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172 results on '"Pomeroy, V"'

1. Prevalence, Trajectory, and Predictors of Poststroke Pain: Retrospective Analysis of Pooled Clinical Trial Data Set

Author

Ali, Myzoon, Tibble, Holly, Brady, Marian C., Quinn, Terence J., Sunnerhagen, Katharina S., Venketasubramanian, Narayanaswamy, Shuaib, Ashfaq, Pandyan, Anand, Mead, Gillian, Lees, K.R., Alexandrov, A., Bath, P.M., Bluhmki, E., Bornstein, N., Chen, C., Claesson, L., Curram, J., Davis, S.M., Diener, H-C., Donnan, G., Fisher, M., Ginsberg, M., Gregson, B., Grotta, J., Hacke, W., Hennerici, M.G., Hommel, M., Kaste (Emeritus), M., Lyden, P., Marler, J., Muir, K., Roffe, C., Teal, P., Wahlgren, N.G., Warach, S., Ali, M., Ashburn, A., Barer, D., Barzel, A., Bernhardt, J., Bowen, A., Drummond, A., Edmans, J., English, C., Gladman (Emeritus), J., Godecke, E., Hiekkala, S., Hoffman, T., Kalra, L., Kuys, S., Langhorne, P., Laska, A.C., Lees, K.R., Logan, P., Machner, B., Morris, J., Pollock, A., Pomeroy, V., Rodgers, H., Sackley, C., Shaw, L., Stott, D.J., Tyson, S., van Vliet, P., Walker, M., Whiteley, W., Hanley, D.F., Butcher, K., Davis, S., Gregson, B., Lees, K.R., Lyden, P., Mayer, S., Muir, K., and Steiner, T.

Published
2023
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2. Using the Barthel Index and modified Rankin Scale as Outcome Measures for Stroke Rehabilitation Trials; A Comparison of Minimum Sample Size Requirements

Author

Brady, M.C, Ali, M, Ashburn, A, Barer, D, Barzel, A, Bernhardt, J, Bowen, A, Drummond, A, Edmans, J, English, C, Gladman, J, Godecke, E, Hiekkala, S, Hoffman, T, Kalra, L, Kuys, S, Langhorne, P, Laska, A.C, Lees, K, Logan, P, Machner, B, Mead, G, Morris, J, Pandyan, A, Pollock, A, Pomeroy, V, Rodgers, H, Sackley, C, Shaw, L, Stott, D.J, Sunnerhagen, K.S, Tyson, S, van Vliet, P, Walker, M, Whiteley, W, McGill, Kris, Sackley, Catherine, Godwin, Jon, Gavaghan, David, Ali, Myzoon, Ballester, Belen Rubio, and Brady, Marian C

Published
2022
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3. Measurement of parity-nonconserving rotation of neutron spin in the 0.734-eV p-wave resonance of $^{139}La$

Author

Haseyama, T., Asahi, K., Bowman, J. D., Delheij, P. P. J., Funahashi, H., Ishimoto, S., Jones, G., Masaike, A., Masuda, Y., Matsuda, Y., Morimoto, K., Muto, S., Penttilä, S. I., Pomeroy, V. R., Sakai, K., Sharapov, E. I., Smith, D. A., and Yuan, V. W.

Subjects
Nuclear Experiment
Abstract

The parity nonconserving spin rotation of neutrons in the 0.734-eV p-wave resonance of $^{139}La$ was measured with the neutron transmission method. Two optically polarized $^3He$ cells were used before and behind a a 5-cm long $^{139}La$ target as a polarizer and an analyzer of neutron spin. The rotation angle was carefully measured by flipping the direction of $^3He$ polarization in the polarizer in sequence. The peak-to-peak value of the spin rotation was found to be $ (7.4 \pm 1.1) \times 10^{-3} $ rad/cm which was consistent with the previous experiments. But the result was statisticallly improved. The s-p mixing model gives the weak matrix element as $xW = (1.71 \pm 0.25)$ meV. The value agrees well with the one deduced from the parity-nonconserving longitudinal asymmetry in the same resonance.

