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In the frame of a more sustainable approach to climate control, a long term strategy has been developed and is under advanced phase of implementation by technical staff of the University of Palermo in an important building, Palazzo Steri, owned by the University. The monumental room under climate control, the Sala dei Baroni (also known as Sala Magna), has a precious wooden ceiling where the previously loadbearing elements are covered with wooden painted panels. Many of them, painted in the fourteenth c, underwent important restorations in the past due to climate related damage (cracks, warpings, paint layer delamination) and biological infestations. The room is currently undergoing an important installation, using an HVAC system designed differently from the standard approach to climate control. The adopted design approach deals with the control of the air surrounding the wooden artifact as a function of the potential Equilibrium Moisture Content (EMC) that the panels could achieve. EMC is a synthetic parameter useful in correlating the response of panel paintings to climate fluctuations, and the behaviour of wooden objects may be better expressed as a function of EMC than to Relative Humidity (RH) fluctuations alone. Indeed, the correlation between a specified climate expressed with a parameter that takes into account both T and RH as experienced by wood is more correct. In this case-study the benefits of such an approach are even greater: due to the fact that it is possible to obtain the same EMC values with different combinations of Temperature and Relative Humidity values, the climate can be kept stable around the objects in the way the objects would feel it, meanings that the same EMC values (or hygro-mechanical stability of the artifacts) can be obtained in different seasons by adapting the Relative Humidity to the corresponding EMC value, letting the system free to follow the Temperature seasonal variations without compromising its stability.
Paolo Dionisi-Vici; Daniela Romano. An Original Approach to Active Climate Control Based on Equilibrium Moisture Content (EMC) as Set Point in a Middle-Age Building in Palermo, Italy. Conservation and Painting Techniques of Wall Paintings on the Ancient Silk Road 2019, 143 -164.
AMA StylePaolo Dionisi-Vici, Daniela Romano. An Original Approach to Active Climate Control Based on Equilibrium Moisture Content (EMC) as Set Point in a Middle-Age Building in Palermo, Italy. Conservation and Painting Techniques of Wall Paintings on the Ancient Silk Road. 2019; ():143-164.
Chicago/Turabian StylePaolo Dionisi-Vici; Daniela Romano. 2019. "An Original Approach to Active Climate Control Based on Equilibrium Moisture Content (EMC) as Set Point in a Middle-Age Building in Palermo, Italy." Conservation and Painting Techniques of Wall Paintings on the Ancient Silk Road , no. : 143-164.
In this contribution a new methodology of climate control, specifically designed for Cultural Heritage artifacts storage microenvironments, is presented. Standard conditioning systems work using the subtraction of vapor in the air by means of condensation on cold surfaces as a drying strategy and the addition of water vapor, obtained in different ways, to humidify the air. Temperature (T) and Relative Humidity (RH) are controlled by two different control loops. Using this new system, currently in patent pending status, it is possible to obtain a wide range of T and RH values circulating the air flow (via a common air circulation pump) through a water gurgling device and a heating device, using the ΔT between the water temperature in the gurgling device and the set temperature of the heating section. The system is very robust and straightforward: the sensible-latent transformation of the air flow in each one of the 4 possible directions (heating-drying, heating-humidification, cooling-drying, cooling-humidification) is obtained by two passages operated by only two devices (bubbler device + heating device) controlled by two temperature probes, one in the bubbler and one in the heating section. The system has been successfully implemented in some different case-studies in Italy and in the United States.
Ottaviano Allegretti; Paolo Dionisi-Vici. Technological improvements in creating controlled thermo-hygrometric conditions in sealed microenvironments:the Dew Point Climatic Generator. IOP Conference Series: Materials Science and Engineering 2018, 364, 012026 .
AMA StyleOttaviano Allegretti, Paolo Dionisi-Vici. Technological improvements in creating controlled thermo-hygrometric conditions in sealed microenvironments:the Dew Point Climatic Generator. IOP Conference Series: Materials Science and Engineering. 2018; 364 (1):012026.
Chicago/Turabian StyleOttaviano Allegretti; Paolo Dionisi-Vici. 2018. "Technological improvements in creating controlled thermo-hygrometric conditions in sealed microenvironments:the Dew Point Climatic Generator." IOP Conference Series: Materials Science and Engineering 364, no. 1: 012026.
