1,721,108 research outputs found
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
Italiani di origine libica a Roma: la formazione di una popolazione a partire da un flusso in via di esaurimento
No full textNel saggio si ripercorre la vicenda del processo di inserimento degli immigrati dalla Libia e dei loro discendenti nella realtà romana. Partendo dalla considerazione che i flussi di italiani espulsidalla Libia si differenziano sulla base del culto esercitato (ebraico o meno) si è verificata l’ipotesi per cui i due gruppi assumono modelli di comportamento diversi sia per quanto riguarda la formazionedella famiglia che la localizzazione residenziale. Nel caso dei non ebrei di origine libica le strutture familiari e il modello di insediamento è diverso da quello degli ebrei di origine libica (icosiddetti ‘tripolini’): la presenza è concentrata in parti completamente differenti della città, le famiglie sono più contratte ma maggiormente aperte all’afflusso di nuovi componenti.Italians of Libyan Origin in Rome: the Formation of a Population Derived from an Ancient FlowThis article traces the history of the integration process of Italian immigrants from Libya, and their descendants, in Rome. Starting from the consideration that the flow of Italians expelled from Libya was differentiated on the basis of the religion exercised (Jewish or not), the hypothesis that the two groups showed different patterns of behavior both in terms of family formation and place of residence is tested. In the case of non-Jews, family structures and settlement pattern are different from those of the Jews of Libyan origin (the so-called ‘Tripolini’): the population is concentrated in completely different areas of the town, the families are smaller and households are more open to the influx of new components
Il comportamento demografico e socio-economico nelle regioni italiane:divari e convergenze
No full textWhile frequently discussed with reference to the evolution of percapitanet income, the convergence process is poorly used analyzingdemographic and social phenomena. Aim of this paper is toapply a convergence analysis among the Italian regions with reference to demographic and socioeconomic series. Female and male life expectancy at birth observed from 1974 to 2008, the Total Fertility Rate (1952-2008), the percentage of employees with a permanent contract for both sex observed in the 1993-2010 period are examined in our research. Following a large employed methodology developed by Barro and Sala-i-Martin two classical convergence parameters are estimated: the σ-convergence, that is the variance of the log of each parameter, and the β-convergence, that is the speed of the convergence process. Each phenomenon shows absolute β-convergence and σ-convergence in each period observed, with some significant exception due to specific factors. In the 35 years of life expectancy at birth the analysis shows a greater male speed of convergence with comparison to the female; also the σ-convergence appears for both sexes, in a less systematic way in the case of female evolution. Italian regions converge also by analyzing the total fertility rate trend. The β-convergence (that ranges between 0.2 and 1 per cent) is however less intensive and the σ-convergence appears sometime to exhibit a fuzzy pattern. The percentage of dependent workers with a permanent contract for both sexes shows β-and σ-convergence in 1993-2010 years. The speed of β-convergence is onaverage around 4 per cent, higher for women than for men. A diffusion of the occupational instability with regards to dependent job emerges in all the regions, jointly with the traditional and persistent diversity between the Centre-North and the Southern area of the country
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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