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Luke Johnson

@lukejohns.online
30 followers 26 following 178 posts

(Reading this from Bluesky? Follow ap.brid.gy so I can see your replies) Postdoctoral Research Fellow at the Institute for Mechanobiology, Northeastern […] 🌉 bridged from ⁂ fedi.lukejohns.online/@luke, follow @ap.brid.gy to interact

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Luke Johnson @lukejohns.online · 02/10/2026
RE: fedi.lukejohns.online/@luke/1172138… Again? Seriously?? Someone really needs to do something about this
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Cambridge Day @cambridgeday.com · 26/09/2026
Cambridge’s worst intersections getting safety makeovers “High Crash Locations” are the target of a new effort by the Department of Transportation, starting with three between MIT and Central Square....
cambridgeday.com
Cambridge’s worst intersections getting safety makeovers
“High Crash Locations” are the target of a new effort by the Department of Transportation, starting with three between MIT and Central Square.
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Luke Johnson @lukejohns.online · 15/09/2026
Near miss today at Mass Ave and Haviland St reminded me that: 1. I really need new brake pads, and 2. Mayor Wu is a massive safe streets disappointment #massbike #boston #safestreets
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Luke Johnson @lukejohns.online · 05/09/2026
RE: fitpub.social/activities/4fc06bbe-3… The train I was racing got to Park Street just before me, but on the day (a Friday evening) there could be more traffic and passengers slowing the train down 🤞 rundirtywater.com/charlie
fitpub.social
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Luke Johnson @lukejohns.online · 04/09/2026
RE: fedi.lukejohns.online/@luke/1152039… Wait, it's #BandcampFriday again already? And this blog post is almost a year old?? How time flies. Take a listen for free: lukejohns.bandcamp.com/album/bits-p… You could even be my first follower!
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Madeleine Bonsma-Fisher, PhD @mbonsma.bsky.social · 03/09/2026
The highest high: paper is finished The lowest low: paper is 90% finished
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Luke Johnson @lukejohns.online · 21/08/2026
RE: techhub.social/@jerzone/11713505346… I'm hooked, not even a minute in and we've already had "two-stroke * two cylinders = four stroke 🤓" and "OEM ziptie"
techhub.social
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Luke Johnson @lukejohns.online · 15/08/2026
RE: fitpub.social/activities/7f7c731b-f… Not the sort of thing you could do in many US cities!
fitpub.social
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Luke Johnson @lukejohns.online · 03/08/2026
RE: fitpub.social/activities/6fd5c983-3… When I stopped using Strava ages ago there wasn't a replacement on the Fediverse to share activities - but now there is! I've just signed up on @fitpub and you should take a look if you haven't heard of it yet.
fitpub.social
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Luke Johnson @lukejohns.online · 29/07/2026
With #YVR economy as it is, I shouldn't be too surprised that Breka (the 24 hour bakery and cafe) is getting into real estate... dailyhive.com/vancouver/8555-cambie…
dailyhive.com
Breka Bakery & Cafe proposes 30-storey hotel tower in Vancouver | Daily Hive | Urbanized
Breka Bakery & Cafe's proposal to build a 30-storey hotel tower at 8555 Cambie St. in Vancouver includes a new industrial bakery facility.
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Luke Johnson @lukejohns.online · 10/07/2026
I haven't even been home for one day and mum's already got me haymaking
A man in faded green shorts and a flowery shirt rakes long grass into piles in a back garden. Three sacks stuffed with hay lie on the ground around him.
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Luke Johnson @lukejohns.online · 23/06/2026
RE: fedi.lukejohns.online/@luke/1167949… So as not to interrupt the science I'll split off the flight review here. We're talking the peak of transatlantic luxury folks - Condor!
