Now showing items 7651-7670 of 37101

    • Diode Evaluation and Series Diode Balancing for High-Voltage High-Frequency Power Converters 

      He, Yiou; Perreault, David J (Institute of Electrical and Electronics Engineers (IEEE), 2020-06)
      Miniaturization of high-voltage power converters is severely limited by the availability of fast switching, low-loss high-voltage diodes. This article explores techniques for using discrete low-voltage diodes in series as ...
    • Diode-Pumped Cryogenic Yb[superscript 3+]:YLF Laser of 100-W Output Power with High Beam Quality 

      Zapata, Luis E.; Miller, Daniel E.; Ripin, Daniel J.; Fan, Tso Yee (SPIE, 2010-03)
      A cryogenically cooled Yb:YLF laser with 224-W output power at 995 nm, linearly polarized along the c-axis, has been demonstrated, and laser oscillation has also been obtained polarized along the a-axis. The beam quality ...
    • Diode-Pumped Gigahertz Repetition Rate Femtosecond Cr:Lisaf Laser 

      Li, Duo; Demirbas, Umit; Birge, Jonathan R.; Petrich, Gale S.; Kolodziejski, Leslie A.; e.a. (Institute of Electrical and Electronics Engineers (IEEE), 2010-07)
      We report a low-cost, 1 GHz repetition-rate, diode-pumped, saturable Bragg reflectors mode-locked Cr:LiSAF laser, which generates nearly transform-limited 103-fs long pulses around 866 nm, with a record high peak power of 1.45 kW.
    • A Dioxane Template for Highly Selective Epoxy Alcohol Cyclizations 

      Mousseau, James; Morten, Christopher J.; Jamison, Timothy F. (Wiley Blackwell, 2013-06)
      Ladder polyether natural products are a class of natural products denoted by their high functional-group density and large number of well-defined stereocenters. They comprise the toxic component of harmful algal blooms ...
    • Dioxygen Activation in Soluble Methane Monooxygenase 

      Tinberg, Christine E.; Lippard, Stephen J. (American Chemical Society, 2011-03)
      The controlled oxidation of methane to methanol is a chemical transformation of great value, particularly in the pursuit of alternative fuels, but the reaction remains underutilized industrially because of inefficient and ...
    • Diphoton excess at 750 GeV: gluon–gluon fusion or quark–antiquark annihilation? 

      Gao, Jun; Zhang, Hao; Zhu, Hua Xing (Springer Berlin Heidelberg, 2016-06)
      Recently, ATLAS and CMS collaborations reported an excess in the measurement of diphoton events, which can be explained by a new resonance with a mass around 750 GeV. In this work, we explored the possibility of identifying ...
    • Dipolar recoupling in solid state NMR by phase alternating pulse sequences 

      Lin, J.; Bayro, Marvin J.; Khaneja, N.; Griffin, Robert Guy (Elsevier, 2008-12)
      We describe some new developments in the methodology of making heteronuclear and homonuclear recoupling experiments in solid state NMR insensitive to rf-inhomogeneity by phase alternating the irradiation on the spin system ...
    • A dipole polarizable potential for reduced and doped CeO[subscript 2] obtained from first principles 

      Burbano, Mario; Marrocchelli, Dario; Yildiz, Bilge; Norberg, Stefan T.; Hull, Stephen; e.a. (IOP Publishing, 2011-06)
      In this paper we present the parameterization of a new interionic potential for stoichiometric, reduced and doped CeO[subscript 2]. We use a dipole polarizable potential (DIPPIM: the dipole polarizable ion model) and ...
    • Diquark correlations in a hadron from lattice QCD 

      Green, Jeremy Russell; Engelhardt, M.; Negele, John W.; Varilly, Patrick (American Institute of Physics, 2011-07)
      Using lattice QCD, a diquark can be studied in a gauge-invariant manner by binding it to a static quark in a heavylight-light hadron. We compute the simultaneous two-quark density of a diquark, including corrections for ...
    • Dirac fermions and flat bands in the ideal kagome metal FeSn 

      Kang, Mingu; Ye, Linda; Fang, Shiang; You, Jhih-Shih; Levitan, Abraham; e.a. (Springer Science and Business Media LLC, 2019-12)
      A kagome lattice of 3d transition metal ions is a versatile platform for correlated topological phases hosting symmetry-protected electronic excitations and magnetic ground states. However, the paradigmatic states of the ...
    • Dirac operators and the very strange formula for Lie superalgebras 

