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Dynamic ConvNets on Tiny Devices via Nested Sparsity [article]

Matteo Grimaldi, Luca Mocerino, Antonio Cipolletta, Andrea Calimera
2022 arXiv   pre-print
This work introduces a new training and compression pipeline to build Nested Sparse ConvNets, a class of dynamic Convolutional Neural Networks (ConvNets) suited for inference tasks deployed on resource-constrained devices at the edge of the Internet-of-Things. A Nested Sparse ConvNet consists of a single ConvNet architecture containing N sparse sub-networks with nested weights subsets, like a Matryoshka doll, and can trade accuracy for latency at run time, using the model sparsity as a dynamic
more » ... nob. To attain high accuracy at training time, we propose a gradient masking technique that optimally routes the learning signals across the nested weights subsets. To minimize the storage footprint and efficiently process the obtained models at inference time, we introduce a new sparse matrix compression format with dedicated compute kernels that fruitfully exploit the characteristic of the nested weights subsets. Tested on image classification and object detection tasks on an off-the-shelf ARM-M7 Micro Controller Unit (MCU), Nested Sparse ConvNets outperform variable-latency solutions naively built assembling single sparse models trained as stand-alone instances, achieving (i) comparable accuracy, (ii) remarkable storage savings, and (iii) high performance. Moreover, when compared to state-of-the-art dynamic strategies, like dynamic pruning and layer width scaling, Nested Sparse ConvNets turn out to be Pareto optimal in the accuracy vs. latency space.
arXiv:2203.03324v1 fatcat:vcdq3h3ljzf6jcfoan7zdllphu

ANN based demodulator for UMTS signal measurements

Domenico Luca Carní, Domenico Grimaldi
2006 Measurement (London)  
The paper proposes the use of the Artificial Neural Network (ANN) to design a new demodulator of the telecommunication signals. This demodulator is candidate to be employed into the measurement instrument of the third generation mobile telecommunications UMTS Terrestrial Radio Access. It is developed on the basis of the multiplayer perceptron ANN and it permits to perform in one shot both the descrambling and the despreading operations. Numerical tests performed by using signals according to
more » ... UMTS standard show that the ANN demodulator can guaranty greater accuracy than the traditional one in the case the modulated signal is affected by high level of both noise and distortion.
doi:10.1016/j.measurement.2006.03.017 fatcat:7douy5uuozg2hodjk6kgiy3fle

Nipple-Areola Complex Reconstruction

Andrea Sisti, Edoardo Pica Alfieri, Cesare Brandi, Giuseppe Nisi, Luca Grimaldi
2018 Plastic and Reconstructive Surgery  
The reconstruction of the nipple-areola complex is the last step in the breast reconstruction process. Several techniques have been described over the years. The aim of this review is to provide clarity on the currently available reconstructive options.
doi:10.1097/prs.0000000000004900 pmid:30222673 fatcat:hfyrnkp63zgbdj7xae7t76fcku

Complications associated with brachioplasty: a literature review

Andrea Sisti, Roberto Cuomo, Luca Milonia, Juri Tassinari, Antonio Castagna, Cesare Brandi, Luca Grimaldi, Carlo D'Aniello, Giuseppe Nisi
2018 Acta bio-medica : Atenei Parmensis  
Paralleling the growth of bariatric surgery, the demand for post-bariatric body-contouring surgery is increasing. Weight loss is the main cause, although not the only one, that drives patients to arm lift surgery. Several surgical techniques have been proposed over the years. Our aim was to consider the complications and outcomes according to the performed technique, through a wide review of the literature.
doi:10.23750/abm.v88i4.5609 pmid:29350652 fatcat:yiewmzifgfa4nfc5robfjjvbna

Targeting ADP-ribosylation as an antimicrobial strategy

Giuliana Catara, Annunziata Corteggio, Carmen Valente, Giovanna Grimaldi, Luca Palazzo
2019 Biochemical Pharmacology  
ADP-ribosylation (ADPr) is an ancient reversible modification of cellular macromolecules controlling major biological processes as diverse as DNA damage repair, transcriptional regulation, intracellular transport, immune and stress responses, cell survival and proliferation. Furthermore, enzymatic reactions of ADPr are central in the pathogenesis of many human diseases, including infectious conditions. By providing a review of ADPr signalling in bacterial systems, we highlight the relevance of
more » ... his chemical modification in the pathogenesis of human diseases depending on host-pathogen interactions. The post-antibiotic era has raised the need to find alternative approaches to antibiotic administration, as major pathogens becoming resistant to antibiotics. An in-depth understanding of ADPr reactions provides the rationale for designing novel antimicrobial strategies for treatment of infectious diseases. In addition, the understanding of mechanisms of ADPr by bacterial virulence factors offers important hints to improve our knowledge on cellular processes regulated by eukaryotic homologous enzymes, which are often involved in the pathogenesis of human diseases.
doi:10.1016/j.bcp.2019.06.001 pmid:31176616 pmcid:PMC7172630 fatcat:zmhy6tvyqvgbrguiwugzklhewy

