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adamjb

934 karma · joined June 22, 2020

strategic transport modelling consultant, among other things
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adamjb··on The two Christian saints who are the Buddha
We have records of versions of the story being repeated as it travelled from South Asia to the Mediterranean and the name slowly changing from bodhisattva -> bodisav -> Būdhasaf -> Iodasaph -> Ioasaph -> Josaphat
adamjb··on Using the railway network as a flatbed scanner
Not quite in the same spirit but I suppose one could talk of railway operators using the railway network as a flatbed scanner when they send maintenance vehicles out to scan the railbed for defects.

For example: https://railgallery.wongm.com/ev120-inspection-vehicle/F144_... https://www.youtube.com/watch?v=5TKDw2E_PBQ

adamjb··on US President hid in catering cart for secret flight in Turkey amid Iran threat
Echoes of Nissan CEO Carlos Ghosn smuggling himself from Japan in a music equipment box while on bail for financial crimes

https://www.bbc.com/news/business-57760993

adamjb··on CoMaps – FOSS Offline Maps
CoMaps remembers the zoom and position of your last session and returns there on launch
adamjb··on Spain blocks prediction markets Polymarket, Kalshi over lack of gambling licence
That already had a name

https://en.wikipedia.org/wiki/Betting_exchange

adamjb··on My Experience as a Rice Farmer
>My one hope for AI, robotics, self driving cars, is that they can enable more people in cities to migrate back to rural places

Ah, the perennial dream of the technologist. Here's a Le Corbusier quote on the same theme from 100 years ago

> The cities will be part of the country; I shall live 30 miles from my office in one direction, under a pine tree; my secretary will live 30 miles away from it too, in the other direction, under another pine tree. We shall both have our own car.

adamjb··on Los Angeles ends strange rite of passage with new fridge law
It's interesting how there's a negative correlation between tenant's rights and how furnished a rental is expected to be.
adamjb··on Axial twist theory
>axial twist orthodoxy

My impression is that this isn't exactly settled science. If you look in the history for the article you can see that it's mainly written by the lead author of the main citations. He also did the cute illustrations that everyone loves

https://commons.wikimedia.org/wiki/User:Marci68

adamjb··on The design philosophy of Great Tables
Is it this, from Matthew Butterick?

https://practicaltypography.com/grids-of-numbers.html

adamjb··on What flying was like fifty years ago
No one checks names on Aussie domestic flights to this day
adamjb··on Critical Gitlab vulnerability exposes 2FA-less users to account takeovers
>how can you find what version of Gitlab is being run? (through the web interface on a CE instance)

It's up the top at gitlab.example.com/help

adamjb··on Lionel Messi Is Impossible (2014)
One of the reasons Schumacher was able to dominate was that he was one of the first F1 drivers to train for it as a physical sport.
adamjb··on High Court of Australia rules hyperlinking is not publishing [pdf]
The laws in Australia refer to "facilitating" copyright infringement. Whether or not a torrent website is a publisher is entirely immaterial
adamjb··on Ask HN: Why did smartphones become a single point of failure?
My workplace's solution was to simply turn off 2FA for my account
adamjb··on Citroen 2cv pages
2CV's do around 6L/100km which is comparable to modern town cars
adamjb··on How far can you go by train in 5h?
Fascinating how clearly you can see this with the 5hr limit from Dusseldorf being pretty much exactly the French border from the Atlantic to Switzerland
adamjb··on Omyyyy/pycom: A Python compiler, down to native code, using C++
>>How does it handle type instability, i.e. when the type of a variable is only known at run-time, not at compile-time?

