265 research outputs found
Digitalizzazione, tecnologia e industria assicurativa
No full textIl volume focalizza l’attenzione sull’impatto che le digital technologies stanno determinando sui business models delle banche. Seguendo un approccio di tipo top-down, il volume consente di cogliere la portata pervasiva del cambiamento tecnologico, che sta interessando gli operatori e che influenza i processi di governance, organizzativi e commerciali nelle principali aree di intermediazione finanziaria (pagamenti, crediti, consulenza finanziaria e assicurativa). Il lavoro svolto sul piano accademico è arricchito dalle testimonianze, dal confronto professionale e dall’analisi di casi, che consentono di offrire un approfondimento delle tematiche trattate coerente con le problematiche applicative sul piano gestionale e operativo. A ciò si aggiungono i contributi diretti di alcuni importanti attori del mercato italiano, quali Intesa Sanpaolo, Gruppo Sella, Banca Popolare di Puglia e Basilicata, Credimi, illimity e Supernovae Labs, che hanno evidenziato l’impegno e l’esperienza aziendale maturata sul fronte della digital transformation offrendo esempi, riflessioni e punti di vista interessanti sulle direzioni del cambiamento in atto
Neural and contractile determinants of burst-like explosive isometric contractions of the knee extensors
No full textWalking and running are based on rapid burst-like muscle contractions. Burst-like contractions generate a Gaussian-shaped force profile, in which neuromuscular determinants have never been assessed. We investigated the neural and contractile determinants of the rate of force development (RFD) in burst-like isometric knee extensions. Together with maximal voluntary force (MVF), voluntary and electrically evoked (8 stimuli at 300 Hz, octets) forces were measured in the first 50, 100 and 150 ms of burst-like quadriceps contractions in 24 adults. High-density surface electromyography (HDsEMG) was adopted to measure the root mean square (RMS) and muscle fiber conduction velocity (MFCV) from the vastus lateralis and medialis. The determinants of voluntary force at 50, 100 and 150 ms were assessd by stepwise multiple regression analysis. Force at 50 ms was explained by RMS (R2 = 0.361); force at 100 ms was explained by octet (R2 = 0.646); force at 150 ms was explained by MVF (R2 = 0.711) and octet (R2 = 0.061). Peak RFD (which occurred at 60 ± 10 ms from contraction onset) was explained by MVF (R2 = 0.518) and by RMS50 (R2 = 0.074). MFCV did not emerge as a determinant of RFD. Muscle excitation was the sole determinant of early RFD (50 ms), while contractile characteristics were more relevant for late RFD (≥100 ms). As peak RFD is mostly determined by MVF, it may not be more informative than MVF itself. Therefore, a time-locked analysis of RFD provides more insights into the neuromuscular characteristics of explosive contractions
PORE-SCALE SIMULATION OF LAMINAR FLOW THROUGH A SAMPLE OF ALUMINUM FOAM
No full textOpen-cell metal foams are used in a growing number of applications like lightweight porous structures, enhanced heat transfer devices and compact heat exchangers, catalytic reactors, and even rotors of centrifugal compressors. In many cases, pressure drops and flow rates through the metal foams are predicted using the macroscopic Darcy−Forchheimer equation. Values obtained can be accurate enough for applications, provided the hydraulic properties of the foam are known. The present work is aimed to describe a numerical approach for calculating the hydraulic permeability and the Ergun coefficient of a real sample of metal foam starting from an x-ray tomography of the sample. Fluid dynamic simulations are conducted in the digital sample at the scale of the pores and data obtained are postprocessed to obtain the main hydraulic properties of the porous material
Il disagio inavvertito. Una ricerca sul disagio derivante dallo svolgimento della normale attività didattica
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