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  1. Book ; Online: MIND

    Bonato, Jacopo / Pelosin, Francesco / Sabetta, Luigi / Nicolosi, Alessandro

    Multi-Task Incremental Network Distillation

    2023  

    Abstract: The recent surge of pervasive devices that generate dynamic data streams has underscored the necessity for learning systems to adapt continually to data distributional shifts. To tackle this challenge, the research community has put forth a spectrum of ... ...

    Abstract The recent surge of pervasive devices that generate dynamic data streams has underscored the necessity for learning systems to adapt continually to data distributional shifts. To tackle this challenge, the research community has put forth a spectrum of methodologies, including the demanding pursuit of class-incremental learning without replay data. In this study, we present MIND, a parameter isolation method that aims to significantly enhance the performance of replay-free solutions and achieve state-of-the-art results on several widely studied datasets. Our approach introduces two main contributions: two alternative distillation procedures that significantly improve the efficiency of MIND increasing the accumulated knowledge of each sub-network, and the optimization of the BachNorm layers across tasks inside the sub-networks. Overall, MIND outperforms all the state-of-the-art methods for rehearsal-free Class-Incremental learning (with an increment in classification accuracy of approx. +6% on CIFAR-100/10 and +10% on TinyImageNet/10) reaching up to approx. +40% accuracy in Domain-Incremental scenarios. Moreover, we ablated each contribution to demonstrate its impact on performance improvement. Our results showcase the superior performance of MIND indicating its potential for addressing the challenges posed by Class-incremental and Domain-Incremental learning in resource-constrained environments.

    Comment: Accepted at the 38th AAAI Conference on Artificial Intelligence
    Keywords Computer Science - Computer Vision and Pattern Recognition ; Computer Science - Machine Learning
    Subject code 006
    Publishing date 2023-12-05
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Book ; Online: DUCK

    Cotogni, Marco / Bonato, Jacopo / Sabetta, Luigi / Pelosin, Francesco / Nicolosi, Alessandro

    Distance-based Unlearning via Centroid Kinematics

    2023  

    Abstract: Machine Unlearning is rising as a new field, driven by the pressing necessity of ensuring privacy in modern artificial intelligence models. This technique primarily aims to eradicate any residual influence of a specific subset of data from the knowledge ... ...

    Abstract Machine Unlearning is rising as a new field, driven by the pressing necessity of ensuring privacy in modern artificial intelligence models. This technique primarily aims to eradicate any residual influence of a specific subset of data from the knowledge acquired by a neural model during its training. This work introduces a novel unlearning algorithm, denoted as Distance-based Unlearning via Centroid Kinematics (DUCK), which employs metric learning to guide the removal of samples matching the nearest incorrect centroid in the embedding space. Evaluation of the algorithm's performance is conducted across various benchmark datasets in two distinct scenarios, class removal, and homogeneous sampling removal, obtaining state-of-the-art performance. We introduce a novel metric, called Adaptive Unlearning Score (AUS), encompassing not only the efficacy of the unlearning process in forgetting target data but also quantifying the performance loss relative to the original model. Moreover, we propose a novel membership inference attack to assess the algorithm's capacity to erase previously acquired knowledge, designed to be adaptable to future methodologies.
    Keywords Computer Science - Computer Vision and Pattern Recognition ; Computer Science - Machine Learning
    Subject code 006
    Publishing date 2023-12-04
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Preliminary epidemiological analysis on children and adolescents with novel coronavirus disease (2019-nCoV) in a central area of Calabria region.

    Talarico, Valentina / Nicoletti, Angela / Sabetta, Lucilla / Minchella, Pasquale / Raiola, Giuseppe

    Acta bio-medica : Atenei Parmensis

    2020  Volume 91, Issue 2, Page(s) 232–233

    Abstract: not available. ...

