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2024lctgmeetingchats [2024.03.20 08:50] – Steve Isenberg2024lctgmeetingchats [2024.09.25 08:50] (current) – Steve Isenberg
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 These are a record of the chats that were passed during meetings in 2024.  They have been edited to a small extent.\\  These are a record of the chats that were passed during meetings in 2024.  They have been edited to a small extent.\\ 
 To find chats for a given day, for example January 10, 2024, search for datecode 20240110 (2024, month 01, day 10). To find chats for a given day, for example January 10, 2024, search for datecode 20240110 (2024, month 01, day 10).
 +
 +====20240904====
 +===AI and the Dead and Covid Update===
 +<WRAP prewrap>
 +<code>
 +10:22:22 From Barry Kort to Everyone:
 + Ignoble 2024 https://www.youtube.com/watch?v=ukBwV9Lap2A
 +10:23:32 From Seth Silverman to Everyone:
 + Hi all. This is Seth Silverman.  I’m one of the “new guys”. I am double booked and have to drop. I am happy to help with the previous 10/2 NAS topic if you end up not being able to fill another topic and the speaker is Ok keeping the previous date.
 +11:07:09 From Barry Kort to Everyone:
 + https://www.sci.news/astronomy/2024-pt5-earth-mini-moon-13280.html
 +11:07:24 From Barry Kort to Everyone:
 + https://www.npr.org/2024/09/21/nx-s1-5121914/mini-moon-earth-asteroid
 +11:08:19 From Larry Wittig to Everyone:
 + Re Inter net speed: Most folks use Wi-Fi which may cut the speed at your viewing device in half.
 +11:14:21 From Larry Wittig to Everyone:
 + Sabrina is now very down on on Physics on how it is praticed at universities. Too much emphasis on turn out a large number of published papersvs. doing useful projects. She has a video on this.
 +11:15:13 From Barry Kort to Everyone:
 + https://www.youtube.com/watch?v=06-iq-0yJNM&pp=ygUbYnJpYW4gZ3JlZW4gYWkgY29uc2Npb3VzbmVz  and  https://www.youtube.com/watch?v=06-iq-0yJNM&pp=ygUbYnJpYW4gZ3JlZW4gYWkgY29uc2Npb3VzbmVz   both are 45 minutes on consciousness
 +11:16:00 From Barry Kort to Everyone:
 + That’s Brian Greene World Science Festival episodes with different guests.
 +11:17:29 From Barry Kort to Everyone:
 + Sabine is mostly a critic and debunker of problematic science news.
 +11:22:09 From Barry Kort to Everyone:
 + Also, two from Brian Greene on AI ~ https://www.youtube.com/watch?v=EGDG3hgPNp8&t=815s&pp=ygUbYnJpYW4gZ3JlZW4gYWkgY29uc2Npb3VzbmVz  and https://www.youtube.com/watch?v=7wznuB0sKlw&pp=ygUbYnJpYW4gZ3JlZW4gYWkgY29uc2Npb3VzbmVz  Both about 40 minutes.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +====20240904====
 +===AI and the Dead and Covid Update===
 +<WRAP prewrap>
 +<code>
 +10:11:14 From John Rudy to Everyone:
 + so i assume that in 10 years it [ability to deep-fake your ancestors] might be pretty good
 +10:14:48 From Drew King to Everyone:
 + MS-DEFCON 4: Side effects for dual booters
 +10:17:06 From tedpk to Everyone:
 + https://www.cell.com/action/showPdf?pii=S2666-3864%2824%2900436-3
 +10:20:23 From Barry Kort to Everyone:
 + Language is a tool for encrypting information.
 +10:31:37 From Bob Primak to Everyone:
 + This summer I had COVID, and was up and around. Not even testing positive for a day or two.
