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Week of April 26, 2026

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Sunday, April 26th, 2026
11:00am – 1:00pm
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World Tai Chi Day Celebration

Hameetman Center 220 - Multipurpose Room
2:30pm – 4:00pm
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Three Sisters

Ramo Auditorium
Monday, April 27th, 2026
11:00am – 12:00pm
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PhD Thesis Seminar

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Expanding molecular designs for mechanochromic polymers
Yan Sun, Graduate Student, Chemistry, Caltech,
12:00pm – 1:15pm
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Inclusive Leadership 101

Online Event
3:30pm – 4:30pm
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PhD Thesis Defense

Gates Annex B122
Enantioselective Reactions of Palladium Enolates and Progress Toward Mitomycin B
,
Christian Strong, Graduate Student, Chemistry (Stoltz Group), Caltech,
3:45pm – 4:45pm
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Inorganic-Electrochemistry Seminar

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Real-time electrocatalytic control of C-H and C-C bond transformation and fuel formation
Marcel Shreier, University of Wisconsin, Madison,
4:00pm – 5:00pm
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Astronomy Tea Talk

Cahill 370
Calibrating Galaxy Formation Models for the Roman Era
Andrew Robertson, Postdoc at Carnegie Observatories,
4:00pm – 4:30pm
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CPA Wellbeing - Practical Tools to Deal with Stress

Chen 130
4:00pm – 5:00pm
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Geological and Planetary Sciences Seminar

Arms 155 (Robert P. Sharp Lecture Hall)
"A global discrepancy in atmospheric humidity trends between models and observations"
Isla Simpson, Scientist 3, Section CAS Head, Climate and Global Dynamics Laboratory, University Corporation of Atmospheric  Research,
4:00pm – 5:00pm
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H.B. Keller Colloquium

Annenberg 105
Mathematics of Cryo-Electron Microscopy
Amit Singer, Professor, Department of Mathematics, Princeton University,
,
4:00pm – 5:00pm
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High Energy Physics Seminar

Online and In-Person Event
Global Structure of Symmetries in Particle Physics
Seth Koren, University of Notre Dame,
4:00pm – 5:00pm
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Quantum Matter Seminar

East Bridge 114
Thermalization and chaos in many-body quantum and classical dynamical systems of algebraic origin
Anton N. Kapustin, Professor of Theoretical Physics and Mathematics, Department of Physics, California Institute of Technology,
7:30pm – 9:30pm
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Astronomy on Tap

"NASA Artemis" & "Lunar Landers"
Sarah Elizabeth McCandless, Navigation Engineer, NASA JPL,
Roshan Misra, Mechanical Engineering Lead, Honeybee Robotics,
Tuesday, April 28th, 2026
10:30am – 12:00pm
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Laser Safety Training

Online Event
12:00pm – 1:00pm
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Hidden/Invisible Disabilities Affinity Space

Hameetman Center 220 - Multipurpose Room
12:00pm – 1:00pm
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Math Graduate Student Seminar

Linde Hall 255
A Hopf algebra on nonplanar binary forests
Elizabeth xiao, Graduate Student, Department of Mathematics, Caltech (California Institute of Technology),
12:00pm – 1:00pm
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NB-CNS Seminar - Daniel Mucida

Broad 100
Daniel Mucida, Professor Investigator, Howard Hughes Medical Institute, Immunology, Virology, and Microbiology, The Rockefeller University,
12:15pm – 1:00pm
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Fellowships Advising Information Sessions - Marshall / Churchill

2:00pm – 3:00pm
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X-Ray Safety Training

Online Event
4:00pm – 5:00pm
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DIX Planetary Science Seminar

South Mudd 365
"How is the Neptune Desert Populated? Insights from 21 Newly Validated Exoplanets" & "A First Look at the 3-12 µm Spectrum of the Bare-rock Exoplanet LHS 3844 b"
Jonathan Gomez Barrientos & Kimberly Paragas, Graduate Student, Division of Geological and Planetary Sciences, Caltech,
4:00pm – 5:00pm
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Marcus Center Special Seminar

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Real-time simulations of ultrafast electron relaxation dynamics
Joshua S. Kretchmer, Assistant Professor, School of Chemistry & Biochemistry, Georgia Institute of Technology,
4:00pm – 5:00pm
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Ulric B. and Evelyn L. Bray Social Sciences Seminar

