278 research outputs found
Computer crime investigation
No full textNonostante i continui aggiornamenti tecnici e normativi la lotta al crimine informatico presente ancora oggi grosse difficoltà: una volta avviato, sia pure tra mille difficoltà, il lento, ma continuo, cammino che porterà il codice penale ed il codice di procedura penale ad adeguarsi alle nuove tecnologie ci si è, infatti, accorti che il processo relativo a reati informatici solleva nuove problematiche di carattere investigativo, probatorio e processuale, con la conseguenza che lo stesso richiede nuove professionalità in grado di muoversi, più o meno disinvoltamente, in questa terra di confine
Metamodeling and optimization of the THF process with pulsating pressure
No full textTube hydroforming is a process used in various applications to form the tube in a desired complex shape, by combining the use of internal pressure, which provides the required stress to yield the material, and axial feeding, which helps the material to flow towards the bulging zone. In many studies it has been demonstrated how wrinkling and bursting defects can be severely reduced by means of a pulsating pressure, and how the so-called hammering hydroforming enhances the formability of the material. The definition of the optimum pressure and axial feeding profiles represent a daunting challenge in the designing phase of the hydroforming operation of a new part. The quality of the formed part is highly dependent on the amplitude and the peak value of the pulsating pressure, along with the axial stroke. In this paper, a research is reported, conducted by means of explicit finite element simulations of a hammering THF operation and metamodeling techniques aimed at optimizing the process parameters for the production of a complex part. The improved formability is explored for different factors and an optimization strategy is used to determine the most convenient pressure and axial feed profile curves for the hammering THF process of the examined part. It is shown how the pulsating pressure allows the minimization of the energy input in the process, still respecting final quality requirements
Shallow-water sponge grounds along the Apulian coast (central Mediterranean Sea)
No full textSponge grounds are complex three-dimensional benthic habitats dominated by sponges. These sponge-dominated assemblages have been reported worldwide, from the intertidal zone to the deep sea. In shallow euphotic waters, dense sponge aggregations have been mainly found in tropical areas, and their presence is in some cases related to environmental degradation and coral decline. The Mediterranean Sea is globally recognised as a biodiversity hotspot, where light-exposed rocky reefs are typically dominated by photophilous algae. However, high local anthropogenic pressures, coupled with climate change, are leading to the reorganisation of benthic communities and the occurrence of regime shifts in several areas. Here we report the first description of unusual, shallow-water sponge grounds in Mediterranean light-exposed rocky reefs, in an area previously impacted by the destructive date-mussel fishery. These assemblages, found along the Apulian coast (central Mediterranean Sea), are now (2017) characterised by a mean coverage of sponges ranging between 3% and 33%, with maximum values up to 85%. Variation in the structure of assemblages and in the abundance of individual taxa between depths has been tested by multivariate and univariate techniques. The spatial characterisation has been complemented with the taxonomic analysis of the sponge assemblages, which resulted in the identification of 14 sponge taxa. These findings are compared with results of previous research in the same area and discussed with particular reference to the potential variables involved in sponge dominance and spatial distribution in the present system and elsewhere
Effect of structure of the electrical performance of gas diffusion electrodes for metal air batteries
No full textLo strano caso H.H.
No full textIl prodotto analizza il caso studio rappresentato dall'Hotel Hoiuse di Porto Recanati oggetto di una rilevante esperienza di ricerca inter-istituzionale condotta nell'ambito del progetto Challenge promosso dalla Prefettura di Macerata e finanziato dal F.A.M.I. 2014-20 per affrontare i problemi legati al radicale mutamento delle condizioni abitative indotte dal fenomeno migratorio
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