Search results for "Hf"
showing 10 items of 909 documents
Digital Business Value Creation with Robotic Process Automation (RPA) in Northern and Central Europe
2018
In the rapidly changing global economy, robotics process automation (rpa) became one of the most important and fastest growing concepts. Digital value co-creation within service businesses and networks, sets value for end customer experience within more efficient operations, focusing on core business development with the use of modern technology. This pilot study approaches the topic from the practical perspective, presenting the results of empirical work conducted with experts working at the Intelligent Automation unit at one of the leading Nordic providers of financial and accounting services. It is examining the RPA transformation from the perspective of its impact on resourcing, operati…
CALYPSO: LA RETE RADAR HF PER IL MONITORAGGIO DELLE CORRENTI MARINE SUPERFICIALI NEL CANALE TRA LA SICILIA E MALTA (MAR MEDITERRANEO)
2018
Il canale tra le isole di Sicilia e Malta si trova in una delle principali rotte marittime del Mediterraneo e in una regione strategica per le piattaforme di estrazione petrolifera, quindi seriamente esposta al rischio di eventi di sversamento di idrocarburi in mare. Ciò può costituire una grave minaccia agli ecosistemi locali e alle attività economiche, tra le quali il turismo e la pesca. I danni derivanti da un eventuale sversamento sarebbero incalcolabili per l'arcipelago maltese, dove le risorse marine ed il turismo rappresentano i principali proventi economici e, in maniera analoga, per la Sicilia. Le misure di prevenzione e di mitigazione, insieme a un rapido intervento e a un process…
Sinergia tra mappe di qualità delle acque e correnti superficiali nella determinazione strutture di circolazione
2014
La mappatura delle variabili di qualità delle acque, quali la clorofilla-a (CHL-a) e la Temperatura Superficiale del mare (SST-Sea Surface Temperature) viene effettuata routinariamente dai sensori satellitari per l’osservazione della terra. I satelliti forniscono una visione sinottica di questi parametri, praticamente in tempo reale e su larga scala. Ad ogni modo, le relazioni tra i parametri di qualità delle acque e le forzanti fisiche che ne determinano le variabilità spazio-temporali, quali campi di vento e di correnti, necessitano uno studio approfondito.
Solid State Properties of Anodic Hf-Nb Mixed Oxides
2016
In last decades, HfO2 and Nb2O5 have been extensively studied due to their many potential applications, from corrosion protection to CMOS (as high-k gate dielectrics) [1-2] and ReRAM technologies [3-4]. For these technological applications compact, uniform and flat oxides are necessary, and a detailed understanding of their physical properties as a function of the fabrication conditions is needful. Scientific community gradually shifted its interest from pure metal oxides to mixed metal oxides trying to exploit the advantages of pure oxides and to suppress their disadvantages. Mixed oxides can be grown on valve metals alloys by anodizing, a simple and low cost electrochemical process for pr…
Performances of a PCB-based Loop Antenna Inductive Sensor for Partial Discharges Detection
2022
This paper presents the test results of an electrically small loop antenna sensor towards detecting the radiated magnetic field due to partial discharge (PD) activities. The loop antenna prototype was printed on an FR-4 substrate with a thickness of 1.6 mm, featuring a compact size of 20 mm times20 mm times1.7 mm. The proposed sensor, initially simulated with Ansys HFSS software, has a resonant frequency of about 100 MHz. Its detection capability for three types of partial discharges (i.e., corona, surface and internal PDs) has been evaluated. Laboratory experiments showed that the evaluated loop spiral antenna is appropriate for the detection of the three types of PDs. Indeed, the results …
An Improved Solver for the M/EEG Forward Problem
2014
Noninvasive investigation of the brain activity via electroencephalography (EEG) and magnetoencephalography (MEG) involves a typical inverse problem whose solution process requires an accurate and fast forward solver. We propose the Method of Fundamental Solutions (MFS) as a truly meshfree alternative to the Boundary Element Method (BEM) for solving the M/EEG forward problem. The solution of the forward problem is obtained, via the Method of Particular Solutions (MPS), by numerically solving a set of coupled boundary value problems for the 3D Laplace equation. Numerical accuracy and computational load are investigated for spherical geometries and comparisons with a state-of-the-art BEM solv…
IL METODO DELLE SOLUZIONI FONDAMENTALI PER LA SOLUZIONE DEL PROBLEMA DIRETTO M/EEG
2015
The research already started on the mesh-free solution of the M / EEG direct problem has led to the development of a solver based on the method of fundamental solutions (MFS, method of fundamental solutions) able to manage the physical-geometric complexity of realistic models of the head more efficiently than traditional.
STIMA DEL POTENZIALE ELETTRICO IN tDCS CON APPROCCIO MESHLESS INNOVATIVO
2015
Transcranial DC stimulation (transcranial Direct Current Stimulation, tDCS) is a non-invasive technique aimed at modifying neuronal activity for the purpose therapeutic and / or for the improvement of mental performance. A continuous current of entity modest (below the threshold of perception) is injected into the brain via electrodes placed on the scalp surface to produce changes in long-term cortical activity. Despite the increasing use of this and other similar techniques, and the relevant ones applications - for example in the field of neuropsychological rehabilitation - their impact on neuronal activity is not yet fully known, mainly due to the difficulty of predict the spatial distrib…
Studi sull’accuratezza numerica di un solutore meshfree per l’approssimazione di campi
2016
L’attività di ricerca è stata finalizzata allo studio di metodologie numeriche avanzate senza reticolazioni per l’approssimazione di funzioni e sue derivate. In particolare si sono condotti studi sull’accuratezza e convergenza del metodo Smoothed Particle Hydrodynamics riferendosi a campionamenti regolari e non