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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 Early bird, the core retrieval engine that powers Twitter's real-time search service. Although Early bird builds and maintains inverted indexes like nearly all modern retrieval engines, its(More)
The present study focused on the hypothesis that dietary supplementation with medium-chain TAG (MCT) will improve cognitive function in aged dogs by providing the brain with energy in the form of ketones. Aged Beagle dogs were subjected to a baseline battery of cognitive tests, which were used to establish cognitively equivalent control or treatment groups.(More)
Peer-to-peer systems such as Gnutella are resilient to failures at a single point in the network because of their decentralized nature. However an attack resulting in the removal of a small percentage of highly connected nodes could cripple such systems. We believe that distributed attack recovery is not simply a reactive process but requires proactive(More)
We investigate the structure of a function relevant to cryptography, given by f : x → x x mod p, for p a prime. We call f the self-power map. Given x, it is easy to calculate f (x) ≡ x x (mod p). However, it is thought to be difficult to quickly calculate f −1 (x x). That is, given x x ≡ c (mod p), for a fixed c, it is difficult to quickly solve for x. We(More)
algorithm, DES, was designed specifically for hardware im-Reconfigurable computing is gaining rising attention as an plementations 30 years ago. Most of the algorithms de-alternative to traditional processing for many applications. signed afterwards are very efficient in hardware as well. Data encryption and decryption is one of these applications, In(More)
This paper presents GraphJet, a new graph-based system for generating content recommendations at Twitter. As motivation , we trace the evolution of our formulation and approach to the graph recommendation problem, embodied in successive generations of systems. Two trends can be identified: supplementing batch with real-time processing and a broadening of(More)