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461 results on '"Giannetti, F"'

103. A deep learning approachfor automatic mapping of poplar plantations using Sentinel-2 imagery

Author

D’Amico, G., Francini, S., Giannetti, F., Vangi, E., Travaglini, D., Chianucci, F., Mattioli, W., Grotti, M., Puletti, N., Corona, P., and Chirici, G.

Abstract

ABSTRACTPoplars are one of the most widespread fast-growing tree species used for forest plantations. Owing to their distinct features (fast growth and short rotation) and the dependency on the timber price market, poplar plantations are characterized by large inter-annual fluctuations in their extent and distribution. Therefore, monitoring poplar plantations requires a frequent update of information – not feasible by National Forest Inventories due to their periodicity – achievable by remote sensing systems applications. In particular, the new Sentinel-2 mission, with a revisiting period of 5 days, represents a potentially efficient tool for meeting this need.In this paper, we present a deep learning approach for mapping poplar plantations using Sentinel-2 time series. A reference dataset of poplar plantations was available for a large study area of more than 46,000 km2in Northern Italy and served as training and testing data. Two classification methods were compared: (1) a fully connected neural network (also called multilayer perceptron), and (2) a traditional logistic regression. The performance of the two approaches was estimated through bootstrapping procedure with a confidence interval of 99%. Results indicated for deep learning an omission error rate of 2.77%±2.76%, showing improvements compared to logistic regression, omission error rate = 8.91%±4.79%.

Published
2021
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105. Diversity reception for advanced multi-satellite networks: A CDMA approach

Author

Colzi, E, Degaudenzi, R, Elia, C, Giannetti, F, and Viola, R

Subjects
Communications And Radar
Abstract

Diversity reception for Synchronous CDMA (S-CDMA) is introduced and analyzed. A Gaussian co-channel synchronous and asynchronous interference approximation is derived to evaluate the effects on the system bit error rate. Numerical results are provided for a simple mobile communication system where the signals transmitted by two distinct satellites in visibility are coherently combined by a three fingers Rake receiver. A second example showing performance of an integrated ground/satellite single frequency network for digital audio broadcasting is presented. Results show the capacity advantage of utilizing S-CDMA in combination with diversity reception.

Published
1993

106. Stima dei danni della tempesta "Vaia" alle foreste in Italia.

Author

Chirici, G., Giannetti, F., Travaglini, D., Nocentini, S., Francini, S., D'Amico, G., Calvo, E., Fasolini, D., Broll, M., Maistrelli, F., Tonner, J., Pietrogiovanna, M., Oberlechner, K., Andriolo, A., Comino, R., Faidiga, A., Pasutto, I., Carraro, G., Zen, S., and Contarin, F.

Abstract

On October 29, 2018, the Vaia storm hits the North-Eastern regions of Italy by wind gusts exceeding 200 km h-1. The forests in these regions have been seriously damaged. This contribution illustrates the methodology adopted in the emergency phase to estimate forest damages caused by Vaia storm, both in terms of damaged forest areas and growing stock volume of fallen trees. 494 Municipalities registered forest damages caused by Vaia, destroyed or intensely damaged forest stands amounted to about 42,500 ha, spread in Trentino Alto Adige, Veneto, Friuli Venezia Giulia, Lombardy and, only marginally, Piedmont and Valle d'Aosta. The growing stock volume of fallen trees was about 8.5 millions m³. [ABSTRACT FROM AUTHOR]

Published
2019
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116. Assessing the bibliometric productivity of forest scientists in Italy

Author

Giannetti F, Chirici G., Paoletti E., Borghetti M., Corona P., and Bucci G.

