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decatur

6 karma · joined October 30, 2024

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decatur··on Mother convicted of: her 5 yo walks short way to pond alone in Virginia
In Atlanta 30 years ago a mother wanted to pick up pictures from the photo lab. Brought her son along. Police were waiting cos she took a picture of her son peeing. Things escalated when she resisted the police taking away her son.
decatur··on Repair Cafe – Fix Your Broken Items
Site is broken on my smartphone, won't navigate.
decatur··on Ask HN: What do SRE do at your company?
Produce hot air, check boxes, and 'see, I told you so'
decatur··on Horcrux – Distributed, Zero-Trust Secret Manager
The add pass command reads the password from the command line. Doesn't this open a completely avoidable attack vector.
decatur··on Show HN: Browser-based interactive 3D Three-Body problem simulator
Not really. Any solar system proves a kind of stability. And so does the famous KAM theorem. It states that a periodic solution is indeed quasi-stable under small pertubations. And yes, small sometimes is extremely small. But still stable. Imagine a sharp point with a tiny dent.
decatur··on Typst 0.14
We used GitHub/Azure markdown plus Mermaid plus MathJax for financial model documentation. Beyond a certain complexity this really hurts.

Now we use typst, both playground (which does not call home, so no document exfiltration) or the compiler. The compiler is super easy to install, as we already have the Rust build chain installed. Compared to Tex, the 40 odd years newer design of typst makes all the difference.

decatur··on JavaScript Temporal is coming
With any new DateTime object in any language I usually look at its persistent fields to judge what the memory and access characteristics are.

In case of Temporal it looks like that Chrome goes the JavaScript Date way as it only holds the timestamp:

extern class JSTemporalInstant extends JSObject { nanoseconds: BigInt; }

And then calendrical fields are computed on the fly. Is this correct?

decatur··on Watch the path of a raindrop from anywhere in the world
Dropped into Gulf of Mexico. Response: Finding downstream path from Unknown Territory
decatur··on Take the Pedals Off the Bike
Now we need a tutorial how to take the pedals off the bike. So you do not damage the crank because of the opposite threading left vs right.
decatur··on MIT study explains why laws are written in an incomprehensible style
Surely, your claim would only apply to contracts or court decisions, but not to laws.
decatur··on How We Got the Lithium-Ion Battery
> has fallen by more than 97% per kilowatt-hour

So how much did it fall per MWh?

decatur··on Cheap solar panels are changing the world
Power is king for commercial batteries. On whole sale energy markets you often see high prices in one 1/4 hour, and much lower prices 1 hour later. You can than nicely make an arbitrage profit if you completely cycle the battery. Also many such batteries have similar Max energy and power limits, e.g. 1.5MWh energy vs 1MW power.