 +10:38:13 From Judy & Mike Alexander to Everyone:
 + Bob - How do you know it wasn't a "flu"
 +10:40:47 From Bob Primak to Everyone:
 + Because I did test positive on Day Two or Three, and remained positive for 14 days thereafter. I also got very run down on Day Three, and had classic COVID cymptoms, including respiratory difficulties.
 +11:04:24 From Mitch Wolfe to Everyone:
 + HHS Paxlovid: https://aspr.hhs.gov/COVID-19/Therapeutics/Products/Paxlovid/Pages/default.aspx [article on Paxlovid, a preferred oral antiviral drug to treat COVID-19]
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +====20240828====
 +===Euclid Telescope===
 +<WRAP prewrap>
 +<code>
 +11:14:22 From Barry Kort to Everyone:
 + As the universe expands, the interstices between galaxies become increasingly vacant and distant from receding galaxies, so that time speeds up in those interstices.
 +11:16:29 From Barry Kort to Everyone:
 + Time also runs faster on the moon than on the earth.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +====20240807====
 +===Metcalfe: Connectivity===
 +<WRAP prewrap>
 +<code>
 +10:08:55 From Bob Primak to Everyone:
 + What they did not list was that Bob co-invented ethernet.
 +10:48:09 From Judy & Mike Alexander to Everyone:
 + My friends from Xerox say that it was uncompetitive in computers because top management was wedded to COPIERS.
 +10:50:11 From Carl Lazarus to Everyone:
 + When AT&T tried to get into computers, it failed miserably.  Perhaps it was also a case of a monopoly having the wrong mindset for a competitive industry.
 +10:50:29 From Tim O'Neal to Everyone:
 + I saw you explain Ethernet at the PA HomeBrew Computer Club.  At what point in your career did you appreciate the analogy between numbers of connections to a device as contrasted to the speed and size of a device, i.e. Moore's Law vs. Metcalfe's Law?
 +10:52:21 From Steve Isenberg to Everyone:
 + Note that this is a recording and not a live presentation.
 +10:58:11 From Harry Forsdick to Everyone:
 + Re his new work — let’s remember he is getting close to 80.  Astonishing…
 +11:08:31 From Barry Kort to Everyone:
 + From Boolean Logic to “Fuzzy” Logic (Continuous-Valued Logic) to Combinatorial Logic.
 +11:20:14 From Steve Isenberg to Everyone:
 + From Wikipedia: In automata theory, combinational logic is a type of digital logic that is implemented by Boolean circuits, where the output is a pure function of the present input only. This is in contrast to sequential logic, in which the output depends not only on the present input but also on the history of the input.
 +11:21:33 From Barry Kort to Everyone:
 + Isn’t that a Markov Model?  The current state is all that is available, and not the history of how we got to the current state.
 +11:23:01 From Barry Kort to Everyone:
 + The company, Y-Combinator, takes its name from the fundamental unit of Combinatorial Logic, called a Combinator.
 +11:23:41 From Barry Kort to Everyone:
 + As I understand it, a Combinator is a species of Function.
 +11:25:04 From Barry Kort to Everyone:
 + See the introductory book by Raymond Smullyan, “To Mock a Mockingbird” for a beginner’s guide to Combinatory Logic.
 +11:33:00 From Barry Kort to Everyone:
 + “The Inner Game of Tennis”
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +====20240731====
 +===History of Computers 1969-1994===
 +<WRAP prewrap>
 +<code>
 +10:03:02 From Jerome Slate to Everyone:
 + What is the origin of the word byte?
 +10:05:23 From Barry Kort to Everyone:
 + Gemini sez …
 + «The term "byte" was coined by Werner Buchholz in 1956.
 + 1. Werner Buchholz - IEEE Computer Society www.computer.org
 + He was working on the IBM Stretch computer at the time and wanted a term for a group of bits. He originally considered "bite" but changed it to "byte" to avoid confusion with "bit".  
