The Experts below are selected from a list of 4875 Experts worldwide ranked by ideXlab platform

Alexander Düster - One of the best experts on this subject based on the ideXlab platform.

  • The spectral cell method for wave propagation in heterogeneous materials simulated on multiple GPUs and CPUs
    Computational Mechanics, 2019
    Co-Authors: Farshid Mossaiby, Meysam Joulaian, Alexander Düster
    Abstract:

    Efficient simulation of wave propagation in heterogeneous materials is still a challenging task. The spectral cell method, representing a combination of spectral elements with the fictitious Domain Concept, has proven to be an efficient approach for wave propagation analysis in materials with complicated microstructure. In this paper, we report details of parallel implementation of the spectral cell method using multi-core CPUs as well as GPUs. In our CPU implementation, we employ the OpenMP directives to parallelize the loops. On GPUs, however, we use the OpenCL framework to develop single- and multi-GPU versions of the code. In all of our implementations, the core operation is a sparse matrix-vector multiplication (SpMV) kernel. We analyze each implementation to determine its features and bottlenecks. The results show that speedups of up to 128 relative to serial CPU code can be achieved using multi-GPU code.

  • The spectral cell method for wave propagation in heterogeneous materials simulated on multiple GPUs and CPUs
    Computational Mechanics, 2019
    Co-Authors: Farshid Mossaiby, Meysam Joulaian, Alexander Düster
    Abstract:

    Efficient simulation of wave propagation in heterogeneous materials is still a challenging task. The spectral cell method, representing a combination of spectral elements with the fictitious Domain Concept, has proven to be an efficient approach for wave propagation analysis in materials with complicated microstructure. In this paper, we report details of parallel implementation of the spectral cell method using multi-core CPUs as well as GPUs. In our CPU implementation, we employ the OpenMP directives to parallelize the loops. On GPUs, however, we use the OpenCL framework to develop single- and multi-GPU versions of the code. In all of our implementations, the core operation is a sparse matrix-vector multiplication (SpMV) kernel. We analyze each implementation to determine its features and bottlenecks. The results show that speedups of up to 128 relative to serial CPU code can be achieved using multi-GPU code.

Farshid Mossaiby - One of the best experts on this subject based on the ideXlab platform.

  • The spectral cell method for wave propagation in heterogeneous materials simulated on multiple GPUs and CPUs
    Computational Mechanics, 2019
    Co-Authors: Farshid Mossaiby, Meysam Joulaian, Alexander Düster
    Abstract:

    Efficient simulation of wave propagation in heterogeneous materials is still a challenging task. The spectral cell method, representing a combination of spectral elements with the fictitious Domain Concept, has proven to be an efficient approach for wave propagation analysis in materials with complicated microstructure. In this paper, we report details of parallel implementation of the spectral cell method using multi-core CPUs as well as GPUs. In our CPU implementation, we employ the OpenMP directives to parallelize the loops. On GPUs, however, we use the OpenCL framework to develop single- and multi-GPU versions of the code. In all of our implementations, the core operation is a sparse matrix-vector multiplication (SpMV) kernel. We analyze each implementation to determine its features and bottlenecks. The results show that speedups of up to 128 relative to serial CPU code can be achieved using multi-GPU code.

  • The spectral cell method for wave propagation in heterogeneous materials simulated on multiple GPUs and CPUs
    Computational Mechanics, 2019
    Co-Authors: Farshid Mossaiby, Meysam Joulaian, Alexander Düster
    Abstract:

    Efficient simulation of wave propagation in heterogeneous materials is still a challenging task. The spectral cell method, representing a combination of spectral elements with the fictitious Domain Concept, has proven to be an efficient approach for wave propagation analysis in materials with complicated microstructure. In this paper, we report details of parallel implementation of the spectral cell method using multi-core CPUs as well as GPUs. In our CPU implementation, we employ the OpenMP directives to parallelize the loops. On GPUs, however, we use the OpenCL framework to develop single- and multi-GPU versions of the code. In all of our implementations, the core operation is a sparse matrix-vector multiplication (SpMV) kernel. We analyze each implementation to determine its features and bottlenecks. The results show that speedups of up to 128 relative to serial CPU code can be achieved using multi-GPU code.

