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This page: http://LCTG.toku.us last changed 2021.02.25 13:09
Speaker schedule page . Potential Topics (for later scheduling)

Lexington Computer and Technology Group

The Lexington Computer and Technology Group (LCTG) is a volunteer, no-cost, not-for-profit, just-for-fun-and-education organization that meets most Wednesdays from 10am to 11:30am to discuss a wide variety of technical issues. (Sometimes we meet at a different time, see this in the schedule below.) Meetings are open to anyone interested in the topic(s). The group has an email list (see how to join below) for announcements and discussions.

The LCTG grew out of “The Computer Group” which existed prior to the opening of the Lexington Community Center, which is where we meet now.

Members of the group come from all walks of life, education, and previous experiences. Talks are presented by members of the group as well as outside experts on a variety topics of interest to the group. There is a schedule for future talks as well as a record of previous talks, below.

Many of the meetings feature an outside expert; others are led by group members. Time is set aside, approximately once a month, for short talks and for members to bring questions or problems to the membership. If you could present a topic of interest to the group, please contact us at info@LCTG.toku.us.

Members can be active, attending most of the meetings, or contributing to the discussion list, or can merely take advantage of the material being posted regarding our talks. There is no requirement for living in Lexington, and although the group started in the Lexington Senior Center there is no requirement to be a senior. The technical level of the talks varies considerably, making much of the material of interest to those with more modest technical abilities.

For further information contact group lead John Rudy at info@LCTG.toku.us (goes to John and others), john.rudy@alum.mit.edu (John only), or call John at 781-861-0402. We look forward to have you join us!

Join the Email List

To receive notices of upcoming meetings and join discussions, send an email to LCTG-subscribe@toku.us and include in the body of your email:

  • Your full name
  • Town of Residence
  • Brief self-introduction and your interest in the group
  • Optionally, topic(s) of interest you might present or share at a group meeting

To send a message to the list, address your email to: LCTG@lists.toku.us

To see information about and using the new list, click here

Group information

Given the current Covid-19 situation, presentations are being held online, weekly, on Wednesdays at 10am. See info on upcoming meetings below.

While we anticipate returning to the Lexington Community Center for our meetings sometime in the future, for obvious reasons we cannot predict when this will happen. The online format is working however. If you would like to join the meeting, you will need to join the group (see above) to get emails with the meeting connection information. For security reasons we cannot post this here on this site so either contact a member or join the group – it's free and painless.

See files from presentations year 2018 and earlier. More recent presentation files are included on this page, below.
See Yahoo group messages in raw form from 2010 to October 2019 If you want to help put these in a more readable and useful form, please let SteveI know! Thanks.

"Where to find it" Links to useful websites contributed by group members.

LCTG-Potential Topics and Speakers being considered.

We have stopped using Yahoo Groups, but the message archive prior to October 28, 2019 is currently available at the Yahoo group home page. It's possible this is no longer available; we may put this information up on a new place if there is a demand for this. (Please let SteveI or JohnR know.)

Click here to add your suggestions for talks/speakers/topics
Learn about being a volunteer Moderator – a work in progress. If you'd like to be a Moderator, it's not a difficult job and you'll help the group by volunteering, please let Steve Isenberg or John Rudy know.

2019.07.25 00:09 · smismi7

Jump to view previous year presentations


Upcoming Meetings

Upcoming Meetings

Presenting to the group with Zoomnot ready for prime time: [using ppt impress etc to present|Tips for using MS Powerpoint and LibreOffice Impress in your presentation]
This schedule last modified 2021.02.26 11:00

Upcoming 2021 Schedule

click to show upcoming meetings

Click to hide upcoming meetings

DateTopicconfirmedFollowups
Mar 3, 2021Potpourri
(Harry) Getting Streaming Programming Into Your TV (what to do when your TV just isn't smart enough)
Fix-It Shops, Dan Kleppner et al
Cryptocurrency and the IRS: What No One Knew About Taxes 24min
GeorgeB continuing on Rubber: industrial products, recycling, synthetic, and more.

Another Mark Rober video, perhaps? Or a surprise video? Come see.

