1,721,705 research outputs found
SLC: problematiche relative alla determinazione del contenuto in campioni massivi
No full textIL capitolo confronta dati sperimentali e di letteratura sulla problematica della determinazione della quantità di SLC in campioni reali provenienti da compartivi lavorativ
ASO Author Reflections: Robotic Perihilar Cholangiocarcinoma Beyond Technical Feasibility
No full textCan Arsenic be trapped by calcite? An X-Ray absorption spectroscopy study
No full textIn this study, three different and complementary approaches are undertaken, with the aim of ascertaining the effectiveness of the carbonate arsenite substitution process under natural conditions, by studying travertines coming from a geogenic As anomaly in Southern Tuscany (middle Pecora River Valley)
Minero-chemical and spectroscopic investigations of natural and synthetic sphalerite
No full textHighlights of the study for the PhD thesis carried out by the autho
A real-time automatic pavement crack and pothole recognition system for mobile Android-based devices
No full textDue to the rapid growth of vehicles and traffic accidents caused by road pavement defects, road safety has become a pressing concern worldwide. For this reason, Countries and Federal States have started focusing their resources on the analysis of civil infrastructures to assess their safety and serviceability. The analyses are performed by specialized teams of inspectors and structural engineers who manually inspect road infrastructures and provide detailed reports about the detected pavement distresses and their magnitudes. This work aims at providing a new system able to detect the framed distress using solely the computational resources provided by a mobile device To reach this goal, an automatic pavement distress recognition system based on the OpenCV library is developed and embedded in a mobile application, enabling the recognition of three common pavement distresses: Pothole, Longitudinal-Transversal Cracks, and Fatigue Cracks. Our method, tested on several Android mobile platforms, is able recognize the pavement distresses of interest reaching more than 0.7 of Precision, Recall, Accuracy, and F-Measure. This application promises to improve the on-site work of inspectors by decreasing the time required to perform inspections while ensuring, at the same time, a higher level of accuracy
Rolling particle lithography by soft polymer microparticles
No full textElastomeric polymeric microspheres are employed as a direct-writing tool for the continuous delivery of molecular materials. The mechanical properties enabling patterning are investigated and modelled. The proposed approach provides a low cost and versatile lithographic method for transferring features with real-time dynamic control. This journal is © 2013 The Royal Society of Chemistry
A methodology to orient carbon nanotubes in a thermosetting matrix
No full textA new procedure for the alignment of carbon nanotubes in a thermosetting matrix is proposed in this study. The two-step approach is based on (i) the alignment of carbon nanotubes (CNTs) in thermoplastic fibres by electrospinning and (ii) the transfer of these nanocompositefibres into a reactive thermosetting resin, in which they are easily soluble. After fibre dissolution, the CNTs remain aligned in the cured thermosetting matrix.The proof of concept is demonstrated by producing electrospunpolymethyl methacrylate (PMMA) fibres filled with single wall carbon nanotubes (SWCNTs) in the form of unidirectional tape, which are then solubilised into a vinylester (VE) matrix. The PMMA is easily dissolved by the styrene present in the VE resin, leaving SWCNTs aligned in the cured VE network, as confirmed by Raman spectroscopy studies. A 50% increase in elastic modulus (SWCNT 1.3. wt.%) has been obtained by dynamic mechanical analysis carried out in tensile mode at 1. Hz. Thanks to its ability to orient carbon nanotubes in a thermosetting matrix, the proposed method can be exploited also to transfer oriented nanofillers into continuous fibre composites, thus obtaining multiscale or hierarchical composites. © 2014 Elsevier Ltd
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