Add keynote speaker photos and bios

Matthias's bio is taken from his ASU profile (https://search.asu.edu/profile/3160407); using this bio is pending his approval.

Author: jennaswa

pages/ugm2025.md

@@ -49,7 +49,41 @@ Bursary recipients will be notified by July 30, 2025.
 
 ## Keynote Speakers
 
-Keynote speakers will be announced soon.
+### Dr. Lillian Chong
+
+<img
+src="/public/images/UGM2025photo_Chong.png"
+title="Dr. Lillian Chong" alt="Dr. Lillian Chong"
+style="float: left; width: 220px; height: 220px; border-radius: 20px; border: 15px solid white" />
+
+Lillian Chong is a Professor in the Department of Chemistry at the University of Pittsburgh. Her research focuses on developing and applying
+advanced simulation methods to investigate rare but biologically important events, with an emphasis on capturing rigorous kinetics. Her group
+leads the development of the open-source WESTPA software, which implements weighted ensemble path sampling strategies for efficient simulations
+of rare events. She also works on the development of implicitly polarized force fields and rational design of protein conformational switches.
+Prof. Chong received a B.S. in Chemistry at MIT and a Ph.D. in Biophysics from UCSF, under the mentorship of Peter Kollman. She then completed
+postdoctoral training with Vijay Pande at Stanford University and Bill Swope at the IBM Almaden Research Center. Her honors include the Gordon
+Bell Special Prize for COVID-19 Research and an NSF CAREER Award.
+
+### Dr. Matthias Heyden
+
+<img
+src="/public/images/UGM2025photo_Heyden.jpg"
+title="Dr. Matthias Heyden" alt="Dr. Matthias Heyden"
+style="float: left; width: 220px; height: 220px; border-radius: 20px; border: 15px solid white" />
+
+Matthias Heyden joined Arizona State University's School of Molecular Sciences in 2017. Prior appointments include a research group leader
+position at the Max-Planck-Institut für Kohlenforschung and the Cluster of Excellence RESOLV, and as a postdoctoral researcher at the University
+of California, Irvine. 
+
+His group uses computer simulations to gain atomistic insights into molecular systems. A main focus of this work is to understand the process of
+solvation of small solutes (ions, alcohols and metabolites) up to large biopolymers (proteins and nucleic acids). Another avenue of his research
+is in the analysis of correlated vibrational motion in biomolecular liquids, which provide rich information on the propagation of energy and local
+density fluctuations within the system (i.e. sound propagation). These simulations can be compared to coherent scattering experiments with neutrons
+or x-rays, but the computer models allow further to isolate the correlations between specific components of the system and to follow time- and space
+correlations of atomic vibrations with spatial resolution. This provides entirely new insights into the dynamic coupling of low-frequency intermolecular
+vibrations in liquids and between biomolecules and their surrounding solvent. In addition, the Heyden lab develops novel methods to simulate biomolecular
+solutions on a large scale including 100s to 1000s of flexible proteins or polymers. These approaches provide insights into the complex interactions
+between biomolecules in realistic, crowded environments resembling the interior of living cells.
 
 ## Program