Published
2001
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4. A measurement of the absolute neutron beam polarization produced by an optically-pumped 3He spin filter

Author

Rich, D. R., Bowman, J. D., Crawford, B. E., Delheij, P. P. J., Espy, M. A., Haseyama, T., Jones, G., Keith, C. D., Knudson, J., Leuschner, M. B., Masaike, A., Masuda, Y., Matsuda, Y., Penttila, S. I., Pomeroy, V. R., Smith, D. A., Snow, W. M., Stephenson, S. L., Thompson, A. K., and Yuan, V.

Subjects
Physics - Instrumentation and Detectors
Abstract

The capability of performing accurate measurements of neutron beam polarization opens a number of exciting opportunities in fundamental neutron physics and in neutron scattering. At the LANSCE pulsed neutron source we have measured the neutron beam polarization with absolute accuracy of 0.3% in the neutron energy range from 40 meV to 10 eV using an optically-pumped polarized 3He spin filter and a relative transmission measurement technique. 3He was polarized using the Rb spin-exchange method. We describe the measurement technique, present our results, and discuss some of the systematic effects associated with the method., Comment: 35 pages, 11 figures, LaTeX format, submitted to Phys. Rev. A (1999)

Published
1999

5. Progress toward a new measurement of the parity violating asymmetry in n+p-->d+gamma

Author

Snow, W. M., Wilburn, W. S., Bowman, J. D., Leuschner, M. B., Penttila, S. I., Pomeroy, V. R., Rich, D. R., Sharapov, E. I., and Yuan, V.

Subjects
Nuclear Experiment
Abstract

We outline the motivation and conceptual design for a new experiment aimed at a 10-fold improvement in the accuracy of the parity-violating asymmetry A_gamma in the angular distribution of 2.2 MeV gamma rays from the n+p-->d+gamma reaction. This observable is primarily sensitive to the weak pion-nucleon coupling H_pi^1. A proof-of-principle experiment using unpolarized low-energy neutron capture on polyethylene and an array of 12 CsI detectors operated in current mode has been performed. Results of this test experiment including the current mode signal, electronic noise and detector sensitivity to magnetic fields are reported., Comment: 19 pages, 9 eps figures, uses RevTeX and epsfig, submitted to NIM

Published
1998
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7. Using the Barthel Index and modified Rankin Scale as Outcome Measures for Stroke Rehabilitation Trials; A Comparison of Minimum Sample Size Requirements

Author

McGill, Kris, primary, Sackley, Catherine, additional, Godwin, Jon, additional, Gavaghan, David, additional, Ali, Myzoon, additional, Ballester, Belen Rubio, additional, Brady, Marian C, additional, Brady, M.C, additional, Ali, M, additional, Ashburn, A, additional, Barer, D, additional, Barzel, A, additional, Bernhardt, J, additional, Bowen, A, additional, Drummond, A, additional, Edmans, J, additional, English, C, additional, Gladman, J, additional, Godecke, E, additional, Hiekkala, S, additional, Hoffman, T, additional, Kalra, L, additional, Kuys, S, additional, Langhorne, P, additional, Laska, A.C, additional, Lees, K, additional, Logan, P, additional, Machner, B, additional, Mead, G, additional, Morris, J, additional, Pandyan, A, additional, Pollock, A, additional, Pomeroy, V, additional, Rodgers, H, additional, Sackley, C, additional, Shaw, L, additional, Stott, D.J, additional, Sunnerhagen, K.S, additional, Tyson, S, additional, van Vliet, P, additional, Walker, M, additional, and Whiteley, W, additional

Published
2022
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11. How Well Do Standard Stroke Outcome Measures Reflect Quality of Life?: A Retrospective Analysis of Clinical Trial Data

