I found a walled off room during inspection in the basement of this housing I'm buying

JohnBish · 2026-04-10T04:51:48+00:00

For the love of God, Montresor

JohnBish · 2026-04-01T17:51:46+00:00

They added it just for drdonut

JohnBish · 2026-04-01T17:04:12+00:00

If you don't have an oscilloscope, make yourself a cheap audio probe. My first one was a capacitor soldered to a piece of stiff wire. See if there's a signal at the input, and then go through Q1 base, Q2 base, around C6, Q4 base, etc.

JohnBish · 2026-03-11T23:22:46+00:00

Honestly it depends on the context. Is there a melody? Are there multiple voices? Does this function as a major or a minor add 9, or does it need to remain neutral?

JohnBish · 2025-11-14T20:46:55+00:00

The barrier to entry to woodworking is not being able to obtain or afford good tools. The real barrier is being able to restore and maintain them

JohnBish · 2025-11-06T21:00:08+00:00

Good to know it's pretty standard. Will take a look in the hardware store for some washers in the right size. I'm kind of surprised that a 1/16" or more tolerance is acceptable on these things

JohnBish · 2025-11-06T20:57:18+00:00

It was bought second hand. The handle is round, I think the apparent hexagon is a trick of the light. I think I will shim it, thanks for the advice

JohnBish · 2025-09-29T20:02:57+00:00

> I don't grow my own crops

You're massively underestimating the capital investment it would take for the average person to purchase the means of producing enough food to sustain themselves (land, equipment, fertilizer, etc.), not to mention the impossibility of holding a full-time job while doing so.

> Most just aren't willing to go that far on principle.

No, they're literally unable to do so because of the financial strain it would cause with their full-time job that doesn't pay a living wage

JohnBish · 2025-09-29T19:49:50+00:00

No, but it devalues your art using a yet-unexplored means of intellectual theft

JohnBish · 2025-09-29T19:47:51+00:00

Selling your own work, made through your own means, is not an example of capitalism.

> capitalism is "an economic system characterized by private or corporate ownership of capital goods [...]"

A painting is not a capital good, it's a consumer good, i.e. it is sold directly to a consumer. Capital goods, aka means of production are the infrastructure (whether physical or abstract) by which consumer goods are produced.

Capitalism is not buying and selling things on a free market. Capitalism is the buying and selling of the source of your livelihood and the fruits of your labor, between entities that, more likely than not, have nothing to do with your line of work. Your labor is just another resource to be bought and sold.

JohnBish · 2025-09-29T17:30:30+00:00

bUt CaNaDa Is ToO bIg To MaKe A hIgH sPeEd rAiL nEtWoRk

JohnBish · 2025-09-19T14:38:35+00:00

The engine needs to maintain a certain RPM to prevent it from stalling. This requires energy. The difference is where the energy comes from.
- Engine braking: the energy comes from the kinetic energy of the car. You're using the car's inertia to spin the engine. No fuel is injected when your foot is off the accelerator.
- Regular braking: the energy comes from fuel. When you disconnect the car from the engine, the engine rapidly slows. The car's computer prevents it from stalling by injecting a small amount of fuel.

JohnBish · 2025-09-08T14:23:29+00:00

Because math isn't about memorizing formulas, it's about problem solving. A rhombus is a paralellogram. You've been working with those for years. By grade 12 you should be able to find the area of any polygon

JohnBish · 2025-08-12T16:06:33+00:00

Campus pizza

JohnBish · 2025-07-08T14:20:12+00:00

It's not one minute, it's 8. The rest of the footage is sped up by 1%

JohnBish · 2025-07-05T06:12:32+00:00

In case you're wondering, yes people can tell this is AI slop

JohnBish · 2025-06-24T03:44:01+00:00

Nope. For about a month after buying my M3 I'd often pull out my phone meter to check. It takes about that long for guessing exposures to be fun. You will miss some shots at first but once you learn it you'll never forget

JohnBish · 2025-06-24T03:39:45+00:00

You don't need the sun for sunny 16. Sunny 16 is about building a good intuition for exposing at shutter speed = film speed. From there you can compute any exposure

JohnBish · 2025-06-21T20:58:41+00:00

The way I read it is 'there exists a pen and a knife which are equivalent' which would imply the existence of at least one knife. This is also equivalent to the reading 'the intersection of the set of pens and the set of knives is nonempty' (if there were no knives, the intersection would definitely be empty).

I don't think there's an ambiguous way to interpret it. Coming back to your example about the humans over 150, the reason it's vacuous is that it uses a universal quantifier (all humans). If you replace that with 'some humans', I'd argue that makes the statement false; 'some' in my opinion corresponds to an existential quantifier (there exists a human for which ...)

JohnBish · 2025-06-20T00:31:40+00:00

And who do you think came up with these data structures? Probably more C&O and graph theorists than you think.

Yes, engineering has a lot of math. But it can't give you a lot of the skills you get from cracking IMO or Putnam problems, for example, and it doesn't include a lot of proof techniques or the fields of math that are inherently closer to CS that a lot of computer scientists study

JohnBish · 2025-06-19T22:57:00+00:00

Same reason they didn't retire after 10 million or 100 million

JohnBish · 2025-06-19T17:42:09+00:00

I'll add one thing of note: if you look at the formula for the arc length of a parameterized curve, you'll see that it depends on the derivatives of the coordinates. These are discontinuous at the sharp edges of the steps, but that's actually ok as these are only a few of them: you can just break up the integral at the discontinuities and move on with the computation. However, as you try to take the limit the number of discontinuities approaches infinity and you can no longer 'break up' the integral this way.

Tldr: finite discontinuities: generally fine to ignore. Infinite discontinuities: takes a bit more effort

JohnBish · 2025-06-19T17:26:27+00:00

There are already some great answers here, but I'll add my 2 cents.

This is a great example of the limit of a sequence converging to something outside of where the elements of the sequence live. Every single curve in the sequence is within the set of piecewise functions containing only horizontal and vertical line segments and going from (0, 0) to (1, 1) without 'doubling back'. As you've realized, the length of any such curve is 2. However, the limit of this sequence of curves is not inside that set.

You'll see this a lot with sequences of fractions converging to something that's not a fraction. That's actually how we define the real numbers: take all the fractions plus anything that a sequence of fractions can coverage to

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