1,720,983 research outputs found
Il Centro storico. La solitudine del Monumento
No full textSi documenta sul progetto redatto insieme agli allievi della Scuola di Dottorato di Reggio Calabria, sul progetto per il centro storio di S. G. in Fiore. Il progetto per la valorizzazione dell'abbazia Florense fondata da Giocchino da Fiore è parte del programma. la struttura monumentale dell'abbazia non partecipa pacificamente al paesaggio della Sila: si pone come sua unità di misura. Al di là della qualità architettonica, il suo valore è da ricondurre in primo luogo al suo significato religioso e poi alla collocazione rispetto al paesaggio che la circonda
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
First synthesis of 2,6-diazabicyclo[3.2.0]heptane derivatives
No full textThe first synthesis of 6-phenyl-2,6-diazabicyclo[3.2.0]heptane 1 and its orthogonally protected precursor 2 is herein
reported. Our strategy enables to chemically address the two nitrogen atoms of 2,6-diazabicyclo[3.2.0]heptane core individually
and selectively, thus allowing rapid access to several subsets of widely substituted fused azetidines. (C) 2009 Elsevier Ltd. All
rights reserved
Microwave-assisted aminocabonylation of aryl bromides at low carbon monoxide pressure
Get PDFAn efficient and rapid procedure for microwave-assisted aminocarbonylation of aryl bromides and iodides at low CO pressure, using (PPh3)(2)PdCl2 or Pd(OAc)(2) as catalysts is reported. Different reaction conditions have been tested in order to carry out the reaction even on less nucleophilic anilines such as 2-chloro-4-nitroaniline, allowing a rapid access (in 20-30 min) to several diverse arylamides in good yields
Synthesis of 3-azabicyclo [4.1.0]heptane-1-carboxylic acid
No full textA full study on the synthesis of 3-azabicyclo[4.1.0]heptane-1-carboxylic acid is described.Three different approaches were investigated in order to achieve an efficient synthesis of this unnatural aminoacid.The optimized synthetic route relies upon three key steps: (i) diazomalonate insertion on 4-phtalimido 1-butene, (ii) intramolecular cyclization and (iii) chemoselective reduction of the resulting lactam.Due to its bicyclic nature and conformational constraints, this aminoacid may be an useful building block in medicinal chemistry. © 2010 Elsevier Ltd.All rights reserved
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