1,216 research outputs found
Feature reduction of hyperspectral data using autoassociative neural networks algorithms
No full textIn this paper Autoassociative Neural Networks (AANN) are used to implement Nonlinear Principal Component Analysis (NLPCA) for dimension reduction of hyperspectral data. The nonlinear components are then considered as inputs for a Multi-Layer Perceptron (MLP) network to perform pixel-based classification. The methodology has been applied considering the test area of Tor Vergata - Frascati, Italy, and the hyperspectral data provided by the CHRIS-PROBA mission. Comparative analysis with a similar procedure considering a more standard dimensionality reduction technique such as Principal Component Analysis (PCA) has been carried ou
Autoassociative neural networks for features reduction of hyperspectral data
No full textn this paper the potential of neural networks has been applied to hyperspectral data and exploited either for classification purposes or for data feature extraction and dimensionality reduction. For this latter task, a topology named autoassociative neural network has been used. In its complete form, the processing scheme uses a neural network architecture consisting of two stages: the first stage reduces the dimension of the input vector while the second stage performs the mapping from the reduced input vector into the land cover classification. The effectiveness of the feature extraction algorithm has been evaluated for a set of experimental data provided by the AHS radiometer comparing its performance to that obtainable with more traditional linear techniques such as PCA, while the accuracy of the final classification map has been computed on the base of the available ground-trut
Hyperspectral and multi-angle CHRIS proba images for the generation of land cover maps
No full textAbstract—The small hyperspectral imager Compact High-Resolution Imaging Spectrometer (CHRIS) is the most important instrument for Earth observation included in the payload
of the European Space Agency Third-Part Mission Project for On-Board Autonomy (PROBA)-1 satellite. This instrument has
provided dozens of images in several target areas in the world, and a good number of acquisitions are available for the test site
of Frascati and Tor Vergata, Italy. This paper reports several results concerning the generation of thematic maps obtained from
CHRIS mode-3 imagery. The potential of the use of different configurations for the input vector exploiting multispectral, multiangular, and multitemporal measurements has been investigated, and the results have been evaluated and compared in terms of
accuracy in the classification. The core of the decision task has been developed using the neural network methodology. Indeed,
this approach is characterized by a particular ease in performing nonlinear mapping of a multidimensional set of inputs into the output one
Interpreting the mechanism of action of polyamines: twenty years of plant transglutaminases
No full textThe post-translational modification of proteins by polyamines forming inter- or intra-molecular cross-links has been the main transglutaminase (TGase) reaction studied in plants. Plant transglutaminases have been studied in our laboratory since 1987 in investigations aimed at interpreting some of the molecular mechanisms by which polyamines affect plant growth, differentiation, reaction to stresses, PCD. Transglutaminase activity is ubiquitous: it has been detected in algae and in angiosperms in different organs and sub-cellular compartments: chloroplasts, cytosol, microsomal fraction, cell walls (1).
Possible roles concern the structural modification of specific proteins. In the cytosol, they modify actin and tubulin, also influencing motor proteins, thus exerting a role on cell growth and cell structure (2). In chloroplasts, transglutaminases appear to stabilise the photosynthetic complexes and Rubisco, being regulated by light and other factors, and possibly exerting a positive effect on photosynthesis and photoprotection (1). Recent reports suggest an involvement in construction/organisation of the cell wall and extracellular matrix in relationship with fertilisation and a possible role of pollen extracellular TGase in cross-allergenicity. Other roles appear to be related to stresses, senescence and programmed cell death, including the hypersensitive reaction caused by TMV virus. The cross recognition of substrates between plant and animal enzymes suggest both similarities and differences. Proofs of their catalytic activity are: 1. their ability to produce glutamyl-polyamine derivatives, 2. their recognition by animal transglutaminase antibodies, 3. biochemical features such as calcium- and GTP-dependency, etc. 4. Inhibition by specific inhibitors of animal transglutaminases. However, many of their fundamental physiological properties still remain elusive. The few plant transglutaminases sequenced so far have little sequence homology with the best-known animal enzymes, except for the catalytic triad; however, they share a possible structural homology (3). Specificity and similarity with animal transglutaminases are discussed in the light of their biochemical characteristics and functional roles.