 + 1. Werner Buchholz Coins the Term "Byte", Deliberately Misspelled to Avoid Confusion with Bit www.historyofinformation.com
 + Interestingly, the number of bits in a byte wasn't initially fixed, but it eventually standardized to eight bits. »
 +10:06:01 From Steve Isenberg to Everyone:
 + Bit is a contraction of Binary Digit.
 +10:06:19 From Bob Primak to Everyone:
 + First use of the word "byte" by Werner Buchholz in June 1956: 
 + http://archive.computerhistory.org/resources/text/IBM/Stretch/pdfs/06-07/102632284.pdf
 + And yes, this was an IBM Stretch computer.
 +10:08:17 From Bob Primak to Everyone:
 + The name [bit] is a portmanteau of binary digit. (Wikipedia)
 +10:11:50 From Barry Kort to Everyone:
 + Analog Computers were entirely programmed with patch panels.
 +10:13:47 From Bob Primak to Everyone:
 + My brother and I had the "digicomp" toys, which were programmed with metal rods.
 +10:20:26 From Stan Rose to Everyone:
 + https://multicians.org/thvv/7094.html
 +10:23:14 From Carl Lazarus to Everyone:
 + A T1 was 1.5Mbits/sec
 +10:24:27 From Bob Primak to Everyone:
 + Al Gore was the first political leader to recognize the importance of the
 + Internet and to promote and support its development.
 + Al Gore and the Internet
 + By Robert Kahn and Vinton Cerf
 + https://web.eecs.umich.edu/~fessler/misc/funny/gore,net.txt
 +10:25:24 From Carl Lazarus to Everyone:
 + Amazon was originally named "Cadabra".  Some people thought it was "Cadaver", not so good.
 +10:28:12 From Carl Lazarus to Everyone:
 + The first proposal for a survivable military network was done at the RAND corporation, by Paul Baran.  This was separate from DARPA.
 +10:32:36 From Judy & Mike Alexander to Everyone:
 + Modems were (I think) used as early as World War II.  MODEm stands for modulate/demodulate.
 +10:33:58 From Bob Primak to Everyone:
 + In 1941, the Allies developed a voice encryption system called SIGSALY which used a vocoder to digitize speech, then encrypted the speech with one-time pad and encoded the digital data as tones using frequency shift keying. This was also a digital modulation technique, making this an early modem. (Wikipedia)
 +10:43:47 From John Rudy to Everyone:
 + I remember now, the T1 was 1.544 megabits/sec and was quite expensive, hundreds of dollars/month
 +10:56:41 From Barry Kort to Everyone:
 + How many voice channels does a T1 line carry?
 +10:57:37 From Adam Broun to Everyone:
 + 24
 +10:57:52 From Barry Kort to Everyone:
 + Gemini sez…
 + «A T1 line can carry 24 voice channels.  
 + 1. What is a T1 Line? - GoTo www.goto.com
 + It's important to note that one of these channels is typically used for signaling information (like caller ID), leaving 23 channels for actual voice communication.  
 + 1. What is a T1 Line and How Fast is T1 Internet? - One Ring Networks oneringnetworks.com»
 +11:14:03 From Barry Kort to Everyone:
 + BBN developed the Interface Message Processor (IMP) for packet switching.
 +11:17:06 From Barry Kort to Everyone:
 + DECnet, Ethernet, AppleTalk, and UUNET.
 +11:19:07 From Barry Kort to Everyone:
 + The press release for the BBN IMP was misreported as the Interfaith Message Processor.
 +11:19:28 From Mitch Wolfe to Everyone:
 + OSI model
 + by layer
 + 7.  Application layer
 + 6.  Presentation layer
 + 5.  Session layer
 + 4.  Transport layer
 + 3.  Network layer
 + 2.  Data link layer
 + 1.  Physical layer
 +11:25:36 From Bob Primak to Everyone:
 + Paul Baran and Donald Davies independently invented the concept of digital packet switching used in modern computer networking including the Internet.[1][2][3]
 +11:25:45 From Bob Primak to Everyone:
 + (Wikipedia)
 +11:27:05 From Barry Kort to Everyone:
 + Packet Switching was an evolutionary advance based on Time-Division Multiplexing.
