Lex Fridman interviews Andrew Strominger: Andrew Strominger: Black Holes, Quantum Gravity, and Theoretical Physics | Lex Fridman Podcast #359.
Lex Fridman interviews Andrew Strominger
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Category Archives: Learning
Veritasium on Oppenheimer
A new video from Veritasium: Why Oppenheimer Deserves His Own Movie.
The 1969 Apollo Guidance Computer
Here’s a great talk about the Apollo Guidance Computer: Light Years Ahead | The 1969 Apollo Guidance Computer.
Equivocation
ChatGPT explains equivocation. Its example:
- Nothing is better than eternal happiness.
- A sandwich is better than nothing.
- Therefore, a sandwich is better than eternal happiness.
Lorentz Factor
ChatGPT tells me about the Lorentz Factor.
RTL
The initialism “RTL” can stand for both “Register Transfer Level” and “Resistor-Transistor Logic” as explained by ChatGPT.
Critical Path != Critical Section
I always get the concepts “critical path” and “critical section” confused.
The “critical section” is the part in your algorithm which you must hold a lock for; whereas the “critical path” is an idea from hardware design which relates to the time taken for the longest combinatorial logic that needs to be processed during a clock cycle, thus limiting the frequency you can run your clock at.
Although the terminology “critical path” came from hardware, the same terminology is used in software. ChatGPT has a fairly good write-up on the two uses of the term “critical path”.
I learned a little more about this in Introduction to VHDL for FPGA and ASIC design.
CRC
I watched Ben Eater’s videos How do CRCs work? and Checksums and Hamming distance (the full course is Learn about error detection) then found the Wikipedia page: Cyclic redundancy check.
Also of interest:
BPS BB830
These BB830 breadboards are the ones Ben Eater uses in his videos.
HP-16C
I was watching Ben Eater’s video Build an 8-bit decimal display for our 8-bit computer and I was interested in what calculator he was using. Seems to be an HP-16C.