1,720,958 research outputs found
Simboli della coesione e del conflitto. Alla ricerca di princìpi ponte
No full textCi si chiede se le religioni siano polemogene, e
se piuttosto non sia la spiritualità la manifestazione umana capace di
affratellare con simboli coesivi comunità in origine distanti e diverse fra
loro. Con spiritualità si intende ogni atteggiamento non materialistico
di ricerca di senso. Il simbolo costituisce il terreno comune sul quale
miti, forme di spiritualità e religioni rampollano da tempi immemorabili.
Scegliendo fra i molti esempi disponibili, possiamo indicare come
casi di spiritualità: l’ineffabilità del sentimento mistico di fusione con
l’altro da sé, le varie pratiche di ricerca anti-dogmatica su questioni
di fede, il superamento individuale del confine interno/esterno, la libertà
indomabile della scintilla divina che è ovunque, in ogni cosa, e
che ovunque si può manifestare (shinto, animismo, sincretismo antico e
moderno...), la solidarietà fraterna che lega tutti/e creature nella condizione
della finitudine. Qualcuno potrebbe obiettare che (a.1): l’alternativa
vera sarebbe piuttosto fra religioni (religere, legare insieme, eticità)
e sacro (mysterium fascinosum et tremendum). Gli ambiti di senso del
sacro sono; vita, morte, dissoluzione, rinascita, situazioni liminali, fragilità,
vulnerabilità, passaggi fra dimensioni dell’esistenza, finitudine,
condivisione della sofferenza. Quindi, non si nega qui
che esista chiaramente un nesso fra sacro e spiritualità. Lo si riconosce
nella ricerca asintotica e pluralistica di orizzonti simbolicamente
eccedenti la dimensione orizzontale dell’esistenza. Non immune da conflitti, che non sono di necessità esiziali
Enhancing Tungsten Oxide Gasochromism with Noble Metal Nanoparticles: The Importance of the Interface
No full textCrystalline tungsten trioxide (WO3) thin films covered by noble metal (gold and platinum) nanoparticles are synthesized via wet chemistry and used as optical sensors for gaseous hydrogen. Sensing performances are strongly influenced by the catalyst used, with platinum (Pt) resulting as best. Surprisingly, it is found that gold (Au) can provide remarkable sensing activity that tuned out to be strongly dependent on the nanoparticle size: devices sensitized with smaller nanoparticles display better H-2 sensing performance. Computational insight based on density functional theory calculations suggested that this can be related to processes occurring specifically at the Au nanoparticle-WO3 interface (whose extent is in fact dependent on the nanoparticle size), where the hydrogen dissociative adsorption turns out to be possible. While both experiments and calculations single out Pt as better than Au for sensing, the present work reveals how an exquisitely nanoscopic effect can yield unexpected sensing performance for Au on WO3, and how these performances can be tuned by controlling the nanoscale features of the system
La performatività politica dello spazio sociale
No full textCos'è la performatività sociale? E in che modo una performatività sociale dello spazio può condizionare le forme della politica
Per un pensiero dell’ospitalità: interpretare il limite e l’infinito
No full textIl saggio pone a tema la relazione tra i concetti di limite e di infinito, di fronte alla sfida epocale del fenomeno migratorio. La questione etico-politica risulta seconda rispetto al momento primo della considerazione teorica: l’ospitalità o la proprietà, prima di riguardare la definizione di un programma d’intervento, concernono la costituzione della coscienza stessa e la condizione umana, segnata dai suoi bisogni. Se il limite interessa necessariamente la definizione dei modi d’azione, l’infinito si impone come principio di apertura. Sui temi dell’ospitalità e dell’apertura di spazi, sono qui analizzate le tesi di alcuni autori collocate all’interno del dibattito contemporaneo, per riflettere sul nesso tensivo tra la limitazione e la dischiusura, così che l’una non si riduca alla paura dell’illimitato, e affinché l’altra richiami l’istanza etica irrinunciabile per il riconoscimento dell’umano
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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