scholarly journals The Benefits of 3D and 4D Synthesis of Marine Geophysical Datasets for Analysis and Visualisation of Shipwrecks, and for Interpretation of Physical Processes over Shipwreck Sites: A Case Study off Methoni, Greece

2021 ◽  
Vol 9 (11) ◽  
pp. 1255
Author(s):  
Panagiotis Gkionis ◽  
George Papatheodorou ◽  
Maria Geraga
Keyword(s):  
Temporal Integration ◽  
Three Dimensional ◽  
Physical Processes ◽  
Data Synthesis ◽  
Digital Reconstruction ◽  
Structure State ◽  
True Position ◽  
Spatio Temporal ◽  
Complex Geology

Through the study of three wreck sites over the Methoni Bay (Greece), this article presents the benefits of spatio-temporal integration and correlation of marine geophysical data in a common three-dimensional (3D) geographical platform for analysis, and visualisation of shipwreck ruins and for interpretation of physical processes over wreck sites. The integration of 3D datasets has been proven to support identification of archaeological features over and under the seafloor, evaluation of the wreck structure state, and assessment on the wrecking event and the wreck site arrangement at that time, due to interactive cross-examination of datasets acquired in separate planes. Data synthesis is fundamental for 3D digital reconstruction of scattered and partially buried shipwreck ruins in complex geology as every dataset acts as interpretive and complimentary to each other. It is also shown that data synthesis highlights the signatures of physical processes over the wreck sites, and the interaction between the processes and the shipwrecks. The analysis of spatio-temporal, four-dimensional (4D) integrated datasets has proved to provide knowledge on the wreck site evolution through time, and highlights the disturbance of underwater archaeological resources due to human activities. The study has also shown that the creation of a shoalest depth true position bathymetric surface supports the realistic 3D wreck representation over the seafloor.

Digital Reconstruction of Demolished Architectural Masterpieces, 3D Modeling, and Animation

2019 ◽  
pp. 206-241
Author(s):  
Roberta Spallone
Keyword(s):  
Case Studies ◽  
3D Modeling ◽  
Three Dimensional ◽  
Horse Racing ◽  
Three Dimensional Reconstruction ◽  
Digital Reconstruction ◽  
Methods And Techniques ◽  
Dimensional Reconstruction ◽  
Critical Approaches

This chapter reviews methods and techniques of digital reconstruction of disappeared architectural masterpieces. Through the overview of theoretical positions are explored heuristic values and communicative potentials of three-dimensional reconstruction, and prerogatives of animation in the interaction with three-dimensional data. Different critical approaches related to the architectures remained on paper are then brought to light. The examination of several case studies, also personally conducted, is extended to unbuilt architectures and minor architectures subject to demolition or transformation in order to highlight the different strategies used for the preservation of the memory of such heritage. Finally, the case study of Turin Horse-Racing Society Building by Carlo Mollino is extensively presented through the analysis of contemporary critical bibliography concerning the project, a description of archival sources and illustration of methods and techniques of the digital reconstruction.

Digital Reconstruction of Demolished Architectural Masterpieces, 3D Modeling, and Animation

2015 ◽  
pp. 476-509 ◽  
Author(s):  
Roberta Spallone
Keyword(s):  
Case Studies ◽  
3D Modeling ◽  
Three Dimensional ◽  
Horse Racing ◽  
Three Dimensional Reconstruction ◽  
Digital Reconstruction ◽  
Methods And Techniques ◽  
Dimensional Reconstruction ◽  
Critical Approaches

This chapter reviews methods and techniques of digital reconstruction of disappeared architectural masterpieces. Through the overview of theoretical positions are explored heuristic values and communicative potentials of three-dimensional reconstruction, and prerogatives of animation in the interaction with three-dimensional data. Different critical approaches related to the architectures remained on paper are then brought to light. The examination of several case studies, also personally conducted, is extended to unbuilt architectures and minor architectures subject to demolition or transformation in order to highlight the different strategies used for the preservation of the memory of such heritage. Finally, the case study of Turin Horse-Racing Society Building by Carlo Mollino is extensively presented through the analysis of contemporary critical bibliography concerning the project, a description of archival sources and illustration of methods and techniques of the digital reconstruction.

Space, Place and Digital Media: Towards a Better Simulation of a City that has now Disappeared

2003 ◽  
Vol 1 (1) ◽  
pp. 112-129 ◽  
Author(s):  
Yu-Tung Liu ◽  
Shen-Kai Tang
Keyword(s):  
Digital Media ◽  
Three Dimensional ◽  
Reconstruction Procedure ◽  
Virtual Archaeology ◽  
Digital Reconstruction ◽  
Visual Spatial ◽  
Data Collection And Analysis ◽  
Historical Architecture ◽  
Architectural Restoration

Digital media enable researchers and designers to derive better informed processes in solving problems of historical architectural restoration and virtual archaeology. However, recently insufficiencies have been found in the main technologies often applied in such techniques, such as 3D modeling, high-quality rendering and animation. Given these problems, this paper attempts to explore a digital reconstruction procedure for historical architecture and cities using 3D scanning, Virtual Reality cave technology and motion capture technology. This case study is based on a collaborative project in conjunction with the National Palace Museum, Taiwan, and the China Times, Taiwan. The five steps involved in this project include data collection and analysis, three-dimensional digital inferences, digital reconstruction of static and moving models, scenario dynamics (by integrating the two kinds of models), and visual-spatial immersion using a VR-cave representation. Finally, a preliminary digital reconstruction procedure is presented.

Construction of plastic contact deformation maps on ceramics: a case study on aluminum nitride

1996 ◽  
Vol 54 ◽  
pp. 636-637
Author(s):  
D. L. Callahan
Keyword(s):  
Plastic Deformation ◽  
Aluminum Nitride ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Bright Field Image ◽  
Perfectly Plastic ◽  
Contrast Analysis ◽  
Deformation Patterns

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.

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