 +11:29:26 From Barry Kort to Everyone:
 + Captain Crunch (toy whistle) imitated the tones of In-Band Signalling.
 +11:33:23 From Bob Primak to Everyone:
 + Another spoofing of the universal signaling tones involves creating a voice-mail message which begins with the three-tone signal that the number is out of service. This disconnects most robo-dialers for spam calls.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +====20240717====
 +===Developing the Abiocor total artificial heart===
 +<WRAP prewrap>
 +<code>
 +10:10:59 From John Rudy to Everyone:
 + In 1971 my brother worked for GE. They developed a unit to oxygenate blood during an operation when the body couldn't do it.  Thy were 3 times as successful as alternative devices.  But it turned out that one of the  pieces of the machine was built using a piece of material built in a machine that has asbestos.  No asbestos in the part, but the process got shut down and his machine came off the market.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +====20240703====
 +===Buying a Computer===
 +<WRAP prewrap>
 +<code>
 +10:41:51 From Bob Primak to Everyone:
 + CPU-X works like CPU-Z for Linux. Mac is still in its own world, as far as I can tell.
 +10:42:17 From Bob Primak to Everyone:
 + https://thetumultuousunicornofdarkness.github.io/CPU-X/
 +10:43:30 From Bob Primak to Everyone:
 + Mac system info is in the Mac interface itself.
 +11:03:34 From Drew King to Everyone:
 + https://www.neowin.net/news/windows-10-will-get-five-years-of-additional-support-thanks-to-0patch/
 +11:04:53 From Drew King to Everyone:
 + 0patch is a yearly subscription that costs 24.95 EUR (~$27)
 +11:28:53 From Larry W. to Everyone:
 + Usb-c is 40 GB/s; hdmi2 is 18 GB/s 
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]] 
 +
 +
 +====20240619====
 +===5G & Beyond Update===
 +<WRAP prewrap>
 +<code>
 +10:15:36 From Steve Isenberg to Everyone:
 + Would these frequencies be the ones your phone would need to cover to use 5G?
 +10:31:26 From Stan Rose to Everyone:
 + What is the advantage of having the label "advanced broadband", other than faster is better
 +10:42:19 From Stan Rose to Everyone:
 + Just like the rollout of 5g last year was delayed by the fear of airport interferwnce
 +11:12:52 From Mitch Wolfe to Everyone:
 + Is China participating in IMT-2030? In what role?
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
 +====20240529====
 +===Oppenheimer===
 +<WRAP prewrap>
 +<code>
 +10:52:25 From Judy & Mike Alexander to Everyone:
 + I had read that Ernest Lawrence proposed and lobbied for Oppenheimer as the chief at Los Alamos.
 +10:57:14 From Judy & Mike Alexander to Everyone:
 + Oppenheimer had created a theoretical physics group at UCal Berkeley and thus developed a modicum of leadership/managerial skills.  He was one of the best-known American-born theoretical physicists in the US.
 +11:07:27 From Barry Kort to Everyone:
 + Emma Noether.
 +11:10:07 From Barry Kort to Everyone:
 + Noether’s Theorem established a relationship between Symmetry and Conservation.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +====20240515====
 +===Spacecraft Technology===
 +<WRAP prewrap>
 +<code>
 +10:17:23 From Judy & Mike Alexander to Everyone:
 + "Design lifetime":  Please explain how that number has been arrived at.
 +10:18:55 From Steve Isenberg to Everyone:
 + Has any thought been given to Space Elevators?
 +10:19:06 From Bob Primak to Everyone:
 + While the program never actually lofted a crewed space station, those nearly six years were quite eventful, featuring the selection of 17 MOL astronauts, the remodeling of NASA's two-seat Gemini spacecraft, the development of the Titan-3C launch vehicle and the building of an MOL launch site at Vandenberg Air Force Base in California. 
