extended matrix
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2021 ◽  
Vol 10 (1) ◽  
pp. 18
Author(s):  
Simone Berto ◽  
Emanuel Demetrescu ◽  
Bruno Fanini ◽  
Jacopo Bonetto ◽  
Giuseppe Salemi

In this work, we will describe the application of the Extended Matrix Framework (EMF) to the 3D reconstruction of the temple on the Roman forum of Nora. EMF represents a specific section of the Extended Matrix (EM) method, developed by the VHLab of the CNR ISPC (Rome), dedicated to the development of software solutions for 3D data management in the field of virtual reconstruction. The combination of EM and EMF allows to: map the reconstructive process, validate the entire workflow (from data ingestion to 3D modelling), manage 3D data, and share outcomes online.


2021 ◽  
Author(s):  
Riley Llewellyn Hanick

This essay will situate Erica Baum’s Dog Ear within broader discussions of appropriation, remediation, and queer phenomenology.  In her ongoing series, begun over a decade ago, Baum makes the quotidian act of folding the corner of a book’s page into a sculptural intervention, allowing her to “reauthor” the newly concealed and revealed juxtaposition of text.  These digital photographs, initially displayed in art galleries, were selectively sequenced by Baum to become Dog Ear (Ugly Duckling Presse 2011, reprinted 2016).  Both the accompanying critical writings and subsequent reviews of the book emphasized continuities between Baum’s project and traditions of found and concrete poetry, alongside modernist precursors like Malevich and Albers who informed her visual lexicon.  While acknowledging these legacies, my essay focuses on the evident limitations of attempts to render Baum’s works using standard and modified modes of lineation (offered by Kenneth Goldsmith and Amaranth Borsuk, respectively) which consistently evacuate what is most compelling about them.  Instead, I propose and demonstrate a method of gestalt poetics, one which lets their circuitous, open-ended dimensions register more fully by emphasizing evocative recombination, adjacency, and the interrelation of these remediated pages as they return back to and contort the codex.  Textual figures get produced, as Sara Ahmed has argued “by acts of relegation” and their queerness, in Baum’s work, depends on perpetually destabilizing the bifurcation between reading and looking in order to shift our sense of foreground and background into an extended matrix of partial legibilities. 


2021 ◽  
Vol 11 (11) ◽  
pp. 5206
Author(s):  
Emanuel Demetrescu ◽  
Daniele Ferdani

This article is framed into the theoretical and methodological background of virtual archaeology. The advantages of virtual archaeology and its weak points have long been discussed in academia, formulating theoretical foundations and principles to be followed in order to guarantee scientific results, where data are traceable, transparent and verifiable. Gathering the inheritance of the last 30 years of debates and research, this work proposes implementing these principles through the formulation of a methodological approach, to virtual reconstruction of archaeological contexts, consisting of an application protocol articulated in five steps. In particular, the proposed methodology is grounded in the Extended Matrix (EM), a formal language and tools entirely developed and tested by the Virtual Heritage lab of the CNR ISPC. The EM takes its cue from the Matrix of Harris and adapts its system to the specific needs arising in the fields of virtual reconstruction and scientific visualisation. This protocol, which ranges from fieldwork to the publication of scientific data, has been tested and systematised in over ten years of activity on various complex and significant archaeological contexts. In the article, each methodological step is supported by case studies described in detail and accompanied by a graphic apparatus that clearly illustrates the results obtained. These case studies led to the definition of version 1.2 of the EM as described in the methods section.


2020 ◽  
Vol 106 ◽  
pp. 113582
Author(s):  
Felipe Silva ◽  
Walter Freitas ◽  
Jarbas Silveira ◽  
César Marcon ◽  
Fabian Vargas

Author(s):  
Yu.R. NIKITIN ◽  
S.A. TREFILOV

This paper presents the results of a study of the influence of the technical condition of mobile robot drives on the identifiability criterion. A discrete robot model has been developed with optimal drive control. The results of computational experiments are presented, confirming the hypothesis of a nonlinear dependence of the determinants of the expanded state matrix and measurements in the robot model, significantly affecting its control. The identification criterion of the robot as a determinant of an expanded state matrix consisting of a combination of a state matrix and a measurement matrix is considered. An algorithm is proposed for calculating the identifiability criterion for a nonlinear control model in the discrete linearization version. It is proposed to use identification in terms of matching the mathematical model with the results of the operation of the robot. The information-measuring system at each sampling step measures the position vector, the speed of the robot and electric currents, the angular speeds of rotation of the drives at the current point of the robot path and calculates the state matrix. Therefore, at each step, the degree of proximity of the extended matrix to the loss of rank is calculated, at which the identifiability of the robot control model is still observed. The degree of proximity to the loss of identifiability is calculated by the minimum determinant of matrices. This minimum determinant is calculated as a threshold for making decisions about the technical condition of the drives of a mobile robot. The loss of identifiability of the extended matrix may be due to defects in drives or sensors and used for the diagnostic system of the robot.


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