On Wednesday June 29th, in the context of the NOTRE, we will have several events to which you are cordially invited:
Luis F. Nuñez Chiroque, IMDEA Networks Institute
Training Course: “Detection, Prediction & Monitoring on Online Social Networks: leaders, trends and outliers”
Social 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. Now, researchers can be helped by the digital content generated by billion of users to better understand their online behaviour.
In this talk, we will discuss recent research on OSNs covering a wide range of topics. On the one hand, at low level (user scale), techniques for detection and prediction of leaders as well as detection of outliers are presented. On the other hand, at high level (network scale), techniques for detection and prediction of trends and events are shown. Also, regarding energy-efficient computation, new techniques for adaptive monitoring on networks are introduced. In addition, some of the tools used to analyse such OSNs will be described along the talk. Data from the major OSNs, such as Facebook, Twitter, Google+ and Tumblr, has been used in our studies.
Fragkiskos Papadopoulos, Department of Electrical Engineering, Computer Engineering and Informatics, Cyprus University of Technology
Seminar: Network Geometry: Theory and Applications
The lack of predictive power over complex systems either designed by humans or evolved by nature, is a foundational problem in contemporary science. Real networks such as the Internet, the Web, social and biological networks, have acquired emergent large-scale properties that are beyond our full understanding, much less prediction or control. Astonishingly, these emergent properties are the same across networks from drastically different domains, and are the ones required to facilitate the optimality of some important network functions, such as information transport.
In the past several years we have been developing a powerful and unique geometric theory explaining the ubiquitous common structure of complex networks, and its relation to the optimality of information transport. In this theory, network nodes are mapped to points in hyperbolic spaces, which lie hidden beneath the observable topologies. These spaces are called “hidden”, as they play the role of an underlying coordinate system, not readily observable by examining the network topology. Nodes closer in the underlying space are connected in the observable network topology with higher probability.
In this talk, we will first review this geometric network theory, and then discuss statistical inference methods for inferring the hyperbolic geometry of real networks. We will discuss applications of our results in the following contexts: (i) in routing/navigation in the Internet and other complex networks; (ii) in predicting missing or future links in real networks; and (iii) in network community detection. We will further give an overview of our latest research results on the geometric organization of real multilayer/multiplex systems. We will conclude the talk with open problems and future research directions.
Location for these two events: IMDEA Networks, rooms 1.1/1.2 (http://www.networks.imdea.org/contact/directions-to-imdea-networks)
This is a Branded event organized for NOTRE project (http://notre.socialcomputing.eu/) in collaboration with DataBeers (http://databeers.tumblr.com/). Following the DataBeers format, the event will feature six presentations focused on data usage in a social context and/or social sciences. The speakers and their talks are as follows:
• Enhancing security and privacy in the social web: a user-centered approach for the protection of minors, Michael Sirivianos, Social Computing Research Centre, Cyprus
• Mapping communities and ideas from text documents, Victoriano Izquierdo, Graphext, Spain
• Tomorrow, Now! ICS-FORTH AmI Programme, Iosif Klironomos, ICS-FORTH, Greece
• OpenTravelData: airports, aircrafts and much more data openly available, Israel Herraiz, Travel Intelligence, Amadeus IT Group
• Recommender System Techniques in Voting Advice Applications, Nicos Tsapatsoulis, Social Computing Research Centre, Cyprus
• Engaging online and in-venue audience during sports event, Pablo Acuña, Guud.tv, Spain
This event will be held at Campus Madrid (Auditorium) – 2 Calle Moreno Nieto, 28005 Madrid (https://www.google.com/maps/place/Campus+Madridfirstname.lastname@example.org,-3.7204465,17z/data=!3m1!4b1!4m5!3m4!1s0xd422875fe8d546d:0xfc628be71587461f!8m2!3d40.4124188!4d-3.7182578)