Overloaded terms

May 11, 2013 47 Replies

The argument about linear power supplies brings up a point that probably deserves its own thread: the overloading of terms. In optics, there are a number of terms that are used in such completely different senses that, though they're familiar, they're hard to understand. ("Dichroic" is probably the leading candidate, although "defocus" is a strong second.)



The poster child for this in electronics is surely "linear". "Linear" voltage regulators take in nearly the same current that they give out, but otherwise they aren't linear in the sense of linear systems theory. The same is true of a lot of the other parts that used to be in any several publications called "linear databook". Linear vs. switching, linear vs. digital, linear vs. anything using discrete time, unless it could be disguised, e.g. switched cap filters and chop amps.



Any other terms that need a spring cleaning?



Cheers



Phil Hobbs


Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 USA +1 845 480 2058 hobbs at electrooptical dot net http://electrooptical.net

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Well, "sci.electronics.design" is the obvious one. Otherwise "Organic" and "Natural" pop to mind. Art

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What needs spring cleaning is your idea of how language works. Our understa nding of what most words mean is highly context-dependent.

Most professions have a couple of thousand words that they use idiosyncrati cally.

I got my nose rubbed in this back when I was learning Science Russian from a linguist, but it's obvious enough. When talking as a chemist I use the wo rds "substitute" and "substituent" to mean something rather different from what I mean when I'm using them in regular English. Physicists have a simil arly idiosyncratic take on the difference between speed (in any direction) and velocity (in a specific direction).

Bill Sloman, Sydney

The "Liberal" word comes to mind. The "Terrorist" word, too.

VLV

"Charge"

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

Cash.

Tim Wescott Control system and signal processing consulting www.wescottdesign.com

"state", when I have my control-engineering hat on and I'm trying to talk to a software engineer about implementing a control algorithm.

"stability", which means something very specific in the context of linear dynamic systems, becomes fuzzy when you're talking about nonlinear dynamic systems, and changes meaning altogether when you're discussing the behavior of a ball in a bowl on a boat.

Tim Wescott Control system and signal processing consulting www.wescottdesign.com

Teddy Roosevelt, as in Arsenic and Old Lace ?>:-} ...Jim Thompson

| James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | I love to cook with wine. Sometimes I even put it in the food.

Leave my credit card out of this!!!

Democracy?

Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico@nctdevpuntnl (punt=.) --------------------------------------------------------------

)

"Solutions" (newspeak for "products")

"Issue" (newspeak for "bug," "defect," and/or "problem.")

Cheers, James Arthur

Il 11/05/2013 14:17, snipped-for-privacy@yahoo.com ha scritto:

What's the correct use of the term issue?

Marco

"Marco Trapanese = TROLL " snipped-for-privacy@yahoo.com hascritto:

** Giant HUH ??

You really are one completely illiterate, wog moron.

F*ck off.

Good luck finding a programmer who has any meaningful idea of "state", other than the one he lives in.

John Larkin Highland Technology Inc www.highlandtechnology.com jlarkin at highlandtechnology dot com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom timing and laser controllers Photonics and fiberoptic TTL data links VME analog, thermocouple, LVDT, synchro, tachometer Multichannel arbitrary waveform generators

It's heavily overloaded with several other meanings, e.g. bonds "issue," your children are the "issue" of your loins, and "Time magazine, January issue."

In this abused content, "issue" is properly a point of discussion, contention, or something to be discussed. e.g. "There's an issue concerning which is better, A or B."

When Internutz Exploder auto-loads yet another virus or Windows throws a BSOD that's not an "issue," it's a crime.

Cheers, James Arthur

Those are two good candidates--'state' especially is analogous to 'dichroic', which means (a) any inhomogeneous material that manages to be wavelength-selective, (b) anything polarization-based, e.g. the colours you get from putting Saran Wrap between crossed polarizers; (c) polarization selective, e.g. Polaroid film, (d) based on thin films, e.g. an interference filter, or (e) something depending on the dispersion of linear or circular birefringence. The meanings obviously shade into one another, so that any of them is defensible, but different terms would be better because the total range is so very broad.

(With all peace to Bill and his no doubt involuntary didactifussitude, there are lots of these terms that frustrate communication rather than promoting it, which is the point of the thread. Jargon is often ugly, so it should at least be clear.)

Cheers

Phil Hobbs

Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net

Those are excellent examples too, Phil. ;)

Cheers

Phil Hobbs

How does Microsoft avoid legal liability for their horrendously crappy software?

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John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

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I'm late to the game, but I'll nominate saturation. Too much laser light and I saturate an atomic transition, but I might not see it if the gain on the Photodiode is too high and it saturates, there may even be some transistors saturating in my PD opamp..

I haven't touched magnetics yet..

George H.

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