Orange is a fruit of the Citrus genus in the family Rutaceae. It is assumed to have originated in southern Asia, and to have been first cultivated in China around 2500 BC. There is little knowledge on the quality of wood from orange trees, which is occasionally used in fine woodwork, tool handles, mosaics, and marquetry. This work aimed to evaluate the possibility of using orange wood from agricultural conversions and orchard plantation renewals to make products with a high value. Logs from plantations located in southern Italy were collected, and the key aspects for determining the suitability of using the wood as flooring were examined. Laboratory tests were carried out to determine the shrinkage, dimensional stability, and surface hardness, which included an indentation test on the wood flooring. Drying trials were also performed, and prototypes of flooring were prepared so professionals and end users could evaluate the aesthetic value. The results confirmed that the wood from orange trees is fine-grained, and is characterized by a high density and shrinkage, average dimensional stability, and high surface hardness. The results of the tests suggested performing careful drying and following specific procedures according to the size of the elements. The wood was highly appreciated by the users, which confirmed the possibility of using this wood as a renewable raw material, despite the limited availability, for manufacturing high-quality products.
Stefano Berti; Paolo Burato; Paolo Dionisi-Vici; Ottaviano Allegretti. Orange Wood for Parquet and Engineered Flooring Use. BioResources 2017, 13, 586-596 .
AMA StyleStefano Berti, Paolo Burato, Paolo Dionisi-Vici, Ottaviano Allegretti. Orange Wood for Parquet and Engineered Flooring Use. BioResources. 2017; 13 (1):586-596.
Chicago/Turabian StyleStefano Berti; Paolo Burato; Paolo Dionisi-Vici; Ottaviano Allegretti. 2017. "Orange Wood for Parquet and Engineered Flooring Use." BioResources 13, no. 1: 586-596.
Results from three years of continuous monitoring of environmental conditions using a wireless sensor platform installed at The Cloisters, the medieval branch of the New York Metropolitan Museum of Art, are presented. The platform comprises more than 200 sensors that were distributed in five galleries to assess temperature and air flow and to quantify microclimate changes using physics-based and statistical models. The wireless sensor network data shows a very stable environment within the galleries, while the dense monitoring enables localized monitoring of subtle changes in air quality trends and impact of visitors on the microclimate conditions. The high spatial and temporal resolution data serves as a baseline study to understand the impact of visitors and building operations on the long-term preservation of art objects.
Levente J. Klein; Sergio A. Bermudez; Alejandro G. Schrott; Masahiko Tsukada; Paolo Dionisi-Vici; Lucretia Kargere; Fernando Marianno; Hendrik F. Hamann; Vanessa López; Marco Leona. Wireless Sensor Platform for Cultural Heritage Monitoring and Modeling System. Sensors 2017, 17, 1998 .
AMA StyleLevente J. Klein, Sergio A. Bermudez, Alejandro G. Schrott, Masahiko Tsukada, Paolo Dionisi-Vici, Lucretia Kargere, Fernando Marianno, Hendrik F. Hamann, Vanessa López, Marco Leona. Wireless Sensor Platform for Cultural Heritage Monitoring and Modeling System. Sensors. 2017; 17 (9):1998.
Chicago/Turabian StyleLevente J. Klein; Sergio A. Bermudez; Alejandro G. Schrott; Masahiko Tsukada; Paolo Dionisi-Vici; Lucretia Kargere; Fernando Marianno; Hendrik F. Hamann; Vanessa López; Marco Leona. 2017. "Wireless Sensor Platform for Cultural Heritage Monitoring and Modeling System." Sensors 17, no. 9: 1998.
O Allegretti; P Dionisi-Vici; J Bontadi; F Raffaelli; Peter Vandenabeele; Danilo Bersani; António Candeias. The case study of The daughters of the Emperor Ferdinand I by Jakob Seisenegger, in Trento (Italy): analytical hygro-mechanical results as a support in risk assessment for technical interventions. inArt 2016 2017, 381 -390.
AMA StyleO Allegretti, P Dionisi-Vici, J Bontadi, F Raffaelli, Peter Vandenabeele, Danilo Bersani, António Candeias. The case study of The daughters of the Emperor Ferdinand I by Jakob Seisenegger, in Trento (Italy): analytical hygro-mechanical results as a support in risk assessment for technical interventions. inArt 2016. 2017; ():381-390.
Chicago/Turabian StyleO Allegretti; P Dionisi-Vici; J Bontadi; F Raffaelli; Peter Vandenabeele; Danilo Bersani; António Candeias. 2017. "The case study of The daughters of the Emperor Ferdinand I by Jakob Seisenegger, in Trento (Italy): analytical hygro-mechanical results as a support in risk assessment for technical interventions." inArt 2016 , no. : 381-390.
