Search results for "RESTOR"
showing 10 items of 670 documents
Regularization Method in Infrared Image Processing
2003
Abstract Infrared images often present distortions induced by the measurement system. Thus, image processing is a vital part of infrared measurements. A distortion model based on a convolution product is presented. Image restoration is an ill-posed problem and its solution can be obtained using regularization methods. In this paper, image restoration is performed using a variation of Tikhonov regularization that makes use of the particular form of the convolution kernel matrix, which is built as a block-circulant matrix that admits a diagonal form in the two-dimensional Fourier space. The restoration procedure is used to restore a knife-edge infrared source image.
Influence of organic amendments on diuron leaching through an acidic and a calcareous vineyard soil using undisturbed lysimeters.
2008
9 pages; International audience; The influence of different organic amendments on diuron leaching was studied through undisturbed vineyard soil columns. Two composts (A and D), the second at two stages of maturity, and two soils (VR and Bj) were sampled. After 1 year, the amount of residues (diuron þ metabolites) in the leachates of the VR soil (0.19e0.71%) was lower than in the Bj soil (4.27e8.23%), which could be explained by stronger diuron adsorption on VR. An increase in the amount of diuron leached through the amended soil columns, compared to the blank, was observed for the Bj soil only. This result may be explained by the formation of mobile complexes between diuron and water-extrac…
Green Oxidation of Alcohols to Carbonyl Compounds by Heterogeneous Photocatalysis
2010
Titania Photocatalysts for Selective Oxidations in Water
2011
Heterogeneous photocatalysis by polycrystalline semiconductor oxides is an unconventional technology that has been mainly applied for the degradation of organic and inorganic pollutants in both the vapor and liquid phase. The application of photocatalysis in synthetic routes has also been researched in recent years, demonstrating its viability as an alternative route in organic chemistry. This work illustrates the main findings in the application of heterogeneous photocatalysis to the oxidation of organic compounds dissolved in water, free of any organic co-solvent. Two main aspects of the oxidative process have been studied: the first one is the partial oxidation of various mono-substitute…
Effect of addition of Nano hydroxyapatite particles on wear of resin modified glass ionomer by tooth brushing simulation
2016
Background Recently, incorporation of nanohydroxyapatite (NHA) has been suggested to improve the mechanical properties of glass ionomers (GIs). This study aimed to assess the effect of addition of NHA on wear of resin modified glass ionomer (RMGI) by tooth brushing simulation. Material and Methods In this in vitro, experimental study, NHA in 1, 2, 5, 7 and 10wt% concentrations was added to Fuji II LC RMGI powder, and 48 samples (5×5mm) in five experimental and one control group (n=8) were fabricated. After polishing, cleaning and incubation at 37°C for three weeks, the samples were weighed and subjected to tooth brushing simulation in a toothpaste slurry according to ISO14569-1. Then, they …
Città, intonaci, colore. Problematiche inerenti al restauro degli intonaci storici
2012
Con il trascorrere del tempo ogni luogo rende concreta la propria identità visiva e lo spazio percepito come luogo partecipa alla determinazione di relazioni affettive con la gente. Ma cosa accade se le caratteristiche volumetriche e materiche che definiscono il carattere dei luoghi sono all’improvviso alterate? Quali conseguenze si avvertono se il processo di globalizzazione in atto comporta la diffusione in ogni luogo degli stessi materiali per l’architettura? E quali effetti si determinano se tale processo investe i centri storici? Il volume vuole ripercorrere le dinamiche del recupero dei centri storici in Italia negli ultimi quarant’anni, che stanno completamente alterando la scena urb…
Evaluation of the indoor comfort of the Arabic-Norman architecture for its valorization
2018
Nel 2015 il percorso arabo normanno di Palermo, Cefalù e Monreale è stato riconosciuto patrimonio dell’Umanità. Tra i monumenti del percorso la Zisa costituisce un esempio straordinario di tipologia edilizia con caratteristiche tecnologiche ed ambientali uniche perché, originariamente, era caratterizzato dall'integrazione di alcuni sistemi passivi per il miglioramento del comfort ambientale interno. Fu costruito nel 1160 da artigiani arabi. Era caratterizzato dalla presenza di un sistema di raffreddamento evaporativo e ventilazione naturale che garantiva livelli di comfort che potevano essere soddisfacenti anche ai giorni nostri. La ricerca propone i risultati ottenuti attraverso l’applicaz…
Perfil biográfico del restaurador Luis Roig d'Alós (Valencia, 1904-1968)
2013
[ES] El presente artículo pretende dejar constancia de la importancia que supuso, durante los años centrales del siglo XX, la figura del catedrático de restauración Luis Roig d Alós, en el panorama de la restauración en Valencia. No solo por la gran cantidad de obras de arte que intervino sino también por tratarse de un pionero en la introducción de la disciplina de restauración en la entonces Escuela de Bellas Artes de San Carlos de donde fue Catedrático, así como su labor al frente de la Colección Municipal como restaurador del Ayuntamiento de Valencia. A lo largo de su dilatada trayectoria, Roig d Alós se dedicó plenamente a la creación artística, a la investigación, la conservación y re…
Estudios previos y propuesta de intervención en las pinturas murales, esculturas y ornamentos de la Real Parroquia de los Santos Juanes de Valencia
2020
Throughout this article, the most representative aspects of the previous studies and the intervention proposal, carried out for the restoration of the paintings, sculptures and ornaments of the Royal Parish of the Santos Juanes in Valencia, are exposed. A project of this magnitude involves the effort and dedication of a great team, resulting in one-year work with exhaustive and constant research with the purpose of safeguarding the heritage assets of the church. With this article we want to make known the importance that these previous studies acquire. Been essential since they are the starting point and the basis for the execution of the restoration works that will be carried out during fo…
RIGENERAZIONE DI CITTADINE RURALI MEDIANTE IL TURISMO SOSTENIBILE: UN MODELLO DI VALUTAZIONE
2017
Rehabilitation of ancient towns poses special questions because of the existing complex physical and social ties that can be properly integrated in decisions on sustainable urban planning by multi-criteria evaluations. This work proposes a description model aiding actions and decisions for the rehabilitation of historic centres through tourism development in Sicilian hinterland areas. The decision problem concerns the town of Cianciana, which in recent years has been appreciated by strangers who stay on this town to live with the local inhabitants. Despite this international attention, at present, the town is undergoing local’s depopulation, gentrification and economic crisis. The proposed …