Freakonomics?
? 3-year effort to video two vortex rings colliding in super slow motion. https://www.youtube.com/watch?v=EVbdbVhzcM4 8min (Bill Haley)
? Other Mark Rober youtube videos (he did Squirrel vid) https://www.youtube.com/channel/UCY1kMZp36IQSyNx_9h4mpCg
(Or, finish earlier topics not completed)and more?
yes
Mar 10, 2021Chris Barnett, theory of recycling (GeorgeB to followup)
Chris Barnett, VP waste mgmt
NOT YETGeorgeB to confirm date with Barnett
Mar 17, 2021Why is Venus so bloody hot? The greenhouse effect. (Charlie Holbrow)yes
Mar 24, 2021I. I. Robi, a story of scientific rags-to-riches (Dan Kleppner)yesDan K to supply summary
Mar 31, 2021Flying Cars presented by Bill Passman. An overview of what is currently called “Flying Cars”, which includes Terrafugia's “roadable aircraft”, designed to drive from home to an airport and then fly like a General Aviation Light-Sport Aircraft (LSA). Other flying car efforts are aimed at VTOL air taxi fleets, personal VTOL vehicles, electric airplanes and autonomous cargo-VTOLs.
Technologies being used are folding wings, tilt-wings, tilt-rotors, tail-sitters, and power sources using battery electric drive, hybrid-electric drive, hydrogen, and fuel-cell power.
Bill will also present market hurdles, such as: battery technology, charging infrastructure, safety, heliport infrastructure, noise reduction, and FAA regulatory capabilities.
yes
Apr 7, 2021Telephone Switching Before Computers (Ken Pogran)yes
Apr 14, 2021The Apollo Mission Presented by Fred Martin, ScD.; Dr. Martin served as the Apollo Software Project Manager while at the MIT Instrumentation Laboratory (now Draper Lab) and then pursued an industrial career in software analysis and management.
History will surely record the voyage to the moon as being the greatest adventure of the 20th century. We will first examine our fascination with our closest neighbor and early speculation of travel through the writings of Jules Verne. We will discuss the principles of how a rocket works, gain an understanding of JFK’s decision and confidence to place a man on the Moon, and experience the Apollo Moon Project “first hand:” its methods, triumphs and surprises. Our resources will include Dr. Martin’s experiences within the Apollo Program and videos of the exciting minute-by-minute landing on the Moon’s surface.
yes
Apr 21, 2021Andrea Ghez; won Nobel Physics for black holes, Brian Green video has interview with her. JohnR has videos with Ghez (and will investigate applicability for LCTG)
https://www.youtube.com/watch?v=YcPPGVigvZk This is an excellent description by Andrea Ghez (2020 Nobel Prize winner in Physics). It is 50 minutes long and is an excellent example of women in science. I think it is better than her interview with Brian Greene. It was given at the World Science Festival which is run by Greene
Apr 28, 2021Potpourri
May 5, 2021Space Debris: A Big Problem (Georg Kirchner) When the first satellites were launched some 60 years ago, space was more or less empty. However, the ever increasing launching activities since that now have created a rather crowded environment above our heads: More than 30.000 space debris objects – old / defunct satellites, upper stages of rockets, remaining parts after explosions of collisions etc. – are now orbiting in different altitudes, tracked by radar, laser and passive optical telescopes. The possibility of collisions is already rather high: Collision warning systems create already more than 1000 warnings per day (!) of close encounters between 2 objects – and sometimes this is TOO close – and a collision between two space debris objects, at velocities of 27.000 km/h, creates several 1000 new space debris parts…
Satellite Laser Ranging (SLR) has demonstrated during the last years the capability of tracking such debris objects, helping to determine their accurate orbit, and also their tumbling motions – important features if you want to catch an old upper stage, and remove it from space.

Dr. Georg Kirchner is a group leader at the Space Research Institute, Department of Satellite Geodesy, Austrian Academy of Sciences in Graz, Austria.
yes
May 12, 2021Ivor Morgan is willing to talk about his career in Antarctica, he has photos. It started with him being assigned to a radar station in UK after WWII, then to Antarctica for 2 years. [George Gamota]
May 19, 2021Potpourri
May 26, 2021Lex Liby presentation on security by Bruce Schneier https://youtu.be/eVCYX3N-nFQ
June 2, 2021Eli Brookner would like to present to the group “Fun Family Talk on Contributions of Radar to Winning WWII”. Abstract from Eli:
Radar was in its infancy at the start of World War II. The British were using radar effectively along their coastline with a network of antennas on very tall towers to warn of approaching German aircraft, but they needed an invention that would allow radars to be small enough to fit on ships and aircraft. They came up with the cavity magnetron. However they looked to American manufacturing know-how and resources to mass produce this device in a hurry. After turndowns by all the major US firms, a small Boston newcomer, Raytheon Company, came up with a solution and ended up making 85% of all magnetrons used by the allies in the war, and changed the course of the war.
June 9, 2021
June 16, 2021
June 23, 2021
June 30, 2021
  • Orphaned (moved from 12/9/2020)
    Computational Photography - changing what's used as a camera. link e.g., replacing DSLR with cellphones; more (Jonathan Goode?, Harry Forsdick?) (needs a lead)
  • Orphaned (moved from 11/11/2020)
    How one builds a web application (e.g., using spreadsheets) (Harry Forsdick)
  • Orphaned Best of Freakonomics an interview with Steven Levitt and Stephen Dubner, moderated by Faith Salie. Recorded at the 92nd Street Y on May 2015. (Peter Albin has link to 70min video)
2020.01.22 16:08 · smismi7

Past Meetings

2021

click to show 2021 past meetings

Click to hide past 2021 meetings

DateTopic and linksAttaches#
Jan 6, 2021Dr. Peter Braun: A Covid-19 Primer A scientific look at the virus. Why is COVID-19 so “successful” from a pathogenic point of view. Where do viruses like this come from? How has treatment progressed? Vaccine development and technology. (The recording contains a follow-up on the Brevig Mission that was not covered in the live presentation; at approx. 1:37).watch the presentation53
Jan 13, 2021Priestly and the Discovery of Oxygen (presented by Jerry Slate, M.D.) Joseph Priestly (1733 - 1804) is credited with the discovery of oxygen. His discovery was a part of a long term scientific effort to understand the nature of matter. His work as an untrained scientist showed analytical skill which illustrated the relevance of his finding. His discovery of oxygen represents the beginning of the understanding of the composition of the atmosphere and its role in respiration. watch the presentation42
Jan 20, 2021Quantum Biology (GeorgeG) (video and intro) with discussion
When Quantum Mechanics were first introduced widely, pioneers such as Heisenberg thought that quantum effects should play a role in biology, but for the next 50 years it was sort of forgotten. With today's computing power and instrumentation new insights are being given to explain biological phenomena by invoking quantum effects such as tunneling or entanglement. We will hear 3 experts (MIT, UC Irvine, & U Arizona) discussing the implications of quantum effects in biological entities
Video we watched:Quantum Biology: The Hidden Nature of Nature (1h35m) Other related and referenced videos:
Part 1: How Plants use Quantum Mechanics (12m) . Part 2: Enzymes, the Engines of Life (12m) . Part 3: How Birds (Might) Navigate with Quantum Mechanics (21m)
George's introduction
slides
42
Jan 27, 2021Potpourri Peter Albin, your host
Y2K (John Rudy, 20min)
Drones in the UK, how they threaten aircraft safety, measures taken to address them. (The video is not widely available)
44
Feb 3, 2021Plastics having a recycle number on them leads people to think they will be recycled and are perhaps more accepting of then using them. However, many thin plastic containers such as salad boxes or clear takeout containers are not in practice recycled. (George Burnell) This might be more than one session. Plastic bags biodegradability, manufacture, disposal, recycling.
also possibly of interest: https://www.pbs.org/newshour/show/the-plastic-problem (1hr video)
Recycling by the numbers
[presentation coming soon] slides35
Feb 10, 2021Polaroid: Recently I learned about a Google talk on the history of Polaroid (Instant:The Story of Polaroid Christopher Bonanos Talks at Google, 2012). It might make an interesting meeting. The talk is about an hour and we could augment it with “actual folks” who worked for Polaroid? With 3-4 people worked there (Peter Albin)
I worked in photographic film product development at Polaroid for 23 years (1976 to 1998). It was there that out of necessity I became in involved in N-dimensional non-linear systems optimization computer tools. I could discuss the approaches that we used and the evolution of the software tools that were internally developed. Many of these tools and graphical visualization aids are now available in the commercial pack Design Expert by StatEase which I used in a final consulting gig at Polaroid in 2003. [Bob Eckert]
[presentation coming soon]36
Feb 17, 2021History relating to Rubber, what used for, how manufactured, WWI, WWII, rubber shortages (George Burnell with Peter, John Rudy)
WWI WWII Japan taking over, fire hoses & rain gear
[presentation coming soon]33
Feb 24, 2021(GeorgeG) Mars landing, Perseverance landed 2/18/2021, George discusses this with several visuals Watch the presentation
Mars photos to music
55