 +
 + Cancelled in June, 1969.
 +
 + Declassified: US Military's Secret Cold War Space Project Revealed
 + https://www.space.com/31470-manned-orbiting-laboratory-military-space-station.html
 +10:28:48 From Carl Lazarus to Everyone:
 + Needham has an elementary school named after Suni Williams
 +10:29:10 From Stephen Quatrano to Everyone:
 + https://en.wikipedia.org/wiki/Sunita_Williams
 +10:34:57 From Adam Broun to Everyone:
 + Is “up” the same direction throughout the ISS?
 +10:38:19 From Steve Isenberg to Everyone:
 + Would it be possible (availability, permission, technology) for us to have an astronaut on the space station present to our group?
 +10:43:44 From Larry Wittig to Everyone:
 + How do you provide water, is some of it from fuel cells?
 +10:51:01 From John Rudy to Everyone:
 + see info on Gary: https://www.nasa.gov/people/dr-gary-kitmacher-nesc-academy-biography/
 +10:53:29 From Larry Wittig to Everyone:
 + Is NASA looking into non-chemical propulsion?
 +10:54:49 From Barry Kort to Everyone:
 + It looks like the Sci-Fi writers completely missed the boat with their concept of “flying saucer” geometry for spacecraft design..
 +11:01:26 From Judy & Mike Alexander to Everyone:
 + Since the moon's surface is rough, how will such a long rocket be stabilized upright when it lands?
 +11:04:18 From Adam Broun to Everyone:
 + For the gateway station, isn’t getting into a rectilinear orbit very expensive? Or is there some neat trick to get there?
 +11:08:09 From Adam Broun to Everyone:
 + Replying to "For the gateway stat..."
 +
 + Next slide partially answered it- assembly in moon orbit
 +11:23:16 From John Rudy to Everyone:
 + Frank Herbert had it right with Dune for water reclamation
 +11:25:36 From Stephen Quatrano to Everyone:
 + What have you learned about public/private collaboration over the course of your career?  How do private entities vs public entities manage risk differently?  How has collaboration changed over time if at all?
 +11:33:42 From Stephen Quatrano to Everyone:
 + Replying to "What have you learne..."
 +
 + Quality and trust are other dimensions of collaboration that interest me.
 +11:33:56 From tedpk to Everyone:
 + AMS -- Alpha Magnetic Spectrometer --- has been on ISS and Billions of Cosmic Rays have been observed -- No statements about Very High  Energy Cosmic Ray  Exposure for extended  duratiuons
 +11:45:35 From John Rudy to Everyone:
 + how can you bring something so huge down safely
 +
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
 +====20240508====
 +===Inflammation===
 +<WRAP prewrap>
 +<code>
 +10:28:27 From tedpk to Everyone:
 + Where do histamines fit into all this -- since this is the height of Seasonal Respiratory Allergies?
 +10:57:07 From Judy & Mike Alexander to Everyone:
 + The prediction quote is attributed to Yogi Berra, not Niels Bohr
 +11:18:38 From Bob Primak to Everyone:
 + The allergy discussion raises my own experience with a recently discovered severe allergy. I_t was very specific.
 +11:18:56 From Bob Primak to Everyone:
 + I am undergoing treatments for my severe sting allergy.
 +11:19:31 From Barry Kort to Everyone:
 + • It’s hard to unlearn a chronic negative reaction to an irritating stimulant.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
 +====20240501====
 +===Five Levels of Difficulty Day===
 +<WRAP prewrap>
 +<code>
 +10:07:16 From Bob Primak to Everyone:
 + For travel backward in time, has anyone solved the paradox of conservation of energy and mass?
 +10:12:12 From Bob Primak to Everyone:
 + As an absolute physical constant, the speed of light recently has been questioned. Over long times and distances, some theorists seem to think light may be slowing down.
