User talk:Jcwf

Welcome!

Hello, Jcwf, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

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I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Again, welcome!  -- Longhair\^talk 23:02, 7 November 2006 (UTC)[reply]

Paramagnetism

Jcwf, Thanks for the great writing and editing and for the time you have donated to this project. I will review the page again when I have more time but I wanted to let you know that I got your note and that your edits seem sound and certainly well intentioned. I think your level of expertise is above mine on this subject. A general comment that is true of most pages in Wiki is that we should quote more sources and use footnotes. External links can be added too. Thanks for all you do. Electricmic (talk) 22:32, 1 January 2008 (UTC)[reply]

Spectroscopy

Hello. It appears that I excised that information, but I could not tell you why. I am well aware that the information is legitimate and I suspect I removed it because it was redundant or did not fit in the article's structure as it was in April and I was more concerned about resurrecting a badly-formatted article. I have tried to clear up the classification issues surroundings spectroscopy before, but it appears that whatever existed of my attempts has long since been removed. Srnec (talk) 05:03, 14 January 2008 (UTC)[reply]

Materials techniques

Yes, I agree with you that this serves a very useful purpose. Where's the proposals page? Can you post me a link? I'm in biomaterials/bioengineering, studying characterization techniques and getting blown away with how many there are and how many acronyms I have to know. I won't be able to do much editing due to school right now, but will add when and what I can. I think you're doing a good job putting these all in one place and editing articles here and there. --Amaltheus (talk) 07:04, 16 January 2008 (UTC)[reply]

I'm not sure what a portal is, though. I would like to call it "characterization techniques," which is what I do, characterize materials and matter. I'll keep adding as I can. The microscope articles are in sad shape, but many have editors dedicated to the article as it is, no matter what is wrong or missing, or, some are devoted to the biological sciences, even for techniques with extensive use and histories in the materials sciences. I do both, but most of my background is in materials science. --Amaltheus (talk) 02:08, 17 January 2008 (UTC)[reply]

Surface methods list

Hi there, Go ahead if you want. I initially created this page for people searching via search engines who need a navigator through the jungle of acronyms (as it is sometimes not bothered on scientific pages to elucidate them). It can be supposed that one knows his own metier. The list that is supposed to be merged is ordered and very comprehensive but please make sure that a relink remains in place if you intend to carry out the merger.Slicky (talk) 14:08, 19 January 2008 (UTC)[reply]

Re: Scientific techniques

I'm not discouraging the potential project/portal (or whatever). I'm just saying that you raised it on a wrong page (heck, the title on that page says it's portal, yet that page is for WikiProject). If you want a discussion, head towards village pump OhanaUnited^Talk page 20:39, 19 January 2008 (UTC)[reply]

Mass spectrometry article categorization

Since the category Mass spectrometry is a subcategory of Scientific technique, any article in the Mass spectrometry category does not need to be in the Scientific techniques category. See WP:CAT and WP:SUBCAT. So Inductively coupled plasma mass spectrometry‎ doesn't need to be in Scientific techniques since it is in Mass spectrometry. I also noticed that you put Field emission microscope into Scientific techniques when a better move might have been to put Category:Microscopes into Scientific techniques. I don't want to throw cold water on your scientific techniques effort, but be careful not to over categorize. --Kkmurray (talk) 22:54, 19 January 2008 (UTC)[reply]

If you don't want to throw water it would be nicer to state things without warnings such as "be careful not to ovecategorize." The warning to be careful did not enhance the message. It seems to me the urge to scold is often so great in Wikipedia interactions that the message gets lost. Are you saying categorize only in the lowest subcategory on Wikipedia in general? --Amaltheus (talk) 01:20, 20 January 2008 (UTC)[reply]

As I stated in the the village pump my categorization was very rough: I simple wanted to make sure I got all techniques covered somehow, so that we could later find them back more easily for proper organization. Some had no such category at all, others have tags that lead to categories that contain techniques but also other things. Sometimes it is the physical phenomenon, sometimes the instrument (the microscope rather than the -scopy) that gets categorized and that does not make things any easier to find. One of the things I would like to achieve is to come at a more sensible and less chaotic system of entry. I have been searching in wiki for a week or two now and I still discover useful bits and pieces here and there. It's a mess. Kkmurray.