2020

click to show 2020 past meetings

Click to hide past 2020 meetings

DateTopic and links
Jan 8, 2020 Ig Nobel 2019 Awards awards for dubious inventions (Peter Albin) link to Improbable Research page watch the presentation
Jan 15, 2020[1] How we accomplished the change from Yahoo Groups and using the new system (30min, Steve Isenberg) Slides
[2] Windows Security Settings and Windows 7 Anti-Malware (30min, Gary Patrick) Slides
[3] Alternatives to TV servers: new ways of getting programming (30min, Steve Isenberg) Slides . 2010 NY Times article . Spreadsheet shows service vs content
[1] Watch the presentation
[2] Watch the presentation
[3] Watch the presentation
Jan 22, 2020Tesla-Marconi conflict their radio-related patent war from 1900-1943 (Bob Primak) Presentation notesWatch the presentation
Jan 29, 2020Potpourri Ken Cutter spoke on UFO's slideset and the history behind speed of light measurements slideset.
John Rudy showed a video from Broad Institute (pronounced, bro-awd): Overall view of Broad Institute and the presentation we watched, human genome revolution past, present, and future.
John Rudy mentioned that there are some MOOC classes on introduction to biology, see info at this edx link (MOOC=Massive Open Online Course)
Feb 5, 2020Career Day Attendees discuss interesting things from their career. Watch the discussion
Feb 12, 2020Space Update (George Gamota)
Feb 19, 2020Who’s Afraid of the Big Bad AI This is a later presentation, and therefore improved over an earlier presentation.
(John Rudy will coordinate.)
watch the video
Feb 26, 2020Patents – What they are, a brief history of patents, how to read them, and how to obtain them watch the presentation
Mar 4, 2020Patent Licensing from Universities (Lita Nelson) watch the presentation
Mar 11, 2020Geodesy, its properties and tools, presented by Mike Pearlman of the Harvard-Smithsonian Center for Astrophysics Program on Geodesy
Geodesy is the science of accurately measuring and understanding three fundamental properties of the Earth: its geometric shape, its orientation in space, and its gravity field— as well as the changes of these properties with time.
Space Geodesy uses sources external to the Earth: artificial satellites (in satellite geodesy), quasars (in very-long-baseline interferometry, VLBI), and the retroreflectors on the Moon (in lunar laser ranging) to measure these static and time varying properties.
Of current interest are measurements to monitor geodetic parameters and their temporal variations in a global reference frame with a target relative accuracy of 10E-9 – 10E-10, for both scientific understanding of the Earth system and understanding their potential impact on society
Fundamental to these measurements is a reference frame that provides stability over space, time, and evolving technology.
watch the presentation
Mar 18, 2020Tracking New Diseases: Medical issues incl Vaping (Jerry Slate) watch the presentation45
Mar 25, 2020Patents for high technology (and when not to have them) (Dick Wagner) watch the presentation44
Apr 1, 20203D Printing and Robotics in Industry: An Update (George Burnell) 3D Printers fighting Coronavirus (link from PeterA)watch the presentation
chat messages
45
Apr 8, 2020Christine Muir, Community Librarian at Cary Library, will demonstrate how to access all the online resources offered by the library. There is no fee for any of these resources, which include ebooks, digital audiobooks, movies, music, TV shows, newspapers, and more. watch the presentation41
Apr 15, 2020Futurism We started with something different (Cute Brother and Sister); and then
a couple of videos by/with Amy Webb (a quantitative futurist, professor of strategic foresight at the NYU Stern School of Business and founder of the Future Today Institute)
Ted Talk on hacking online dating (17 mins)
presenting the 2019 Emerging Tech Trends Report (60 minutes) at SXSW in March 2019
relevant links for your offline reference include https://amywebb.io/
There were several links shown during the videos: http://bit.ly/FTI2019TechTrends (this links to the 2020 report), http://bit.ly/SXSW2019TechTrends, and the “TWiT” program we watched at the end http://twit.tv/subscribe (and there's lots to subscribe to!!) and http://twit.tv/live
41
Apr 22, 2020Potpourri Gary Patrick with information on Encryption and some Utilities.
Charly Sestokas with computer buying tips, etc; HD vs SSD; SD Longevity; MS Surface;
plus Potential House Fires from Phone, Tablet, Laptop, other Electronic Charging setups
watch the presentation
the presentation with captions
slides
chat messages
42
Apr 29, 2020The Science behind Columbus (Bob Melanson)
Bob finishes this up on July 15
watch the presentation
slides
36
May 6, 2020The Manhattan Project first part (Charles Holbrow)watch the presentation58
May 13, 2020Nuclear Power Generation (David Kahan)slides
watch the presentation
47
May 20, 2020Boost-Phase Defense against ICBMs presented by Dan Kleppner.
Because little was known publicly about the Bush proposal, the American Physical Society initiated a study. Our presenter was co-chair of the study group. Although the study is fifteen years old, little has changed.
slides
watch the presentation
46
May 27, 2020George Burnell Part II
Continuation/conclusion of George Burnell's earlier presentation on 3D printing
watch the presentation26