Author

Ali, Myzoon, Fulton, Rachael, Quinn, Terry, Brady, Marian, Lees, K. R., Alexandrov, A., Bath, P. M., Bluhmki, E., Bornstein, N., Claesson, L., Davis, S. M., Donnan, G., Diener, H. C., Fisher, M., Gregson, B., Grotta, J., Hacke, W., Hennerici, M. G., Hommel, M., Kaste, M., Lyden, P., Marler, J., Muir, K., Sacco, R., Shuaib, A., Teal, P., Wahlgren, N. G., Warach, S., Weimar, C., Brady, M., Ali, M., Ashburn, A., Barer, D., Bernhardt, J., Bowen, A., Brodie, E., Corr, S., Drummond, A., Edmans, J., English, C., Gladman, J., Godecke, E., Hoffmann, T., Kalra, L., Kuys, S., Langhorne, P., Laska, A. C., Lees, K. R., Lincoln, N., Logan, P., Jongbloed, L., Mead, G., Pollock, A., Pomeroy, V., Rodgers, H., Sackley, C., Shaw, L., Stott, D. J., Sunnerhagen, K. S., Tyson, S., van Vliet, P., Walker, M., Whiteley, W., Warach, S., Albers, G., Davis, S., Donnan, G., Fisher, M., Furlan, T., Grotta, J., Hacke, W., Kidwell, C., Koroshetz, W., Lees, K. R., Lev, M., Liebeskind, D., Sorensen, G., Thijs, V., Thomalla, G., Wardlaw, J., Wintermark, M., Hanley, D. F., Gregson, B., Davis, S., Lees, K. R., Lyden, P., Muir, K., Steiner, T., Mayer, S., Wahlgren, N. G., Molina, C., Numminen, H., Lees, K. R., Tsivgoulis, G., Weimar, C., Diener, H. -C., Hankey, G., Lees, K. R., Ovbiagele, B., and Weir, C.

Published
2013
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30. Neurobiomechanical differences between successful and unsuccessful sit to stand movements performed by acute stroke patients

Author

Kerr, A., Clark, A., and Pomeroy, V.

Subjects
RM, RC0321
Abstract

The sit to stand (StS) movement is a frequently performed functional task that individuals with motor impairment can find difficult, threatening their ability to live independently [1]. Understanding the characteristics that differ between a successful and an unsuccessful StS attempt could enable a more targeted approach to rehabilitation.

Published
2018

31. A system for low field imaging of laser-polarized noble gas

Author

Wong, G. P, Tseng, C. H, Pomeroy, V. R, Mair, R. W, Hinton, D. P, Hoffmann, D, Stoner, R. E, Hersman, F. W, Cory, D. G, and Walsworth, R. L

Subjects
Life Sciences (General)
Abstract

We describe a device for performing MRI with laser-polarized noble gas at low magnetic fields (<50 G). The system is robust, portable, inexpensive, and provides gas-phase imaging resolution comparable to that of high field clinical instruments. At 20.6 G, we have imaged laser-polarized (3)He (Larmor frequency of 67 kHz) in both sealed glass cells and excised rat lungs, using approximately 0.1 G/cm gradients to achieve approximately 1 mm(2) resolution. In addition, we measured (3)He T(2)(*) times greater than 100 ms in excised rat lungs, which is roughly 20 times longer than typical values observed at high ( approximately 2 T) fields. We include a discussion of the practical considerations for working at low magnetic fields and conclude with evidence of radiation damping in this system. Copyright 1999 Academic Press.

Published
1999
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32. Low-field MRI of laser polarized noble gas

Author

Tseng, C. H, Wong, G. P, Pomeroy, V. R, Mair, R. W, Hinton, D. P, Hoffmann, D, Stoner, R. E, Hersman, F. W, Cory, D. G, and Walsworth, R. L

Subjects
Life Sciences (General)
Abstract

NMR images of laser polarized 3He gas were obtained at 21 G using a simple, homebuilt instrument. At such low fields magnetic resonance imaging (MRI) of thermally polarized samples (e.g., water) is not practical. Low-field noble gas MRI has novel scientific, engineering, and medical applications. Examples include portable systems for diagnosis of lung disease, as well as imaging of voids in porous media and within metallic systems.