1. Serafini-Fracassini D and Del Duca S (2008) Tranglutaminases: widespread cross-linking enzymes in plants. Ann. Bot. 102, 145-152. DOI 10.1093/aob/mcn075. 2. Del Duca S. et al. (2008) Effects of post-translational modifications catalyzed by pollen transglutaminase on the functional properties of microtubules and actin filaments. Biochem. J., 418 3,651-664. 3. Serafini-Fracassini D, et al. (2008) Plant and animal transglutaminases: do similar functions imply similar structures? Amino Acids 36 (4) 643-657, DOI: 10.1007/s00726-008-0131-9
FUNDING: MUR-PRIN, Interaction mechanisms for protein mediators of flower incompatibility in fertilisation of fruit trees,to D.S-F;“Crossallergenicity”, Progetto Strategico d’Ateneo 2006 to D.S-F
Per una ricostruzione dell’Apostolado del Duca d’Alcalá
No full textL'articolo ricostruisce per la prima volta la celebre serie dell'Apostolato che il Duca d'Alcalà commissionò ai tredici pittori "più insigni" che si trovavano in Italia nel 1625. La ricerca ha permesso di collegare alla serie, per la prima volta, tele di Artemisia Gentileschi, Guido Reni, Giovanni Baglione, Battistello Caracciolo e Jusepe de Ribera
Nuovo Hotel in Piazza Duca d'Aosta, Milano-Onsitestudio
No full text• Albergo in Piazza Duca D’Aosta, Milano. Onsitestudio (Lunati A., Floridi G.). Progettazione per la sostituzione dell’edificio sito tra Piazza Duca D’Aosta, Via Vitruvio e Via Napo Torriani (per Reale Immobili spa.). Concorso di progettazione ad inviti: 2013. Costruzione: 2014-2015.
Pubblicazioni principali:
• Floridi G., Lunati A. (2017). Nuovo Hotel in Piazza Duca d'Aosta, Milano in Biraghi M., Lo Ricco G., Micheli, S., Guida all'Architettura di Milano 1954-2015, Hoepli, Milano, p. 278, ISBN: 9788820364700.
• Floridi G., Lunati A. (2020). "Onsitestudio. 50 Best Architecture Firms 2020" in Domus, vol. 1044, pp. 82-83, ISSN: 0012-5377.
• Floridi G., Lunati A. (2020). Onsitestudio - Mailand, Milan, Quart Verlag Gmbh, Luzern, pp. 1-80, ISBN: 9783037612156.
• Floridi G., Lunati A. (2016). "Onsitestudio. Albergo in Piazza Duca D'Aosta", Tranfa, F., Casabella, vol. 867, pp. 26-32, ISSN: 0008-7181.
• Floridi G., Lunati A. (2015). Nuovo Hotel in Piazza Duca d'Aosta, Milano in M. V. Capitanucci, M. V. (a cura di), Milano Architettura. La città e l'Expo, Skira, Milano, pp. 52-53, ISBN: 8857228533.
• Floridi G., Lunati A. (2015). "Onsitestudio. Piazza Duca D'Aosta Hotel, Milan" in Arketipo, vol. 92, ISSN: 1828-4450.
• Floridi G., Lunati A. (2016). Onsitestudio, Hotel in Piazza Duca D'Aosta in Consiglio Nazionale Architetti Paesaggisti Pianificatori, Yearbook - 1. Selezione di architetti italiani partecipanti all’edizione 2016 del Premio Architetto Italiano e Giovane Talento dell’Architettura, pp. 30-31, Letteraventidue, Siracusa, ISBN: 9788862422260.
• Floridi G., Lunati A. (2017). Nuovo Hotel in Piazza Duca d'Aosta, Milano in Degli Esposti, L. (a cura di), MCM Milano Capitale del Moderno, Actar, Barcellona, p. 554, ISBN: 9781945150715.
• Zucchi, C., Bassoli, N. (a cura di), "Innesti / Grafting - Italia, un paesaggio contemporaneo", Marsilio, XIV Mostra Internazionale di Architettura Biennale di Venezia, ISBN: 978-88-317-9971-1, pp. 79.