Jcwf (talk) 04:16, 20 January 2008 (UTC)[reply]

I did look at various categorizing schemes on Wikipedia. My thought is developing a series of sub-categories might also get you a better assortment of the techniques, and maybe others will want to edit within a subcategory. The techniques subcategories might be by the various things you suggest for the template. I might do Characterization techniques using ionizing radiation, Characterization techniques using optical light. --Amaltheus (talk) 07:35, 20 January 2008 (UTC)[reply]

I don't mean to scold. Sorry if it came off that way to anyone. It was meant to be advice and encouragement. I think that organizing scientific techniques is a great idea. If you are not already aware, there are of a couple of related Wikiprojects: WikiProject Mass spectrometry, WikiProject Spectroscopy, and WikiProject Chemistry. If you need any help, peer review, etc., those are good places to go. Good luck. --Kkmurray (talk) 19:00, 22 January 2008 (UTC)[reply]

Sunbittern

No worries. I was going to format all the names, but with a study that big et al- -ing is sufficient. Feel free to copy paste the ref elsewhere if you cite it again (I tend to copy paste cites all the time). Sabine's Sunbird talk 03:11, 7 July 2008 (UTC)[reply]

Sure is. I like the Kagu and Sunbittern being off on their lonesome together. Sabine's Sunbird talk 03:27, 7 July 2008 (UTC)[reply]

Re:Hindi Spelling

Hello Jcwf. Thanks for your comments on my talk page. February is written like this: फ़रवरी and pronounced farvarī. I hope this helps. With regards, Anupam^Talk 02:05, 18 July 2008 (UTC)[reply]

Evidence n stuff

No, cladistic analyses are always inductive logic-based inference. The evidence in this case is simply the linear DNA sequences, aligned or not. These tell us that most "higher waterbirds" are very closely related, to the point of apparently forming a clade, and that this emerged close to the K-Pg boundary. But how close? The evidence doesn't tell us that, though it is more compatible with some possibilities than with others, and of course it roundly refutes some.

So we need inferred hypotheses. They may or may not be correct however, being very sophisticated best-guesses resting on certain assumptions. If any of these fails (and at least one of the two key assumptions that differ in the study you cite from most others is known to fail more often than not), the entire inferred hypothesis gets knocked from its foundation - it may still be right, but there is no way to tell whether the results are right if the analysis made a key assumption in error.

You'll probably want to check out this, this, this and this. Dysmorodrepanis (talk) 00:31, 29 July 2008 (UTC)[reply]

Properties and uses of metals‎

Hi. When content is merged to another article we need to keep the history for attribution purposes, so we just redirect. See WP:MERGE for more info. -- zzuuzz ^(talk) 03:31, 3 August 2008 (UTC)[reply]

Metallic bond

Great work with the article. I have submitted some suggestions at Wikipedia:Peer review/Metallic bond/archive1. COntact me if you ahve any questions. Nergaal (talk) 10:53, 3 August 2008 (UTC)[reply]

History section

I think you are misreprenting Hume Rotherys views and Hume Rothery himself. He was a very good communicator and very enthusiastic that is true, but you make him sound like some sort of opportunist who was later debunked following the (sic) "debacle" of the free electron theory- bit hard don't you think? Aren't scientific models supposed to be used and then "pushed" so that they fall over - I thought that was part of the scientific process. --Axiosaurus (talk) 10:43, 4 August 2008 (UTC) Well thank you for your response.--Axiosaurus (talk) 13:40, 4 August 2008 (UTC)[reply]

Respiratory System

You make an excellent point regarding the need to make this article less centered around humans/mammals. In this manner, the article will likely also become more specific and accurate. Thanks for the suggestion and for leading me to the page indicating that effort was being made to "clean up" the entry in general. I have expertise in some areas that have been discussed for clean up so will attempt to make more improvements. LLDMart (talk) 13:20, 19 August 2008 (UTC)[reply]

Tissue (biology)

Some nice entries are beginning on this page regarding plant tissue. Might you be willing to take a look and provide a bit of guidance regarding unity of style for the page? I'm getting lost in my lack of plant knowledge such that I'm having trouble revising. I think an outside set of eyes would be helpful. LLDMart (talk) 18:30, 25 August 2008 (UTC)[reply]

Hagfish

The hagfish is a very interesting suggestion. I assume you are suggesting it as an excellent example of the external production of mucus. Definitely worth adding. I've only begun to assess the best manor to present such information about mucus in animals that are not mammals. Mucus is also highly relevant in frog skin, for example. LLDMart (talk) 18:05, 28 August 2008 (UTC)[reply]

