Assistant prof @UofTCompSci. Computational imaging for science. Black hole photographer with @ehtelescope.

Toronto, Ontario
Joined November 2020
Excited to share our latest work! A collaboration with @thisgreyspirit @klbouman @maciekwielgus3 @_pratul_. See the project page for more details: imaging.cms.caltech.edu/orbi…
.@aviadlevis et al. reconstruct a 3D image of a bright flare orbiting the black hole Sagittarius A*. This image is computationally recovered from @almaobs lightcurve data by constraining a neural network with a gravitational model of black holes: nature.com/articles/s41550-0…
2
6
20
5,601
Nice expository article on his work by @_ilya_c, a PhD student in computational imaging at Princeton. Published in XRDS: The ACM Magazine for Students
4
17
131
12,681
"A" for Cosmic Galactic "Antennas"📡📡✨ #mondaymotivation
6
62
1
223
6,673
Wandering (and wondering) in this virtual world built by @themosaicuk is amazingly addictive! If you wander over to the gravity gallery, you might find an exhibit on latest work on 3D reconstruction (using neural radiance fields) of a flare around Sagittarius A*
We have lift off 🚀 View our new virtual exhibition here, in collaboration with researchers from @oxfordPhysics and @caltech themosaic.uk/the-art-of-astr… #scicomm #sciart #astroart #artofastrophysics
1
583
The Schiller lab is hiring PhD and post doc students for an ERC funded research on dendritic and network mechanisms of motor learning using state of the art methods. Atmosphere in the lab is lively and multi-cultural. Come join us.
3
50
2
100
20,464
To my computer science friends we developed NeRFs for black hole 3D imaging using general relativistic ray-tracing. We then reconstructed what the 3D environment around Sagittarius A*, the supermassive black hole at the center of the Milky Way, might look like.
1
2
238
To my astronomer friends we used @almaobs light curves from April 11, 2017 to reconstruct the 3D emission directly after an X-ray flare. By assuming an orbital model for the accretion disk we translate time series data to recover the initial 3D synchrotron emission structure.
1
196
The EHT has released new images of the M87* black hole from observations taken in April 2018. The brightness peak of the ring has shifted by about 30º compared to 2017, consistent with our theoretical understanding of variability from turbulent material around black holes.
11
149
28
578
116,400
Our new paper on toothed #whale jaws is out today in @CurrentBiology. The jaw of toothed whales is unique in that it is used for both #hearing & #feeding. We investigate what’s happened to the shape of the #jaw over 50 million years🐬 cell.com/current-biology/ful… – at Washington, DC
7
103
5
346
32,260
I plan to take on graduate students 🎓 working on Computer Vision 📷, AI 🧠, & Robotics 🤖 in @UofTCompSci. Interested in joining and becoming part of the broader @UofTRobotics and @VectorInst communities? Learn more at sgs.utoronto.ca/programs/com… 1/2
6
38
1
177
40,866
We are pleased to announce our newly hired faculty joining throughout 2023 and 2024. Welcome to @UofTCompSci! uoft.me/9W8
5
47
6,362
Seeing the world one photon at a time
A breakthrough imaging technique from @uoftcompsci researchers acts like a "microscope for time," capturing everything from the bounce of light off a mirror to the bounce of a ball on a basketball court — all in one take. uoft.me/9Rs
5
742
A deep-dive into the painful war between Hamas and Israel – the complex context, the dangers and possibilities – with @RoryStewartUK and @campbellclaret on @RestIsPolitics. Watch the full conversation on bit.ly/YNH-RestIsPolitics-Oc…, or listen on your preferred podcasting platform.
