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In this podcast we start out with a review and clarification of concepts covered in our last episode on periodic phenomenon. We then start to tackle the concept of wave phenomenon. These two episode’s purpose is to lay the foundation for some future episodes.

We come up with the relationship between ω and k, λ and f, for waves moving with speed v. We discuss the basic mathematical form for plane waves and spherical waves, in particular what the field of an isotropic radiator looks like.

The episode also has a call for anyone in the Las Vegas area, or would be willing to come to the Las Vegas area on the weekends, to contact me. I am looking for someone to help with the podcast on a regular basis.

On a follow-up on a previous episode, since I showed on the podcast how to leave comments, I actually have been getting a flood of comments, all spam. I like to reiterate, our comments are moderated, so your spam posts will not make it to the website.

I would really appreciate some real feedback on what you would like to see, and what you think I could do to make the podcast better.

 Episode 1 - Periodic Phenomenon: Play Now | Play in Popup | Download (776)

Well this episode is about periodic phenomenon, it may or may not be obvious, but this episode was recorded while I had an “upper-respiratory infection” as my doctor said, but I think it came out ok considering.

I would like to mention again to support the podcast, consider signing up for one of the many free trade publications that are available through our web link.
This episode has a review of the open source free software xmgrace, which requires X11 to run. For more detailed information check out our new course xmgrace101.
This episode also has a short tour of the learningmeasure.tv website, followed by our main feature on periodic phenomenon.

I started to mention that the combination 2πf=2π/T=ω had a name, but I never said what it was, this is called the angular frequency (measured in radians per second). It represents the rate at which phase is changing with time, just like the quantity k=2π/λ=2πf_s is the rate that phase is changing with distance (measured in radians per meter).

Some of this podcast is based on some of the material in our course MEAS102 - SI Units - The Second.

Complex exponentials were briefly mentioned in this podcast. For more information on complex exponentials check out our course MATH110 - Introduction to Complex Arithmetic.

Also mentioned were derivatives, the background material for derivatives can be found in our two courses MATH119-Functions, Limits, and Continuity; and the course MATH120 - Differential Calculus for Measurement. At the time of this writing these courses were not complete, but enough information is provided to describe the nature of the derivative.

 Episode 0 - About Us: Play Now | Play in Popup | Download

For Episode 0 it made sense to make a podcast about the podcast. In this episode the learningmeasure.com website is described, and short tutorials are provided on how to take one of our courses, and how to post your resume on our site. These are two steps required to join our consultant network as also is described in this podcast.

We also discuss what our plans for the future for learningmeasure.com and learningmeasure.tv. Next episode we will return to technical topics, but we thought it would be a good idea to do this for Episode 0.

The course “UNC201 - Uncertainty Analysis of Complex-Valued Measurands” has just been added to the course catalog.

This course deals with the uncertainty analysis of complex-valued quantites, and with measurement equations that contain complex-valued quantites. The prerequisits for this course are “UNC102 - Basic Uncertainty Analysis” and “MATH110 - Introduction to Complex Aritmetic“.

Complex-valued measurement quantities occur frequently in RF and microwave measurements, optics, acoustics, and many other fields. They are often associated with wave phenomenon. When dealing with such measurements, a slightly different approach has to be used for uncertainty analysis. This is what the course is about.