    Abstract not available.
    MeSH term(s) Adolescent ; Betacoronavirus ; COVID-19 ; COVID-19 Testing ; Child ; Clinical Laboratory Techniques ; Coronavirus Infections/diagnosis ; Coronavirus Infections/epidemiology ; Female ; Humans ; Italy/epidemiology ; Male ; Pandemics ; Pneumonia, Viral/diagnosis ; Pneumonia, Viral/epidemiology ; SARS-CoV-2
    Keywords covid19
    Language English
    Publishing date 2020-05-11
    Publishing country Italy
    Document type Letter
    ZDB-ID 2114240-3
    ISSN 2531-6745 ; 0392-4203
    ISSN (online) 2531-6745
    ISSN 0392-4203
    DOI 10.23750/abm.v91i2.9550
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Preliminary epidemiological analysis on children and adolescents with novel coronavirus disease (2019-nCoV) in a central area of Calabria region

    Talarico, Valentina / Nicoletti, Angela / Sabetta, Lucilla / Minchella, Pasquale / Raiola, Giuseppe

    Acta Biomed

    Abstract: not available. ...

    Abstract not available.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #32420955
    Database COVID19

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  5. Article ; Online: Screening of COVID-19 in children admitted to the hospital for acute problems: preliminary data.

    Nicoletti, Angela / Talarico, Valentina / Sabetta, Lucilla / Minchella, Pasquale / Colosimo, Manuela / Fortugno, Carmelo / Galati, Maria Concetta / Raiola, Giuseppe

    Acta bio-medica : Atenei Parmensis

    2020  Volume 91, Issue 2, Page(s) 75–79

    Abstract: Background: The new Coronavirus identified in Whuan at the end of 2019 (SARS-CoV-2) belongs to the Beta Coronavirus genus and is responsible for the new Coronavirus 2019 pandemia (COVID-19). Infected children may be asymptomatic or present fever, dry ... ...

    Abstract Background: The new Coronavirus identified in Whuan at the end of 2019 (SARS-CoV-2) belongs to the Beta Coronavirus genus and is responsible for the new Coronavirus 2019 pandemia (COVID-19). Infected children may be asymptomatic or present fever, dry cough, fatigue or gastrointestinal symptoms. The CDC recommends that clinicians should decide to test patients based on the presence of signs and symptoms compatible with COVID-19.
    Material and methods: 42 children (the majority < 5 years of age) were referred, to our Pediatric Department, as possible cases of COVID-19 infection. Blood analysis, chest X-ray, and naso-oropharyngeal swab specimens for viral identification of COVID-19 were requested.
    Results: None of the screened children resulted positive for COVID-19 infection. At first presentation, the most frequent signs and symptoms were: fever (71.4%), fatigue (35.7%) and cough (30.9%).  An  high  C-reactive protein value and abnormalities of chest  X-ray (bronchial wall thickening) were detected in 26.2% and 19% of patients, respectively. Almost half of patients (45.2%) required hospitalization in our Pediatric Unit and one patient in Intensive Care Unit.
    Conclusions: Testing people who meet the COVID-19 suspected case definition criteria is essential for clinical management and outbreak control. Children of all ages can get COVID-19, although they appear to be affected less frequently than adults, as reported in our preliminary survey. Further studies are needed to confirm our observations.
    MeSH term(s) Acute Disease ; Adolescent ; Betacoronavirus ; COVID-19 ; Child ; Child, Preschool ; Coronavirus Infections/complications ; Coronavirus Infections/diagnosis ; Emergency Service, Hospital ; Female ; Gastrointestinal Diseases/virology ; Humans ; Infant ; Infant, Newborn ; Male ; Pandemics ; Patient Admission ; Pneumonia, Viral/complications ; Pneumonia, Viral/diagnosis ; SARS-CoV-2 ; Triage
    Keywords covid19
    Language English
    Publishing date 2020-05-11
    Publishing country Italy
    Document type Journal Article
    ZDB-ID 2114240-3
    ISSN 2531-6745 ; 0392-4203
    ISSN (online) 2531-6745
    ISSN 0392-4203
    DOI 10.23750/abm.v91i2.9607
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.B 925: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Screening of COVID-19 in children admitted to the hospital for acute problems: preliminary data

    Nicoletti, Angela / Talarico, Valentina / Sabetta, Lucilla / Minchella, Pasquale / Colosimo, Manuela / Fortugno, Carmelo / Galati, Maria Concetta / Raiola, Giuseppe

    Acta Biomed

    Abstract: BACKGROUND: The new Coronavirus identified in Whuan at the end of 2019 (SARS-CoV-2) belongs to the Beta Coronavirus genus and is responsible for the new Coronavirus 2019 pandemia (COVID-19). Infected children may be asymptomatic or present fever, dry ... ...