Displacement transducers, put in different positions, relevant from the structural point of view; microclimatic monitoring (temperature and relative humidity); mass variation monitoring, using an innovative differential scale able to measure the response of the panel to the fluctuations with an otherwise impossible resolution.
O Allegretti; P Dionisi-Vici; J Bontadi; F Raffaelli. The case study of The daughters of the Emperor Ferdinand I by Jakob Seisenegger, in Trento (Italy): analytical hygro-mechanical results as a support in risk assessment for technical interventions. Applied Physics A 2016, 123, 38 .
AMA StyleO Allegretti, P Dionisi-Vici, J Bontadi, F Raffaelli. The case study of The daughters of the Emperor Ferdinand I by Jakob Seisenegger, in Trento (Italy): analytical hygro-mechanical results as a support in risk assessment for technical interventions. Applied Physics A. 2016; 123 (1):38.
Chicago/Turabian StyleO Allegretti; P Dionisi-Vici; J Bontadi; F Raffaelli. 2016. "The case study of The daughters of the Emperor Ferdinand I by Jakob Seisenegger, in Trento (Italy): analytical hygro-mechanical results as a support in risk assessment for technical interventions." Applied Physics A 123, no. 1: 38.
Giacomo Goli; Paolo Dionisi-Vici; Luca Uzielli. Locating contact areas and estimating contact forces between the “Mona Lisa” wooden panel and its frame. Journal of Cultural Heritage 2014, 15, 391 -402.
AMA StyleGiacomo Goli, Paolo Dionisi-Vici, Luca Uzielli. Locating contact areas and estimating contact forces between the “Mona Lisa” wooden panel and its frame. Journal of Cultural Heritage. 2014; 15 (4):391-402.
Chicago/Turabian StyleGiacomo Goli; Paolo Dionisi-Vici; Luca Uzielli. 2014. "Locating contact areas and estimating contact forces between the “Mona Lisa” wooden panel and its frame." Journal of Cultural Heritage 15, no. 4: 391-402.
Ottaviano Allegretti; Marco Fioravanti; Paolo Dionisi-Vici; Luca Uzielli. The influence of dovetailed cross beams on the dimensional stability of a panel painting from the Middle Ages. Studies in Conservation 2014, 59, 233 -240.
AMA StyleOttaviano Allegretti, Marco Fioravanti, Paolo Dionisi-Vici, Luca Uzielli. The influence of dovetailed cross beams on the dimensional stability of a panel painting from the Middle Ages. Studies in Conservation. 2014; 59 (4):233-240.
Chicago/Turabian StyleOttaviano Allegretti; Marco Fioravanti; Paolo Dionisi-Vici; Luca Uzielli. 2014. "The influence of dovetailed cross beams on the dimensional stability of a panel painting from the Middle Ages." Studies in Conservation 59, no. 4: 233-240.
The paper describes an analytical approach that allows to forecast the end time of the oxygen dilution process during the preparation phase of anoxic treatments for the eradication of biological attacks to objects of art. The described methodology allows also to verify during the process if the dilution procedure is progressing correctly.
Paolo Dionisi-Vici; Masahiko Tsukada. Real-time evaluation of the efficacy of anoxic treatment for Cultural Heritage objects. Scientia International Review 2014, 126, 1 .
AMA StylePaolo Dionisi-Vici, Masahiko Tsukada. Real-time evaluation of the efficacy of anoxic treatment for Cultural Heritage objects. Scientia International Review. 2014; 126 (126):1.
Chicago/Turabian StylePaolo Dionisi-Vici; Masahiko Tsukada. 2014. "Real-time evaluation of the efficacy of anoxic treatment for Cultural Heritage objects." Scientia International Review 126, no. 126: 1.
Ottaviano Allegretti; Matteo DE Vincenzi; Luca Uzielli; Paolo Dionisi-Vici. Long-term hygromechanical monitoring of Wooden Objects of Art (WOA): A tool for preventive conservation. Journal of Cultural Heritage 2013, 14, e161 -e164.
AMA StyleOttaviano Allegretti, Matteo DE Vincenzi, Luca Uzielli, Paolo Dionisi-Vici. Long-term hygromechanical monitoring of Wooden Objects of Art (WOA): A tool for preventive conservation. Journal of Cultural Heritage. 2013; 14 (3):e161-e164.