 +10:19:43 From Bob Primak to Everyone:
 + Chicken and egg -- the first chicken did not come from a chicken egg -- it came from a dinosaur egg!
 +10:20:05 From Bob Primak to Everyone:
 + (Not chickens specifically, but birds, generally.
 +10:27:19 From Jerome Slate to Everyone:
 + To know which came first, the chicken or the egg, order both from Amazon.  You will soon know which came first.
 +10:31:30 From Stan Rose to Everyone:
 + Interesting that these are all ideas in the Netflix series, 3 Body Problem!
 +10:33:56 From Bob Primak to Everyone:
 + I ordered a chicken and an egg from Amazon. The chicken was at Whole Foods before I ordered it. (It was already in my cart.) What does this result prove?
 +10:39:32 From Dan Silber to Everyone:
 + I have long agreed with Bob - eggs came into existence before chickens.
 +10:43:24 From Adam Broun to Everyone:
 + https://theoreticalminimum.com/courses/general-relativity/2012/fall
 + All the courses in this series are terrific if you want to go  that deep
 +10:55:58 From Judy & Mike Alexander to Everyone:
 + Eggs must be fertilized before there are chickens.  "Chicken vs. egg" is incomplete.
 +10:57:02 From Bob Primak to Everyone:
 + We should be careful about eliminating the genes responsible for allergies. There are some scientists who think allergies are part of our very complex immune systems. Change one part of this system, and unpredictable effects can happen elsewhere in the immune system.
 +10:57:09 From Barry Kort to Everyone:
 + Brand new 37-minute video from Veritasium on black holes, white holes, wormholes and parallel universes, entitled, “Something Strange Happens When You Follow Einstein's Math” ~ https://youtu.be/6akmv1bsz1M
 +10:59:40 From Steve Isenberg to Everyone:
 + Veritasium has good presentations, we’ve seen some in the past.  I’ll put this on the Potentials list, maybe we can show it in a potpourri.
 +11:00:43 From Barry Kort to Everyone:
 + Derek Muller of Veritasium is a world-class science educator and explorer on YouTube.
 +11:01:28 From Bob Primak to Everyone:
 + "Designer Genes" could have ethical and population health consequences. Diversity has been one key to genetic evolution. This process is necessary when, not if the Earth's environment changes radically in the future. (No implication of human causality in these changes is needed to see this issue.)
 +11:05:14 From Bob Primak to Everyone:
 + Ack!! Did they just refer to human genetics as a "hard drive??
 +
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
 +====20240424====
 +===Planning meeting===
 +<WRAP prewrap>
 +<code>
 +10:14:41 From Barry Kort to Everyone:
 + Altruism:  Private Support of Science and Education.
 +10:15:44 From Barry Kort to Everyone:
 + On Quantum Tech, there are a few YouTube videos from Sabine Hossenfelder on various aspects of that.
 +10:24:32 From Barry Kort to Everyone:
 + Shelf Life of Vaccines and Covid Tests.
 +10:25:13 From Barry Kort to Everyone:
 + “Push to DISTANT future."
 +10:40:28 From Bill Quinn to Everyone:
 + We have only an email address for Donald Cooke
 +10:43:08 From TedK to Everyone:
 + Thermoplastic polymers are extruded from a printer dubbed the “Factory of the Future 1.0," said Habib Dagher, director of UMaine’s Advanced Structures & Composite Center, where both of the current printers are located. It combines robotics operations with new sensors, high-performance computing and artificial intelligence, Dagher said.
 +10:54:42 From Barry Kort to Everyone:
 + There are probably copious predictions about AGI.
 +10:59:26 From Barry Kort to Everyone:
 + John R. Pierce (V.P. of Bell Labs) wrote a great book, “Signals: The Telephone and Beyond.”
 +11:09:24 From Barry Kort to Everyone:
 + ADT Alarms (American District Telegraph).
