Search results for " cloud"
showing 10 items of 294 documents
Relationship between resolution and accuracy of four intraoral scanners in complete-arch impressions
2018
Background The scanner does not measure the dental surface continually. Instead, it generates a point cloud, and these points are then joined to form the scanned object. This approximation will depend on the number of points generated (resolution), which can lead to low accuracy (trueness and precision) when fewer points are obtained. The purpose of this study is to determine the resolution of four intraoral digital imaging systems and to demonstrate the relationship between accuracy and resolution of the intraoral scanner in impressions of a complete dental arch. Material and methods A master cast of the complete maxillary arch was prepared with different dental preparations. Using four di…
Energy Efficient Resource Allocation for Wireless Power Transfer Enabled Collaborative Mobile Clouds
2016
In order to fully enjoy high rate broadband multimedia services, prolonging the battery lifetime of user equipment is critical for mobile users, especially for smartphone users. In this paper, the problem of distributing cellular data via a wireless power transfer enabled collaborative mobile cloud (WeCMC) in an energy efficient manner is investigated. WeCMC is formed by a group of users who have both functionalities of information decoding and energy harvesting, and are interested for cooperating in downloading content from the operators. Through device-to-device communications, the users inside WeCMC are able to cooperate during the downloading procedure and offload data from the base sta…
Context-aware vehicular cyber-physical systems with cloud support: architecture, challenges, and solutions
2014
[EN] The advances in wireless communication techniques, mobile cloud computing, and context-aware technologies boost a growing interest in the design, development, and deployment of vehicular networks for emerging applications. This leads to an increasing evolutionary tendency to change from vehicular networks toward cloud-assisted context-aware vehicular cyber-physical systems. In this article, we first propose a multi-layered context-aware architecture and introduce two crucial service components, vehicular social networks and context-aware vehicular security. Then we propose an application scenario regarding the context-aware dynamic parking services by illuminating the cloud-assisted ar…
Uno Smart Campus per UniPA
2017
L’accesso pervasivo alla rete ha avviato una profonda trasformazione del tessuto sociale e culturale, incidendo profondamente anche sui processi di erogazione dei servizi della Pubblica Amministrazione. L’Università degli Studi di Palermo si inserisce in tale contesto, avendo recentemente intrapreso un percorso di innovazione che mira ad espandere i confini della didattica, della divulgazione del sapere scientifico, della creazione di nuova scienza e cultura, al fine di creare uno Smart Campus pronto ad accogliere gli studenti ormai “nativi digitali”.
3D Reconstruction of rough terrain for USARSim using a height-map method
2008
In this paper, a process for a simplified reconstruction of rough terrains from point clouds acquired using laser scanners is presented. The main idea of this work is to build height-maps which are level gray-scale images representing the ground elevation. These height-maps are generated from step-fields which can be represented by a set of side-by-side pillars. Although height-maps are a practical means for rough terrain reconstruction, it is not possible to represent two different elevations for a given location with one height-map. This is an important drawback as terrain point clouds can show different zones representing surfaces above other surfaces.In this paper, a methodology to crea…
Detection and Isolation of Switches in Point Clouds of the German Railway Network
2015
In order to obtain an automated system of railway management, it is necessary to automatically detect, isolate and identify all switches in a point cloud which represents the railway. To realize this automated system of detection, a set of pre-processing steps is applied. The system begins by detecting and isolating tracks through application of a mask on each section of the point cloud. Then, it does a denoising through mathematical morphology and a compression in replacing a group of points by their centroid. Finally, it closes tracks holes through extrapolation. After that, the system does a low-level processing to search for all intersections between tracks, and records information on t…
Internet of Things. Preliminary Issues for MCCRC Research
2015
The presentation provides a definition of "thing" in an IoT context, clarifies the relations among the Internet of Things and cloud computing, points out who are the actors in such an environment and set the basis for an interdisciplinary research that will focus on e-Health
Internet of Things Law. Of Privacy, Data Protection and Some Other Stuff
2014
The presentation at hand deals with the privacy, data protection and security aspects of the Internet of Things
Cloud Computing e protezione dei dati nel web 3.0
2014
Il cloud computing è un ritrovato deputato all'archiviazione, elaborazione e uso di dati su computer remoti, grazie al quale gli utenti hanno a disposizione una potenza di elaborazione quasi illimitata, non sono tenuti ad investire grandi capitali per soddisfare le proprie esigenze e possono accedere ai loro dati ovunque sia disponibile una connessione Internet. Il presente scritto si propone di contribuire ad una migliore comprensione della nuova tecnologia e alla ricostruzione dell'attuale (invero scarno) quadro giuridico, ciò che può aiutare a superare i principali problemi posti dalla nuvola al diritto dei privati e riconducibili, primariamente, alla protezione dei dati, al diritto dei …
Il cloud computing. Alla ricerca del diritto perduto nel web 3.0
2014
Il presente saggio intende mettere a fuoco il fenomeno del cloud computing, tentando di setacciare i frammenti normativi dispersi in un fiume di norme difficilmente componibili a sistema, al fine di ricostruire il quadro giuridico vigente in materia. La certezza e la conoscibilità del diritto sono esigenze che si fanno viepiù pressanti in un terreno, come quello in esame, ancora tutto da dissodare e l’ignoranza del quale può a ragione far temere, con la prozia Léonie nella Recherche, che « la journée ne se passera pas sans pluie ». Ed è alla luce dell’attuale incertezza che si spiega il singolare fenomeno per cui, secondo una ricerca del 2014, gran parte delle imprese italiane hanno familia…