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--- 2023lctgmeetingchats [2023.10.26 11:36] – Steve Isenberg
+++ 2023lctgmeetingchats [2024.01.10 08:43] (current) – Steve Isenberg
@@ Line 4: / Line 4: @@
 These are a record of the chats that were passed during meetings in 2023.  They have been edited to a small extent.\\
 To find chats for a given day, for example July 19, 2023, search for datecode 20230719 (2023, month 07, day 19).
-====20231025===
+====20231220====
+===Potpourri===
+Videos on Feynman and Computing Pi
+<WRAP prewrap>
+<code>
+:31:54 From Barry Kort to Everyone:
+	Syncthing.
+:32:01 From tedpk to Everyone:
+	Adam Adamandy Kochanski’s approximations of ´ π:
+	reconstruction of the algorithm ∗
+	Henryk Fuks´
+	Department of Mathematics and Statistics,
+	Brock University
+	St. Catharines, Ontario L2S 3A1, Canada
+	Toronto, Ontario M5T 3J1, Canada
+	Email: hfuks@brocku.ca
+	Abstract
+	In his 1685 paper “Observationes cyclometricae” published in Acta Eruditorum, Adam
+	Adamandy Kochanski presented an approximate ruler-and-compass construction for rectifi- ´
+	cation of the circle. It is not generally known that the first part of this paper included an
+	interesting sequence of rational approximations of π. Kochanski gave only a partial explana- ´
+	tion of the algorithm used to produce these approximations, while promising to publish details
+	at a later time, which has never happened. We reconstruct the complete algorithm and discuss
+	some of its properties. We also argue that Kochanski was very close to discovery of continued ´
+	fractions and convergents of π.
+:37:26 From Barry Kort to Everyone:
+	Note:  Adam is NOT Ted’s older brother. ;)
+</code>
+</WRAP>
+[[lexingtoncomputergroup|return]]
+====20231213====
+===Planning meeting===
+<WRAP prewrap>
+<code>
+:21:25 From tedpk to Everyone:
+	Quantum Fields: The Real Building Blocks of the Universe - with David Tong  6,065,075 views  Feb 15, 2017
+	According to our best theories of physics, the fundamental building blocks of matter are not particles, but continuous fluid-like substances known as 'quantum fields'. David Tong explains what we know about these fields, and how they fit into our understanding of the Universe.
+	David Tong is a professor of theoretical physics at Cambridge University, specialising in quantum field theory.https://youtu.be/zNVQfWC_evg?si=N0-udysPRZ4ZS4jT
+:25:09 From Barry Kort to Everyone:
+	Brian Greene “World Science Festival”
+:27:59 From tedpk to Everyone:
+	BBC The Entire Universe 2016
+years ago
+	Eric Idle persuades Professor Brian Cox to present a lecture on the birth of the entire universe. Brian soon realises Eric is actually hosting a comedy and musical extravaganza.
+	Aired December 26th 2016 BBC2. . https://dai.ly/x579m0o
+:38:53 From John Rudy to Everyone:
+	https://www.youtube.com/channel/UCbmNph6atAoGfqLoCL_duAg
+:41:31 From Barry Kort to Everyone:
+	Newton and Pi on “Veritasium” (18 minutes) ~ https://youtu.be/gMlf1ELvRzc
+</code>
+</WRAP>
+[[lexingtoncomputergroup|return]]
+====20231206====
+===Hockney-Falco Thesis on the history of art===
+<WRAP prewrap>
+<code>
+:32:58 From Don Cooke to Everyone:
+	There's camera obscura and camera lucida. My favorite employee, Peter Moeykens, has written an excellent iPhone app called "Camera Lucida". Alas, I'm an Android type and can't use it. (The "half-silvered mirror" device Harry's talking about is a camera lucida, not a camera obscura)
+:36:31 From Bob Primak to Everyone:
+	Camera Lucida AR for Android  https://camera-lucida-ar.en.softonic.com/android
+:41:00 From Don Cooke to Everyone:
+	I got a wonderful tour of Warsaw by a Polish friend who worked for a "cousin" company. He showed me the "Old Town" that had been so badly trashed by Hitler that during restoration they had to revert to paintings by Canaletto, who painted city portraits all over Europe in the 1700s, probably using a camera obscura.
+:23:17 From Judy & Mike Alexander to Everyone:
+	Wall paintings from the Roman period showed three-dimensionality.
