Sachin Kulkarni

Learn More
We introduce a simple data model and API tailored for serving the social graph, and TAO, an implementation of this model. TAO is a geographically distributed data store that provides efficient and timely access to the social graph for Facebook’s demanding workload using a fixed set of queries. It is deployed at Facebook, replacing memcache for many data(More)
Over 800 million people around the world share their social interactions with friends on Facebook, providing a rich body of information referred to as the social graph. In this talk, I describe how we model and serve this graph. Our model uses typed nodes (fbobjects) and edges (associations) to express the relationships and actions that happen on Facebook.(More)
This paper presents a model for describing inter-organizational collaborations for e-commerce, e-government and e-business applications. The model, referred to as a community model, takes into account internal organizational rules and business policies as typically stated in business contracts that govern cross-collaborations. The model can support the(More)
BACKGROUND AND OBJECTIVES Prior studies suggest a possible association between the use of neuraxial-general anesthesia and a decrease in prostate cancer recurrence after radical prostatectomy. We examine the correlation of a spinal anesthesia-only technique on prostate cancer recurrence. METHODS Charts from consecutive radical prostatectomy patients of 3(More)
Nipah virus (NiV) is predicted to encode four proteins from its P gene (P, V, W, and C) via mRNA editing and an alternate open reading frame. By use of specific antibodies, the expression of the V, W, and C proteins in NiV-infected cells has now been confirmed. Analysis of the P-gene transcripts shows a ratio of P:V:W mRNA of 1:1:1, but this differs over(More)
BACKGROUND The specific aim of this study is to evaluate the cost-effectiveness of intensity-modulated radiation therapy (IMRT) compared with three-dimensional conformal radiation therapy (3D-CRT) in the treatment of a 70-year-old with intermediate-risk prostate cancer. METHODS A Markov model was designed with the following states; posttreatment, hormone(More)
In this paper we describe an approach to the modelling of virtual enterprise agreements. An important and ever-present issue in the set-up phase of such a virtual enterprise is the virtual enterprise contract. As one of the goals of virtual enterprises is to become operational quickly, the time consumed by the set-up phase must be reduced to a minimum. At(More)
Wormhole is a publish-subscribe (pub-sub) system developed for use within Facebook’s geographically replicated datacenters. It is used to reliably replicate changes among several Facebook services including TAO, Graph Search and Memcache. This paper describes the design and implementation of Wormhole as well as the operational challenges of scaling the(More)