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rtkwe

13,295 karma · joined May 2, 2012

[ my public key: https://keybase.io/tswaugh; my proof: https://keybase.io/tswaugh/sigs/r8gvFEWW4PGsNVwDzVbL9XF8kfIL3wRD41oq7k48q24 ]
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rtkwe··on Tom Stanton's supersonic trebuchet breaks sound barrier with gravity alone
Why? The release angle is fully controlled by design of the mechanism if you wanted to fire it into the ground for safety you could just advance the release timing by a few degrees.
rtkwe··on Tom Stanton's supersonic trebuchet breaks sound barrier with gravity alone
It is because the main limitation for high speed digital video is the bandwidth of the pipeline from sensor to storage. Lowering the resolution increases the number of frames you can shove through the X Gbps pipe between the photons hitting the sensor and the highspeed memory the camera is buffering into.
rtkwe··on Tom Stanton's supersonic trebuchet breaks sound barrier with gravity alone
No it wouldn't... the projectile is still launched by the same angular motion of an arm and a sling basket the power for the rotation just comes from a different source.
rtkwe··on Tom Stanton's supersonic trebuchet breaks sound barrier with gravity alone
No it's an old unit that's stuck around in the firearm world in basically every country. EU bullet makers specify their bullet weights in grains too.
rtkwe··on Supersonic Trebuchet [video]
He talks about reducing the drag by improving the aerodynamics of various components and got a 17.8% increase in it's RPM with just a leading edge profile and wrapping it in mylar.

The big issue in your proposed version is building an arm that is light enough to not absorb a lot of energy (it still needs to be rotating at the same speed as the progressive version in the video) but rigid enough to survive that sudden acceleration. My bet is you'd lose way more to the arm flexing and the added weight than you would the benefit of not dealing with aerodynamic losses.

rtkwe··on New Casio F-B100W – Upgrade to the iconic F-91W after 40 years
I'd argue the coin cell and the power budget limitations that come with it are part and parcel of it's nature as a cheap casio resin watch.
rtkwe··on Casio F-B100W-1A
It's still powered by a coin cell so it's probably for power conservation reasons. Way cheaper to periodically power on the BT radio and sync steps to your phone than it is to constantly listen for notifications.
rtkwe··on Supersonic Trebuchet [video]
Whips work because they gradually get lighter and lighter along their length meaning the same energy as it propagates down the length results in higher and higher speeds. Strapping a projectile to the end throws all of that off unless you make the whip extremely heavy to compensate.
rtkwe··on Supersonic Trebuchet [video]
As long as there have been forums there have been guys and gals making extremely deep and long deep posts and threads about their projects. Video and YT just make it 100x more accessible.
rtkwe··on Supersonic Trebuchet [video]
You'd need to build a very large, very heavy whip, like a chain whip but those only work laying on the ground due to how heavy they are, because the mass at the very end of a whip gets going so fast /because/ it's extremely light compared to the rest of the whip. So scaling up the weight to even a few grams of projectile means the rest of the whip gets very heavy.
rtkwe··on How does IKEA come up with names for its products?
Perhaps even the source of that rule.
rtkwe··on We've flown a radiation-blocking vest to the Moon and back, and it worked
The difficulty is making it protective but light enough to not significantly hinder the spacecraft or person wearing it, all of which is covered in the article.
rtkwe··on An Engineer's Old Cooking Trick Is Going Viral, Divides the Internet
There'd be a lag between a new algospeak abomination popping up and it getting added to the filters at least but yeah I think it's probably largely ineffective now. Probably even less so if they're using LLMs to screen for potential new substitutions but the practice already gained popularity so even if it's ineffective now it'll persist until it's supplanted or becomes outdated. It's like the persistence of some SEO optimization techniques even after Google et al adjusted the algorithm to account for them.
rtkwe··on An Engineer's Old Cooking Trick Is Going Viral, Divides the Internet
It not /all/ about triggers it's partially driven by the algorithms on some social sites like TikTok or Youtube where there's some evidence and a lot of speculation that mentioning or including certain words can cause the recommendation algorithm to suppress your videos etc. That leads to a lot of homophones etc popping up like "sewer slide" or odder non mentions like unalive popping up. Because the really big channels care about maximizing reach for monetization reasons it shows up strongly in peoples feeds which drives wide adoption.
rtkwe··on Marketers are Addicted to Bad Data (2020)
> Business data is for business purposes

I mean isn't the business purpose for the company running the ad campaign to actually increase revenue? Sure for an outside ad company just making the client happy is sufficient but for internal teams and the customer themselves the data is still bad.

