranee
No full textNegli ultimi decenni, l’aumento incessante dei flussi migratori sulle rotte Afro-Mediterranee ha rafforzato l’interazione tra lingue e gruppi linguistici e ha fatto si che i soggetti migranti portassero con sé le loro lingue adattandole ai repertori locali. In questa prospettiva, va letta la proposta di individuare nuovi percorsi di descrizione e di interpretazione di una realtà in cui la lingua è un luogo da condividere e un confine da attraversare che segna, tra l’altro, relazioni di potere gerarchiche ed egemoniche tra i territori e i rispettivi abitanti. Difatti, poiché la lingua riflette e struttura le nostre ideologie e visioni del mondo, essa non è in alcun modo innocente o neutrale. Questo è particolarmente riscontrabile nel momento in cui si utilizza, per esempio, l’inglese come lingua franca nei contesti migratori e nelle zone di contatto trans-mediterranee. Da qui, ci si interroga sul ruolo egemonico e sulle relazioni asimmetriche di potere che l’inglese come (ex-?) lingua coloniale ha creato nel contesto della globalizzazione. Nello specifico, questa ricerca illustrerà come ciò che rende lo scenario odierno diverso da quello dei tempi del colonialismo è l’emergere tanto di varietà linguistiche nate dal contatto sempre maggiore fra persone che hanno patrimoni linguistici e culturali differenti, quanto di una modalità di comunicazione ELF (English as a Lignua Franca) che si attesta sempre più come lingua di contatto, lingua-ponte, flessibile, contingenziale, instabile e predisposta alla co-costruzione cooperativa del significato per il buon esito della comunicazione interculturale
Mulching with almond hull and olive leaves for weed control in fennel (Foeniculum vulgare Mill.) cultivation and flower beds
Full text linkWeeds are a major problem in cropping systems and in urban areas. The aim of this study was to assess the effectiveness of organic mulching with olive leaves and almond hulls to control weeds in fennel (Foeniculum vulgare Mill.) and in flower beds (urban areas). A 3-cm thick layer of olive leaves or almond hulls was applied as mulching material in fennel. Control consisted of both an unmulched treatment and a weed free control. Moreover, in a flower bed of a railway station, plots mulched with 3 cm layer of olive leaves and almond hulls were compared with an unmulched treatment. Weed infestation was evaluated and the weights of the whole plant and of the marketable part of fennel (grumolo) measured. Mulching with olive leaves and almond hulls reduced weed infestation in both vegetable crop and flower beds. However, olive leaves reduced the weights of the whole plant and of the grumolo. The adoption of almond hulls and olive leaves as organic mulches could be an effective strategy for weed control. Further investigations should be carried out to assess whether the effectiveness of these mulching materials is mainly due to a mechanical activity or allelopathic compounds also play a significant role in weed suppression
Rapporti tra ambienti e sistemi pastorali: gestione delle risorse alimentari e risultati produttivi.
No full textVariations 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
Trifolium mutabile as new species of annual legume for mediterranean climate zone: First evidences on forage biomass, nitrogen fixation and nutritional characteristics of different accessions
Full text linkThe present study evaluated the forage production, nitrogen fixation and the qualitative characteristics of different accessions of Trifolium mutabile, a new species of annual clover, collected in southern Italy. Forage traits were assessed by harvesting plants at the vegetative stage (stem elongation) and the subsequent regrowth at the flowering stage (inflorescence emergence-main shoot). From results, significant differences were found among the accessions of T. mutabile in terms of forage biomass production (from 5.1 to 8.2 t ha−1 dry matter), capacity of nitrogen fixation (58.2–76.8% Ndfa) and forage nutritional characteristics. Besides the high forage yield, the investigated accessions showed favourable values of production and quality, representing also worthy germplasm for selection programs as well as the application for possible plant cultivar registration. Moreover, it is interesting to underline that T. mutabile may represent a valuable alternative to commonly cultivated annual clover species due to its prolonged vegetative cycle. However, further investigations are needed to assess the self-reseeding capacity of T. mutabile when utilized as pasture species
Seed productio and characterization of two local varieties of carrot: Bastinaca di SAn Vito and Pestanaca di Santo Ippazio
No full textAppropriate 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
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