08:40:43 From Will Marchant : KW4WZ 08:40:51 From Robert De Cesaris to Jim Bready(Privately) : jim are we all muted? 08:40:57 From Robert De Cesaris to Jim Bready(Privately) : not hearing anything 08:41:49 From Curtis Jones : Good morning from San Jose, California. 08:41:57 From Robert De Cesaris to Jim Bready(Privately) : never mind all set had the volume turned down last night since the battery kept binging keeping Cami up 08:44:13 From Will Marchant : This https://www.ssl.berkeley.edu/about/view/ is the webcam from my telecommuting employer. A few days ago it was just an orange glow. 08:45:14 From Robert De Cesaris to Jim Bready(Privately) : Looks like we are not talking over one another even though we are up to almost 50 a good sign 08:46:48 From Jim Bready to Robert De Cesaris(Privately) : Yes, very civilized. 08:49:40 From Curtis Jones : Will, Just looked at your link. Really dismal! Tnx. 08:50:34 From Simon van der Salm : Hii to everyone 08:53:03 From Curtis Jones : With Zoom everyone gets a different screen layout! 08:56:26 From Curtis Jones : Miss the macadamia nuts. 08:56:56 From Curtis Jones : Richard - what's the plot behind you? 09:02:07 From Mike Frey : Perfect day received a Slide Rule from the Netherlands in the mail. 09:05:23 From Andrew Pizor : Got my new Wern System circular rule a few days ago - looking forward to learning how to use it. 09:05:45 From Vinarcik : Good for you guys! 09:07:01 From Nathan Zeldes to Jim Bready(Privately) : I hope you plan to share the slides so we can have the links (and better know our peers) 09:10:05 From Vinarcik : I'd suggest you mute unless you're talking. Keeps background noise down. 09:11:42 From Jerry McCarthy : Agreed. I think the host can mute everybody and only allow the current speaker to unmute. 09:12:13 From Andrew Pizor : If you're having bandwidth problems, you might want to try using your telephone for audio 09:17:24 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Hi everyone. Just after 2AM here right now in eastern Australia. All you folks are coming through here well. 09:18:05 From Nathan Vinarcik : RPN is the one true calculator notation. 09:18:16 From Jerry McCarthy : "Like" 09:18:22 From Curtis Jones : RPN forever! 09:18:33 From Will Marchant : Ditto, RPN is great! 09:18:46 From Vinarcik : Agreed...when I was in school real men used HPs and RPN...none of that new-fangled TI algebraic! 09:18:55 From Tom Frank (KA2CDK) : slide rules take up less space than race cars šŸ˜Š 09:19:08 From Nathan Zeldes : Hear hear. Of course HP probably found it cheaper to produce, and convinced us it was better :-) 09:19:24 From jeff white : Here, here! HP was king with RPN! 09:19:27 From Vinarcik : Well, it's demonstrably faster due to fewer keystrokes! 09:19:31 From Jerry McCarthy : Hey. Do we have two people called "Vinarcik" here? 09:19:40 From Vinarcik : Yes. Father and son. 09:19:52 From Jerry McCarthy : OK! 09:20:35 From Will Marchant : Hopefully the RPN folks follow www.swissmicros.com 09:21:21 From Michael Konshak : send ISRM a scan 09:25:20 From Michael J. Vinarcik : Thanks for sharing swissmicro.com that was new to me! 09:26:24 From Curtis Jones : Tom, What is 20 log R used for? 09:26:31 From David Rance (NL) : Tom, who made yj OHP rules? 09:26:57 From Curtis Jones : Yup. dB = 20 log (v2/v1) 09:30:17 From Tom Frank (KA2CDK) : OHP slide rules were available from many manufacturers; they are visible representation of the makers rules. 09:31:04 From Michael J. Vinarcik : Forbidden Planet! 09:31:12 From Michael J. Vinarcik : C57D forever! 