June 3, 2020The Manhattan Project - part 2 (Charles Holbrow)slideswatch the presentation46
June 10, 2020Potpourii NY Times article dealing with privacy (Peter Albin)
Phone tracking of people (Charlie Holbrow)
The Immortal (BBC program)
(not recorded)42
June 17, 2020Sabermetrics The Statistical Analysis of Baseball (Andy Andres)
Andy Andres is a senior lecturer of natural science at the Boston University College of General Studies who is an expert in exercise physiology, nutritional biochemistry and baseball. In addition to the work listed above, Andres writes, lectures, and speaks to the media about the effects of steroids on baseball players, and he teaches a course at Tufts University in sabermetrics, the data-driven analysis of baseball performance. These pursuits allow the lifelong Red Sox fan and athlete to synthesize his twin loves: baseball and scientific inquiry. Andres is also an MLB datacaster at Fenway Park, a Data Analyst for BaseballHQ.com and Head Coach/Lead instructor for the MIT Science of Baseball Program. In the spring of 2014, Andres will teach a MOOC (Massive Open Online Course) titled “Sabermetrics 101: Introduction to Baseball Analytics” on the edX platform.
SABR: Society of American Baseball Research
watch the presentation33
June 24, 2020MOOC Massive Open Online Courses – What's there, what's new. (John Rudy, Charlie Holbrow)
Broken into three presentations: John's talk on available MOOCs, Charlie's talk on MOOCs, and Q&A discussion.
Slidesets to the right.
slides/rudy
slides/holbrow
watch the presentation
40
July 1, 2020Variety Special with Bob Primak and John Rudy on SUMo updater, other topics presented by Steve Isenberg including: Getting loads of music files legally for free after inexpensive application purchase; Video on Deepfakes (how it's done), and a video on Virus Mobility (a haha). Here are links to what we presented and displayed:
Updater apps: SUMo Application Updater (Win) [SUMo Details] Ninite Windows Application Updater
Download/convert apps: Any Video Converter - Downloads YouTube vids and converts formats (Win, Mac) 4K Video Downloader
Listen/Watch/Record apps: RadioTracker - download music from Internet (Win) Audials, extension of RadioTracker, music and video download and more (Win)
Videos played: How Deepfakes Work A Virus Walks into a Bar
SUMo slides
watch the presentation
38
July 8, 20205G and Internet of Things in the Age of Coronavirus (Bob Primak)
Slides References 5G Networks 5G Spectrum Bands
watch the presentation41
July 15, 2020Potpourri
last part of Bob Melanson's Columbus presentation started on 4/29
The Physics of Sailing
Q&A from Bob Primak's 5G talk last week, 7/8
Onboard automotive diagnostics (Bill Quinn) slides
watch the presentation42
July 22, 2020Video on Secrets of the lost Antikythera; A 2000 year old computer. (Jonathan Goode) link.
Brief intro to using Davinci Resolve to produce a slideshow video (Steve Isenberg)
42
July 29, 2020Frontline AI part 1 (AI for the Masses) Frontline: In the Age of AI
Related articles (thanks Peter) T-Shirt makes you invisible NIST looks into face mask effects on face recognition
34
August 5, 2020Back to the Basics – Office Tools
Interesting Excel Spreadsheet uses (Jonathan)
neat applications of functions (SteveI) Sample spreadsheet (Excel version) and LibreOffice (.ods) version
watch the Presentation44
August 12, 2020More on AI. The Rise of Artificial Intelligence 27
August 19, 2020 How to Build a Time Machine
What Happens When You Respond to Spam (Peter Albin presented)
26
August 26, 2020Myths and Facts on Climate Change - a non-alarmist perspective Presented by Shelly Lowenthal who says: “I developed a class on climate change that I give to life long learning organizations. It’s part of my History Course that I present. … There is science involved.”
Shelly recommends that you watch Michael Moore's movie on YouTube, “Planet of the Humans” https://www.youtube.com/watch?v=Zk11vI-7czE (1hr 40min) before the meeting. It is a documentary on wind and solar green energy.
Here's a 37 second teaser for the movie:https://www.youtube.com/watch?v=4pXCftKF4uI
watch the presentation42
Sept 2, 2020Count Rumford and his 18th Century Technology Innovationns Dan Kleppner: Quite a few years ago I became interested in Benjamin Thompson (1752-1814) , aka Count Rumford. He was a great applied scientist and we owe much of our modern domestic technology to him: the kitchen range, double boiler, layered clothing and thermal underwear, steam heating,…. He was the first person to clearly understand all the modes of heat transfer. He was a public benefactor, initiated poor houses in many European cities, and he founded the Royal Institution in London which supported the research of Michael Faraday His career was a series of rags to riches. He would be better remembered if it were not for a character flaw: he antagonized everyone he dealt with to such a degree that he had to flee the country time and again.watch the presentation41
Sept 9, 2020 Blind Bombing by Norman Fine
“I found this book spellbinding and with insight into the development of a new and advanced secret radar system that permitted the allies to penetrate through inclement weather and enable the allies to reverse the dominance of the Nazis at the onset of WWII. Blind Bombing has a warm sensitive side, in that Norman Fine’s uncle (Stanley) brought the first production model of the new airborne radar system to Europe permitting allied bombers to destroy factories supplying the German forces that were usually obscured by overcast weather”.
