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cameldrv commented on The first sodium-ion battery EV is a winter range monster   insideevs.com/news/786509... · Posted by u/andrewjneumann
decimalenough · 9 hours ago
Unfortunately sodium ion is less dense than lithium ion, so range is lower too.

Since it's also cheaper, it's likely that Na-ion will be adopted by cheaper city runabout type EVs, while premium long range EVs will continue using Li-ion.

cameldrv · 9 hours ago
I saw a CATL presentation where they were hyping a hybrid lithium-sodium pack. Their version of sodium ion could charge/discharge faster than LFP, and handle lower temperatures. The hybrid then gives you a nice combination of features. You get better density/range from LFP, but if you have to start in the cold, the sodium-ion can get you going, and then with active cooling you can heat the LFP using the waste heat from the sodium ion for the rest of the trip. Since the sodium ion charges faster, you can charge part of the overall pack really fast, so you can make a quick trip to the charger and add ~50%. If you live in a cold climate area it seems like a very good combination.
cameldrv commented on The first sodium-ion battery EV is a winter range monster   insideevs.com/news/786509... · Posted by u/andrewjneumann
kalenx · 10 hours ago
Considering air resistance is proportional to the cube of the speed, it would be highly surprising to not be the case.
cameldrv · 9 hours ago
It goes with the cube in terms of power, but with the square in terms of energy/distance, which is usually what you'd care about.
cameldrv commented on I'm going to cure my girlfriend's brain tumor   andrewjrod.substack.com/p... · Posted by u/ray__
ahhhhnoooo · 2 days ago
I'm... concerned for the health of this man. I appreciate his dedication, but I read a level of love that's pressing past caring for the human and into beating yourself up.

Did she ask you to cure this tumor? Did she ask you to post about it?

This is a common story in disability and chronic illness communities -- a partner gets so fixated on the illness they forget the human afflicted with it. The ill partner goes to the grave wishing their partner would stop fighting and start just spending their remaining time filling their lives with joy.

It leads to especially dark places when they don't succeed.

I wish him all the best, but don't lose sight of the human suffering the illness and what they want.

cameldrv · 2 days ago
I think that for an average person a few years ago, probably there’s nothing meaningful they could have done.

For a smart VC with some money and with some knowledge of biology and willing to put in some hours, and with a disease that is “on the bubble”, i.e. not a slam dunk for modern medicine, but also not a death sentence, that there’s a decent chance that he can meaningfully improve the outcome.

I also see what you’re saying about the vibe and making it about himself, but that’s also helping him get attention… here we are talking about it. With more attention he’s going to get more skilled people helping her out.

cameldrv commented on FORTH? Really!?   rescrv.net/w/2026/02/06/a... · Posted by u/rescrv
rescrv · 3 days ago
Looking to discuss with people about whether LLMs would do better if the language had properties similar to postfix-notation.
cameldrv · 2 days ago
Even though I really like postfix from an elegance standpoint, and I use an RPN calculator, IMO it's harder to reason about subexpressions with postfix. Being able to decompose an expression into independent parts is what allows us to understand it. If you just randomly scan a complex expression in infix, if you see parenthesis or a +, you know that what's outside of the parenthesis or on the other side of a + can't affect the part you're looking at.

If you're executing the operations interactively, you're seeing what's happening on the stack, and so it's easy to keep track of where you are, but if you're reading postfix expressions, it's significantly harder.

cameldrv commented on Tesla’s autonomous vehicles are crashing at a rate much higher tha human drivers   electrek.co/2026/01/29/te... · Posted by u/breve
tsimionescu · 10 days ago
All of your arguments are expounded upon in the article itself, and their conclusions still hold, based on the publicly available data.

The 3x figure in the title is based on a comparison of the Tesla reports with estimated average human driver miles without an incident, not based on police report data. The comparison with police-report data would lead to a 9x figure instead, which the article presents but quickly dismisses.

The denominator problem is made up. Tesla Robotaxi has only been launched in one location, Austin, and only since July (well, 28th June, so maybe there is a few days discrepancy?). So the crash data and the miles data can only refer to this same period. Furthermore, if the miles driven are actually based on some additional length of time, then the picture gets even worse for Tesla, as the denominator for those 9 incidents gets smaller.

The analysis indeed doesn't distinguish between the types of accidents, but this is irrelevant. The human driver estimates for miles driven without incident also don't distinguish between the types of incidents, so the comparison is still very fair (unless you believe people intentionally tried to get the Tesla cars to crash, which makes little sense).

The comparison to Waymo is also done based on incidents reported by both companies under the same reporting requirements, to the same federal agency. The crash definitions and reporting practices are already harmonized, at least to a good extent, through this.

Overall there is no way to look at this data and draw a conclusion that is significantly different from the article: Tesla is bad at autonomous driving, and has a long way to go until it can be considered safe on public roads. We should also remember that robotaxis are not even autonomous, in fact! Each car has a human safety monitor that is ready to step in and take control of the vehicle at any time to avoid incidents - so the real incident rate, if the safety monitor weren't there, would certainly be even worse than this.

I'd also mention that 5 months of data is not that small a sample size, despite you trying to make it sound so (only 9 crashes).

cameldrv · 9 days ago
Statistically 9 crashes is enough to draw reasonable inferences from. If they had the expected human rate of 3 over the period in question, the chance that they would actually get into 9 accidents is about 0.4%. And mind you, that’s with a safety driver. It would probably be much worse without one.

Deleted Comment

cameldrv commented on Waymo robotaxi hits a child near an elementary school in Santa Monica   techcrunch.com/2026/01/29... · Posted by u/voxadam
alkonaut · 11 days ago
And before the argument "Self driving is acceptable so long as the accident/risk is lower than with human drivers" can I please get that out of the way: No it's not. Self driving needs to be orders of magnitude safer for us to acknowledge it. If they're merely as safe or slightly safer than humans we will never accept it. Becase humans have a "skin in the game". If you drive drunk, at least you're likely to be in the accident, or have personal liability. We accept the risks with humans because those humans accept risk. Self driving abstracts the legal risk, and removes the physical risk.

I'm willing to accept robotaxis, and accidents in robotaxis, but there needs to be some solid figures showing they are way _way_ safer than human drivers.

cameldrv · 11 days ago
That’s an incentive to reduce risk, but if you empirically show that the AV is even 10x safer, why wouldn’t you chalk that up as a win?
cameldrv commented on The behavioral cost of personalized pricing   digitalseams.com/blog/the... · Posted by u/bobbiechen
gruez · 14 days ago
>A lot of the theoretical underpinnings about why capitalism is a good system are based on the law of one price.

Why? Competition for instance, works fine even with price discrimination, because bidders will still compete with each other on offering the lowest price.

cameldrv · 13 days ago
In the context of an oligopoly, normal pricing pressures break down, especially in real world conditions where price fixing is rampant.
cameldrv commented on I let ChatGPT analyze a decade of my Apple Watch data, then I called my doctor   msn.com/en-us/news/techno... · Posted by u/zdw
cameldrv · 13 days ago
I dunno, if the Apple Watch said he had a vo2max of 30, that probably means he can’t run a mile in less than 12 minutes or so. He’s probably not at all healthy…
cameldrv commented on The behavioral cost of personalized pricing   digitalseams.com/blog/the... · Posted by u/bobbiechen
cameldrv · 14 days ago
A lot of the theoretical underpinnings about why capitalism is a good system are based on the law of one price. Especially in the context of an oligopoly, being able to price-discriminate on such an individual level leads to really bad outcomes.

u/cameldrv

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