Leslie Carr - One of the best experts on this subject based on the ideXlab platform.

  • how to reuse a faceted classification and put it on the semantic web
    International Semantic Web Conference, 2010
    Co-Authors: Bene Rodriguezcastro, Hugh Glaser, Leslie Carr
    Abstract:

    There are ontology Domain Concepts that can be represented according to multiple alternative classification criteria. Current ontology modeling guidelines do not explicitly consider this aspect in the representation of such Concepts. To assist with this issue, we examined a Domain-specific simplified model for facet analysis used in Library Science. This model produces a Faceted Classification Scheme (FCS) which accounts for the multiple alternative classification criteria of the Domain Concept under scrutiny. A comparative analysis between a FCS and the Normalisation Ontology Design Pattern (ODP) indicates the existence of key similarities between the elements in the generic structure of both knowledge representation models. As a result, a mapping is identified that allows to transform a FCS into an OWL DL ontology applying the Normalisation ODP. Our contribution is illustrated with an existing FCS example in the Domain of "Dishwashing Detergent" that benefits from the outcome of this study.

  • International Semantic Web Conference (1) - How to reuse a faceted classification and put it on the semantic web
    Lecture Notes in Computer Science, 2010
    Co-Authors: Bene Rodriguez-castro, Hugh Glaser, Leslie Carr
    Abstract:

    There are ontology Domain Concepts that can be represented according to multiple alternative classification criteria. Current ontology modeling guidelines do not explicitly consider this aspect in the representation of such Concepts. To assist with this issue, we examined a Domain-specific simplified model for facet analysis used in Library Science. This model produces a Faceted Classification Scheme (FCS) which accounts for the multiple alternative classification criteria of the Domain Concept under scrutiny. A comparative analysis between a FCS and the Normalisation Ontology Design Pattern (ODP) indicates the existence of key similarities between the elements in the generic structure of both knowledge representation models. As a result, a mapping is identified that allows to transform a FCS into an OWL DL ontology applying the Normalisation ODP. Our contribution is illustrated with an existing FCS example in the Domain of "Dishwashing Detergent" that benefits from the outcome of this study.

  • On the practical modeling of Conceptual overlap among multiple facets in ontology Domain Concepts (Mini-thesis)
    2007
    Co-Authors: Bene Rodriguez-castro, Hugh Glaser, Leslie Carr
    Abstract:

    This report presents a study on the practical modelling of the Conceptual overlap that might exist among the multiple facets that define a particular ontology Domain Concept. The notions of Conceptual overlap and facet are defined, together with their relation to scenarios of multiple inheritance in ontology models. Starting from the notion of a value partition, a terminology of ontology modelling constructs is introduced that allows the characterization of two types of Conceptual overlap with respect to the Domain Concept being examined: internal and external. These considerations make explicit some of the implicit modelling decisions taken previously in the field of ontology modelling. It also puts forward, a methodology to address this problem in a structured manner comprised of a series of steps which include a specific entry and exit criterion. The contribution of this research is proven with the modelling of the Conceptual overlap in the “Fault” ontology Domain Concept that is part of the ReSIST project

Meysam Joulaian - One of the best experts on this subject based on the ideXlab platform.

  • The spectral cell method for wave propagation in heterogeneous materials simulated on multiple GPUs and CPUs
    Computational Mechanics, 2019
    Co-Authors: Farshid Mossaiby, Meysam Joulaian, Alexander Düster
    Abstract:

    Efficient simulation of wave propagation in heterogeneous materials is still a challenging task. The spectral cell method, representing a combination of spectral elements with the fictitious Domain Concept, has proven to be an efficient approach for wave propagation analysis in materials with complicated microstructure. In this paper, we report details of parallel implementation of the spectral cell method using multi-core CPUs as well as GPUs. In our CPU implementation, we employ the OpenMP directives to parallelize the loops. On GPUs, however, we use the OpenCL framework to develop single- and multi-GPU versions of the code. In all of our implementations, the core operation is a sparse matrix-vector multiplication (SpMV) kernel. We analyze each implementation to determine its features and bottlenecks. The results show that speedups of up to 128 relative to serial CPU code can be achieved using multi-GPU code.