 +11:24:40 From Barry Kort to Everyone:
 + Related to aging hardware,  one can continue with older Macintosh hardware with Open Core Legacy Patcher (OCLP) which allows older machines to run newer versions of MacOS.
 +11:30:33 From Steve's displays to Everyone:
 + Jerry: for video work, you need Intel i7 processor, 16GB or more RAM, and a fast video processor.
 +11:35:46 From Barry Kort to Everyone:
 + Angels on the head of a pin was in the MIT Museum Tour video.
 +11:36:09 From Peter Albin to Everyone:
 + thx Barry,I forgot!
 +11:36:25 From Barry Kort to Everyone:
 + Reacted to "thx Barry,I forgot!" with 👍
 +11:40:30 From Barry Kort to Everyone:
 + Synology DiskStation and other species of NAS (Network Attached Storage).
 +11:44:28 From Larry W. to Everyone:
 + In the discussion of buying a new PC, storage is so cheap that you should just buy 1 of 2 TB. Right now you can buy 1 TB SSD for $50.
 +11:50:48 From Steve Isenberg to Everyone:
 + Contact us: LCTG@toku.us
 +
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
 +====20240403====
 +===About Eclipses===
 +<WRAP prewrap>
 +<code>
 +09:53:53 From Barry Kort to Everyone:
 + PBS NOVA will probably produce an episode on the topic.
 +10:02:55 From Bob Primak to Everyone:
 + That airs tonight on PBS-2.
 +10:05:37 From Bob Primak to Everyone:
 + Great American Eclipse
 + Explore the spectacular cosmic phenomenon of a total solar eclipse.
 + PREMIERES: 4/3/24 8pm
 +10:12:04 From John Rudy to Everyone:
 + See Mark Twain's A Connecticut Yankee in King Arthur's Court.  Chapter 6 is the eclipse
 +10:19:28 From Barry Kort to Everyone:
 + In the Lewis & Clark Expedition, they relied on a predicted eclipse that would occur when they were in the Montana Territory to calibrate their clock and fix their exact position on that day, thus improving the reliability of their map making along the journey.
 +10:33:42 From Bob Primak to Everyone:
 + On Mars, eclipses (transits) don't block out the Sun, due to the small sizes of the Martian moons.
 +10:33:54 From Mitch Wolfe to Everyone:
 + Moon "distance from Earth varies between 225,700 miles (363,300 kilometers) and 252,000 miles (405,500 kilometers)." [About 10% diff.]
 +10:36:52 From Judy & Mike Alexander to Everyone:
 + the increase in the size of the moon's orbit is due to conservation of angular momentum: because of friction due to earth- and moon-tides, the spin of the earth slows down; the orbit of the moon "compensates" to conserve the total angular momentum of earth-plus-moon.
 +10:53:04 From Bob Primak to Everyone:
 + The Northeast, from western Pennsylvania into Maine, have the best shot at seeing clear skies and limited cloud cover. Eclipse forecast for Monday, April 8, 2024.
 +10:54:59 From John Rudy to Everyone:
 + apparently there have been many ads for bogus glasses
 +10:56:09 From Bob Primak to Everyone:
 + Buying glasses in-person (or getting them for free)
 + If you'd prefer to buy a pair of approved eclipse glasses in person, the AAS recommends stopping by a Home Depot, Lowe's or Walmart to check if they have any in stock. (Some, but not all, locations sell ISO-approved eclipse glasses, according to the AAS.) Additionally, many libraries around the U.S. will be giving away free pairs of approved eclipse glasses; call your local branch
 +11:00:53 From tedpk to Everyone:
 + certain degree of unpreparedness for example the diamond ring and the less well known Bailey's beads and the Ruby necklace -- all of which relate to lunar non-spheroidicity
 +11:02:33 From tedpk to Everyone:
 + another problem with the discussion -- there is a confusion between scattering and refraction in the atmosphere
 +11:04:03 From John Rudy to Everyone:
 + best viewing is from the NASA videos
 +11:10:11 From John Rudy to Everyone:
 + blue moons roughly every 2.7 years on average.
