Search results for "RECONSTRUCTION"
showing 10 items of 784 documents
La memoria fotografica dell’architettura : restituzioni prospettiche e ricostruzioni
2023
This book explores perspective restitution from photographs for the reconstruction of buildings and urban sites that no longer exist or have suffered many alterations over time. Digital drawing and modelling tools overcome many of the limitations that, in the past, made perspective restitution from photographs inaccurate and inconvenient. Traditional drawing tools made perspective restitution from photographs difficult, especially when vanishing points appeared at a great distance from the image frame. The results of perspective restitution were either 1D or 2D objects, i.e. points, segments, angles, planar figures and profiles, that were revolved into the picture plane. By contrast, digita…
From aerial survey to representation and visualization: the Temple G of Selinunte
2022
The paper reports the outputs of a research work focused on the segmentation of meshes generated from aerial photogrammetric survey, aiming at the implementation of a database integrated in a web-based Information System developed with 3D-Hop technology, that uses models as the access point to information data. Segmentation is a relevant topic in cultural heritage documentation, since it is the a pre-requisite for the development of systems that connect information data to 3D models. The chosen case study is the Doric Temple G of Selinunte, an archaeological site in southern Sicily. Temple G, one of the biggest Doric Temples of Magna Graecia, it is today a huge heap of ruins, probably due t…
A virtual reconfiguration of two destroyed neighborhoods in the Old Town of Palermo
2018
The proposed contribution deals with the topic of virtual three-dimensional reconstructions on an urban scale. The choice was oriented on significant samples of city portions that over the centuries have undergone substantial transformations or distortions: the aim is to reconstruct their history backwards, starting from the current survey and using the tools of virtual representation to reconfigure the forms of the past and tell their events. From here comes the idea to create, for pieces, a hypertextual study of the urban image of Palermo: the theme of the transformation of the city, of change and of complexity, opens up differentiated research paths. The hypertext choice was almost obvio…
Il restauro virtuale dei sistemi decorativi e studio ricostruttivo dell’insula
2018
Il presente contributo rientra nell’ambito di in una più vasta linea di ricerca denominata “Progetto Hierapolis Virtuale”, sviluppata a partire dal 2007 e finalizzata alla ricostruzione tridimensionale degli edifici della città. A differenza di altre ricerche condotte sui monumenti di Hierapolis, l’attuale studio riguarda solamente una singola fase edilizia dell’insula, relativa alla grande stagione monumentale di età protobizantina riferibile a un periodo posto tra il VI e la prima metà del VII secolo. Tale scelta è stata dettata unicamente dalla quantità e dalla qualità dei dati archeologici utili ad uno studio ricostruttivo il più possibile scientifico per contribuire ad una maggiore con…
HIGH-RESOLUTION PALAEONVIRONMENTAL RECONSTRUCTION OF ODP HOLE 963D (SICILY CHANNEL) DURING THE LAST DEGLACIATION BASED ON CALCAREOUS NANNOFOSSILS
2004
Abstract A palaeoenvironmental reconstruction of Ocean Drilling Program (ODP) Hole 963D (Sicily Channel) has been obtained on the basis of quantitative abundance fluctuations in the calcareous nannofossil assemblages. The studied hole is characterized by a very high sedimentary resolution and covers the last ca. 20 kyr. A new palaeoclimatic curve, based on the Gephyrocapsa muellerae/Upper Photic Zone (UPZ) group ratio, permitted the detection of the rapid climatic fluctuations that characterized the last deglaciation. Cold water masses occupied the Sicily Channel during the glacial period and the Younger Dryas, whereas they were generally warm during the Bolling–Allerod and the Holocene. An…
Reducing effects of aberration in 3D fluorescence imaging using wavefront coding with a radially symmetric phase mask.
2016
In this work, a wavefront encoded (WFE) imaging system built using a squared cubic phase mask, designed to reduce the sensitivity of the imaging system to spherical aberration, is investigated. The proposed system allows the use of a space-invariant image restoration algorithm, which uses a single PSF, to restore intensity distribution in images suffering aberration, such as sample–induced aberration in thick tissue. This provides a computational advantage over depth-variant image restoration algorithms developed previously to address this aberration. Simulated PSFs of the proposed system are shown to change up to 25% compared to the 0 µm depth PSF (quantified by the structural similarity i…
Size control of InAs∕InP(001) quantum wires by tailoring P∕As exchange
2004
The size and emission wavelength of self-assembled InAs∕InP(001) quantum wires (QWrs) is affected by the P∕As exchange process. In this work, we demonstrate by in situ stress measurements that P∕As exchange at the InAs∕InP interface depends on the surface reconstruction of the InAs starting surface and its immediate evolution when the arsenic cell is closed. Accordingly, the amount of InP grown on InAs by P∕As exchange increases with substrate temperature in a steplike way. These results allow us to engineer the size of the QWr for emission at 1.3 and 1.55 μm at room temperature by selecting the range of substrate temperatures in which the InP cap layer is grown.
YTTRIUM AND REE SIGNATURE RECOGNIZED IN CENTRAL MEDITERRANEAN SEA (ODP SITE 963) DURING THE MIS 6 – MIS 5 TRANSITION
2010
The Mediterranean Sea acts as a miniature ocean with the development of its own conveyor belt. It constitutes an ideal location to study and forecast how the marine environment responds to rapid climatic change. Here we present a palaeoenvironmental study carried out on the sediments of ODP Site 963, recovered in the Sicily Channel, the sill which divides the western from the eastern Mediterranean basin. We focused on the transition between the penultimate glacial (MIS 6) and the last interglacial (MIS 5), between approximately 130 and 115 kyr BP. A novel approach is proposed, taking into account centennial-scale geochemical data on major elements, selected trace elements, and yttrium and R…
Środowiska polskiej emigracji politycznej wobec odbudowy Zamku Królewskiego w Warszawie
2017
20 stycznia 1971 r. I sekretarz KC PZPR Edward Gierek podczas spotkania z przedstawicielami środowisk twórczych zapowiedział odbudowę Zamku Królewskiego w Warszawie. W Polsce decyzja o odbudowie przyjęta została z entuzjazmem i wyzwoliła wielką ofiarność społeczną. Odbudowa Zamku zapowiedziana przez nowego przywódcę partii komunistycznej wywołała jednak żarliwe dyskusje i spory w kręgach polonijnych. Znaczna część emigracji, zwłaszcza wywodząca się z politycznych elit, nie negując sensu i potrzeby odbudowy Zamku, jednego z symboli niepodległej Polski, dopatrywała się jednak koniunkturalnego i instrumentalnego charakteru decyzji władz PRL. Sprzeciw wywoływała szczególnie planowana zbiórka pi…
Toward a virtual reconstruction of an antique three-dimensional marble puzzle
2017
International audience; Abstract | Introduction | Related Work | Acquisition Setup, Proposed Prototype: Calibration and Visibility | Preprocessing of Scanned Three-Dimensional Fragment Data | Processing of Scanned Three-Dimensional Surface Data: Matching | Conclusion and Future Works | Appendices | Acknowledgments | ReferencesAbstract. The reconstruction of broken objects is an important field of research for many applications, such as art restoration, surgery, forensics, and solving puzzles. In archaeology, the reconstruction of broken artifacts is a very time-consuming task due to the handling of fractured objects, which are generally fragile. However, it can now be supported by three-dim…