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double0jimb0

566 karma · joined September 4, 2014

Email james.olander@gmail.com
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double0jimb0··on Meta does a U-turn, will share its technology with Five Eyes members
May as well get a little national PR out of it given current geopolitics.
double0jimb0··on Eighty Years of the Finite Element Method (2022)
FEM runs on the same math and theories those bridges were designed on on paper.
double0jimb0··on On 17th century "cocaine"
Tingling feet/toes and hands/fingers are an extremely common side-effect of acetazolamide (diamox).
double0jimb0··on A $1k Wheelchair
Two passes around the holes with the laser will get rid of the rewelding issue.
double0jimb0··on I designed a Dieter Rams-inspired iPhone dock
FormLabs really shit the bed didn’t they, Form2 raised the bar, Form3 a total bust, jury seems still to be out on Form4.
double0jimb0··on I designed a Dieter Rams-inspired iPhone dock
Forum comments have been the best resource for me. (Followed by joining the printer’s users’ Facebook group to see what sort of issues are most common).

The top SEO’d buyers guide websites are pretty useless in my experience.

That said, having owned a dozen different printers for my own business’s prototyping work, the Bambu labs are truly fantastic. I retired 3 ultimaker S7s for 2 X1 Carbons and haven’t looked back. The Bambu labs legitimately print 3-4x faster and have as good if not better surface finish. AMS system is ingenious. Only thing I did was x-y squareness/skew compensation so both printers make the same sized parts (the printers aren’t perfectly square from the factory). There are guides on how to use M1005 gcode command.

double0jimb0··on Boeing workers vote to strike
can you not hire people who are good at hardware with billions of dollars of investment?

Clearly not in Bezos’s case.

There is no magic involved here, some people have the skill/experience to lead the design, build, and selling of innovative hardware, others don’t.

For example, for designing new rockets, one of the major things Musk innovated at SpaceX was the traditional aerospace design cycle. Instead of spending 5 years on countless analyses and few actual tests, like the incumbents did/do, SpaceX built and destructed as many prototypes as possible, learning rapidly and innovating. Musk knows what innovative design truly requires.

What did Bezos do? He hired a bunch of ex-Lockheed and Boeing engineers/leads (from an industry that for decades has not felt market-driven pressure to innovate), and those engineers/leads just kept doing things the old fashion way.

When the person in charge (Bezos) misses this detail, no amount of money or wishful thinking will fix this.

double0jimb0··on Boeing workers vote to strike
Bezos doesn’t know how to build good hardware. Plenty of examples from Amazon. Then add Blue Origin to that track record.
double0jimb0··on NASA acknowledges it cannot quantify risk of Starliner propulsion issues
Didn’t read, you don’t have to based on headline.

They still don’t know root cause(s). That’s real bad Frank.

double0jimb0··on AMD's Strix Point: Zen 5 Hits Mobile
I didn’t watch this link, but my Zenbook S 16 only gets remotely close to my M2 MBA battery life if the zenbook is in whatever is Windows 11 ‘efficiency’ mode, and then it benchmarks at 50% of the M2.

I don’t think the two are remotely comparable in perf/watt.

double0jimb0··on The Titan Submersible Disaster. The Inside Story Is More Disturbing
As an product designer / inventor, I know that feeling well... that point when so many prototypes have failed, but you feel you are so close. You feel you've run out of time and that it will be too expensive to test another one, so you convince yourself to go into production with what *should* work, it has to right?!?... (well it almost never does, and it's 100% not worth the stress).

But to put your own life and others at risk making that move... whoooooooweeeeee, that's fully into batshit crazy land.

double0jimb0··on Conical Slicing: A different angle of 3D printing
Any non-arc generates instantaneous acceleration changes at the line inflection points, these are impossible for a mechanical system to perfectly implement. Huge amount of jerk results the closer/faster one tries to achieve instantaneous acceleration. Why wouldn’t a system try to use arcs and splines to minimize these effects?