rtkwe··on Buy Your Friends Batteries
The size the article is talking about are usually around 100 pounds or ~50kg at least. My solution is the much smaller Anker Solix C1000 and it's outboard battery extension. It can output up to 1800W sustained with a 2.4 KW peak and the two units together have about 2100 Wh of capacity. They're small enough to move around by hand when disconnected but can't do the kind of peak shifting the OP article was talking about so they're purely backup or car camping power. I used them to power my WFH setup while my electrical service was being upgraded a while ago though and it worked well enough.
rtkwe··on Buy Your Friends Batteries
The issue there is the plug would be on the battery which you're unlikely to have mounted in a convenient location for things like your main fridge, router, and computer. For me all 3 of those are pretty far away from the most likely places I'd put a battery bank. I have a mobile one I keep charged up for emergencies and long power outages and have a small portable solar panel for it for multiday outages.
rtkwe··on We Tracked a Shipment of Rare Books. It Ended at an Amazon AI Training Facility
They could scan and store the data until the copyright expires without issue probably. It's a long time line to work with but you could probably get away with it that way.
rtkwe··on old.reddit.com Now Requires a Login
They started it late last week on the new reddit. I'd been browsing unlogged in for ages because I'm pretty certain logging in from work via my VPN killed my old reddit account that was 13 plus years old at the time for "ban evasion" from a sub I'd never been banned from. Of course the appeal process was no help so I'd just been browsing offline to avoid the chance that'd happen again with my new account too.
rtkwe··on Asus Bike Booster
That's a problem people already deal with in a lot of ways mostly by being better locked up than other more stealable bikes. Bikes being stealable isn't exactly a knock against this if you can take it off easily either...
rtkwe··on Asus Bike Booster
It looks like their solution is to make it easy enough to install and remove you take it with you. My thought would be security bolts so the pool of thieves is at least limited to people with the right bolt head. Also it has a big battery built in so
rtkwe··on Pixel 11 Pro Fold
Are they? The Pixel 11 Pro and regular screens are only a tenth of an inch larger than the 3 year old Pixel 8s. The screen sizes have largely stabilized IMO with people who want any larger screens being pushed into the folding phone category. I get it's larger than the mid 2010s normal but they're not really getting much larger in the last couple years.
rtkwe··on U of Michigan drops first-semester grades to ‘curb mental health crisis’
Places are more concerned about mental health now for starters.
rtkwe··on U of Michigan drops first-semester grades to ‘curb mental health crisis’
College is a pretty large step up for most people even if they're good at high school and go to a relatively decent one. It's a sudden promotion to full adult in charge of yourself and your success in a way that's hard to prepare for living at home.
rtkwe··on France to ban unsolicited telemarketing calls
So many of the calls I get (in the US) have no mention of a company name and if you ask they hang up immediately AND they come from fake numbers so blocking or reporting is meaningless. Is the situation in France different? I don't think this would really do much for the situation in the US sadly unless we got reliable non spoofable caller ID.
rtkwe··on 'Pervert glasses': Backlash against Meta's smart glasses grows
For AR glasses the current best option for tracking is inside out tracking so the camera would basically always be deployed.

I don't think we have to go so far as assigning nefarious intent here, there are a lot of reasons they're designed as they are. For example your proposed solution is bulky, expensive and prone to damage, so there's plenty of non-nefarious reasons they don't have it operate that way.

rtkwe··on 'Pervert glasses': Backlash against Meta's smart glasses grows
I wish there was a way to do it without all the problems of having cameras on people's faces. The tech of AR glasses would be pretty neat to get working given I was raised on Sci-fi with visual overlays on people's vision being a pretty common piece of tech. You'd have to trust they couldn't get jailbroken to add recording though even if a company with enough trust made a set with cameras only able to be used by the inside out tracking system.
rtkwe··on 'Pervert glasses': Backlash against Meta's smart glasses grows
Most people are pretty obvious about it if you're looking. It's still the fact they could be doing it right in front of you without you knowing that really makes people hate the subtle-camera-on-face-products.
rtkwe··on 'Pervert glasses': Backlash against Meta's smart glasses grows
It's true but phones are much more obvious that you have them out and probably filming where the glasses aren't so can be more controlled and at least reacted to. The glasses create more uncertainty about if the person is filming.
rtkwe··on 'Pervert glasses': Backlash against Meta's smart glasses grows
Correct the issue isn't Meta people just don't like the idea they could be being recorded at any time to get blasted out to the whole world. Yes, in theory you're always open to being recorded in public but the glasses make it far more subtle /and/ up close so more normal interactions become subject to the intrusion in a way that would normally be quite obvious.

It's basically the same backlash that hit Google Glass over a decade ago. Nothing has really changed about the product and the reason people reject is so viscerally when they're not the user.

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