Discussion

Here is a discussion involving the grim edit war over List of battles by casualties. You might want to join. Wandalstouring (talk) 17:44, 12 September 2008 (UTC)[reply]

CO

Hi Jcwf,

I'm afraid I don't really understand the resonance structure of CO. I drew my picture from what I saw in a text book, however it was a very old text book, (80s). Are you saying that the other two structures should be different? Or just that they are not significant enough? I would be happy to redraw the diagram if you could show me other structures. If you think the other two are not significant enough then either remove it yourself or start a section on the CO talk page. Although I think even if they are very unstable and have a low chance of occurring practically but are still theoretically present then it is an interesting diagram, but maybe the explanation about them should be changed. -- Borb (talk) 13:39, 11 October 2008 (UTC)[reply]

Hi Borb,

A text book huh? Ouch..

The problem becomes visible if you add the remaining lone pairs. If you do the Lewis calculation you get:

ER (electrons required for octet rule)= 2*8 =16

VE (valence electrons available) = 4 (C) +6 (O) = 10, so total number of pairs = 10/2=5

The whole point of Lewis structures is to make up the difference by sharing electron pairs:

SE (shared electrons) =ER-VE= 16-10 = 6, so total shared pairs = 6/2 = 3

This means the number of lone pairs (LP) should be 5-3= 2

The only way you can do this is |C≡O|, because you need three bonds.

Yes you can write a structure like C=O but that would leave 3 lone pairs like |C=O>. If you now count the electrons surrounding C, there are only 6, not a full octet. The third 'resonance' is worse. It leaves C with only 4 electrons...

True resonance structures involve equivalent structures that each fulfill the octet rule. There is only one of those in this case.

(Of course, the whole Lewis story is primitive bunk compared to MO theory but that is a different matter) Jcwf (talk) 14:49, 11 October 2008 (UTC)[reply]

OK, so you really got me going on this. (Reason being that I teach CH101...) I went to the old books to see how people dealt with this story before MO theory. Moeller[1] says

A triple bond in [..CO..] was first suggested by Langmuir [..1919..] as more compatible with the properties [..] than a double bond. It is more probable however that the actual structure is a resonance hybrid involving the three structures [..your pic.. reference Linus Pauling (!!) The nature of the chemical Bond 1940..] ..

Although these structures are markedly different they are rendered about equally important because of the opposing effects of number of covalent bonds and charge separation.

...

The bond distance of 1.13A [..] indicates only that the triple bond arrangement is not incompatible [..lol..]

Linus, Linus... Tsk,tsk... The later application of MO theory has shown nothing but a triple bond and at least in this version of Pauling's story there is nothing about octet rules being violated....

What it all really shows is that Lewis theory was woefully inadequate to describe even simple molecules like CO anno 1940.

Unfortunately educationally Lewis and VSEPR are there to stay, simply because you can teach a freshman how to push a few electrons around but not how to do quantum mechanical calculation on his calculator.

That begs the question what should wiki do?

I think the best thing is to hang out the dirty laundry. And so your pic may well be useful, although it would be more useful if the lone pairs would be added. Then we could say that CO has baffled people for a long time, Langmuir proposed the triple bond structure and that it obeys octet but has an idiotic formal charge, that |C=O> looks more reasonable from a charge point of view but is not octet and that all these problems can only be resolved with MO theory. When written that way the story may actually help freshmen understand that Lewis and VSEPR are not the 'truth' but a quick and dirty model only. Unfortunately wiki often creates the opposite impression

1. Inorganic Chemistry an advanced textbook Therald Moeller, Wiley 1952

Jcwf (talk) 16:16, 11 October 2008 (UTC)[reply]

So I added the lone pairs to the png version. I have no clue about how to do svg.

CO

I also made a MO diagram for comparison, although it is not quite accurate: in CO the sigma 2p is actually higher in energy than the pi's

Jcwf (talk) 21:53, 11 October 2008 (UTC)[reply]

Jcwf (talk) 18:20, 11 October 2008 (UTC)[reply]

I've made an SVG version of the resonance structures with lone pairs. The database on commons is locked at the moment so I'll upload it later. Is it ok to use dots for the lone pairs instead of lines?