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Luke Johnson @lukejohns.online · 14/06/2026
@garius
A post by @garius.bsky.social related to recent naval events: "interesting little historical convergence in that HMS Ledbury was involved in boarding that Russian shadow fleet tanker. A previous vessel of that name had an interesting history when it came to tanker operations as well..."A "Ledbury mentioned!!" meme: a celebrating anime girl is overlaid on the Ledbury market house and wears a hoodie with a Hereford cow on it, a baseball cap saying "ask me about poetry". She also carries a 2L jug of Old Rosie and a picture of HMS Ledbury is pasted in the bottom left corner.
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Luke Johnson @lukejohns.online · 02/06/2026
🍤 #cats #catsofmastodon
Frankie the tux cat having a snooze in the window and doing her best shrimp impression
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Luke Johnson @lukejohns.online · 19/05/2026
Today marks the traditional first day of Boston summer (the red line has broken down because it's too hot)
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Luke Johnson @lukejohns.online · 22/04/2026
RE: fedi.lukejohns.online/@luke/1161338… Continuing my Works In Progress posting - this article is overall a good discussion of the differences in hiring and firing flexibility and how it influences how risk-averse companies are. BUT the motivating argument is, er, suspect at […]
fedi.lukejohns.online
Original post on fedi.lukejohns.online
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Luke Johnson @lukejohns.online · 20/04/2026
Marathon day in Boston 👟 Before checking, I was expecting the route to take advantage of all those big waterfront roads and take the runners past a load of landmarks, but nope - just miles and miles of suburbia!
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Luke Johnson @lukejohns.online · 08/04/2026
Now playing, while I try and knock off as much admin as possible: "Parklife" by Blur #vinyl #nowplaying
The album sleeve for "Parklife" by Blur, cover art featuring two greyhounds with muzzle cages running towards the camera during a dog race, is propped up behind an Audio-Technica "sound burger" record player playing a gold-coloured LP.
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Luke Johnson @lukejohns.online · 08/04/2026
Spotted in CHA Cambridge Hospital: one of these is not like the others! 🏴󠁧󠁢󠁷󠁬󠁳󠁿 🏴󠁧󠁢󠁷󠁬󠁳󠁿 🏴󠁧󠁢󠁷󠁬󠁳󠁿
A large blue welcome banner with the word for "welcome" translated into multiple global languages. One of which is, for some reason, Welsh.
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Luke Johnson @lukejohns.online · 01/04/2026
Here's a somewhat scummy thing that Claude does to keep you trapped in the platform: when you export a report to markdown or PDF, the reference hyperlinks aren't included! There's no technical reason for this, just keeping people tied to the service. 😤
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Luke Johnson @lukejohns.online · 25/03/2026
All-time great musical direction in Chichester Psalms #Bernstein
Musical direction for the sopranos: "(Blissfully unaware of threat)"
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Luke Johnson @lukejohns.online · 06/03/2026
I've just finished registering Blue (pictured) in the UK! One interesting thing: for first-time registrations of imported classic cars, the DVLA gives you a period-correct plate number. 1/2
A small blue convertible car overlooking a scenic ocean view.
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Luke Johnson @lukejohns.online · 27/02/2026
WHAT www.youtube.com/shorts/TLOcas01wGc
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Corvid Space Program @portlygent.mastodo.neoliber.al.ap.brid.gy · 25/02/2026
RE: fedi.lukejohns.online/@luke/1161338… My therapist: the Art Nouveau cricket angel isn't real, it can't hurt you. The Art Nouveau cricket angel:
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Luke Johnson @lukejohns.online · 25/02/2026
One of my favourite little things about the print edition of Works In Progress magazine (you should subscribe! worksinprogress.co/print) is the absurd effort put into a lot of the advert pages.
worksinprogress.co
Print - Works in Progress Magazine
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Luke Johnson @lukejohns.online · 20/02/2026
RE: fedi.lukejohns.online/@luke/1161034… Self-quoting this new pose for all the Frankie fans out there! #catsofmastodon
fedi.lukejohns.online
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Luke Johnson @lukejohns.online · 19/02/2026
Today's hearty dishonourable mention goes to Windows 11, which has decided to restart overnight and interrupt an analysis that takes 36 hours... two nights in a row! Don't worry, Microsoft, it's not as if I have an abstract due this week or anything 🙃
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Owen @oweninvan.bsky.social · 17/02/2026
If you live or work in Vancouver, you can join OneCity for $1 to vote in the progressive primary, today only. www.onecityvancouver.ca/jointheprogr...
