Jason Yalim
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yalim.bsky.social
Jason Yalim
@yalim.bsky.social
4K followers 3.3K following 260 posts
Sr. ML Eng. @ PayPal's GFP ML R&D.

Formerly Assistant Research Professor, Computational Research Accelerator, a supercomputing-adjacent unit @ Arizona State University. PhD Applied Math. on stratified fluid flows.

math.la.asu.edu/~yalim

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yalim.bsky.social
10^80 is not 100 sextillion (10^23). It’s not 100 sextillion cubed. It’s arguably 100 quinvigintillion (100•10^{3*<latinsh for 25>+3}) or 80-plex [1].

Dismayed by confidently wrong information being forced to the top of a once dependable search engine.

[1]: The Book of Numbers, Conway & Guy 1996
“AI” gone bad, directly pulling from Wikipedia, making up a false equivalence, and pretending it’s backed by a link. Google falsely claims that 10^23 (100 sextillion) is 10^80. More bad information. The definition of a sextillion is presented as the definition for 100 sextillion.
February 21, 2025 at 4:15 AM
yalim.bsky.social
Ribeye roast from last night, first with the boy. Watched “it’s a wonderful life” for the first time. Sous cheffing “cızbız köfte” (onomatopoeic for grill sizzle sound) right now for my mom.

#HappyHolidays
Ribeye roast from last night. 3 hours indirect @ 250°F on grill + 1hr rest. My wife’s chimichurri from last night. Can’t eat beef without it now, haha Grilled zucchini for today. First half of köfte for today
December 25, 2024 at 7:12 PM
yalim.bsky.social
Peak sensational journalism here by @kqednews.bsky.social, as delivered by Apple News…

Hope everyone is safe!
The National Tsunami Warning Center canceled the warning in a bulletin around 11:55 a.m., noting that no tsunami observations were reported and no danger exists for the West Coast. Still, the bulletin advised not to reenter hazard zones until local emergency officials say it is safe to do so. Shaking from the large quake, which struck at 10:44 a.m., was felt across Northern California and the Bay Area, and it triggered early warning alerts on cellphones. It was followed minutes later by a magnitude 5.8 temblor in northern Sonoma County, according to the U.S. Geological Survey. The National Weather Service had issued a tsunami warning after the earthquake, covering the Bay Area and other coastal areas stretching from Santa Cruz County to Oregon. [Highly inappropriate image from a movie of a giant tsunami heading towards a bustling Golden Gate Bridge] Emergency alerts blared on cellphones across Northern California, and officials rushed to order evacuations for coastal areas in the tsunami risk zone, including West Berkeley and parts of Del Norte County. Schools in Oakland were sheltering in place, and one campus in West Oakland was evacuated. Even Salesforce Tower and other downtown San Francisco buildings were in the process of being cleared out, a representative for Pier 39 said before the tsunami warning was canceled. BART stopped service in the Transbay Tube in all directions due to the earthquake, and normal service resumed at 11:45 a.m., the agency said.
December 5, 2024 at 8:54 PM
yalim.bsky.social
One more photo.
My mother and wife really made and directed the show. I did my best to help and not burn anything. After over two decades of sous-chef training, I am slightly better. Many dishes to clean for me today!
#AlwaysLearning #SupportTheCooks
Charcuterie board. Costco shoppers will recognize the cheeses and some of the boards. Includes: • overnight EVOO soaked mozzarella balls, “sugar bomb” tomatoes, and cherry tomatoes on a stick, • Swiss gruyère (extra cavey), • extra sharp cheddar (orange), • Trader Joe’s “Unexpected Cheddar,” • brie, • organic unsalted cashews, • roasted hazelnuts, • candied almonds, • organic strawberries, • honeycomb, • pecans, • organic grapes, • candied oranges, • homemade deviled eggs, • Jamón, chorizo, salami, and prosciutto, and finally my sister’s Starbucks water. Even more not pictured to the left, including a variety of crackers and homemade brie-cranberry bites.
November 29, 2024 at 5:33 PM
yalim.bsky.social
I did a terrible job taking photos or videos of the feast yesterday, but I am fortunate for my family:
November 29, 2024 at 5:17 PM
yalim.bsky.social
Thanks for the inspiration, fun one.
Screenshot of NYT report on my wordle run. I think I was luckier than 55/99.
November 29, 2024 at 4:55 AM
yalim.bsky.social
Happy Thanksgiving
A schedule for cooking for 24 with 3 and 1 seven-month old. 3PM became 4:45. Next year we’ll go for 3 and 4:30.
November 29, 2024 at 4:34 AM
yalim.bsky.social
Doing my best to maintain the observed equilibrium
A cat (Tango) in a planter
November 24, 2024 at 11:52 PM
yalim.bsky.social
Vermillion flycatcher from this morning.