Subjects
Scientometrics, SCOPUS, Web of Science, Forestry, SCImago
Abstract

Since 2010, the Italian Ministry of University and Research issued new evaluation protocols to select candidates for University professorships and assess the bibliometric productivity of Universities and Research Institutes based on bibliometric indicators, i.e. scientific paper and citation numbers and the h-index. Under this framework, the objective of this study was to quantify the bibliometric productivity of the Italian forest research community during the 2002-2012 period. We examined the following productivity parameters: (i) the bibliometric productivity under the Forestry subject category at the global level; (ii) compared the aggregated bibliometric productivity of Italian forest scientists with scientists from other countries; (iii) analyzed publication and citation temporal trends of Italian forest scientists and their international collaborations; and (iv) characterized productivity distribution among Italian forest scientists at different career levels. Results indicated the following: (i) the UK is the most efficient country based on the ratio between Gross Domestic Spending (GDS) on Research and Development (R&D) and bibliometric productivity under the Forestry subject category, followed by Italy; (ii) Italian forest scientist productivity exhibited a significant positive time trend, but was characterized by high inequality across authors; (iii) one-half of the Italian forest scientist publications were written in collaboration with foreign scientists; (iv) a strong relationship exists between bibliometric indicators calculated by WOS and SCOPUS, suggesting these two databases have the same potential to evaluate the forestry research community; and (v) self-citations did not significantly affect the rank of Italian forest scientists.

Published
2016

120. Advancements in DEMO WCLL breeding blanket design and integration

Author

Martelli, E., primary, Del Nevo, A., additional, Arena, P., additional, Bongiovì, G., additional, Caruso, G., additional, Di Maio, P. A., additional, Eboli, M., additional, Mariano, G., additional, Marinari, R., additional, Moro, F., additional, Mozzillo, R., additional, Giannetti, F., additional, Di Gironimo, G., additional, Tarallo, A., additional, Tassone, A., additional, and Villari, R., additional

Published
2017
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129. Urban forest and air pollutants removal: a matter of quality of life

Author

Bottalico, F, Chirici, G, DE MARCO, A, Garfi', Vittorio, Giannetti, F, Nocentini, S, Paoletti, E, Salbitano, F, Sanesi, G, Serenelli, C, and Travaglini, D.

Subjects
Urban ecology, Human wellbeing, Air quality, Urban forest, Green infrastructure, Human health, Ecosystem services
Published
2015

144. La gestione sostenibile dei sistemi pascolivi italiani. Progetto interregionale 'MASO-GIS. Sviluppo di modelli aziendali sostenibili e multifunzionali per la valorizzazione dei pascoli in aree marginali mediante GIS'. Macroarea Alpi e Appennino settentrionale. Aree studio: Valli del Pinerolese

Author

Bianchi, Marcello, Battaglini, Luca Maria, Berard, S., Brachet Contol, M., Cedrino, M., Ighina, A., Mimosi, Antonio, Zuccon, M., Giordano, Andrea, Canone, Davide, Giai Minietti, D., Giannetti, F., Bocchi, S., and Corradini, E.

Subjects
appennino ligure, Piemonte, Sostenibilità, Valle d'Aosta, pascoli, sistemi zootecnici, sostenibilità, multifunzionalità, pascolo
Published
2009

145. Deciduous shrubs for ozone bioindication: Hibiscus syriacus as an example

Author

Paoletti E., Ferrara A.M., Calatayud V., Cerverò J., Giannetti F., Sanz M.J., and Manning W.J.

Subjects
Tropospheric O-3, Biomonitoring, food and beverages, Ozone sensitivity, Visible injury, Bioindication
Abstract

Ozone-like visible injury was detected on Hibiscus syriacus plants used as ornamental hedges. Weekly spray of the antiozonant ethylenediurea (EDU, 300 ppm) confirmed that the injury was induced by ambient ozone. EDU induced a 75% reduction in visible injury. Injury was more severe on the western than on the eastern exposure of the hedge. This factor of variability should be considered in ozone biomonitoring programmes. Seeds were collected and seedlings were artificially exposed to ozone in filtered vs. not-filtered (+30 ppb) Open-Top Chambers. The level of exposure inducing visible injury in the OTC seedlings was lower than that in the ambient-grown hedge. The occurrence of visible injury in the OTC confirmed that the ozone sensitivity was heritable and suggested that symptomatic plants of this deciduous shrub population can be successfully used as ozone bioindicators. EDU is recommended as a simple too) for diagnosing ambient ozone visible injury on field vegetation.

Published
2009

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