Search Results - "McDonald, F. B."

Voyager 1 Observes Low-Energy Galactic Cosmic Rays in a Region Depleted of Heliospheric Ions by Stone, E. C., Cummings, A. C., McDonald, F. B., Heikkila, B. C., Lal, N., Webber, W. R.

“…On 25 August 2012, Voyager 1 was at 122 astronomical units when the steady intensity of low-energy ions it had observed for the previous 6 years suddenly…”
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Voyager 1 Explores the Termination Shock Region and the Heliosheath beyond by Stone, E. C., Cummings, A. C., McDonald, F. B., Heikkila, B. C., Lal, N., Webber, W. R.

“…Voyager 1 crossed the termination shock of the supersonic flow of the solar wind on 16 December 2004 at a distance of 94.01 astronomical units from the Sun,…”
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Crossing the Termination Shock into the Heliosheath: Magnetic Fields by Burlaga, L. F, Ness, N. F, Acuña, M. H, Lepping, R. P, Connerney, J. E. P, Stone, E. C, McDonald, F. B

“…Magnetic fields measured by Voyager 1 show that the spacecraft crossed or was crossed by the termination shock on about 16 December 2004 at 94.0 astronomical…”
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A phenomenological study of the long-term cosmic ray modulation, 850–1958 AD by McCracken, K. G., McDonald, F. B., Beer, J., Raisbeck, G., Yiou, F.

“…The modulation of the galactic cosmic radiation over the past 1150 years is investigated using 10Be data from Greenland and the South Pole. For this purpose,…”
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Recent Voyager 1 data indicate that on 25 August 2012 at a distance of 121.7 AU from the Sun, sudden and unprecedented intensity changes were observed in anomalous and galactic cosmic rays by Webber, W. R., McDonald, F. B.

“…At the Voyager 1 (V1) spacecraft in the outer heliosphere, the intensities of both anomalous cosmic rays and galactic cosmic rays (GCRs) changed suddenly and…”
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Sudden intensity increases and radial gradient changes of cosmic ray MeV electrons and protons observed at Voyager 1 beyond 111 AU in the heliosheath by Webber, W. R., McDonald, F. B., Cummings, A. C., Stone, E. C., Heikkila, B., Lal, N.

“…Voyager 1 has entered regions of different propagation conditions for energetic cosmic rays in the outer heliosheath at a distance of about 111 AU from the…”
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Characterisation of excipient-free nanoporous microparticles (NPMPs) of bendroflumethiazide by Healy, A.M., McDonald, B.F., Tajber, L., Corrigan, O.I.

“…The purpose of this study was to prepare excipient-free porous microparticles of bendroflumethiazide by spray drying and to characterise the physicochemical…”
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Observations of the Heliosheath and Solar Wind Near the Termination Shock by Voyager 2 by Burlaga, L. F, Ness, N. F, Acuña, M. H, Richardson, J. D, Stone, E, McDonald, F. B

“…This paper describes the principal features of 24 hr averages of the magnetic field strength variations B(t) and their relationships to the plasma and…”
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Galactic cosmic ray H and He nuclei energy spectra measured by Voyagers 1 and 2 near the heliospheric termination shock in positive and negative solar magnetic polarity cycles by Webber, W. R., Cummings, A. C., McDonald, F. B., Stone, E. C., Heikkila, B., Lal, N.

“…Using data from the Voyager 1 and 2 spacecraft, we have followed the intensity variations of H, He and C + O nuclei between 1998 and 2008 and determined the…”
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The β2-adrenoceptor agonist terbutaline recovers rat pharyngeal dilator muscle force decline during severe hypoxia by McDonald, FB, Skelly, JR, O'Halloran, KD

“…Rationale Obstructive sleep apnoea syndrome (OSAS) is a debilitating condition characterized by recurrent occlusions of the pharyngeal airway during sleep…”
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Galactic cosmic ray modulation: Effects of the solar wind termination shock and the heliosheath by Caballero-Lopez, R. A., Moraal, H., McDonald, F. B.

