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sjducb

1,141 karma · joined July 17, 2021

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sjducb··on Tesla Roadster
The question of when to compress the air in the tank is an interesting one. Ideally you’d use the rockets for acceleration, breaking and cornering; which is all the time.

So probably the compressor will run all the time.

You’ll have to do a lot of modelling to work out the best time to use the rockets, my instinct is that fast cornering is the best use of the rockets. Maybe with a boost button to get you off the line fast at the beginning.

From the marketing materials it looks like straight line acceleration is being prioritised tho, so you charge the tank during braking and cornering.

sjducb··on Trump administration is suspending Microsoft from a green card program
Agreed, if a company wants to fill roles it advertises on linked in. Maybe the rules need updating.
sjducb··on Automatic Transmission – a data-privacy study of connected vehicles
> Additionally, without pretty extensive work there is no means of physically disabling the telemetry

My car has a fuse for the antenna module. You can remove this fuse to block all data transfer. Have a look at the fuse box diagrams for the minivans you are interested in.

sjducb··on Burning Man death rates – A short lesson in statistics
I find the rangers evolution into a proto police force fascinating.

It starts with being ready to help people who are having health crises. Then when a serious crime happens the community wants it to be investigated, and they call the only organised group that can help.

sjducb··on Tutoring company tells parents to save their money and 'use AI instead'
Alpha school struggles with the kids who are a bit slow.

If you’re the sort of kid who gets everything right first go then you join the “rocket ship” and spend 2hrs a day with AI then play for the rest of the day. You would do well in any school.

If you don’t get it right quickly then you join the “Pirate Ship” and have to spend all day grinding and obeying AI while your friends play. It seems pretty terrible.

https://buildcognitiveresonance.substack.com/p/fourth-report...

sjducb··on Tutoring company tells parents to save their money and 'use AI instead'
I’m learning French and I’ve tried both AI and a remote tutor from Cameroon.

The tutor from Cameroon is much better.

She tells me when I’m getting the basics wrong and designs lessons to go back and fix the basics.

AI loves to tell me how great I am and do lessons at the frontier of what I understand to make me feel good about how much progress I’m making.

sjducb··on Which tools do Claude, Codex and Cursor choose? We measured 17k runs to find out
I think OP means the existing open source ecosystem, things like the Python requests library.

There’s a real risk that AI kills contributions to traditional open source projects, and we all move to custom libraries written by our own AI.

sjducb··on Static Allocation, Constant Work
Why is a try/catch wrapper clutter but a switch case is not?
sjducb··on I think the military commissary's freezers were hacked
Manageable during peacetime.

In a war with another major power resources would be stretched thin and depriving bases of food would reduce combat effectiveness.

sjducb··on Ask HN: Do you know of any company that went back to hand-written code?
They go to meetings.
sjducb··on Ask HN: Do you know of any company that went back to hand-written code?
You absolutely can deny long term productivity gains.

Pre AI it took 100 engineers 5 years to get into a legacy code situation. Once you’re in a legacy code situation it’s very hard to add new features and your code is full of bugs. Fortunately most old companies with legacy code are making loads of money so they can pay the increased development costs to add features to their legacy code.

Now with AI five engineers can build a legacy codebase in six months.

sjducb··on Postmortem of a British Startup: Tract
That’s because big developers drip feed the houses onto the market…
sjducb··on Postmortem of a British Startup: Tract
Agreed, Thats why the planning system needs to change.
sjducb··on Postmortem of a British Startup: Tract
If you dump 100 new houses onto a small town you will cause a crash.

My town has a population of 15000 people, ~250 houses are sold per year and there is a development with permission to build ~400 new homes.

sjducb··on Postmortem of a British Startup: Tract
They get away with drip feeding because there’s no competition, because it’s really hard to get permission.

A simpler planning system would allow smaller developers to operate and they would buy, build and sell as fast as they can.

The reason big developers drip feed is that they have 100 identical houses in the pipeline so they don’t want the price to drop at all, because it affects the price of the houses in the pipeline.

The small developer sells quickly so that the cash is available for their next project.

sjducb··on Ask HN: What was the last task where only a frontier model could do it?
Coming up with good French grammar quizzes. GPT5.6 is noticeably better.

Older models usually pitch the difficulty too hard/easy and rely on me remembering the gender of words.