Baxter B125
The Donor Dilemma
B. Pablo Montagnes, Associate Professor of Data & Decision Sciences and Political Science, Emory University,
4:15pm – 5:15pm
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QCSA Speaker Event: John Preskill @ Caltech

Lauritsen 269
John Preskill, Professor, Caltech,
5:30pm – 7:15pm
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Armenian Music Lecture and Dinner | Komitas and the Echo of a Vanished World

Dabney Hall, Lounge
Dr. Vatché Mankerian,
7:00pm – 9:00pm
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Caltech Tai Chi Club - Free Tai Chi Class

Hameetman Center 220 - Multipurpose Room
Wednesday, April 29th, 2026
8:00am – Ongoing
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Midterm Examination Period

10:00am – 11:00am
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Consciousness & Reality (C&R) 2025-26 Series NEUROBIOLOGICAL ORIGINS OF VISUAL AWARENESS

10:00am – 11:00am
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Deans & Donuts - Spring Midterm Study Break

Center for Student Services, Lobby
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Water-Wave Scattering Amplitudes and the Waterhedron
Francesco Calisto, Caltech,
12:00pm – 2:00pm
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Caltech Giving Day: Give Back. Get Involved. Make an Impact.

Hameetman Center Patio
12:00pm – 1:00pm
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Logic Seminar

Online Event
The Borel dichromatic number
Tonatiuh Matos Wiederhold, PhD Candidate, Department of Mathematics, University of Toronto,
12:00pm – 1:00pm
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Seismo Lab Brown Bag Seminar

South Mudd 254
Monica Kohler, Research Professor of Mechanical and Civil Engineering, Caltech,
12:00pm – 2:00pm
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Weekly Composting Tabling Event

Red Door Cafe
4:00pm – 5:00pm
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Astronomy Colloquium

Cahill, Hameetman Auditorium
A paradigm shift in the landscape of Type Ia supernova progenitors
Ken Shen, Research Specialist, Department of Astronomy, UC Berkeley,
4:00pm – 5:00pm
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Environmental Science and Engineering Seminar

South Mudd 365
Thermodynamic Control of Hydroclimate Change in the Western United States and Its Consequences
Alex Hall, Director, Institute of the Environment and Sustainability; Professor, Atmospheric and Oceanic Sciences; Faculty Director, Sustainable LA Grand Challenge Institute of the Environment and Sustainability, UCLA,
4:00pm – 5:00pm
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Materials Science Research Lecture

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Probing Nanoscale Structures and Magnetism: An Introduction to Small-Angle Neutron Scattering (SANS)
Lisa Debeer-Schmitt, PhD, Senior R&D, Neutron Sciences Directorate, Oak Ridge National Laboratory,
4:00pm – 5:00pm
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Organic Chemistry Seminar

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Design and Application of New Pericyclic Strategies
Christopher Newton, Assistant Professor, Department of Chemistry, University of Georgia,
7:30pm – 8:30pm
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POSTPONED: Watson Lecture - Sarkis Mazmanian

Beckman Auditorium
Sarkis Mazmanian, Luis B. and Nelly Soux professor of microbiology; Merkin Institute Professor,
Thursday, April 30th, 2026
10:00am – 11:00am
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PhD Thesis Defense

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Principles of Proton-coupled Electron Transfer Mediator Design
Enric Adillon, Graduate Student, Chemistry (Peters Group), Caltech,
11:00am – 12:00pm
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Mechanical and Civil Engineering Seminar

Gates-Thomas 135
Robots That Learn To Model The World By Playing
Anirudha Majumdar, Associate Professor, Mechanical and Aerospace Engineering (MAE) department, Princeton University,
12:00pm – 2:00pm
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Midterms Decompression: Tie-Dye Afternoon

Center for Student Services, Large Tent
12:05pm – 1:00pm
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Observational Cosmology Seminar

Cahill 370
Precision Redshifts for SPHEREx Cosmology
Gemma Huai, Graduate student, Division of Physics, Mathematics and Astronomy, Caltech,
2:30pm – 3:30pm
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Caltech/USC Joint Algebra and Geometry Seminar (1/2)

Linde Hall 187
TBD
Dan Kaplan, Assistant Professor, Department of Mathematics, Long Beach State,
4:00pm – 5:00pm
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Caltech/USC Joint Algebra and Geometry Seminar (2/2)

Linde Hall 187
Tensor-generation on toric varieties
Daigo Ito, PhD Candidate, Department of Mathematics, UC Berkeley,
4:00pm – 5:00pm
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Chemistry Seminar