“…This paper studies the radial intensity profiles of galactic cosmic ray protons (H) and α particles (He) during the solar minimum periods of 1987 (the…”
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Transient intensity changes of cosmic rays beyond the heliospheric termination shock as observed at Voyager 1 by Webber, W. R., Cummings, A. C., McDonald, F. B., Stone, E. C., Heikkila, B., Lal, N.

“…This paper continues our studies of temporal variations of cosmic rays beyond the heliospheric termination shock (HTS) using Voyager 1 (V1) data when V1 was…”
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A ∼1.7-year quasi-periodicity in cosmic ray intensity variation observed in the outer heliosphere by Kato, C., Munakata, K., Yasue, S., Inoue, K., McDonald, F. B.

“…The wavelet transform technique has been applied to investigate the periodicities longer than a year in cosmic ray intensity variations observed at the Voyager…”
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Passage of a large interplanetary shock from the inner heliosphere to the heliospheric termination shock and beyond: Its effects on cosmic rays at Voyagers 1 and 2 by Webber, W. R., Cummings, A. C., McDonald, F. B., Stone, E. C., Heikkila, B., Lal, N.

“…Using data from the charged particle telescopes on V1 and V2 we have followed the progress of a large interplanetary shock as it passes V2 at a distance of 79…”
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Search for the heliosheath with Voyager 1 magnetic field measurements by Burlaga, L. F., Ness, N. F., Stone, E. C., McDonald, F. B., Acuña, M. H., Lepping, R. P., Connerney, J. E. P.

“…The magnetic field measured by Voyager 1 (V1) near 85 AU from 2002.0 to 2003.17 has the expected properties for the heliospheric magnetic field at that…”
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Anomalous cosmic rays in the distant heliosphere and the reversal of the Sun's magnetic polarity in Cycle 23 by McDonald, F. B., Stone, E. C., Cummings, A. C., Webber, W. R., Heikkila, B. C., Lal, N.

“…Beginning in early June 2001 and extending over a ∼3 month period the Cosmic Ray Subsystem (CRS) experiment on Voyager 1 (80.3 AU, 34°N) observed a rapid…”
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Relation between the solar wind dynamic pressure at Voyager 2 and the energetic particle events at Voyager 1 by Richardson, J. D., McDonald, F. B., Stone, E. C., Wang, C., Ashmall, J.

“…Starting in 2001, Voyager 1 observed three events characterized by enhanced fluxes of energetic particles. These events suggest that Voyager 1 made a close…”
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The disappearance of anomalous protons at Voyager 1 and Voyager 2 in the outer heliosphere between 1998 and 2002 by Webber, W. R., McDonald, F. B., Cummings, A. C., Stone, E. C., Heikkila, B., Lal, N.

“…In 1998 and 1999 at V1 and V2 in the outer heliosphere between 55 and 75 AU, large intensities of anomalous H were observed with a peak in the differential…”
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The relative recovery of galactic and anomalous cosmic rays in the distant heliosphere: Evidence for modulation in the heliosheath by McDonald, F. B., Heikkila, B., Lal, N., Stone, E. C.

“…At Voyager 1 (46 AU, 33°N) the recovery of anomalous cosmic rays (ACR) is found to be very different from that of galactic cosmic rays (GCR) following the…”
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Ulysses Cosmic Ray and Solar Particle Investigation/Kiel Electron Telescope observations: Charge sign dependence and spatial gradients during the 1990–2000 A > 0 solar magnetic cycle by Heber, B., Wibberenz, G., Potgieter, M. S., Burger, R. A., Ferreira, S. E. S., Müller-Mellon, R., Kunow, H., Ferrando, P., Raviart, A., Paizis, C., Lopate, C., McDonald, F. B., Cane, H. V.

“…Ulysses, launched in October 1990, began its second out‐of‐ecliptic orbit in September 1997. From 1991 to mid‐2000, solar polar magnetic field observations…”
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