d : I -> T
is a continuous function d from the unit interval I = [0,1] to T, representing delivery, and the other half-edge p : I* -> T
is a continuous function p from the conjugate unit interval I* = [1,0] to T, representing payment.Somehow it feels fitting that ACME instead puts a lot of effort into carrying inventory, where the single half-edge, o, representing on-premises inventory, is the identity on T.
Once, at the Maker Faire, a guy walked up to me and showed enthusiasm for my exhibit (a solar telescope). He looked familiar, and I recognized him as Cliff Stoll.
Many years ago- like fifty five - I worked at a museum that had a solar telescope. I had the wonderful summer job of doing sun-shows for the public. Beyond learning about sunspots, prominences, flares, and H-alpha filters, I learned how to speak to the public on a technical subject. How to keep kids' attention even though the subject may be out of their domain.
That summer job eventually led me to working at the solar observatory at Kitt Peak and was the start of my becoming a planetary astronomer.
So seeing your solar telescope brought back delightful memories and the happy feeling that someone else is discovering things that I once knew.
My smiles back to you, even in this week of solar minimum.
Welt·an·schau·ung: a particular philosophy or view of life; the worldview of an individual or group.
speicherverwaltung -- memory management.
Learned it from the "spvw" abbreviation in CLISP sources.
Hmm, how can I tie this ridiculous digression back to the topic? Oh, I got it: the original author of CLISP is also named Stoll.
;-)
(For people who weren't Perl hackers in the mid-late '90s, Randal pretty much did exactly that while contracting at Intel, and got 3 felony convictions and 5 years probation, and it took him 12 years of fighting to get the felonies expunged. Be very very careful "trying out" security related things at your employer, without very clear written instruction showing it was authorised - you do not want to be the guy in front of a judge saying "it's part of my job description as a sysadmin!" when your employer is claiming otherwise....)
Cliff stops by here from time to time to comment as well. Here’s a recent comment thread he participated in: https://news.ycombinator.com/item?id=21830277
Wasn’t there an old Nova episode about this on PBS? I vaguely recall it, and have always wanted to rewatch as an adult. Just a fantastic (real!) story.
I remember as a kid there was an ACME in my town which was one of a chain of grocery stores, but in Roadrunner and Coyote cartoons it was a mail-order company that would send Coyote all kinds of crazy devices (which the real world ACME did not tend to have on hand).
Now, as an adult, there’s a Theatre company in my city called ACME and it’s also the name of a standard for requesting SSL certs, and now this guy has a joke about his Klein bottles being made by ACME.
So what’s up?
https://en.wikipedia.org/wiki/Acme_Corporation#Warner_Brothe...
Most recent uses of "Acme" are probably influenced by Looney Tunes.
ETA: In case it's not clear, it's not an acronym/initialism, although it's sometimes confused with one or given meaning as a bacronym.
Usually when this happens, its well worth the license fee to figure out whats wrong to improve the product, and the customer is eager to help.
-I want people who use my product to be happy with it.
-If they are not, I dont want them bad mouth me.
-When someone is unhappy, that an excellent opportunity for me to learn, so I want to incentivize my customer to engage with me in a productive and not antagonistic way.
What a perfect solution to the fake defective / return problem!
(Though this particular business seems low volume enough that you can probably easily deal with that problem so long as you don't have to scale it.)
> send it back piece by piece for more bottles
> repeat with new bottles for infinite bottles
Not a perfect solution haha
From the limericks page:
Three jolly sailors from Blaydon-on-Tyne
They went to sea in a bottle by Klein.
Since the sea was entirely inside the hull
The scenery seen was exceedingly dull.
There once was a young lady called Bright
Who travelled much faster than light
She left one day,
In a relative way,
And returned on the previous night!
It wasn't a great limerick, and Mrs. Spencer had to help me with it:
There was a young lad from Dunn School
Over books with good looks he would drool
The books got so soggy,
They were fed to the doggie!
That poor young lad from Dunn School
After that unauspicious start, I went on to drawing maps of freeway interchanges. When I finished those, I decided I wanted to make a printed circuit board.
