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Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - Symmetric multiprocessors (SMPs) dominate the high-end server market and are currently the primary candidate for constructing large scale multiprocessor systems. Yet, the design of e cient parallel algorithms for this platform c- rently poses several challenges. The reason for this is that the rapid progress in microprocessor speed has left main memory access as the primary limitation to SMP performance. Since memory is the bottleneck, simply increasing the n- ber of processors will not necessarily yield better performance. Indeed, memory bus limitations typically limit the size of SMPs to 16 processors. This has at least twoimplicationsfor the algorithmdesigner. First, since there are relatively few processors availableon an SMP, any parallel algorithm must be competitive with its sequential counterpart with as little as one processor in order to be r- evant. Second, for the parallel algorithm to scale with the number of processors, it must be designed with careful attention to minimizing the number and type of main memory accesses. In this paper, we present a computational model for designing e cient al- rithms for symmetric multiprocessors. We then use this model to create e cient solutions to two widely di erent types of problems - linked list pre x com- tations and generalized sorting. Both problems are memory intensive, but in die rent ways. Whereas generalized sorting algorithms typically require a large numberofmemoryaccesses, they areusuallytocontiguousmemorylocations. By contrast, prex computation algorithms typically require a more modest qu- tity of memory accesses, but they are are usually to non-contiguous memory locations.…

Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - The aim of the annual Workshop on Algorithm Engineering and Experiments (ALENEX)istoprovideaforumforthepresentationoforiginalresearchinthe implementationandexperimentalevaluationofalgorithmsanddatastructures. ALENEX2001,thethirdintheseries,washeldinWashington,DC,onJanuary 5 6, 2001. This volume collects extended versions of the 15 papers that were selected for presentation from a pool of 31 submissions. It also includes the abstracts from the three invited speakers, who were supported by DIMACS SpecialFocusonNextGenerationNetworks. Wewouldliketotakethisopportunitytothankthesponsors,authors,and reviewers that made ALENEX 2001 a success. We would also like to thank Springer-Verlag for publishing these papers in their series ofLecture Notes in ComputerScience. June2001 AdamBuchsbaum JackSnoeyink ALENEX2001Sponsors Thefollowingprovideddirect nancialsupport,whichenabledustohostinvited speakersandprovidereducedregistrationfeestostudents. DIMACSSpecialFocusonNextGenerationNetworks TheHopkinsCenterforAlgorithmEngineering NECResearchInstitute Thefollowingprovidedin-kindsupport,facilitatingtheworkshop. AT&T SIAM,theSocietyforIndustrialandAppliedMathematics SIGACT,theACMSIGonAlgorithmsandComputationTheory ALENEX2001ProgramCommittee NinaAmenta,(UniversityofTexas,Austin) AdamBuchsbaum,(AT&TLabs Research;Co-chair) RudolfFleischer,(HongKongUniversityofScience&Technology) LyleMcGeoch,(AmherstCollege) S. Muthukrishnan,(AT&TLabs Research) JackSnoeyink,(UniversityofNorthCarolina,ChapelHill;Co-chair) MattStallmann(NorthCarolinaStateUniversity) DorotheaWagner(Universit atKonstanz) VI Preface ALENEX 01ExternalReviewers SunilArya RolfDrechsler MarinaPapatrianta lou LydiaAyers LeszekGasieniec FrankSchulz ThereseBiedl Ra aeleGiancarlo MichaelSeel UlrikBrandes RobertoGrossi JopSibeyn FrancBrglez DavidJohnson RobertoSolis-Oba KenClarkson JuhaK arkk ainen ThomasWillhalm SabineCornelsen BernardMoret ALENEXSteeringCommittee RobertoBattiti(UniversityofTrento,Italy) AndrewV. Goldberg(IntertrustSTARLab) MichaelT. Goodrich(JohnsHopkinsUniversity) DavidS. Johnson(AT&TBellLaboratories) CatherineC. McGeoch(AmherstCollege) BernardM. E. Moret(UniversityofNewMexico,chair) TableofContents ALENEX 01 Solvinga Hard ProblemtoApproximatean Easy One:Heuristicsfor MaximumMatchingsandMaximumTravelingSalesmanProblems. . . . . . . 1 S. P. Fekete (TU Berlin), H. Meijer (Queen s University), A. Rohe (Universit atBonn),andW. Tietze(TUBerlin) CNOP APackageforConstrainedNetworkOptimization. . . . . . . . . . . . . 17 K. MehlhornandM. Ziegelmann(MPISaarbrucken) TheAsymmetricTravelingSalesmanProblem: Algorithms,InstanceGenerators,andTests. . . . . . . . . . . . . . . . . . . . . . . . . . . 32 J. Cirasella (Boston Arch. Center Library), D. S. Johnson (AT&T), L. A. McGeoch,(AmherstCollege),andW. Zhang(WUSTL) NetworkTomographythroughEnd-to-EndMeasurements . . . . . . . . . . . . . . 60 D. Towsley(UMass. ,Amherst) ExperimentalResultsonStatisticalApproaches toPageReplacementPolicies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 V. Leung (Sandia National Laboratories) and S. Irani (University of California,Irvine) EstimatingResemblanceofMIDIDocuments. . . . . . . . . . . . . . . . . . . . . . . . . . 78 M. MitzenmacherandS. Owen(Harvard) ExperimentsonAdaptiveSetIntersectionsforTextRetrievalSystems. . . . 91 E. D. Demaine(UWaterloo),A. L opez-Ortiz(Univ. ofNewBrunswick), andJ. I. Munro(UWaterloo) PVD:AStableImplementationforComputingVoronoiDiagrams ofPolygonalPockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 S. Sethia,M. Held,andJ. S. B. Mitchell(SUNYStonyBrook) HierarchicalClusteringofTrees:AlgorithmsandExperiments. . . . . . . . . . . 117 I. FinocchiandR. Petreschi(Universit`adiRoma LaSapienza ) TravelPlanningwithSelf-MadeMaps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132 U. Brandes, F. Schulz, D. Wagner, and T. …

Taschenbuch. Zustand: Neu. Algorithm Engineering and Experimentation | Third International Workshop, ALENEX 2001, Washington, DC, USA, January 5-6, 2001. Revised Papers | Adam L. Buchsbaum (u. a.) | Taschenbuch | viii | Englisch | 2001 | Springer | EAN 9783540425601 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu.…