 +11:11:08 From Steve Isenberg to Everyone:
 + But how could you see the eclipse in a plane with windows facing out the side of the plane?
 +11:11:24 From Bob Primak to Everyone:
 + An airliner can't outpace the shadow of the moon during an eclipse. So the advertised "eclipse flights" will not have much of an extended view of totality. Just, the planes will be above the clouds, so nearly certainly passengers will see the eclipse.
 +11:13:49 From John Rudy to Everyone:
 + I was on a plane flying near mt Everest.  Everyone moved to the right side of the plane to see the mountain.   So maybe 10,000 pounds moved sides.  Didn't notice any impact
 +11:14:58 From Steve Isenberg to Everyone:
 + The pilot would apply some changes to the airplane’s controls automatically to maintain level flight.
 +11:15:25 From Bob Primak to Everyone:
 + Problem is that the angle from which the sun is shining (Azimuth) is at a somewhat inconvenient angle compared to flight path. From the plane’s view the sun (and thus eclipse) would be about 7 or 8 o clock when looking at a clockface. Therefore the best would be that when totality shadow starts (or right before), the plane flies in a more northern direction or even a bit northeastern so most people on board would be able to see it clearly since we would then be at a right angle towards the eclipse (9 of clock). But this requires either that the pilot is a bit flexible (like the SW pilot in 2023 who did some zig zags as spur of the moment) or needs proper flight path planning which is what Alaska airlines did.
 +11:16:20 From Bob Primak to Everyone:
 + In this flight path, the pilot does some zig-zags to let passengers on either side of the plane to have a view.
 +11:16:34 From tedpk to Everyone:
 + Airliner should get you above most of the clouds -- so it could be useful -- the SR-71 once flew along the path of totality fast enough to "make time stand still" by doubling the length of totality
 +11:17:36 From Steve Isenberg to Everyone:
 + But the stars would come out during totality, like they do at night
 +11:19:56 From John Rudy to Everyone:
 + Anecdotally, I just heard there was a spike in births 9 months after the Chicago Cubs won the World Series.  Might the same be true with eclipses.   Or is this bogus?  Probably
 +11:21:01 From Bob Primak to Everyone:
 + A nova, not comet, will be present possibly during this eclipse.
 +11:21:38 From Bob Primak to Everyone:
 + About the Cubs and births, yes this was a local legend. Don't know about "eclipse babies".
 +11:22:50 From Mitch Wolfe to Everyone:
 + Some of the speaker's slides are from https://www.greatamericaneclipse.com/ that has a lot of related materials.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
 +====20240327====
 +===MIT Museum===
 +<WRAP prewrap>
 +<code>
 +09:59:23 From Barry Kort to Everyone:
 + Sabine Hossenfelder ~ Science without the gobbledygook.
 +11:16:43 From CK to Everyone:
 + there once was a nautical museum. Is there still? And is it related to this one?
 +11:19:09 From Barry Kort to Everyone:
 + Much of the Computer Museum artifacts when to the comparable museum in San Jose CA.
 +11:19:56 From Barry Kort to Everyone:
 + Boston Museum of Science has a small room with some of the artifacts.
 +11:21:43 From Larry W to Everyone:
 + The nautical museum was shut down ~1970 during the anti-war protests. I don't know if ever reopened.
 +11:23:16 From Stephen Quatrano to Everyone:
 + I believe there is still an extensive collection of nautical devices, designs and artifacts in the museum.  They were indeed a core of the old museum.  I don’t know if they are in the new displays.
 +</code>
 +</WRAP>
 +[[lexingtoncomputergroup|return]]
 +
  
 ====20240320==== ====20240320====
2024lctgmeetingchats.1710949830.txt.gz · Last modified: 2024.03.20 08:50 by Steve Isenberg