AT&T Tech Channel - 2012-04-03
For more from the AT&T Archives, visit http://techchannel.att.com/archives On an elementary conceptual level, this film reflects the multifaceted scientific hyperthinking that was typical of a Bell Labs approach. Host Dr. J.N. Shive's presence as a lecturer is excellent - it's understandable by a layperson even when he branches into equations, because he uses copious amounts of real-world examples to bolster the material. Shive's role at Bell Labs was more than just a great lecturer: he worked on early transistor technology, inventing the phototransistor in 1950, and the machine he uses in the film is his invention, now called the Shive Wave Machine in college classrooms. Dr. J.N. Shive of Bell Labs demonstrates and discusses the following aspects of wave behavior: Reflection of waves from free and clamped ends Superposition Standing waves and resonance Energy loss by impedance mismatching Reduction of energy loss by quarter-wave and tapered-section transformers Original audience: college students Produced at Bell Labs Footage courtesy of AT&T Archives and History Center, Warren, NJ
You can tell from his expressions that this guy is having a blast talking about this.
Amazing. So clear and direct. I find the further I go back in history, recorded science lectures seem to just make way more sense than today's classes. I'm not sure why. Maybe they weren't trying to teach so much at once then, and they had a script, so the material was presented in a very logical order, but this is definitely easier to understand for me than a lot of more modern videos that seem to just "wing it".
I was wondering the same thing. It is more to the point and informative than most videos.
They had less obvious restraint in regards to a creator. When they really went after an atheist (nothingness) agenda, that had trouble teaching things like this. Because this, and many other things, proves the existence of something, at the very least.
The explanation's rather simple I believe: it's laziness. It takes real effort - persistence, thoroughness, time - to produce instruction of this quality. That's been replaced all too widely by superficiality, glitz and the desire to be considered clever without the requisite work to become clever. What's one of the most common complaints about YouTube tutorials? Too much attention paid to background music. Dr Shive's teaching is devoid of such frills - and brimming with evidence that he really knew what he was talking about and went to considerable lengths to communicate it effectively. The same's true, for example, of w2aew's YouTube videos and content from the Khan Academy. There are no shortcuts to excellence.
You should check out 3Blue1Brown. He's doing some good stuff.
@Jason McCann few pple know it from the ground up, MIT or else. The MIT online classes of quantum mechanics are piss poor
I wish I would have had someone like him when I was studying to get my Amateur Radio license, I might have accidentally learned something instead of just memorizing the correct answer.
look at the smile on his face when he talks through the megaphone.
This video acts as an impedance matching network between this topic and my brain. Perfect!
Multiple "aha!" moments, absolutley Priceless!!!!!!
Information is sliding so pleasantly and efficiently into my brain! So much respect for this era of engineering.
I remember teachers like this as a child, pleasant, refined, disciplined, and often very conservative. They did not suffer fools lightly. It is a sad reality that the ability to calculate in mathematical terms is extremely difficult for so many people. The best way to counter this condition is through constant repetition. Practice practice practice from a young age, as soon as possible. The torture of that exercise will pay huge dividends later in school. So many geniuses become lost in this struggle, the old left brain right brain argument. Matching the imaginative dreamy brain with the analytical is another form of impedance resulting in miraculous new innovation. Happens every time.
My brain has an impedance mismatch.
This dude has a very slightly evident grin that appears when he knows he's explaining something enlightening. You can tell he loves what he's teaching.
WHO WOULD DISLIKE THIS!?
These Shive Wave Machines are wonderful! I first heard about them when I was fifteen. I read Popular Electronics magazine and enjoyed John Frye's monthly Carl and Jerry stories. This story appeared in the December 1961 issue, titled "The Bell Bull Sessions". A few years later, as a college freshman studying electronics and living in a rented room away from home for the first time, I built a crude one. With it, I gave a number of demonstration lectures to physics, science, electronics, and microwave classes, nearly all the students older than me. Great fun for a young kid! As a result, I was approached about building these to be included in a science lab being sold by Hickok Teaching Systems. I built more than 100 for them, over two summers.
At the Whole Earth Catalog demise party in June, 1971 (I was a WEC production staffer) held at the Exploratorium science museum in San Francisco, I met Frank Oppenheimer, the founder and director of the Exploratorium. A couple of months later, I took him one of my machines. It soon became a permanent exhibit, set up inside a huge glass case and operated remotely with solenoids controlled by the viewer. (Greatly reduced the possibility of damage!). The last time I visited the Exploratorium in the mid-'90s, it was still an active and popular exhibit, although the card with my name on it had disappeared. (I was amused by that, and delighted that it was still in use!) I think it's gone now....
I've got one of the ones I built left, packed in a portable case... I'm putting it up on Ebay today... Hurry if you are interested!
