Publications

Results 4101–4150 of 9,998

Search results

Jump to search filters

The Portals 4.1 Network Programming Interface

Barrett, Brian; Brightwell, Ronald B.; Grant, Ryan E.; Hemmert, Karl S.; Laros, James H.; Wheeler, Kyle; Underwood, Keith; Riesen, Rolf; Maccabe, Arthur B.; Hudson, Trammel

This report presents a specification for the Portals 4 networ k programming interface. Portals 4 is intended to allow scalable, high-performance network communication betwee n nodes of a parallel computing system. Portals 4 is well suited to massively parallel processing and embedded syste ms. Portals 4 represents an adaption of the data movement layer developed for massively parallel processing platfor ms, such as the 4500-node Intel TeraFLOPS machine. Sandia's Cplant cluster project motivated the development of Version 3.0, which was later extended to Version 3.3 as part of the Cray Red Storm machine and XT line. Version 4 is tar geted to the next generation of machines employing advanced network interface architectures that support enh anced offload capabilities.

More Details
TYPE SAND Report YEAR 2017
DOIOSTI

Quantum-Accurate Molecular Dynamics Potential for Tungsten

Wood, Mitchell A.; Thompson, Aidan P.

The purpose of this short contribution is to report on the development of a Spectral Neighbor Analysis Potential (SNAP) for tungsten. We have focused on the characterization of elastic and defect properties of the pure material in order to support molecular dynamics simulations of plasma-facing materials in fusion reactors. A parallel genetic algorithm approach was used to efficiently search for fitting parameters optimized against a large number of objective functions. In addition, we have shown that this many-body tungsten potential can be used in conjunction with a simple helium pair potential1 to produce accurate defect formation energies for the W-He binary system.

More Details
TYPE Other Report YEAR 2017
DOIOSTI
Results 4101–4150 of 9,998
Results 4101–4150 of 9,998