Measurement Overkill and why “Accuracy” is the Wrong Word – #42
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Metrology Electrical Engineering Podcast – EEs Talk Tech on YouTube

Metrology Podcast

May 20th is a special day – World Metrology Day! Get a bit of history and learn about all things metrology when you join Daniel Bogdanoff, Bob Stern, and Chris Cox in this special Metrology Day electrical engineering podcast!

App note mentioned by Bob: https://bit.ly/DecisionRules

More about Keysight metrology, calibration, and services: https://www.keysight.com/find/metrology

Topics and time tags:

0:00 World metrology day, and a brief history of the meter and the ohm

2:00 Keysight University has FREE test gear courses!

2:45 Bob Stern, Keysight Metrologist Chris Cox, Keysight Regional Metrologist

4:30 Why does metrology matter? How does it impact us? The global economy relies on a consistency of measurement and test, which is why metrology is important. It allows measurements made in one country to be used and replicated in other countries.

7:25 Metrology and measurement traceability is important. An unbroken chain of traceability is one of the key components of metrology and calibration. It’s a bit like a game of telephone leading back to SI units.

10:00 Keysight DMMs get calibrated off the first commercially available Josephson Junction – a tool that uses quantum physics to provide a very stable voltage.

11:16 Accuracy vs. Measurement Uncertainty A production engineer might say “accuracy” but really it’s all about “measurement uncertainty” Vocabulary of international metrology (VIM): https://www.bipm.org/en/publications/guides/vim.html

12:15 A practical example of how different instruments have different levels of uncertainty

13:45 What’s the significance of measurement uncertainty for a user of test gear or a production engineer?

15:33 The internal adjustments that the factory makes to an instrument are some of the most closely guarded intellectual property / trade secrets.

18:15 The Army uses mobile Josephson junctions to test the DMMs used in Apache helicopter field testing.

18:45 Metrology overkills – times when people went overboard with their measurement uncertainty

21:10 How do you quantify measurement uncertainty? There’s “test uncertainty ratio” which uses your expanded measurement uncertainty.

23:00 You can also get to percent risk, which is easy to wrap your head around. Bob Stern and Chris Cox authored some papers on this topic.

24:00 Why do people make measurements in the first place? There are no perfect measurements

26:45 Metrology in the government/military vs. private sector

29:00 There are a lot of factors for metrology equipment calibration and the engineering metrology equipment. There are different “levels” of calibration and different depth of reporting