Chicago/Turabian StyleOttaviano Allegretti; Matteo DE Vincenzi; Luca Uzielli; Paolo Dionisi-Vici. 2013. "Long-term hygromechanical monitoring of Wooden Objects of Art (WOA): A tool for preventive conservation." Journal of Cultural Heritage 14, no. 3: e161-e164.
International audienceThis paper describes the "Deformometric Kit" (DK), which is both a methodological approach and an equipment conceived, designed and made at DEISTAF (University of Florence). The DK's main purpose is to carry out measurements and monitoring of the deformation dynamics of wooden objects. The monitoring can take place in virtually any environment, for any desired duration (minutes, hours, weeks, years, and so on). The measurement can be carried out mainly, but not exclusively, in connection with fluctuations of ambient temperature and relative humidity. The DK provides a reliable and accurate record (a first step towards understanding) of the behaviour of original panel paintings placed in their usual exhibition location, enabling curatorial staff and researchers to (a) obtain information about the behaviour of individual supports, in order to evaluate the impact of climate on their conservation state, help to make decisions for future restoration interventions; and (b) provide reference data for calibrating and validating numeric models. It can also provide data on the deformation of a panel while it is handled and transported, enabling an evaluation of stresses to which it is subjected during this operation. The device consists of two displacement transducers, which are fixed (in a low-impact, reversible way) to the back face of the panel, perpendicular to the grain, at different distances from the panel's surface. The two transducers not only measure the in-plane shrinkage/swelling of the panel, but since they are located at different distances, their measurements can also be combined with simple geometrical calculations to indicate the amount of distortion (cupping) which the panel undergoes. This paper explains the geometrical principles on which the DK is based, as well as its construction. Some examples of the data which have been obtained during actual monitoring by the DK are also included
Luca Uzielli; Linda Cocchi; Paola Mazzanti; Marco Togni; Delphine Jullien; Paolo Dionisi-Vici. The Deformometric Kit: A method and an apparatus for monitoring the deformation of wooden panels. Journal of Cultural Heritage 2012, 13, S94 -S101.
AMA StyleLuca Uzielli, Linda Cocchi, Paola Mazzanti, Marco Togni, Delphine Jullien, Paolo Dionisi-Vici. The Deformometric Kit: A method and an apparatus for monitoring the deformation of wooden panels. Journal of Cultural Heritage. 2012; 13 (3):S94-S101.
Chicago/Turabian StyleLuca Uzielli; Linda Cocchi; Paola Mazzanti; Marco Togni; Delphine Jullien; Paolo Dionisi-Vici. 2012. "The Deformometric Kit: A method and an apparatus for monitoring the deformation of wooden panels." Journal of Cultural Heritage 13, no. 3: S94-S101.
Paolo Dionisi-Vici; Matteo De Vincenzi; Luca Uzielli. An Analytical Method for the Determination of the Climatic Distance between Different Microclimates for the Conservation of Wooden Cultural Heritage Objects. Studies in Conservation 2011, 56, 41 -57.
AMA StylePaolo Dionisi-Vici, Matteo De Vincenzi, Luca Uzielli. An Analytical Method for the Determination of the Climatic Distance between Different Microclimates for the Conservation of Wooden Cultural Heritage Objects. Studies in Conservation. 2011; 56 (1):41-57.
Chicago/Turabian StylePaolo Dionisi-Vici; Matteo De Vincenzi; Luca Uzielli. 2011. "An Analytical Method for the Determination of the Climatic Distance between Different Microclimates for the Conservation of Wooden Cultural Heritage Objects." Studies in Conservation 56, no. 1: 41-57.
Paolo Dionisi-Vici; P. Mazzanti; Luca Uzielli. Mechanical response of wooden boards subjected to humidity step variations: climatic chamber measurements and fitted mathematical models. Journal of Cultural Heritage 2006, 7, 37 -48.
AMA StylePaolo Dionisi-Vici, P. Mazzanti, Luca Uzielli. Mechanical response of wooden boards subjected to humidity step variations: climatic chamber measurements and fitted mathematical models. Journal of Cultural Heritage. 2006; 7 (1):37-48.
Chicago/Turabian StylePaolo Dionisi-Vici; P. Mazzanti; Luca Uzielli. 2006. "Mechanical response of wooden boards subjected to humidity step variations: climatic chamber measurements and fitted mathematical models." Journal of Cultural Heritage 7, no. 1: 37-48.