    Abstract BACKGROUND: The new Coronavirus identified in Whuan at the end of 2019 (SARS-CoV-2) belongs to the Beta Coronavirus genus and is responsible for the new Coronavirus 2019 pandemia (COVID-19). Infected children may be asymptomatic or present fever, dry cough, fatigue or gastrointestinal symptoms. The CDC recommends that clinicians should decide to test patients based on the presence of signs and symptoms compatible with COVID-19. MATERIAL AND METHODS: 42 children (the majority < 5 years of age) were referred, to our Pediatric Department, as possible cases of COVID-19 infection. Blood analysis, chest X-ray, and naso-oropharyngeal swab specimens for viral identification of COVID-19 were requested. RESULTS: None of the screened children resulted positive for COVID-19 infection. At first presentation, the most frequent signs and symptoms were: fever (71.4%), fatigue (35.7%) and cough (30.9%). An high C-reactive protein value and abnormalities of chest X-ray (bronchial wall thickening) were detected in 26.2% and 19% of patients, respectively. Almost half of patients (45.2%) required hospitalization in our Pediatric Unit and one patient in Intensive Care Unit. CONCLUSIONS: Testing people who meet the COVID-19 suspected case definition criteria is essential for clinical management and outbreak control. Children of all ages can get COVID-19, although they appear to be affected less frequently than adults, as reported in our preliminary survey. Further studies are needed to confirm our observations.
    Keywords covid19
    Publisher WHO
    Document type Article
    Note WHO #Covidence: #32420929
    Database COVID19

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  7. Article: Colonization of ephemeral detrital patches by vagile macroinvertebrates in a brackish lake: a body size-related process?

    Mancinelli, Giorgio / Sabetta, Letizia / Basset, Alberto

    Oecologia

    2007  Volume 151, Issue 2, Page(s) 292–302

    Abstract: The mechanisms regulating the build-up of invertebrate assemblages on ephemeral detritus patches are still poorly understood. Here, the daily colonization of decaying reed leaves by vagile macroinvertebrates was monitored in an brackish lake in Italy. ... ...

    Abstract The mechanisms regulating the build-up of invertebrate assemblages on ephemeral detritus patches are still poorly understood. Here, the daily colonization of decaying reed leaves by vagile macroinvertebrates was monitored in an brackish lake in Italy. The highly variable abundance patterns of dominant taxa were analysed by spectral and geostatistical techniques to test for nonrandomness and to further determine whether they were related to body size. Comparisons between two contrasting sites allowed an assessment of the generality of our observations. At both sites, the macroinvertebrate assemblage was dominated by three detritivorous taxa, i.e. the isopod Lekanesphaera monodi, the amphipod Microdeutopus gryllotalpa and the polychaete Neanthes caudata. Overall, their abundance patterns were characterised by short-term fluctuations of a nonrandom, autocorrelated nature. In addition, a significant covariation was observed between the average body mass of each taxon and the complexity of the respective abundance pattern, expressed by the fractal dimension D. The covariation was observed at both study sites, notwithstanding the diverging outcomes of bivariate pattern comparisons for similar-sized taxa. Our findings indicate that the size of macroinvertebrates is strongly related to the short-term dynamics of their abundance patterns on reed detritus, suggesting that the interaction between vagile consumers and ephemeral resource patches might be influenced by individual energetics. The implications of size-related constraints for the coexistence of species on decaying detrital patches are discussed.
    MeSH term(s) Analysis of Variance ; Animals ; Body Weight ; Ecosystem ; Fresh Water ; Invertebrates/growth & development ; Italy ; Plant Leaves ; Population Dynamics ; Species Specificity ; Time Factors
    Language English
    Publishing date 2007-03
    Publishing country Germany
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 123369-5
    ISSN 1432-1939 ; 0029-8549
    ISSN (online) 1432-1939
    ISSN 0029-8549
    DOI 10.1007/s00442-006-0586-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Bonn / Germany

