1,721,469 research outputs found
Spillovers among energy commodities and the Russian stock market
No full textWe examine the connectedness in the energy commodities sector and the Russian stock market over the period 2005–2020 using the variance decomposition approach. Our analysis identifies the booms and busts in the correspondence of political and war episodes that are related to spillover effects in the Russian economy, as well as the energy commodities markets. Our findings show that the Russian Oil & Gas and Metals & Mining sectors are net shock contributors of crude oil and have the highest spillovers to other Russian sectors. Furthermore, we disentangle the sources of spillovers that originated from the financial and energy commodity markets and find that a positive change in the energy commodity volatility spillover is associated with an increase in Russian geopolitical uncertainty. Finally, we show that the spread of COVID-19 increases the stock market volatility spillover, whereas it lowers the energy commodity volatility spillover
Déjà-vu e statues quo. Fronti museali e fronti monumentali
No full textIl capitolo riguarda alcuni casi relativi ai primi mesi di guerra in Ucraina dal versante dei «fronti museali» e dei «fronti monumentali», coinvolti in azioni di resistenze culturali, miti eroici e costruzioni identitarie. Si concentra in particolare sulle iniziative messe in campo da alcuni musei Ucraini, come il Chanenko o il War museum di Kyïv, con le prime mostre sulla guerra in corso o le visite a musei vuoti, e su quelle per la protezione di monumenti o, viceversa, per la loro trasformazione o la loro distruzione. Ogni paragrafo e seguito da un breve post scriptum che, con un unico esempio, aggiorna di alcuni mesi la situazione talvolta capovolgendone presupposti o attese
Do They Hurt? Macroeconomic Effects of Reforms on Three Diverse Oil Exporters: Russia, Saudi Arabia and the UK
No full textLa perlina mancante. Poesie di un dog soldier scritte in esilio
No full textRaccolta di poesie inedite del poeta cheyenne Lance Henson. Prefazione, curatela, traduzione di poesie inedite e nota biografica a cura di Mariella Lorusso. In ogni creazione di un artigiano cheyenne la sapienza e la cura donate alla realizzazione di un oggetto vengono percepite come un atto sacro. Che si tratti di un mocassino ricamato di perline, di una cintura, di un disegno su una borsa di pelle, di uno scialle, di un dipinto o di una poesia, i disegni sono dotati di riferimenti mitologici e metafisici. Quando tali oggetti vengono creati per essere venduti a persone non-cheyenne qualcosa nel disegno viene intenzionalmente omessa. Questa si chiama “perlina mancante”
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
Conceptual modeling in product design within virtual reality environments
Full text linkDigitalization has already permeated most of the design activities, but in spite of this, the generation of visual representations of concepts in the product design domain still relies on analog tools in real world contexts. Despite immersive 3D technologies, such as Virtual Reality, have become widely available and affordable, most designers still make use of pencils and paper sheets, or their digital counterparts, to sketch their initial ideas on 2D supports. This study aims at investigating the reasons behind the mismatch between the rapid growth of immersive technologies and their scarce adoption in the conceptual design activities. Based on the analysis of the state of the art, a classification of the approaches proposing new ways to conduct conceptual representation of products has been drawn. The geometry representation, i.e. parametric or polygonal, and the interaction methods have been taken as metrics to categorize previous works. Weak connections between the modeling paradigm implemented and the interaction methods, lack of spatial faithfulness, ergonomic concerns and the need for quantitative metrics to compare objectively the data resulting from different testing sessions across the various studies are the main issues identified. In order to get concrete evidence of such thoughts, an experimental session has been devised with users from different backgrounds. They were asked to make conceptual sketches of a computer mouse in a traditional fashion, i.e. with pen and paper, and using two off-the-shelf Virtual Reality applications, based on 3D sketching and 3D sculpting respectively. The results are discussed qualitatively by visually comparing the sketches made by the testers, enriched by information deducted by surveying the users before and after the experiments. By comparing the sketches made by each user with the three procedures, preliminary results indicate that VR systems don't bring dramatic improvements compared to traditional 2D sketching tools. Furthermore, despite being enjoyable, VR systems caused physical fatigue, which is a problem that basically does not affect 2D sketching. Despite the size of the sample cannot provide statistical evidence, the outcomes provided good indications about the technology readiness level of Virtual Reality as a conceptual design tool, paving the way for future research directions
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