#birdsky
Vermillion flycatcher after gobbling a worm scooped from the ground.
November 24, 2024 at 8:18 PM
yalim.bsky.social
NYTimes as pictured with their article on BSky being a “strong alternative” to X. It’s an “Always has been” meme template but the Earth, imaged as a giant Puerto Rico, is labeled BSky, with the astonished USA astronaut labeled “NYTimes” and the gun-pointing Puerto Rican astronaut labeled L “BSky Users.” The former astronaut states, “Wait, X — formerly Twitter — is now BSky?!” To which the latter astronaut simply says, “Always has been.”
November 24, 2024 at 1:32 PM
yalim.bsky.social
Post a non-religious photo you think of as holy.

Here’s the 2013 “Pale Blue Dot” as imaged by the Cassini space probe, inspired by the original 1990 Voyager-1 image.

The dot is Earth.
Saturn (upper left), its rings, and the Earth (bluish dot near the center right of image). CREDIT: NASA/JPL-Caltech/Space Science Institute Image above and description below from: https://www.esa.int/ESA_Multimedia/Images/2013/07/Cassini_s_Pale_Blue_Dot From: https://www.esa.int/ESA_Multimedia/Images/2013/07/Cassini_s_Pale_Blue_Dot In this rare image taken on 19 July [2013], the wide-angle camera on the international Cassini spacecraft has captured Saturn’s rings and our planet Earth and Moon in the same frame. The dark side of Saturn, its bright limb, the main rings, the F ring, and the G and E rings are clearly seen; the limb of Saturn and the F ring are overexposed. The ‘breaks’ in the brightness of Saturn’s limb are due to the shadows of the rings on the globe of Saturn, preventing sunlight from shining through the atmosphere in those regions. The E and G rings have been brightened for better visibility. Earth, 1.44 billion km away in this image, appears as a blue dot at centre right; the Moon can be seen as a fainter protrusion off its right side. The other bright dots nearby are stars. This is only the third time ever that Earth has been imaged from the outer Solar System. The first image was taken by NASA’s Voyager-1 in 1990 and famously titled “Pale Blue Dot”. In 2006, Cassini imaged Earth in the stunning and unique mosaic of Saturn called “In Saturn's Shadow – The Pale Blue Dot”. The new images marked the first time that inhabitants of Earth knew in advance that their planet was being imaged. That opportunity allowed people around the world to join together in social events to celebrate the occasion. This view looks towards the unilluminated side of the rings from about 20º below the ring plane. — description truncated from here due to character length limit
November 21, 2024 at 3:00 PM
yalim.bsky.social
@thejburks.bsky.social presenting his excellent work at CIQ’s #SC24 booth on making Warewulf diskfull and his production design for ASU’s supercomputers. Among many improvements, his effort ultimately improved Sol’s HPL score by 5%

#HPC
Josh Burks presenting his work at CIQ’s SC24 booth. He’s looking sharp behind a lectern. The title slide from his presentation is shown on a large TV, “Maximizing Memory: Arizona State University’s Disk-full Take on Warewulf.”
November 19, 2024 at 7:52 PM
yalim.bsky.social
NASA’s Nicky Fox is presenting an enchanting plenary for #SC24. The high-impact applications she’s highlighting from Earth’s weather to aerodynamics to #CFD to medicine to space flight to space weather and more all depend on 🧪 and #HPC!
NASA’s Nicky Fox delivering an incredible plenary for #SC24. Here she is discussing monitoring the uncontrolled wildfires in Pacific states this year Screenshot from a video of NASA’s Nicky Fox (pictured on stage, to the right) presenting gorgeous rotor flow for better understanding the aerodynamics of smaller aircraft like drones. Also pictured is the SC24 sign-language translator doing an excellent job. Visualization of a parachute inflation simulation, with SC24 plenary speaker, NASA’s Nicky Fox, pictured to the right. Her excellent sign-language interpreter is pictured to the left. SC24’s plenary speaker, NASA’s Nicky Fox, presenting a coronal mass ejection event from Sep. 29, as imaged by the GOES-19 satellite
November 19, 2024 at 2:31 PM
yalim.bsky.social
Always impressive to see the #SC24 turnout at the Tuesday plenary. Will we hit 15,000 attendees this year?
Macro photo of a part of the #SC24 plenary audience. There are a lot of people in this photo, almost all interested or active in HPC
November 19, 2024 at 1:50 PM
yalim.bsky.social
ASU’s Sol supercomputer is now the 438th fastest and 90th greenest supercomputer on Earth! This was made possible by @thediymaker.bsky.social and Alex Chiquete’s hard work to create power monitors, and @thejburks.bsky.social’s warewulf reimage of Sol, gaining another 5% performance!
#HPC #SC24 🦾💻🧪
Screenshots layered together of the Green500 results for ASU’s SOL supercomputer on the Nov. 2024 list. Sol is the 90th greenest supercomputer on Earth, as measured by the Green500’s “Energy Efficiency.” Also shown is Sol’s Top500 rank of 438, as well as Sol’s high-performance impact score of 2.55 PetaFlop/s (2.55 quintillion 64-bit floating-point operations per second).
November 18, 2024 at 9:09 PM
yalim.bsky.social
Very excited for @victoriauribe.bsky.social and @jenceydole.bsky.social to present their lightning talk at the #WHPC #SC24 workshop on starting a WHPC student org. at ASU! They’re talking in just a few minutes, come see these amazing women who are working to lift their peers’ #HPC careers!
Victoria (on left) and Jencey (on right) pictured below an SC24 logo
November 18, 2024 at 7:12 PM
yalim.bsky.social
@thoefler.bsky.social fascinating keynote @ #SC24 AI4S workshop. Highlights: humanity is in the “Age of Computation,” Fortran & wavelets being great for #CFD, & his work in metaprogramming for better #HPC codes, ML for better observational science, & potentially controversial “AI scientists.”