09:31:58 From David Rance (NL) : Tom, I agree but I suspect most were NOT made in-house. It looks like many were made by the same 3rd party but I could never work out who that was. 09:36:57 From Curtis Jones : California State University has announced that most classes will be online in spring 2021. 09:37:35 From Tom Frank (KA2CDK) : Agreed; Iā€™ve surmised three different manufacturers. Iā€™ve identified one of them. 09:37:54 From Curtis Jones : It's sad, but probably wise to expect IM2021 might not be live. 09:38:28 From Curtis Jones : Thank you Wolfgang 09:40:31 From Michael J. Vinarcik : Agree. It's sad... 09:40:43 From Michael Konshak : have space suit will travel 09:40:54 From Will Marchant : Great article subject, Rob! 09:41:12 From Michael J. Vinarcik : Red Planet! Rocket Ship Galileo! 09:41:24 From Nathan Vinarcik : Starship Troopers! 09:43:50 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Just wondering how are we each called up for the intro? 09:44:09 From Michael J. Vinarcik : Alphabetical 09:44:19 From Michael J. Vinarcik : Did you send it in late? 09:44:29 From Jerry McCarthy : Did you send in a slide? 09:44:35 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : A couple of days ago. 09:45:00 From Jerry McCarthy : Hmmm. 09:45:21 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : I can resend it if you tell me which email. 09:46:47 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : I have both word doc and pdf 09:47:03 From Clay Helberg : Zoom tip: if you want to show an object on camera, first disable your virtual background 09:47:17 From Jerry McCarthy : It was Bob de Cesaris who was collating them. 09:54:02 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Robert I just emailed my pdf 09:55:47 From Curtis Jones : https://www.computerhistory.org/collections/search/?s=Konshak gets ca. 859 hits 10:02:56 From Stefan Heimann : Would it be possible to distribute the introduction slides to all attendees, when everyone agrees? 10:04:46 From Will Marchant : Yes, lots of great info in these intro slides! Iā€™d like a copy, too. 10:05:18 From Gabriel Vanderdonck : Everyone will ! 10:10:35 From Tom Frank (KA2CDK) : Potato chips without the calories... 10:12:42 From Mike Syphers : Any comments on my new site would be very welcome; still learning, editing and correcting errors. Thanks. followingtherules.info 10:13:20 From Michael J. Vinarcik : Well said, John! 10:14:58 From Michael Konshak : simon unmute 10:18:30 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Antikythera is an amazing device. 10:19:21 From Tom Frank (KA2CDK) : Michael; are you aware of any airship specific slide rules? Member of the NLHS... 10:19:44 From Jerry McCarthy : I gave a talk some time ago about the AKM and my simulator at one of the IMs in Greifswald, Germany. 10:19:47 From Michael Konshak : Love Scouting! 10:20:02 From Rob James : Eagle Scout here too! 10:24:03 From Joseph Cain : Also Eagle Scout and Order of the Arrow! 10:24:17 From Nathan Vinarcik : I made Brotherhood in OA. 10:26:01 From Curtis Jones : Robert - try turning off your camera. 10:26:31 From Curtis Jones : Hear you better with the camera turned off. 10:34:36 From Michael J. Vinarcik : Gerald Bull was a real character! 10:37:14 From Tom Frank (KA2CDK) : Paris Kanonen - the Paris Gun and Project HARP by G.V. Bull and C.H. Murphy ISBN 3-8132-0304-2 c1988 10:40:47 From Michael J. Vinarcik : Isp is why Project Orion was so alluring... 10:47:53 From Michael J. Vinarcik : My company released a sample system model based on Ranger! 10:48:12 From Michael J. Vinarcik : Pluto forever! 