Search results for "INTU"

Deep-Learning-Enabled Fast Optical Identification and Characterization of 2D Materials.

2020

© 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Advanced microscopy and/or spectroscopy tools play indispensable roles in nanoscience and nanotechnology research, as they provide rich information about material processes and properties. However, the interpretation of imaging data heavily relies on the “intuition” of experienced researchers. As a result, many of the deep graphical features obtained through these tools are often unused because of difficulties in processing the data and finding the correlations. Such challenges can be well addressed by deep learning. In this work, the optical characterization of 2D materials is used as a case study, and a neural-network-based algorithm is de…

"One-touch" voltammetry of microparticles for the identification of corrosion products in archaeological lead

2011

Voltammetry of microparticles is applied to the identification of lead corrosion products by means of an essentially non-invasive 'one-touch' technique based on the use of graphite pencil. This methodology permits the mechanical attachment of few nanograms of sample from the surface of lead archaeological artefacts to a paraffin-impregnated graphite electrode, which, upon immersion in aqueous electrolytes, provides distinctive voltammetric responses for litharge and cotunnite- anglesite-, cerusite-based corrosion products. The reported method is applied to the identification of corrosion products in archaeological lead pieces from different Iberian sites in Valencia (Spain). © 2011 WILEY-VC…

Du souvenir de la Commune de Paris à l'expérience de la Grande Guerre : Luce et la peinture, d'histoire.

2010

Tanssi sinisen pellon kaduilla : kokemuksia ja kohtaamisia Bluefieldsin kaupungissa Nicaraguassa

2000

Characterization of Maya Blue Pigment in Pre-Classic and Classic Monumental Architecture of the Ancient Pre-Culombian City of Calakmul (Campeche, Mex…

2011

This paper presents the first evidence of the use of Maya Blue pigment in late pre-classic (c.300BC-300AD) architecture in the Maya Lowlands. This was detected combining an innovative technique, the voltammetry of microparticles (VMP), with atomic force microscopy (AFM), transmission electron microscopy (TEM), scanning electron microscopy/energy dispersive X-ray microanalysis (SEM/EDX), visible spectrophotometry and Fourier transform infrared spectroscopy (FTIR). The pigment was found on the polychrome facade of substructure IIC of pre-Columbian city of Calakmul (Campeche, Mexico). The identification of Maya Blue in this building may prove to be the earliest known use of this colour on the …

‘Maya chemistry’ of organic–inorganic hybrid materials: isomerization, cyclicization and redox tuning of organic dyes attached to porous silicates

2013

[EN] Association of indigo and lapachol dyes to aluminosilicate clays yields polyfunctional organic – inorganic hybrid materials forming Maya Blue-like systems. Upon partial removing of clay's zeolitic water by moderate thermal treatment, abundant isomerization, cyclicization and oxidation reactions occur defining a‘ Maya chemistry whose complexity could explain the versatile use of such materials in the pre-Columbian cultures and permits the preparation of polyfunctional materials potentially usable for therapeutic and catalytic purposes.

Polysaccharide remains in Maya mural paintings: is it an evidence of the use of plant gums as binding medium of pigments and additive in the mortar?

2020

A number of monosaccharides characteristic of plant gums were found in paint layers and preparation layers of samples of Maya mural paintings of 10 archaeological sites located in Campeche and Yucatan regions. This finding opens the question about the deliberate use of these organic polymers as additives for improving workability and mechanical properties in the preparation layer mortar and conferring cohesion to the pigments in the paint layer. The study performed by GC-MS has confirmed the presence, in significant amounts, of a series of monosaccharides, being glucose and mannose between the most abundantly found. Nevertheless, the low amount present in most of the samples hindered the qu…

Quantum Mechanics as a Semantic Problem

2018

Physics, like all science, is grown out of a desire to understand the world. However, modern physics with its mathematical form has become increasingly removed from the world of everyday experience and visual imagination. In quantum mechanics it is impossible to visualize the reality represented by the theory. All we have is a consistent mathematical structure. Although the theory works perfectly well instrumentally, the question remains, how can the mathematics of the theory impart understanding? If we look at mathematics as a language, we are faced with the semantic problem: how does the language of mathematics acquire meaning? In an attempt to answer this question, I study Derrida’s earl…

Cambio y fundamentos literarios en el arte ruso fin-de-siècle

2011

Los orígenes del arte nuevo pueden estar relacionados con las aspiraciones de los Peredvizhniki durante la década de 1870, que había sido la creación de un arte verdaderamente nacional; por esa razón habían despreciado demasiado el tener estrechas asociaciones con los movimientos artísticos de más auge en el extranjero; sin embargo su trabajo se acercaba más a las técnicas de esos mismos grupos y a los temas de género y de pintura histórica europeos contemporáneos que a cualquier tradición artística específicamente rusa. Pero mientras que los Peredvizhniki intentaban, al igual que Tolstoi y Dostoievski, encontrar el alma de Rusia en las condiciones de la vida contemporánea, se alzó simultán…

Indication and Timing

2016

Tracheostomy is performed in patients requiring prolonged mechanical ventilation aiming at avoiding the potential detrimental effect of a sustained translaryngeal intubation (e.g. laryngeal oedema, mucosal ulcerations). Potential benefits of tracheostomy in critically ill patients are improved comfort and reduced need for sedation, easier clearance of secretions and oral hygiene, and a possible faster weaning from mechanical ventilation. Controversy exists over optimal timing (early, tracheostomy placement compared with later time points) in patients with respiratory failure. Among the published randomised controlled trials, two large studies did not report a significant advantage of an ear…