In elementary #mechanics we are taught about the #SimplePendulum, which is modelled as a point #mass hanging via a rigid #rod or #string of a given length, under uniform #gravity. This simple model is also useful in introducing #OrdinaryDifferentialEquations and helps us to understand #SimpleHarmonicMotion.

Job - Alert

Wissenschaftliche:r Assistent:in Mechanics for Modelling 60 – 100 %

Start Date : 01.08.2025
Location: Switzerland, Winterthur

https://www.academiceurope.com/job/?id=7635

My #bike chain just randomly fell apart. One of the link sides just disapeared and the link was only held on the pins.

That's my first chain failure that doesn't involve it falling off.

I always wondered how people managed to break their chains on the road.
I still do...

Spotted this teaching aid in the corner of the farm equipment hall.

Can never resist something like that. So amazing to look into a machine and see what's going on.

It's no longer used, the rest is modern equipment (including some John DRMeere), but at least they kept this around

New video! The pump in my ZD-915 desoldering station stopped working! Let's investigate and try to fix it!

YouTube: https://youtu.be/QP5PTcFVfT4
PeerTube: https://makertube.net/w/g2iCf6nb8ZMmDwwf14FC6U

3D-printable lunar phase calculator prototype: Check.

Interesting story of a #women owned #garage in #Yorkshire in the 1980s (and the ladies who ran it were also #lesbian #activists). Whilst society has got marginally better for #LGBT people in the meantime, its still a shame that even today such a business remains unusual (whilst there are slightly more female #mechanics, they are still relatively rare or dependent on men as employers, and other women tend to just end up in admin roles) #automotive #cars

https://www.bbc.co.uk/news/articles/cm2dz0xenvpo

Giving @davepolaschek's suggestion a try. The T-40 wheel I found in the garage is getting some use as uh, round lever? What do you even call this.

It kinda worked. Well, it didn't budge as I was pulling, but when it fell over while under tension it levered the beam out of the ground sideways and a little forward.

Still refuses to go further, but I'm having a strong coffee and sweets and shall stubbornly continue.

The #AntikytheraMechanism: Data visualisation using #opensource and web-based #VR. See you next week at this year's #EVABerlin conference!
https://www.thomasweibel.ch/antikythera/

Managed to snag a slightly more modern #CarMaintenance #book from 2010 (only £7 second hand, cost about £30 new!) written as a textbook for #apprentice #mechanics (who would mostly be in late teens at further education #college), but a good read for me to get my head round how more modern #cars work and how such things as fuel injection, sensors and ECU interact (my older books, though detailed concentrate on things like carburettors and distributors which are not used in todays vehicles)

Hutt Valley - Mechanics

#third #Radiator #Philips #moe_tahurangi #Kōtuia #Equipment #Mechanics(Persons) #Writing #photographicgelatin #photographicpaper #silver #workprints #gelatinsilverprints #Wellington #undefined

http://api.digitalnz.org/records/40808622/source

Hutt Valley - Mechanics

#moe_tahurangi #Kōtuia #Equipment #Automobiles #Mechanics(Persons) #photographicgelatin #photographicpaper #silver #workprints #gelatinsilverprints #Wellington #undefined

http://api.digitalnz.org/records/40736366/source

When you buy a box of R-clips, this is basically mandatory:

Brand new.

https://www.thomasweibel.ch/meton/

Mechanical puzzle!

Found this neatly tied into an oily cloth. The old man really did keep everything.

Fun to figure out how it goes together!

Do you know what it is? There's several hints in there! The solution is in the alt text.

"We have come more and more under the dominance of mechanics and sacrificed living humanity to the dead rhythm of the machine without most of us even being conscious of the monstrosity of the procedure. Hence we frequently deal with such matters with indifference and in cold blood as if we handled dead things and not the destinies of men."

— Rudolf Rocker

Done: Meton, a mechanical moon phase calculator.

https://www.thomasweibel.ch/meton/

[x] design
[x] model
[x] 3d print
[x] build

#moon #newmoon #fullmoon #lunisolar #calculator #antiquity #archaeology #greece #babylon #mathematics #astronomy #physics #astrophysics #mechanics #simulation #opendata #openglam #glamhack #3dprint #physicalcomputing @paulfoerster

Yo, witches and werewolves: Showtime!

https://www.thomasweibel.ch/meton/

Our article on the #mechanics of "active" entropic biopolymer networks [possibly including #actomyosin, this is debated experimentally] is now published in J Elas.

Compared to enthalpic models, we're able to go right from the #thermodynamics of an unbiased #molecularMotor activity (in the spirit of the model by #JacquesProst for #myosin) at the molecular scale to a network-scale model in a closed form.

And we derive a method for solving quite easily the (usually tough) #viscoelastic #liquid model that we obtain, using #deformationGradientDecomposition.

https://doi.org/10.1007/s10659-024-10102-8
(I share a paywall-free link to my followers below, but it's also on arXiv: https://arxiv.org/abs/2405.07287 and on my webpage https://liphy-annuaire.univ-grenoble-alpes.fr/pages_personnelles/jocelyn_etienne/papers.html#Jallon+Etienne.2025.1)