Libreria per comunicazioni ad-hoc per android basate su bluetooth

La tesi sviluppa, attraverso un processo definito e gestito, una libreria Android che permette di far comunicare diversi dispositivi mobili tramite Bluetooth. Inoltre gestisce: • le richieste di connessione sia che esse provengano dall’esterno, sia che partano dal dispositivo stesso; • la dinamicità del sistema utilizzando dispositivi mobili, cioè capaci di muoversi in diverse direzioni costantemente. In tal senso, la lista dei dispositivi vicini è costantemente aggiornata. • la comunicazione in stile Peer-to-Peer(P2P). In questo caso si viene a formare un gap in quanto la libreria Android di Bluetooth usa lo stile Master-Slave per i suoi dispositivi. Per colmare questo gap, la libreria sviluppata crea un layer soprastante la libreria Bluetooth di Android e maschera lo stile di comunicazione di quest’ultima a favo- re di una comunicazione paritaria, nella quale un dispositivo può sia accettare le richieste di connessione, sia connettersi ad altri dispositivi.

Design and implementation of an anonymous peer-to-peer iaas cloud

Cloud services are becoming ever more important for everyone's life. Cloud storage? Web mails? Yes, we don't need to be working in big IT companies to be surrounded by cloud services. Another thing that's growing in importance, or at least that should be considered ever more important, is the concept of privacy. The more we rely on services of which we know close to nothing about, the more we should be worried about our privacy. In this work, I will analyze a prototype software based on a peer to peer architecture for the offering of cloud services, to see if it's possible to make it completely anonymous, meaning that not only the users using it will be anonymous, but also the Peers composing it will not know the real identity of each others. To make it possible, I will make use of anonymizing networks like Tor. I will start by studying the state of art of Cloud Computing, by looking at some real example, followed by analyzing the architecture of the prototype, trying to expose the differences between its distributed nature and the somehow centralized solutions offered by the famous vendors. After that, I will get as deep as possible into the working principle of the anonymizing networks, because they are not something that can just be 'applied' mindlessly. Some de-anonymizing techniques are very subtle so things must be studied carefully. I will then implement the required changes, and test the new anonymized prototype to see how its performances differ from those of the standard one. The prototype will be run on many machines, orchestrated by a tester script that will automatically start, stop and do all the required API calls. As to where to find all these machines, I will make use of Amazon EC2 cloud services and their on-demand instances.

Scalable and Seamless Discovery and Selection of Services in Mobile Cloud Computing

Mobile devices are now capable of supporting a wide range of applications, many of which demand an ever increasing computational power. To this end, mobile cloud computing (MCC) has been proposed to address the limited computation power, memory, storage, and energy of such devices. An important challenge in MCC is to guarantee seamless discovery of services. To this end, this thesis proposes an architecture that provides user-transparent and low-latency service discovery, as well as automated service selection. Experimental results on a real cloud computing testbed demonstrated that the proposed work outperforms state of-the-art approaches by achieving extremely low discovery delay.

Sviluppo di sistemi mobile ad alta densita basati su comunicazioni opportunistiche wireless

In questa tesi ci si pone l'obiettivo di sviluppare sistemi distribuiti composti da device mobile che si scambiano informazioni tramite comunicazioni opportunistiche wireless peer-to-peer. Vengono inizialmente analizzate le principali tecnologie di comunicazione wireless adatte allo scopo, soffermandosi sulle reti Wifi ad hoc, delle quali vengono studiate le performance in sistemi di larga scala tramite il simulatore di reti ns-3. Successivamente viene esposto lo sviluppo di componenti software, basati su Akka Stream, per la costruzione di campi computazionali tramite comunicazioni opportunistiche tra device Android, effettuate tramite reti Wifi ad hoc.

