Engineering topics
Publications and source records attributed to Cwik, T..
The Jet Propulsion Laboratory (JPL) is currently designing and building a number of instruments that operate in the microwave and millimeter-wave bands.
The design and implementation of Pyramid (http://www-hpc.jpl.nasa.gov/APPS/AMR/), a software library for performing parallel adaptive mesh refinement (PAMR) on unstructured meshes, is described.
The design and development of a software tool for performing parallel adaptive mesh refinement in unstructured computations on multiprocessor systems are described.
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Postprocessing of point-wise data is a fundamental process in many fields of research. Numerical differentiation is a key operation in computational electromagnetics.
This paper discusses the use of Boewulf-class computers in solving computational electromagnetic problems. Boewulf-class computers are defined as piles of PCs running LINUX, using fully mass-market, commercial, off-the-shelf (M2COTS) components.
This paper uses the parallel calculation of the radiation integral for examination of performance and compiler issues on a Beowulf-class computer. This type of computer, built from mass-market, commodity, off-the-shelf components, has limited communications performance and therefore also has a limited regime of codes for which it is suitable.
This paper uses two electromagnetic simulations to examine some performance and compiler issues on a Beowulf-Class computer.
We will discuss the application to astronomical instrumentation, theory of operation, the manufactureing technique, and its current limitations and possible means of improvement.
In this paper a method for simulating electromagnetic fields scattered from complex objects is reviewed; namely, an unstructured finite element code that does not use traditional mesh partitioning algorithms.
A typical Beowulf system, such as the machine at the Jet Propulsion Laboratory (JPL), may comprise 16 nodes interconnected by 100 base T Fast Ethernet. Each node may include a single Inter Pentium Pro 200 MHz microprocessor, 128 MBytes of DRAM, 2.5 GBytes of IDE disk, and PCI bus backplane, and an assortment of other devices.
This paper discusses Beowulf systems, focusing on Hyglac, the Beowulf system installed at the Jet Propulsion Laboratory. The purpose of the paper is to assess how a system of this type will perform while running a variety of scientific and engineering analysis and design software.
We are concerned with the design of inhomogeneous, all dielectric (lossless) periodic structures which act as filters.
The feasibility of novel all-dielectric waveguide grating filters is demonstrated, using a genetic algorithm to solve for material dielectric constants and geometric boundaries separating homogeneous regions of the periodic cell.
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The application of advanced computer architecture and software to a broad range of electromagnetic problems had allowed more accurate simulations of electrically larger and more complex components and systems...This paper overviews solutions to Maxwell's equations implicitly defined through systems of linear equations.
A coupled finite element-integral equation was developed to model fields scattered from inhomogenous, three-dimensional objects of arbitrary shape. This paper outlines how to implement the software on a scalable parallel processor.
(See abstract).