>c++’s extremely convenient ‘auto’ keyword :)

https://www.reddit.com/r/Python/comments/w7vlim/i_made_a_pyt...

adamjb··on The fall of Reddit: Why it’s quickly declining into chaos
The redesign was in 2018 so I'm not sure about that timeline
adamjb··on CityEngine: Build a Digital Twin of Your City
MATSim or ActivitySim are used for that sort of thing. Most modellers don't bother to simulate every individual person though. Instead they use a sample which they scale up because it isn't worth the order of magnitude more computing time when just simulating a representative 10% does fine.
adamjb··on CityEngine: Build a Digital Twin of Your City
Digital twins aren't simulations, they're just data. The idea is that it's openly available and easily queryable so that people have good data to run their models and simulations on.
adamjb··on Airbnb Q1
I find this to be an unintuitive metric, as nights that are part of longer bookings are oversampled as there are more nights in longer bookings
adamjb··on Ask HN: Teach me something new
Useless outside the US? Ignoring the obvious objection, one of the design goals of the initial iteration of the NATO/ICAO phonetic alphabet was that every word in it would be familiar to you as long as you were fluent in either English, French or Spanish.
adamjb··on Video: Why Open Data Matters for Cycling: Visualizing a Cycling City
cycle.travel incorporates real traffic data as part of its routing
adamjb··on Polar Express – How Airlines are plotting a new-route to Asia
They successfully tested landing and taking off a loaded C-130 from a carrier in the 60s so I guess if you designed a new long range STOL airliner from the ground up it wouldn't be impossible and might even have a slim slim chance of being economical. But existing airliners, no way. And with the risks of carrier operations I don't reckon it'd be anywhere near as safe as 6 hour ETOPS.

https://www.youtube.com/watch?v=ar-poc38C84

adamjb··on Goldilocks Zone Finder – Find your ideal climate
Australia's Bureau of Meteorology calculates apparent temperature like this

AT = Ta + 0.33×e − 0.70×ws − 4.00

where:

Ta = Dry bulb temperature (°C)

e = Water vapour pressure (hPa) [humidity]

ws = Wind speed (m/s) at an elevation of 10 meters

The vapour pressure can be calculated from the temperature and relative humidity using the equation:

e = rh / 100 × 6.105 × exp ( 17.27 × Ta / ( 237.7 + Ta ) )

where:

rh = Relative Humidity [%]

http://www.bom.gov.au/info/thermal_stress/#atapproximation

adamjb··on How to skate a 10k
It was very normal for those in the Elite Athlete program at my uni to refer to themselves as elite athletes
adamjb··on Row erupts over wreck in US waters identified as Captain Cook’s Endeavour
OP posted it with the original headline

https://web.archive.org/web/20220203013548/https://www.thegu...

They submitted at 2022-02-03T03:09:31 [0] but this post got re-upped by the mods, as they sometimes do for submissions they feel deserve a second chance [1]

[0] as you can confirm by mousing over where it currently, erroneously, says "3 hours"

[1] https://news.ycombinator.com/item?id=11662380

adamjb··on Man found guilty of ‘grossly offensive’ tweet
On New Year's Day 1942 the Allies declared they were fighting "to defend life, liberty, independence and religious freedom, and to preserve human rights and justice"

https://en.wikipedia.org/wiki/Declaration_by_United_Nations

adamjb··on Wordle-solving state of the art: all optimality results so far
Been there, done that!

https://news.ycombinator.com/item?id=30045487

adamjb··on Optimal coverage for Wordle with Monte Carlo methods – Part III
Here are the rest of the 25 letter sets, found using brute force with the same 1 vowel per word with no repeated letters trick.

  [['brung', 'waqfs', 'vozhd', 'cylix', 'kempt'],
   ['brung', 'waqfs', 'vozhd', 'xylic', 'kempt'],
   ['jumby', 'waqfs', 'vozhd', 'clipt', 'kreng'],
   ['jumby', 'waqfs', 'vozhd', 'pling', 'treck'],
   ['jumby', 'waqfs', 'vozhd', 'prick', 'glent'],
   ['jumpy', 'waqfs', 'vozhd', 'bling', 'treck'],
   ['jumpy', 'waqfs', 'vozhd', 'brick', 'glent']]

I was a little inspired by this thread [0] about the practicality of implementing brute force algs in pure python for solving wordle. Using only built-ins and with a bit of optimisation [1] it runs in 4 minutes single threaded in cpython.

[0] https://twitter.com/eevee/status/1484716294179934209

[1] Instead of considering every possible combination, it discards non-optimal subsets. E.g. when considering o-words, only u- and a-word combos that already cover 10 letters are looked at. This significantly dampens the combinatorial explosion

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