I figured I needed a kitchen cutting board (for the "board" part), a sheet of copper, some electrical tape to act as resist, nitric acid to etch away the unmasked parts of the copper, and a fish tank to hold the nitric acid.
So Mrs. Spencer got me all of those! I laid out the tape on both sides of the copper sheet and dunked it in the tank of nitric acid. We watched the copper dissolve into the acid, and there were the traces for my circuit board.
Of course we didn't need eye protection. We were all immortal and invulnerable in those days.
It was the most awesome third grade class ever!
https://books.google.com.vn/books?id=UGGhM2XKE_0C
The book is: Cooper W. A random walk in science. CRC Press; 1973. Surprisingly high citation index (58).
Thanks for the link to the book, that is fun.
(Limit 1 per customer. Subject to availability and export controls.
ACME regrets to inform its amiable clientele that a recent site visit to our manufacturer for the new Banach-Tarski Playkit has revealed that although the raw spheres have been delivered and are in-process, they are likely to remain on backorder for an unbounded amount of time.)
https://gingerybookstore.com/product143.html
I believe it's only available used at this point, but:
"Chapters include: laboratory glass blowing, laboratory optical work, technique of high vacuum, coating of surfaces by evaporation and sputtering, the use of fused silica, electrometers and electroscopes, Geiger counters, vacuum thermopiles and the measurement of radiant energy, optics, photoelectric cells and amplifiers, photography in the lab, heat and high temperature, notes on the materials of research, notes on the construction and design of instruments and apparatus, and molding and casting."
It's birdwalking a bit, but you posting that also made me check to see if Internet Archive has early editions of Vogel's Practical Organic Chemistry, and they do!
Another really cool blast from the past.
https://archive.org/details/Practical_Organic_Chemistry_Voge...
"The polhode rolls without slipping on the herpelhode in the invariable plane"
(did I remember it right?)Cliff actually sent photos of the klein bottle I ordered as it was being packaged up for shipping! Lots of humorous tidbits hidden all around the website. Worth taking a few minutes to explore around.
Btw, if you like interesting people with wide-open minds who also sell stuff from their fun and quirky websites, I can share a few others:
http://www.constructingtheuniverse.com/
https://www.youtube.com/playlist?list=PLt5AfwLFPxWJeBhzCJ_JX...
https://hackaday.com/2015/06/24/crawlspace-warehouse-include...
Really impressive guy.
Didn't take long before crawling around caused backaches - and thus, the mother of invention visited me in the guise of an idea of a remote controlled forklift.
Cheers to all, -Cliff
Here's a good one for you about the younger generation: “The children now love luxury; they have bad manners, contempt for authority; they show disrespect for elders and love chatter in place of exercise. Children are now tyrants, not the servants of their households. They no longer rise when elders enter the room. They contradict their parents, chatter before company, gobble up dainties at the table, cross their legs, and tyrannize their teachers.”
― Socrates
After I bought it, I kept everything, even the packaging.
"Cliff last updated this page on Sept 5, 2020, while worrying about California's forest fires"
Next step, create bot that pulls headlines and auto-updates timestamps.
If you are on the fence about buying one I would recommend doing it for the following reasons:
- Klein bottles are cool
- Klein bottles are great conversation pieces
- Buying things from Cliff is an experience unto itself
Seriously, if only all retail experiences were as personalized and enjoyable as buying from ACME Klein Bottle is.
> customer service is easy when you run a zero volume business
Funny, the Pierson's Puppeteers have a similar warning for their General Products hulls.
Este post me trajo muy buenos recuerdos.
>(at the moment, this Hacker News squib has resulted in a veritable tsunami of Klein bottle orders -- over a dozen -- and I'm getting kinda backlogged. Looks like I'll be working tonight & tomorrow. And it's my turn to wash the dishes tonight...)
This
I bought one of these the last time this was on HN.
And the joy of reading through this site just suddenly made me yearn for an xkcd style graph showing klein bottle sales over time since last post on hn complete with snappy punchline in hidden text.