      Frajria, Pierluigi Möseneder; Papi, Paolo; Kac, Victor (Springer International Publishing AG., 2014)
      Using a super-affine version of Kostant’s cubic Dirac operator, we prove a very strange formula for quadratic finite-dimensional Lie superalgebras with a reductive even subalgebra.
    • Dirac Reduction for Poisson Vertex Algebras 

      De Sole, Alberto; Valeri, Daniele; Kac, Victor (Springer Berlin Heidelberg, 2014-07)
      We construct an analogue of Dirac’s reduction for an arbitrary local or non-local Poisson bracket in the general setup of non-local Poisson vertex algebras. This leads to Dirac’s reduction of an arbitrary non-local Poisson ...
    • Dirac-electron-mediated magnetic proximity effect in topological insulator/magnetic insulator heterostructures 

      Zhao, Weiwei; Garlow, Joseph A.; Wu, Lijun; Zhu, Yimei; Chan, Moses H. W.; e.a. (American Physical Society (APS), 2017-11)
      The possible realization of dissipationless chiral edge current in a topological insulator/magnetic insulator heterostructure is based on the condition that the magnetic proximity exchange coupling at the interface is ...
    • Dirac-surface-state-dominated spin to charge current conversion in the topological insulator (Bi[subscript 0.22]Sb[subscript 0.78])[subscript 2]Te[subscript 3] films at room temperature 

      Mendes, J. B. S.; Alves Santos, O.; Holanda, J.; Loreto, R. P.; de Araujo, C. I. L.; e.a. (American Physical Society, 2017-11)
      We report the spin-to-charge current conversion in an intrinsic topological insulator (TI) (Bi[subscript 0.22]Sb[subscript 0.78])[subscript 2]Te[subscript 3] film at room temperature. The spin currents are generated in a ...
    • A Dirac–Dunkl Equation on S[superscript 2] and the Bannai–Ito Algebra 

      De Bie, Hendrik; Vinet, Luc; Genest, Vincent (Springer Berlin Heidelberg, 2016-05)
      The Dirac–Dunkl operator on the two-sphere associated to the Z[superscript 3][subscript 2] reflection group is considered. Its symmetries are found and are shown to generate the Bannai–Ito algebra. Representations of the ...
    • Direct 11CN-labeling of unprotected peptides via palladium-mediated sequential cross-coupling reactions 

      Zhao, Wenjun; Lee, Hong Geun; Buchwald, Stephen Leffler; Hooker, Jacob M. (American Chemical Society (ACS), 2017-05)
      A practical procedure for [superscript 11]CN-labeling of unprotected peptides has been developed. The method was shown to be highly chemoselective for cysteine over other potentially nucleophilic residues, and the radiolabeled ...
    • Direct Absorption Volumetric Molten Salt Receiver With Integral Storage 

      Codd, Daniel Shawn; Slocum Jr., Alexander H (ASME International, 2011-08)
      A new design is presented for a concentrating solar power central receiver system with integrated thermal storage. Concentrated sunlight penetrates and is absorbed within a passive molten salt pool, also acting as a ...
    • Direct and gestural interaction with relief: A 2.5D shape display 

      Leithinger, Daniel; Lakatos, David; DeVincenzi, Anthony; Blackshaw, Matthew; Ishii, Hiroshi (Association for Computing Machinery (ACM), 2011-10)
      Actuated shape output provides novel opportunities for experiencing, creating and manipulating 3D content in the physical world. While various shape displays have been proposed, a common approach utilizes an array of linear ...
    • Direct and indirect effects--an information theoretic perspective 

      Schamberg, Gabriel; Chapman, William; Xie, Shang-Ping; Coleman, Todd P. (Multidisciplinary Digital Publishing Institute, 2020-07)
      Information theoretic (IT) approaches to quantifying causal influences have experienced some popularity in the literature, in both theoretical and applied (e.g., neuroscience and climate science) domains. While these causal ...
    • Direct and quantitative broadband absorptance spectroscopy on small objects using Fourier transform infrared spectrometer and bilayer cantilever probes 

      Hsu, Wei-Chun; Tong, Jonathan K.; Liao, Bolin; Burg, Brian R.; Chen, Gang (American Institute of Physics, 2013-02)
      A measurement platform is introduced that combines a bilayer cantilever probe with a Fourier transform infrared spectrometer to measure absolute spectral absorptance between wavelengths of 3 μm and 18 μm directly and ...