10:48:33 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Ceres too!! 10:52:16 From Rob James : Gutter said Pluto 4300 km radius? seems too large 10:53:46 From Michael Allison : Now known to be 1188 km. 10:54:29 From Tom Frank (KA2CDK) : S5 was RP-1/LOX for first stage 10:55:46 From Michael J. Vinarcik : http://www.projectrho.com/public_html/rocket/astrodeck.php 10:55:51 From Michael Konshak : can i get a file of the manual? 10:56:09 From Michael J. Vinarcik : https://www.computerhistory.org/collections/catalog/102746940 10:59:01 From Michael J. Vinarcik : Arguably the capsule architecture doesn't suffer from failure modes like the Shuttle had (heat shield protected). 11:01:42 From Will Marchant : The Martin Space Rule Handbook is available to download at https://www.computerhistory.org/collections/catalog/102746940 11:10:31 From Nathan Vinarcik : Really nice. 11:13:18 From Zoetermeer : Robert, try a headset, that sometimes improves quality 11:25:18 From Will Marchant : Hey, Bibb, letā€™s stay in touch about the Martin Space Rule. My http://www.ssl.berkeley.edu/~marchant/ page has my work email: marchant@ssl.berkeley.edu 11:25:55 From David Rance (NL) : John, I just checked my 3 Richardson's but sadly no combined Richardson/Gilson 11:30:45 From Michael J. Vinarcik : Peter: That's sad! 11:30:57 From Nathan Vinarcik : It is 11:31:15 From Ajit de Silva : it would be an honor to buy a slide rule from the original mfg 11:31:52 From Wayne : I believe Concise is still selling their circulars. 11:32:16 From Rob James : Concise No. 300 a beautiful circular rule, still manufactured. 11:32:58 From Nathan Vinarcik : I didn't know that slide rules were still being made. That's cool. I'll be sure to look into it. 11:34:11 From DL Hilton : "Old" "new" stock at F-C. Concise in Japan does make trade-show hand-out gift/advertising rules. 11:34:38 From Louis Gotlib : They are Fearns/Mears also is but they have a listing that says they are getting out of the business of making and selling them. They have quite a large number of models available. I asked them about selling me some at a discount (if I bought many) and suggested they might make a donation to the ISRM or the MIT Museum. No answer though. The prices aren't bad but you can likely find them on ebay for less if you are willing to look. 11:35:29 From Michael J. Vinarcik : I was really stoked to visit the Brunel Museum outside London last year. 11:37:06 From Gabriel Vanderdonck : Simon, mute please ! 11:39:59 From Michael J. Vinarcik : I really enjoyed reading Bouncing Bomb Man http://www.sirbarneswallis.com/BookInfo.htm 11:41:01 From Karl Kleine : packard is sitting with slide ule, hewlett standing behind him 11:41:14 From Will Marchant : Concise used to have an English site. All I can find now is https://www.concise.co.jp/fs/concise/c/gr231 but you might be able to make it work. I ordered a handful of rules from them directly and it went pretty well. And https://www.sphere.bc.ca/test/circular.html often has new stock if you donā€™t want to try to order from Japan. 11:42:07 From Michael J. Vinarcik : https://www.sliderule.tokyo/products/detail.php?product_id=8 11:44:09 From markdavis : One of my favoritesā€¦ Janis Joplin in her high school daysā€¦ in the slide rule club!: https://mikeyancey.com/uil-slide-rule-resources/ 11:44:44 From Nathan Vinarcik : I think University of Detroit Mercy still does slide rule competitions. 11:45:26 From Michael J. Vinarcik : I think it's just the Slide Rule Dance... 11:45:36 From Jerry McCarthy : Arithmeum, no?! 11:46:09 From Peter Holland : Yes, Arithmeum in Bonn, Germany 11:46:10 From David Rance (NL) : Yes, Ijzebrand's collection is in the Arithmeum 11:46:34 From Michael J. Vinarcik : I stand corrected...Nathan's right about the competition. 