121 research outputs found
New archaeological investigation in the sun temple of Niuserra in Abu Ghurab
No full textThe article presents the results of the first field-works in the temple of Niuserra at Abu Ghurab more than one hundred years from the discovery and publication of the temple by Borchardt. The sun temple built by Niuserra is the only one, out of the six temples known from the epigraphic sources, greatly preserved and whose structures are still recognizable. This new investigation is not based on new excavations of the temple but rather on a re-evaluation of the archaeological data still available on the site as well as an attempt to clarify the architectural and functional features of some of the structures and to suggest a new, revisited plan of the temple itself by means of the modern topographical and technological instruments.
In this sense, attention has been particularly focused on the general measurements of the temple made by Borchardt and on some specific areas like, above all, the obelisk and the so-called “magazines” whose architectural layout and symbolical value seem to have been sometimes misinterpreted by the German scholar. After two archaeological campaigns it was possible to ascertain that, although Borchardt’s work in the temple still remains a key-point in the understanding and comprehension of the architectural features of such kind of religious buildings, many interesting archaeological data still need further, accurate investigation
Epigraphic Documents from Mersa Gawasis: a Reassessment
No full textThe author presents some considerations on the different typologies of stelae discovered at Mersa Gawasis, the Middle Kingdom harbour on the Red Sea, and on their spatial and chronological distribution. Analyses of these data provide information both on the history of the site and on the evolution of the use of private stelae during the Middle Kingdom.
On the base of the data presented in the paper, a new criterion is suggested also for chronological collocation of MK stelae, erected in sites connected to economic and trade activities, rather than in funerary and religious contexts.
The effects of the administrative reorganization of the country on the Egyptian society and on its religious life – by the half of 12th dynasty - are identified among the most significant reasons of these changes
Tactical and operational city logistics: freight vehicle flow modeling
No full textThis paper first classifies city logistics measures that city administrators can use to reduce the negative impacts of urban freight transport, in relation to planning (i.e. strategic and tactical/operational). The focus then shifts onto models developed to support the assessment of tactical and operational measures. The assessment procedures require the simulation of freight transport demand and hence the estimation of freight vehicle origin-destination (O-D) flows. These O-D flows can be obtained from the simulation of delivery tours. Therefore, the paper presents a system of models able to simulate delivery tours using an aggregate approach. Such models allow us to capture actors’ choices which can be influenced by tactical and operational measures. They were calibrated and tested using the surveys carried out in the inner area of Rome, where more than 500 truck drivers were interviewed. Some results of the validation of the models are also presented
A BIM APPROACH FOR THE ANALYSIS OF AN ARCHAEOLOGICAL MONUMENT
No full textIn 2010 an Italian team started new on-field investigations in the area of the Sun Temple of Niuserra, 6 km south of the pyramids of Giza. The archaeological research was planned to re-examine the monument after its discovery in 1898. The work was mainly aimed at a general evaluation of the archaeological structures, still visible, in order to establish an updated plan of the temple. More than 100 scans and several 3D models by close-range photogrammetry have been acquired, processed and integrated to virtually reconstruct the archaeological area.To manage all available 3D datasets, allowing to propose new hypothesis about the monument, a BIM has been developed. Thanks to this approach different categories of environmental and technological objects have been created and analysed. The paper deals with the recent achievements, especially regarding the hierarchical conceptualisation of the architectural components. In particular, the contribution dwells on the analysis of the monument starting from the identification of a parametric library built on the semantic decomposition of the 3D replica.</p
Distribuzione urbana delle merci tramite ferrovia regionale: un’applicazione test nella penisola Sorrentina
No full textIn questa nota è affrontato il problema della distribuzione delle merci utilizzando per l’accesso all’area metropolitana le presenti infrastrutture ferroviarie. È descritta una metodologia per l’analisi della fattibilità tecnico-economica del sistema di progetto che prevede la messa a punto di un sistema di modelli per la stima della domanda merci di prodotti finali; è sinteticamente descritta l’applicazione alla penisola Sorrentina
Real-time freeway network traffic survellance: large-scale field testing results in Southern Italy
No full textAn adaptive freeway traffic state estimator
No full textReal-data testing results of a real-time nonlinear freeway traffic state estimator are presented with a particular focus on its adaptive features. The pursued general approach to the real-time adaptive estimation of complete traffic state in freeway stretches or networks is based on stochastic nonlinear macroscopic traffic flow modeling and extended Kalman filtering. One major innovative aspect of the estimator is the real-time joint estimation of traffic flow variables (flows, mean speeds, and densities) and some important model parameters (free speed, critical density, and capacity), which leads to four significant features of the traffic state estimator: (i) avoidance of prior model calibration; (ii) automatic adaptation to changing external conditions (e.g. weather and lighting conditions, traffic composition, control measures); (iii) enabling of incident alarms; (iv) enabling of detector fault alarms. The purpose of the reported real-data testing is, first, to demonstrate feature (i) by investigating some basic properties of the estimator and, second, to explore some adaptive capabilities of the estimator that enable features (ii)-(iv). The achieved testing results are quite satisfactory and promising for further work and field applications. (C) 2008 Elsevier Ltd. All rights reserved
Real-time freeway network traffic surveillance: large-scale field testing results in Southern Italy
No full textThis paper reports on some large-scale field-testing
results of a real-time freeway network traffic surveillance tool that
has recently been developed to enable a number of real-time traffic
surveillance tasks. This paper first introduces the related network
traffic flow model and the approaches employed to traffic state
estimation, traffic state prediction, and incident alarm. The field
testing of the tool for these surveillance tasks in the A3 freeway
of 100 km between Naples and Salerno in southern Italy is then
reported in some detail. The results obtained are quite satisfactory
and promising for further future implementations of the tool
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