Search Results - "Keen, DA"

A comparison of various commonly used correlation functions for describing total scattering by Keen, David A.

“…Total scattering, an increasingly important crystallographic research area, is defined theoretically in terms of correlation functions. Different researchers…”
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Negative thermal expansion in ZrW2O8 : Mechanisms, rigid unit modes, and neutron total scattering by TUCKER, Matthew G, GOODWIN, Andrew L, DOVE, Martin T, KEEN, David A, WELLS, Stephen A, EVANS, John S. O

“…The local structure of the low-temperature ordered phase of the negative thermal expansion (NTE) material has been investigated by reverse Monte Carlo (RMC)…”
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Common Input to Motor Neurons Innervating the Same and Different Compartments of the Human Extensor Digitorum Muscle by Keen, Douglas A, Fuglevand, Andrew J

“…Department of Physiology, University of Arizona, Tucson, Arizona 85721 Submitted 7 July 2003; accepted in final form 4 September 2003 Short-term…”
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Magnetic structure of MnO at 10 K from total neutron scattering data by Goodwin, Andrew L, Tucker, Matthew G, Dove, Martin T, Keen, David A

“…Total neutron scattering data from a powdered sample of MnO collected at 10 K have been analyzed using the reverse Monte Carlo method to refine the nuclear and…”
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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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Re-evaluation of muscle wisdom in the human adductor pollicis using physiological rates of stimulation by Fuglevand, Andrew J., Keen, Douglas A.

“…Motor unit discharge rates decline by about 50 % over 60 s of a sustained maximum voluntary contraction (MVC). It has been suggested that this decline in…”
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Role of intertendinous connections in distribution of force in the human extensor digitorum muscle by Keen, Douglas A., Fuglevand, Andrew J.

“…The human extensor digitorum (ED) muscle gives rise distally to multiple tendons that insert onto and extend digits 2–5. It has been shown previously that the…”
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Application of the reverse Monte Carlo method to crystalline materials by Tucker, Matthew G., Dove, Martin T., Keen, David A.

“…An implementation of the reverse Monte Carlo (RMC) method for the study of crystalline materials from polycrystalline neutron total scattering data is…”
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Distribution of Motor Unit Force in Human Extensor Digitorum Assessed By Spike-Triggered Averaging and Intraneural Microstimulation by Keen, Douglas A, Fuglevand, Andrew J

“…Department of Physiology, University of Arizona, Tucson, Arizona 85721 Submitted 8 December 2003; accepted in final form 9 January 2004 A peculiar aspect of…”
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Evaluation of plateau‐potential‐mediated ‘warm up’ in human motor units by Fuglevand, Andrew J., Dutoit, Andrea P., Johns, Richard K., Keen, Douglas A.

“…Spinal motor neurones can exhibit sustained depolarization in the absence of maintained synaptic or injected current. This phenomenon, referred to as a plateau…”
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Model-independent extraction of dynamical information from powder diffraction data by GOODWIN, Andrew L, TUCKER, Matthew G, COPE, Elizabeth R, DOVE, Martin T, KEEN, David A

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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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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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Phonons from powder diffraction: A quantitative model-independent evaluation by GOODWIN, Andrew L, TUCKER, Matthew G, DOVE, Martin T, KEEN, David A

“…We describe a model-independent approach for the extraction of detailed lattice dynamics information from neutron powder diffraction data, based on a…”
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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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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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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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Refining disordered structural models using reverse monte carlo methods: Application to vitreous silica by Keen, David A.

“…The Reverse Monte Carlo (RMC) modelling technique produces a structural model which is only constrained to agree with the available experimental data. For…”
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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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High-pressure dissociation of silver mercury iodide, Ag2HgI4 by Parfitt, D.C., Hull, S., Keen, D.A., Crichton, W.

“…Representative X-ray diffraction spectra illustrating the pressure-induced dissociation of Ag2HgI4 into rocksalt-structured AgI (marked with arrows in the…”
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