11:48:34 From Michael J. Vinarcik : My brother lives in West Lafayette...I'll ask him to stop by. 11:51:28 From Michael J. Vinarcik : That's worse than pointing with it!!! 11:51:34 From DL Hilton : Normal Rockwell 11:51:43 From Rob James : Buzz in Gemini I believe 11:51:43 From Bill Reich : You could add the mascot for the University of Missouri - Rolla. The mascot, Joe Miner, is carrying a slide rule. Studied nuclear engineering at UMR. 11:52:14 From Fred Astren : MR Spock, not Dr Spock. 11:52:38 From Jerry McCarthy : "Like" 11:54:06 From Nathan Vinarcik : Thank you sir 11:54:20 From Curtis Jones : That was fun! 11:55:46 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Nice talke Peter 11:56:18 From Michael J. Vinarcik : Bob: I'm envious of the items I see over your shoulder. 11:57:36 From Nathan Vinarcik : Rod: Turing as in determining the intelligence of a system? 11:59:31 From Jerry McCarthy : I think the closest thing to a slide rule at BP would be the texts being slid next to each other for Enigma cracking purposes. Not logarithmic though. 12:04:53 From markdavis : Lots of mechanical/electronic engineering at BPā€¦ Iā€™m sure slide rule were quite common. I was there in early 2019. Thereā€™s a nice slide-rule display in the museum. 12:05:36 From John Runnels : Is Ijzebrand's collection on public display at the Arithmeum? (in normal times anyway, aside from the pandemic.) 12:06:56 From Peter Holland : The Arithmeum is open to the public, even in these days, but right now his collection isn't on display 12:09:18 From Murray Felstead (Ballarat, Australia [ VK3AAI ]) : Re bicycles, I remember hearing during WW2 in France, that the FRench underground used bicycles to measure distances for maps to go to the Allies. 12:09:36 From Nathan Zeldes : The BP display was given them by the UKSRC (I think) a few years ago... 12:12:56 From Jerry McCarthy : Correct, but it's not at BP but at TNMOC.... 12:13:27 From Jerry McCarthy : And it's on loan, not given. 12:16:31 From Curtis Jones : Was the paper mounted in rolls? 12:18:33 From markdavis : I should have said The National Museum of Computing.. at Bletchley Parkā€¦ apologies 12:41:35 From Curtis Jones : Don't COVID-19 cases follow a logistic curve in early stages? 12:42:33 From Detlef Zerfowski : Here the link to the Heart Attack Risk Calculator 12:42:36 From Detlef Zerfowski : https://iwaslidecharts.com/references/heart-attack-risk-calculator-14548 12:44:18 From Curtis Jones : Example of virus increase: 12:44:20 From Curtis Jones : https://populscience.blogspot.com/2020/04/pandemic-in-spain.html 12:50:41 From Curtis Jones : I wish Rodger Shepherd (sp?) were here to comment! 12:51:27 From Michael J. Vinarcik : Hahaha 12:51:50 From DL Hilton : RTFM 12:51:53 From Ricardo Garcia : CAREFULL!!! 12:52:10 From francesco basta : :-) 12:54:50 From Wayne R Pinnow to Jim Bready(Privately) : if you havenot, have youthought about doing a poll(s) ? 12:55:21 From Robert De Cesaris to Jim Bready(Privately) : So Jim is my audio markedly better with the headset from your perspective? Interesting this did not show up as strongly in the premeetings with fewer people 12:59:33 From Robert De Cesaris to Jim Bready(Privately) : BTW looks like we actually maxed out at about 83 in attendance, now down a bit to 74 I'll bet max attendance will during the auction session. 13:01:01 From Detlef Zerfowski : On the time line Schickard's calculating machine from 1623 is missing 13:14:57 From Michael J. Vinarcik : That must have been a huge step forward! 13:16:44 From Nathan Vinarcik : Those are some impressive machines. 