Essays about: "Presto"

Found 5 essays containing the word Presto.

  1. 1. Hive, Spark, Presto for Interactive Queries on Big Data

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Nikita Gureev; [2018]
    Keywords : Hadoop; SQL; interactive analysis; Hive; Spark; Spark SQL; Presto; Big Data;

    Abstract : Traditional relational database systems can not be efficiently used to analyze data with large volume and different formats, i.e. big data. Apache Hadoop is one of the first open-source tools that provides a distributed data storage system and resource manager. READ MORE

  3. 2. Multitenant PrestoDB as a service

    University essay from KTH/Skolan för informations- och kommunikationsteknik (ICT)

    Author : Aruna Kumari Yedurupak; [2017]
    Keywords : Hadoop; Presto; SQL; Multi-tenancy; Hops; HopsWorks; Airpal; Proxy servlet; Hadoop; Presto; SQL; multi-hyresrätt; Hops; HopsWorks; Airpal; Proxy servlet;

    Abstract : In recent years, there has been tremendous growth in both the volumes of data that is produced, stored, and queried by organizations. Organizations spend more money to investigate and obtain useful information or knowledge against terabytes and even petabytes of data. READ MORE

  4. 3. In-Plane Motion Correction in Reconstruction of non-Cartesian 3D-functional MRI

    University essay from Datorseende; Tekniska högskolan

    Author : Anette Karlsson; [2011]
    Keywords : MRI; fMRI; PRESTO-CAN; Motion Correction; Radial Sampling Pattern; Fourier domain; Circular Correlation; Gridding Reconstruction;

    Abstract : When patients move during an MRI examination, severe artifacts arise in the reconstructed image and motion correction is therefore often desired. An in-plane motion correction algorithm suitable for PRESTO-CAN, a new 3D functional MRI method where sampling of k-space is radial in kx-direction and kz-direction and Cartesian in ky-direction, was implemented in this thesis work. READ MORE

  5. 4. Improved Temporal Resolution Using Parallel Imaging in Radial-Cartesian 3D functional MRI

    University essay from Datorseende

    Author : Gustav Ahlman; [2011]
    Keywords : fMRI; PRESTO-CAN; SENSE; parallel imaging; temporal resolution; radial-Cartesian sampling; normalized convolution;

    Abstract : MRI (Magnetic Resonance Imaging) is a medical imaging method that uses magnetic fields in order to retrieve images of the human body. This thesis revolves around a novel acquisition method of 3D fMRI (functional Magnetic Resonance Imaging) called PRESTO-CAN that uses a radial pattern in order to sample the (kx,kz)-plane of k-space (the frequency domain), and a Cartesian sample pattern in the ky-direction. READ MORE

  6. 5. Method for Acquisition and Reconstruction of non-Cartesian 3-D fMRI

    University essay from Bildbehandling; Tekniska högskolan

    Author : Per Thyr; [2008]
    Keywords : MRI; PRESTO; PRESTO CAN; rotation; sequence development; image reconstruction; gridding; phase correction;

    Abstract : The PRESTO sequence is a well-known 3-D fMRI imaging sequence. In this sequence the echo planar imaging technique is merged with the echo-shift technique. This combination results in a very fast image acquisition, which is required for fMRI examinations of neural activation in the human brain. READ MORE