1,721,022 research outputs found
Cesarotti e Leopardi linguisti
No full textAttraverso una lettura comparata del "Saggio sulla filosofia delle lingue applicato alla Lingua Italiana" di Melchiorre Cesarotti e dello "Zibaldone di Pensieri" di Giacomo Leopardi si cerca di mettere in parallelo le idee linguistiche dei due autori. Dopo aver assodato la sostanziale assenza (perlomeno come influsso diretto) del Cesarotti linguista nello "Zibaldone" e nelle altre opere leopardiane, il saggio intende mostrare che un accostamento fra Cesarotti e Leopardi linguisti ha senso solamente sulla base di un approccio non per filiazione d’idee, bensì per messa a confronto di due modi diversi – diversi per molteplici ragioni (temperie culturale, biografia, formazione, ecc.) – di svolgere la riflessione sulle lingue, tenendo sempre conto del fatto che spesso tale riflessione aveva che fare con temi ampiamente e a lungo dibattuti nella cultura italiana ed europea dell’epoca. Due sguardi differenti sul linguaggio e le lingue, insomma, e complementari nella loro unicità e modernità
Cesarotti e van Goens. Un carteggio europeo
No full textIl contributo fa luce sul rapporto epistolare tra M. Cesarotti e il filologo olandese M.R. van Goens (in appendice alcune lettere di Cesarotti a van Goens che non figurano nell'epistolario ottocentesco del padovano)
Cesarotti e Alfieri
Full text linkIl saggio ricostruisce le vicende del complesso rapporto sviluppatosi nel corso del tempo tra Alfieri
e Cesarotti. Alfieri ha inizialmente grandissima stima per l'autore delle «Poesie di Ossian», che considera un eccellente modello per il suo verso tragico e di cui stende un ampio Estratto. Le critiche espresse da Cesarotti nella «Lettera su "Ottavia", "Timoleone" e "Merope"» provocano però la ferma replica di Alfieri, che difende con decisione le propria scelte in fatto di stile. La «Lettera» determina un brusco cambiamento dell’atteggiamento di Alfieri, che esprimerà infine un giudizio estremamente severo nei confronti delle traduzioni omeriche di Cesarotti
Asymmetric hydrogenation catalyzed by aminophosphine-phosphinite rhodium complexes derived from natural aminoalcohols
No full textOn the relation between carbonyl stretching frequencies and the donor power of chelating diphosphines in nickel dicarbonyl complexes
No full textThe relation between spectroscopic observables and the detailed metal-ligand bonding features in chelation complexes is addressed using both experimental and state-of-the-art theoretical and computational methods. We synthesized and characterized a set of six nickel dicarbonyl complexes of general formula [Ni(CO)2(PP)], where PP is an atropoisomeric chelating diphosphine ligand. The analysis of the obtained experimental data and the basicity and oxidative potentials of the free ligands suggests a close relation between the donor ability of the chelating ligand and the carbonyl stretching frequencies observed in the complexes. We then use theory to unravel the detailed mechanisms of chelation-bond formation in terms of partial charge flows between the molecular orbitals of the fragments. By extending the promising, recently published natural orbitals for chemical valence/charge displacement (NOCV/CD) analysis scheme we provide a thorough, quantitative description of the several charge fluxes following the metal-ligand bond formation and demonstrate that the carbonyl stretching frequencies in the considered complexes selectively respond to the σ-donation charge flow from the phosphorus lone pairs of the ligands, with the frequency shift being in quantitative correlation with the extent of the ligand-to-metal charge transfer
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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