Flux tube sizes.
Presented at the AGU Chapman Conference on the Physics of Magnetic
Flux Tubes. Hamilton , Bermuda , 27-31 March 1989.
Acoustic spectroscopy of solar magnetic flux concentrations.
Presented at the Mini-Workshop on Flux Tubes in the Solar Atmosphere.
Oslo , Norway , 19-21 June 1989.
Particle acceleration in spherical accretion flows.
Presented at the Mini-Workshop on Particle Acceleration, Garching-bei-München.
Germany , 24-29 September 1989.
Flux tube sizes and temporal evolution. Presented
at the Orbiting Solar Laboratory Workshop on Electromechanical
Coupling of the Solar Atmosphere. Capri , Italy , 27-31 May 1991.
Flux tube sizes. Presented at XXI International
Astronomical Union General Assembly. Buenos Aires , Argentina
, 23 July- 1 August 1991 .
Sunspot seismology: The interaction of p -modes
with a sunspot. Presented at the NATO Advanced Study Workshop
on the Theory of Sunspot. Cambridge , United Kingdom , 22-27 September
Coupled wave damping and stochastic Fermi acceleration
of interstellar pickup ions. Presented at the Conference on Particle
Acceleration in Cosmic Plasmas. Newark , Delaware , 4-6 December
Sunspot seismology: Using acoustic waves to probe
sunspots. Presented at the 50 th Anniversary of the Kiepenheuer
Institut für Sonnenphysik Meeting. Freiburg , Germany , June
Active region seismology. Presented at the 4 th
SOHO Workshop: Helioseismology. Pacific Grove , California , April
Dynamic phenomena in sunspots observed by the HAO/NSO
Advanced Stokes Polarimeter. Presented at the Meeting on Nonlinear
Dynamics of the Sun. Ortisei/St. Ulrich, Italy , 10-11 July 1997.
Sunspot structure and wave dynamics. Presented at
the 9 th SOHO Workshop on Helioseismic Diagnostics of Solar Convection
and Activity. Stanford , California , 12-15 July 1999.
Magnetic fields and helioseismology. Presented at
the 33 rd COSPAR General Assembly. Warsaw , Poland , 16-22 July
Wave propagation through a magnetized solar atmosphere.
Presented at the 2 nd Solar-B Science Meeting. Tokyo , Japan ,
4-6 December 2000.
Donald Menzel and the founding of the High Altitude
Observatory. Presented at the Menzel Centennial Symposium. Cambridge
, Massachusetts , 15 May 2001.
Waves in sunspots and starspots. Presented at the
1 st Potsdam Thinkshop on Sunspots and Starspots. Potsdam , Germany
, 6-10 May 2002.
Meeting summary. Presented at the 34 th COSPAR General
Assembly. Houston , Texas , 10-19 October 2002.
What does the size distribution of sunspots tell
us about their origins. Presented at the meeting Mathematics for
Applications. Oslo , Norway , 1-2 September 2003.
The development of the western hemisphere's first
coronagraph. Presented at the Kolloquium des Arbeitskreises Astronomiegeschichte,
Entwicklung der Sonnenforschung. Freiburg , Germany , 15 September
The High Altitude Observatory and the foundation
of the Sommers-Bausch Observatory. Presented at 50 Years of Sommers-Bausch
Observatory. Boulder , Colorado , 15 November 2003 .
The best of times, the worst of times. Presented
at the SORCE Science Meeting, Physical Processes Linking Solar
Radiation and Solar Variability With Global Climate Change. Sonoma
, California , 4-7 December 2003.
Historical anecdotes on living with this star. Presented
at the Living With a Star Workshop, "Connecting our Dynamic
Sun to the Heliosphere and Geospace". Boulder , Colorado
, 23-26 March, 2004.
Historical anecdotes on solar variability and terrestrial
impacts. Presented at Solar Climate Workshop, Laurel , Maryland
, 26-27 April, 2004.
on Solar Variability & Climate Change