Em3rgent0rdr

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Happy editing! ~Kvng (talk) 14:37, 6 November 2021 (UTC)

April 2022

This is your only warning; if you add defamatory content to Wikipedia again, as you did at Tom Woods, you may be blocked from editing without further notice. ― Tartan357 ^Talk 21:59, 8 April 2022 (UTC)

Double sentence spacing

Just to let you know, I find the removal of double sentence spacing, as you did at Ground loop (electricity)‎, extremely annoying. There is no benefit to removing them and reverting is difficult without collateral damage if they are mixed in with other edits. See User:Spinningspark/Two spaces at the end of sentences. SpinningSpark 07:53, 18 May 2022 (UTC)

@Spinningspark sorry I won't do that any more. Em3rgent0rdr (talk) 07:56, 18 May 2022 (UTC)

SI unit names

There were two problems with this edit. First of all, SI unit names are never capitalised when written out in full. The abbreviations are capitalised when the unit is named after someone, but not when spelled in full. See International System of Units#General rules. By and large, the same rule applies to other systems of units like the old imperial system, although there are exceptions.

The other issue is that you removed the non-breaking space between the number and the unit. I assume this happened because you are using Visual Editor rather than the source editor and couldn't see it. I can't help you with how to do this in Visual Editor, I'm not sure that it can even handle html special characters at all. However, there is an alternative, the {{nowrap}} template which VisEd should handle and in my opinion is a preferable method anyway. This kind of thing is one of the many reasons I don't use Visual Editor. It leaves behind all kinds of formatting nonsense and redundant code which is obvious in source editing but you can't see it in the rendered page. SpinningSpark 06:49, 20 May 2022 (UTC)

@Spinningspark I'm sorry, thank you for correcting me. I will try to avoid such edits. Em3rgent0rdr (talk) 06:51, 20 May 2022 (UTC)

Don't worry about it. SI capitalisation is something people commonly get wrong. You soon get to learn the rules once you start editing Wikipedia because there's lots of people here who will correct it. SpinningSpark 06:57, 20 May 2022 (UTC)

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Wave Packet

Thanks for your edits on Wave packet!

When making major changes consider opening a topic on the corresponding Talk page to add context that may not make sense in the edit Summary. I will cut a bunch of incorrect stuff from the Significance in Quantum mechanic section, as I mentioned here:Talk:Wave_packet#Dubious,_unreferenced_claim Johnjbarton (talk) 18:52, 22 June 2023 (UTC)

yes, I saw your comment...please go ahead and try to clean up/reorganize that history as you like.

My understanding (I don't know the full history) is that the concept of wave packet and its propagation was understood long before quantum mechanics, and so quantum mechanics is just one application...for instance Group Velocity#History says "The idea of a group velocity distinct from a wave's phase velocity was first proposed by W.R. Hamilton in 1839, and the first full treatment was by Rayleigh in his "Theory of Sound" in 1877." Em3rgent0rdr (talk) 18:59, 22 June 2023 (UTC)

Thanks. I read the first few pages of Brillouin and updated the history to match.

As far as I can tell packets per see only came to be interesting with QM and then later with laser technology they became pervasive. But Born and Wolf say zero about packets so think it all comes a bit later than we imagined. Johnjbarton (talk) 01:32, 23 June 2023 (UTC)

CS1 error on Delta-sigma modulation

Hello, I'm Qwerfjkl (bot). I have automatically detected that this edit performed by you, on the page Delta-sigma modulation, may have introduced referencing errors. They are as follows:

• A "bare URL and missing title" error. References show this error when they do not have a title. Please edit the article to add the appropriate title parameter to the reference. (Fix | Ask for help)

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Delta-sigma stuff

Thanks for working on Delta-sigma modulation. It has been a bit of disaster for a very long time. The DAC section you did some work on is complete nonsense still. The concept of "pulse frequency" there really stands for "pulse density", I presume. The term pulse-density modulation (PDM) seems to be the modern concept, used in both ADC and DAC. I got some books on this, with the hope of writing something sourced, but haven't gotten around to it. Maybe some day... Dicklyon (talk) 06:05, 29 June 2023 (UTC)

haha, yes that article needs quite some work, thanks.

Assuming the digital signal is simply the 1-bit output of a delta-sigma converter, then yes I have seen it referred to as "Pulse Density Modulation" in datasheets (for instance for "PDM MEMS microphones"). And in that case, the digital-to-analog conversion is *really* simple: just any low-pass filter. I just added an edit basically saying that.

