DaveE's latest activity

Note that in practice you would have constant factors on each term that in principle convert to the "correct" unit, like for the often...

Any valves should be bellows sealed to eliminate leaks past the valve stem. The image below is of a Swagelok bellows sealed flow...

You might think of this diagram as an ODE. There's nothing wrong with saying ##x(t) +\int{x(t)}\, dt ...## in that context.

It would help us if you said which part(s) of this machine you are interested in designing. The mechanical part, just the software...

So for an x-y plotter, you have two main ways to move the pen. The first uses a moving x-arm and a way to move the pen along that arm...

Just saying hello and look forward to sharing knowledge and ideas on the forum!

I have demonstrated that it is. What is "exactly three equilateral triangles"? Even that requires lot of assumptions. You made them...

That's my point. Ambiguity leads to subjective intepretation. Yup. That's an interpretation. Yup. So is that. Yes. Which would still...

I won't be able to read this until tomorrow, sorry, nor use my battery. The Li On will sleep tonight.

Maybe a flange with a soft metal gasket, like Indium? IDK, maybe it would melt (157oC). Maybe you would want it to melt, like solder...

eBay, maybe inside a broken laser. A-O QS is the way to go like this one. They are driven from a gated HF source (80MHz, maybe 5W...

I'd been thinking of buying a new charger and batteries for AA devices. Looking online, it doesn't appear that any major manufacturer...

Cheap. They put energy into skin with the precision requirements of a doctor. In the mid 1980's I worked on a 532nm Q-Switched laser...

Could you use the valves temporarily to seal the vessel long enough to remove the plumbing and replace it with a mechanical seal, like a...

Because cgs sucks? Sorry, JMHO. STEM students need to know about unit conversions, which they will do while they are cursing the authors...