1,720,992 research outputs found
Progetto di riqualificazione dello spazio pubblico centrale del quartire San Donato a Bologna
No full textIl progetto presentato è stato realizzato Bologna nel quartiere San Donato in esito alla seconda edizione del concorso in due fasi “Bella Fuori” bandito dalla Fondazione del Monte di concerto con il Comune di Bologna (2008/2011). Si tratta di un intervento di riqualificazione urbana, a “zero cubatura”, finalizzato alla realizzazione di uno spazio pubblico all’intero di una centralità urbana, individuata dal Piano Strutturale. È un lavoro condotto con pazienza e tenacia cercando di superare gli ostacoli di varia natura che si interpongono tra progetto e realizzazione e soprattutto tra la volontà di mantenere alto il livello qualitativo dei risultati e il realismo a ribasso al quale conducono regolamenti, vicoli, veti incrociati, esiguità delle risorse. Un progetto portati avanti con rigore e spirito di servizio, con grande economia di mezzi, non solo espressivi, cercando di dimostrare che c’è la possibilità di fare bene con poco, non solo perché è questo che ci impone la decrescita
Theory and algorithms for chiroptical properties and spectroscopies of aqueous systems
Full text linkChiroptical properties and spectroscopies are valuable tools to study chiral molecules and assign absolute configurations. The spectra that result from chiroptical measurements may be very rich and complex, and hide much of their information content. For this reason, the interplay between experiments and calculations is especially useful, provided that all relevant physico-chemical interactions that are present in the experimental sample are accurately modelled. The inherent difficulty associated to the calculation of chiral signals of systems in aqueous solutions requires the development of specific tools, able to account for the peculiarities of water-solute interactions, and especially its ability to form hydrogen bonds. In this perspective we discuss a multiscale approach, which we have developed and challenged to model the most used chiroptical techniques. This journal i
An efficient and robust procedure to calculate absorption spectra of aqueous charged species applied to NO2−
Full text linkAccurate calculation of absorption spectra of aqueous NO2−requires rigorously sampling the quantum potential energy surfaces for microsolvation of NO2−with at least five explicit water molecules and embedding the resulting clusters in a continuum solvent accounting for the statistical weighted contributions of individual isomers. This method, which we address as ASCEC + PCM, introduces several desired features when compared against MD simulations derived QM/MM spectra: comparatively fewer explicit solvent molecules to be treated with expensive QM methods, the identification of equilibrium structures in the quantum PES to be used in further vibrational spectroscopy, and the unequivocal identification of cluster orbitals undergoing electronic transitions and charge transfer that originate the spectral bands
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
ORG/CTC-KN-01 Bridging the Gap between Theory and Experiment: Modeling Chiroptical Properties and Spectroscopies
No full textThe tremendous progress of ab-initio quantum chemistry in the last decades has led
to an increasing number of applications of quantum mechanical (QM) approaches
to the calculation of chiroptical properties [1-7].
The progress has been so large that a ‘‘renaissance’’ in chiroptical methods due to
the accuracy and computational efficiency achieved by ab initio QM methods in
reproducing experimental data and predicting new ones has been invoked [8].
In this contribution, some peculiar aspects of the computation of chiroptical
properties and spectroscopies are remarked through the analysis of case studies,
with special emphasis towards the gaining of calculated data directly comparable to
experiments, by the inclusion of solvation and vibrational effects
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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