Publications

Results 2151–2175 of 9,998

Search results

Jump to search filters

A vision for managing extreme-scale data hoards

Proceedings - International Conference on Distributed Computing Systems

Logan, Jeremy; Mehta, Kshitij; Heber, Gerd; Klasky, Scott; Kurc, Tahsin; Podhorszki, Norbert; Widener, Patrick W.; Wolf, Matthew

Scientific data collections grow ever larger, both in terms of the size of individual data items and of the number and complexity of items. To use and manage them, it is important to directly address issues of robust and actionable provenance. We identify three key drivers as our focus: managing the size and complexity of metadata, lack of a priori information to match usage intents between publishers and consumers of data, and support for campaigns over collections of data driven by multi-disciplinary, collaborating teams. We introduce the Hoarde abstraction as an attempt to formalize a way of looking at collections of data to make them more tractable for later use. Hoarde leverages middleware and systems infrastructures for scientific and technical data management. Through the lens of a select group of challenging data usage scenarios, we discuss some of the aspects of implementation, usage, and forward portability of this new view on data management.

More Details
TYPE Conference Poster YEAR 2019
DOIOSTIScopus

Compatible meshfree discretization of surface PDEs

Computational Particle Mechanics

Trask, Nathaniel A.; Kuberry, Paul A.

Meshfree discretization of surface partial differential equations is appealing, due to their ability to naturally adapt to deforming motion of the underlying manifold. In this work, we consider an existing scheme proposed by Liang et al. reinterpreted in the context of generalized moving least squares (GMLS), showing that existing numerical analysis from the GMLS literature applies to their scheme. With this interpretation, their approach may then be unified with recent work developing compatible meshfree discretizations for the div-grad problem in Rd. Informally, this is analogous to an extension of collocated finite differences to staggered finite difference methods, but in the manifold setting and with unstructured nodal data. In this way, we obtain a compatible meshfree discretization of elliptic problems on manifolds which is naturally stable for problems with material interfaces, without the need to introduce numerical dissipation or local enrichment near the interface. As a result, we provide convergence studies illustrating the high-order convergence and stability of the approach for manufactured solutions and for an adaptation of the classical five-strip benchmark to a cylindrical manifold.

More Details
TYPE Journal Article YEAR 2019
DOIOSTI
Results 2151–2175 of 9,998
Results 2151–2175 of 9,998