1,721,271 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
Analisi dell’estetica parte II: valutazione delle modificazioni del profilo causate dalla crescita, le disarmonie orali ed il trattamento ortodontico.
No full textDistalizzazione dei primi molari superiori con ancoraggio asimmetrico dei secondi molari. Casi clinici
No full textTechnological shocks and income inequality: an empirical investigation in Europe
No full textThe reduction of social and economic inequalities and the need to structure new forms of public intervention in order to guarantee the full social inclusion of all citizens have always been at the centre of the debate on how to organize and evolve the welfare state. Over the last forty years, the goal of increasing the efficiency and effectiveness of social protection systems has been placed firmly at the centre of policy makers' agendas. The aim of our paper is threefold. First, we test for the existence of a Kuznets curve analyzing a panel of 31 developed European countries in the pe-riod 2007-2018. Second, by exploiting the skilled-biased technological change (SBTC) hypothesis (Goldin and Katz, 1998; Galor and Moav, 2000; Aghion, 2002), we find that the change in the employment share of the high-tech sector is the main driver of the Kuznets swing. Third, in the field of social protection, we investigate what are the main policy implications than can be drawn in a similar context
Synthesis of silicon quantum dots in zinc silicate matrix by low-temperature process: Optical, structural and electrical characterization
No full textSilicon nano-crystallites dispersed in an insulating matrix of zinc silicates have been obtained by a two-step process, consisting of sputtering deposition of several alternated amorphous silicon and zinc oxide thin layers, followed by a chemical reaction carried out under vacuum at comparatively low temperature (from 450 °C to 560 °C) between stratified reagents. This low cost, low temperature and scalable process has to be considered promising in quantum dot fabrication technology. Several characterization techniques have been employed and large evidence has been found for the presence of silicon and zinc oxide nano-crystallites showing quantum confinement effect and related band gap enlargement. Photoluminescence phenomenon has been observed in the range 550-850 nm and a consistent explanation has been given in terms of exciton radiative recombination on trap states at the interface between Si dot and silicate matrix. Electrical measurements have given evidence for an expected material anisotropy where large difference between lateral and perpendicular resistivity values has been found. A technological strategy for transport property improvement has been prospected. © 2014 Elsevier B.V
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
Intrusione e distalizzazione-arretramento degli incisivi superiori mediante l’utilizzo di un filo al nickel titanio (Retranol). Casi clinici.
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Measuring the impact of broadband internet connections on economic growth (in a time of crisis): a OECD panel analysis
No full textTechnological innovation is viewed as a major stimulus for economic growth. High-speed internet access via broadband infrastructure has been experiencing a prompt development since the end of 90s, thanks to the deployment of both fix and mobile technologies. The present study investigates on the behavior of broadband diffusion as a technological component which may lead the economic growth in the main OECD countries. The estimations performed allowed to control and interpret the time evolution of the phenomenon under consideration according to the achievable target of growth as resulting from a policy action based on broadband internet connections. Then, our main goal is to provide evidence of a relevant –in quantitative term- relation between broadband diffusion and economic dynamics
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