+:23:53 From Judy & Mike Alexander to Everyone:
+	I saw this in paintings recovered from Pompeii.
+:23:53 From Bob Primak to Everyone:
+	Mechanical devices have been used to create realistic art for centuries, maybe millennia. Perspective in particular was created using guides and other tools. And there were guide tools to help artists keep a steady hand when drawing lines.
+:28:18 From Don Cooke to Everyone:
+	OMG, this has been fun! I have several tabs open to pursue. Thank you!
+:32:48 From Barry Kort to Everyone:
+	Harry, do you have anything to say (now or in a future Potpourri) about M.C. Escher and/or Teller (of Penn and Teller)?
+:47:54 From Barry Kort to Everyone:
+	James Burke ~ Connections on PBS
+:48:27 From Barry Kort to Everyone:
+	Also, “The Day the Universe Changed.”
+</code>
+</WRAP>
+[[lexingtoncomputergroup|return]]
+====20231108====
+===Update on Chip Manufacturing===
+<WRAP prewrap>
+<code>
+:28:27 From Judy & Mike Alexander To Everyone:
+	FYI - Silicon Photonics, mentioned earlier, was invented locally, at the AF Research Lab group Hanscom AFB (RIP), by Richard Soref
+:48:28 From George Gamota To Everyone:
+	how does industry support universities to provide the skilled workers?
+:17:41 From tedpk To Everyone:
+	Hiding stuff is hard -- but still more reliable than "Open source" for the most critical technology
+</code>
+</WRAP>
+[[lexingtoncomputergroup|return]]
+====20231101====
+===ChatGPT, part 3: How LLMs (Large Language Models) work===
+<WRAP prewrap>
+<code>
+:57:05 From Barry Kort To Everyone:
+	You also can’t share Covid, Flu, or Bad Breath.
+:07:14 From Barry Kort To Everyone:
+	Professor Dumbledore:  “Before I begin, I’d like to say a few words: Nitwit.  Blubber. Oddment.  Tweak.”
+:23:36 From Carl Lazarus To Everyone:
+	Why 12,288 dimensions?  Why not more, why not fewer?
+:25:53 From tedpk To Everyone:
+	The same concepts are being used all of the time by gmail -- but it never learns about "my style" -- a fundamental limitation on by design?
+:26:42 From Mark Edelman To Everyone:
+	I wonder why the numbers in the vector have so many digits in them. Does this “precision” increase with training?
+:32:58 From Carl Lazarus To Everyone:
+	# of dimensions = 3*2**12   was that just a choice of how much they could handle with some amount of computing power?
+:46:09 From Barry Kort To Everyone:
+	In Otter Speech-to-Text, sometimes Otter will go back and change an earlier word.  But GPT locks in a word once chosen, never going back to alter an earlier word.  Would that practice ever become an advance in these narrative language models?
+:48:28 From Carl Lazarus To Everyone:
+	"The sky is blue".  Blue is a good choice after "The sky is" but "is" by itself doesn't particularly map to "blue".  So the whole of the sentence so far determines the probabilities for the next word, correct?  How long a sequence is considered?
+:55:02 From Carl Lazarus To Everyone:
+	So far, this explains how ChatGPT can construct a reasonably sentence or even paragraph based on word relationships.  But how does it take into account the prompt you gave it?
+:20:10 From tedpk To Everyone:
+	It is obvious that the human brain doesn't work in this manner -- we have lots of neurons -- but only a "relative few" are operating at one time [total power consumption is muc too low to work like GPT
+:24:36 From Barry Kort To Everyone:
+	«Bidirectional»
+:30:30 From John Howard To Everyone:
+	How are the indexes of the various vectors computed?  They need to align to compute dot products.
+:55:40 From Barry Kort To Everyone:
+	Propagation of Misconceptions.
+</code>
+</WRAP>
+[[lexingtoncomputergroup|return]]
+====20231025====
+===ChatGPT Part 2: Just how smart is ChatGPT?===
 <WRAP prewrap>
 <code>
@@ Line 48: / Line 182: @@
 ====20231018====
+===ChatGPT Part 1: Introducing ChatGPT===
 <WRAP prewrap>
 <code>
@@ Line 84: / Line 219: @@
 ====20230920====
+===Modulus Arithmetic===
 <WRAP prewrap>
 <code>