POPL 2025
Sun 19 - Sat 25 January 2025 Denver, Colorado, United States
POPL 2025 (series) /

Information for Presenters

By default, we will assume presenters will be in-person. If you need to present remotely, see instructions below.

For all presenters:

  • Your conference registration is mandatory. Remote presenters can make use of the virtual registration option.

  • We strongly recommend the use of a 16:9 aspect ratio for your slides.

  • You should pace your talk carefully; time is of the essence and the program schedule will be strictly enforced.

  • You can find the length of your talk in the program.

  • Subtract at least 5 minutes from the allotted time to account for questions and set-up.

  • Talk slots for the main POPL program are 20 minutes, so presenters should aim to give a 15 minute talk.

  • Talk slot lengths for workshops can be found on the respective workshop information pages.

In-Person Presenters

If you are presenting in-person, here are some things to keep in mind:

  • You should bring your own device to present your slides. Please ensure your slides are available offline / accessible from a different device in case of any technical issues.

  • Your presentation device should support HDMI input. If it does not, you are responsible for bringing the appropriate adapter.

  • Ensure your device is working and your slides are accessible during the break before your session starts, to avoid last minute difficulties.

  • Arrive at your session at least 10 minutes before it starts. Take time to familiarize yoursef with the room setup, make your presence known to the session chair, test out slides and audio, and address all issues with the student volunteer in the room.

Remote Presenters

If you plan to present remotely, please obtain approval from the organizers of your event, and inform the Video Chairs as early as possible. Please email conrad.watt@ntu.edu.sg and sigplan-av+popl25@googlegroups.com with the subject line [POPL 2025: Remote Talk] and include the talk name and event in the contents once you’ve cleared remote presentation with your event organizers.

Remote presenters will interact with session chairs and in-person participants over Discord call. This interaction includes both the talk and the live Q&A.

While we also support playing pre-recorded talks, we strongly encourage remote presenters to deliver their talk live over Discord, so that the talk and Q&A take place over the same medium.

If your talk is remote, it must have the Remote or Recorded badge in the program. Otherwise, please notify your event organizers to add it for you.

If you plan to use the virtual option, please notify the PC chair to get pre-approval from the organizing chairs of your track, and inform the video chairs as soon as possible.

Setting up Discord.

  1. Create a Discord account if you do not already have one. If you created a new account, please verify your email address.
  2. Check your email for a Discord server invitation link that will direct you to join the POPL 2025 Discord server.
  3. After joining the server, you should be prompted with a Customisation Question prompt.
    1. Select the Presenter role.
    2. Go to Channels and Roles located at the top-left of the server sidebar.
    3. Follow the Test Sessions, category.
  4. You now have access to all the required Presenter channels.

Live Remote Talk / Q&A-only

Please join the Standby LIVE Sessions voice channel at least 40 minutes before your presentation (see Test Session instructions below for more information). This also applies to Q&A-only presenters who have a pre-recorded talk. You will be alerted a few minutes before it is your time to present through Discord – make sure you have notifications turned on. Shortly after, you will be moved to your corresponding LIVE Session voice channel, in which you can turn your camera on and screen share to start your presentation once you can hear your session chair.

If you do not hear anyone, please do not disconnect from the voice channel. Wait for a message from the AV team or session chair on Discord/Email.

For Q&A-only presenters, you will still be moved to your corresponding LIVE Session voice channel while your pre-recorded video plays. You may mute yourself to prevent making noise over the video.

You can follow the live stream of current talks on the ACMSIGPLAN YouTube channel: https://youtube.com/@acmsigplan.

Test Sessions

To attend a remote test session, please join the Standby LIVE Session voice channel at least 60-40 minutes before your talk. An AV Team member will assist you in preparing for your presentation. Here are some of the key aspects we aim to test:

  • Microphone quality (you might have to turn off certain settings to sound clearer or louder).
  • Camera quality and/or angle.
  • Screensharing quality.
  • Internet connectivity.

If you cannot join for a test session the day of your talk, please make sure to email the AV Team with a proposed timeslot so we can proceed with the test. However, we encourage presenters to join for a test session shortly before their talk to prevent any setting changes between the test and the talk itself. During this session, The AV Team will also be assisting presenters with moving to the correct voice channel when it is time to give their talk, in which case we suggest that all presenters stay in the Standby LIVE Sessions channel until it is their time to present.

Pre-Recorded Remote Talks

Some presenters may opt to submit a pre-recorded talk to avoid technical difficulties (e.g., unreliable internet connection, poor video call quality) or overcome timezone differences.

Note that you will still be expected to participate in live Q&A over Discord after we play your pre-recorded talk, unless you have made other arrangements with your event organizers.

Here are some instructions for creating and submitting your pre-recorded talk:

  • Prepare your pre-recorded talk as a video recording.

    • There are various tools available to record your talk. The easiest way is to use Zoom: share your screen, unmute your microphone, and record your “meeting”. You can use tools like iMovie or ActivePresenter to edit your recording.

    • Make sure your video does not exceed your time limit. Your time limit is the duration of your time slot (as it appears in the program) shortened by at least 5 minutes, to allow for Q&A and switching to the next speaker.

    • Please submit an mp4 formatted video.

    • Your video file should be named according to the following schema: <EVENT_ACRONYM>-<SPEAKER_LASTNAME>-<TITLE_NO_SPACES>.mp4, e.g., PLMW-Gardner-WasmWowzie.mp4.

  • Upload your recorded talk to a cloud file-sharing service such as Google Drive. Do not share your video using YouTube or Vimeo.

  • Email the Video Chairs at sigplan-av+popl25@googlegroups.com and your event organizer with:

    1. a link to download your recorded talk;
    2. explicit consent allowing the video to be played at the conference; and
    3. (optionally) explicit consent allowing the video to be publicly streamed and uploaded to the SIGPLAN YouTube channel and releasing your rights of the video to ACM.

Please submit your video recording at least 3 days before the conference to avoid last-minute issues. You should receive an email from the Video Chairs to acknowledge receipt of your recording.