4 papers
Modeling Temporal Evidence from External Collections
Flávio Martins, João Magalhães, Jamie Callan
Newsworthy events are broadcast through multiple mediums and prompt the crowds to produce comments on social media. In this paper, we propose to leverage on this behavioral dynamic…
Inferring User Gender from User Generated Visual Content on a Deep Semantic Space
David Semedo, João Magalhães, Flávio Martins
In this paper we address the task of gender classification on picture sharing social media networks such as Instagram and Flickr. We aim to infer the gender of an user given only a…
A Vertical PRF Architecture for Microblog Search
Flávio Martins, João Magalhães, Jamie Callan
In microblog retrieval, query expansion can be essential to obtain good search results due to the short size of queries and posts. Since information in microblogs is highly dynamic…
Barbara Made the News: Mining the Behavior of Crowds for Time-Aware Learning to Rank
Flávio Martins, João Magalhães, Jamie Callan
In Twitter, and other microblogging services, the generation of new content by the crowd is often biased towards immediacy: what is happening now. Prompted by the propagation of co…