Search results for: Mark Schmalz
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The reconstruction of nxn-pixel Synthetic Aperture Radar imagery using Back Projection algorithm incurs O(n2·m) cost, where m is the number of pulses. This paper presents dynamic data driven multiresolution algorithms to speed up SAR backprojection on multiple GPUs. A critical part of this spatially variant reconstruction process is load balancing, which circumvents asymmetric work assignment. Our...
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Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering > Networks for Grid Applications > General Session 2 > 37-44
Workflows generated from e-Science applications require the simultaneous use of multiple types of resources. In this paper, we present the Multiple Resource Reservation Model (MRRM), which enables the monitoring and scheduling of multiple heterogeneous and distributed resources. MRRM provides a unified representation for multiple types of distributed resources, and represents resource constrains such...
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This paper presents a modular, extensible, framework for rendering images from synthetic aperture radar (SAR) data on an array of heterogeneous processor architectures. Our design supports real-time reconstruction of a two-dimensional image from a matrix of echo pulses and their corresponding response values using Backprojection. Key to our design is the division of the Backprojection problem into...
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This paper presents a design for parallel processing of synthetic aperture radar (SAR) data using multiple Graphics Processing Units (GPUs). Our approach supports real-time reconstruction of a two-dimensional image from a matrix of echo pulses and their response values. Key to runtime efficiency is a partitioning scheme that divides the output image into tiles and the input matrix into a collection...
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This paper presents a design for parallel processing of synthetic aperture radar (SAR) data using one or more Graphics Processing Units (GPUs). Our design supports real-time reconstruction of a two-dimensional image from a matrix of echo pulses and their corresponding response values. Key to our design is a dual partitioning scheme that divides the output image into tiles and divides the input matrix...
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Development Genes and Evolution > 2005 > 215 > 6 > 313-319
Peltate leaf architecture has evolved from conventional bifacial leaves many times in flowering plant evolution. Characteristics of peltate leaves, such as the differentiation of a cross zone and of a radially symmetric, margin-less petiole, have also been observed in mutants of genes responsible for adaxial-abaxial polarity establishment. This suggests that altered regulation of such genes provided...
