User talk:Omegatron

Vandalism

Per your question on Wikipedia:Vandalism in progress - yep, your handling of the Transhumanism vandal was perfect. I'm always impressed by how quickly trash like this (and subtler stuff too) gets spotted and removed. Keep up the good work. -- Finlay McWalter | Talk 23:34, 16 Feb 2004 (UTC)

:-) Omegatron

Gyrator

Hi Omegatron - nice work on the gyrator. Would you mind telling me what software you used in drawing the circuit diagram...? Suggestion: Let's rename R₁ > R₀, because that's basically given, and R₂ > R, leaving essentially C and R to play with. --Palapala 09:24, 28 Feb 2004 (UTC)

I used Klunky schematic editor. It is online at

http://www.qsl.net/wd9eyb/klunky/framed.html

Then I took the screenshot and edited it a bit to make it prettier. I also drew a bunch of pictures for opamp configurations, so I can make an article on that, but I left them on my work computer. What do you mean that R₀ is given? - Omegatron

Oh you mean that the inductor you would want to simulate would already have the R₁ defined? How about we name it R₁ --> R_L, like a real inductor would have it labeled, and then the other R₂ --> R. By the way, one of those links has the opamp inputs inverted. Do you know if it makes a difference? It seems like it would... - Omegatron

Thanks for the Klunky link. Noticed you changed the text according to the diagram. -- Yes, the Romanian page has the inputs of the opamp the other way around; I'm not an expert, this link shows it the way you did it, I'm a bit on a loss here. --Palapala 20:59, 28 Feb 2004 (UTC)

I will do the calculations sometime tomorrow and double check. And maybe send that site an email if I can. - Omegatron

Thermionic emission

In thermionic emission you added that it was initially discovered by Professor Guthrie in 1873. I did a little searching and the only person I could find was physicist Frederick Guthrie in London who lived from 1833-1886, and did research on heat, magnetism and electricity. I assumed he was the right guy. Then I found Scottish physicist Peter Guthrie Tait (1831-1901) and found he did work on thermoelectricity. Which is right? I assume it is Peter, but I already assumed too much, so I will ask the source and leave it undefined for now... - Omegatron

I wish I knew which Guthrie it was, the source I used did not specify the full name (unfortunately) but I assumed it to be a last name. -- RTC 06:42, 8 Mar 2004 (UTC)

Ok, thanks. I will keep searching... - Omegatron

Omegatron: I wasn't able to get over to the physics library before it closed that day; I'll try again soon if I get the chance.

The Dot project is intended to create maps for the Ram-bot generated articles. See Siler City, North Carolina for an example. The maps on my user page are just intended to track the progress of the project. - Seth Ilys 17:13, 26 Mar 2004 (UTC)

Forced PNG

thanks for figuring out how to force png rendering without altering appearence! Perl 23:04, 9 Mar 2004 (UTC)

Congratulations. That seems to be fairly general... --Palapala 17:19, 2004 Mar 10 (UTC)

Electronics Wikibook

Hi, since you're a DSP engineer, perhaps you would be interested in helping out with the Electronics wiki-textbook. http://wikibooks.org/wiki/Electronics

Yes, I would love to. - Omegatron 20:48, Mar 19, 2004 (UTC)

Howdy Omegatron. Thanks for helping with WikiBooks:Electronics. You mention on page WikiBooks:Electronics:Transistors that CMOS and TTL "are not transistors". Very true, but do you think it would be better to mention them on the "transistors" page (as examples of what one *does* with transistors), or should we move all mention of them to some other page ? -- DavidCary 20:11, 28 Jun 2004 (UTC)

Reason for HTML's irrelevancy

The numeric HTML entities for colon and semicolon are highly irrelevant, because they are never, ever used. In fact, the only time I have ever seen a numeric entity used for either of these is in the Template:Punctuation marks box, and that's only because Wikipedia attaches a special meaning to a colon, not because the HTML needed it for any reason. You can represent the character A in HTML by typing A, but no one ever does, because it's never necessary or useful. The same goes for the numeric entities for the colon and the semicolon. —Bkell 21:35, 5 Apr 2004 (UTC)

Right... But I needed to know it in order to put it in the punctuation box, and the information wasn't on WP.  :-) I figured that was reason enough to include it. Maybe it should just mention that HTML entities are the same number as ASCII for letters and punctuation? - Omegatron 21:38, Apr 5, 2004 (UTC)

Well, Character encodings in HTML already says, "Decimal and hexadecimal HTML character references can also be used, based on the Unicode numeric code for the character encoded." That should be enough information for anyone who needs to encode a colon as :. I imagine they would visit HTML instead of Colon (punctuation), as HTML is more specific to the problem they are having. (To be honest, I would go straight to the HTML spec myself.) There is no reason to include a numeric HTML entity on every page about a punctuation mark or letter or number or other character, especially if it's one that is normally just typed. —Bkell 21:47, 5 Apr 2004 (UTC)

Diagrams

Mostly I use Adobe Illustrator, sometimes augemented with MathCad for graphs, etc. As you can probably guess I enjoy doing them, so if you need any diagrams let me know. I'll see what I can do with a plot of the filter curves for dichroic prism -- DrBob 20:15, 8 Apr 2004 (UTC)

Transistor

Looks like transistor has a big chunk of repeated text. Are you working on fixing it up? I don't want to wade in while you're at work :) Gwimpey 00:49, 5 Jun 2004 (UTC)

String instrument

"Physics of music is related, right?)" Yes, I certainly agree. Opus33 15:39, 9 Jul 2004 (UTC)

Check out...

