With peta-bytes of data that are continuously collected about various aspects of the Internet, how hard can it be to obtain an accurate picture of its traffic, its physical topology (i.e., router-level Internet), its logical overlays (e.g., the Web, online social networks), or its “dark” sides and associated activities (i.e. cyber crimes)?
Seguir leyendo arrow_right_altSocial scientist have traditionally had limited access to data about individuals, like their personality, relationships or tastes. The widespread use of Online Social Networks (OSNs) has changed this drastically, since OSNs provide huge amounts of data to work with.
Seguir leyendo arrow_right_altThe Internet depends on economic relationships between ASes (Autonomous Systems), which come in different shapes and sizes - transit, content, and access networks. CDNs (Content delivery networks) are also a pivotal part of the Internet ecosystem and construct their overlays for faster content delivery.
Seguir leyendo arrow_right_altThe talk will present concepts and basics of distributed computing which are important (at least from the presenter's point of view!), and should be known and mastered by researchers, and Master students. Those include: (a) a characterization of distributed computing (which is too much often confused with parallel computing); (b) the notion of a synchronous system and its associated notions of a local algorithm and message adversaries; (c) the notion of an asynchronous shared memory system and its associated notions of universality and progress conditions; and (d) the notion of an asynchronous message-passing system with its associated broadcast and agreement abstractions, its impossibility results, and approaches to circumvent them. Hence, the talk can be seen as a guided tour to key elements that constitute basics of distributed computing.
Seguir leyendo arrow_right_altUnderstanding complex physical systems requires knowledge of the interactions among their constituents, in order to be able to predict emergent behaviors (i.e., of the system as a whole).
Seguir leyendo arrow_right_altThe main themes of the talk are the optimization of mobile crowd-sensing and recommender system platforms from the point of view of the system designer. In the first part of the talk, we first discuss optimization of mobile crowd-sensing campaigns in terms of total expected quality for a set of tasks to be accomplished, and in terms of compensation cost to task contributors.
Seguir leyendo arrow_right_altTo compete in sectors where the customer experience is increasingly digitized, companies are scrambling to expand their portfolio of innovations – from new products and enhanced processes to complementary services and new business models. In the process IT units are figuring out how to share responsibilities with, and coordinate the efforts of, internal stakeholder groups, such as marketing, operations and R&D, as well as the efforts of external parties, such as vendors, business partners, start-ups, and even individual contractors and hobbyists. This seminar will be an opportunity to learn about and discuss the most recent research insights from an MIT CISR research project on digital innovation.
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Today's heterogeneous networks comprised of mostly macro cells and indoor small cells will not be able to meet the upcoming traffic demands. Indeed, it is forecasted that at least a 100x network capacity increase will be required to meet the traffic demands in 2020.
Seguir leyendo arrow_right_altVisible light communications are becoming a major short range wireless communication technology. Incorporating communication into existing lighting infrastructure, VLCs are potential candidate for future indoor communications.
Seguir leyendo arrow_right_altThe standard interference functions introduced by Yates have been very influential on the analysis and design of distributed power control laws. While powerful and versatile, the framework has some drawbacks: the existence of fixed-points has to be established separately, and no guarantees are given on the rate of convergence of the iterates.
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