Cardiac cachexia in sub-Saharan Africa

Antonio Grimaldi, Annalisa De Concilio, Luca Marsero, Maxwell Odida
2017 Indian Heart Journal  
doi:10.1016/j.ihj.2017.08.022 pmid:29174259 pmcid:PMC5717311 fatcat:qjrsqvtgvfh7vnulpd674qmudy

Time coordination of standalone measurement instruments by synchronized triggering

Francesco Lamonaca, Domenico Luca Carnì, Domenico Grimaldi
Grimaldi, "New hardware interface to synchronize stand-alone measurement instruments," Proc. of: 20th IMEKO TC4 International Symposium and 18th International Workshop on ADC Modelling and Trends of T  ... 
doi:10.21014/acta_imeko.v4i3.259 fatcat:yv7eoa6frjewdaue7x3joh67i4

Optimization of Prepectoral Breast Reconstruction

Roberto Cuomo, Francesco Ruben Giardino, Alessandro Neri, Giuseppe Nisi, Cesare Brandi, Irene Zerini, Han Jingjian, Luca Grimaldi
2020 Breast Care  
Acellular dermal matrix (ADM) were introduced in the early 2000s and more recently permitted new protocols for breast reconstruction allowing a short operative time with improved outcomes until the new muscle-sparing breast reconstruction proposed in 2014 using the Braxon® ADM. The aim of this research is to propose a technique to improve the aesthetic outcome using Braxon ADM with prepectoral implants. The enrolled patients were submitted to a nipple skin-sparing mastectomy leaving 1
more » ... centimeter of subcutis on the proximal part of the upper pole of the breast (see Surgical Technique). Aesthetic outcomes were compared to those obtained with traditional breast reconstruction with prosthesis and the Braxon ADM placed in the prepectoral space. Mean values of aesthetic outcomes were analyzed using the Student t test, and the κ test was used to analyze interobserver variability. The overall aesthetic score was improved of 29.6% of the patients; in particular the most improved score was that for contour (+98.01%). Statistical significance was found for contour, upper pole definition, and total score average (p < 0.05). The κ test showed interobserver variability with a good level of agreement on contour (κ = 0.832). The proposed technique has allowed attainment of good results in terms of aesthetic outcomes. In a small sample we did not register any particular complications but we verified a better satisfaction on the evaluation of the aesthetic result (level of evidence: 3).
doi:10.1159/000506347 pmid:33716630 pmcid:PMC7923878 fatcat:gqmnx2fjdfdbresf7ysruhpmdy

Voice quality measurement in telecommunication networks by optimized multi-sine signals

Domenico Luca Carnì, Domenico Grimaldi
2008 Measurement (London)  
The paper deals with the test signal selection to be adopted for the Voice Quality Measurement (VQM) in telecommunication networks. It is proposed to use the optimized multisine as test signal in place of both the natural and the artificial voices, suggested by the ITU-T recommendations. The effectiveness of the optimized multisine to the VQM is investigated by using four algorithms: (i) Perceptual Speech Quality Measurement, (ii) Perceptual Speech Quality Measurement plus, (iii) Perceptual
more » ... uation of Speech Quality, and (iv) Perceptual Analysis Measurement System. Numerical tests are performed in order to compare the output index of the four algorithms feed by the optimized multisine, the natural and the artificial voice signals. In order to take into account the effects of the actual telecommunication networks, the Modulated Noise Reference Unit is used to corrupt both the multisine and the voices. The tests show the effectiveness of the proposed approach, based on the use of the optimized multisine, respect to the traditional procedures.
doi:10.1016/j.measurement.2006.11.015 fatcat:4opezzcjujbm7hu7z75cccboqq

Body Contouring Surgery

Irene Zerini, Andrea Sisti, Laura Barberi, Roberto Cuomo, Juri Tassinari, Luca Grimaldi, Carlo D'Aniello, Giuseppe Nisi
2016 Plastic and Reconstructive Surgery, Global Open  
doi:10.1097/gox.0000000000000636 pmid:27257579 pmcid:PMC4874293 fatcat:bqa6qugblzf3tizau7vubsuzj4