13:18:53 From Detlef Zerfowski : On the harmonic analyzer you can look for the paper from the IM2019 13:18:59 From Detlef Zerfowski : https://www.zerfowski.com/Papers/Zer2019-1_Calculating_Waves.pdf 13:19:08 From Michael J. Vinarcik : Thanks, Detlef! 13:20:12 From Michael J. Vinarcik : Got to see the Babbage Replica in London last year. That was cool, too. 13:21:10 From Jerry McCarthy : It doesn't run, unfortunately. 13:21:22 From Nathan Vinarcik : It needs to. 13:23:36 From Curtis Jones : It's now hard to find log and semilog paper! 13:24:05 From Michael J. Vinarcik : I started my career doing XRD! 13:24:28 From Tom Frank (KA2CDK) : Can you find a pdf to print your own? 13:24:36 From Jerry McCarthy : https://incompetech.com/graphpaper/logarithmic/ 13:24:42 From DL Hilton : yes 13:24:54 From Wayne R Pinnow : there is and"old" windows program to generate your own graph paper .... it is called graphpaper and is available at no cost 13:25:02 From Curtis Jones : True - it's easy to find log "paper" to print on the Web. 13:25:27 From Michael J. Vinarcik : Sad they have issues with arithmetic. 13:25:37 From Tom Frank (KA2CDK) : Simple nomograph is miles and gallons to compute fuel economy 13:26:16 From DL Hilton : www.printablepaper.net 13:27:05 From Wayne R Pinnow : actua;ly the program is called Graph Paper Printer 13:27:53 From Nathan Vinarcik : Thank you. I would definitely take tat course. 13:29:02 From Curtis Jones : Can you tell if reading slide-rule scales and plotting points by hand helps with understanding of accuracy and precision? 13:29:41 From Curtis Jones : I'm sure it does, but I've never been able to quantify the benefit. 13:31:20 From Brian Borchers : There's also a lot that could be said about other instruments and the history of precision machining (calipers, micrometers, Vernier scales, etc.) 13:33:40 From Michael J. Vinarcik : https://www.amazon.com/Perfectionists-Precision-Engineers-Created-Modern/dp/0062652559#:~:text=The revered New York Times,a warning for our future. 13:34:52 From Michael J. Vinarcik : https://www.harpercollins.com/products/the-perfectionists-simon-winchester?variant=32128770932770 13:35:02 From Curtis Jones : If we were at MIT museum we'd be looking at Polaroid pictures. "Perfectionists" has a chapter on learning the make Polaroid film again. 13:36:10 From Mike Frey : Take a look at ā€œHow round is your circle, Where Engineering and Mathematicsā€, by John Bryant & Chris Sangwin 13:36:15 From Richard Juday : https://www.amazon.com/How-Round-Your-Circle-Engineering/dp/0691149925 13:39:12 From Peter to Jim Bready(Privately) : That damn music is still there despite you muting all! 13:43:38 From Nathan Vinarcik : Thank you so much Mr. Frost. 13:44:41 From Amy Ackerberg-Hastings : Thank you to todayā€™s speakers and the organizers! 13:44:49 From Michael J. Vinarcik : Ditto! 13:45:07 From John Runnels : Well done all around!! 13:45:22 From Nathan Vinarcik : Thank you to everyone who presented and to the organizers. 13:45:28 From jeff white : Thanks all for a GREAT show! 13:46:09 From Michael J. Vinarcik : See you tomorrow! 13:46:15 From ted : Very well done Jim, Bob and all the presenters. 13:47:34 From Nathan Vinarcik : Goodbye everyone. See you tomorrow. 13:47:41 From Will Marchant : Thanks, Folks! 13:58:23 From Harold Frost : here is the link: https://drive.google.com/file/d/1jYYNWsm1qIHO_tA66lUlGaHymvz_VK8R/view?usp=sharing 13:58:50 From Harold Frost : https://drive.google.com/file/d/1jYYNWsm1qIHO_tA66lUlGaHymvz_VK8R/view?usp=sharing 14:04:33 From DL Hilton : nsg.upor.net/slide/ 14:05:20 From DL Hilton : nsg21@hotmail.com