Published
1998
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34. Medical Education

Author

Philp, I., Pomeroy, V., Gallagher, C., Adams, A., Griffiths, C., Marsh, F. P., Taylor, Ross J., Dewart, P. J., Elstein, Max, Plummer, Bill, Harvey, John, and Walker, James D.

Published
1993

35. From trial to practice Authors' reply

Author

Glasziou, P, Chalmers, I, Altman, DG, Bastian, H, Boutron, I, Brice, A, Jamtvedt, G, Farmer, A, Ghersi, D, Groves, T, Heneghan, C, Hill, S, Lewin, S, Michie, S, Perera, R, Pomeroy, V, Tilson, J, Shepperd, S, and Williams, JW

Published
2016
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37. Development, Expansion, and Use of a Stroke Clinical Trials Resource for Novel Exploratory Analyses

Author

Ali, Myzoon, Bath, Philip, Brady, Marian, Davis, Stephen, Diener, Hans Christoph, Donnan, Geoffrey, Fisher, Marc, Hacke, Werner, Hanley, Daniel F., Luby, Marie, Tsivgoulis, G., Wahlgren, Nils, Steven Warach, Steven, Lees, Kennedy R., Lees, K. R., Alexandrov, A., Bath, P. W., Bluhmki, E., Claesson, L., Davis, S. M., Gregson, B., Grotta, J., Hennerici, M. G., Hommel, M., Kaste, M., Lyden, P., Marler, J., Muir, K., Sacco, R., Shuaib, A., Teal, P., Wahlgren, N. G., Warach, S., Weimar, Christian, Ashburn, A., Barer, D., Bowen, A., Brodie, E., Corr, S., Drummond, A., Edmans, J., English, C., Gladman, J., Kalra, L., Langhorne, P., Lincoln, N., Logan, P., Mead, G., Patchick, E., Pollock, A., Pomeroy, V., Rodgers, H., Sackley, C., Shaw, L., Sunnerhagen, K. S., Tyson, S., Vliet, P. van, Whiteley, M., Albers, G., Furlan, T., Kidwell, C., Koroshetz, W., Lev, M., Sorensen, G., Wardlaw, J., Wintermark, M., Hanley, D. F., Steiner, T., Mayer, S., Molina, C., and Numminen, H.

Subjects
Diagnostic Imaging, medicine.medical_specialty, Databases, Factual, education, Medizin, MEDLINE, Physical medicine and rehabilitation, Resource (project management), medicine, Humans, Registries, cardiovascular diseases, Clinical care, Stroke, health care economics and organizations, Cerebral Hemorrhage, Clinical Trials as Topic, Data collection, business.industry, Communication, Data Collection, Stroke Rehabilitation, medicine.disease, Test (assessment), Clinical trial, Treatment Outcome, Neurology, Physical therapy, Registry data, business
Abstract

Introduction Analysis of reliable registry data can direct future research to influence clinical care. Data from the Virtual International Stroke Trials Archive have been used to test hypotheses and inform trial design. We sought to expand Virtual International Stroke Trials Archive into a broader stroke resource with new opportunities for research and international collaboration. Methods Using procedures initially developed for an acute stroke trial archive, we invited trialists to lodge data on rehabilitation, secondary prevention, intracerebral haemorrhage, imaging, and observational stroke studies. Results We have extended Virtual International Stroke Trials Archive into six subsections: Virtual International Stroke Trials Archive-Acute ( n = 28 190 patients’ data), Virtual International Stroke Trials Archive-Rehab ( n = 10 194), Virtual International Stroke Trials Archive-intracerebral haemorrhage ( n = 1829), Virtual International Stroke Trials Archive-Prevention, Virtual International Stroke Trials Archive-Imaging ( n = 1300), and Virtual International Stroke Trials Archive-Plus ( n = 6573). Enrollment continues, with commitments for the contribution of six further trials to Virtual International Stroke Trials Archive-Prevention, 13 trials to Virtual International Stroke Trials Archive-Rehab, and one registry to Virtual International Stroke Trials Archive-Plus. Data on age, type of stroke, medical history, outcomes by modified Rankin scale and Barthel Index (BI), mortality, and adverse events are available for analyses. The Virtual International Stroke Trials Archive network encourages the development of young investigators and provides opportunities for international peer review and collaboration. Conclusions Application of the original Virtual International Stroke Trials Archive concepts beyond acute stroke trials can extend the value of clinical research at low cost, without threatening commercial or intellectual property interests. This delivers valuable research output to inform the efficiency of future stroke research. We invite stroke researchers to participate actively in Virtual International Stroke Trials Archive and encourage the extension of Virtual International Stroke Trials Archive principles to other disease areas.