...what I wrote at the very bottom of Wikipedia talk:Template messages. I've told this to several other Wikipedians bu no one has responded yet. 66.245.23.108 00:43, 13 Jul 2004 (UTC)

TeX Problems

Omegatron,

On Meta:Help talk: Formula, you were asking about where to report some TeX bugs on Wikipedia. There's a new Wikipedia Bugzilla set up at bugzilla.wikipedia.org; if you're still having problems, you can report them there. I'd be happy to help write a bug report if you'd like; you mentioned problems with other things missing, so I'm not sure what the extent of the problem was. -- Creidieki 22:18, 17 Aug 2004 (UTC)

Oh good. I will try to report it. - Omegatron 02:13, Aug 18, 2004 (UTC)

regards from Lobster

Nice page - but was dissapointed that the plug-ins do not work with version 1 of firefox - here is hoping they will soon - Lobster

I'm not sure why they created it; there are tons of other helpful pages out there. But I will help contribute. Yes, I installed Firefox 1.0PR just a few minutes ago and I am very disappointed that some of my favorite extensions do not work yet. I should have waited.  :-) - Omegatron 21:25, 18 Sep 2004 (UTC)

sorry not quite sure what I am doing but hopte this comment gets to you :-)

I think the XUL (type of XML) will be updated soon and then the plug ins will work - but at the mo it is not working - here is hoping

:-)

Foxy Lobster

good photo

Congratulations, people think your photos are good enough to copy: http://nl.wikipedia.org/wiki/Elektrolytische_condensator

--DavidCary 08:37, 20 Sep 2004 (UTC)

Answer to your question at Talk:Orthogonality

can you have infinite-dimensional vectors?

Except that it's the space that is infinite-dimensional, rather than the vectors themselves. The two most well-known infinite-dimensional vector spaces are $\ell ^{2}$, which is the set of all sequences of scalars such that the sum of the squares of their norms is finite (for example (1, 1/2, 1/3, ...) is such a vector because 1^{2 + (1/2)2 + (1/3)2 + ... is finite) and L₂, the set of all functions f such that}

$\int _{\mathrm {whatever\ space} }\left|f\right|^{2}<\infty .$

("Whatever space" could be for example the interval from 0 to 2π, or could be the whole real line, or could be something else.) Michael Hardy 19:31, 30 Sep 2004 (UTC)

Note of appreciation

Thanks for exploring the "dynamic range" issue a bit on the talk page. I checked your user page, and as a newcomer to Wikipedia want to let you know how much I appreciate your technical contributions here. You've certainly added to the place!--NathanHawking 20:10, 2004 Oct 4 (UTC)

Wikipediholic test

I do mark the errors in books I read, and have been known to send them back to the publishers in really bad cases... -- Graham ☺ | Talk 22:04, 11 Oct 2004 (UTC)

JFET picture

re: User_talk:Rparle#JFET_picture

Thanks, I was just finding my way around Photoshop when I did that one. As for making more, do you mean for the other types of transistor? I suppose I could, though I'm still not as quick as I might like to be and I'm back in college now so my free time is more limited. I do recall doing another one of a MOSFET for a college project; I'll see if I can dig it out. —Rory ☺ 18:26, Nov 15, 2004 (UTC)

Thanks for help on Shannon theorem

Hi Omegatron, thanks for your quick reply on my question on the Nyquist-Shannon_sampling_theorem. It helped a lot! There only is one thing i haven't understood clearly: let's imagine a soundcard that samples audio input at 44 KHz (you see, the same with your explanation). What the soundcard does, is it takes a record of the voltage every .000025 seconds.

If you drew all those recorded values on a time-voltage diagram (time being the variable), you'd get a diagram full of dots. To reconstruct the original signal, you could draw lines between each dot and its next neighbor.

That would be quite a close approximation, but you couldn't find out what happened between those .000025-second-snapshots. Maybe there was a high voltage burst (being a Dirac distribution for example) somewhere between the intervall 1.000025 s and 1.000030 s.

Maybe you understand the problem I see - but maybe I just made a mistake at some point in my thought.

Thank you for your help, --Abdull 18:56, 15 Nov 2004 (UTC)

Copyright data request

Dear Omegatron, I have translated your article Thevenin's_theorem for the it.wikipedia.org but I can’t download the image Thevenins_theorem.png because there isn’t any information about copyright. Please can you upgrade the image with the copyright data? Thanking you in advance. I follow your works on en.wikipedia and I find they’re very interesting (I think that I will translate many others). With best regards, Piero (http://it.wikipedia.org/wiki/Utente:Piero)

I'm sorry. I didn't draw that diagram. The original is at en:Image:Thevenins_theorem.jpg and was drawn by User talk:Sim. I started drawing a newer version and will finish it if you'd like... - en:User:Omegatron