I'll have to take a closer look at the article later though. I'm always wary of making edits because I don't know if it is confusing because I don't understand something important or if it is because the article is complete nonsense. Em3rgent0rdr (talk) 06:49, 29 June 2023 (UTC)

You can see our long history of disagreements at Talk:Delta-sigma modulation, but not much follow-through on improvements. A lot of it is still incomprehensible, over-complicated, or wrong, I think. Dicklyon (talk) 17:55, 29 June 2023 (UTC)

Thanks for your more good work on this. But I think your color-on-black figures look pretty awful in the context of WP where dark-on-white is more normal. Can you invert or otherwise re-style them? Dicklyon (talk) 06:19, 2 July 2023 (UTC)

OK, my apologies. The simulator I used (circuitjs) had black background and so did my browser, but tomorrow I will re-edit them, maybe setting the background as transparent and try to tweak the colors scheme to work better with white background. I'm going to take a break from editing it for the next 10 hours or so. Em3rgent0rdr (talk) 06:25, 2 July 2023 (UTC)

Wave packet

I restored content to the lead of wave packet that you had removed pertaining to quantum mechanics. 96.227.223.203 (talk) 15:18, 13 August 2023 (UTC)

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fixed. Em3rgent0rdr (talk) 06:16, 23 August 2023 (UTC)

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ESR

Greetings. You can have a series resistance and a shunt resistance in the equivalent circuit, but you cannot ESR and any other resisters in the equivalent circuit, because the other resisters would represent additional loss. That is because ESR is meant to account for all losses at a given frequency. As such, any additional resisters would add loss already accounted for by ESR.

You can also draw a circuit with an ESC (equivalent shunt conductance) with ESC accounting for all the losses at a given frequency. At a single frequency, you cannot tell the difference between an ESR circuit and an ESC circuit from their terminal behavior.

Folks use ESR because over useful frequency ranges, the value shows low frequency dependence. That is, ESR behaves a lot like a plain old resister.

Bottom line, if you are going to have an equivalent circuit with a series resister and a shunt resister, don't label the series resister as ESR. Just call it SR. Constant314 (talk) 00:07, 15 September 2023 (UTC)

@Constant314 ok, good point. I had used that image because it was what I could find already uploaded to Wikimedia commons and I was not familiar enough with the terms...but looks like I will have to make a new image. Em3rgent0rdr (talk) 00:13, 15 September 2023 (UTC)

That would be for the best. Constant314 (talk) 00:18, 15 September 2023 (UTC)

I ended up drawing this model, since is same as the ieee article I citated which calls them "Rs" and "Rp" except I spelled out "series" and "parallel":

The inductor was just called "L" in that ieee article, but I debated about changing that L to L_{equivalent series} or L_ES but I guess it doesn't matter.

I did do skimming on the interwebs and it seems some do put the parallel resistance in parallel with a LRC, and everyone seems to give them slightly different names, but I decided to stick with how that ieee article laid it out. Em3rgent0rdr (talk) 01:46, 15 September 2023 (UTC)

The advantage of two resisters is that the frequency dependence of the individual resisters is less. Except at very low frequency, almost all the frequency dependent loss is dielectric loss. A good model for that is a shunt conductance $G_{dielectric}=G_{dc}+\omega C\tan(\delta _{\omega })$ where $\tan(\delta _{\omega })$ is the loss tangent which varies slowly with respect to frequency. The cutover frequency G/C is in the 100 μHz range for good capacitors. If you ignore G_dc then you can absorb the rest into C by making C complex. Constant314 (talk) 18:16, 15 September 2023 (UTC)

ok. I don't think I can add those details to this article's section without loosing the audience.

Another "frequency dependence" aspect to resistance I was just reading about is that what I've labeled R_series also experiences the skin-effect phenomenon at high frequencies. Em3rgent0rdr (talk) 18:49, 15 September 2023 (UTC)

Yes it does, but I think that is lost in the dielectric loss. I only mention it to help you avoid making inaccurate statements about the frequency dependence of the parasitic components. Constant314 (talk) 19:04, 15 September 2023 (UTC)

I did do a naming adjustment to use $R_{\text{lead}}$ and $G_{\text{dielectric}}$ instead of $R_{\text{series}}$ and $R_{\text{parallel}}$ to more closely express the components those resistances are representing. The inductance I'm always just calling ESL in both models. And did some other tweaks to wording. I'm going to lay off from editing that page now if you want to correct any errors I inadvertently introduced. Em3rgent0rdr (talk) 21:07, 15 September 2023 (UTC)

I am sure that you are doing a good job. Esr is just one of my triggers. Constant314 (talk) 23:22, 15 September 2023 (UTC)

