A Remotely Controlled Calibrator for Chemical Pollutant Measuring-Units

The increasing diffusion of pollutant measuring units, which are installed over wide areas, along with the short calibration interval of several sensors for pollutant quantities, requires new calibration infrastructures to be developed. This paper describes an attempt to develop an innovative calibration system which is based on traveling standards and which does not require units to be removed from the measuring site during the calibration process. The calibration system is based on a traveling standard, which is composed of one or more cylinders that contain gas mixtures, a cell with standard sensors, and a control unit with networking capabilities, which allows the traveling standard to be remotely exercised. A prototype of the proposed system is described and the preliminary results reporte

Noninvasive Solution for Electrochemical Impedance Spectroscopy on Metallic Works of Art

Metallic works of art of cultural relevance are continuously subjected to corrosion as the environment becomes increasingly polluted. A fast and simple method to in situ assess the conservation conditions is therefore required. This paper describes the development and performance of dry and gel-based electrodes which can be used to assess the surface conservation state without the need to move the artifacts and which do not cause any damage to them. The electrodes can be used with a portable electrochemical impedance spectroscopy system, without employing electrochemical cells. The proposed solution does not provide all the information that one can obtain using an electrochemical cell, but it can discriminate between protective coatings. It can be used to assess the protective capability of corrosion product layers and natural patinas, and it can therefore enable a noninvasive routine surface assessment to be conducted that could be extremely useful for people working in the field of conservation of cultural heritag

Introduction:lieux de savoir and archéologie du savoir

The introduction to this special collection addresses a fundamental issue: the link between savoir/knowledge and the spatial turn in the humanities. This point, which will be the connecting thread of the articles to be published in the collection, is addressed and discussed through an analysis of two books that have significantly influenced theoretical reflection in the mentioned field: Michel Foucault's L'Archéologie du savoir (1969) and Christian Jacob's Qu'est-ce qu'un lieu de savoir? (2014). Keeping in mind the theoretical developments of the past half century, the introduction will look back on Foucault's concepts in order to see how they can be re-read in the light of recent developments in the spatial humanities and in particular in connection with the concept of lieux de savoir and the history of (religious) reading and knowledge transfer in medieval and early modern culture

Writing as a Religious Lieu de Savoir

Taking its start from the analysis of the notion savoir-pouvoir in Foucault's philosophical work, the article discusses the applicability of the concept lieux de savoir in the study of writing activities in late medieval France and Italy performed by non-professional vernacular scribes. The act of copying a text is evaluated as an active contribution to the dissemination of religious texts. It is approached as a social act and process, which creates a communication circuit facilitating the flow of information within a textual community created by the very same act of writing. The approach to lieu de savoir as an activity, in which a process-oriented methodology is preferred to a material one, paves the way for new applications of the concept, in which the spaces, the objects and the actors are studied in a continuous exchange and dynamic

Dutch, Spanish and Portuguese maps in the collections of the Grand Duke Cosimo III de’ Medici

UID/HIS/04666/2019«Through the lenses of Dutch, Portuguese and Spanish cartography and landscapes gathered in the cartographic collection of Cosimo III de' Medici, the project The Global Eye reconstructs how connected global world of the mid-17th century was taking shape and reveals a remarkable circulation of men and knowledge between the Netherlands, Portugal and Tuscany during the modern era.»publishersversionpublishe

Introduction

UID/HIS/04666/2019publishersversionpublishe