Search Results - "Keen, D. A"

The missing boundary in the phase diagram of PbZr1−xTixO3 by Zhang, N., Yokota, H., Glazer, A. M., Ren, Z., Keen, D. A., Keeble, D. S., Thomas, P. A., Ye, Z.-G.

“…PbZr 1−x Ti x O 3 (PZT) is one of the most important and widely used piezoelectric materials. The study of its local and average structures is of fundamental…”
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Local-scale structures across the morphotropic phase boundary in PbZr1−xTixO3 by Zhang, Nan, Yokota, Hiroko, Glazer, A M, Keen, D A, Gorfman, Semën, Thomas, P A, Ren, Wei, Zuo-Guang Ye

“…Lead zirconate titanate (PZT) is one of the most widely studied piezoelectric materials, mainly because of its `mysterious' relationship between the so-called…”
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Vibrational Origin of the Thermal Stability in the High-Performance Piezoelectric Material GaAsO4 by Cambon, O, Bhalerao, G. M, Bourgogne, D, Haines, J, Hermet, P, Keen, D. A, Tucker, M. G

“…Theoretical calculations and experiments show the absence of libration modes of the tetrahedra in GaAsO4, the most α-quartz-type distorted material. In…”
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Training-related enhancement in the control of motor output in elderly humans by Keen, D A, Yue, G H, Enoka, R M

“…The increase in motor unit force that occurs with aging has been hypothesized to cause a decline in the ability to maintain a constant submaximal force. To…”
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Irreversible bone loss in former amenorrheic athletes by KEEN, A. D, DRINKWATER, B. L

“…Small gains in bone mineral density (BMD) have been reported in the first year following resumption of menses in amenorrheic athletes but there have been no…”
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Structural modelling of glasses using reverse Monte Carlo simulation by Keen, D. A, McGreevy, R. L

“…Reverse Monte Carlo simulation, in the study of glasses, is a newly developed technique in which a structural model is adjusted so as to minimize the…”
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Strength training improves the steadiness of slow lengthening contractions performed by old adults by Laidlaw, Douglass H, Kornatz, Kurt W, Keen, Douglas A, Suzuki, Shuji, Enoka, Roger M

“…1  Department of Kinesiology and Applied Physiology, University of Colorado, Boulder, Colorado 80309; 2  Department of Physiology, University of Arizona,…”
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Local-scale structures across the morphotropic phase boundary in PbZr 1- x Ti x O 3 by Zhang, Nan, Yokota, Hiroko, Glazer, A M, Keen, D A, Gorfman, Semën, Thomas, P A, Ren, Wei, Ye, Zuo-Guang

“…Lead zirconate titanate (PZT) is one of the most widely studied piezoelectric materials, mainly because of its 'mysterious' relationship between the so-called…”
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Identification of the Elusive Hydronium Ion Exchanging Roles with a Proton in an Enzyme at Lower pH Values by Kovalevsky, Andrey Y., Hanson, B. L., Mason, S. A., Yoshida, T., Fisher, S. Z., Mustyakimov, M., Forsyth, V. T., Blakeley, M. P., Keen, D. A., Langan, Paul

“…Visible to neutrons: Although thought to be involved in biological processes, hydronium ions had never been identified in biomacromolecular crystallographic…”
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From quantum disorder to magnetic order in an s=1/2 kagome lattice: a structural and magnetic study of herbertsmithite at high pressure by Kozlenko, D P, Kusmartseva, A F, Lukin, E V, Keen, D A, Marshall, W G, de Vries, M A, Kamenev, K V

“…The structural and magnetic properties of deuterated herbertsmithite have been studied by means of neutron powder diffraction and magnetic susceptibility…”
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Strength training can improve steadiness in persons with essential tremor by Bilodeau, Martin, Keen, Douglas A., Sweeney, Patrick J., Shields, Robert W., Enoka, Roger M.

“…We evaluated the effect of a strength‐training program on the ability of persons with essential tremor to exert steady forces with the index finger. Thirteen…”
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Combined neutron and X-ray scattering study of phosphate glasses by Hoppe, U, Kranold, R, Barz, A, Stachel, D, Neuefeind, J, Keen, D.A

“…The advantage of high resolving power and of different contrast of total X-ray and neutron diffraction (XRD and ND) experiments is demonstrated in studies of…”
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The Molecular Structure of (PSH+)(nido-7,8-C2B9H12 -) Determined by Neutron Diffraction (PS = Proton Sponge, 1,8-Bis(dimethylamino)naphthalene) by Fox, Mark A, Goeta, Andrés E, Howard, Judith A. K, Hughes, Andrew K, Johnson, Andrew L, Keen, Dave A, Wade, Ken, Wilson, Chick C

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Structural Evidence for a Fast-Ion Transition in the High-Pressure Rocksalt Phase of Silver Iodide by Keen, DA, Hull, S, Hayes, W, Gardner, NJ

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Crystal Structures and Ionic Conductivities of Ternary Derivatives of the Silver and Copper Monohalides: I. Superionic Phases of Stoichiometry MA4I5:RbAg4I5, KAg4I5, and KCu4I5 by Hull, S, Keen, D.A, Sivia, D.S, Berastegui, P

“…The superionic properties of the compounds RbAg4I5, KAg4I5 and KCu4I5 have been investigated by powder neutron diffraction and complex impedance spectroscopy…”
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HIGH-TEMPERATURE, STRUCTURAL DISORDER, PHASE TRANSITIONS AND PIEZOELECTRIC PROPERTIES OF GaPO4 by Haines, Julien, Cambon, Olivier, Prud'Homme, N., Fraysse, Guillaume, Keen, D. A., Chapon, L. C., Tucker, M.G.

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Semi‐analytic theory of multiphonon effects on the static structure factors of warm solids by Kitamura, Hikaru

“…A semi‐analytic formula for the temperature‐dependent static structure factor S(k) of polycrystalline and amorphous solids applicable to the entire wavenumber…”
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Structural disorder and loss of piezoelectric properties in α-quartz at high temperature by Haines, J., Cambon, O., Keen, D. A., Tucker, M. G., Dove, M. T.

“…The piezoelectric properties of α-quartz-based resonators, characterized by the mechanical quality factor, Q, are found to degrade beginning above 300 °C. This…”
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Structural units of binary vanadate glasses by X-ray and neutron diffraction by Hoppe, U., Ghosh, A., Feller, S., Hannon, A.C., Keen, D.A., Neuefeind, J.

“…•X-ray diffraction with high-energy photons resolves different lengths of V-O bonds.•The knowledge on distorted VO6 octahedra in crystal structures is…”
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Structural behaviour of metal–organic framework UiO-66 under extreme pressures by Robertson, G. P., Anzellini, S., Mosca, S., Keen, D. A., Bennett, T. D.

“…Abstract only…”
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