One of the great things about ESR is that if you know that and the current, it is easy to calculate the lower loss in the capacitor. There are many situations where you can easily determine the current. Constant314 (talk) 01:02, 16 September 2023 (UTC)

Capacitor Q

$Q_{capacitor}\leq {\frac {1}{\text{loss tangent}}}$ Constant314 (talk) 01:01, 16 September 2023 (UTC)

ok, I had to read that article but I think I get that. For the Capacitor's article on Q factor, I'm now just saying the Q factor equation is "for the simplified equivalent series resistance model" and I've just added a "see also" to Dielectric loss#Discrete circuit perspective. Em3rgent0rdr (talk) 02:20, 16 September 2023 (UTC)

October 2023

Hello, I'm BBQboffin. I noticed that you made an edit concerning content related to a living (or recently deceased) person on Lindsay Graham, but you didn't support your changes with a citation to a reliable source. It's been removed and archived in the page history for now. Wikipedia has a very strict policy concerning how we write about living people, so please help us keep such articles accurate and clear. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thank you! BBQboffin (talk) 05:01, 14 October 2023 (UTC)

Ok, thanks for rewording it. For the record, he did specifically say the quoted words in his Tweet. But I will learn to do better. Em3rgent0rdr (talk) 05:27, 14 October 2023 (UTC)

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Fixed. Thank you, Bot. Em3rgent0rdr (talk) 06:20, 16 October 2023 (UTC)

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Phone connector (audio) edits

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fixed. Em3rgent0rdr (talk) 06:26, 15 December 2023 (UTC)

Hall Effect Sensor

Thanks for all your great work on this page! PianoDan (talk) 15:41, 31 December 2023 (UTC)

Thanks! Em3rgent0rdr (talk) 16:15, 31 December 2023 (UTC)

Solve the equation if it is so "easy"

https://en.wikipedia.org/wiki/Sine_wave

https://wikimedia.org/api/rest_v1/media/math/render/svg/11f7f3ec4cdc5ad694b390c5adfcdc0a858f1457

This is not able to be solved into a sine wave output based on time, therefore it is not a proper equation as it does not give a "Seconds" output out. Slingring (talk) 23:32, 4 January 2024 (UTC)

It's not meant to be solved. It is a standard form for representing a sinusoid by its peak amplitude, frequency, and phase. Em3rgent0rdr (talk) 03:17, 5 January 2024 (UTC)

Discovery doctrine

Hello there

I reverted your contribution to this article regarding a statement that the discovery doctrine was incrporated into US law by the McIntosh decision. it is redundant because no one is disputing that the decision incorporated the doctrine into US law and the article already states this several times. Also a community newspaper is not really a very reliable source in legal matters. There has been tens of thousands of scholarly articles about the mcIntosh decision and there is no real reason to highlight one that doesn't say anything new and isn't in a highly reliable source.

Happy to discuss. Aemilius Adolphin (talk) 23:34, 25 March 2024 (UTC)

ok, understood. Em3rgent0rdr (talk) 02:51, 26 March 2024 (UTC)

Uncorrelated noise

Dear colleague, more sources are definitely needed in Uncorrelated noise. I have also changed the text significantly, so please review and feel free to undo my changes. Thank you in advance! Викидим (talk) 06:35, 8 April 2024 (UTC)

June 2024

Hello, I'm Tarl N.. I noticed that you added or changed content in an article, Kelvin, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. Replacing "possible" with "theoretical" implies a soft limit that colder might be achievable with better theories. That is not correct, and none of the sources cited in the article even suggest that. Tarl N. (discuss) 03:34, 6 June 2024 (UTC)

The word "theoretical" doesn't necessarily make such implications. Did some searching, but what I find is saying absolute zero is not possible. Safest wording I can think of right now is along the lines of "which nothing can be colder than" but that is too long. Or just say absolute zero without trying to explain it. But I'll leave that intro alone. Someone else will hopefully come up with better wording. Em3rgent0rdr (talk) 04:21, 6 June 2024 (UTC)

What I gather you intended to convey was "unachievable lowest temperature", but for the lede in an article about the scale, that's excess verbiage. Regards, Tarl N. (discuss) 10:09, 6 June 2024 (UTC)

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Your edits on Johnson–Nyquist noise

Your activity is causing a lot of watchlist activity for me. I plan to take the page off my watchlist for a while. Would you kindly ping me when you are substantially finished with the heavy editing? Thanks. Constant314 (talk) 14:12, 27 June 2024 (UTC)

I think I'm done with the heavy editing. I was going to make a couple more figures, such as showing the intermediate steps in Nyquist's derivation, but I think I've exhausted myself. Em3rgent0rdr (talk) 01:09, 29 June 2024 (UTC)

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