  • The spectral cell method for wave propagation in heterogeneous materials simulated on multiple GPUs and CPUs
    Computational Mechanics, 2019
    Co-Authors: Farshid Mossaiby, Meysam Joulaian, Alexander Düster
    Abstract:

    Efficient simulation of wave propagation in heterogeneous materials is still a challenging task. The spectral cell method, representing a combination of spectral elements with the fictitious Domain Concept, has proven to be an efficient approach for wave propagation analysis in materials with complicated microstructure. In this paper, we report details of parallel implementation of the spectral cell method using multi-core CPUs as well as GPUs. In our CPU implementation, we employ the OpenMP directives to parallelize the loops. On GPUs, however, we use the OpenCL framework to develop single- and multi-GPU versions of the code. In all of our implementations, the core operation is a sparse matrix-vector multiplication (SpMV) kernel. We analyze each implementation to determine its features and bottlenecks. The results show that speedups of up to 128 relative to serial CPU code can be achieved using multi-GPU code.

Hugh Glaser - One of the best experts on this subject based on the ideXlab platform.

  • how to reuse a faceted classification and put it on the semantic web
    International Semantic Web Conference, 2010
    Co-Authors: Bene Rodriguezcastro, Hugh Glaser, Leslie Carr
    Abstract:

    There are ontology Domain Concepts that can be represented according to multiple alternative classification criteria. Current ontology modeling guidelines do not explicitly consider this aspect in the representation of such Concepts. To assist with this issue, we examined a Domain-specific simplified model for facet analysis used in Library Science. This model produces a Faceted Classification Scheme (FCS) which accounts for the multiple alternative classification criteria of the Domain Concept under scrutiny. A comparative analysis between a FCS and the Normalisation Ontology Design Pattern (ODP) indicates the existence of key similarities between the elements in the generic structure of both knowledge representation models. As a result, a mapping is identified that allows to transform a FCS into an OWL DL ontology applying the Normalisation ODP. Our contribution is illustrated with an existing FCS example in the Domain of "Dishwashing Detergent" that benefits from the outcome of this study.

  • International Semantic Web Conference (1) - How to reuse a faceted classification and put it on the semantic web
    Lecture Notes in Computer Science, 2010
    Co-Authors: Bene Rodriguez-castro, Hugh Glaser, Leslie Carr
    Abstract:

    There are ontology Domain Concepts that can be represented according to multiple alternative classification criteria. Current ontology modeling guidelines do not explicitly consider this aspect in the representation of such Concepts. To assist with this issue, we examined a Domain-specific simplified model for facet analysis used in Library Science. This model produces a Faceted Classification Scheme (FCS) which accounts for the multiple alternative classification criteria of the Domain Concept under scrutiny. A comparative analysis between a FCS and the Normalisation Ontology Design Pattern (ODP) indicates the existence of key similarities between the elements in the generic structure of both knowledge representation models. As a result, a mapping is identified that allows to transform a FCS into an OWL DL ontology applying the Normalisation ODP. Our contribution is illustrated with an existing FCS example in the Domain of "Dishwashing Detergent" that benefits from the outcome of this study.

  • On the practical modeling of Conceptual overlap among multiple facets in ontology Domain Concepts (Mini-thesis)
    2007
    Co-Authors: Bene Rodriguez-castro, Hugh Glaser, Leslie Carr
    Abstract:

    This report presents a study on the practical modelling of the Conceptual overlap that might exist among the multiple facets that define a particular ontology Domain Concept. The notions of Conceptual overlap and facet are defined, together with their relation to scenarios of multiple inheritance in ontology models. Starting from the notion of a value partition, a terminology of ontology modelling constructs is introduced that allows the characterization of two types of Conceptual overlap with respect to the Domain Concept being examined: internal and external. These considerations make explicit some of the implicit modelling decisions taken previously in the field of ontology modelling. It also puts forward, a methodology to address this problem in a structured manner comprised of a series of steps which include a specific entry and exit criterion. The contribution of this research is proven with the modelling of the Conceptual overlap in the “Fault” ontology Domain Concept that is part of the ReSIST project