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    Opere difensive trecentesche nella Repubblica di Genova

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    Defensive walls of the 14th century in the Republic of Genoa. Recent investigations on the remains of the fortified system of Monterosso, in the Cinque Terre, have made it possible to date one of the half tower of the defensive enclosure to the fourteenth century. A second tower, that was originally a half tower with a U-shape, could be traced back to the same time, given its constructive similarities. In this period new defensive walls were erected in other settlements of the ancient Republic of Genova. The walls of Levanto, built in the second half of the thirteenth century, perhaps were reinforced or partially constructed at the beginning of the following century. In La Spezia, the Castle of San Giorgio and the walls surrounding the village were built on the occasion of the establishment of the Podestaria (1371). In Genoa itself, the two suburbs outside the walls known as walls of Barbarossa (1158) were surrounded by walls in the fourteenth century. Nothing of them is preserved, but we have interesting information thanks to the archival documents, that illustrate the construction features of the western part, equipped with towers, battlements and crossbows. The contribution addresses for the first time this poorly studied chapter in the history of Genoese fortifications, trying to compare the stonemasonry techniques and the building typologies that distinguish them

    Optimization of the liquor distribution in yarn package dyeing by CFD

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    The aim of this work was to simulate the fluid flow in the spindle-bobbin system using computational fluid dynamics (CFD). In the frame of a wider project finalized at dyeing machinery diagnostics, the CFD simulations in the distribution apparatus offer an interesting tool to investigate various spindle geometries and choose the best structure afore of designing industrial scale dyeing equipment. The flow behaviour has been predicted using the k-e model in the commercial CFD package of Fluent 6.2

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The 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
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