I agree I think the best thing is to say that CO has been confusing and MO theory has only recently shown the real structure (I assume it's quite recent). The resonance structures were what was thought, and taught, for a long time and proposed by Paulin etc. Wikipedia should definitely show what is correct (and can be cited of course) not what is taught in schools, but I think it is interesting to show what is taught in schools and why it is not quite right. -- Borb (talk) 13:39, 12 October 2008 (UTC)[reply]

CO

Uploaded now. -- Borb (talk) 18:30, 12 October 2008 (UTC)[reply]

I can redraw the MO diagram as SVG at some point, or you can try it yourself by downloading Inkscape from http://www.inkscape.org/ It's a really good program and produces compliant SVGs great for using on Wikipedia. It isn't great at drawing chemical symbols though, you have to kind of make them up. I don't know any chemical drawing app that will produce SVG. -- Borb (talk) 19:02, 12 October 2008 (UTC)[reply]

"Hiding images"

I assume that your comment on my talk page is in reference to Solar Energy Generating Systems. I share your disgust with the placement of a cleanup template on that article, as it detracted from the article for no good reason. However, the 3 tiny images in that gallery were not very satisfying, and after seeing that an extensive gallery of images (including those images and more) exists at Commons and is prominently linked in the article, I saw no particular purpose in keeping the miniature gallery.
This is not a matter of hiding the images, but rather of removing an article element that might prevent readers from finding a much better collection of images.--Orlady (talk) 23:24, 19 October 2008 (UTC)[reply]

Hey, please assume good faith. I am no fan of including collections of itty-bitty images in articles. In this case, Wikipedia Commons offered a much better image gallery than the article had. I'm pleased to see that you have revised the article to make the images into illustrations for the article, although it's not entirely clear to me how they illustrate points made in the text. (When images are used in an encyclopedia, they should be used to convey information and support content, not merely serve as eye candy.) Ideally, the article would be expanded... --Orlady (talk) 00:15, 20 October 2008 (UTC)[reply]

December 2008

Welcome to Wikipedia, and thank you for your contributions. One of the core policies of Wikipedia is that articles should always be written from a neutral point of view. A contribution you made to Political positions of Barack Obama appears to carry a non-neutral point of view, and your edit may have been changed or reverted to correct the problem. Please remember to observe our core policies. Thank you. Scjessey (talk) 18:09, 19 December 2008 (UTC)[reply]

You are quite wrong about my views, and I'll thank you not to leave personal attacks on my talk page. My motivation is entirely about Wikipedia policies and guidelines, and you are way out of line. -- Scjessey (talk) 00:57, 20 December 2008 (UTC)[reply]

Re: rechtszaak

You are right, I didn't read well. Sorry, my mistake. I restored your edit. Iblardi (talk) 12:20, 6 March 2009 (UTC)[reply]

Wortelnomina

I think the general term for nouns coined from verbs in English is verbal noun. Traditional grammar speaks of various types derived from Latin or Greek, like gerunds, gerundives, and infinitives. None of them are broken down into thematic versus athematic groups as far as I know; then again Latin hardly has athematic verbs. - Smerdis of Tlön (talk) 04:33, 15 March 2009 (UTC)[reply]

Hi

Hermaeus

Hi Jcwf. Commons rules are very strict, and I am afraid the other coin images do not conform easily. You can however use the attached image, which I took myself, and is therefore available. I have just transfered it to Commons. Cheers Phg (talk) 02:40, 24 April 2009 (UTC)[reply]

Cl2O7 hypervalency

How do you draw dichlorine heptoxide, Cl₂O₇, with all atoms written with simple octets, as suggested in your recent edit?

Like this?

Ben (talk) 23:04, 18 January 2010 (UTC)[reply]

Article request

Do you know Xhosa?

If so, would you mind creating the Xhosa article for xh:South African Airways?

Also it would be nice to have a Xhosa translation for the description of this image: File:SAA-Airways Park-002.jpg

Thanks, WhisperToMe (talk) 01:58, 8 February 2011 (UTC)[reply]

I am sorry but my Xhosa is very limited and gradually fading as I have not been in South Africa for a decade now. Jcwf (talk) 05:45, 8 February 2011 (UTC)[reply]

Do you know any Wikipedians who could further assist with the requests? WhisperToMe (talk) 09:32, 8 February 2011 (UTC)[reply]

Nope. I have been trying to get amaXhosa to come forth and write their intricate language for years, but to no avail. So i wish you a lot of luck, You'll need it. Jcwf (talk) 16:02, 8 February 2011 (UTC)[reply]

Trevor Manuel and racial conflict/public spat with Jimmy Manyi

Hi Jcwf, and thanks for your message!

