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BACKGROUND Data generated from liquid chromatography coupled to high-resolution mass spectrometry (LC-MS)-based studies of a biological sample can contain large amounts of biologically significant information in the form of proteins, peptides, and metabolites. Interpreting this data involves inferring the masses and abundances of biomolecules injected into(More)
F1 is a distributed relational database system built at Google to support the AdWords business. F1 is a hybrid database that combines high availability, the scalability of NoSQL systems like Bigtable, and the consistency and us-ability of traditional SQL databases. F1 is built on Spanner , which provides synchronous cross-datacenter replica-tion and strong(More)
Many of the services that are critical to Google's ad business have historically been backed by MySQL. We have recently migrated several of these services to F1, a new RDBMS developed at Google. F1 implements rich relational database features, including a strictly enforced schema, a powerful parallel SQL query engine, general transactions, change tracking(More)
Recent image compression schemes have focused primarily on wavelet transforms, culminating in the JPEG-2000 standard. Block based DCT compression, on which the older JPEG standard is based, has been largely neglected because wavelet based coding methods appear to offer better image quality. This paper presents a simple compression algorithm that uses(More)
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