    Z 70/109: Show issues

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  8. Article: Phytoplankton size structure in transitional water ecosystems: a comparative analysis of descriptive tools

    Sabetta, L / Vadrucci, M.R / Fiocca, A / Stanca, E / Mazziotti, C / Ferrari, C / Cabrini, M / Kongjka, E / Basset, A

    Aquatic conservation marine and freshwater ecosystems. 2008 Aug., v. 18, no. S1

    2008  

    Abstract: 1.Individual size has important implications for the physiology and ecology of phytoplankton. The analysis of size structure is a common approach for studying structure and function of planktonic ecosystems, with applications for the monitoring and ... ...

    Abstract 1.Individual size has important implications for the physiology and ecology of phytoplankton. The analysis of size structure is a common approach for studying structure and function of planktonic ecosystems, with applications for the monitoring and conservation of aquatic ecosystem health. Several ways to describe the size structure of phytoplankton communities are used, including size-abundance relationships (SAR), non-normalized and normalized biomass size spectra (BSS), non-normalized and normalized number size spectra (NSS).2.The main goal of this study was to test the effectiveness of the different tools proposed for describing and monitoring phytoplankton guilds in transitional waters. Comparative analyses were undertaken to evaluate (a) the consistency of each tool in describing the phytoplankton guilds, in terms of statistical significance and agreement with theoretical expectations; and (b) the effectiveness of each tool to discriminate conditions/cases.3.Eleven transitional water bodies occurring along the eastern and western coasts of the Adriatic Basin were sampled in autumn 2004 and spring 2005.4.Results obtained highlight that: (1) NSS globally showed higher statistical goodness of fit than BSS; (2) slopes of BSS and NSS, both normalized and non-normalized, were less negative than expected following the linear biomass hypothesis; and (3) the non-normalized NSS shape descriptors were best able to discriminate environmental heterogeneity both between and within transitional water ecosystems.5.Parameters of NSS are suggested to be consistent descriptors of phytoplankton size structure and potentially important tools for monitoring and conservation of transitional water ecosystems. Copyright © 2008 John Wiley & Sons, Ltd.
    Keywords autumn ; coasts ; ecosystems ; monitoring ; physiology ; phytoplankton ; spring ; surface water
    Language English
    Dates of publication 2008-08
    Size p. S76-S87.
    Publishing place John Wiley & Sons, Ltd.
    Document type Article
    ZDB-ID 1146285-1
    ISSN 1052-7613
    ISSN 1052-7613
    DOI 10.1002/aqc.954
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Variation of structural and functional metrics in macrophyte communities within two habitats of eastern Mediterranean coastal lagoons: natural versus human effects

    Orfanidis, S / Pinna, M / Sabetta, L / Stamatis, N / Nakou, K

    Aquatic conservation marine and freshwater ecosystems. 2008 Aug., v. 18, no. S1

    2008  

    Abstract: 1.The variation of structural (multi-dimensional scaling plot of Bray-Curtis similarity, species number, Shannon-Weaver index, percentage coverage) and functional (Ecological State Group (ESG) I percentage coverage, ESG II percentage coverage, Ecological ...

