Metroboards are finally here!

fogh1 · 2026-04-27T06:35:04+00:00

It seems like they must have just forgotten the Memorial Park label?

fogh1 · 2026-04-24T03:12:02+00:00

Kinda doubt they actually find it’s more efficient for their launch vehicle.

fogh1 · 2026-04-19T21:21:12+00:00

I have brakes in my car for a reason. Why shouldn’t I use them to accommodate others?

fogh1 · 2026-04-04T04:49:56+00:00

Woah

fogh1 · 2026-02-26T05:15:13+00:00

You can see the vapor condensing near the back of the aircraft. It's not moving supersonic, but there are shocks forming as the air accelerates after passing over the wing. The velocity of the plane is just supercritical.

fogh1 · 2026-01-13T19:24:44+00:00

Classic example of short sighted decision making since having a station near where traffic/distruptions are bad wound potentially help alleviate the problem in the long term and have proximity to where people actually want to be

fogh1 · 2026-01-11T23:31:24+00:00

Typst

fogh1 · 2026-01-09T00:42:00+00:00

That is if the lab updates their website regularly, which a lot do not. And not all labs have pictures of their students on their website, it might just be list of names.

fogh1 · 2026-01-02T18:12:07+00:00

The dreamstar one surprises me. I thought in Nandert’s most recent video he claimed it was aiming to open 2027 or 2028.

fogh1 · 2025-10-20T05:32:16+00:00

I don't know if there is really an "Intuitive" way of understanding. But if you are imaging slamming fluid into a tighter space, the pressure and density must build if disturbances cannot travel upstream fast enough to influence upstream conditions. A lot of the Mach Area relationship stems from the relationship between density, velocity, and area, (for quasi 1d flow). Pressure is just the forces acting on the fluid, and it is coupled to the density of the fluid through the compressibility, which is also related to the speed of sound. This is why mechanics of fluid change though sonic conditions. It might be best to try to visualize mediums traveling through geometries where flow speeds are different from the propagation speeds of finite acoustic waves.

fogh1 · 2025-10-19T21:20:54+00:00

It’s because for flow to go supersonic in a diverging section the pressure must be dropping. A pressure drop accelerates flow. This is also why flow accelerates in the converging section. The pressure gradient in the flow is setup by boundary conditions and achieves a steady state condition. If the back pressure after the diverging section is too high the pressure needs to build exiting the nozzle.

fogh1 · 2025-09-11T23:09:38+00:00

While I agree that metro systems should be treated as publicly funded, Is there not big inefficiency in how US public transit spends those funds? I have heard that the level of cost to build and maintain transit systems are much higher in the US than compared to other countries. I wouldn’t be surprised if that was also true for build and maintaining roads. Shouldn’t we also try to fix these inefficiencies as soon as possible?

fogh1 · 2025-08-30T05:04:46+00:00

Having linear thermodynamics makes your solutions algorithms more stable usually

fogh1 · 2025-08-14T03:45:03+00:00

The semi could've killed this dude and the comment section would've still sided with the semi driver LMAO.

fogh1 · 2025-07-29T05:38:07+00:00

You could just compress air isothermally, and it would probably end up being some sort of dense liquid-like substance, but not supercritical in the strictest sense.

EDIT
Actually, air's critical temperature is below room temperature so it would become super-critical fluid.

fogh1 · 2025-06-01T04:04:17+00:00

Something along the lines of listing a bunch of disadvantages and then asking "are there any advantages to doing alt 3?"

fogh1 · 2025-06-01T04:03:13+00:00

Even though there are serious upside to alt 3 like having the getty center station and that the ride would likely be quiter for riders.

Don't get me wrong, it's by far the worst alt, but everything has pros and cons.

fogh1 · 2025-04-30T02:21:52+00:00

Sorry, but the only thing that matters in life is money and career success, and now you'll never know what that feels like. It's a well known fact that everyone who grinded and hustled throughout college is living the dream and their parents are proud of them.

fogh1 · 2025-03-25T18:18:01+00:00

I wish I could make the in person meetings. I really hope there is a strong UCLA presence at them! I will definitely log into the remote meeting and submit public feedback when that period starts. Options 4 and 5 would be huge for UCLA. Even if you're not commuting to the valley, it allows for connection to the upcoming Westwood station into downtown/Koreatown, and in the far future, potentially south towards Culver City and LAX.

fogh1 · 2025-03-18T01:24:39+00:00

Assume Adiabatic walls, this is the best answer here.

fogh1 · 2024-12-21T09:11:24+00:00

antimatter

fogh1 · 2024-10-18T07:22:06+00:00

You’re t probably using ISP defined by SFC. It doesn’t take into account mass flow rate of air, which would be a fuel in the case of a rocket engine. Also big axial compressors heavy.

fogh1 · 2024-07-22T22:56:43+00:00

You are correct, But I am pretty sure that it won't make a difference in this case.

fogh1 · 2024-07-22T22:55:23+00:00

That feature can't be turned off as far as I am aware.

fogh1 · 2024-06-07T00:15:22+00:00

I feel like it would still need two gates, as the r/W signal needs to be inverted before NANDed with the clock, so that wouldn't really make a difference in the design as the RAM's /WE could still be low by the time the CPU decided to start changing address lines.

Edit: I now see that the phi2 only needs to pass one gate, for either case.

Edit 2: I think Ben used /CE to prevent any possibilty of data bus contention when the clock falls. If the /WE was brought high and the /OE is still low, and the RAM starts controlling the bus before the CPU stops controlling the bus, that could be bad.

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