Invited talks since 1998:
- "Outbursts from Supermassive Black Holes in Clusters of Galaxies and the Problem of Galaxy Formation," Physics Department Colloquium, University of Wisconsin, Milwaukee, Sept. 23, 2005
- "AGN Feedback in Galaxy Clusters" University of Kentucky, Dept. of Physics & Astronomy, Astrophysics Seminar, Sept. 9, 2005
- "Outbursts from Supermassive Black Holes in Clusters of Galaxies and the Problem of Galaxy Formation," University of Kentucky, Dept. of Physics & Astronomy Colloquium, Sept. 8, 2005
- "Observations of ICM/Active Galaxy Interaction" presented at "The Future of Cosmology with Clusters of Galaxies," 27 February to 2 March 2005, Kona, Hawaii
- ``Cavities, Supercavities, & Shocks in Galaxy Clusters'' Seminar, Department of Physics & Astronomy, Michigan State University, Feb. 9, 2005
- ``Cavities and Supercavities in the Hot Gas in Galaxy Clusters'' University of Kentucky Dept. of Physics & Astronomy Colloquium, March 25, 2005
- ``AGN Heating of the Hot Gas in Galaxy Clusters'' Massachusetts Institute of Tech- nology, Astrophysics Colloquium, Apr. 5, 2005
- ``AGN Heating of the Hot Gas in Galaxy Clusters'' University of Colorado Dept. of Astrophysical and Planetary Sciences Colloquium, Apr. 25, 2005
- ``Outflows from Supermassive Black Holes in Galaxy Clusters'' Department of Physics & Astronomy, Ohio University, October 21, 2004
- ``Magnetic Bubbles & Radio Sources in Clusters of Galaxies,'' Los Alamos National Laboratory, T-6 division seminar, Los Alamos, NM, December 16, 2003
- ``Star Formation in Cluster Cooling Flows,'' (Review) ``The Riddle of Cooling Flows in Galaxies and Clusters of Galaxies'', Charlottesville, VA May 31-June 4, 2003
- ``X-ray Structure in Galaxy Clusters,'' (Review) ``The First Constellation-X Spectroscopy Workshop,'' May 4--7, 2003, Columbia University, New York, NY
- ``A New View of Cooling Flows in Galaxy Clusters,'' Department of Astronomy, Columbia University, April 7, 2003
- ``A New View of Cooling Flows in Galaxy Clusters,'' Department of Physics & Astronomy, Rutgers University, April 4, 2003
- ``Magnetic Bubbles in Galaxy Clusters,'' Dept. of Physics & Astronomy, Ohio University, Athens, Oct. 17, 2002
- ``Magnetic Bubbles in Galaxy Clusters,'' Dept. of Physics, Miami University, Miami, OH, Sept. 25, 2002
- ``Cooling Flows Unveiled: A Crisp X-ray View of Galaxy Cluster Cores,'' Lawrence Livermore National Laboratory, Livermore, CA, Sept. 6, 2002
- ``Cooling Flows Unveiled: A Crisp X-ray View of Galaxy Cluster Cores,'' Dept. of Astronomy, University of California, Berkeley, Sept. 5, 2002
- ``Cooling Flows in the Chandra Era,'' National Optical Astronomy Observatories and the Department of Astronomy, University of Arizona, Tucson, AZ, April 18, 2002
- ``Cooling Flows in the Chandra Era,'' University of Virginia, Department of Astronomy, Charlottesville, VA, March 4, 2002
- ``X-ray Cavities and Feedback in Cluster Cooling Flows,'' Case Western Reserve University, Cleveland, OH, Jan. 16, 2002
- ``Galaxy Clusters With Chandra,'' Dec. 18, 2001, Los Alamos National Laboratory, Los Alamos, NM
- ``X-ray Cavities & Feedback in Cluster Cooling Flows,'' Dec. 12, 2001, Dept. of Physics, Carnegie Mellon University, Pittsburgh, PA
- ``X-ray Cavities & Feedback in Cluster Cooling Flows,'' Nov. 30, 2001, Danish Space Research Institute, Copenhagen, DK
- ``Chandra Imaging of Cluster Cores Harboring Powerful Radio Galaxies,'' Sept. 21, 2001, National Radio Astronomy Observatory, Green Bank, WV
- ``X-ray Cavities Associated With Radio Emission in Clusters,'' CMBNet Ringberg Workshop, Galaxy Clusters as CMB Foregrounds & Workshop on Relativistic Jets Munich, Germany, Sept. 3--6, 2001
- ``Clusters of Galaxies in Sharp Focus: The Structure of Clusters as Revealed by Chandra,'' The High Energy Universe at Sharp Focus: A Symposium of Chandra Science, St. Paul, MN July 15--18, 2001
- ``Radio--X-ray Interactions and Star Formation in Cluster Cooling Flows,'' Los Alamos National Laboratory, Los Alamos, NM, May 3, 2001
- ``Cluster Cooling Flows in the Chandra Era,'' Feb. 15, 2001, Astronomy Department, The Ohio State University
- ``Star Formation Histories of Cluster Cooling Flows'' March 2000, Harvard-Smithsonian Center for Astrophysics
- ``Star Formation Histories of Cluster Cooling Flows'' February 2000, Department of Physics & Astronomy, University of Delaware, Newark, DE.
- ``Star Formation Histories of Cluster Cooling Flows'' January 2000, Department of Physics & Astronomy, Ohio University, Athens, OH.
- ``Distant Clusters of Galaxies'' March 3, 1999, Adler Planetarium and the University of Chicago
- ``Properties of Distant X-ray Clusters'' October, 1998, Astronomy Department, Boston University
- ``Evolution of Cluster Cooling Flows'' May 1998, Laboratory for High Energy Astrophysics, Goddard Space Flight Center
