What defines a correct program? What education makes a good programmer? The answer depends on what culture of programming you subscribe to!
This has been a long time in the making, but my open access book on the history of programming is available for pre-order!
www.cambridge.org/core/books/c...
No, sorry. Also, it'll be in Danish.
Happy to catch up on a call sometime soon if you want though! Then I can share some of the things we've been working on.
Hah, this is genuinely bonkers.
Just now, I was adding screenshots of tldraw comp to a presentation about AI in teaching for highschool teachers. I use it as example of a Hypercard-like future where teachers may be able to make their own interactive teaching material. I should show fairies too.
Software Substrates Workshop. Submission deadline Feb 20
2026.programming-conference.org/home/substra...
Marcel in a blue hoodie and Pete in a striped sweater getting ready to present DashSpace at IEEE VIS 2025 in Vienna.
Marcel in a blue hoodie at the podium presenting DashSpace: the slide shows the paper title: โDashSpace: A Live Collaborative Platform for Immersive and Ubiquitous Analyticsโ.
Weโre very pleased to present DashSpace, a web-first live and collaborative platform for immersive analytics using WebXR: github.com/Webstrates/D...
Here is @maski89.bsky.social ready to give the talk at #ieeevis 2025 and @pwsbutcher.bsky.social on deck for a demo.
PDF: pure.au.dk/ws/portalfil...
Screenshot of The Matrix State of the Union stram showing a powerpoint with the text: The Future - We're going to continue to laser-focus on being the best decentralized secure comms platform in the world. - That means we're not going to purse decentralized social - good luck to ATproto, ActivityPub, Nostr etc. - It means we're not going to pursue free-style decentralized data replication - good luck to Automerge, Beehive, Local-First etc. - It means we're not going to build other Matrix showcases (e.g. Thirdroom) - Instead, we are going to continue focusing everything on building a safe, global, resilient, secure communication network which can be used to build decentralized alternatives to WhatsApp, Signal, Telegram, Teams, Slack, Discord and friends.
Screenshot of The Matrix State of the Union video showing a powerpoint with white background and black text that reads: In practice, this means: - Finish Hydra. - Fix client-controlled cryptographic group membership (either by MLS, DMLS, or client-side state resolution. - Improve metadata posture (Pseudo IDs, encrypted state events, maybe leveraging MLS) - Improving Trust & Safety - Ensuring that ecosystem-driven features like custom profiles, custom emoji, etc. actually land in the spec. - Figuring out how Matrix can be used by other ecosystems more effectively, to try to avoid ATproto/ActivityPub/Nostr/Beehive etc. reinventing Matrix.
icymi, in the Matrix State of the Union they said they didn't plan on pursuing decentralized social media, but they do hope to make it easier for those ecosystems to use Matrix so they don't have to reinvent what Matrix has already done
Thanks for the mention! The hard work has been done by @maski89.bsky.social.
If you want some more details, I wrote this thread about it some weeks ago:
bsky.app/profile/clem...
Our goal has not been to make a 3D tldraw, but to imagine a system where you can seamlessly move between 2D and 3D.
๐ฎ Like CRDTs and videogames? @inkandswitch.com is โจhiringโจ for a project that combines @automerge.org with @godotengine.org to make the next generation of collaboration tools for game development!
More detail here: inkandswitch.com/jobs/godot-i...
(Fully remote ๐๐๐ contract, late Nov to April)
Haha, very relatable
I'm teaching ๐ช๐ฟ๐ถ๐๐ฒ ๐๐ผ๐๐ฟ ๐ผ๐๐ป ๐๐ถ๐ป๐ ๐ฝ๐ฟ๐ผ๐ด๐ฟ๐ฎ๐บ๐บ๐ถ๐ป๐ด ๐๐๐๐๐ฒ๐บ(๐)! again. I'll be posting the videos & tasks on YouTube too.
In the first lecture, I explain what's a tiny system, why write one and show plenty of demos!
๐๏ธ Playlist: www.youtube.com/playlist?lis...
๐ More info: d3s.mff.cuni.cz/teaching/npr...
I should tag this thread with #uist2025
I'm at #uist2025 presenting our new work with @jonathoda.bsky.social!
๐๐ฒ๐ป๐ถ๐ฐ๐ฒ๐ธ is a computational substrate for end-user programming that makes it easy to implement programming experiences like programming by demonstration, collaborative editing and more!
tomasp.net/academic/pap...
I'm headed to #UIST2025 ๐ฐ๐ท to present our ๐ Best Paper (!!!), "Graffiti: Enabling an Ecosystem of Personalized and Interoperable Social Applications"
@karger.bsky.social and David Clark
doi.org/10.1145/3746...
Hereโs a paper preprint: pure.au.dk/portal/files...
The code (open source of course): github.com/Webstrates/S...