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Luke Johnson @lukejohns.online · 14/02/2026
Love to watch Frankie dreaming and/or getting possessed #catsofmastodon
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Luke Johnson @lukejohns.online · 09/02/2026
We ended up in a place last night where they were explicitly only showing the Super Bowl for the half time show (they even had a "Benito Bowl" special menu!). Given how the actual football went it was probably the best place to be in Boston! #superbowl #badbunny
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Luke Johnson @lukejohns.online · 06/02/2026
Oh wait, it's Bandcamp Friday? I've got one of them! lukejohns.bandcamp.com/album/bits-p… #BandcampFriday
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Luke Johnson @lukejohns.online · 03/02/2026
I was impressed with all of the snow clearing here immediately after last weekend but after two days it seemed like cities just... gave up? #boston
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Luke Johnson @lukejohns.online · 26/01/2026
RE: fedi.lukejohns.online/@luke/1159626… Here's a writeup from #UBC Orthopaedics: orthopaedics.med.ubc.ca/luke-johnso…
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Luke Johnson @lukejohns.online · 26/01/2026
It is a great honour for my paper on cartilage health after Perthes’ disease to be selected by Arthritis Society Canada as one of their top 10 research advances of 2025! arthritis.ca/about-us/news-stories/…
arthritis.ca
## _Canadian research breakthroughs deliver earlier diagnoses and more effective treatments with the power to change lives_ **January 26, 2026 (TORONTO)** – Arthritis Society Canada announced its Top 10 Research Advances of 2025 today, highlighting discoveries that are advancing how arthritis is diagnosed, treated and prevented. Made possible through the generosity of donors and supporters, these defining studies are accelerating progress toward better outcomes for more than 6 million Canadians living with arthritis, and the millions more at risk. “These discoveries represent innovation in action,” said Dr. Siân Bevan, Chief Science Officer at Arthritis Society Canada. “Thanks to the commitment of our donors and researchers, we are transforming these discoveries into real-world improvements for people living with arthritis – from children needing earlier treatment to women facing increased health risks beyond joint health.” ## Earlier treatment, better outcomes for children with arthritis For children with non-systemic juvenile idiopathic arthritis (JIA), starting biologic medication earlier can significantly improve treatment success, according to research led by Dr. Susanne Benseler at the University of Calgary, and Dr. Rae Yeung from The Hospital for Sick Children, as part of the UCAN CAN-DU and UCAN CURE consortia. The study found that 83% of children who began biologics within 6 months of their initial symptoms achieved inactive disease, compared to 57% of those who waited 13 to 24 months. With each month of delay, the odds of still having active arthritis increased by a relative 9%. These findings reveal a critical window of opportunity for early intervention and could help doctors make more informed decisions about when to initiate biologic therapy, improving the long-term outcomes for children with arthritis. This study marks a critical step towards a cure for childhood arthritis. ## Connecting osteoarthritis and heart disease in women Women with osteoarthritis (OA) face a substantially greater risk of developing cardiovascular disease, according to new research by Dr. Anthony Perruccio from the Schroeder Arthritis Institute at University Health Network. The study found that women with OA had a 90% higher risk of developing cardiovascular disease within six years, compared to women of the same age without OA. By identifying OA as a potential risk marker for cardiovascular disease in women, this research underscores the importance of earlier risk identification and aims to prevent cardiovascular disease and associated deaths in women with OA. “Systemic inflammation may be a key link between osteoarthritis and cardiovascular disease in women,” said Dr. Anthony Perruccio. “Recognizing and addressing this risk earlier could open the door to better prevention strategies and improved long-term health for women living with OA.” ## A pain-free future on the horizon Last year Arthritis Society Canada invested $7 million to drive innovative research aimed at improving arthritis care and reducing pain. From identifying critical windows for early treatment to uncovering new disease