watch the presentation slides30
Sept 16, 2020Potpourri
What to do with your family during a pandemic? (George Gamota)
Update of Elon Musk's Starlink Satellite Internet Project (Bob Primak)
There were videos we could not include in this presentation. Here are links to them:
Video of the launch, fairing recovery, and booster return, and landing on a ship: https://www.space.com/spacex-starlink-11-satellites-launch-september-2020.html
Launch and first stage separation and landing: https://www.youtube.com/watch?v=7Ei_Z_Xv3BM
Deployment of satellites: https://videos.space.com/m/N9qB26JP/watch-spacex-deploy-60-starlink-satellites-in-amazing-view-from-space?list=9wzCTV4g
Fairing recovery (previous launch in July): https://www.space.com/spacex-falcon-9-rocket-payload-fairing-catch-success.html
Another “filler” video we showed: harvesting spaghetti
Presentation videos:
Pandemic What To Do
StarLink Update
34
Sept 23, 2020The future of music – production and delivery by Charles J Holbrow (CJH). What can we learn about the future or music and music technology by looking at the past? I will present examples that illustrate the evolution of musical ideas and technologies from their conception to how they have influenced and continue to influence popular music today. I will describe how popular music is created today and review some research-stage music production technologies that aim to influence the current music production paradigms. As part of my PhD studies at the MIT Media Lab, I am developing software to enable a new kind of online musical collaboration and distribution. I will conclude by showing you an early example of this software
Who is CJH? His early education was in Germany. His high school was the Sudbury Valley School, an alternative school in Sudbury, MA. After a year at Middlesex Community College, he transferred to UMass Lowell where he majored in sound recording technology and performance (piano). Following jobs developing software for games, he took up an internship at MIT's Opera of the Future program with noted composer Prof. Tod Machover. Subsequently, CJH was admitted into MIT's Media Arts and Sciences program from which he expects soon to receive a Ph.D. He is Charlie Holbrow's grandson.
The Media Timeline: Use mouse to zoom in/out; on Apple trackpad, two-finger up/down gesture to zoom; click and drag to pan the view.
watch the presentation slides40
Sept 30, 2020Covid-19 Update (Jerry Slate)watch the presentation50
Oct 7, 2020Producing a TV Show using DaVinci Resolve (Steve Isenberg)watch the presentation33
Oct 14, 2020The CAC Ken Pogran tells about the Lexington Communications Advisory Committee. How did it start, what are its responsibilities, what are today's issues.watch the presentation27
Oct 21, 2020Harry Forsdick: ARPAnet & Internet Conferencingwatch the presentation39
Oct 28, 2020Potpourri Slide Rules (remember them?) (Ken Schwarz)
The Saga of John Rudy's New TV
A bit on Zoom Webinars (John Rudy)\\Recycling electronics (John Rudy)
Nuclear R&D Progress Update (David Kahan)
(unable to create video)41
Nov 4, 2020Atomic Clocks and, a brief history of Time (Dan Kleppner)watch the presentation37
Nov 11, 2020Atomic Clocks (part 2) by Dan Kleppner
followed by (and not in recorded presentation) mRNA: Transforming Medicine
watch the presentation27
Nov 18, 2020Speech Input and Translation. George Gamota on Google Translate. Peter Albin on history of translation and voice recognition. Jerry Slate discusses and demonstrates Naturally Speaking. Video on Amazon Transcribe Amazon Transcribe is Now Generally Availablewatch the presentation44
Nov 25, 2020Vacation/no meeting
Dec 2, 2020Potpourri
One man's attempt to build a squirrel-impervious bird feeder (from John Rudy/20 min)
Sand on the Table - Harmonics
Ted Talk: Is Translation Easy? (17 min)
How Trees Talk to Each Other (Suzanne Simard) (found by CharlieH) (18 min)
(not recorded)26
Dec 9, 2020Sara Seager/Distinguished MIT Professor in Physics, Astronomy, Earth Science on Venus (the planet) 1hr
Scientific approach to, yes, defogging your car's windows (by the Squirrel guy)
(not recorded)34
Dec 16, 2020Acoustic Detection & Localization of an Active Shooter or Sniper presented by Tony Galaitsis
Deranged shooters and terrorist or enemy snipers have been a concern for a long time. Technological advances over the past few decades have used gunfire acoustic information to detect and localize active shooters and snipers in order to prevent or minimize their deadly impact. This presentation reviews the general state of acoustic shooter/sniper detection and localization, based on publicly available information found on the internet (YouTube videos, Wikipedia, manufacturer brochures, and published papers/patents) and some basic geometry.
watch the presentation29
Dec 23, 2020Vacation - Enjoy the holidays!
Dec 30, 2020Career stories (update). People with careers during which interesting (and now unclassified) things have happened. Mistakes made, lessons learned.
Learn from: Carl Laxarus, Bill Haley, Mike Alexander, Dick Wagner, George Burnell, David Kahan, and Dan Kleppner
watch the presentation37


