Q: What causes wheel squeal on tight curves?
Wheel squeal on curves is caused by the wheel flange making contact with the rail gauge face and sliding laterally under the combined effect of the vehicle’s tendency to travel in a straight line and the curved track geometry forcing it to turn. The squeal is the acoustic result of this stick-slip friction. Steered bogies, which actively rotate the wheelsets to better align them with the curve, can significantly reduce squeal. Lubrication systems on the rail or wheel flange also mitigate it. Squeal is particularly common on metro and tram networks where curves are tight and speeds are low.

From https://railwaynews.net/wiki/bogie-truck-explained-the-heart-of-rolling-stock

That sounds very familiar!

#Ottawa #OCTranspo #oct

⚡️ Nintendo Direct 2026 delivered almost an hour of reveals, a brand-new Xenoblade Genesis, trilogy remasters and a long-awaited remake of Ocarina of Time, plus a heap of ports and trailers.

Key dates and highlights: Rhythm Heaven Groove, July 2, 2026; Star Fox, June 25; Kingdom Hearts lands on Switch 2 on Oct 8; Final Fantasy Resonance, Oct 22. Prep your consoles, tons of ports, upgrades and EXCLUSIVE Switch 2 stuff incoming. ⚡️

#SteamAndEpic #Switch #Oct #Xenoblade #Resonance #EXCLUSIVE

⚡ Xbox Games Showcase, led by Asha Sharma, dumped a ton of reveals, from the Gears prequel Gears of War: E-Day (Oct 2026, EXCLUSIVE to Xbox) to the cinematic Fable and the tease of Persona 6.

They also showed a remake in Halo: Campaign Evolved (28 Jul 2026), Persona 4 Revival (18 Feb 2027), Minecraft Dungeons II (29 Sep 2026) and a new trailer for Call of Duty: Modern Warfare 4 (23 Oct 2026), plus Metro, DOOM DLC, State of Decay 3, Wo Long...

#SteamAndEpic #Persona #Gears #Xbox #Oct #EXCLUSIVE

Optical Coherence Tomography (OCT) Market Outlook 📈

The global OCT market is projected to grow from $2.1B in 2025 to $3.55B by 2029, expanding at a strong 14.1% CAGR. Growth is driven by rising eye disorders, higher healthcare spending, AI-powered imaging, and OCT integration in surgeries.

🔗 Free sample:
https://www.thebusinessresearchcompany.com/sample.aspx?id=8231&type=smp

#OCT #MedicalImaging #HealthcareMarket #MedTech

New blog post: OCT – My Framework for Digital Sovereignty, Part 1

https://jan.wildeboer.net/2025/12/OCT-1-My-Framework-For-Digital-Sovereignty/

Replies to this post will show up as comments under the blog post. I am looking forward to a constructive discussion.

#DigitalSovereignty #OCT

Went to #opticians last week for eye test and checkup, was slightly cursing myself for driving short distance but it was cold and pissing down with rain. Had to fight cursed #UI of parking machine to get my pay and display ticket (took several tries, but I refuse to download yet another app)

Thankfully my distant #eyesight is no worse than 2 years ago (although my #presbyopia has increased slightly to +1,50) - managed to unearth a #vuln in an #OCT scanner as I am very nearsighted - the level of this overflowed the software, optician had to use a different one!

Was shown all the pictures of the inside of my eye/optic nerve etc, all was good there (considering my age and near sight)

Got some #ramen from one of the Asian shops but didn't hang around long in town due to #weather (brr!)