connections and potential drug targets, research advances from the past year are deepening our understanding of arthritis and bringing us closer to more personalized, effective therapies. See the full list of **Top 10 Research Advances of 2025**. ### About Arthritis Society Canada Arthritis Society Canada represents the six million people in Canada living with arthritis today, and the millions more who are impacted or at risk. Fueled by the trust and support of our donors and volunteers, Arthritis Society Canada is fighting arthritis with research, advocacy, innovation, information and support. We are Canada’s largest charitable funder of cutting-edge arthritis research. We will not give up our efforts until everyone is free from the agony of arthritis. Arthritis Society Canada is accredited under Imagine Canada’s Standards Program. For more information, visit arthritis.ca. **Media Contact:** Jenny Ng Senior Manager, Communications and Public Relations [email protected] 416-455-1182
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Vision Zero Vancouver @visionzerovancouver.ca · 26/01/2026
In 2020, Vancouver Council voted to protect kids by making 30 km/h zones all day around schools. All the city had to do was swap out the old signs. Nearly six years later, they're still not done. Drop pictures of old 8-5 signs in the replies, so we can show council that they need to step it up!
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Luke Johnson @lukejohns.online · 24/01/2026
Had to keep my eyes off the news for a bit so I drew Frankie #catsofmastodon
A sketch portrait of Ms Rosalind Aretha Franklin, a tuxedo cat
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GRIDS Vancouver @grids.reillywood.com · 20/07/2025
1997 Yaletown condo with an unfortunate layout; it'd be better if the "den" was just more living room space, but the zoning at the time incentivized weird solarium things www.realtor.ca/real-estate/...
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Luke Johnson @lukejohns.online · 17/01/2026
New arrival. Happy Friday evening everyone! #vinyl #blondie
A photo of a Sound Burger record player playing "Parallel Lines" by Blondie. The album's sleeve with its classic artwork is in front.
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Luke Johnson @lukejohns.online · 12/01/2026
New spot just dropped #catsofmastodon #loaf
A tuxedo cat loafs precariously on a puzzle box, itself on top of a half-finished jigsaw puzzle of US national parks.
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Northeastern University Institute for Mechanobiology @nu-mechanobiology.bsky.social · 09/01/2026
❤️🔬 A great start to the new year for Dai Lab at IfM, where PhD students Catherine Karpova & Stefanie DeFronzo have both been awarded prestigious American Heart Association Predoctoral Fellowships to advance models of cardiovascular disease and inherited bleeding disorders. Huge congratulations! 🎉
mechanobiology.sites.northeastern.edu
Dai Lab Graduate Researchers Receive American Heart Association Predoctoral Fellowships
Dai Lab Graduate Researchers Receive American Heart Association Predoctoral Fellowships Stefanie DeFronzo (left) and Catherine Karpova (right) Congratulations to Dai Lab PhD students Catherine…
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PAIGE! @paige.canadiancivil.com · 03/01/2026
Taking the next step with Canadian Civil in 2026 site.canadiancivil.com/what-is-cana…
site.canadiancivil.com
Canadian Civil: From Passion Project to a National Reform Organization
What is Canadian Civil? Here's an attempt to explain what I'm trying to do with Canadian Civil in the next year.
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Luke Johnson @lukejohns.online · 24/12/2025
🎄 Early Christmas present! 🎄 I managed to squeeze one more paper out of my PhD, and here's my web summary. Plus some juicy behind-the-scenes details! lukejohns.online/research/perthes_d… #academia #biomechanics #perthes #finiteelement
lukejohns.online
Research summary: Perthes’ disease and cartilage stress
In the last publication from my PhD thesis, I made a “digital twin” finite element model of the hip to predict damaging stresses in the cartilage during walking. I demonstrated this by simulating both hips in a single patient with Perthes’ deformity—one side affected and the other unaffected. The results of this demonstration showed the importance of considering not just the forces applied to the hip but also its motion, and similar techniques could be used to tailor patient-specific surgical or non-surgical management pathways for patients with residual Perthes’ deformity.
