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  • 1
    Publication Date: 2013-09-19
    Description: Author(s): Thomas Olsen and Kristian S. Thygesen We assess the performance of a recently proposed renormalized adiabatic local density approximation (rALDA) for ab initio calculations of electronic correlation energies in solids and molecules. The method is an extension of the random phase approximation (RPA) derived from time-dependent density fu... [Phys. Rev. B 88, 115131] Published Wed Sep 18, 2013
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 2
    Publication Date: 2015-12-18
    Description: Author(s): S. Latini, T. Olsen, and K. S. Thygesen van der Waals heterostructures, created by stacking two-dimensional materials, represent a novel and largely unexplored class of materials with very interesting optoelectronic properties. Excitons, strongly bound electron-hole pairs, play a crucial role in determining these properties, especially in 2D materials where the electron-hole binding is strong. However, a complete understanding of excitonic effects in 2D layered materials, i.e., when the electronic system transitions from a 2D geometry to a 3D one, is still missing. Here, the authors present a first-principles based multiscale method that attempts to fill this gap. With the help of their framework, one can predict the optoelectronics properties of van der Waals heterostructures and make a closer connection between the available theoretical models and experimental measurements in these materials. [Phys. Rev. B 92, 245123] Published Thu Dec 17, 2015
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 3
    Publication Date: 2013-02-14
    Description: Author(s): Thomas Olsen and Kristian S. Thygesen The random phase approximation (RPA) is attracting renewed interest as a universal and accurate method for first-principles total energy calculations. The RPA naturally accounts for long-range dispersive forces without compromising accuracy for short-range interactions making the RPA superior to sem... [Phys. Rev. B 87, 075111] Published Wed Feb 13, 2013
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 4
    Publication Date: 2015-09-24
    Description: Author(s): Thomas S. Jauho, Thomas Olsen, Thomas Bligaard, and Kristian S. Thygesen The renormalized adiabatic PBE (rAPBE) method has recently been shown to comprise a significant improvement over the random phase approximation (RPA) for total energy calculations of simple solids and molecules. Here we consider the formation energies of 19 group I and II metal oxides and a few tran… [Phys. Rev. B 92, 115140] Published Mon Sep 21, 2015
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 5
    Publication Date: 2015-09-25
    Description: Author(s): Thomas Olsen and Ivo Souza Electrons in certain two-dimensional crystals possess a pseudospin degree of freedom associated with the existence of two inequivalent valleys in the Brillouin zone. If, as in monolayer MoS 2 , inversion symmetry is broken and time-reversal symmetry is present, equal and opposite amounts of k -space Be… [Phys. Rev. B 92, 125146] Published Thu Sep 24, 2015
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 6
    Publication Date: 2012-08-16
    Description: Author(s): Thomas Olsen and Kristian S. Thygesen The adiabatic connection fluctuation-dissipation theorem with the random phase approximation (RPA) has recently been applied with success to obtain correlation energies of a variety of chemical and solid state systems. The main merit of this approach is the improved description of dispersive forces ... [Phys. Rev. B 86, 081103] Published Wed Aug 15, 2012
    Keywords: Electronic structure and strongly correlated systems
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
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  • 7
    Publication Date: 2001-07-28
    Description: The entire pathway for synthesis of the tyrosine-derived cyanogenic glucoside dhurrin has been transferred from Sorghum bicolor to Arabidopsis thaliana. Here, we document that genetically engineered plants are able to synthesize and store large amounts of new natural products. The presence of dhurrin in the transgenic A. thaliana plants confers resistance to the flea beetle Phyllotreta nemorum, which is a natural pest of other members of the crucifer group, demonstrating the potential utility of cyanogenic glucosides in plant defense.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Tattersall, D B -- Bak, S -- Jones, P R -- Olsen, C E -- Nielsen, J K -- Hansen, M L -- Hoj, P B -- Moller, B L -- New York, N.Y. -- Science. 2001 Sep 7;293(5536):1826-8. Epub 2001 Jul 26.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Plant Biochemistry Laboratory, Department of Plant Biology, Centre for Molecular Plant Physiology, Department of Chemistry, Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, DK-1871, Frederiksberg C, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11474068" target="_blank"〉PubMed〈/a〉
    Keywords: Angiosperms/*enzymology/genetics ; Animals ; Arabidopsis/genetics/*metabolism ; Beetles/*physiology ; Chromatography, High Pressure Liquid ; Cytochrome P-450 Enzyme System/genetics/metabolism ; *Eating ; Food Chain ; *Genetic Engineering ; Glucosides/analysis/biosynthesis ; Mixed Function Oxygenases/genetics/metabolism ; Nitriles/analysis/*metabolism ; Pest Control, Biological/*methods ; Plant Leaves/genetics/metabolism ; Plants, Genetically Modified
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2002-05-23
