| 2024 | |||
|---|---|---|---|
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Sep
12 |
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awarded | Yearling |
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Sep
12 |
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awarded | Yearling |
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May
1 |
|
revised |
Computing technology in a world with only Gold, Copper, and Silver Added example of copper oxide camera |
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Apr
28 |
|
comment |
Appropriateness of lasers for alien plant control Absolutely you can use lasers for weed control, in fact, here's a laser weeder you can actually buy that does 100'000 weeds an hour! - not quite man-portable, but anyone waging interstellar war is likely to have (at least a little bit) more advanced tech |
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Apr
26 |
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revised |
What is this 9-in-line latching connector? added 6 characters in body |
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Apr
26 |
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revised |
What is this 9-in-line latching connector? added 295 characters in body |
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Apr
26 |
|
revised |
What is this 9-in-line latching connector? added 425 characters in body |
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Apr
26 |
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answered | What is this 9-in-line latching connector? |
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Apr
23 |
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awarded | Nice Question |
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Apr
23 |
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awarded | Yearling |
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Apr
23 |
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awarded | Yearling |
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Mar
18 |
|
revised |
Duplicates being removed from PostgreSQL array when doing int[] - int[] but not int[] - integer Added DBFiddle link |
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Mar
18 |
|
comment |
Duplicates being removed from PostgreSQL array when doing int[] - int[] but not int[] - integer I've sent the Postgres team a message, if I get a response, I'll add it to the post |
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Mar
18 |
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awarded | Editor |
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Mar
18 |
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revised |
Duplicates being removed from PostgreSQL array when doing int[] - int[] but not int[] - integer Added supporting image and DB version used |
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Mar
17 |
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awarded | Student |
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Mar
17 |
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asked | Duplicates being removed from PostgreSQL array when doing int[] - int[] but not int[] - integer |
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Mar
6 |
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answered | How easily could a pre-scientific people purify a substance and hence grow a pure crystal? |
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Mar
3 |
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comment |
How much can you compress information? You might want to adjust your conversion from pm to m^2, unit conversion is always a pain because when you have >1D units, you've got to multiply the base units too! i.e. 100*150*150*(10e-12 m)^2 per bit (because square units) or about 0.44Exabits/m^2. So you'd need (10ZBytes/0.44Ebits)/(m^2/nm) or half a beer can worth of space... (unit cancellation is weird) But amazingly, a modern 1Tbyte (8Tbit) micro SD card, at 165 cubic millimeters already gets you ~6GBytes/mm^3 or 0.006ZBytes/m^3. You could store that much today with just 1 house worth of 1TB micro SD cards! |
| 2023 | |||
|
Dec
27 |
|
comment |
Why do we need to use transmission line theory? One way to help visualize it is: Have you ever quickly turned of a water tap and the house suddenly starts shaking? Signal reflections have a lot in common with water hammer (sort of). Water (energy) is flowing through a pipe when suddenly we introduce a fast pulse (slamming the tap shut), problem is we've still got energy in motion and that energy has to go somewhere, and seeing as a solid metal tap makes for a pretty poor shock absorber (impedance match), all that energy gets flung back the other way (reflection) - the faster the pulse, the worse it gets |