I am using Leo Bodnar’s fast pulse generator (SMA) in my lectures to teach transmission lines. With sufficient length (I use ~1m) it works quite well to demo with a low cost scope. I originally bought it for TDR with 40GSPS/15GHz scope, which works very well with few orders of magnitude smaller lengths. Old on has upper length limit with 10MHz fixed frequency. There is a new one available with external sync and variable frequency, but I have not bought/tested it.

> Except that after 11 years the equipment will have broken down or be obsolete, at which point you have to start over.

If my calculations are correct, that setup probably lasts at least 30 years. This is not a cell phone battery and panels do not degrade that fast.

A similar concept has been used for university lectures to start 15 minutes after the full hour. This was due to nobody having watches and everything being synced to the church bells ringing at the full hour. Then you had 15 minutes to get to the next lecture (in another building). Starting time was given as ct (cum tempore, with time) or st (sine tempore, without time). Usually only st was marked as everybody assumed the 15 minutes delay.

https://en.wikipedia.org/wiki/Academic_quarter_(class_timing...

In my EU country Gardasil 9 is the most common HPV vaccine nowadays. This protects against 9 most common strains. I would assume the same is true in other countries. We have gone from HPV 16/18 -> +6/11 -> +31/33/45/52/58 protection with 2/4/9-valent vaccines.

Ref: https://en.wikipedia.org/wiki/HPV_vaccine

If the input to the weather forecast is mostly /dev/random, then yes, that is called a lie. There is a very big difference between modelling chaotic systems and providing random noise.

Ah yes, managing people, science, and research and development are well known to be very predictable and stable, easily modeled even by a teenager.

Taiwan strait is filled with offshore wind turbines from both sides. This is not an issue for PRC nor Taiwan.

Either it is not, or is a huge issue. Those windmills could be deployed on purpose

Few things for starters:

- you have to look at it in frequency domain as well;

- speed of light is too slow;

- often capacitors are inductors, even more so when mounted on PCB;

- capacitance is not what is written on the component.

I am teaching this to robotics and computer engineering MSc students. Quite nice intro book into the topic that I recommend to my students: https://www.oreilly.com/library/view/principles-of-power/978...

Most common quaternary storage system is probably DNA.

Funny thing is, that news, by definition, are written about things that are newsworthy. Newsworthy things are not common, but exceptional and rare. Thus one shall not worry too much about the news as those things practically never happen in everyday life.

In signal you can change your username any time.