154
622
111
2,422
588,851
from what i could see, the global media, while covering the event, does not convey the full nature and extent of horrific day we experienced here in israel. this post by Yuval provides a clear and accurate view, for those who are interested. (trigger warning: all of them)
Please share, retweet or copy-paste to other platforms Yesterday, on Shabbat and one of the most sacred jewish holidays, around 6.30am Israel time Hamas started firing thousands of rockets into civilian population in Israel. reminding you that in Israel, unlike Hamas' tactics, civilian areas and military bases are clearly separated. Yet - Hamas, as usual, fired primarily on civilian targets intentionally. So far - this is typical Hamas tactics. The big difference this time was that Hamas launched a coordinated raid of hundreds of its soldiers, armed with assault rifles, machines guns, grenades and RPGs that left Gaza (which to remind you - Israel has one-sidedly withdrew from in full 18 years ago) - on a mission to kill and kidnap as many Israeli civilians as possible. Unfortunately - they succeeded immensely, capturing a military base that was in their way (and one may deem it "legitimate target"), but also capturing 22 civilian communities in Israel's south. On their way to these communities they shot to kill any vehicles or pedestrians they came across. They also hit a murderous, inhumane jackpot when they found over 2000 Israelis dancing in an outdoor festival nearby. They drove into the festival, running over them, firing machine guns and throwing grenades into the mass of people. Those who fled were shot while doing so, and those who tried to hide in nearby orchids were man-hunted and shot - or loaded on the terrorist pickup trucks and kidnapped to Gaza. When the terrorists arrived in the civilian communities, they shot everyone in sight. Entire families, grandparents, parents and young children who spent the holiday together. Many managed to lock themselves in their homes. The terrorists then went door-to-door, throwing grenades, shooting automatic guns and capturing entire families. I have a 4 year-old daughter. The video a 4 year old girl being taken from her parents and being kidnapped to Gaza doesn’t leave my mind. A 4 year old girl being kidnapped!!! Her parents who tried to resist - slaughtered in front of her eyes. She is now probably being held in a dark basement somewhere in Gaza. Official reports currently state 700 Israelis murdered and around 2500 wounded. Over 100 people were kidnapped in Gaza. Few of them are soldiers, most of them civilians. They have been paraded in the streets of Gaza, some of the women’s clothes were taken off and they were spitted and molested by the local crowds. The actual numbers are much higher - mostly because there are many people still missing and many bodies that were not identified officially. Estimates are of over 1000 Murdered and at least 3000 wounded. In relative terms - this translates to 40,000 murdered Americans, or over 10,000 murdered Germans or Brits. It translates to 160,000 murdered Chinese or Hindustanis. It translates to 150,000 wounded and over 4000 kidnapped Americans. It translates to 50,000 wounded and over 1000 kidnapped Germans or Brits. To 600,000 wounded and over 16,000 kidnapped Chinese or Hindustanis This is not just a major terror attack. This is even more than Israel’s 9/11. This is an all out declaration of war by Hamas - and Israel will meet this declaration of war with unprecedented retaliation and internal unity among its people. In the past year Israel has been torn apart by local politics. In the past 18 years since Israel withdrew from Gaza - the far right in Israel has called for its re-occupation to stop the firing of missiles and rockets on civilian populations in Israel. The vast majority of Israeli people were against it. Now, Israel is united again, with a clear, vicious, inhumane enemy. Just like Al-Qaida was to the US after 9/11 or like ISIS was, Hamas will be shuttered by Israel, not matter how long it will take. It will not bring back the lost lives. Moreover, there will no doubt be hundreds, if not thousands of lives lost - because unlike Israel, Hamas does not operate from military bases. They operate from within the civilian population of Gaza. They shoot their missiles from hospitals and schools. And unfortunately despite Israel’s warnings in advance to the Gaza population - they do not have much choice in objeting Hamas - who regularly kill their own civilians if they do not oblige, or for that matter - if they were gay, or denouncing islam, or any other thing that does not sit well with Hamas’ fundamentalist and murderous ideology. This concern has stopped Israel’s governments in the past. It will not stop it now. Israel will wage war to destroy Hamas. We are determined to never let something like this happen again. Stand with Israel. If you feel comfortable - please share the truth - because the mainstream media will likely not do so. Thank you for your support.
4
44
3
191
62,284
My old Tel Aviv apartment shattered from a missile blast. Please stay safe #Israel
2
5
1,205
We're excited to share our latest work! We achieve SOTA results in segmentation, detection, and depth estimation, in single and cross-domain, by exploiting image-aligned text prompts in a pretrained diffusion backbone repurposed for vision tasks. See vision.caltech.edu/tadp/ 🧵👇
3
29
7
175
36,026
awesome thread that illustrates the best part of being a scientist
It turns out that sparkling water and raisins are *fascinating*. My daughter and I happened upon this effect playing together in the kitchen a long time ago, and I couldn't help but explore the system more deeply... 1/n arxiv.org/abs/2308.12927
6
599
Exciting life update: I'll be joining @UofTCompSci as a tenure-track assistant professor starting July 2024! I feel lucky to have the opportunity to work with amazing students and colleagues in such a special environment. 1/n
9
2
3
115
22,309
In particular, @UofTCompSci seems to attract and foster that exact attitude towards interdisciplinary research. 4/n
1
5
733
I will definitely miss my time at @Caltech. I learned so much, but more than anything, its been an absolute pleasure working with @klbouman (and @thisgreyspirit, @_pratul_, and other twittery-challenged friends and colleagues). Or, as put so well by the tiny dragon
1
8
857