I am going to ignore your comments on my prejudices and censorship, and rather stick to the subject at hand. You wrote on my talk page: "There are numerous South African sources from across the political spectrum, including e.g. Cosatu, that speak of racism".

I fully agree that this debate is about race and racism. When I changed the section heading from 'racial conflict' to 'public spat with Jimmy Manyi', this was an attempt at clarity. Essentially, I would agrue that 'racial conflict' connotes violence between different ethnic groups, which is slightly misleading. The debate is heated, but it is still a political debate within a democratic setting. Which is why I thought 'Public spat with Jimmy Manyi' would be more accurate. 'Public spat with Jimmy Manyi over race' or something to that effect would have been even better, except it is a bit too laborious for a headline. Perhaps I should have made my reasons clearer in the edit summary.

I don't know if you noticed, but I did write a bit on the discussion page. To recap: I feel the whole Manyi incident is definitely notable, but should perhaps be elaborated upon elsewhere on Wikipedia, rather than in the Trevor Manuel article. But please, have a look at what I wrote and give feedback! Cheers KongOlavKonfekt (talk) 13:53, 9 March 2011 (UTC)[reply]

Thanks for feedback! You are perfectly right in that racism is racism, and a serious problem whether accompanied by overt violence or not. What I am getting at is that the headline 'racial conflict', at least at a glance, suggests that Manuel and Manyi's clash is primordial; as if it is determined by their supposedly belonging to different racial groups. KongOlavKonfekt (talk) 19:24, 9 March 2011 (UTC)[reply]

Proposed Image Deletion

A deletion discussion has just been created at Category talk:Unclassified Chemical Structures, which may involve one or more orphaned chemical structures, that has you user name in the upload history. Please feel free to add your comments.  Ronhjones ^(Talk) 22:55, 10 June 2011 (UTC)[reply]

Thiospinels

Hello, Jcwf. You have new messages at Vsmith's talk page.
You can remove this notice at any time by removing the {{Talkback}} or {{Tb}} template.

It seems to me that you're confusing the Hermann–Mauguin notation and the space group notation. --Chris.urs-o (talk) 11:15, 24 June 2011 (UTC)[reply]

All files in category Unclassified Chemical Structures listed for deletion

One or more of the files that you uploaded or altered has been listed at Wikipedia:Files for deletion. Please see the discussion to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it/them not being deleted. Thank you.

Delivered by MessageDeliveryBot on behalf of MGA73 (talk) at 18:01, 28 November 2011 (UTC).[reply]

Talkback

Hello, Jcwf. You have new messages at Drmies's talk page.
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Drmies (talk) 21:34, 17 December 2011 (UTC)[reply]

Moving a page

Hi Jcwf. I just wanted to let you know that in order to retitle a page, content shouldn't simply be copied from one title to the other as you did with ionic bond/ionic bonding. This causes a break in the edit history of the article content. I have moved and combined the histories of the two titles, so nothing else needs to be done now, but for the future, Help:How to move a page gives details on the proper method. Regards, -- Ed (Edgar181) 18:47, 8 November 2013 (UTC)[reply]

ArbCom elections are now open!

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Not textbook

I noticed your recent work on non-stoichiometry. Here are some guidelines to consider WP:NOTTEXTBOOK and WP:NOTMANUAL. Most content-adding editors struggle with these guidelines, and I confess to no great insights other than your contribution might be crossing the line on them. In any case, good luck and happy editing. We always need editors in the Chemistry project. --Smokefoot (talk) 22:37, 6 June 2018 (UTC)[reply]

Fine Smokefoot. Please delete my terrible attempt to clarify a topic that as it stands now it is mostly a reflection of the bias of people who have been taught that everything is stoichiometric, even though it is not. Its quality is atrocious. But you can pride yourself in having scared off another editor of the Chemistry project. I'll go and write a better story in Afrikaans. Jcwf (talk) 22:49, 6 June 2018 (UTC)[reply]

What?--Smokefoot (talk) 22:52, 6 June 2018 (UTC)[reply]

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CS1 error on South African energy crisis

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