196,553 research outputs found
Taxonomic remarks on Dianthus sylvestris Wulfen group (Caryophyllaceae) in C-S Italian Peninsula, Sicily and Sardinia
No full textA taxonomic revision of the populations belonging to the Dianthus sylvestris Wulfen group (Caryophyllaceae) occurring
in central and southern Italy, Sardinia and Sicily has been made. This group is represented in the surveyed territories
by 17 morphologically and ecologically well differentiated species: Dianthus arrosti C. Presl, D. siculus C. Presl,
D. graminifolius C. Presl, D. cyathophorus Moris, D. gasparrinii Guss., D. longicaulis Ten., D. virgatus Pasquale, D. tarentinus
Lacaita, D. morisianus Vals., D. japygicus Bianco & Brullo, D. sardous Bacch., Brullo, Casti & Giusso, D. busambrae
Soldano & F. Conti, D. brachycalyx Huet sp. nov., D. oliastrae sp. nov., D. insularis sp. nov., D. genargenteus sp. nov. and
D. ichnusae sp. nov. Besides, two new subspecies are recognized within D. ichnusae (subsp. ichnusae and subsp. toddei).
This taxonomical treatment is supported by a multivariate analysis based on 25 morphological characters and
1 phenological character. Each of the taxa is described and illustrated. In addition, notes on nomenclature, ecology,
chorology, taxonomical relationships and conservation status are given. Lectotypes are designated for those taxa that are
based on material from the investigated territories
Le derive italiane del pensiero di Elisé Reclus: Arcangelo Ghisleri e il ruolo sociale della geografia
No full textIl teatro Donizetti. Metamorfosi della scena urbana a Bergamo
No full textIl volume raccoglie i risultati di una ricerca sulle relazioni tra la città di Bergamo e la sua più rilevante architettura teatrale, condotta dall'autore e da Emanuela Casti, che hanno coordinato due distinti gruppi di ricerca, costituiti presso il Dipartimento di Architettura e Studi Urbani del Politecnico di Milano e il Centro Studi Territorio dell’Università degli Studi di Bergamo.
La ricerca, finanziata dalla Fondazione Teatro Donizetti e da un cittadino bergamasco, è stata condotta mentre i lavori di
restauro e di recupero del Teatro Donizetti erano ancora in corso, con il preciso intento di testimoniare come la vicenda
di questo complesso architettonico, al contempo maestoso e fragile, si sia retta sulla presenza di un cantiere, per molti aspetti, "infinito". Il volume analizza le vicende che hanno accompagnato l’evoluzione della società e della cultura cittadine, documentando la continua sovrapposizione tra scena teatrale e scena urbana. Nell’orizzonte temporale degli ultimi due secoli, il transito del teatro (Riccardi, prima, Donizetti, poi) dentro momenti di crisi ricorrenti rappresenta un formidabile
insegnamento, sul quale, in un'era caratterizzata dagli effetti della pandemia su Bergamo, è valsa la pena ritornare. Nel testo i contributi dell'autore e di Francesca Zanotto, assegnista di ricerca in questo progetto, sono stati dedicati alla ricostruzione delle vicende architettoniche e urbanistiche che hanno caratterizzato il rapporto teatro/città e alla ricognizione sugli archivi della Fondazione, che conservano la documentazione sulle eccezionali scenografie realizzate nell'ambito dell'iniziativa nota come Teatro delle Novità
La casa dei Casti Amanti. Restauro a Pompei
No full textNel testo sono illustrati i risultati di un progetto di ricerca riguardante Casa dei Casti Amanti del sito archeologico di Pompei ed avendo per oggetto l'applicazione di studi, rilievi ed indagini sul complesso archeologico
Analisi della vegetazione del distretto minerario di Montevecchio (Sardegna sud-occidentale)
No full textMontevecchio (SW-Sardinia) are presented. The statistic analysis of the relevés let to recognize 14 plant communities. The hygrophilous communities
have been ascribed to the class Phragmito-Magnocaricetea, the hemicryptophytic mesohygrophilous ones to Juncetea maritimi, the therophytic to
Tuberarietea guttatae and the hemicryptophytic mesoxerophilous to Lygeo-Stipetea.
The most interesting vegetation types turned out to be the chamaephytic and nanophanerophytic ones, both kinds are belonging to sardo-corsican
endemic alliances: Ptilostemono casabonae-Euphorbion cupanii and Teucrion mari, respectively. The first alliance comprises pebble vegetation with
distinctive ecological preferences, as they are able to colonize substrata polluted by heavy metal, with low pH values. Within this alliance, 4 new
associations have been recognized: Scrophularietum bicoloris, Dactylo hispanicae-Helichrysetum tyrrhenici, Mercurialido corsicae-Euphorbietum
cupanii and Dauco maritimi-Dittrichietum viscosae, the latter with two subassociations (typicum and rumicetosum glaucescentis). As to the Teucrion
mari, 1 new association and 1 subassociation have been described (Helichryso tyrrhenici-Genistetum sulcitanae and Stachydi glutinosae-Genistetum
corsicae euphorbietosum cupanii), found on aged mining dumps, where the long abandonment made possible the beginning of the pedogenetic
processes.