+Fred Richardson Here's the online link to the column: http://www.americanradiohistory.com/Archive-Poptronics/60s/61/Pop-1961-12.pdf
+Ward Silver, Thanks for the link to the Carl and Jerry story, page 82. Was fun to look through a magazine I read as a teenager! --Fred
Best ever seen wave tutoriral
Really enjoyed !
Impedance matching looks so simple and effortless...
As an old-school extra-class amateur radio operator, I recommend this video as an aid to understanding feedline/antenna matching.
7:30 is the visual demonstration of how a standing wave forms that I’ve been wanting for so long
this video is so addictive, the more you watch, the more you like
This is so much more than clear, concise education: It's poetic. Absolutely amazing.
Remarkable outstanding presentation! imho Very Thanks and Very Well Done to this exceptional teacher (to his memory of course).
At 05:09, I think that load impedance is not correct: positive reflection happens on open circuit (not short circuit), and negative reflection happens on short circuit (not open circuit).
Absolute genius. Masterpiece
Love the use of big fractions fractions at around 18:35. When I was in school, oh so long ago it seemed perfectly intuitive for me to use =>1 fractions.
I was told that this was wrong, somehow -- though my work was accurate, correct, documented, and mostly legible, I tended to skip the needless reduction of fractions at every step that they expected it of me. Conferences were held, admonishment was dolled. I now feel vindicated by this verification that there is no shame in expressing a number as "seven halves," as everything presented in this film is perfectly cromulent and expertly explained.
Thank you.
What did they want you to use, mixed fractions? Mixed fractions are almost never used in math and science because they make arithmetic harder.
Yeah I've always been surprised seeing people, mostly Americans, systematically transforming their results to mixed fractions, going so far as to call fractions >1 "improper". It makes sense to show mixed fractions to pupils -- seeing 5/3 written as 1+2/3 can help kids get an intuition for what fractions represent -- but once you've understood that, most of the time it's not practically useful.
@milaweck Know this is old, but your observation makes sense. We Americans use the imperial system, so ''improper'' fractions have a good deal of practical use to us.
Ditto, Adam Perry...loads of arguments and discussions with mathematics teachers in high school. But the methods taught to me by my engineer father worked best for me! As long as my answers were correct in the end....
If any "God" exists, I would like this guy be blessed for eternity! and I'm even not "a believer"! Very Well Done (again) and thanks to the people have made possible to share his so clear and bright understanding :bd
I remember seeing this film ... High School electronics class I think. Great subject .... Goo d presentation!
One of the best videos /films I have ever seen in my life !
Great stuff!
Old school is the best ;)
Amazing Analogies Class!
Thanks a lot for this amazing video. I love that wave model! Very creative idea.
Great film
this channel has become one of my favorites on all of YouTube, and why youtube is so amazing. i'm one of those math-challenged liberal arts majors (lol right) but i found the UNIX video really cool as a backgrounder on computer science in general as well as UNIX, coding etc etc. this vid is incredibly educational as well. awesome stuff, ATT.
That's exactly what I thought! :-)
Instructions for building an inexpensive mini wave model somewhat similar to what is in the video are available at http://www.instructables.com/id/Mini-Wave-Model-1/
amazing. great job wherever you are man
May you rest in peace. I deeply appreciate all the knowldge and the laugh. I needed both.
Thank you for posting this.
Very informative. Thanks for posting this!
I love this. It's so awesome I have no words.
Excellent. Hi is so enthusiastic :) That's how knowledge should be shared.
really great, thanks for sharing
Fantastic!
This is so amazingly clear and easy to understand!
This is awesome
true genius
Amazing. I whish this were the standard class. Nowadays we are taught a sea of formulas with the real concept completely lost.
surfs up Waves awesome dude.
Maximum shear occurs at nodes in structural analysis. FEM today makes this much easier to calculate. Awesome film Thanks.Shalom
Beautiful handwriting and drawing.
appendix section of youtube
Just Awesome 👏
Re: DusteDdekay's comment: The old lecture works partly because it does not unnecessarily digress into underlying principles at key points (e.g., why element length tunes resonance), leaving students to inquire and discover or figure out for themselves. It is the overview-and-reflect vs. the boringly-detailed-building-block approach to teaching. It took me 20 minutes to teach logarithms to a friend's daughter after two weeks of detailed class on the subject failed her. Good editing is key.
David Thompson - 2019-03-10
This film is a real gem. I'm an engineer (and used to be a professor) and the clarity of explanation in this film is exceptional. It is the best explanation of SWR that I've come across to date. This man would have been a favorite teacher had I had the opportunity to sit under him.
Ralph M - 2020-03-05
indeed, this was very well done