IoT For All Podcast
IoT For All Podcast
IoT For All
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In episode 99 of the IoT For All Podcast, Augury Co-Founder and CEO Saar Yoskovitz joins us to share his experience founding and growing an AI-based Machine Health company. Saar talks about the challenges and benefits of building a full-stack IoT company, what he learned while raising $55m in D-series funding, and some of the greatest challenges involved in implementing AI in IoT solutions. Since co-founding Augury in 2011 Saar has been working with customers and partners to transform how they work to make products, deliver services and improve lives through real-time insight into the health and performance of industrial equipment and systems. Saar holds a dual bachelor's degree in electrical engineering and physics from the Technion, the Israel Institute of Technology. Before launching Augury, Saar worked at Intel as an Analog Architect. Interested in connecting with Saar? Reach out to him on Linkedin! About Augury: Augury works with the largest manufacturing companies, like Colgate, Essity, and Hersheys to make their production lines more reliable and productive. We offer Machine Health-as-a-Service - a full-stack solution from IIoT-enabled sensors to specific outcomes and actionable insights that predict and help prevent unplanned industrial equipment failures and downtime.Key Questions and Topics from this Episode: (00:57) Intro to Saar (03:33) Intro to Augury (05:28) What are some of the benefits and challenges with going full-stack as a solution provider? (12:51) Are there any use cases you can share? (16:34) What’s your view on the current state of the industrial and manufacturing IoT space? What has COVID’s influence been? (22:51) What’re the biggest challenges involved in implementing AI into your solutions for customers? (26:23) What was it like raising funding? What do you feel are the biggest challenges for IoT companies looking to raise funds? (30:27) What are the biggest challenges for companies looking to grow a global presence? Do you have any advice?
38 min
The freeCodeCamp Podcast
The freeCodeCamp Podcast
freeCodeCamp
Crossover Special: 10 Years of The Changelog + 5 years of freeCodeCamp
In this special crossover episode, we celebrate 10 years of The Changelog. It's the home of the biggest podcast focused on open source, and a favorite of freeCodeCamp founder Quincy Larson. This 4-hour episode is actually 2 interviews: 1. For the first 2.5 hours, Quincy interviews Changelog co-hosts Adam Stacoviak and Jerod Santo about how they got into software development and podcasting, and the history of their legendary podcast. 2. Then we end with Adam and Jerod turning the tables and interviewing Quincy about the past and future of freeCodeCamp.org. If you haven't heard of The Changelog before, it is website that hosts a podcast about open source software. Each week they interview new developers from around the software galaxy and explore what makes those projects tick. Adam Stacoviak founded The Changelog exactly 10 years ago. And Jerod Santo joined as co-host 7 years ago. Together - across 370 episodes - they've interviewed everyone from programmer legends, to the maintainers of open source projects you may have never even heard of. Quincy has listened to hundreds of The Changelog episodes over the years, and credits The Changelog with giving him such a broad view of open source, and the philosophies of the developers who started these projects. These interviews were conducted in-person in Adam's Houston-based studio. If you haven't yet, you should subscribe to The Changelog podcast. They have a variety of shows. We recommend starting with their Master Feed, which lets you explore all of their shows: https://changelog.com/master And check out the special website they built to celebrate their 10 year anniversary: changelog.com/ten Follow Adam on Twitter: https://twitter.com/adamstac Follow Jerod on Twitter: https://twitter.com/jerodsanto And Quincy is: https://twitter.com/ossia
3 hr 52 min
Soft Skills Engineering
Soft Skills Engineering
Jamison Dance and Dave Smith
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In this episode, Dave and Jamison answer these questions: Questions * My coworker Alice reached out to me in confidence to say that another coworker, Blake, is leaving in about a month. Blake told Alice in confidence that they intend to put in their two-weeks notice next week. Making things better, Blake is our entire ops team (<3 bus factor of 1) and our startup was not planning on hiring anyone else into that team for three more months! Do I have an obligation to respect their twice-removed confidentiality? Or do I have an obligation to the company (and my remaining coworkers) to push to start hiring their replacement sooner? I’m concerned that if I do nothing, it’s a risk to the company because Blake plays such a critical role and we did not setup Blake in an HA configuration, but I’m also wary of doing something that seems like an ethical gray area. I’m not in management, so I have no ability to directly start hiring. But I’m a senior IC and pretty heavily vested in the success of this company. And bummed about my dear departing friend/colleague! And bummed that my workload is about to go up as all of us learn to be ops engineers, too! Help! I don’t want to have to take the soft skills patented advice of quitting my job when the startup crumbles under the ops team’s departure, so what do I do instead? * Someone I worked closely with on a previous job has reached out to me, asking for a referral and recommendation to my current company. The problem is, I really didn’t enjoy working with this person. The experience was so bad it prompted me to leave that job for another one. I didn’t want to burn bridges, so when I left the job, I cited personal reasons and did not mention the real reason was that I hated the interpersonal dynamics there. It could be the case that their toxic behavior was partly due to the toxic organization we were in. It’s also possible that over the years they’ve matured, but I don’t know. On the other hand, each time I’ve asked someone for a referral, they’ve always done it, so I assume that there’s an expectation to refer previous coworkers? I can’t in good conscience recommend this person to my current company. If I provide my true opinions, I suppose they’d eventually find out. Can this person sue me for defamation if they don’t get hired?
29 min
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