    Abstract 1.The variation of structural (multi-dimensional scaling plot of Bray-Curtis similarity, species number, Shannon-Weaver index, percentage coverage) and functional (Ecological State Group (ESG) I percentage coverage, ESG II percentage coverage, Ecological Evaluation Index (EEI)) metrics in benthic macrophyte communities was studied in two different habitats: (a) mud with submerged angiosperms (MA), and (b) mud with macroalgae (MM), in three eastern Mediterranean coastal lagoons. One lagoon was in northern Greece (Agiasma, Nestos Delta, Eastern Macedonia region) and two in south-eastern Italy (Cesine and Margherita of Savoia, Apulian region).2.The aim was to differentiate metric variation caused by human or natural processes and thereby to (1) select reliable metrics and (2) develop user-friendly protocols for cost-effective monitoring programmes for coastal lagoon water quality.3.Eight different sites dominated by macrophyte communities characterized by two angiosperms (Ruppia cirrhosa and R. maritima), two opportunistic macroalgae (Ulva sp. and Chaetomorpha linum), and Cyanobacteria colonies were quantitatively and destructively sampled twice.4.Structural metrics showed highest heterogeneity at a local site-specific scale, while functional metrics showed highest heterogeneity at the scale of habitat. As a result the structural metrics appeared inappropriate as indicators of lagoon water quality changes. By contrast shifts of habitat dominated by angiosperms to opportunistic macroalgae owing to nutrient excess, especially nitrogen, can be identified by functional metrics, especially with EEI. Copyright © 2008 John Wiley & Sons, Ltd.
    Keywords Chaetomorpha ; Cyanobacteria ; Ruppia ; Ulva ; habitats ; humans ; macroalgae ; nitrogen ; nutrient excess ; water quality ; Greece ; Italy ; Macedonia
    Language English
    Dates of publication 2008-08
    Size p. S45-S61.
    Publishing place John Wiley & Sons, Ltd.
    Document type Article
    ZDB-ID 1146285-1
    ISSN 1052-7613
    ISSN 1052-7613
    DOI 10.1002/aqc.957
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Statistical evaluation of differences in phytoplankton richness and abundance as constrained by environmental drivers in transitional waters of the Mediterranean basin

    Vadrucci, M.R / Sabetta, L / Fiocca, A / Mazziotti, C / Silvestri, C / Cabrini, M / Guardiani, B / Konjka, E / Evangelopoulos, A / Koutsoubas, D / Basset, A

    Aquatic conservation marine and freshwater ecosystems. 2008 Aug., v. 18, no. S1

    2008  

    Abstract: 1. This paper is focused on the identification of patterns of variation in phytoplankton abundance and taxonomic composition at the eco-regional scale. In addition, these patterns were evaluated with respect to climatic, hydrological and physiographic ... ...

    Abstract 1. This paper is focused on the identification of patterns of variation in phytoplankton abundance and taxonomic composition at the eco-regional scale. In addition, these patterns were evaluated with respect to climatic, hydrological and physiographic drivers.2. A hierarchical sampling design was used to integrate seasonal and spatial variations in taxonomic richness, abundance and taxonomic composition of phytoplankton guilds. Data were collected synoptically during two seasons (autumn and spring) in 12 transitional water bodies in Italy, Albania and Greece.3. The number of taxa and the cell density of phytoplankton guilds varied between seasons and across ecosystems. Overall, physiographic and hydrological components accounted for 61% of the variation in the number of taxa, but just 19% of the variation in cell density.4. At the univariate level, cell density varied significantly with temperature, whereas the number of taxa was found to vary significantly with depth, sinuosity index and outlet structure, lagoon surface area and geographic location.5. The taxonomic composition of phytoplankton guilds varied markedly among lagoons. More than 61% of the 242 taxa identified overall were detected in only one of the lagoons.6. The average similarity of phytoplankton taxonomic structure among ecosystems was 33.15 ± 15.02. Taxonomic similarity varied substantially across both ecosystems and seasons. Overall, more than 70% of variance in taxonomic similarity was explained by physiographic and hydrological forcing factors. Specifically, differences in taxonomic structure were found in transitional ecosystems showing differences in outlet structure, depth and salinity, as well as geographic location. A recurrent pattern of decreasing taxonomic similarity with increasing Euclidean distance was observed for each factor.7. The results obtained in this study suggest that certain large-scale driving forces can explain eco-regional scale patterns of species richness and taxonomic composition but not of cell abundance, which are probably more affected by local forcing factors. Copyright © 2008 John Wiley & Sons, Ltd.
    Keywords autumn ; ecosystems ; phytoplankton ; salinity ; species diversity ; spring ; surface area ; surface water ; temperature ; variance ; Albania ; Italy
    Language English
    Dates of publication 2008-08
    Size p. S88-S104.
    Publishing place John Wiley & Sons, Ltd.
    Document type Article
    ZDB-ID 1146285-1
    ISSN 1052-7613
    ISSN 1052-7613
    DOI 10.1002/aqc.951
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

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