1,721,131 research outputs found
Assessment of portable and miniaturized sensors for the monitoring of human exposure to air pollutants
Full text linkIn the last years, several in-field campaigns have been conducted using portable and miniaturized monitors to evaluate the personal exposure to different pollutants. In general, this kind of monitors are characterized by worse metrological performance if compared to the traditional standard methods. Despite this disadvantage, portable and miniaturized monitors could be easily used across different applications, because their advantageous features, such as the capability to provide real-time measurement, the high spatial and temporal resolution of acquired data, the ability to adapt to different experimental designs and, especially, the ability to follow the subject in any activity. Finally, portable and miniaturized instruments can provide data acquired in the respiratory zone of the subject, following therefore the practices for a correct exposure assessment. Obviously, the best compromise between the analytical gold standard (in terms of precision, accuracy and instrumental sensitivity) and the gold standard in regard to the exposure assessment should be chosen.
Therefore, in brief, principal aims of this thesis are (i) to evaluate the on-field performances of portable and miniaturized monitors for gaseous pollutants and airborne PM and (ii) to use these monitors in exposure assessment studies and (iii) to understand if data acquired via portable and miniaturized monitors could be useful in other fields of application, such as epidemiological studies or toxicological studies, in which the evaluation of the inhaled dose of pollutants could play a key role
Editorial: Biologically inspired Artificial Intelligent systems: state and perspectives
Full text linkMass concentration and size-distribution of atmospheric fine, ultrafine and nanoparticles in the urban area of Como, Northern Italy
No full textInfluence of the nanostructure on the electric transport properties of resistive switching cluster-assembled gold films
Full text linkThe use of Au clusters produced in the gas phase and deposited at low kinetic energy on a substrate allows the bottom-up fabrication of nanostructured metallic thin films with an extremely large number of interfaces, grain boundary junctions and crystal lattice defects. Cluster-assembled gold films exhibit non-ohmic electrical transport properties with a complex resistive switching behavior, exploring discrete resistance states which depend on their structural features (average thickness, resistance value reached on the percolation curve). Their electric conduction properties can be modelled in terms of complex networks of nanojunctions and used to perform binary classification of Boolean functions. The fabrication of devices based on cluster-assembled Au films and exploiting emergent complexity and collective phenomena requires a deep understanding of the influence of the nanoscale structure on the fundamental mechanisms of electrical conduction. Here we present a detailed study of the correlation between the nanostructure and the electrical properties of cluster-assembled gold films by a systematic characterization of the film growth from sub-monolayer to continuous layer beyond the electrical percolation threshold. The influence of different cluster size distributions on the onset of the electrical conduction and the role of defects is investigated by combining in situ and ex situ electrical and structural characterizations
Dati non convenzionali per la stima dell’inquinamento atmosferico in aree agricole: modellazione e valutazione del rischio in Regione Lombardia, Italia.
No full textMass concentration and size-distribution of atmospheric fine, ultrafine and nanoparticles in the urban area of Como, Northern Italy
No full textEffetti del cambiamento climatico sulla popolazione generale e sulla popolazione occupazionalmente esposta
No full textRespirable particles from cutting and grinding ceramic tiles: evaluation of occupational exposure and scanning electron microscopy investigation
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