5 min video: www.youtube.com/watch?v=Md1S...
30 sec video preview: www.youtube.com/watch?v=iWep...
Spatialstrates is a collaboration between Aarhus University and Bangor University with @jensemil.bsky.social, @pwsbutcher.bsky.social, @ritsosp.bsky.social, and @nelmqvist.bsky.social.
Spatialstrates builds on a decade of work with Webstrates (webstrates.net), our web-based platform for malleable and collaborative software. With SpatialStrates, we now extend these ideas into the third dimension.
In fact, I presented Webstrates exactly 10 years ago at UIST 2015 in Charlotte.
These shared spaces can of course also be viewed and interacted with through a 2D representation.
In practice, this means you and a colleague can work in each your own digital room, with your own tools and objects, while keeping a shared space on, say, your desk where you can drop in objects.
Spatial transclusion allows spaces to be embedded within other spaces. If you know HTML, you can think of it partly like an iframe in space, a space inside a space, and partly like a shared Dropbox folder, where everything inside stays synchronized between those who share it.
For example, users can interact with objects on a digital whiteboard (think of Miro). But this board is in fact a projection of objects in a 3D space, allowing the objects to be viewed and interacted with seamlessly in immersive AR or VR as well.
To make this possible, Spatialstrates builds on two simple but powerful mechanisms: projection planes and spatial transclusion.
Projection planes map between 2D and 3D, enabling collaboration across realities so to say.
In Spatialstrates, users can interact collaboratively with digital content spatially whether itโs simple digital post-its, 3D objects, or interactive data visualisation pipelines as we illustrate in the paper.
Spatialstrates is a web-based platform for collaborative cross-reality computing. In practice, this means software that people can use together, simultaneously, whether they are on a conventional 2D screen on a laptop or inside an immersive 3D environment using a headset.
A split-screen figure shows a cross-reality collaborative space in Spatialstrates. The left side presents a first-person augmented reality (AR) view in a physical room, where a user interacts with floating 3D molecular structures, sticky notes, and analytics panels. A blue cursor line on a red sticky note represents a remote collaborator's position in 2D. The right side displays the same space in a 2D desktop interface, where 3D objects are flattened into a 2D layout: sticky notes and the analytics elements are having a very similar appearance compared to in 3D. The molecules have a different representation, displaying a table of atoms in the molecule instead. Black avatar icons indicate the projected position of the AR user's headset and controllers. The mouse cursor rests on the red sticky note.
Next week Iโll be at ACM UIST 2025 in Busan, South Korea, where @maski89.bsky.social will be presenting our work on Spatialstrates. In this project, we address the gap between everyday laptop-based computing and immersive experiences with augmented or virtual reality headsets.
Stakladen pรฅ ร rhus universitet, onsdag morgen og fyldt med tilhรธrere. Pรฅ scenen stรฅr vi tre hovedarrangรธrer og byder velkommen (jeg er til venstre i rรธdt).
Sidste slide fra afsluttende session i gรฅr eftermiddags: vi ses i 2035!
I denne uge har jeg og en stor del af mine kolleger vรฆret vรฆrter for over 250 internationale kolleger pรฅ en forskningskonference i ร
rhus, som mit forskningsmiljรธ afholder hvert 10. รฅr.
Dรฉt var sjovt. Og hรฅrdt. Men mest hรฅrdt i tiden op til og heldigvis hele tiden sjovt. >
#dkforsk
It's amazing to have the book in my hand now, after several years of working on it with Kasper and Per Ola.
In a nutshell, it's a new textbook for introductory-level HCI courses:
โ
10 parts, covering the whole HCI process
โ
864 pages and 1.9 kgs
โ
Open access (!)
Great! Excited to test it out.
Don't miss out on this opportunity to work with @jensemil.bsky.social, @aslanix.bsky.social, @stefaniezollmann.bsky.social, @tobiaslanglotz.bsky.social, @kenpfeuffer.bsky.social, @akhilarora.bsky.social or Davide Mottin ๐ Check out the projects. Apply before Aug 1โก๏ธ phd.nat.au.dk/for-applican...
Please share: I am looking for 1-2 PhD students working with me at the intersection of perception and augmented reality. Different directions are possible, depending on the background of the applicant. Application deadline 1st of August โ read more here: phd.nat.au.dk/for-applican...
Overview of the four PhD position's title and supervisors
Fully-funded #PhD positions in #ComputerScience at @au.dk ๐ฃ Apply for one of 4 projects in #HCI, #AI, #XR & #Cybersecurity โ or propose your own via the general call.
๐ phd.nat.au.dk/for-applican...
Deadline: Aug 1, 2025. โโก๏ธ @jensemil.bsky.social, @aslanix.bsky.social or @akhilarora.bsky.social
