ultracritical

joined 2 years ago
[–] ultracritical@lemmy.world 6 points 1 week ago

Only really counts for feet and inches. But yes, having your base unit be divisible by halves, thirds, quarters, sixths, and twelths with whole numbers of sub units is highly useful when fabricating objects when you don't have access to modern tooling and supplies. In fact I would argue base 12 is the superior numerical system that was abandoned for metric and we have lost something in the meantime. Though Jan Misali might disagree with his love for sexinal.

Imperial units do have another advantage to this day, though. When talking about machining bolts and threads Imperial use threads per inch or threads per unit length while metric uses the pitch of the thread, so mm in-between threads. This decision means that when machining imperial nuts and bolts we by default pick whole numbers of threads per inch which due to the circular nature of lathes means that a simple clock dial can keep the lead screw synchronised with the head. Since metric uses pitch we pick numbers like 1.25mm pitch which does not always synchronous well with the lead screw and head and requires some odd gear ratios to cut specific threads.

[–] ultracritical@lemmy.world 1 points 1 month ago (1 children)

Signal protocol is what you're looking for. Started as text secure then changed name eventually. Whatsapp was never opensourced they just used the Text secure (now signal) protocol for their encrypted messages. They still allegedly use the signal protocol, I think, but with it being fully closed source and not implementing current signal feature for years afterwards.

In other words I have a high degree of faith our nuclear secrets will only be leaked to me when our DUI hires add me to the group, again using signal. But guarantee they're also leaked to the Zuck using whatsapp.

[–] ultracritical@lemmy.world 1 points 1 month ago (3 children)

More like WhatsApp is a Signal clone. Whatsapp uses the signal protocol for its encryption. Or at least it did until the Zuck took it closed source. It's still at least, in part, signal though.

Course Signal is still very barebones. Great for a secure messenger, but not as super featured like telegram. Would've been nice if they kept SMS compatibility though.

[–] ultracritical@lemmy.world 2 points 6 months ago (1 children)

Uranium is present in coal in high enough quantities that a coal plant releases more uranium to the environment then an equivalent nuke plant burns in its reactor, and mining for materials for solar panels creates literal mountains of thorium salts and other thorium contaminated debris.

Nuclear plants have the unfortunate position that they actually have to manage their nuclear waste due to its concentration. It's not actually hard to store the waste permanently from a technical perspective, it's just difficult to have the political will to actually do it.

[–] ultracritical@lemmy.world 11 points 6 months ago (2 children)

Be about 3x that number. Reactors are about 33-40% efficient. So a 1000 MW electric plant is running at 3000 MW thermal. Would be relatively easy too. Just a gigantic steam heated oven. So 7.5 million turkeys, enough to feed 90 million people or about a quarter of the US.

[–] ultracritical@lemmy.world 5 points 8 months ago

At 85 dB you'll have hearing damage from long term exposure without hearing protection. Normally considered 8 hours a day 5 days a week. So 2000 hours in a year. Higher sound levels have a lower threshold so shorter times. 120 dB is the threshold of pain, so immediate hearing damage. Also, dB are a 10x log scale. So every 10 dB is an order of magnitude increase. So the siren is actually about 3000x louder than when you should start wearing earpro.

[–] ultracritical@lemmy.world 4 points 8 months ago

Nah, FL5 Type 5 has hill assist, rev match, anti stall, and brake lock. With really comfy bucket seats. At speed you got Honda's bitchin adaptive cruise control and lane keeping assist. It's as comfortable as a manual car can be for commuting and traffic. 10/10 would recommend as daily driver.

[–] ultracritical@lemmy.world 12 points 11 months ago (3 children)

If you use "natural" or "organic" peanut butter (read, ingredients: peanuts) you'll want to refrigerate it. It helps keep the oil from separating. It'll be the consistency of jiff or other sugared brands for most of the jar. I usually take mine out of the fridge when you get towards the bottom so it doesn't get too hard.

[–] ultracritical@lemmy.world 1 points 1 year ago

Probably not. Too much alliteration. There is one from Angola to Brazil though!

[–] ultracritical@lemmy.world 16 points 1 year ago (1 children)

Since when has Quebec been in Europe?

[–] ultracritical@lemmy.world 4 points 1 year ago (1 children)

Not really. Radio power decreases with the square of the distance. So at if "blackout" is at 10 feet then at 100 feet your at 1% of your original power. So realisticly your blocking your GPS signal and partially obstructing signals for 2-3 cars adjacent to you and likely less than that. You wouldn't be reaching any planes without a lot of power and a big transmitter.

Planes avionics are more then sufficient to navigate and fly the plane without GPS. And planes will most definitely land without GPS as a.) GPS isn't the predominant tool for altimetry and b.) a plane has to land or it will crash. GPS is primarily used for navigation of routes and most critically for planning approaches and landings. It enables the tower to send an approach plan directly to a plane. So, really important for packing the skies with planes, but a malfunctioning gps unit isn't going to stop a plane from landing at its designated airport. May stop one from taking off though. This really only applies to big planes. Small planes don't always have gps and don't always land at airports using gps. Still really nice to have so you don't get lost, though.

Accurate GPS is a fairly recent luxury as until the 90s it was made inaccurate by design as only the military could access the full radio spectrum, and only recently has the full constellation of current gen sats been fully deployed. Also interestingly commercial gps receivers won't function beyond 600 mph and/or 60 000 ft to prevent people from using them for missiles. Military ones (in missiles) or if you home brewed it won't have this restriction though.

You are right though. Running a jammer is illegal as hell and you can really fuck other people's day. Especially do not try bring a jammer on a plane. They monitor radio very closely at and around airports. You will be caught and you will be sent to federal "pound me in the ass" prison.

[–] ultracritical@lemmy.world 2 points 1 year ago

It have suicide doors? God I miss those. Terrible for passenger safety, but I could fit so much stuff into my ion with those. Made moving with a sedan so much easier.

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