Mythologizing Greed and Betrayal in the Strait of Magellan in Juan de Miramontes' Armas Antarticas

Taking as a starting point Antonio Sanchez Jimenez's recent work on the myth of Jason in Lope de Vega's El Vellocino de Oro, this article examines the myths of Jason and Leander in Juan de Miramontes Zuazola's epic, Armas antarticas (1608-1609). After exploring the explicit allusions to the myths in the epic, I analyse an implicit reference to Leander in the portrayal of Tome Hernandez, the only survivor of the failed sixteenth-century Spanish settlements in the Strait of Magellan. As it turns out, Hernandez was rescued by the English pirate, Thomas Cavendish. In evoking the myth of Leander on the southern coast of Chile, Armas antarticas recalls Alonso de Ercilla's self-description in La Araucana (1569, 78, 89) as analysed by Ricardo Padron. However, I contend that the representation of Hernandez is best understood in comparison to Juan Boscan's Leandro (1543), the fullest and most widely disseminated Spanish version of the tale in the sixteenth century. Appealing to the Leander myth allows Armas antarticas to turn away from a focus on the role of greed in colonization. Yet shadows of Jason still lurk behind the portrayal of Hernandez, which raise other serious ethical questions for the Spanish Empire concerning piracy and loyalty as these play out in the Strait of Magellan. This essay shows that the poetic portrayal of Hernandez and Cavendish ends up exhibiting the same ambiguities associated with piracy as analysed by Daniel Heller-Roazen.

Evaluation of the Role of Access Providers Discussion of Dutch Pirate Bay Case Law and Introducing Principles on Directness, Effectiveness, Costs, Relevance, and Time

Internet service providers (ISPs) play a pivotal role in contemporary society because they provide access to the Internet. The primary task of ISPs – to blindly transfer information across the network – has recently come under pressure, as has their status as neutral third parties. Both the public and the private sector have started to require ISPs to interfere with the content placed and transferred on the Internet as well as access to it for a variety of purposes, including the fight against cybercrime, digital piracy, child pornography, etc. This expanding list necessitates a critical assessment of the role of ISPs. This paper analyses the role of the access provider. Particular attention is paid to Dutch case law, in which access providers were forced to block The Pirate Bay. After analysing the position of ISPs, we will define principles that can guide the decisions of ISPs whether to take action after a request to block access based on directness, effectiveness, costs, relevance and time.

Enforcing Copyright Infringements Online: In Search of Balanced Private International Law Rules

Enforcement of copyright online and fighting online “piracy” is a high priority on the EU agenda. Private international law questions have recently become some of the most challenging issues in this area. Internet service providers are still uncertain how the Brussels I Regulation (Recast) provisions would apply in EU-wide copyright infringement cases and in which country they can be sued for copyright violations. Meanwhile, because of the territorial approach that still underlies EU copyright law, right holders are unable to acquire EU-wide relief for copyright infringements online. This article first discusses the recent CJEU rulings in the Pinckney and Hejduk cases and argues that the “access approach” that the Court adopted for solving jurisdiction questions could be quite reasonable if it is applied with additional legal measures at the level of substantive law, such as the targeting doctrine. Secondly, the article explores the alternatives to the currently established lex loci protectionis rule that would enable right holders to get EU-wide remedies under a single applicable law. In particular, the analysis focuses on the special applicable law rule for ubiquitous copyright infringements, as suggested by the CLIP Group, and other international proposals.

Comparative Study of Digital Rights Management Systems for Music and Text Files

Digital Rights Management Systems (DRMS) are seen by content providers as the appropriate tool to, on the one hand, fight piracy and, on the other hand, monetize their assets. Although these systems claim to be very powerful and include multiple protection technologies, there is a lack of understanding about how such systems are currently being implemented and used by content providers. The aim of this paper is twofold. First, it provides a theoretical basis through which we present shortly the seven core protection technologies of a DRMS. Second, this paper provides empirical evidence that the seven protection technologies outlined in the first section of this paper are the most commonly used technologies. It further evaluates to what extent these technologies are being used within the music and print industry. It concludes that the three main Technologies are encryption, password, and payment systems. However, there are some industry differences: the number of protection technologies used, the requirements for a DRMS, the required investment, or the perceived success of DRMS in fighting piracy.

