• Requests for cancellations will be honored through October 15, 2021, and processed minus a $50 administrative fee. Cancellations must be sent in writing to After October 15, 2021, registration fees are non-refundable.

Photo Release

DFD will take photographs and video at the 74th Annual APS/DFD Meeting. By registering for the Meeting and its associated events, you agree to allow APS to use your photo and video footage in APS-related publications, materials, websites, or promotions.

Code of Conduct for APS Meetings

It is the policy of the American Physical Society (APS) that all participants, including attendees, vendors, APS staff, volunteers, and all other stakeholders at APS meetings will conduct themselves in a professional manner that is welcoming to all participants and free from any form of discrimination, harassment, or retaliation. Participants will treat each other with respect and consideration to create a collegial, inclusive, and professional environment at APS Meetings. Creating a supportive environment to enable scientific discourse at APS meetings is the responsibility of all participants.

Participants will avoid any inappropriate actions or statements based on individual characteristics such as age, race, ethnicity, sexual orientation, gender identity, gender expression, marital status, nationality, political affiliation, ability status, educational background, or any other characteristic protected by law.

Disruptive or harassing behavior of any kind will not be tolerated. Harassment includes but is not limited to inappropriate or intimidating behavior and language, unwelcome jokes or comments, unwanted touching or attention, offensive images, photography without permission, and stalking.

Violations of this code of conduct policy should be reported to meeting organizers, APS staff, or the APS Director of Meetings. Sanctions may range from a verbal warning to ejection from the Meeting without refund to notifying appropriate authorities. Retaliation for complaints of inappropriate conduct will not be tolerated. If a participant observes inappropriate comments or actions and personal intervention seems appropriate and safe, they should be considerate of all parties before intervening.

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Letter of Invitation

International registrants will automatically receive a letter of invitation at the time of registration.

  • If you need a letter before you register, please send an email to Please include LETTER OF INVITATION in the subject.

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