    Description: Analysis of tetrapod footprints and skeletal material from more than 70 localities in eastern North America shows that large theropod dinosaurs appeared less than 10,000 years after the Triassic-Jurassic boundary and less than 30,000 years after the last Triassic taxa, synchronous with a terrestrial mass extinction. This extraordinary turnover is associated with an iridium anomaly (up to 285 parts per trillion, with an average maximum of 141 parts per trillion) and a fern spore spike, suggesting that a bolide impact was the cause. Eastern North American dinosaurian diversity reached a stable maximum less than 100,000 years after the boundary, marking the establishment of dinosaur-dominated communities that prevailed for the next 135 million years.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Olsen, P E -- Kent, D V -- Sues, H-D -- Koeberl, C -- Huber, H -- Montanari, A -- Rainforth, E C -- Fowell, S J -- Szajna, M J -- Hartline, B W -- New York, N.Y. -- Science. 2002 May 17;296(5571):1305-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12016313" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biological Evolution ; *Dinosaurs ; *Ecosystem ; Ferns ; *Fossils ; Geologic Sediments/chemistry ; Iridium/*analysis ; Meteoroids ; Minor Planets ; North America ; Spores ; Time
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
    Publication Date: 2001-07-07
    Description: To illuminate the function and evolutionary history of both genomes, we sequenced mouse DNA related to human chromosome 19. Comparative sequence alignments yielded confirmatory evidence for hypothetical genes and identified exons, regulatory elements, and candidate genes that were missed by other predictive methods. Chromosome-wide comparisons revealed a difference between single-copy HSA19 genes, which are overwhelmingly conserved in mouse, and genes residing in tandem familial clusters, which differ extensively in number, coding capacity, and organization between the two species. Finally, we sequenced breakpoints of all 15 evolutionary rearrangements, providing a view of the forces that drive chromosome evolution in mammals.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dehal, P -- Predki, P -- Olsen, A S -- Kobayashi, A -- Folta, P -- Lucas, S -- Land, M -- Terry, A -- Ecale Zhou, C L -- Rash, S -- Zhang, Q -- Gordon, L -- Kim, J -- Elkin, C -- Pollard, M J -- Richardson, P -- Rokhsar, D -- Uberbacher, E -- Hawkins, T -- Branscomb, E -- Stubbs, L -- New York, N.Y. -- Science. 2001 Jul 6;293(5527):104-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉DOE Joint Genome Institute, Walnut Creek, CA 94598, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11441184" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosome Breakage/genetics ; Chromosomes, Human, Pair 19/*genetics ; Conserved Sequence/*genetics ; Contig Mapping ; DNA, Satellite/genetics ; *Evolution, Molecular ; Exons/genetics ; Expressed Sequence Tags ; Gene Dosage ; Gene Order/genetics ; Genetic Linkage/genetics ; Genome ; Humans ; Long Interspersed Nucleotide Elements/genetics ; Mice ; Multigene Family/genetics ; Open Reading Frames/genetics ; Phylogeny ; Sequence Alignment ; Sequence Analysis, DNA ; Short Interspersed Nucleotide Elements/genetics ; Terminal Repeat Sequences/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
    Publication Date: 1999-07-10
    Description: The tumor necrosis factor (TNF) superfamily of cytokines includes both soluble and membrane-bound proteins that regulate immune responses. A member of the human TNF family, BLyS (B lymphocyte stimulator), was identified that induced B cell proliferation and immunoglobulin secretion. BLyS expression on human monocytes could be up-regulated by interferon-gamma. Soluble BLyS functioned as a potent B cell growth factor in costimulation assays. Administration of soluble recombinant BLyS to mice disrupted splenic B and T cell zones and resulted in elevated serum immunoglobulin concentrations. The B cell tropism of BLyS is consistent with its receptor expression on B-lineage cells. The biological profile of BLyS suggests it is involved in monocyte-driven B cell activation.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Moore, P A -- Belvedere, O -- Orr, A -- Pieri, K -- LaFleur, D W -- Feng, P -- Soppet, D -- Charters, M -- Gentz, R -- Parmelee, D -- Li, Y -- Galperina, O -- Giri, J -- Roschke, V -- Nardelli, B -- Carrell, J -- Sosnovtseva, S -- Greenfield, W -- Ruben, S M -- Olsen, H S -- Fikes, J -- Hilbert, D M -- New York, N.Y. -- Science. 1999 Jul 9;285(5425):260-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Human Genome Sciences, 9410 Key West Avenue, Rockville, MD 20850, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10398604" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; B-Cell Activating Factor ; B-Cell Activation Factor Receptor ; B-Lymphocyte Subsets/immunology ; B-Lymphocytes/*immunology ; Cell Line ; Cells, Cultured ; Humans ; Immunoglobulins/blood ; Interferon-gamma/pharmacology ; *Lymphocyte Activation ; Membrane Proteins/chemistry/genetics/pharmacology/*physiology ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Monocytes/*immunology ; Receptors, Cytokine/metabolism ; Receptors, Tumor Necrosis Factor/metabolism ; Recombinant Proteins/pharmacology ; Sequence Alignment ; Species Specificity ; Tumor Necrosis Factor-alpha/chemistry/genetics/pharmacology/*physiology ; Up-Regulation
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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