The Application of Digital Rights Management Systems in the Music Industry - An Empirical Investigation

Technology advances in hardware, software and IP-networks such as the Internet or peer-to-peer file sharing systems are threatening the music business. The result has been an increasing amount of illegal copies available on-line as well as off-line. With the emergence of digital rights management systems (DRMS), the music industry seems to have found the appropriate tool to simultaneously fight piracy and to monetize their assets. Although these systems are very powerful and include multiple technologies to prevent piracy, it is as of yet unknown to what extent such systems are currently being used by content providers. We provide empirical analyses, results, and conclusions related to digital rights management systems and the protection of digital content in the music industry. It shows that most content providers are protecting their digital content through a variety of technologies such as passwords or encryption. However, each protection technology has its own specific goal, and not all prevent piracy. The majority of the respondents are satisfied with their current protection but want to reinforce it for the future, due to fear of increasing piracy. Surprisingly, although encryption is seen as the core DRM technology, only few companies are currently using it. Finally, half of the respondents do not believe in the success of DRMS and their ability to reduce piracy.

As redes sociotécnicas da comunidade gamer : Habilidades cognitivas, capitalismo cognitivo e pirataria no orkut

In the perspective of the so called 'cognitive capitalism', this paper intends to analyze the sharing and customization strategies developed in Brazilian online game communities. Under Bruno Latour's Actor-Network Theory (ANT), this work describes these socio-technical networks electing the human and non human relevant actants for their role on what could also be depicted as an distributed cognitive process (HUTCHINS, 2000). This alternative way of participative consumption deals with the social and creative production of tutorials; in-game and out-game editing and all sorts of gathering, organization and distribution of virtual data. The communities studied are related to the game Pro Evolution Soccer (PES) in their multiple platforms

As redes sociotécnicas da comunidade gamer : Habilidades cognitivas, capitalismo cognitivo e pirataria no orkut

In the perspective of the so called 'cognitive capitalism', this paper intends to analyze the sharing and customization strategies developed in Brazilian online game communities. Under Bruno Latour's Actor-Network Theory (ANT), this work describes these socio-technical networks electing the human and non human relevant actants for their role on what could also be depicted as an distributed cognitive process (HUTCHINS, 2000). This alternative way of participative consumption deals with the social and creative production of tutorials; in-game and out-game editing and all sorts of gathering, organization and distribution of virtual data. The communities studied are related to the game Pro Evolution Soccer (PES) in their multiple platforms

As redes sociotécnicas da comunidade gamer : Habilidades cognitivas, capitalismo cognitivo e pirataria no orkut

In the perspective of the so called 'cognitive capitalism', this paper intends to analyze the sharing and customization strategies developed in Brazilian online game communities. Under Bruno Latour's Actor-Network Theory (ANT), this work describes these socio-technical networks electing the human and non human relevant actants for their role on what could also be depicted as an distributed cognitive process (HUTCHINS, 2000). This alternative way of participative consumption deals with the social and creative production of tutorials; in-game and out-game editing and all sorts of gathering, organization and distribution of virtual data. The communities studied are related to the game Pro Evolution Soccer (PES) in their multiple platforms

Multi-agent Architecture for Heterogeneous Reasoning under Uncertainty Combining MSBN and Ontologies in Distributed Network Diagnosis

This article proposes a MAS architecture for network diagnosis under uncertainty. Network diagnosis is divided into two inference processes: hypothesis generation and hypothesis confirmation. The first process is distributed among several agents based on a MSBN, while the second one is carried out by agents using semantic reasoning. A diagnosis ontology has been defined in order to combine both inference processes. To drive the deliberation process, dynamic data about the influence of observations are taken during diagnosis process. In order to achieve quick and reliable diagnoses, this influence is used to choose the best action to perform. This approach has been evaluated in a P2P video streaming scenario. Computational and time improvements are highlight as conclusions.

A multi-agent system with distributed bayesian reasoning for network fault diagnosis

In this paper, an innovative approach to perform distributed Bayesian inference using a multi-agent architecture is presented. The final goal is dealing with uncertainty in network diagnosis, but the solution can be of applied in other fields. The validation testbed has been a P2P streaming video service. An assessment of the work is presented, in order to show its advantages when it is compared with traditional manual processes and other previous systems.