pgreenwood

"The Symmetries of Things" [1] by John H. Conway, Heidi Burgiel, and Chaim Goodman-Strauss.

A fantastic and beautifully illustrated expository work describing symmetry groups such as the 17 wallpaper groups in the plane (think Escher), and other tiling groups in for example the hyperbolic plane. Love the use of orbifold notation as opposed to crystallographic notation.

[1] https://www.amazon.com/Symmetries-Things-John-H-Conway/dp/15...

Love the subject matter but the hyper saturated over blown HDR makes me feel like I have a brown acid hangover.

HDR is great, but if you can tell it's there its too much.

Interesting, the book worked for me, particularly because it did address reasons (that I thought I had) like cognitive stimulation, social connection, and taking a break.

I'd like to add; that I think that all of the stimulants mentioned above result in a net loss of energy and focus, even if the peaks are higher.

A great loss. One of my greatest inspriations to train as a mathematician. I'm so sad I never got meet him.

I did get to see one of his lectures in Australia in the 90s. I remember him joking that he has a recurring nightmare that he would meet a man in the street who could draw an icosahedron faster than him. I always hoped that one day I'd get the opportunity to take up that challenge.

Reminds of the Messerschmitt KR200 from the 50s and 60s: https://en.wikipedia.org/wiki/Messerschmitt_KR200

I call stocks that don't not pay dividends speculation. I do not count them as investment.

Yes, you can actually put them anywhere in the string.

"The Symmetries of Things" [1] by John H. Conway, Heidi Burgiel, and Chaim Goodman-Strauss.

A fantastic and beautifully illustrated expository work describing symmetry groups such as the 17 wallpaper groups in the plane (think Escher), and other tiling groups in for example the hyperbolic plane. Love the use of orbifold notation as opposed to crystallographic notation.

[1] https://www.amazon.com/Symmetries-Things-John-H-Conway/dp/15...

Right, it's pay for what you take instead of what you make.

Looks great! A fair bit more functionality than similar apps. I'd love to see an option to use orbifold notation as well as crystalographic.

Sounds like she might be seeing the new forth primary colour squant.

https://www.negativland.com/archives/015squant/story.html

David Lynch Cooks Quinoa is one of my favorites:

https://www.youtube.com/watch?v=uSP-ewdJYJc

There is a fundamental equivalence between unique pictures of a cartoon mice and automobiles. Any automobile can be mapped to any particular unique cartoon mouse picture based on the method of encoding chosen.

Automobile ownership is saying that I own this particular result of turning a unique cartoon mouse picture into usable car regardless of starting cartoon mouse picture.

This is to say that we can't tell without actually decoding the cartoon mouse picture so we are in fact asserting that there is a chance we own any and all cartoon mouse pictures if someone later publishes the encoding that would turn your cartoon mouse picture into an automobile.

The truck in the article is a converted 79 Series Toyota Land Cruiser. I would have thought you could get one in USA?

If this drivetrain achieves its claims I will be very impressed. Shaft drive designs have been around for as long as chain drives; and they have never been as efficient. Much is lost in the torsion of the shaft. A 2% increase in efficiency is an absolutely massive gain. The cycling industry is littered with flashy looking innovations that don't live up to the hype. The basic design of a diamond frame and chain drive has not been improved upon for over 100 years.

But every now and then there are innovations that actually take hold. For example, the slant parallelogram dérailleur, hydraulic disk brakes, suspension (for mountain bikes), and recently single narrow-wide front chain rings. We shall see how well this drivetrain goes.

On a side note it's very interesting to re-watch Rambo III, where he teams up with local jihadists in Afghanistan to fight the occupying Soviets in the area. Hollywood propaganda at its finest, but brutally ironic today.

There are large differences in wrench quality. Cheap wrenches have poor tolerances in the heads leading to burred nuts. Also there can are superior designs in some ring spanners to reduce burring. Ok if you only want to use a nut a few times, but if it's a machine you want to be servicable it's very impotant to use decent quality tools.

I agree restrictive regulation are a major part of the problem. But LVT would have the effect of reducing prices even if stock were not increased, leaving rents unaffected.

If the problem is that too much capital is flowing from productive investments, like tech, to unproductive land speculation then perhaps part of the solution is to capture part of that windfall gain through a land value tax [1], i.e. a tax on just the land and not the buildings, thereby reducing the speculative component from housing investment without reducing incentive to develop more housing stock.

[1] https://en.m.wikipedia.org/wiki/Land_value_tax

If you cycle to work you can change this equation, because, your commute becomes one of the best parts of your day.

Great article, but I would like to point out a common misconception regarding mechanical advantage that featured in the article. Mechanical advantage is not completely determined by the gear ratio. You also have to take into account crank length and the wheel size. Total mechanical advantage is determined by these three factors together. See https://sheldonbrown.com/gain.html

Not LaTeX; didn't read.

Maybe also useful for training suicide commandos.

I use the similar AT bindings in Australia for all types of skiing. Pattern base skis work very well in Australian conditions too.

There is occasional avalanche incidents in Australia and sadly there were a couple of deaths on Mt Bogong a few years ago. Since then there has been a lot more awareness of the danger here.

The statistic looks appallingly bad to me viewed as a poisson process. If you had thousands of planes with zero crashes over decades would you consider that as zero data points?

That's no moon.

> The bottom line here is very simple: The cost of building and maintaining these facilities should be borne by the people who attend these events via their ticket purchases, and not the people of an entire state and/or metropolitan region, the vast majority of whom will never set foot inside these enormously costly structures.

The article is arguing from a perspective that amenities such as stadiums should be user-pays. There's an alternative viewpoint though; it could be a principle beneficiary-pays. Who benefits? Well for example the land values in the surrounding area are likely to rise, benefiting land owners through no effort of their own. If a portion of this windfall gain could be captured via say a land value tax, then that tax could partially fund the stadium in a fair way. But I agree with the author that subsidies through income tax seems unfair.

Yes I think would be the Roland 808 clap sound:

https://www.youtube.com/watch?v=ipMPb0MZr3w

The acid sound is still immensely popular amongst my cohort even after 30 years. And still some great stuff being produced (relatively) recently:

https://www.youtube.com/watch?v=HHIEqdOic9w

If it works and HIV resistance installed in a population, then it opens the possibility HIV could be then could become an effective bioweapon for that population.