<?xml version="1.0"?>

<!DOCTYPE owl [
  <!ENTITY rdf "http://www.w3.org/1999/02/22-rdf-syntax-ns#">
  <!ENTITY rdfs "http://www.w3.org/2000/01/rdf-schema#">
  <!ENTITY xsd "http://www.w3.org/2001/XMLSchema#">
  <!ENTITY owl "http://www.w3.org/2002/07/owl#">
  <!ENTITY cc "http://web.resource.org/cc/#">
  <!ENTITY event "http://ebiquity.umbc.edu/ontology/event.owl#">
  <!ENTITY person "http://ebiquity.umbc.edu/ontology/person.owl#">
  <!ENTITY assert "http://ebiquity.umbc.edu/ontology/assertion.owl#">]>

<!--
  This ontology document is licensed under the Creative Commons
  Attribution License. To view a copy of this license, visit
  http://creativecommons.org/licenses/by/2.0/ or send a letter to
  Creative Commons, 559 Nathan Abbott Way, Stanford, California
  94305, USA.
-->

<rdf:RDF 
  xmlns:rdf = "&rdf;"
  xmlns:rdfs = "&rdfs;"
  xmlns:xsd = "&xsd;"
  xmlns:owl = "&owl;"
  xmlns:cc = "&cc;"
  xmlns:event = "&event;"
  xmlns:person = "&person;"
  xmlns:assert = "&assert;">
  <event:Event rdf:about="http://ebiquity.umbc.edu/event/html/id/219/Scalable-Solver-Infrastructure-for-Computational-Science-Engineering">
    <rdfs:label><![CDATA[Scalable Solver Infrastructure for Computational Science & Engineering]]></rdfs:label>
    <event:title><![CDATA[Scalable Solver Infrastructure for Computational Science & Engineering]]></event:title>
    <event:speaker><person:Collaborator rdf:about="http://ebiquity.umbc.edu/person/html/David/Keyes/"><person:name><![CDATA[David  Keyes]]></person:name><rdfs:label><![CDATA[David  Keyes]]></rdfs:label></person:Collaborator></event:speaker>
    <event:startDate rdf:datatype="&xsd;dateTime">2007-10-26T14:30:00-05:00</event:startDate>
    <event:endDate rdf:datatype="&xsd;dateTime">2007-10-26T15:30:00-05:00</event:endDate>
    <event:location><![CDATA[LH3 UMBC]]></event:location>
    <event:abstract><![CDATA[Multiscale, multirate scientific and engineering applications based on systems of partial differential equations possess resolution requirements that demand execution on the highest-capability computers available, which will soon reach the petascale. While the variety of applications is enormous, their needs for mathematical software infrastructure are surprisingly coincident. Implicit methods for transient and equilibrium problems lead after discretization to large, ill-conditioned algebraic systems. The chief to bottleneck to scalability is often the solver. At their current scalability limits, many applications spend a vast majority of their operations in solvers, due to solver algorithmic complexity that is superlinear in the problem size, whereas other phases scale linearly. Furthermore, the solver may be the phase of the simulation with the poorest parallel scalability, due to intrinsic global dependencies. The Towards Optimal Petascale Simulations (TOPS, www.scidac.gov/math/TOPS.html) project focuses on ameliorating this bottleneck while providing a multilevel programming interface that allows users to advance from initial concerns of correctness and robustness to ultimate concerns of efficiency and performance portability by experimenting with a variety of solvers. We begin with an overview of the diverse petascale hardware roadmaps at the laboratories served by the TOPS project, with such applications as electromagnetism, magnetohydrodynamics, and quantum chromodynamics. We then describe the algorithmic and software roadmap of TOPS, which includes such well-known packages as Hypre, PETSc, SUNDIALS, SuperLU, and Trilinos. ]]></event:abstract>
    <event:uri><![CDATA[http://www.math.umbc.edu/~muruhan/MathColl/oct26_07.htm]]></event:uri>
    <event:tag><![CDATA[high performance computing]]></event:tag>
    <event:tag><![CDATA[parallel computing]]></event:tag>
    <event:host><person:Collaborator rdf:about="http://ebiquity.umbc.edu/person/html/Matthias/Gobbert/"><person:name><![CDATA[Matthias  Gobbert]]></person:name><rdfs:label><![CDATA[Matthias  Gobbert]]></rdfs:label></person:Collaborator></event:host>
  </event:Event>

  <rdf:Description rdf:about="">
    <cc:License rdf:resource="http://creativecommons.org/licenses/by/2.0/" />
  </rdf:Description>

</rdf:RDF>
