1,354,073 research outputs found
L'agricoltura nel comprensorio del fiume Morto
No full textSi può parlare di un’“agricoltura del fiume Morto”, facendo riferimento con questa locuzione in primo luogo alla delimitazione geografica di un particolare distretto rurale (quello che si sviluppa lungo le sponde del corso d’acqua) ed in seconda battuta ad un insieme di condizioni ambientali che, a dispetto dei mutamenti subiti dalle società umane, ha determinato, nel corso degli anni, l’affermazione di una tipologia di organizzazione produttiva distinguibili da quelle riscontrate in altri settori dell’area pisana.
Ciò che quindi si intende proporre, attraverso la stesura di questa nota, è una un'analisi dei principali caratteri e dei cambiamenti che l’attività agricola presenta risalendo il corso del fiume Morto, limitando l’ampiezza del “buffer” considerato ad una porzione di territorio che possa dimostrare qualche relazione con la presenza del suddetto canale di bonifica
Evaluation of the use of lenacil for weed control in spinach (Spinacia oleracea L.)
No full textThe action of the herbicide lenacil on spinach cultivation was evaluated, with the overall object of reaching a compromise between an advanced agronomic technique and environmental protection. A spinach crop was treated at pre-emergence with Venzar® at the dosage of 1.0 kg ha-1 and the residues were analyzed in spinach plants collected 30 and 60 days later. One month after lenacil spraying, the concentration of residues in spinach leaves was 0.102 ppm, whereas two months after the treatment the amount of residues was drastically reduced to 0.009 ppm. The efficacy of lenacil in weed control, measured in 60% reduction of weed density, was assessed in comparison to untreated plots
The Selection of Serum-independent PC12 cells for a more-reliable Manganese Cytotoxicity Test
No full text#Grandtourists. Immersioni nelle collezioni, accumulazioni e ossessioni dei musei e degli archivi di Parma / An immersion in the collections, accumulations and obsessions of the museums and archives of Parma
No full textIl volume restituisce gli esiti del programma di residenze di studiosi, curatori, direttori di musei presso la rete di musei e archivi di Parma nel corso del 2017. Sono quindi raccolti saggi di Kurt Forster, Michele Lanzinger, Martino Stierli, Elisabetta Terragni, Luca Vitone, introdotti da un testo di Jeffrey Schnapp che ha suggerito il programma di residenze, di Francesca Zanella che insieme a Marina Gorrei ha ideato il progetto ed Elisabetta Modena che ha coordinato le attività. A completamento brevi testi di introduzione dei musei coinvolti (Museo di Storia naturale, Orto Botanico e Centro Studi e Archivio della Comunicazione dell'Università di Parma, Museo Glauco Lombardi, Museo Ettore Guatelli e Archivio di Stato di Parma)
mSR and SQUID investigation of ammoniated lithium fullerides
No full textThe ammoniation of lithium-doped C60 gives rise to (NH3)6LixC60, a system which is chemically expanded while maintaining C60 original cubic symmetry and hence the threefold degeneracy of the C60x- frontier orbitals. Nevertheless, the on-site repulsion U dominates the bandwidth W and, by overcoming the effect of orbital degeneracy, brings to electron localisation. Muon-spin relaxation (μSR) and SQUID magnetometry were used to confirm the presence of a magnetically ordered phase at low temperatures, already reported by Durand and co-workers [Nat. Mater. 2 (2003) 605]. Surprisingly, neither the expected antiferromagnetism nor the even-odd effect on electron band filling were observed down to 2 K
Si and Sn doping of ε-Ga2O3 layers
No full textLow resistivity n-type ε-Ga2O3 epilayers were obtained for the first time either by adding silane to the gas phase during the metal organic vapour phase epitaxy deposition or by diffusing Sn in nominally undoped layers after the growth. The highest doping concentrations were few 1018 cm−3 and about 1017 cm−3 for Si and Sn doping, with corresponding resistivity below 1 and 10 Ω cm, respectively. Temperature dependent transport investigation in the range of 10-600 K shows a resistivity behavior consistent with the Mott law, suggesting that conduction through localized states dominates the electrical properties of Si- and Sn-doped samples. For both types of dopants, two different mechanisms of conduction through impurity band states seem to be present, each of them determining the transport behavior at the lower and higher temperatures of the measurement range
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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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