🦾💻🧪
Torsten Hoefler presenting his keynote for the AI for Science (AI4S) SC24 workshop. He is pictured talking behind a raised podium, with a slide arguing that humanity has left the Information Age and entered the “Age of Computation.”
November 18, 2024 at 2:48 PM
yalim.bsky.social
Trying not to wonder too much about all the distributions that make up this beer while having a nice drink with our #sc24 crew before the exhibitors reception

@thediymaker.bsky.social
@thejburks.bsky.social
@thomasjennewein.bsky.social
@victoriauribe.bsky.social
@jgarciamesa.bsky.social
An American IPA from the Stats brewpub. I asked — it’s a sports statistics reference
November 17, 2024 at 11:10 PM
yalim.bsky.social
Excellent ExaMPI workshop keynote by Nikoli Dryden on “the past and future role of MPI in deep learning.” He posed five research directions on his last slide, shown below!

#sc24 #hpc #deeplearning #ml #ai #mpi 💻🧪
Last slide from Nikoli Dryden’s SC24 ExaMPI workshop keynote. He proposed five research directions on the bottom half, verbatim copied below: 1. Deep learning has embraced compilers — how can MPI integrate with them to optimized communication? 2. How do you express & implement fusion of (arbitrary) computation with (arbitrary) communication? 3. How do you handle changing datatypes and/or aggregation within communication & reductions? 4. How do we design & implement collectives for emerging networks/topologies (esp. dense cliques) 5. What are the right algorithms and how to select them for small (~10 GPU) and large (~100k GPU) clusters?
November 17, 2024 at 3:07 PM
yalim.bsky.social
Just landed to some peach skies, excited for the first day of workshops tomorrow!
#hpc #sc24
Picture from a plane window of a vibrant twilight over Atlanta, Georgia.
November 16, 2024 at 11:29 PM
yalim.bsky.social
I would like to be an official friend of Adrien-Marie Legendre
Famous portrait of Adrien-Marie Legendre by Jules Boilly. Here he is seen after someone spelled Chebyshev in a new way.
November 14, 2024 at 3:29 AM
yalim.bsky.social
What is this plant/tree?! Seen at (33.4213096, -111.9349622) on ASU’s Tempe campus.
An unknown plant or tree on Arizona State University’s Tempe campus. The Fulton Center is in the background, with a peek of “A Mountain” to the left. Durham hall is to the right.
November 9, 2024 at 6:47 PM
yalim.bsky.social
A lot of 🧪 to do here, which helps guide policy. I’m full of naive questions. This seems to make a good night’s sleep all the more important. How impactful are these nanoplastics on forming new neural connections, and how causal is this tissue pollution to trends in mental and physical health?
KC Green’s “This is fine” webcomic superimposed with copies of the Science Friday graphic “Microplastics in water” from shutterstock. Microplastics are coarsely shown in the calm dog’s brain.
October 4, 2024 at 3:21 PM
yalim.bsky.social
@saraimari.bsky.social presenting a fascinating keynote for our ASU Research Computing Expo, “Pushing the Boundaries: The Role of Advanced Computing in Scientific Discovery for the Origins of Life.” Always like to start my mornings with the Hubble deep field and existential questions!
Prof. Sara Walker presenting her keynote for ASU’s Research Computing Expo. The slide shown has an illustration of Earth as viewed from near space, with a line of text “despite all those possibilities, currently we only know of one inhabited planet…“ “Sample size of one” was said to describe the slide and also describes sharing only this photo for her significant keynote.
October 2, 2024 at 5:08 PM
yalim.bsky.social
Nice vis! Paraview? Also, what is the source of the high-frequency oscillation (example circled in red in screenshot)?
OP’s visualization of Earth’s ozone hole with a high-frequency oscillation circled in red.
September 22, 2024 at 4:13 PM