Methodology for characterising microlayers in historical plasterwork

The study of (micro)layer structure in walls is a fundamental tool for expanding our knowledge of historical buildings and developing suitable proposals for intervention and restoration. In materials such as plasterwork, the (micro)layer sequence can be confusing, resulting in the need for a more detailed analysis in order to accurately determine the materials and interventions carried out on a given decorative element in the past. This work presents a methodological proposal based on optical microscopy, XRD, micro-XRD, SEM-EDAX, FTIR, and 14C dating to accurately identify the structure and composition of the different types of microlayers comprising the plasterwork. The resulting data are of great use in decision-making for restoration and can be compared with historiographic information in order to confirm hypotheses or clarify gaps in chronological adscription

Monomial discrete valuations in k[[X]]

Let v be a rank m discrete valuation of k[[X1,...,Xn]] with dimension n-m. We prove that there exists an inmediate extension L of K where the valuation is monomial. Therefore we compute explicitly the residue field of the valuation

Reconfiguring global value chains in a post-Brexit world: A technological interpretation

[EN]With the uncertainties that it may entail in terms of possible trade barriers between the UK and the EU, increased exchange rate risk, restrictions on the establishment of professionals and possible changes in regulations on the environment, tax and protection of competition, Brexit could exacerbate the process of re-localisation of operations that commenced to a small extent some years ago. This process was based on technological innovations under the heading of Industry 4.0, and more recently strengthened by the supply problems that came to light during the handling of the Covid-19 pandemic. Although the social, political and institutional context matters a lot, we believe that technology is going to be a conditioning element in the ability of businesses to reconfigure the value chains in which they are involved. We propose a typology based on this technological perspective that could have considerable potential impact in defining business strategies in numerous industries and in orienting industrial policy in countries striving to acquire a more central role or to prevent themselves from being cut out of the global value chain.The authors acknowledge research funding from University of the Basque Country (UPV/EHU) : Grant GIU19/078

Conceptual and symbolic changes in rural societies: the ethnographic letter as a regulator

The livelihoods of traditional rural societies are in an open process of disappearing. Under this premise we started to work and propose a research project on rural landscape architecture, environmental awareness and issues of administrative regulation. This work would serve us to study, learn, document and investigate in depth from an ethnological point of view, a rural culture represented by some populations in the north of the region of La Ramajería; region that is located in the northwest of the province of Salamanca . We propose in our research ethnological a sample letter to serve as a reference when analyzing the administrative documentation of these goods, without it being exclusive of other possibilities, but willing at all times and as a priority objective, to promote discussion of different methods or possibilities that may develop in this area.Los modos de vida de las sociedades rurales tradicionales se encuentran en un franco proceso de desaparición. Bajo esta premisa empezamos a trabajar y planteamos un proyecto de investigación sobre la arquitectura del paisaje rural, el conocimiento del medio y la problemática de su regulación administrativa. Este trabajo nos serviría para estudiar, conocer, documentar e investigar en profundidad, desde un punto de vista etnológico, una cultura rural representada por algunas poblaciones del Norte de la comarca de La Ramajería; región que se localiza en el Noroeste de la provincia de Salamanca. Proponemos en nuestra investigación un ejemplo de carta etnológica que sirva como referencia a la hora del análisis de la catalogación administrativa de estos bienes, sin que ello sea excluyente de otras posibilidades, pero queriendo en todo momento y como finalidad prioritaria, fomentar la discusión sobre los distintos métodos o posibilidades que se pueden desarrollar en este tema

A multi-FPGA distributed embedded system for the emulation of Multi-Layer CNNs in real time video applications

This paper describes the design and the implementation of an embedded system based on multiple FPGAs that can be used to process real time video streams in standalone mode for applications that require the use of large Multi-Layer CNNs (ML-CNNs). The system processes video in progressive mode and provides a standard VGA output format. The main features of the system are determined by using a distributed computing architecture, based on Independent Hardware Modules (IHM), which facilitate system expansion and adaptation to new applications. Each IHM is composed by an FPGA board that can hold one or more CNN layers. The total computing capacity of the system is determined by the number of IHM used and the amount of resources available in the FPGAs. Our architecture supports traditional cloned templates, but also the (simultaneous) use of time-variant and space-variant templates.This work has been partially supported by the Fundación Séneca de la Región de Murcia through the research projects 08801/PI/08 and 08788/PI/08, and by the Spanish Government through project TIN2008-06893-C03

Multi-thread impact on the performance of Monte Carlo based algorithms for self-localization of robots using RGBD sensors

Abstract—Using information from RGBD sensors requires huge amount of processing. To use these sensors improves the robustness of algorithms for object perception, self-localization and, in general, all the capabilities to be performed by a robot to improve its autonomy. In most cases, these algorithms are not computationally feasible using single-thread implementations. This paper describes two multi thread strategies proposed for self localize a mobile robot in a known environment using information from a RGBD sensor. The experiments will show the benefits obtained when different numbers of threads are compared, using different approaches: a pool of threads and creation/destruction scheme. The work has been carried out on a Kobuki mobile robot in the environment of the RoCKiN competition, similar to RoboCup@hom

Plasterwork in the Ambassadors Hall (Salon de Embajadores) of the Real Alcazar of Seville (Spain): Graphic reconstruction of polychrome work by layer characterization

This work examines a polychrome plasterwork in one of the most important scalloped arches in the Ambassadors Hall (Salón de Embajadores), which is the most outstanding room in the Mudéjar Palace of the Real Alcázar of Seville (Spain). Characterization by stratigraphy, XFR, XRD, and FTIR studies has supplied data on changes in the composition and colors in this building element. The research is complemented with historical information on the most significant interventions in this hall. Graphic analysis and the modeling of decorative geometric elements in 3D with BIM software were used to simulate its evolution from its original state. The results characterize the base plasterwork and the polychromies constituted by 1–3 microlayers with a thickness between 5 and 300 lm, formed of blue (19.88% Cu-azurite), vermilion (19.00% Pb-massicot and 5.34% Hg-cinnabar), and golden layers (68.93% Au). The colors were obtained through the use of mineral pigments such as azurite, cinnabar-litharge, and gold-leaf, respectively. The rich colors visible in this hall now have varied over time

Reflexiones sobre la evaluación de los sistemas de recuperación de información: necesidad, utilidad y viabilidad

The evaluation of Information Retrieval Systems has been developed parallelly to their evolution for reasons of scientific nature, generating the appearance of a great number of proposals to make this process. Assuming that all these proposals - most of which they appear in this work- try to look for a robust mechanism to measure the effectiveness of Information Retrieval Systems, it is not less certain information retrieval is a complex problem to resolve, due to the inherent problems related with translating the user’s information needs to a formalized expression search. The implementation of an objective and simple method to evaluate the effectiveness is the axis where the scene of the evaluation of the information retrieval gravitates