Twitter related problems:
Relation Extraction (Wang 2011)
Classification (Jain 2014)
Event Tracking (Pohl 2013)
Geo search and visualization (Gao 2013)
Trend Mining (Desmier 2013)
Rezidual Analysis of Attributed Graphs (Miller 2013)
Detection Theory (Miller 2013)
Spectral analysis of graphs
Tensors (Miller 2013)
Problems addresed in the framework of DSP on graphs:
Mathematical model of Twitter as a dynamic attributed graph with streams attached to vertexes.
Twitter diffusion of topics or hash terms.
Quering a corpus of dependencies parses of sentences viewed as graphs. (Miller 2012)
Integrated search of documents, multimedia archives and geographic data.
Detection Theory on twitter graphs.
Event Detection. (Dong 2014)
Early Warning System
Big Data Implementation.
Big Data Application Layer for Graphs: