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Computing in Science & Engineering

Issue 5 • Date Sept.-Oct. 2002

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Displaying Results 1 - 14 of 14
  • Climate modeling

    Publication Year: 2002, Page(s):24 - 25
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    Freely Available from IEEE
  • Multi-scale geophysical modeling using the spectral element method

    Publication Year: 2002, Page(s):42 - 48
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1206 KB) | HTML iconHTML

    The spectral element method offers distinct advantages for geophysical simulations, including geometric flexibility, accuracy and scalability. Developers of atmospheric and oceanic models are capitalizing on these properties to create new models that can accurately and effectively simulate multi-scale flows in complex geometries. View full abstract»

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  • Treading new ground [tire industry]

    Publication Year: 2002, Page(s):12 - 13
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (837 KB)

    A common interest in nonlinear dynamics and computational mechanics, together with forward-looking, supportive management, has brought engineers and scientists from Sandia National Laboratory in Albuquerque, New Mexico, together with their Goodyear counterparts to collaborate on several projects destined to improve the way tires are built and tested. View full abstract»

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  • Web delivery of interactive laboratories: comparing three authoring tools

    Publication Year: 2002, Page(s):74 - 78
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1722 KB) | HTML iconHTML

    As educators know, the more a student interacts with a subject, the better he or she will learn it. This is particularly true in technical subjects. One way to promote interaction is to have "laboratories" in which the student manipulates objects on the computer screen using the keyboard or mouse and then sees those actions' outcome. View full abstract»

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  • Modeling chemical constituents of the atmosphere

    Publication Year: 2002, Page(s):56 - 63
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1738 KB) | HTML iconHTML

    Interactions between the atmosphere, ocean, ice, land surface, and the marine and terrestrial biosphere control the global climate system. These components are coupled by the exchange of momentum, radiative energy, and trace constituents' mass. Various processes drive this exchange and require different computational methods to model it. View full abstract»

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  • Climate modeling with spherical geodesic grids

    Publication Year: 2002, Page(s):32 - 41
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3262 KB) | HTML iconHTML

    A new approach to climate simulation uses geodesic grids generated from an icosahedron and could become on attractive alternative to current models. We implemented an atmospheric general circulation model using a geodesic discretization of the sphere. Our model uses the message-passing interface and runs efficiently on massively parallel machines. View full abstract»

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  • Designing scientific components

    Publication Year: 2002, Page(s):84 - 90
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (375 KB) | HTML iconHTML

    Correctness is more precious to scientific programmers than it is to business programmers because of the great difficulty in distinguishing between programming errors, errors in modeling, and errors in algorithms. We've all sat in meetings and discussed whether a peculiar wiggle in a graph represents an algorithm problem (such as neglecting to include a possibly negligible term) or a modeling one ... View full abstract»

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  • Applying local discretization methods in the NASA finite-volume general circulation model

    Publication Year: 2002, Page(s):49 - 54
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB) | HTML iconHTML

    The general circulation model, developed at the NASA Goddard Space Flight Center for climate simulations and other meteorological applications, emphasizes the conservative and monotonic transport and achieves sufficient accuracy for the global consistency of climate processes. View full abstract»

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  • Infrastructure simulation effort has high hopes, faces high hurdles

    Publication Year: 2002, Page(s):4 - 7
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (249 KB)

    The continuing availability of vital resources is paramount in ensuring the US national economy's well being. Yet until recently, no attempt was made to form an overreaching computational architecture capable of helping policymakers identify and protect those resources on a national level. The National Infrastructure Simulation and Analysis Center (NISAC), operated by a core partnership at Sandia ... View full abstract»

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  • Intensity-modulated radiation therapy

    Publication Year: 2002, Page(s):8 - 9
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1223 KB)

    Radiation therapy is a tricky business. The goal is to deliver as much radiation as possible to a tumor while sparing nearby noncancerous tissue. A newer approach, called intensity-modulated radiation therapy (IMRT), relaxes the requirement for a uniform dose distribution, yet delivers the radiation more accurately to the cancerous region. This dose distribution, created by small beamlets that can... View full abstract»

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  • Message passing: from parallel computing to the grid

    Publication Year: 2002, Page(s):70 - 73
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (474 KB) | HTML iconHTML

    Over the past decades, the computational science community has debated the best architecture for parallel computing. However, experience has found there is an almost irreconcilable difference between the way users would like to write their software and the way machines must be instructed to run efficiently. The use of message passing in parallel computing is a reasonable decision, because the resu... View full abstract»

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  • The right angle: precise numerical orthogonality in eigenstates

    Publication Year: 2002, Page(s):91 - 97
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (346 KB) | HTML iconHTML

    Solutions of the Schrodinger equation that pertain to different energies are orthogonal by virtue of quantum dynamics. However, when we obtain such solutions numerically using library differential equation solvers, and when the inner product is defined by numerical quadrature, the result is not sufficiently orthogonal for certain purposes. This paper shows how to construct stable finite-difference... View full abstract»

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  • Parallel implementation issues: global versus local methods

    Publication Year: 2002, Page(s):26 - 31
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (559 KB) | HTML iconHTML

    Spectral elements are a potential alternative to the spectral transform method widely used in atmospheric general circulation models. A semi-implicit formulation permits larger time steps than an explicit formulation. Thus, a semi-implicit 3D spectral-element dynamical core should achieve high performance levels on microprocessor-based parallel clusters and substantially accelerate the climate sim... View full abstract»

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  • Testing and evaluating atmospheric climate models

    Publication Year: 2002, Page(s):64 - 69
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (230 KB) | HTML iconHTML

    Model validation is a crucial process that underpins model development and gives confidence to the results from running models. This article discusses a range of techniques for validating atmosphere models given that the atmosphere is chaotic and incompletely observed. View full abstract»

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Aims & Scope

CS&E magazine emphasizes articles that help define the field as the interface among the applications (in science and engineering), algorithms (numerical and symbolic), system software, and computer architecture.

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Meet Our Editors

Editor-in-Chief
George K. Thiruvathukal
Loyola University