Readit News logoReadit News
ohazi commented on A Cozy Mk IV light aircraft crashed after 3D-printed part was weakened by heat   bbc.com/news/articles/c1w... · Posted by u/toss1
the_mitsuhiko · 13 days ago
CF-ABS

> An alternative construction method for the air induction elbow, shown in the Cozy Mk IV plans, is a lamination of four layers of bi-directional glassfibre cloth with epoxy resin. The epoxy resin specified for the laminate has a glass transition temperature of 84°C, after the finished part has been post-cured. The aircraft owner stated that as the glass transition temperature listed for the CF-ABS material was higher than the epoxy resin, he was satisfied the component was fit for use in this application when it was installed

https://assets.publishing.service.gov.uk/media/69297a4e345e3...

ohazi · 13 days ago
What a misunderstanding -- glass transition temperature means different things for thermoplastics (i.e. anything that comes out of an FDM printer like the CF-ABS in question) and for thermosetting resins like epoxy that actually undergo molecular cross-linking during the curing phase. Thermoplastics will get soft and can deform without limit, while thermosets get rubbery but still more or less hold their formed shape.
ohazi commented on Bach Cello Suites (2024)   bachcellosuites.co.uk/... · Posted by u/bondarchuk
antognini · 3 months ago
The Bach Cello Suites are deservedly famous, but if you are looking to branch out to other solo cello music I recommend listening to Zoltan Kodály's Sonata for Unaccompanied Cello. After the Bach Cello Suites it is probably the most important piece in the solo cello repertoire. One of the unusual features of the piece is that it calls for the bottom two strings to be tuned down half a step which gives the cello a darker timbre.

https://www.youtube.com/watch?v=phygv_Et9sQ

ohazi · 3 months ago
Hey, Joe! This is one of my favorite cello pieces -- so hauntingly beautiful. I've probably listened to Janos Starker's performance dozens of times, but I also liked Inbal Segev's version. Parts of it seemed brighter somehow.
ohazi commented on U.S. bombs Iranian nuclear sites   bbc.co.uk/news/live/ckg3r... · Posted by u/mattcollins
ohazi · 6 months ago
Fuel grade is like 3%. It's exponentially harder to go from 3%-60% (months-years) than 60%-90%(days-weeks). So no, the only reason to enrich that high is to keep your breakout time threateningly short.
ohazi commented on A 32-bit processor made with an atomically thin semiconductor   arstechnica.com/science/2... · Posted by u/PaulHoule
ohazi · 8 months ago
I suspected that this was the case when they mentioned adding "one bit at a time" -- the CPU design that they implemented is Olof Kindgren's SERV [0], a tiny bit-serial risc-v CPU/soc (award-winning, of course).

From [1]:

> Olof Kindgren

> 5th April 2025 at 10:59 am

> It’s a great achievement, but I’m of course a little sad to see that it’s not mentioned anywhere that Wuji is just a renaming of my CPU, SERV. They even pasted in block diagrams from my documentation.

[0] https://github.com/olofk/serv

[1] https://www.electronicsweekly.com/news/business/2d-32-bit-ri...

ohazi commented on Silicon Labs Shrinks Wireless SoCs to Extend BLE to Miniature Devices   allaboutcircuits.com/news... · Posted by u/WaitWaitWha
anonymous_user9 · 9 months ago
The Hongjia HJ-131 is much smaller at 4x4x1.3mm https://www.renesas.com/en/document/dst/da14531-honjia-hj-13...
ohazi · 9 months ago
This doesn't integrate the antenna, so it's not comparable.
ohazi commented on I think we need a bigger boot partition   blog.fernvenue.com/archiv... · Posted by u/fernvenue
ohazi · 9 months ago
I encountered the same issue on my desktop, but ended up doing the partition surgery a little differently.

First I resized /, /home, etc. for some extra space, then I moved them all forward a bit, then I resized /boot. Complicated by various layers of LVM and encryption.

This took longer and in retrospect was perhaps a bit riskier, but it had the advantage of not needing to change any configuration on the actual system (since all of the partition numbers/names/uuids remained the same -- they just showed up at slightly different places with slightly different sizes). So the whole operation could be done entirely from a live/rescue environment.

ohazi commented on Ask HN: What less-popular systems programming language are you using?    · Posted by u/fuzztester
julianeon · 9 months ago
An interesting takeaway from this is that it looks like Rust has really fallen off, in terms of popularity. There was a time when it would've topped these lists (and yes I know you mentioned it - I mean people would've mentioned it anyway). It seems like Nim has claimed 100% of its mindshare.
ohazi · 9 months ago
Rust hasn't fallen off, it's just largely considered mainstream now.
ohazi commented on Is the world becoming uninsurable?   charleshughsmith.substack... · Posted by u/spking
MagicMoonlight · a year ago
What are we betting that the Americans rebuild in wood again? It seems like they never learn. We had a single city fire like this 500 years ago and since then we haven’t… because we built the city back in brick instead of wood.
ohazi · a year ago
Earthquakes.

Options are wood again, or steel and concrete.

ohazi commented on FreeBSD Suspend/Resume   vermaden.wordpress.com/20... · Posted by u/vermaden
ohazi · a year ago
RIP S3 sleep... Took years to get it to work reliably under Linux, then we had a good decade+ run of it "just working" like this, now back to trying to weed out all the wacky platform quirks and weird hardware/firmware behavior that make the S0ix states be just barely unusable.

Maybe in another five years...

u/ohazi

KarmaCake day14262March 14, 2012
About
[ my public key: https://keybase.io/ohazi; my proof: https://keybase.io/ohazi/sigs/u2oqI4nVgF9Yyb1YjmAKEpjlQl1CfsecN-t65kHYPeQ ]

If you want to email me: keybase > github > dotfiles > .gitconfig

View Original