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Ryan M. Olson
Researcher at Iowa State University
Publications - 15
Citations - 1183
Ryan M. Olson is an academic researcher from Iowa State University. The author has contributed to research in topics: Coupled cluster & Density functional theory. The author has an hindex of 12, co-authored 15 publications receiving 1142 citations. Previous affiliations of Ryan M. Olson include Oak Ridge National Laboratory & University of Southern California.
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A new hierarchical parallelization scheme: Generalized distributed data interface (GDDI), and an application to the fragment molecular orbital method (FMO)
TL;DR: A two‐level hierarchical scheme, generalized distributed data interface (GDDI), implemented into GAMESS is presented and is found to be a flexible tool easily utilizing network topology and delivering excellent performance even on slow networks.
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Where does the planar-to-nonplanar turnover occur in small gold clusters?
Ryan M. Olson,Sergey A. Varganov,Mark S. Gordon,Horia Metiu,Steeve Chrétien,Piotr Piecuch,Karol Kowalski,Stanisław A. Kucharski,Monika Musiał +8 more
TL;DR: Several levels of theory, including both Gaussian-based and plane wave density functional theory (DFT), second-order perturbation theory (MP2), and coupled cluster methods (CCSD(T)), are employed to study Au6 and Au8 clusters.
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Enthalpies of Formation of Gas-Phase N3, N3-, N5+, and N5- from Ab Initio Molecular Orbital Theory, Stability Predictions for N5+N3- and N5+N5-, and Experimental Evidence for the Instability of N5+N3-
David A. Dixon,David F. Feller,Karl O. Christe,William W. Wilson,Ashwani Vij,Vandana Vij,H. Donald Brooke Jenkins,Ryan M. Olson,Mark S. Gordon +8 more
TL;DR: Born-Haber cycle calculations, using estimated lattice energies and the adiabatic ionization potentials of the anions and electron affinities of the cations, enable reliable stability predictions for the hypothetical N5 (+)N3(-) and N5(+)N5(-) salts.
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A Novel Approach to Parallel Coupled Cluster Calculations: Combining Distributed and Shared Memory Techniques for Modern Cluster Based Systems
TL;DR: A parallel coupled cluster algorithm that combines distributed and shared memory techniques for the CCSD(T) method (singles + doubles with perturbative triples) is described, targeted at modern cluster based architectures that are comprised of multiprocessor nodes connected by a dedicated communication network.
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The interaction of oxygen with small gold clusters
TL;DR: In this paper, the results of a quantum chemical study of oxygen adsorption on small Aun and Aun− (n=2,3) clusters were presented, where density functional theory (DFT), second order perturbation theory (MP2), and singles and doubles coupled cluster theory with perturbative triples [CCSDT] methods were used to determine the geometry and the binding energy of oxygen to Aun.