T
Torgeir A. Ruden
Researcher at University of Oslo
Publications - 19
Citations - 3466
Torgeir A. Ruden is an academic researcher from University of Oslo. The author has contributed to research in topics: Coupled cluster & Density functional theory. The author has an hindex of 14, co-authored 19 publications receiving 3236 citations. Previous affiliations of Torgeir A. Ruden include Center for Information Technology.
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Journal ArticleDOI
The Dalton quantum chemistry program system
Kestutis Aidas,Celestino Angeli,Keld L. Bak,Vebjørn Bakken,Radovan Bast,Linus Boman,Ove Christiansen,Renzo Cimiraglia,Sonja Coriani,Pål Dahle,Erik K. Dalskov,Ulf Ekström,Thomas Enevoldsen,Janus J. Eriksen,Patrick Ettenhuber,Berta Fernández,Lara Ferrighi,Heike Fliegl,Luca Frediani,Kasper Hald,Asger Halkier,Christof Hättig,Hanne Heiberg,Trygve Helgaker,Alf C. Hennum,Hinne Hettema,Eirik Hjertenæs,Stine Høst,Ida-Marie Høyvik,Maria Francesca Iozzi,Brannislav Jansik,Hans-Jørgen Aa. Jensen,Dan Jonsson,Poul Jørgensen,Johanna Kauczor,Sheela Kirpekar,Thomas Kjærgaard,Wim Klopper,Stefan Knecht,Rika Kobayashi,Henrik Koch,Jacob Kongsted,Andreas Krapp,Kasper Kristensen,Andrea Ligabue,Ola B. Lutnæs,Juan Ignacio Melo,Kurt V. Mikkelsen,Rolf H. Myhre,Christian Neiss,Christian B. Nielsen,Patrick Norman,Jeppe Olsen,Jógvan Magnus Haugaard Olsen,Anders Osted,Martin J. Packer,Filip Pawłowski,Thomas Bondo Pedersen,Patricio Federico Provasi,Simen Reine,Zilvinas Rinkevicius,Torgeir A. Ruden,Kenneth Ruud,Vladimir V. Rybkin,Paweł Sałek,Claire C. M. Samson,Alfredo Sánchez de Merás,Trond Saue,Stephan P. A. Sauer,Bernd Schimmelpfennig,Kristian Sneskov,Arnfinn Hykkerud Steindal,Kristian O. Sylvester-Hvid,Peter R. Taylor,Andrew M. Teale,Erik I. Tellgren,David P. Tew,Andreas J. Thorvaldsen,Lea Thøgersen,Olav Vahtras,Mark A. Watson,David J. D. Wilson,Marcin Ziółkowski,Hans Ågren +83 more
TL;DR: Dalton is a powerful general‐purpose program system for the study of molecular electronic structure at the Hartree–Fock, Kohn–Sham, multiconfigurational self‐consistent‐field, Møller–Plesset, configuration‐interaction, and coupled‐cluster levels of theory.
Dalton, a molecular electronic structure program
Hans Ågren,David John. Wilson,Olav Vahtras,Peter R. Taylor,Kristian O. Sylvester-Hvid,Bernd Schimmelpfennig,Stephan P. A. Sauer,Trond Saue,A. M. J. Sanchez de Meras,Paweł Sałek,Kenneth Ruud,Torgeir A. Ruden,Elias Rudberg,Zilvinas Rinkevicius,Thomas Bondo Pedersen,Martin J. Packer,Jeppe Olsen,Patrick Norman,Kurt V. Mikkelsen,Ola B. Lutnæs,Henrik Koch,Rika Kobayashi,Wim Klopper,Sheela Kirpekar,P. Joergensen,D. Jonsson,H. J. Aa. Jensen,Hinne Hettema,Trygve Helgaker,H. Heiberg,Asger Halkier,Kasper Hald,C. Haettig,Berta Fernández,Thomas Enevoldsen,E. K. Dalskov,Pål Dahle,Sonia Coriani,Renzo Cimiraglia,Ove Christiansen,Vebjørn Bakken,Keld L. Bak,Celestino Angeli +42 more
Journal ArticleDOI
AIR: A batch-oriented web program package for construction of supermatrices ready for phylogenomic analyses
Surendra Kumar,Åsmund Skjæveland,Russell J. S. Orr,Pål Enger,Torgeir A. Ruden,Bjørn-Helge Mevik,Fabien Burki,Andreas Botnen,Kamran Shalchian-Tabrizi +8 more
TL;DR: The AIR program package allows for efficient creation of multigene alignments and better assessment of evolutionary rates in sequence alignments, resulting in improved phylogenetic resolution and increased statistical support for branching patterns among the early diverging eukaryotes.
Journal ArticleDOI
Multigene phylogeny of choanozoa and the origin of animals.
Kamran Shalchian-Tabrizi,Marianne A. Minge,Mari Espelund,Russell J. S. Orr,Torgeir A. Ruden,Kjetill S. Jakobsen,Thomas Cavalier-Smith +6 more
TL;DR: Phylogenetic trees using 78 proteins show that Ministeria is not sister to animals or choanoflagellates (themselves sisters to animals), but to Capsaspora, another protozoan with thread-like (filose) tentacles, while trees show ichthyosporean choanozoans as sisters to filozoa
Journal ArticleDOI
A priori calculation of molecular properties to chemical accuracy
TL;DR: In this article, a review of the methods for the calculation of molecular properties to chemical accuracy is presented, with emphasis on coupled-cluster theory and electron correlation in terms of virtual excitations from occupied to virtual molecular orbitals.