Deep plant-derived carbon storage in Amazonian podzols

C. R. Montes, Y. Lucas, O. J. R. Pereira, R. Achard, M. Grimaldi, A. J. Melfi
2011 Biogeosciences  
., 1984; Lucas and Chauvel, 1992) .  ...  ., 1982; Lucas et al., 1987; Veillon, 1991) , Brasil (Lucas et al., 1984 (Lucas et al., , 1988 Chauvel et al., 1987; Volkoff, 1988, 1998; Righi, 1989, 1990; Volkoff et al., 1990; Righi et al., 1990; Dubroeucq  ... 
doi:10.5194/bg-8-113-2011 fatcat:rflfpqsqjfhwrfd674ong2loay

Giant lipoma of the back

Andrea Sisti, Giuseppe Nisi, Cesare Brandi, Carlo D′Aniello, Luca Grimaldi, Roberto Cuomo, Antonio Castagna
2015 Indian Journal of Plastic Surgery  
doi:10.4103/0970-0358.163074 pmid:26424996 pmcid:PMC4564516 fatcat:36xckw7ccvfibnrlhfxbthxs4i

Deep plant-derived carbon storage in Amazonian podzols

C. R. Montes, Y. Lucas, O. J. R. Pereira, R. Achard, M. Grimaldi, A. J. Melfi
2010 Biogeosciences Discussions  
., 1984; Lucas and Chauvel, 1992) .  ...  ., 1982; Lucas et al., 1987; Veillon, 1991) , Brasil (Lucas et al., 1984 (Lucas et al., , 1988 Chauvel et al., 1987; Volkoff, 1988, 1998; Righi, 1989, 1990; Volkoff et al., 1990; Righi et al., 1990; Dubroeucq  ... 
doi:10.5194/bgd-7-7607-2010 fatcat:y6fbk7qydzfzlktllca4qpi7za

Flow Duration Curve from Satellite: Potential of a Lifetime SWOT Mission

Alessio Domeneghetti, Angelica Tarpanelli, Luca Grimaldi, Armando Brath, Guy Schumann
2018 Remote Sensing  
General rights This document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: Abstract: A flow duration curve (FDC) provides a comprehensive description of the hydrological regime of a catchment and its knowledge is fundamental for many water-related applications (e.g., water management and supply, human and irrigation purposes, etc.). However, relying on historical streamflow records,
more » ... are constrained to gauged stations and, thus, typically available for a small portion of the world's rivers. The upcoming Surface Water and Ocean Topography satellite (SWOT; in orbit from 2021) will monitor, worldwide, all rivers larger than 100 m in width (with a goal to observe rivers as small as 50 m) for a period of at least three years, representing a potential groundbreaking source of hydrological data, especially in remote areas. This study refers to the 130 km stretch of the Po River (Northern Italy) to investigate SWOT potential in providing discharge estimation for the construction of FDCs. In particular, this work considers the mission lifetime (three years) and the three satellite orbits (i.e., 211, 489, 560) that will monitor the Po River. The aim is to test the ability to observe the river hydrological regime, which is, for this test case, synthetically reproduced by means of a quasi-2D hydraulic model. We consider different river segmentation lengths for discharge estimation and we build the FDCs at four gauging stations placed along the study area referring to available satellite overpasses (nearly 52 revisits within the mission lifetime). Discharge assessment is performed using the Manning equation, under the assumption of a trapezoidal section, known bathymetry, and roughness coefficient. SWOT observables (i.e., water level, water extent, etc.) are estimated by corrupting the values simulated with the quasi-2D model according to the mission requirements. Remotely-sensed FDCs are compared with those obtained with extended (e.g., 20-70 years) gauge datasets. Results highlight the potential of the mission to provide a realistic reconstruction of the flow regimes at different locations. Higher errors are obtained at the FDC tails, where very low or high flows have lower likelihood of being observed, or might not occur during the mission lifetime period. Among the tested discretizations, 20 km stretches provided the best performances, with root mean absolute errors, on average, lower than 13.3%.
doi:10.3390/rs10071107 fatcat:vvx6ouwx45efrgiion34g2kxwi

Description and preliminary results of a 100 square meter rain gauge

Salvatore Grimaldi, Andrea Petroselli, Luca Baldini, Eugenio Gorgucci
2018 Journal of Hydrology  
Grimaldi et al. / Journal of Hydrology xxx Fig. 4 . 4 (left) Stage-discharge plot: grey values recorded every second, black values averaged over 5 min for each test.  ...  Quantile 5 min 10 min 15 min 30 min 60 min 0.75 0.4 0.7 0.8 1.3 2.0 0.85 0.6 0.9 1.2 2.1 3.2 0.95 1.0 1.5 2.0 3.5 6.1 Please cite this article in press as: Grimaldi, S.,  ... 
doi:10.1016/j.jhydrol.2015.09.076 fatcat:abtnslcjcragdelqfz4pvxdi3q
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