jonathan ridley

Engineer, Associate Professor and author. Any opinion or views expressed are my own and not that of my employer.

[Warsash Maritime School @warsashmaritime]

Huge congratulations to #SolentUni and #Warsash course leader in yacht engineering, Giles Barkley, who was presented with the award for Outstanding Contribution to the Marine Industry at last month’s 2025 #Seawork Awards. 🎉👏 ⚓

#Maritime #Yachts #Celebrating Success

[Warsash Maritime School @warsashmaritime]

We’re delighted to be welcoming 120 new #maritime officer #cadets to #SolentUni's #WarsashMaritimeSchool today – in what is our largest ever New Year cohort. 🎉

Please join us in wishing all our cadets the very best of luck! ⚓ 👏👏

[Massimo @Rainmaker1973]

17 equations that changed the world

[Massimo @Rainmaker1973]

You may not know that the derivatives of the position vector (x) with respect to time have interesting names:

Velocity (v) = dx/dt
Acceleration (a) = d²x/dt²
Jerk (j) = d³x/dt³
Snap (s) = d⁴x/dt⁴
Crackle (c) = d⁵x/dt⁵
Pop (p) = d⁶x/dt⁶

[Massimo @Rainmaker1973]

The Rhind Mathematical Papyrus is the oldest manuscript written in algebra and trigonometry, dating back to 3,550 years ago.

It shows that the Egyptians used first-order equations, geometric series and a second-order algebraic equation, related to the Pythagorean theorem a² + b² = c²

It also describes how to obtain an approximation of π accurate to within less than 1% and one of the earliest attempts at squaring the circle.

[Massimo @Rainmaker1973]

A brief history of physics

― Zach Weinersmith, 'Science: Abridged Beyond the Point of Usefulness'

[Massimo @Rainmaker1973]

How the world has evolved over the last century in terms of:

- Child mortality
- Life expectancy
- GDP
- Women's education
- Basic water source
- Basic sanitation

[📊 toddrjones]

[Larry the Cat @Number10cat]

Time to launch my manifesto:
1. Creation of a new meal between breakfast and brunch
2. If it's not sunny on a bank holiday everyone gets a rollover until it is
3. Legally declare that nostalgia isn't as good as it used to be
4. Rename the Isle of Dogs (it's actually a peninsula)
5. Rejoin the EU but let everyone who voted to leave pretend that we still have
6. Creation of a new meal between brunch and lunch

[Massimo @Rainmaker1973]

A brief history of physics

― Zach Weinersmith, Science: Abridged Beyond the Point of Usefulness

[Massimo @Rainmaker1973]

Don't waste precious experience only to prove someone else wrong.

[🎞️ Birdbox Studio]
https://t.co/ADx5yYKCYs

[Larry the Cat @Number10cat]

For friends around the world asking how the general election campaign in the UK is going: here's a video of a government minister calling a journalist who's live presenting news about a disastrous poll for the government. He hung up. 31 days to go...

[Massimo @Rainmaker1973]

#Today in 1936, Alan Turing submitted his ground breaking paper, «On Computable Numbers» in which he essentially conceived the modern computer on paper using mathematics before the technology existed to actually build it. He was 24.

[Massimo @Rainmaker1973]

Visualization of Euler's polyhedron formula:

V - E + F = 2

or

Vertices - Edges + Faces = 2

[🎞️ Beau Janzen / reason4math]
https://t.co/8Sc7I2BIq0

[Massimo @Rainmaker1973]

Clearing the sky with the wingtip vortices.

[Historic Vids @historyinmemes]

Rare sighting of the deep blue underside of a glacier during a collapse caused by glacier calving

[Professor James D. Knowles @VCSolentUni]

I was delighted to show Andy Haldane, Paul Kett & Julian Gray around our @SolentUni campus today. We house extensive facilities, from a Human Health Lab to a maritime simulation centre, and we discussed the ways Solent is advancing learning in HE as a TEF Gold institution.

[Solent University Newsroom @SolentUniNews]

Our University Librarian, @Amyodo @SolentUni has shared her expert insight into the use of library data for student success in a new article by @Wonkhe.

Want to learn more about how HE can better utilise library services? Read more⬇️

https://t.co/C4gGCFbgQG

[Have I Got News For You @haveigotnews]

Guests at Nigel Farage's 60th birthday party include former Prime Minister Liz Truss. She couldn't stay long – force of habit

[Have I Got News For You @haveigotnews]

Vladimir Putin has ordered a team of programmers to create a Russian software giant after Microsoft pulled out of the country. Bearing in mind the consequences of failure, none of them are particularly keen on using Windows