The CNC controller world has been trying to solve this problem for decades. Turning everything into line segments seems to go in opposite direction of this progress.

double0jimb0··on Conical Slicing: A different angle of 3D printing
Bambu Lab does this. The accel values they print with are so high without arcs it would get quite violent. X1C is most impressive piece of hardware I’ve bought recently, just bought another today. Prints 4X faster than ultimaker

https://wiki.bambulab.com/en/software/bambu-studio/acr-move

double0jimb0··on CNC lasers for cutting and engraving
Delrin/acetal has incredible properties and is great material to laser cut. Make sure to ventilate, small amounts of formaldehyde produced.
double0jimb0··on Anime is a $25B industry that pays its animators pennies
Tesla as an innovation-driven company couldn’t be further from the types of metal industry jobs you refer to. Why can’t an innovative company trade its “capital” to get the young and ambitious to work for less pay?
double0jimb0··on It's Time to Nationalize and Then Break Up Boeing
They said the same thing about rockets.
double0jimb0··on Hertz to sell 20k EVs in shift back to gas-powered cars
Don’t they have insurance for repair costs? And don’t they ask you 10 different ways from Sunday to pay for insurance when you are checking out?

So read another way, they mispriced their repair plan and it’s costing them money.

double0jimb0··on Why Frames Tilt Forward (2015)
Author discovered value of free body diagrams.
double0jimb0··on Gov. DeSantis signs bill banning most direct-to-consumer auto sales
You ended up paying the dealerships cost, which is probably same you would have paid if dealership was never in the picture.
double0jimb0··on US urged to reveal UFO evidence after claim that it has intact alien vehicles
This is the situation I’m leaning towards. Military has been trying unsuccessfully for 80 years to figure it out. An adult finally walks into the room, sees how hopeless their attempts are, and whistleblows.
double0jimb0··on US urged to reveal UFO evidence after claim that it has intact alien vehicles
I’ve not taken a side yet, but to answer your first question, the original journalism outlet that published his story is The Debrief (who are pretty widely respected in the defense world), and they documented the source checking they did on Grusch:

https://thedebrief.org/fact-check-q-a-with-debrief-co-founde...

double0jimb0··on SpaceX Starship rocket explodes minutes after launch from Texas
Pretty sweet that they got to test 33 Raptors at a time. You can find failure modes approximately 33 times faster that way.
double0jimb0··on SpaceX Starship rocket explodes minutes after launch from Texas
From the launch commentary, the rocket is designed to do a 180 at that altitude for the separation event. So a couple extra rotations isn’t going to hurt anything. Additionally, air density at 100k ft is ~1/80th of sea level, which helps.
double0jimb0··on Negativity drives online news consumption
Had similar experience watching TV ads. It started with a beauty ad which was plainly targeting viewers’ body image insecurities. Was very jarring to recognize how dark and manipulative the glossy, “upbeat” ad truly was.

Then recognized same pattern in every TV ad afterwards, almost all target some sort of insecurity or feeling of lack.

double0jimb0··on Treasure trove of mechanical animations (2015)
I’ve always wondered if this effort from Nguyen Duc Thang had an ulterior motive, like possibly prior-arting entire swaths of new inventions…
double0jimb0··on Ask HN: Disabled and out of work for years, but need some side income
This is correct.
double0jimb0··on Origami is yielding new applications in spacecraft, architecture, and medicine
Great research and applied work.

Overselling these “discoveries” though: https://www.compliantmechanisms.byu.edu/about-developable-me...

All are parallel 4-bar or spherical 4-bars which have been known for centuries. Getting fancy with the shapes of the “bars” isn’t novel.

double0jimb0··on Airbnb removed my negative review
If you paid by credit card, sounds like prime opportunity for a chargeback. The credit card company WILL stand on your side.
double0jimb0··on Ask HN: How did you stop drinking?
The Sinclair Method (TSM), 78% success rate.

https://cthreefoundation.org/the-sinclair-method

double0jimb0··on Stores weigh paying you not to bring back unwanted items
Successful merchandisers should establish a price point, customer demographic, and margin that maximizes their potential “good”(non-abusing) customers and controls/minimizes nefarious types.

Walmart’s fraud dept looks much different than Nordstrom’s I would suspect, but both know their respective landscapes and successfully navigate them.

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