— The web today is increasingly characterized by social and real-time signals, which we believe represent two frontiers in information retrieval. In this paper, we present Earlybird, the core retrieval engine that powers Twitter's real-time search service. Although Earlybird builds and maintains inverted indexes like nearly all modern retrieval engines, its… (More)
Various constrained frequent pattern mining problem formulations and associated algorithms have been developed that enable the user to specify various itemset-based constraints that better capture the underlying application requirements and characteristics. In this paper we introduce a new class of <i>block</i> constraints that determine the significance of… (More)
Several electroencephalographic (EEG) abnormalities have been observed during sleep in patients suffering from the fibromyalgia syndrome (FMS). In this study, 12 patients with fibromyalgia and 14 control subjects had two polysomnographic recordings obtained at home. Data from the second night were subjected to blinded manual scoring as well as signal… (More)
In this talk, we will discuss the data pipeline at Twitter that collects, aggregates and processes large volumes of data in real time and also how it fits in the broader data infrastructure ecosystem. We will also discuss challenges we have faced and lessons we have learned while building this infrastructure at Twitter.
ii Acknowledgements I am so thankful for the support I have had from my professors, family and friends. No Herculean task consummated without the support and contribution from a number of individuals. These few paragraphs are an effort to optimize my gratitude towards all those who helped me through out this experience and successful completion of the… (More)