1,354,100 research outputs found
Performance of absorption columns equipped with low pressure drops structured packings
No full textDuring the past few years the industry has demanded structured packings with higher and higher efficiency and with lower and lower pressure drops. Using these internals significant improvements were obtained in the absorption process but also in direct-contact heat transfer. In the present work a new type of packing is investigated both experimentally and theoretically to evaluate gas and liquid mass transfer coefficients, surface area available for mass transfer, and pressure drops. The experimental performances of the packing are tested in absorption and desorption systems to identify relations that allowing reliable design
Landscape Archaeology in Pisa and the POPULUS Project: Paying Attention and Being Selective
No full textROCOPOT (ROman COmmonware POTtery) Dataset
No full textA total of 2475 B/W images of Roman pottery profiles from 11 catalogues
(refined with 231 Bases, 278 Handles, 2103 Rims and 248 Rims with handles).
An .xls file containing asoociated metadata is included.
Reference webpage: https://mach.maths.cam.ac.uk/datasets/rocopot/
Associated publication:
S. Parisotto, A. Launaro, N. Leone and C.-B. Schönlieb. Unsupervised clustering of Roman pottery profiles from their SSAE representation. (ArXiv
New archaeological perspective of late antique Aquileia
No full textThe paper presents the results of an archaeological research project begun by the University of Verona in 2018 in the south-eastern sector of Aquileia. The area had already been partially excavated in the 1950s by Giovanni Battista Brusin, who identified a large commercial complex, as well as two parallel fortification walls, running along the north bank of the river Natissa
Launaro, Alessandro (ed.). 2023. Roman Urbanism in Italy: Recent Discoveries and New Directions. Oxford: Oxbow Books; 979-8-88857-036-4 paperback £42.
No full textThis is a review of Roman Urbanism in Italy: Recent Discoveries and New Directions edited by Alessandro Launaro, published in 2023 by Oxbow Books
Researching on the margins:Landscape Archaeology in the Polcevera Valley
No full textSince the late 1980s the Laboratory for Ancient Topography of the University of Pisa has been carrying out archaeological surveys within the mountainous area of the Polcevera Valley (North Apennines, Central Liguria).
Towards an appraisal of the ancient history of this landscape it seemed clear that data retrieved from traditional survey approaches (i.e. site-recovery issues) and interpretations based on traditional material classes (i.e. Roman fine-wares) could only emphasise the marginal character of the Valley as related to Rome and its territorial expectations (in fact mirroring the general views expressed by ancient authors about Liguria). At the same time, an outstanding epigraphic source, the Sententia Minuciorum (117 BC), reported of Ligurian economic and social structures, surviving even along a major Roman road (the via Postumia, 148 BC) and preserving a specific way of life.
This paper aims to outlining the distinctive character of the Valley across Antiquity from a more embedded perspective, touching also on both the methodological and interpretative implications that researchers have to face in dealing with such a liminal - marginal landscape
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
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