2019

click to show 2019 past meetings

Click to hide past 2019 meetings

DateLink to Video(s)Slides/notes
Dec 25, 2019Christmas - no meeting
Your homework is to celebrate the good things in life.
Dec 18, 2019Potpourri John Rudy continues AI in Medicine; Steve Isenberg on Cloud File Storage Options
Dec 11, 2019 AI in Medicine MIT Alum Newsletter AI in Medical Care
Dec 4, 2019 Tech trends and holiday gift ideas (Peter Albin and Bob Primak) Watch the presentation Slides
Nov 27, 2019 Happy Thanksgiving! No meeting.
Nov 20, 2019 Dark Web. “The legitimate uses of TOR, which is the software on which the so-called Dark Web runs.
Or, if more interesting, a tour of the Dark Web“ https://darkwebtours.weebly.com/ Watch the presentation
Nov 13, 2019 Steering committee
Nov 6, 2019 Backup Strategies (Peter Albin) Watch the presentationSlides
Oct 30, 2019 Space colonies in Solar Orbit
The book describing our design study is available at:
http://large.stanford.edu/courses/2016/ph240/martelaro2/docs/nasa-sp-413.pdf
Watch the Presentation
Charlie's handout
Oct 23, 2019 Tesla vs Edison (Bob Primak) Watch the presentation Bob's paper
Oct 16, 2019 Potpourri:
Flying Saucers – from material written by George Adamski;
Deep Fakes video;
Windows 10 tips (askwoody.com, you may need to become a member with voluntary paid membership; Backing up your device drivers; Getting those old games back into Win10, like FreeCell, Hearts, Solitaire, Chess, Minesweeper; discussion on when to and not to update to “the latest” Win10 release (consider: consult askwoody.com which today advises NOT to patch MS patches.) Gary's slides
Oct 9, 2019 Yom Kippur, no meeting
Oct 2, 2019 Science/Technology Rivalries: Newton vs. Liebnitz vs. Hooke (Charlie Holbrow) Watch the presentation (note: video is missing for part of the presentation) handout
Sept 25, 2019 Application of physics techniques to biology. Gene Surfing and Survival of the Luckiest, David Nelson, Professor of Physics, Harvard (friend of Harry Forsdick). Population waves have played a crucial role in evolutionary history, as in the “out of Africa” hypothesis for human ancestry. Population geneticists and physicists are now developing methods for understanding how mutations, number fluctuations and selective advantages play out in such situations watch the presentation
Sept 18, 2019 Cogito. A few weeks ago Mitch Wolfe sent out two very thought provoking links regarding the new science of voice technology, including what can be gathered by voice analysis using AI. We are fortunate to have Ali Azarbayejani, Cogito's CTO, visit and speak with us about the technology used by this local company which makes software that analyzes phone conversations and provides real-time guidance to help service employees better engage and connect with customers. Watch the presentation
Sept 11, 2019 Jonathan Goode discusses many interesting (and amazing) computer details including fonts
Bob Primak on the Laser Scanning of St Pauls Cathedral and an update on the cleanup of Notre Dame Cathedral
Notes on Bob's talk
High lead levels found in Notre Dame WSJ Article, Reconstruction work is on hold due to lead
Sept 4, 2019 AI for People in a Hurry (short) and Setting Rules for the AI Race, plus a pre and post view discussion. Meeting led by Larry Wittig.
Aug 28, 2019 Dava Sobel’s Google talk on “The Glass Universe”, women in Science (a Google Talk video)
JohnR will introduce the subject and speaker, we'll watch the video, and discuss it and related topics afterwards
see also Constructing the Glass Universe by Dava Sobel. Additional info on and about this topic, by Gary Patrick–includes comments on the video and more.
Aug 21, 2019 “UNIX, Linux - Origins, History, Ongoing Futures”, a talk presented by Charly Sestokas (note, talk will not be recorded)
plus a 30-minute video about SpaceX, presented by George Gamota
Aug 14, 2019 Potpourri.
Eli Brookner finishes his talk on Radar and Einstein
CharlyS on Storage (not recorded).
How to use LexMedia to view videos on demand
Aug 7, 2019 Eli Brookner "Snoopy on Radar & Phased Arrays & Einstein's Duality Theory – An Update." part 1 (90 min)
July 31, 2019 Eight Days to the Moon and Back - focus on Apollo 11 [George Gamota]
July 24, 2019Breaking the WWII Enigma Machine (Material from the April 2019 Lexington Veteran’s meeting, search LexMedia On Demand for “Enigma”) [Rudy]
July 17, 2019Potpourri including Steve Isenberg on virtual credit cards, space elevators, and more (planningpage) recording of presentation
July 10, 2019Apple Computer, History and Devices, by Josh Turiel see the presentation
July 3, 2019No Meeting due to Holiday
June 26, 2019Update on 5G (Bob Primak) see the presentation
June 19, 2019Black Hole 60-minute video (Gamota) plus
