rklaehn

21 ms·

241.
by rklaehn 6y ago
Does it matter if it is revolutionary? A lot of things that tesla does are not revolutionary but a very large number of small improvements that end up resulting in a qualitative change. E.g. everybody is talking about exotic battery chemist
242.
by rklaehn 6y ago
If US and EU are so buerocratic that innovation is impossible, there will still be a big market for viable VTOL electric planes in the rest of the world. Just like most 3rd world countries these days have better 4G coverage than supposedly
243.
by rklaehn 6y ago
This is a global constellation. The initial orbital planes are arranged so that the density of satellites is maximized in middle latitudes, where most of the affluent world population lives. With a LEO constellation, unlike GEO, you can not
244.
by rklaehn 6y ago
I kinda share your kneejerk reaction about nodejs for foundational tools, even though I must admit that dat/hyperdrive works surprisingly well for a js tool. But dat/hyperdrive is a well-documented protocol, and there are several
245.
by rklaehn 6y ago
Quick note: it would be nice to ship the hyperdrive daemon as something more self-contained than a npm package. I tried to install it and got some c compile errors. Probably my nodejs version is too old, but you want to have the absolute mi
246.
by rklaehn 6y ago
Yes, I saw the compressed bitfields. Most amount of bit twiddling I have ever seen in a pure javascript library... Being able to identify a piece of content by an integer instead of a hash makes things more efficient compared to content-add
247.
by rklaehn 6y ago
So do you opportunistically gather info about what other peers have via this gossip protocol, or just when you need something? I had looked at https://datprotocol.github.io/how-dat-works/ , but I don't remember an
248.
by rklaehn 6y ago
Congrats for the release. Mostly familiar with IPFS, but learned about DAT at dtn.is last year. The hypercore protocol is pretty well designed and documented. How would hyperdrive deal with the following scenario: you got a large dataset su
249.
by rklaehn 7y ago
Once the capacitor plate has a voltage in the range of the kinetic energy of the particles, this is exactly what will happen. The particles convert their kinetic energy into electrical energy by rolling "uphill" against the electr
250.
by rklaehn 7y ago
There are lots of ways to get better efficiency for this process. One is to store the heat of compression in a gravel bed for use when evaporating the liquid air again. Another way is to use waste heat from an industrial process to evaporat
251.
by rklaehn 7y ago
Why would it matter how big the plane is? For a certain battery energy density and battery mass fraction, you should get a certain range, no matter what the size of the plane is. If anything, large planes should be a bit more efficient. I t
252.
by rklaehn 7y ago
Been there, done that... :-)
253.
by rklaehn 7y ago
The hash set and hash map for scala are actually based on hash tries, but with a non-cryptographic hash, so collisions still need to be handled. I wrote efficient set operations for scala.collection.immutable.HashSet once. Lots of bit-twidd
254.
by rklaehn 7y ago
Yes, saw that one. Neat. My stuff is even simpler. It is just a flat array in memory and should just not be used when you want random single element inserts or deletions. But I find that rather uncommon anyway in many use cases. I made su
255.
by rklaehn 7y ago
> I agree, but instead I would use the term "path-dependent" for hash tables rather than "non-deterministic" because, after all, unless you salt your hash functions, there is really no randomness anywhere. What you th
256.
by rklaehn 7y ago
Databases use hashes all the time, also ordered indexes are very frequently used in programming (e.g. C++ stl). I think ordered indexes are a good default for use in programming languages. They are deterministic and do not have strange corn
257.
by rklaehn 7y ago
We currently looking for a powerful query language for a distributed event sourcing system. It would have to be embeddable in rust. Is there a site where I can see more complex datalog queries and how they compare to other query languages?
258.
by rklaehn 7y ago
> “Implementing” (with big scare quotes) algebraic structures by essentially implementing what appear to be “interfaces” (or traits or type classes or ...) might give you a brief “aha!” about what an abstract algebraic structure is on th
259.
by rklaehn 7y ago
Looks very nice and straightforward. Otherwise, seems similar to alga: https://docs.rs/alga/0.9.2/alga/
260.
by rklaehn 7y ago
They lost me when they added indexed properties for better office interop, yet neglected core CLR runtime performance optimisations like struct inlining for several years.
261.
by rklaehn 7y ago
Pinning services are nice, but the idea of pinning services is a bit antithetical to the basic philosophy of p2p. If the only way to make something available is e.g. putting something on pinata, I might as well put it on S3. The basic probl
262.
by rklaehn 7y ago
The sad thing that just the two parameters basic income and flat tax rate are flexible enough for a wide variety of policies. Want scandinavian style socialism: set the basic income very high and have a high flat tax rate of maybe 50%. Want
263.
by rklaehn 7y ago
In germany it is even worse. The tax rate is highly progressive, topping off at 50,5%. But the additional social security and penson payments are capped, so above a certain wage you actually pay less in total for social security, pension an
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by rklaehn 7y ago
I was a huge fan of this concept. It has been invented independently by people on the right (Milton Friedman) and the left. But unfortunately that is not how politics works. Politics is selling a particular group an advantage over the major
265.
by rklaehn 7y ago
Write a simulation where you have n entities with an equal amount of resources. Now choose two entities at random and let them "trade", where the outcome is random but fair. You will get a "wealth distribution" that is n
266.
by rklaehn 7y ago
On the contrary: you always target exactly "the guy earning 250k/y". Because people earning a lot of money but still earning through work are the easiest to target, since they can not just move somewhere else easily.
267.
by rklaehn 7y ago
Stainless steel is not some magic adamantium that is completely unbreakable. You can choose thinner steel for the part that is designed to crumple, and it will crumple or fold as intended, just like any other material. I would guess that th
268.
by rklaehn 7y ago
This is just silly. There were not many pictures of it, but the truck has a massive frunk. This frunk will just be designed to crumple and adsorb the impact from a front collision. The structural frame will not extend all the way to the fro
269.
by rklaehn 7y ago
> But obviously they are dwarved by the single commuters, or else the average wouldn't be 1.4 persons per car. Well, 1.4 persons per car is already quite a bit higher than your original claim of "at least 2500kg of material to
270.
by rklaehn 7y ago
> A model X is 2500kg, a model S is 2100 kg. It is also about twice as big as a typical European car. Even a model 3 is on the big side. The most produced electric car by tesla is the model 3, which is much lighter. 1611kg, not even that

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