1,721,037 research outputs found
A tentative tale of Stone Age human dynamics in Pleistocene south-western Libya (central Sahara)
No full textThe area encompassing the Acacus and Messak mountains in South Western Libya, similarly to the other central Saharan massifs, is characterized by a deeply eroded landscape where Quaternary geo-archaeological archives are rare, especially Pleistocene ones, making it difficult to understand and contextualize past human dynamics within a solid chrono-paleoenvironmental framework. Except for the few caves and open-air contexts where Pleistocene sedimentary sequences are preserved, the vast majority of archaeological evidence from the region is represented by lithic artefacts found on the surface of deflated open-air sites. Nonetheless, artefacts still stand as the main references used to build a rough framework for population dynamics through time. Although the evidence is not as solid as we would like, it allows us to at least reconsider connecting the human presence solely to green phases, as a number of population dynamics related to arid landscapes have inferably occurred in the late Middle Pleistocene and in the Late Pleistocene. Coping with changing or difficult ecological settings could have been a driver at different times for behavioral adjustment, large scale displacement, increased interactions between populations and diffusion of technological innovations
Where to go and what to eat... When you are just born. Feeding behaviour of four bottlenose dolphin newborns in Rimini Delfinario
No full textFunzionari e oligarchi: cancellieri e segretari a Genova in età moderna
No full textLa burocrazia della repubblica di Genova nell'età moderna è stata poco studiata. Il contributo si propone di evidenziare la trasformazione dello status del notaio all'interno del ceto dirigente genovese nel corso del Cinquecento e il suo ruolo nella amministrazione della repubblica e del Banco di San Giorgio sino alla fine del Settecento, evidenziando l'iniziale osmosi del notarato con il ceto patrizio e la formazione di dinastie di cancellieri e segretari occasionalmente ascritte al patriziato sino al Settecento. Nell'ultima fase della repubblica oligarchica emersero invece attriti sempre più evidenti tra patrizi e notai-burocrati, anche se il sistema di reclutamento dell'amministrazione genovese non cambiò sino alla fne dell'Antico regime
Bolognina, Bologna
No full textLavoro interdisciplinare (sociologia, urbanistica, antropologia) sulle periferie di quattro città italiane
Lavoro in cui le ricerche etnografiche dialogano con rappresentazioni visiv
Conductance of meandering wires
No full textIn the past years a strong attention has been focused on the optical and transport properties of semiconductor hetero-structures owing to the possibility of tailoring material parameters such as the electron effective mass and the band gap, by changing the structure parameters. Recent experimental results on In(x)Ga(1-x)As structures cannot be explained in the framework of standard theoretical and simulative approaches for the description of carrier transport in quantum wells. In order to get a better insight of the effect of the surface roughness on the conductance, we have considered meandering quantum wires and have computed their coherent transport characteristics. We find that, at low energies, the transmission coefficient is strongly dependent on the SR parameters. The dependence of the conductance upon length of the device is also analyzed
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
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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