0000000000819102
AUTHOR
C. Militello
An edge-driven 3D region growing approach for upper airways morphology and volume evaluation in patients with Pierre Robin sequence
In this paper, a semi-automatic approach for segmentation of the upper airways is proposed. The implemented approach uses an edge-driven 3D region-growing algorithm to segment ROIs and 3D volume-rendering technique to reconstruct the 3D model of the upper airways. This method can be used to integrate information inside a medical decision support system, making it possible to enhance medical evaluation. The effectiveness of the proposed segmentation approach was evaluated using Jaccard (92.1733%) and dice (94.6441%) similarity indices and specificity (96.8895%) and sensitivity (97.6682%) rates. The proposed method achieved an average computation time reduced by a 16x factor with respect to m…
VALUTAZIONE DEL COMPORTAMENTO ALL’IMPATTO DI BIOCOMPOSITI RINFORZATI CON FIBRE DI AGAVE
The growing attention on environmental issues has led to a recent research interest in eco-sustainable and renewable materials, among which biocomposites play an important role. Biocomposites are materials consisting of a matrix with low environmental impact or renewable, reinforced with natural fibres. Several research activities reported in literature, deal mainly with the static mechanical properties. Just few works are instead devoted to the assessment of their dynamic properties, such as fatigue strength, impact strength, etc. In order to give a contribution to the knowledge of the impact behaviour of green epoxy matrix biocomposites reinforced with agave fibres, in this paper a system…
Resource-efficient hardware implementation of a neural-based node for automatic fingerprint classification
Modern mobile communication networks and Internet of Things are paving the way to ubiquitous and mobile computing. On the other hand, several new computing paradigms, such as edge computing, demand for high computational capabilities on specific network nodes. Ubiquitous environments require a large number of distributed user identification nodes enabling a secure platform for resources, services and information management. Biometric systems represent a useful option to the typical identification systems. An accurate automatic fingerprint classification module provides a valuable indexing scheme that allows for effective matching in large fingerprint databases. In this work, an efficient em…
RESISTENZA ALLA FRATTURA TRANSLAMINARE DI BIOCOMPOSITI RINFORZATI CON FIBRE DI AGAVE
Data la crescente attenzione nei confronti dell’ambiente, le sempre più restrittive norme in materia di salvaguardia ambientale e di riciclo dei materiali hanno portato ad un notevole interesse dei ricercatori verso i biocompositi, materiali costituiti da rinforzi di origine naturale e matrici a basso impatto ambientale. Nonostante molteplici studi siano stati indirizzati a tali materiali innovativi, allo stato attuale poche ricerche hanno riguardato l’analisi della tenacità alla frattura di laminati biocompositi. Il presente lavoro propone pertanto uno studio sperimentale del comportamento alla frattura translaminare in modo I di laminati biocompositi in fibre di agave e matrice epossidica…
MIGLIORAMENTO DELLE PRESTAZIONI MECCANICHE DI BIOCOMPOSITI RINFORZATI CON FIBRE DI AGAVE MEDIANTE BASSE CONCENTRAZIONI DI BIOCHAR
Biocarbon is finding increasing applications in polymer composites, thanks to its reinforcing action and increased electrical and thermal properties. In this study it was added as a filler in a biocomposite reinforced with natural fibers to investigate its effect on static resistance and fatigue lifetime. Biocomposites are increasingly used in the industry for the replacement of synthetic materials, thanks to their good mechanical properties. Unfortunately, in several potential fields of application the static strength and the fatigue life of these materials are not high enough. For this reason, several chemical treatments on the fibers have been proposed, although still without fully satis…
CARATTERIZZAZIONE ALL’IMPATTO DI COMPOSITI IBRIDI CARBONIO-ARAMIDE USATI PER LA REALIZZAZIONE DI COMPONENTI DI AUTOVETTURE SPORTIVE
Through a systematic experimental analysis, the impact characterization of carbon-aramid hybrid composites, typically used in the automotive sports field, has been performed. CFRP laminates object of this study have been produced by adding a hybrid foil obtained using a fabric of twill type, so-called carbon-kevlar. In order to highlight the effects of hybridisation, that is, the different properties of kevlar fibre with respect to carbon, a comparative analysis was also carried out considering a CFRP laminate with the same lay-up. The analysis of the experimental results obtained through preliminary tensile tests and subsequent low-velocity drop-weight impact tests integrated with x-ray to…
A fast fusion technique for fingerprint and iris spatial descriptors in multimodal biometric systems
Multimodal biometric identification systems aim to combine two or more physical or behavioral traits to provide optimal False Acceptance Rate (FAR) and False Rejection Rate (FRR). In this paper a new fusion technique for fingerprint and iris spatial descriptors with a low execution time is presented. The report focuses on spatial fusion strategies, offering and proposing a modern perspective on multi-biometrics. In greater detail, a spatial-based approach and a homogeneous biometric vector, integrating iris and fingerprint data, are generated, fused, and processed for the overall system matching score. The goal of this approach is to demonstrate that, by using spatial iris features followin…
An embedded iris recognizer for portable and mobile devices
Software-intensive systems play an increasingly dominant role in our lives and daily activities. Several applications, in which a timely response to user and environment stimulus is essential, require real-time software intensive systems. Computation-intensive applications, such as video compression, control systems, security systems, result in significant growth for processor workload. To address the above issues, one possible solution is to design embedded specialized components. At the same time, the integration of new features in portable and mobile devices is rapidly increasing. Several services and applications require robust user authentication for access to services, data, and resou…