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Finding Chemical Insight in the Maze of Mass Spectra with Machine Learning
Daniil Boiko, Ph.D., Co-Founder, onepot.AI,
4:00pm – 5:00pm
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Number Theory Seminar

Linde Hall 387
A new proof of the Arithmetic Siegel--Weil formula
Yu Luo, PhD Candidate, Department of Mathematics, University of Wisconsin-Madison,
4:00pm – 5:00pm
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Physics Colloquium

Online and In-Person Event
Optical atomic clocks in the age of quantum information processing
Nelson Darkwah Oppong, Assistant Professor of Physics, PMA, Caltech,
4:00pm – 5:00pm
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Social Sciences History Seminar

Baxter B125
Immigrants' Wages, Integration and New Arrivals - Evidence from the Quota Acts of 1921 and 1924
Katherine Eriksson, Associate Professor, Department of Economics, UC Davis,
Friday, May 1st, 2026
11:00am – 12:00pm
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High Energy Theory Seminar

Online and In-Person Event
Imaginary Liouville theory
Gaston Giribet, New York University,
12:00pm – 1:00pm
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► CANCELED: Center for Social Information Sciences (CSIS) Seminar

Baxter 125
This seminar has been canceled.
Lauren Conger, Graduate Student, Department of Control & Dynamical Systems, Caltech,
12:00pm – 1:00pm
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Arab Heritage Month: Seminar

Decolonized Futures: Indigenous Visions
Dr. Nour Joudah, Asst. Professor, Deparment of Asian American Studies, UCLA,
1:30pm – 2:30pm
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PhD Thesis Defense

Noyes 153 (J. Holmes Sturdivant Lecture Hall)
Template-Free Assembly of Three-Dimensional Mesostructures via Polarization Control
Natasha Reich, Graduate Student, Chemistry (Lewis Group), Caltech,
2:00pm – 3:00pm
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Geometry and Topology Seminar (1/2)

Linde Hall 310
A Steenrod Square for Knot Floer homology
Yan Tao, PhD Candidate, Department of Mathematics, UCLA,
2:00pm – 3:00pm
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IQIM Postdoctoral and Graduate Student Seminar

East Bridge 114
Non-Abelian Quantum Low Depth Parity Check Codes
Maine Christos, AWS Quantum Postdoctoral Scholar,
2:00pm – 3:00pm
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TAPIR Seminar

Online and In-Person Event
EDGE: Constraining dark matter with the smallest dwarf galaxies
Stacy Kim, Nashman/CTAC Postdoctoral Fellow, Carnegie Observatories,
3:00pm – 4:00pm
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Geometry and Topology Seminar (2/2)

Linde Hall 310
Orientations in Real Heegaard-Floer theory
Ciprian Bonciocat, Graduate Student, Department of Mathematics, Stanford,
3:00pm – 4:00pm
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PhD Thesis Defense

Broad 100
Characterizing the lipid II flippase MurJ as an antibiotic target
Yancheng Evelyn Li, Graduate Student, Biochemistry & Molecular Biophysics, California Institute of Technology,
3:00pm – 4:00pm
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Susan and James Wu Aerospace Colloquium

Guggenheim 133 (Lees-Kubota Lecture Hall)
Hypervelocity Water Entry and Free Flight Experiments
Bryan Schmidt, Assistant Professor, Mechanical & Aerospace Engineering, Case Western Reserve University,
4:00pm – 5:00pm
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Inorganic-Organometallics Seminar

Noyes 147 (J. Holmes Sturdivant Lecture Hall)
Mixed valent iron in a lithium-rich metal sulfide and the effects of metal-deficiency on electrochemical anion redox
Colin Morrell, Graduate Student (See Research Group), Department of Chemistry, Caltech,
4:00pm – 5:00pm
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Seismo Lab Seminar

South Mudd 254
Long-Reach Distributed Fiber-Optic Sensing over Repeated Submarine Cables
Mikael Mazur, Member of Technical Staff, Nokia Bell Labs,
5:45pm – 8:00pm
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Mega Shabbat

Chabad at Caltech, 430 S. Hill Ave.
7:00pm – 9:00pm
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Caltech Tai Chi Club - Free Tai Chi Class

Hameetman Center 220 - Multipurpose Room
7:30pm – 10:30pm
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A Midsummer Night's Dream

Ramo Auditorium
Saturday, May 2nd, 2026
7:30pm – 10:30pm
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A Midsummer Night's Dream

Ramo Auditorium