June 12, 2019 From talks at Google Frank Abagnale: "Catch Me If You Can"
and A new way to remove CO2 from the atmosphere (Jennifer Wilcox)
June 5, 20193D Reconstruction. Used for churches and other buildings. (Bob Primak)
May 29, 2019Potpourri including Y2K. What was it, why did it happen, was it real? (John Rudy) and Gary Patrick on Windows Issues
May 22, 2019Potpourri. Showed several movies. Vaccines calling shots
The Ingenious Design of the Aluminum Beverage Can
The strange tale of the Norden bombsight
May 15, 2019Career stories. Come prepared to tell us about your technical experiences.
(We have done this 2-3 times before; but not recently).
https://www.pbs.org/video/nova-vaccinescalling-shots/
May 8, 2019Ray Kurzweil + Disruptive Technologies and Dangerous Ideas Singularity University co-founder, Google AI Director and noted futurist Ray Kurzweil joined Peter H. Diamandis for a 90-minute Ask Me Anything, all aimed at providing you an unfair advantage for your business.https://youtu.be/SaOfLtoaKqw
May 1, 2019Potpourri and Steering Committee
April 24, 2019Documentary on Neil ArmstrongGamota
April 17, 2019History of the World in 100 Objects (continued). We listened to The mechanical galleon, Mexican codex map, Ship's chronometer from HMS Beagle, and Solar powered lamp and chargerBritish Museum site
BBC site
April 10, 2019Madame Curie video about Madame Curie and the Curie family, presented by Charlie Holbrow. Madame Curie and the Curie family will focus on her and her daughter and their characters and discoveries and how they fit into the sequence of dramatic developments in physics between the discovery of radioactivity in 1897 and the discovery of nuclear fission in 1938. This will include some description of Lise Meitner's role in these developments and a brief mention of why she didn't get a Nobel for the discovery of nuclear fission.
For those interested, Amazon has the movie Radioactive about Marie Curie's work (free to Amazon Prime members)
handout that wasn't handed out How the Curies' piezo device worked and measured small electric current
April 3, 2019Showing the 2014 AI movie Ex Machina: A young programmer is selected to participate
in a ground-breaking experiment in synthetic (artificial) intelligence (AI) by evaluating
the human qualities of a highly advanced humanoid. Very intriguing movie.
FYI, the movie is available on NetFlix.
March 27, 2019Computer History Museum (Mountain View, CA) interview with Frank Heart (who in 1969 led the team of BBN engineers that created the ARPANET).
slightly shortened version
slides
March 20, 2019George Gamota shows video "Journey through the Milky Way"
And relating to the end of the program, info on Detecting Dark Matter
New: Milky Way Bulge
March 13, 2019Password Managers
Slides (with links) for the presentation
Will your password stand up to a cracker?
Is your password or account info out on the web?
Newsletter 4/15/2019 discussing password managers
Related info
About Keeper Password Manager
Keeper website screenshots
March 6, 2019History of the World in 100 items. Presenting a representative sample of the 100-part series of 15 podcasts by Neil MacGregor during his time as Director of the British Museum that explores world history from 2 million years ago to the present. We listened to The Flood Tablet, Hebrew Astrolabe, and Ming Bank Note. British Museum site
BBC site
February 27, 2019George Gamota presents "2018 Space Events/Discoveries" plus 10 minute update on "Trump's Science Appointees"Space Update slides
Trump Science Appointees slides
February 20, 2019Charlie presents the first of 3 talks on quantum physics, today's subject is "why wave-particle duality makes such a disturbing theory necessary"Powerpoint slides
Wave Particle outline -- Why we need quantum mechanics
February 13, 2019Windows System Maintenance and Updating (Bob Primak) part 1PDF of Bob's slides
February 6, 2019The Power Grid (presented by Jackie Zajac)PDF of Jackie's slides
January 30, 20192019 lg Nobel awards ceremony (presenter Peter Albin)
Awards Ceremony Improbable Research home
“Research that makes people LAUGH and then THINK”
January 23, 2019Shown:
TED Talk String theory - Brian Greene
The greatest dance sequence ever
The best stats you've ever seen
The tyranny of the rocket equation
Not shown but of possible interest
TED Talk Why is our universe fine-tuned for life? - Brian Greene
10 Fascinating Examples of Unintended Consequences
January 16, 2019Mathematics of Weight Loss
10 Times Michio Kaku Arguments Blew Our Minds
TED Talk The freakonomics of McDonalds vs Drugs by Steve Levitt
January 9, 2019Michael Rosenblatt, MD on "Ways That Wartime Injuries Have Influenced Civilian Medical Practice"link to slides on Yahoo


