1,720,962 research outputs found
Una nuova governance per lo sviluppo
No full textNell'analisi economica, lo spazio non e' considerato soltanto come una sorgente di costo per le imprese, ma diviene il punto di incontro tra gli attori dello sviluppo, in cui si organizzano le forme di cooperazione tra le imprese e si decide la divisione sociale del lavoro. Il passaggio dai Distretti Industriali ai Distretti Produttivi in Puglia e' nato inizialmente dalla necessita' di distaccarsi da una logica frammentata per passare ad una visione globale del territorio
The statistical matching: an integrated archive of lifestyle of italian families
No full textThe objective of the techniques of integration for data from a number of different sources is to identify records relating to similar or identical units, to estimate the unified distribution of a number of variables observed in different data archives and to merge informative records. The present work will describe a model of data integration through a methodology of Statistical Matching (hot deck distance) for the integration of two surveys (Eu-Silc Istat and Lifestyle Survey University of Bari). The construction of an integrated database on the basis of these two surveys may be useful for the study of consumer behavior in relation to specific groups of commodities, in order to analyse the decisions taken by families with regard to saving, to examine economic and social inequality, and to study the impact of public policies by means of simulations. The coexistence of multiple and differentiated objectives triggers the need to obtain a very general and versatile integrated file, which provides ongoing detailed information on the different types of spending, on levels of saving, on the distribution of incomes, on the occupational conditions of the members of the family unit, etc
A modified density-based algorithm for clustering
No full textThe aim of this paper is to compare two different clustering methods
We consider DBSCAN before in terms of reachability and after in terms of
ordering (OPTICS algorithm); the other based on the use of Seg-DBSCAN our
new version of DBSCAN that limits the arbitrariness of the choice of input
parameters. As an application we use a meaningful data set and we compare the
described methods
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
Le tecniche di Statistical Matching: un archivio integrato sugli stili di vita delle famiglie
No full textLe tecniche di integrazione di dati provenienti da più fonti hanno l’obiettivo di identificare record relativi ad unità simili o uguali, di stimare la distribuzione congiunta di più variabili osservate su diversi archivi di dati e di fondere record informativi.
Nel presente lavoro si illustra un modello di integrazione di dati attraverso una metodologia di Statistical Matching (hot deck distance) per l’integrazione tra due indagini (Eu-Silc Istat e Indagine stili di vita)
Le tecniche di integrazione di dati per lo studio della povertà
No full textIl presente lavoro si pone come obiettivo la costruzione di un
archivio integrato tra consumi e redditi delle famiglie italiane, con particolare
attenzione per le famiglie considerate povere. Al fine di creare un data
base integrato si ricorre alle tecniche di integrazione tra due archivi gestiti
dallIstat, lIndagine sui Consumi delle famiglie italiane e lIndagine su
Reddito e Condizioni di vita (Eu-Silc). Le metodologie, con fondamento statistico,
utilizzate per lintegrazione di dati provenienti da più fonti, possono
essere raggruppate in due tipologie: record linkage (abbinamento esatto) e
statistical matching (abbinamento statistico). Nel presente lavoro si fa ricorso
a tecniche di abbinamento statistico con lobiettivo di identificare record
relativi ad unità simili, di stimare la distribuzione congiunta di alcune variabili
osservate sui due archivi di dati e di fondere record informativ
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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