#barina — Public Fediverse posts

Buffed out gnarly scratches on 2006 #Vauxhall / #Opel #CorsaC (#Holden #Barina for those in Australia) using mini 12 cordless rotary #polisher, using combination of 30mm microfibre pad / heavy compound + 30mm wool pad and medium compound.

Always a bit nervous about a rotary but this smol one seems aggressive enough when used on higher speeds but not excessively heavy on 20 year old clearcoat (I checked before and after with paint depth gauge and it isn't taking off loads)

Some scratches are quite deep and couldn't be entirely removed, but they are way harder to see now especially from 1 metre distance

#cars #detailing #PaintCorrection

Today new #sparkplugs, #coolant refresh and #oil change - had to jack up car and put ramps underneath other way round rather than drive on to them - bumper slightly fouls ramp ( #bladibarsket ).

Also chocked rear wheels for #safety

Sparkplugs are #Bosch 0 242 230 806 FQR8LEU2

( #AltText contains useful info on tools, methods etc if you have a #Vauxhall / #Opel / #CorsaC #HoldenBarina with #Z12XEP #engine, I try to put this info in the text on any of my #toots about #CarMaintenance )

[ as there's spare space in this toot I added #Holden #Barina as hashtags for anyone here who is in #Australia or #NewZealand #Aotearoa ]

🧮 A new algorithm to multiply two numbers, out of nowhere. Extremely simple!
It's basically a simple double iteration of a function of the 3n+1 problem (Collatz conjecture).
"#Multiplication #Algorithm Based on #Collatz Function" (David #Barina, 15 mai 2020)
• https://link.springer.com/article/10.1007%2Fs00224-020-09986-5
• https://sci-hub.uno/10.1007/s00224-020-09986-5

It is conditioned on Collatz conjecture being true. Which seems to be the case, although we can't prove it. (But one must always be wary of this kind of belief.)