1,721,112 research outputs found
Home-ownership in Europe:How did it happen?
Full text link<p>We use data from the third wave of the Survey of Health, Ageing and Retirement in Europe (SHARELIFE)(1) to document the different ways individuals first became home-owners across countries and over cohorts over the second half of the 20th century. Focusing on first-time home owners we find that younger cohorts became home-owners earlier and were more likely to do it through credit, less likely to inherit their home directly. Having higher human capital, being employed, married, having children and living in an urban area, all make it more likely to purchase a home with a mortgage. The persistence of family help in accessing home-ownership in many countries demonstrates the interrelation between family, market and the state in most of continental Europe. (c) 2012 Elsevier Ltd. All rights reserved.</p>
La nozione di narrazione nella valutazione del potenziale semiotico di un artefatto per l’apprendimento della matematica
No full textL’articolo si propone di affrontare il problema della valutazione di ciò che nella teoria della Mediazione Semiotica (Bartolini & Mariotti 2008) viene chiamato potenziale semiotico di un artefatto. L’analisi qui presentata è svolta in riferimento ad un particolare artefatto, il software AlNuSet, relativamente al dominio di apprendimento dell’algebra. Il potenziale semiotico di questo artefatto è analizzato attraverso un approccio differente da quello attuato dalle autrici della teoria della Mediazione Semiotica ma compatibile con tale quadro. L’approccio usato in questo lavoro è basato sulla nozione di affordance elaborata nel campo della Human Computer Interaction, su quelle di “narrazione”, di “pensiero narrativo” e di “pensiero paradigmatico” elaborate da Jerome Bruner , e sulla nozione di ciclo espansivo di apprendimento elaborata da Engeström.
L’analisi compiuta in questo lavoro è limitata ad un dominio di apprendimento e ad un artefatto ben definiti ma il metodo di valutazione del potenziale semiotico qui elaborato può avere una validità che trascende tali limiti
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
Vivaismo
No full textIl capitolo illustra le principali tecniche di preparazione delle piantine in vivaio per il pomodoro da industria e il pomodoro da mens
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
Cross-Country Differentials in Work Disability Reporting Among Older Europeans
Full text linkDescriptive evidence shows that there is large cross-country variation in self-reported work disability rates of the elderly in Europe. In this paper we analyse whether these differences are genuine or they just reflect heterogeneity in reporting styles. To shed light on the determinants of work-disability differentials across countries, we combine a wide set of individuals’ socioeconomic and health status characteristics with macro-economic indicators describing the institutional background of the country of residence
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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