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Luke Johnson @lukejohns.online · 24/12/2025
I just came across this pic of me (on my old fediscience account) giving them the ol' razzle dazzle at COA and I thought you might like to see it too.
Luke gives the audience the ol' razzle dazzle during a conference presentation.
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Luke Johnson @lukejohns.online · 08/12/2025
Excited to share the final paper to come out of my PhD! "A biomechanical digital twin of Legg–Calvé–Perthes disease deformity", now available #openaccess in IJCARS: link.springer.com/article/10.1007/s… #academia #biomechanics #perthesdisease
link.springer.com
A biomechanical digital twin of Legg–Calvé–Perthes disease deformity - International Journal of Computer Assisted Radiology and Surgery
Purpose The dynamic stress environment in the hip joint is thought to contribute to pain and osteoarthritis (OA) in people with Legg–Calvé–Perthes disease (LCPD) deformity, but is poorly understood, limiting clinical management options. The objective of this study was to develop and evaluate a patient-specific biomechanical “digital twin” model of LCPD to predict chondrolabral shear stress in dynamic and static loading scenarios. Methods We produced a digital twin model of both hips in a patient with unilateral LCPD deformity using anatomical magnetic resonance imaging (MRI) and the ArtiSynth modeling platform. We evaluated the model’s sensitivity to changes in material properties and joint angles during a typical gait cycle, and verified its stress and femoral translation predictions against upright open MRI of the hip in high-flexion postures. Results The model’s prediction of the highest chondrolabral shear stress during a gait cycle was 22–93% greater in the LCPD hip than in the unaffected hip. The model was sensitive to changes in material parameters and joint angles, but could accurately reproduce femoral translation and expected stress distribution in extreme static postures. Conclusion This study demonstrates the importance of both dynamic motion and morphology in the stress environment of highly aspherical hip joints. Although some challenges remain, digital twin models are a promising tool to study the long-term outcomes of LCPD, and could be applied in future to aid clinical management.
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Luke Johnson @lukejohns.online · 04/12/2025
Made my very first long-distance Amtrak trip (Ft Lauderdale to Boston) after the Thanksgiving weekend, and I cannot express how much more pleasant it is than flying
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Northeastern University Institute for Mechanobiology @nu-mechanobiology.bsky.social · 26/11/2025
Last week we launched "IfM Skills Workshops", an occasional series focusing on methods and research skills. Sri Sai Priya Avuthu and Louison Thorens got us off to a great start in the inaugural workshop - hopefully the first of many - all about techniques for quantification of fluorescence images!
Sri Sai Priya Avuthu presenting her experience with fluorescence microscopy.
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PoLiTiPeT @politipet.piaille.fr.ap.brid.gy · 23/11/2025
Hi there @brenttoderian.bsky.social ! Did you also foster bridging to Mastodon e.g. suggesting to people on your very fine list that they follow @ap.brid.gy ?
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Luke Johnson @lukejohns.online · 21/11/2025
Latest Frankie update: she's not normally allowed in the kitchen (keeps licking the bread) but yesterday she found a loophole. Look at that smug face. #catsofmastodon
A tuxedo cat looks down at the camera from the gap between the top of the kitchen cupboards and the ceiling.
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Luke Johnson @lukejohns.online · 20/11/2025
www.youtube.com/watch?v=6zXCb2n_29Y It's not too long since these classic trains ferried me to and from Paddington, so it is downright surreal to see their "adaptive reuse" on the Lagos Red Line in Nigeria. #rail #transit #train
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Luke Johnson @lukejohns.online · 20/11/2025
www.youtube.com/watch?v=6zXCb2n_29Y It's not too long since these classic trains ferried me to and from Paddington, so it is downright surreal to see their "adaptive reuse" on the Lagos Red Line in Nigeria. #rail #transit #train
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