I’ve not noticed a big programming improvement with the newer models.

sjducb··on Africans Are Turning to Starlink
Agreed. All racism is wrong. Would you like to take back your “And rightfully so” comment, where you support explicitly racist laws?
sjducb··on Africans Are Turning to Starlink
There are lots of white South Africans. I believe musk is one. Starlink is majority owned by a South African.

The law isn’t about foreign/doneatic. It’s about black/white.

Increasingly this state authorised racism is now extending to black people. The violent ethnic cleansing against black Milawians by black South Africans is terrifying.

sjducb··on The primary purpose of code review is to find code that will be hard to maintain
Good programmers write code that’s so simple and obvious it looks like anyone could have written it.

Bad programmers make the simplest things really complicated.

sjducb··on Europe's resistance to AC is driving it insane
Installing AC feels like admitting defeat. 30 years ago we thought we could stop this thing. Our world leaders came together, listened to scientists and agreed targets.

Sadly we failed. Now I’m going to have to buy AC and make an even bigger contribution to global warming.

sjducb··on I used Claude Code to get a second opinion on my MRI
> Most people should have learned at a young age that absence of evidence is not evidence of absence.

I’m fairly sure that there are no lions in my house. Lions are quite large and I’m capable of detecting lion sized objects with my eyes.

To demonstrate that something is not present you first define the object, then come up with a test that will reliably detect the object. If the test comes back negative then the object is not there.

In a strict philosophical sense I cannot prove that there are no lions in my house, the external world might not exist! A hypothesis that no one has thought of might be correct and that hypothesis could show that there are invisible lions in my house!

However I intend to act with the certainty that there are no lions in my house. Because I have no evidence of lions in my house.

Absence of evidence is evidence of absence.

sjducb··on Ice water drowning survival of young patient (2025)
Guidance in the UK is that you always attempt CPR with children and continue it until you get to hospital. This is mostly for the family. They have the knowledge that you did everything you could, and when the child is pronounced dead in hospital the family have a lot of support available in the hospital setting.
sjducb··on UK to require ID or face scan before you can make social media accounts
I think there will be a 50%-80% reduction in social media use by teens. This is good enough.

There will always be people who get round the ban.

sjducb··on UK to require ID or face scan before you can make social media accounts
If you are unable to empathise with people who support the ban and dismiss them (and me) as idiots then your political action is unlikely to be successful.

Every dad I know who works in tech supports some kind of restriction on social media/smartphones for kids. The argument is how to do it, not whether we should.

sjducb··on UK to require ID or face scan before you can make social media accounts
You’re taking my argument to it’s extreme and giving it the least charitable interpretation.

I want it to not be normal to spend all day on TikTok. If something is illegal and underground then it’s much easier for me as a parent to ban it for my kids

sjducb··on UK to require ID or face scan before you can make social media accounts
Most parents will take that over letting HS Tikky Tokky have access to their 14 year old boy.
sjducb··on UK to require ID or face scan before you can make social media accounts
These laws exist because social media is extremely damaging to children, destroying their attention, exposing them to online bullying and extortion, and showing them horrific and traumatic content.

Can anyone suggest a better way of protecting kids, other than age verification?

People without teenagers often say that parents can restrict phone access and use parental controls. In reality most parents don’t do this because it’s very hard to get a teenager to accept something that is not “normal” in their friend group.

In a trade off between child protection and online freedom child protection will win.

sjducb··on Having your insulin pump die while you're on vacation
CPAP machines require a prescription in the UK.

https://www.hope2sleep.co.uk/cpap-machines-sleep-apnoea.html

Amazon is breaking the law by shipping one to you. I suspect there is very little enforcement of this law, which is why Amazon is unknowingly breaking it.

sjducb··on The Last Technical Interview
My experience with this is that contract is usually better paid than perm, so when it comes time to convert to perm I am not willing to take the pay cut so I go contract somewhere else, or remain with them as a repeat contractor.

HR usually stops my clients from hiring me perm at 2X the rate they pay their full time employees, despite the strong demonstration of competence that I’ve shown over the last few months.

My clients are usually unable to make permanent employment with them more appealing than repeat contracting with them.

sjducb··on The worst job interview I ever had
Because that would be a big pay cut for the friend. Contract day rates are higher than FTE day rates.
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