• Floridi G., Lunati A.(2020), Onsitestudio:Le ragioni di un'architettura di impianto, Mosco V. P. in "Viaggio in Italia: Architetture e città ", Maggioli Editore, 2021, ISBN: 8891633437
•
Premi:
• Premio Architetto Italiano 2016, promosso da Consiglio Nazionale Architetti Paesaggisti Pianificatori, Menzione Speciale.
• Premio Maestri Comacini 2019, sezione Nuove costruzioni, promosso dall’Ordine degli Architetti PPC di Como, Progetto segnalato.
Esposizioni:
• "Innesti / Grafting", XIV Mostra Internazionale di Architettura Biennale di Venezia (2014), Padiglione Italiano a cura di Cino Zucchi. Progetto selezionato per la mostra "Innesti / Grafting - Italia, un paesaggio Contemporaneo".
• "Two projects in Milan". Two projects of Onsitestudio with two photographs by Vincenzo Castella, "Two projects in Milan". Due progetti di Onsitestudio con due fotografie di Vincenzo Castella, via delle Orsole, Milano
Nicola Andria tra Scienza e Filosofia. Atti del I Convegno di Studi (Massafra, 28 ottobre 2011)
No full textL’eroe dell’Amba Alagi: storia e memoria del duca Amedeo di Savoia-Aosta
No full textIl dibattito pubblico sulla proposta di cambiare l’intitolazione del Liceo scientifico di Pistoia, dedicato al duca Amedeo di Savoia-Aosta, ha evidenziato il permanere di una narrazione apologetica del
principe sabaudo, coltivata da ambienti conservatori e connessa a una memoria nostalgica del passato coloniale italiano. Il contributo cerca di analizzare la figura del duca d’Aosta e la sua rappresentazione pubblica, concentrandosi sui passaggi più oscuri e controversi della sua vicenda, a partire dai
suoi legami con il regime fascista.The public debate on the proposal to change the title of the Liceo scientifico of Pistoia, dedicated to Duke Amedeo
of Savoy-Aosta, has highlighted the persistence of an apologetic representation of the Savoy prince, cultivated by
conservative circles and connected to a nostalgic memory of the Italian colonial past. The contribution aims to
analyse the figure of the Duke of Aosta and the public representation of him, focusing on the most unclear and
controversial passages of his story, starting from his ties with the fascist regime
Il partito dello stato. Crisi e ricostruzione del ducato visconteo nelle vicende di Milano e del suo contado (1402-1417)
No full textITALIANO: Il decennio successivo alla morte di Gian Galeazzo Visconti coincise in area lombarda con un momento di profonda incertezza circa il futuro assetto politico della regione, che per molti avrebbe dovuto allontanarsi dal modello costituito dallo stato regionale e centralista di Gian Galeazzo. La volontà di raccogliere, o rifiutare, l’eredità politica ed ideologica del primo duca di Milano fece da sfondo agli scontri che a partire dal 1402 si consumarono anche nella capitale e nelle sue campagne. Nel 1412 il recupero di Milano e del suo contado da parte di Filippo Maria, primo tassello della ricomposizione dello stato che sarebbe avvenuta negli anni seguenti, segnò
la vittoria di colui che incarnava, in termini non solo genealogici ma di prospettiva politica, la continuità con Gian Galeazzo. A sostenere Filippo nella capitale furono i membri di un composito “partito dello stato” (uno stato di matrice giangaleazziana), trasversale rispetto agli schieramenti guelfo e ghibellino. Il favore ad essi riservato dal nuovo duca – così come, all’opposto, la punizione inflitta agli oppositori – non mancò di trovare concreta traduzione anche nelle campagne più prossime alla capitale. / ENGLISH: The decade following the death of Gian Galeazzo Visconti was, in Lombardy and in the duchy, a
period of troubles and deep uncertainty. Many political actors started to reconsider the model of centralist regional state that Gian Galeazzo had imposed, as well as his political and ideological legacy. From 1402 onward, this dispute was the background of a harsh confrontation
which involved both Milan and the countryside. From 1412, Filippo Maria recovered Milan and its rural areas: in genealogical and political terms, he embodied the continuity with the politics of Gian Galeazzo. In Milan, the capital of the state, Filippo was supported by a composite “State party” that transcended Guelph and Ghibelline affiliations. The favour that the new duke
showed towards his supporters had concrete consequences not only in the city, but also in the surrounding territories
- …