2018

In the Works – Potential Topics

Click to show potential topics

Click to hide potential topics

We'd like your thoughts on these and other topics you are interested in seeing or maybe presenting. Send your thoughts via email to info@LCTG.toku.us or contact John Rudy, Peter Albin, Bob Primak, or Steve Isenberg directly – Thank you.
This list last changed 2021.02.18 15:09

  • ?? Discovery platinum compound for radiation therapy
  • ?? Search for life on other planets (research in progress; Cindy Bares doing research).
  • (Charlie Holbrow to followup) Dan Kleppner: I was planning to suggest a talk that I think would mesh with the group’s interests. The subject is Fixit Clinics. These are hands-on clinics that were started at MIT perhaps fifteen years ago, and presented during IAP. They are the brainchild of Peter Mui, an MIT graduate (full disclosure: Peter is my son’s brother-in-law). The rationale is fundamentally conservation- he is appalled by the enormous waste of usable appliances. The issue of right-to-repair arises in these clinics: many appliances are intentionally unfixable. Fixit clines have gained in popularity and he has put them on them in many venues in the U.S. and also abroad.
  • (Peter to fup with Jonathan Goode) Actual accomplishments of things in the Frontiers of Science.
    a) has quantum computing ever solved a problem?, b)
    has blockchain produced a cost effective solution for anything?,
    c) has the Large Hadron Collider advanced science or provided the real confirmations the string theorists were looking for? (John Rudy knows someone named Harvey might fit)
  • (Peter to fup with Jonathan Goode) A revised explanation, in an intuitively satisfying way, why do airplanes fly? This was presented earlier using incomprehensible equations that seem unsatisfying and suspicious. Can planes really achieve level flight upside down?
  • Ocean Trash (plastics, etc) (need speaker)
  • (GeorgeB to fup) Recycling (what happens when you put trash out; computer or lightbulb return to BB or Staples) (Bodoin/Harvey & What Lex Does? How to separate recyclables?)
  • (Peter to fup) https://www.pbs.org/wgbh/nova/video/decoding-da-vinci/ A NOVA on DaVinci (Peter- I’d love to get Nancy Alimansky to participate and comment on it –John Rudy)
  • Cacelia Payne-Gaposhkin would have received a Nobel prize for figuring out what stars are made of, in a fairer world. https://youtu.be/BiNAAbRqFYQ (John Rudy) from wikipedia: a British-born American astronomer and astrophysicist who proposed in her 1925 doctoral thesis that stars were composed primarily of hydrogen and helium. Her groundbreaking conclusion was initially rejected because it contradicted the scientific wisdom of the time, which held that there were no significant elemental differences between the Sun and Earth. Independent observations eventually proved she was correct.
  • most recent Nobel Prizes in Physiology & Medicine, Physics, and Chemistry - maybe a half hour on each with discussion. I have a background in Physics, Chemistry and Molecular Biology so the topics are not foreign to me. I could also discuss the Economics Prize, since I've recently become interested in economics, but someone else in the group may be more knowledgeable about this prize which was on auction theory. Another topic I could talk about is the discovery of the platinum containing compound that has been used for decades in chemotherapy of cancer. This talk would be from the same perspective as our last speaker (Harry?) in the sense that I was there as the discovery was made. This discovery is a great example of how basic science research really happens. (Dick Wagner)
  • Women in Science, Scientists in Other Cultures (Charlie ask Dan for suggestions; GeorgeG to ask CAAL; Harry to ask Indian Association; for speaker possibilities) (Need contact with Black Americans – Harry to search)
  • Advances in Surgery (Jerry?)
  • Solar Panels, Solar Technology. Mark Sandeen (Harry to fup); Frank van Mierlo, owner of solar technology company, explains science of solar panels (GeorgeB to fup)
  • Discussion of Blockchain (enhanced from earlier presentation; including encryption; and uses) (SteveI)
  • iRobot and associated technologies (Peter to investigate)
  • idea: Telescopes (JohnR; huge telescope being decommissioned)
  • Ignoble awards 2020
  • idea: ISO-NE webinar being presented by the Attorney General's office; JohnBrown to see if it is recorded and if it's good for the group [20201125 email b/JohnR & JohnB]
  • Iron Mountain: History. (Carl Lazarus; 20mins +/-) Potential potpourri topic.
  • Why Craters are Round (Neil deGrasse Tyso explains; need to turn out the “comedian”) [~14min]
  • CERN and the Hadron Collider. [originally scheduled for 12/9/2020, canceled on 12/4] History, Why It Was Built, Hoped Outcomes, Discovery of Bison, What is Next (Harvey Newman, professor Cal Tech). Harvey will introduce the status and outlook for the LHC, its past and present and near term outlook, and provide a panorama of the future including some of the leading programs. read more
  • Video on Quantum Computing; has lots of math. 1.5hr (suggested by GeorgeG) https://www.youtube.com/watch?v=F_Riqjdh2oM
  • BBC Horizon video, “Pluto: Back from the Dead” 1hr (PeterA)
  • BBC Horizon video, “Britain's Next Air Disaster? Drones.” 1hr (PeterA)
  • Other Mark Rober youtube videos (he did Squirrel vid) https://www.youtube.com/channel/UCY1kMZp36IQSyNx_9h4mpCg
  • Bees. I was an amateur beekeeper for fifteen years. (Howard Cohen)
  • short talk on the changes in dentistry due to technology. Starting with digital x-rays and the automation of the molding of teeth, to maybe simulation of orthodonture. [wording: John Rudy] (David Brother)
  • Chris Hess: Musicians record themselves at home on their phones. They send me their files and I build virtual video performances in software. We've done a couple dozen virtual ensemble pieces at First Parish since the lockdown started. I work on a PC, with tools in the Adobe Creative suite. If that's of interest, I could do an introduction to the process and tools and then do some Q&A. Zoom isn't directly relevant, although we do stream the stuff I make over Zoom at virtual Sunday services at First Parish.
  • Election security, allegations, concerns, why is it so hard to have a closed and secure system? Securing mail-in voting; how states got it to happen. Involve Town clerk or rep to participate? (GeorgeB to follow-up)
  • Revisit Cloud Storage Options (update from December 2019, steveI)
  • The first LASER of 2021 explores the relationship between humans, DNA, and data, featuring media artist and TED speaker Refik Anadol in conversation with Dr. Robert Grass from ETH Zurich, and Christine Choirat from Harvard and the Swiss Data Science Center. https://www.youtube.com/watch?v=yCMaMEyYpdw (90 min)
  • Big Dig A super presentation at the library in January. First part is history, rest is engineering.
  • This might be a good filler for an open spot at our meetings. https://www.youtube.com/watch?v=GhsZUZmJvaM The Mars landing with this helicopter aboard is happening today (2/18/21). (Larry Wittig)
  • Topic ideas without speakers
    • home theater, camera monitor, media player
    • Linux or other O/S
    • Headsets and cameras for Zoom; auxiliary microphones?
    • Your experience with Raspberry or other tiny computer
    • Troubleshoot your Internet connectivity
    • Utilities, for a utilities meeting
    • Shelly Lowenthal: Total Commander, Irfanview https://www.irfanview.com/
    • Al Sherman: “Everything” from https://www.voidtools.com/
    • Al Sherman: “Advanced Renamer” from https://www.advancedrenamer.com/ (NOTE Al can be recorded off-line for replay on Weds.)
2020.07.26 07:58 · smismi7

Software Maybe of Interest

Neither the Lexington Computer and Technology Group nor the author of this Wiki page guarantee the application(s) listed here. While we have investigated and tried them ourselves, they come with no guarantee.

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LCTG Management Team
LCTG announcement sending process The group meets weekly on Wednesdays, 10am online. (It has previously met at the Lexington Community Center, 39 Marrett Road, Lexington but has suspended these in-person meetings during the Covid-19 situation.)
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