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Arcipelago delle maree. Esplorare gli incerti confini della Venezia anfibia
No full textIl contesto geografico di Venezia e della sua laguna, con le peculiari fisionomie
insulari, è tra i sistemi ambientali e urbani più studiati al mondo. Le zone umide
costiere, le lagune e le isole sono state a lungo considerate spazi soglia in cui
terra, cielo e acqua si incontrano in dinamiche condizioni di materialità. Per
apprezzare la molteplicità di significati e la produzione di conoscenza ricavate
da questi ambienti anfibi, dobbiamo comprendere non solo la politica e le grandi
narrazioni, ma anche memorie personali, riflessioni, tradizioni locali e pratiche
vernacolari.
Il libro raccoglie la traduzione dall’inglese di un numero speciale dedicato
a Venezia e laguna, uscito nel 2021, per la rivista scientifica internazionale
di studi insulari Shima. L’argomento affrontato prendeva in considerazione
Venezia e il suo intorno lagunare, come un congiunto territoriale ibrido in cui
la continua mutazione, trasformazione e negoziazione ne fanno il carattere
distintivo. Un ‘cyborg-paesaggio’ dove i limiti tra natura e cultura, acqua e terra,
assenze e presenze, affollamento e desolazione sono precari e incerti, nonché
continuamente da negoziare e discutere. Questo è il punto di partenza per
cogliere la complessità locale e la marginalità di queste aree di transizione,
comunque in grado di richiamare ed evocare temi globali e opportunità
transdisciplinari
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
Platinum( 0)catalyzed reactions with diazoalkanes ; cyclopropanation ogf olefins and formation of azines
No full textHighly active [Pd(AcO)2(dppp)] catalysts for CO-C2H4 copolymerization in H2O-CH3COOH solvent [dppp= 1,3-bis(diphenylphosphino)propane]
No full textIn MeOH, [Pd(AcO)2(dppp)] becomes an efficient catalyst for the perfectly alternated CO-C2H4 copolymerization when used in combination of a relatively large amount of CH3COOH (CH3COOH/Pd, ca. 2.0×104). Under 4.56 MPa (CO/C2H4 = 1/1), at 90 °C, 7.5 kg polyketone/g Pd∗h are obtained. A significantly higher productivity is obtained in H2O-CH3COOH, in place of MeOH (27.5 kg polymer/g Pd∗h under 4.56 MPa (CO/C2H4 = 1/1), 90 °C, H2O=37% (mol/mol)). Under these conditions the catalyst undergoes only a minor deactivation with time as after 3 h the productivity decreases only by ca. 10%.
The NMR analysis shows that [Pd(AcO)2(dppp)] in CH3COOH-H2O yields a perfectly alternated polyketone of ca. 8000 g/mol bearing only ketonic end groups. During the course of the copolymerization reaction CO2 forms in significant amount. These findings suggest that the insertion of C2H4 into PdH bond starts the catalytic cycle, and that alternating insertions of the monomers followed by protonolysis of a PdC bond of a Pd-CH2-CH2-(CO-C2H4)n-H growing chain yields the polymer with only keto ending groups and a Pd-OH species; a reaction closely related to the WGS reproduces the starting Pd-hydride; deprotonation of this species to inactive Pd(0) is prevented by the acid
Intervista semistrutturata per la valutazione dell'efficacia delle terapie espressive
No full textObjective: Attention Deficit Hyperactivity Disorder (ADHD) is an important neuropsychological developmental disorder characterized by the presence of impaired attention, impulsivity and hyperactivity. In most cases, ADHD extends through adolescence and persists during adult age; hence, its treatment is often carried-out for long time periods. One of the drugs used to treat such disorder is atomoxetine, a selective noradrenaline re-uptake inhibitor. Acute atomoxetine efficacy has been extensively evaluated through numerous placebo-controlled trials. This study aims at testing the efficacy and safety of long-term atomoxetine use. Methods: In this international multicentre trial, 6-15 years-old children and adolescents with a DSM-IV diagnosis of ADHD were involved. All subjects were treated in an open-label basis for about 12 weeks with flexible-dosage atomoxetine. Patients who obtained symptom remission were randomly assigned to further 9 months of double-blind treatment with atomoxetine or placebo (Fig. 1). During the open-label phase, 604 patients were enrolled. Of these patients, 416 were considered responders and proceeded to the extension phase of double-blind atomoxetine vs. placebo, to assess the ability of the drug to prevent relapses. Results: Atomoxetine confirmed its efficacy in acutely improving ADHD symptoms, as shown by the statistically significant (p < 0.001) reduction of ADHD-RS-IV scores (Fig. 2). Of the initial 604 patients, 416 (69%) were considered responders. Atomoxetine was superior to placebo in long term in preventing relapses, which occurred significantly less in the group of patients receiving atomoxetine with respect to the group receiving placebo (Figg. 3, 4). The effect of atomoxetine was superior to that of placebo also in some secondary outcomes, such as psychosocial functioning. The drug's safety and tolerability were similar to those observed during acute, short-term studies (Tab. III). Conclusions: The results of this study provide evidence of the efficacy of atomoxetine in maintenance treatment of paediatric patients affected by ADHD. The effect on psychosocial functioning as well as that obtained on core symptoms of ADHD seems to extend also in the long-term treatment period
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