#video #lecture by John #Ousterhout about how his new RPC protocol #Homa improves tail #latency compared to TCP/IP and RDMA (RoCE)
on 02026-09-22#Video of Andrew Kelley's #lecture at #SXSW this year saying that (specifically for #AI) “if you don’t control the source code, you are not in control,” claiming AI agents are under the control of AI companies, which is of course true. There’s a section about disliking AI but using it anyway, and a section explaining how #Anubis is killing the open Web.
Very clear statement about the value of #free-software: “It primarily matters whether high-quality free software is available to users, providing competition that limits the degree to which proprietary software can get away with being coercive.” #toread
on 02026-09-22#video #lecture by Peter Alvaro of UCSC at Strange Loop about disorderly systems and “I see what you mean: what a tiny language can teach us about gigantic systems” #toread
on 02026-09-22#video #toread of a #lecture by Elm author Evan Czaplicki at Strange Loop 02023 about “The Economics of Programming Languages”
on 02026-08-20#Gelbart #lecture #video #toread on “limitations of servo systems, introduction to #sensors, and #LVDT”
on 02026-07-27#Gelbart #lecture #video #toread on “choice of filter, grounding, and sampling”
on 02026-07-27#Gelbart #lecture #video #toread on “tellurometers and inductosyn”
on 02026-07-27#Gelbart #lecture #video #toread on “interfacing, filter selection, and types of wires”
on 02026-07-27#video #toread of Will Sturgeon #lecture on type theory
on 02026-06-23#video #lecture 12 part 3 on #mechanisms of #flexures. #toread
on 02026-06-17#video #lecture 8 part 1 on #mechanisms of #flexures. #toread
on 02026-06-17#video #lecture 9 part 2 on #mechanisms of #flexures. #toread
on 02026-06-17apparently a 77-minute #Gelbart #lecture #video: “Summary of Sensors, Limits of Accuracy, and Unusual Sensors, by fizzym” about how digital calipers were originally inductive, switched to capacitive (bad in a machine shop, and also using incremental encoders), and some have now switched back to inductive. Also talks about #Tellurometers, and material stability with time (he says steel and regular invar shift by 1 or 2 ppm in a year) and recommending Rolt’s #metrology book Gauges and Fine Measurements. And how laser microphones bounced off windows work. And how the Russians bugged the US embassy. And nonlinear junction detectors for finding bugs, using a second-harmonic narrowband filter to detect parts per billion of nonlinearity in the reflected signal. And how you detect eyes looking at you by scanning the scene around you with a 10mW 830nm laser and looking for retroreflections a million times weaker (10 nanowatts, a “huge signal” in #optics).
on 02026-05-17#video playlist #toread about algorithmic game theory including mechanism design from Roughgarden’s #lecture series at Stanford
on 02025-12-26Announcement of the 01998 #SAGE #history #lecture at the #CHM.
on 02025-12-11Transcript of the #SAGE #history #lecture at the #CHM in 01998.
on 02025-12-11100-minute #video on #SAGE #history from a Sun-sponsored #lecture at the #CHM in 01998. Relevant context is the USSR’s first atomic bomb test in 01949. Aircraft kill ratios in the Battle of Britain were 10%, so an effective air defense was unthinkable. At 30'00” Paul Edwards gives the cost as US$4–12B in 01960 dollars. At 30'40” Paul Edwards explains that IBM got paid US$500 million to build the planned 56 computers (28 duplexes). Western Electric film on it starts at 5'11”. 800 programmers (34'00”) which was 20% of the world’s programmers, all working at SDC, which spun off from RAND toward the end of 57, as James Wong explains (55'20”). Maguire went online in June of 01958. Stuart Air Force Base in September. Apparently MIT’s original proposal was to put the whole system underground, but the Pentagon decided that was too expensive. Invited speaker #Les-Earnest (?) says, “This gave rise to this whole industry of ‘L-systems’, so-called: 438L, 465L, all this stuff, that were competing for funds with other things. And for the most part, none of them worked worth a damn. Uh, there were a few exceptions. The satellite control system, I would say, and provided good intelligence, but most of these others, including the Strategic Defense Initiative, were basically boondoggles, and we ain’t through it yet. This stuff is still going on. It gave rise to a multi-billion-dollar industry that basically produces useless junk. And here we are 40 years later.” They tried doing SAGE in JOVIAL, but ended up doing it all in assembly. Mean time between failures of each half of the duplex was maybe days.
on 02025-12-11more #Slocum #mechanisms #lecture #video content from 9 years ago. #toread
on 02025-12-10#video #lecture by Alexander #Slocum on bearings in #mechanisms in a Stars and Stripes do-rag: “In this series of 2.75 videos (named after my MIT class 2.75 Precision Machine Design ) I present the material that is in my on-line free book “FUNdaMENTALs of Design”.
Please also see my website www.ooseh.com where I try to write practical poems to try and help the world be nicer 1/:-( = :-)
(...) As the Pappalardo Professor of Mechanical Engineering, in in late 1990’s I started writing “FUNdaMENTALs of Design” to be a free publicly available design book, and then further developed the material while on sabbatical in 2000 as an Erskine Fellow at the University of Canterbury. (...) Passion, Precision, Pass it on! / Alexander Slocum / Walter M. May and A. Hazel May Professor of Mechanical Engineering / slocum@mit.edu”
on 02025-12-10#MIT #OCW #lecture #video on introduction to power #electronics #toread
on 02025-11-25#video #lecture 9 part 1 on #mechanisms of #flexures. Hopkins demonstrates how to analyze serial flexures as combinations of parallel flexures, showing that a bent blade flexure is kinematically equivalent to a wire flexure.
on 02024-10-02