The single-scatter approximation is fundamental in many tomographic imaging problems including x-ray scatter and optical for certain media. In all cases, noisy measurements are affected by both local events nonlocal attenuation. Prior works focus on reconstructing one of two images: density or total However, images media specific useful object identification. Nonlocal effects the attenuation im...

Abstract A scattering plate consisting of multiple lead strips is an effective tool for scatter correction and dose reduction in cone-beam CT(CBCT). Existing methods take advantage data redundancy by partially blocking cone beam from a single scan to make up perform correction. However, geometric objects with large angles during CBCT scans, existing backprojection-filteration(BPF) algorithms ca...

Scatter correction is very important in 3-D PET reconstruction due to a large scatter contribution in measurements. Currently, one of the most popular methods is the so-called single scatter simulation (SSS), which considers single Compton scattering contributions from many randomly distributed scatter points. The SSS enables a fast calculation of scattering with a relatively high accuracy; how...

The operational measure (OM) of the Second-Generation Intact Stability Criteria (SGISC) is initial step toward design a performance-based dynamic stability assessment ship by considering vessel’s operation, loading condition and weather parameters. SGISC recommends standard wave scatter table (WST) for environmental data, an indefinite requirement simplified pathway, which provides probability ...

Sparse matrix vector multiplication (SpMxV) is often one of the core components of many scientific applications. Many authors have proposed methods for its data distribution in distributed memory multiprocessors. We can classify these into four groups: Scatter, D-Way Strip, Recursive and Miscellaneous. In this work we propose a new method (Multiple Recursive Decomposition (MRD)), which partitio...

Sparse matrix vector multiplication (SpMxV) is often one of the core components of many scientific applications. Many authors have proposed methods for its data distribution in distributed memory multiprocessors. We can classify these into four groups: Scatter, D-Way Strip, Recursive and Miscellaneous. In this work we propose a new method (Multiple Recursive Decomposition (MRD)), which partitio...

We use a sample of 115 galaxy clusters at 0.1 < z < 1.3 observed with Chandra ACIS-I to investigate the relation between luminosity and YX (the product of gas mass and temperature). The scatter in the relation is dominated by cluster cores, and a tight LX −YX relation (11% intrinsic scatter in LX) is recovered if sufficiently large core regions (0.15R500) are excluded. The intrinsic scatter is ...

Visualizing data on tablets is challenging due to the relatively small screen size and limited user interaction capabilities. Standard data visualization apps provide support for pinch-and-zoom and scrolling operations, but do not provide context for data that is off-screen. When exploring data on tablets, the user must be able to focus on a region of interest and quickly find interesting patte...