David Siska

In Edinburgh they struggle to find each other. 🤣😕

No other European Capital would “re-open” a 5-lane city centre dual carriageway allowing thru access for public cars when it’s been restricted for years.

It should be “re-opened” with wider pavements, bigger bus stops and be for buses, taxis, bikes and pedestrians only.

A HUGE missed opportunity.

True, but for maths the paper also 100% is on arXiv so just force your search engine to find that copy.

I wonder when they’ll come to deal with all the double parked cars at Warrender Park / Marchmont Rd junction.

"it would require about 31 hectares of corn ethanol to produce the same amount of energy generated by one hectare of land covered in solar panels"
www.anthropocenemagazine.org/2025/04/new-...

graphics of cars with red text WE'VE MADE IT SO THAT AUTOMOBILES CAN GO LEVERYWHERE AT THE EXPENSE, OF CHILDREN GOING

the cost of doing business.

‘We need to reclaim childhood’: UK ministers urged to restore right to play A steady erosion of outdoor playtime is impairing the development of infants, say experts

“Children’s worlds have shrunk enormously over the last 50 years… We need to reclaim childhood.”

> More than 80 per cent of 55- to 64-year-olds said they regularly played out on the street and had freedom to explore when they were young, compared with only a quarter of children today.

Announcing : The 2nd International Summer School on Mathematical Aspects of Data Science
mathsdata2025.github.io
EPFL, Sept 1–5, 2025

Speakers:
Bach @bachfrancis.bsky.social
Bandeira
Mallat
Montanari
Peyré @gabrielpeyre.bsky.social

For PhD students & early-career researchers
Apply before May 15!

Training "courses" that have to be completed regardless of someone's competence on "IT security" and "unconscious bias". And then some more forms.

And that's before we get into the madness that is the peer review system that has been subverted into cash cows for Springer and Elsevier.

Simple things like booking conference travel now accompanied by risk assessment forms (for a conference in Paris or Oxford)... and booked via strange, inefficient agencies. Laptops for work centrally managed adding a layer of inflexibility for doing research.

Very much true from what I've seen personally and heard from colleagues. Endless forms. Pointless meetings. Flexibility removed from teaching design / delivery by well meaning but finally destructive rules. Students treated as children in pursuit of heeding their "feedback" and improving NSS.

'The Anti-Democratic Tyranny of the Office For Budget Responsibility' A decades-long trend of outsourcing democratic decisions to unaccountable institutions like the OBR is leading Britain towards ruin, argues Neal Lawson

🔴‘The Anti-Democratic Tyranny of the Office For Budget Responsibility’

A decades-long trend of outsourcing democratic decisions to unaccountable institutions like the OBR is leading Britain towards ruin, argues Neal Lawson

bylinetimes.com/2025/04/04/t...

A map of the rat run

The classic “George Watson’s” rat run, which is currently severed by modal filters at Braid Ave. The council plan to reopen* this rat run, thereby effectively closing it to children walking, wheeling and cycling

Shameful stuff, that goes against all council policy

The road junction of Whitehouse Loan and Strathearn. There are 3 large wooden planters on the street l, with young plants in them. The temporary “road open to pedestrians, wheelers and cycles” sign remains in front, as does the official no motor vehicles sign. It is a sunny dry day

We now have super new planters at the traffic filter on Whitehouse Loan! Looks so much better

Thank you
@edinburghcouncil.bsky.social
@cllrbenparker.bsky.social
@stephenjenkinson.bsky.social

Bluesky seems to be where it’s at.

The La Crosse Tribune, July 08, 1924

Why we need more than “timed closures” outside schools.

Streets come alive when opened to people

Where is the voice of the children in the debate on this?

Madrid did this in 12 years! This is the same timeframe it takes Edinburgh to build…

…one (1) segregated cycle lane 🤔

When councillors sit smugly on their bums, prevaricating, delaying & filibustering, they are FAILING the people of Edinburgh

Fractional Brownian motion, varying the Hurst parameter H between 0 and 1. H=0.5 corresponds with standard Brownian motion, and the path has fractal dimension 2-H

Lunar eclipses, such as the one yesterday, were one of the earliest pieces of scientific evidence that the Earth was basically a round sphere, already known to Aristotle: regardless of the position of the eclipse in the light sky, the shadow of the Earth on the Moon was always circular.

I don’t think they realise that “blame Canada” was a joke not advice im South Park.

Probably not too big of a deal that right now there's the least amount of ice on our planet's surface in recorded human history

From what I’ve seen mainly a stepping stop to synthetic hydrocarbons (synthetic jet fuels long term energy storage as storing hydrogen itself is a pain - tiny molecules). Then there are bunch of industrial processes (ammonia) that need it (but can’t find link) even steel production.

Some key insights from the UK Climate Change Committee’s Seventh Carbon Budget What would it take for the UK to get to net-zero by 2050?

In my Substack today I look at some of the key insights from the UK Climate Change Committee's Seventh Carbon Budget.

www.sustainabilitybynumbers.com/p/uk-ccc-sev...

Great to hear hydrogen heating is gone. Hydrogen will have its place … just not in heating. That was silly.

An unfinished bridge with a gap Text "WE'RE NOT SEEING DRIVERS USING THE NEW BRIDGE WE BUILT CONNECTED NETWORKS ARE JUST AS IMPORTANT FOR PEOPLE ON BIKES AS THEY ARE FOR THOSE DRIVING

The Bridge.

Creative done with @thebikinglawyer.bsky.social

That would be such a cheap win for so much of Edinburgh. It would need maybe removing some parking near junctions so that cyclist enter them with unobstructed view of traffic and seen.

The danger of car doors is still there but at least you don’t get thrown under the passing traffic.

Volume estimates for unions of convex sets, and the Kakeya set conjecture in three dimensions We study sets of $δ$ tubes in $\mathbb{R}^3$, with the property that not too many tubes can be contained inside a common convex set $V$. We show that the union of tubes from such a set must have almos...

I am happy to announce that the Kakeya set conjecture, one of the most sought after open problems in geometric measure theory, has now been proven (in three dimensions) by Hong Wang and Joshua Zahl! arxiv.org/abs/2502.17655 I discuss some ideas of the proof at terrytao.wordpress.com/2025/02/25/t...

I completely agree, of course. I have literal piles of papers on my shelves containing false starts, erroneous calculations and abandoned drafts. I can't see how that can be anything but waste according to their definition, but without it none of my published research would exist