The present study let to reconstruct the vegetation dynamics, that in the mining areas are clearly differing from the surrounding territory. It was
possible to identify two special series, strictly related to these habitats and verging to the establishment of plant communities pertaining to the
climatophilous series: the first is developing on coarse, hard-sloping debris, with very low water retention; the second is developing on fine-grained
and coherent materials, found on flattened or gently-sloping sites, with high edaphic humidity. In wetlands, it was also possible to identify an
edaphohygrophilous series and a geoseries of endoreic water bodies, not exclusive of the mining habitats
La diplomazia poetica parallela di Giambattista Casti, tra Vienna e l'Europa
No full textIl contributo considera la vicenda europea di Giambattista Casti, la cui carriera poetica si costruisce all'ombra delle corti e al servizio di diplomatici, attivi in particolare nella rete asburgica. Casti definisce attraverso la sua frequentazione del mondo della politica, che lo porta a entrare in contatto con le principali corti europee, dalla Russia al Portogallo, una sua personale idea della diplomazia e della funzione dei letterati che affiancano gli uomini di potere. La poesia diventa così una forza di intervento militante, che interviene a correggere le storture delle dinamiche storiche e a richiamare i lettori sui valori forti della cultura dei lumi come la pace e la tolleranza
Bilateral asymmetry identification for the early detection of breast cancer
No full textBreast cancer is the second most common cancer overall and the leading cause of cancer deaths in women. Mammography is, at present, the only viable method for detecting most of tumors early enough for effective treatment. The secret of setting up the accurate diagnosis is to detect and understand the most subtle signs of breast lesions. Analysis of asymmetry between the left and right mammograms can provide clues about the presence of early signs of tumors. In this work we present an automated procedure for bilateral asymmetry detection composed of the following steps: (1) mammography density analysis and fibro-glandular disc detection through adaptive clustering techniques, (2) analysis and implementation of bilateral asymmetries detection algorithms based on Gabor filters analysis, (3) use of a linear Bayes classifier with the leave-one-out method to asses the asymmetry degree of the two breasts, (4) metrological evaluation of the whole system through random and systematic measurement uncertainty contributions modeling
Integration of vegetational and multitemporal analysis: a case study in the abandoned mine district of Montevecchio (South-western Sardinia)
No full textIn this paper the authors analyse the land cover transformation in the mine district of Montevecchio,
through the integration of vegetational and multitemporal landscape analysis. For this
purpose, three important dates (1955, 1977, 2000) of the district history have been considered and
two different periods are analysed (1955-1977 and 1977-2000). Multitemporal analysis was carried
out through the study of aerial photographs which resulted in the production of three 1:10.000
land cover maps. Vegetational data were obtained through the phytosociological study of the area.
The results show the evolution of the natural vegetation as general trend in the territory. Particular
analysis was carried out on the mining areas (mining dumps, surface mines and tailing dams) to
understand how much and how have been re-colonized by the native vegetation. For the mining
dumps the main transformations are towards the mediterranean maquis, the garrigue and the corkoak
woods. The surface mines was stable in the first period for 73.6% and the main changes are
due to the diffusion of natural vegetation (e.g. to mediterranean maquis 14.7%). With regard to the
tailing dams we observed an increase of stability (from 81.6% to 96.1%) together with a global
increase of surface from 1955 to 2000. Therefore, the integration of the multitemporal and the
vegetational analysis made possible to register a significant evolution of the vegetation cover on
incoherent and polluted materials in relatively short times
Analisi della vegetazione del distretto minerario di Montevecchio (Sardegna sud-occidentale)
No full textThe results of a phytosociological research on the mining habitats of
Montevecchio (SW-Sardinia) are presented. The statistic analysis of the relevés let to recognize 14 plant communities. The hygrophilous communities
have been ascribed to the class Phragmito-Magnocaricetea, the hemicryptophytic mesohygrophilous ones to Juncetea maritimi, the therophytic to
Tuberarietea guttatae and the hemicryptophytic mesoxerophilous to Lygeo-Stipetea.
The most interesting vegetation types turned out to be the chamaephytic and nanophanerophytic ones, both kinds are belonging to sardo-corsican
endemic alliances: Ptilostemono casabonae-Euphorbion cupanii and Teucrion mari, respectively. The first alliance comprises pebble vegetation with
distinctive ecological preferences, as they are able to colonize substrata polluted by heavy metal, with low pH values. Within this alliance, 4 new
associations have been recognized: Scrophularietum bicoloris, Dactylo hispanicae-Helichrysetum tyrrhenici, Mercurialido corsicae-Euphorbietum
cupanii and Dauco maritimi-Dittrichietum viscosae, the latter with two subassociations (typicum and rumicetosum glaucescentis). As to the Teucrion
mari, 1 new association and 1 subassociation have been described (Helichryso tyrrhenici-Genistetum sulcitanae and Stachydi glutinosae-Genistetum
corsicae euphorbietosum cupanii), found on aged mining dumps, where the long abandonment made possible the beginning of the pedogenetic
processes.
The present study let to reconstruct the vegetation dynamics, that in the mining areas are clearly differing from the surrounding territory. It was
possible to identify two special series, strictly related to these habitats and verging to the establishment of plant communities pertaining to the
climatophilous series: the first is developing on coarse, hard-sloping debris, with very low water retention; the second is developing on fine-grained
and coherent materials, found on flattened or gently-sloping sites, with high edaphic humidity. In wetlands, it was also possible to identify an
edaphohygrophilous series and a geoseries of endoreic water bodies, not exclusive of the mining habitats
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