hwillis

27 ms·

301.
by hwillis 3y ago
Photoplethysmogram devices like this measure blood volume. That works great for your heart rate. It is pretty terrible for your blood pressure. In theory they measure the speed an artery expands as blood passes. 1. Since they can't
302.
by hwillis 3y ago
No- diabetes can have very negative long term impacts on your small blood vessels, particularly in your kidneys. Changes in blood pressure from vascular damage all over your body can be a signal that nephropathy (kidney disease) is not far
303.
by hwillis 3y ago
Potassium and sodium are also excreted together, so decreasing sodium/increasing potassium typically results in beneficial impacts on the other. > Doctors get very tense about potassium supplementation in fear of hyperkalemia. Suppl
304.
by hwillis 3y ago
Hmm, fair enough. It is possible to measure BP at the ankle (while lying down, legs flat), although it is usually higher. If you do want to test it yourself, that's an option. Your doctor probably won't really want to bother bu
305.
by hwillis 3y ago
dizziness can also be a symptom.
306.
by hwillis 3y ago
Ever run real hard and felt your heartbeat in your ears? Like that but always. It can also happen if you have valve or other heart defects that cause enlargement, but that isn't loud in your ears. It's just so loud in your ches
307.
by hwillis 3y ago
Definitely does not sound straightforward given all the things they tested and excluded. It also very atypical and medicating specifically for this would be unusual. That said it sure sounds like it perfectly treats the root problem. If y
308.
by hwillis 3y ago
ty, edited. oopsies!
309.
by hwillis 3y ago
> You would think that something like blood pressure would be highly regulated in the body Counterpoint: a 6' (1.83 m) tall column of blood has a pressure of 142 mmHg at the bottom- higher than your normal blood pressure. When you
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by hwillis 3y ago
invasive?
311.
by hwillis 3y ago
Raynauds?
312.
by hwillis 3y ago
> so nobody measures it as frequently as they do their pulse. Once we have the technology to accurately and passively measure blood pressure throughout the day It's surprisingly tricky. The way a BP cuff works (the auscultatory met
313.
by hwillis 3y ago
couldn't even read to the second paragraph?
314.
by hwillis 3y ago
>> I can bring 100L gasoline with me to add 1000 km range on top of existing 500 range > This is the big advantage. No, absolutely not. Who brings 160 lbs of gasoline with them anywhere? That's twice as much as an average ca
315.
by hwillis 3y ago
> I'm not sure, but I expect that I don't have to change oil every year in an electric car The only critical replacement is brake calipers and fluids: https://www.tesla.com/ownersmanual/modelx/en_eu&#x
316.
by hwillis 3y ago
> It’s surprising to me that regulators allow this to be kept a trade secret. The FDA protects trade secrets and more broadly "any commercially valuable plan, formula, or device". Just because something is a trade secret doesn
317.
by hwillis 3y ago
there are also no rare earths in batteries. There are rare earths in computers (the same kinds in regular cars) and in neodymium magnets. lithium is not a rare earth element.
318.
by hwillis 3y ago
so the same kind of "common knowledge" that says daddy longlegs have lethal venom but can't break human skin. Got it.
319.
by hwillis 3y ago
> As is often pointed out on HN, electrical cars are substantially heavier Often asserted, rarely backed up. A LR Model 3 weighs 4000 lbs. A Chevy Bolt weighs 3600 lbs. An AWD Camry weighs 3600, an Audi S3 weighs 3500. It's ~15%
320.
by hwillis 3y ago
It's in the range of femtoamps. Current in general is not really very directly measurable, particularly for biology. Instead you do things like measuring voltage across something or magnetic fields.
321.
by hwillis 3y ago
There aren't any batteries or electricity here. There's just copper wire. There's no appreciable electric field, just a wire that is at best absorbing some ambient radio waves and heating up incredibly slightly.
322.
by hwillis 3y ago
A wire will cause the air around it to assume the same potential, ie the same as air that is low to the ground. If you are 6" above the top of the wire, the voltage to ground will be the same as 6" above the ground. Note that the
323.
by hwillis 3y ago
Roads also break down on their own, though. The large majority of roads will see very little or no semi traffic, and their upkeep is entirely for the sake of light vehicles. In the north, where freeze-thaw costs much more, the impact of tr
324.
by hwillis 3y ago
That doesn't work. The biggest battle ever in EVE online[1] had 2,670 players in a single system. The server is chugging through movement/actions/collisions for a few thousand objects, almost all of them not touching and jus
325.
by hwillis 3y ago
Star Citizen is trying to handle physics for objects in stations/planets/ships, debris, asteroids etc. A couple orders of magnitude more objects, I think. Note that I don't play or follow either game, but I think you're
326.
by hwillis 3y ago
DJIs biggest drone is over 1m wide and can carry a 6 kg payload. If you could make a suitable receiver that weighed 6 kg or even 600kg, you could just suspend it from motorized plastic cables on space frame towers. Drones aren't going
327.
by hwillis 3y ago
http://sam.zeloof.xyz/first-ic/ This is one of the things where the details of the "booting civilization" situation matter a LOT. If you can find a Blu-ray player, it'd be much easier for you to make so
328.
by hwillis 3y ago
> As in, it's more likely you get a dead pixel on a larger screen. Aside from the ink capsules and higher voltage (though still very low), E ink is almost identical to LCD and probably slightly easier to make. There's a TFT (w
329.
by hwillis 3y ago
If you knew what DNA was and had seen a protein you could easily figure out start/stop codons. If you had only seen something similar it would be harder. If you had nothing similar, I don't know. Coding DNA and non-coding DNA lo
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by hwillis 3y ago
> But you can only know that by having a large sample of very “stable” (have few genetic irregularities) gene samples compared to a large pool of samples from people with very narrow and pronounced gene irregularities, right? No- A &quot

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