1,721,014 research outputs found
Destino della musica europea nell'epoca dei regimi totalitari
No full textIl saggio descrive, con particolare riferimento all'ambito della musica colta, i principali aspetti della politia culturale nell'Italia fascista, nella Germania nazista e in Unione Sovietica
L'identità urbana perduta: tradizione e contaminazione per un nuovo senso del luogo.
Full text linkIn una società globalizzata tutto avviene istantaneamente. Le contaminazioni economiche, sociali, architettoniche, delle idee, attraversano i diversi spazi geografici. La sfida è quella di trovare strumenti e, soprattutto, sviluppare percorsi di studio che permettano di assorbire la ricchezza dei sempre nuovi influssi culturali, senza perdere l’identità sociale e territoriale del tessuto urbano italiano che, per secoli, ne hanno caratterizzato il paesaggio.
Mentre le scienze sociali e quelle urbanistiche e architettoniche hanno saputo cogliere ed evidenziare particolari situazioni di cambiamento e nuovi modelli di rapporti sociali ed economici, che hanno consentito di sviluppare proposte pianificatorie e di programmazione, c’è da chiedersi se, allo stesso modo, la geografia sia stata di supporto concreto per una idonea progettazione di nuovi ambienti urbani e territoriali.
Le stesse ricerche sulla città sostenibile non riescono a fornire adeguate soluzioni al problema, che non è solo legato all’esigenza d’innovazione tecnologica, ma soprattutto ad un’idea di città che pone alla propria base una peculiare concezione sociale e culturale (civitas), già nel passato caratteristica fondamentale offerta dalle città italiane ed europee in genere.
Tuttavia mantenere la tradizione e l’identità urbana tout court equivale a “mummificare”, in un’illusoria scenografia, uno spazio territoriale, mentre il tessuto sociale e le relazioni ne modificano continuamente la reale portata e le specifiche caratteristiche sociali.
La contaminazione selettiva è, al contrario, capace di introdurre nell’ambiente sociale e, conseguentemente nella struttura spaziale, elementi di novità capaci di modificare il valore contemporaneo di quella società senza dimenticare, ovviamente, l’eredità storica dei territori.
Il contributo intende proporre alcune riflessioni su questi temi, anche con riferimento a risultati di ricerche già avviate in diverse realtà urbane italiane ed internazionali.In a globalized society everything happens instantaneously. The social, economic, and architectural influences of ideas cross different geographical areas. The challenge is to find tools, and especially to develop study pathways, which can absorb the wealth of new cultural influences, without losing the social and spatial identity of the urban fabric which has characterized the Italian landscape for centuries.
Social, urban and architectural sciences can today capture and highlight particular situations of change and new patterns of social and economic relationships in order to inform planning proposals. But the question is whether geography can also provide support in the appropriate design of new urban and regional environments.
As well as the need for technological innovation, the problem particularly concerns the idea of a city based on civitas, a social and cultural concept which has historically been a key feature of Italian and European cities. Even research on sustainable cities has failed to offer adequate solutions.
Simply maintaining tradition and urban identity is equivalent to "mummification" of an area as a visual illusion, while underlying social relations and fabric may be continuously modifying social reality. A selective fusion, on the other hand, can introduce elements that can modify the contemporary value of a society while taking into account the historical legacy of place
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
A Novel Approach for Segment-Length Selection Based on Stationarity to Perform Effective Connectivity Analysis Applied to Resting-State EEG Signals
Full text linkConnectivity among different areas within the brain is a topic that has been notably studied in the last decade. In particular, EEG-derived measures of effective connectivity examine the directionalities and the exerted influences raised from the interactions among neural sources that are masked out on EEG signals. This is usually performed by fitting multivariate autoregressive models that rely on the stationarity that is assumed to be maintained over shorter bits of the signals. However, despite being a central condition, the selection process of a segment length that guarantees stationary conditions has not been systematically addressed within the effective connectivity framework, and thus, plenty of works consider different window sizes and provide a diversity of connectivity results. In this study, a segment-size-selection procedure based on fourth-order statistics is proposed to make an informed decision on the appropriate window size that guarantees stationarity both in temporal and spatial terms. Specifically, kurtosis is estimated as a function of the window size and used to measure stationarity. A search algorithm is implemented to find the segments with similar stationary properties while maximizing the number of channels that exhibit the same properties and grouping them accordingly. This approach is tested on EEG signals recorded from six healthy subjects during resting-state conditions, and the results obtained from the proposed method are compared to those obtained using the classical approach for mapping effective connectivity. The results show that the proposed method highlights the influence that arises in the Default Mode Network circuit by selecting a window of 4 s, which provides, overall, the most uniform stationary properties across channels
CADMIUM EFFECTS ON SUBCELLULAR CALCIUM SIGNALLING: A COMPLEX SCENARIO REVEALED BY DIFFERENT FLUORESCENT PROBES
No full textVariations 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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