Published
2012
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40. Taking healthcare interventions from trial to practice

Author

Glasziou, P., primary, Chalmers, I., additional, Altman, D. G., additional, Bastian, H., additional, Boutron, I., additional, Brice, A., additional, Jamtvedt, G., additional, Farmer, A., additional, Ghersi, D., additional, Groves, T., additional, Heneghan, C., additional, Hill, S., additional, Lewin, S., additional, Michie, S., additional, Perera, R., additional, Pomeroy, V., additional, Tilson, J., additional, Shepperd, S., additional, and Williams, J. W., additional

Published
2010
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41. The feasibility of a kinematic measure of lip closure during meaningful speech.

Author

Carter, J A, Pomeroy, V M, Richards, Jim, Carter, J A, Pomeroy, V M, and Richards, Jim

Abstract

PURPOSE Assessment of dysarthria has traditionally been based on perceptual methods. The purpose of this study was to examine the feasibility of using 2D kinematic analysis to measure lip closure during normal speech. METHOD Retroflective markers (4 mm diameter) were placed on the midline of each lip of three healthy male, caucasian volunteers aged 69 years who repeated the sentence 'My mother made me an apple and blackberry pie' six times. Videorecordings were analysed using the Ariel Performance Analysis System to calculate the distance between the lips before, during and after the sentence. RESULTS The graphs produced from the data objectively measured the distance between the lips and identified the eight bilabial sounds. However, in spite of stringent study criteria to minimize differences linked to age, gender and race, differences were found between participants. CONCLUSION Kinematic 2D analysis may have potential for the objective measurement of lip closure in dysarthria in the context of meaningful speech. These results justify further pilot work to explore: the possible variability within defined populations; and the usefulness of 2D kinematic analysis in the measurement of disordered lip closure in dysarthria.

Published
2000

43. Neutron cross sections forHe3at epithermal energies

Author

Keith, C. D., primary, Chowdhuri, Z., additional, Rich, D. R., additional, Snow, W. M., additional, Bowman, J. D., additional, Penttilä, S. L., additional, Smith, D. A., additional, Leuschner, M. B., additional, Pomeroy, V. R., additional, Jones, G. L., additional, and Sharapov, E. I., additional

Published
2004
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47. Measurement of the parity violating asymmetry A[sub γ] in n⃗+p→d+γ

Author

Wilburn, W. S., primary, Bazhenov, A., additional, Blessinger, C. S., additional, Bowman, J. D., additional, Chupp, T. E., additional, Coulter, K. P., additional, Freedman, S. J., additional, Fujikawa, B. K., additional, Gentile, T. R., additional, Greene, G. L., additional, Hansen, G., additional, Hogan, G. E., additional, Ishimoto, S., additional, Jones, G. L., additional, Knudson, J. N., additional, Kolomenski, E., additional, Lamoreaux, S. K., additional, Leuschner, M. B., additional, Masaike, A., additional, Masuda, Y., additional, Matsuda, Y., additional, Morgan, G. L., additional, Morimoto, K., additional, Morris, C. L., additional, Nann, H., additional, Penttilä, S. I., additional, Pirozhkov, A., additional, Pomeroy, V. R., additional, Rich, D. R., additional, Serebrov, A., additional, Sharapov, E. I., additional, Smith, D. A., additional, Smith, T. B., additional, Snow, W. M., additional, Welsh, R. C., additional, Wietfeldt, F. E., additional, Yuan, V. W., additional, and Zerger, J., additional

Published
1999
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