1,721,092 research outputs found
Il palazzo arcivescovile di Palermo, da Simone Beccadelli a Giovanni Paternò. Storia e ricostruzione della configurazione quattrocentesca
No full textIn the fifties of the fifteenth century, the archbishop of Palermo Simone Beccadelli started the construction of a new archbishop’s palace in an area between the upper stretch of the ancient Cassaro road and the churchyard created along the southern side of the cathedral, whose arrangement had engaged his predecessors since the thirties of the same century. The architectural undertaking, driven by the primary need to create a residence suitable for the rank of the Palermo archibishop’s chair, therefore also assumes a strong urban significance, helping to define the same space of the churchyard and the monumental cathedral complex as a whole. If a first campaign of works would seem to be concluded by the sixties of the fifteenth century, further significant interventions are recorded at the end of the same century on commission of Archbishop Giovanni Paternò. Although substantial transformations and additions, carried out especially between the end of the sixteenth and eighteenth centuries, have profoundly altered the volume and the original organization of the building, several elements (portal, a mullioned window, single lancet windows) and some fragments still allow us to hypothesize about its configuration in fifteenth century, starting from concrete data and clues. This contribution proposes, through the interaction between the usual tools of historical-critical investigation and those of drawing and digital modeling, to carry out a reconstructive hypothesis of the fifteenth-century building (in particular of its eastern front) and a critical framing of the same, in relation to its historical-artistic context
Optimisation of a sensor cluster for supersonic object trajectory and velocity determination
No full textAn evaluation of errors for a method for determination of trajectories and velocities of supersonic objects is conducted. The analytical study of a cluster, composed of three pressure transducers and generally used as an apparatus for cinematic determination of parameters of supersonic objects, is developed. Furthermore, detailed investigation into the accuracy of this cluster on determination of the slope of an incoming shock wave is carried out for optimization of the device. In particular, a specific non-dimensional parameter is proposed in order to evaluate accuracies for various values of parameters and reference graphs are provided in order to properly design the sensor cluster. Finally, on the basis of the error analysis conducted, a discussion on the best estimation of the relative distance for the sensor as a function of temporal resolution of the measuring system is presented
Using experimental modal analysis principles to evaluate the dynamics of catheter transducer system in invasive-pressure measurements
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Metodi per la ricostruzione virtuale e la visualizzazione di opere d'architettura perdute
Full text linkDigital technologies for architecture representation have strongly modified uses and rules inherited from a millennial tradition. In the initial development period CAD tools worked as electronic drafting machines and digital drawings were almost similar to hand-made drawings; plans, fronts, sections and the like.
In this period perspective and axonometric drawings were rarely executed because architects realized that these drawings had to be substituted by 3D digital models views, but modeling tools were not so familiar to professionals, both for software and hardware limitations.
The evolution of architecture digital representation is still in progress, but it is possible to outline a precise direction that moves towards the death of drawing; the task of visualization of buildings and architecture design will be accomplished by 3D digital models.
Digital representations of complex architecture scenarios have been successfully performed for entertainment purposes by the film industry; the settings of outstanding movies as Gladiator and Troy are the result of sophisticated 3D reconstructions.
Virtual reconstructions have been widely used to enrich the experience of visit of archaeological sites in the past two decades
From the “Sacred Theatres” of Andrea Pozzo to the International Truncated Calotte: History and Representation of the Immacolatella Church’s Tribune in Trapani (1732)
No full textThe contribution, divided between history and representation, aims to analyse the design genesis and the sources used by the architect Giovanni Amico for the modernization of the Immacolatella church’s tribune in Trapani (since 1732). The church is devoid of studies and surveys with digital instrumentation but its unique compositional characteristics, which exploit the theme of the manipulation of space and light for scenographic and liturgical purposes, require in-depth analysis. The solution applied to the church tribune combines different compositional themes linked to the Roman design world and in particular by Andrea Pozzo in relation to the “sacred theatres” produced for the Jesuits and known through the engravings of his famous treatise. The structure is complicated by a truncated apse basin and an ambulatory behind the altar that follows the irregularities of the available space. The present research has revealed the multiple sources combined by Amico in the project, while the digital modelling operations have made it possible to specify the compositional dependencies and to grasp the complexities of the project. A rich ornamental apparatus that dominates the structure, not exempt from further references to the Roman world, completes the theatrical effect of the composition
Multi sensor photogrammetric techniques for the documentation of the ruins of Temple G in Selinunte
No full textIn the past two decades UAV have been increasingly used for the survey of wide areas. The chosen case study, the huge heap of ruins of the Temple G in Selinunte, demands a higher accuracy than that usually accepted for wide areas survey; nonetheless, the morphology of the ruins makes laser scanning survey inadequate to the purpose of the analysis and interpretation. The proposed methodology integrates SfM photogrammetry from UAV and action camera’s photos. A test on a specific area has evaluated the accuracy of photogrammetric survey through the comparison with laser scanning data
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
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