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No full textIl contributo di S.M. alla pubblicazione riguarda il testo introduttivo "L'Europa e l'IUAV"( p 1) la presentazione del progetto redatto dal gruppo di studenti (M. Bandiera, A. Beraldo, M. Bornar, K. Kucola, M, Dus, L. Mattana, A. Tessari) guidato da S. Maffioletti per il concorso "Premio Schindler 2004. Access for all" per la rivitalizzazione di un'area del centro di Bruxelles: il progetto è stato riconosciuto con un premio. La pubblicazione, curata da M. Montuori, vede la presenza altresì dei contributi del gruppo diretto da A. Cornoldi e quello da M. Montuori
An ABORT-like detector with improved mismatched signals rejection capabilities
No full textIn this paper, we present a GLRT-based adaptive detection algorithm for extended targets with improved rejection capabilities of mismatched signals. We assume that a set of secondary data is available and that noise returns in primary and secondary data share the same statistical characterization. To increase the selectivity of the detector, similarly to the ABORT formulation, we modify the hypothesis testing problem at hand introducing fictitious signals under the null hypothesis. Such unwanted signals are supposed to be orthogonal to the nominal steering vector in the whitened observation space. The performance assessment, carried out by Monte Carlo simulation, shows that the proposed dectector ensures better rejection capabilities of mismatched signals than existing ones, at the price of a certain loss in terms of detection of matched signals
In situ phytoremediation of arsenic- and metal-polluted pyrite waste with field crops: Effects of soil management
No full textSunflower, alfalfa, fodder radish and Italian ryegrass were cultivated in severely As–Cd–Co–Cu–Pb–Zn-contaminated pyrite waste discharged in the past and capped with 0.15 m of unpolluted soil at Torviscosa (Italy). Plant growth and trace element uptake were compared under ploughing and subsoiling tillages (0.3 m depth), the former yielding higher contamination (∼30%) in top soil. Tillage choice was not critical for phytoextraction, but subsoiling enhanced above-ground productivity, whereas ploughing increased trace element concentrations in plants. Fodder radish and sunflower had the greatest aerial biomass, and fodder radish the best trace element uptake, perhaps due to its lower root sensitivity to pollution. Above-ground removals were generally poor (maximum of 33 mg m−2 of various trace elements), with Zn (62%) and Cu (18%) as main harvested contaminants. The most significant finding was of fine roots proliferation in shallow layers that represented a huge sink for trace element phytostabilisation. It is concluded that phytoextraction is generally far from being an efficient management option in pyrite waste. Sustainable remediation requires significant improvements of the vegetation cover to stabilise the site mechanically and chemically, and provide precise quantification of root turnover
Una indagine sui Corsi di Perfezionamento rivolti agli insegnanti (a.a. 1993/'94 e 1994/'95)
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