text:
User talk:Shaddack

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P-T Extinctions
In relation to your recent additions to Permian-Triassic extinction event, it may be useful to review Neutral point of view which explains how Wikipedia articles should be written on subjects which may be disputed. Overall you did a very good job with the hydrogen sulfide material, but it would be useful to identify which parts of the chain of events are likely to be disputed by other scientists. Also, the tone of your writing skews a little bit towards saying "this is the truth" rather than "this is new plausible idea that has not yet been adopted by the scientific community as a whole".

Of course, these issues can occur even in the writing of experienced editors, so don't feel bad, but it is important to think about the best way to frame the scientific debate without trying to unfairly take sides in issues that the scientific community has yet to resolve.

Dragons flight 09:54, Jun 12, 2005 (UTC)

 * Thanks :) I am new here, and not a native English speaker (hence some rather rough formulations). Also, my historical expertise is not too high, I just found this when doing research for another article and found this theory missing here. If you are more familiar with the criticism of this theory, please do the edits. --Shaddack 11:04, 12 Jun 2005 (UTC)

Hydride
Hi Shaddack, thanks a lot for your work in the chemistry articles, excellent work! Would you mind having a look at the first paragraph of hydride? The definition there is confusing and seem self-contradictory. Cheers, AxelBoldt 23:13, 13 Jun 2005 (UTC)

SEU
Thanks for your contribs to the SEU stub. I haven't worked in the field for over a decade, so I appreciate others coming in and touching things up and/or fleshing out details. John Elder 3 July 2005 18:29 (UTC)

Depletion region and depletion zone
It might be more appropriate to put the merged version of these articles under depletion region, as that's by far the version I've seen most commonly (ref: Sedra and Smith, "Microelectronic Circuits", or check random papers at IEEE Xplore). It's also the term used most at p-n junction (though both are used there). --Christopher Thomas 19:38, 12 July 2005 (UTC)

 * Done as requested. Good idea. --Shaddack 20:39, 13 July 2005 (UTC)

Edit summaries
Hi Shaddack, I have noticed that you put a lot of work in enhancing chemistry-related pages. It would be a great help for other users watching those pages if you could provide a short summary of your edits, e.g. something like "+ ". Keep on, Cacycle 21:55, 23 July 2005 (UTC)

Red links
Thank you for your message about red links. I won't delete any more. Pintele Yid 09:50, 26 July 2005 (UTC)

Combat Information Center
Thanks for adding the article on Combat Information Center. It's been on my to do list for a while. You might try digging for a photo to add to the article at www.navy.mil in the photos section. I'll add some to the article later, when I have more time. I was once an OS and worked in CIC. --Durin 14:44, 27 July 2005 (UTC)

:CueCat
Apologies... the one I got at RadioShack, the one which was mailed to me as a subscriber to Wired, and the one which was mailed to my wife for reasons that neither of us were able to determine all USB so I jumped to an inaccurate conclusion.

Pursuant to something or other in the licensing agreement, I forget what, I mailed one back to Digital Convergence with a polite demand that they pay for the cost of shipping it to them, and rather to my surprise they actually mailed me a check for the about-$2 shipping cost... Dpbsmith (talk) 19:34, 16 October 2005 (UTC)

CIC/NTDS images
Images a great. You tagged and sourced them properly. Nice work! For CIC, you might want to find a more current image of a CIC, not to replace the image that is on the article but to include a photo from 30 years on. There are many differences, and many similarities, as I suspect you know :) --Durin 15:14, 17 October 2005 (UTC)

Admin Nomination
You have been nominated for a admin position.

Please visit Requests_for_adminship/Shaddack to indicate whether you choose to accept. Ian13 19:35, 30 October 2005 (UTC)

Kraft vs. kraft
Shaddack, Thanks for adding a bit to the Kraft process article. I learnt a bit about this when I was working on sodium sulfate, but I wanted your opinion- should it be kraft or Kraft? I have seen both in the literature, do you have any idea which is the "correct" name? Thanks, Walkerma 04:29, 1 November 2005 (UTC)

 * I saw both versions as well. I do not have a solid opinion about this, nor I think it really matters at the end. I added a mention of this issue to the name paragraph of the article. Is it good enough to resolve or at least postpone the issue?

--Shaddack 05:20, 1 November 2005 (UTC)

That looks good now, thanks. Walkerma 20:39, 3 November 2005 (UTC)

Retene
That's a good picture you made for the retene article. -- Kjkolb 05:32, 6 November 2005 (UTC)

 * Thanks! If you want any other structure, let me know and I'll make it. --Shaddack 01:59, 10 November 2005 (UTC)

ethylene dichloride
Hi Shaddack, just to inform you: ethylene dichloride is always '1,2-dichloroethane. The 1,1-dichloroethane would be called ethylidene dichloride. As you were editing ethylene and not ethene, the use of the (in itself correct) systematic name could be considered inconsistent. Your choice. Wim van Dorst 11:10, 9 November 2005 (UTC).

 * Objection addressed, change deployed. Trivial name used as a link, systematic name mentioned in a bracket. Ethylene dichloride article amended with a link to ethylidene dichloride, with a mention it is a 1,1-dichloroethane. This should help non-native English speakers to cope better with English chem terminology. --Shaddack 02:01, 10 November 2005 (UTC)

 * Good work, shaddack. Considering your interest and active contributions to chemical compound pages, perhaps you'd care to participate in the Chemicals wikiproject? We're working on getting a now fairly stable worklist to a higher standard (A-Class). That's where acetic acid, now up as featured article candidate (please support) also comes from. I'll pose a question there about the naming of these ethane derived articles, btw. Wim van Dorst 08:41, 10 November 2005 (UTC).

Your RFA
Hi! As you know, your RFA bid did not receive the required level of support and as a result I had to fail it. This does not mean that you cannot be an admin, you can try again later and see what went wrong in this RFA. Regards, =Nichalp   «Talk»=  18:53, 9 November 2005 (UTC)

Relative Time
Hi,

I just thought I'd let you know that timezones are customizable on WIKIPEDIA, so when you quote a time, it doesn't necessarily mean anything... It might be better to refer to username or IP address instead of time... For example, this is how your revision line looked in my browser...

22:45, 15 November 2005 Shaddack (Rvv to version as of 00:09, 16 November 2005)

Which is to say "On November 15th at 10:45pm, I reverted the version to the one created on November 16th at 12:09am)

Because I have my timezone set to something other than yours, it just doesn't jive.

Thought you might like to know :O)

RickyWiki

P.S. I'm not an expert at time so if I'm wrong and just misunderstood your comment, please forgive me. I can't balance my chequebook either.

 * Argh. Good comment. However this may be a slight problem, as I date the reverts via a greasemonkey script that takes the date/time from the page, and there is no info about the editor name on the old-version-edit page. I think there is a solution, but let me think of it for a while... --Shaddack 05:11, 16 November 2005 (UTC)

 * Do you know the monkey who wrote the script? It would be enough to just have it append the editor's timezone to give a recourse for someone really wanting to figure out the stamp... just as in your paragraph above... :O)

 * Good idea. (Yes, I know that monkey pretty intimately, it's me.) Done so. Passing the version author name from history page to edit page still remains on my pending tasks list. --Shaddack 17:56, 22 November 2005 (UTC)

Acrylamide
Shaddack, I would be very grateful if you could please give an intelligent, rational and mature justification for reverting this page back to its old version. Please address the points I have mentioned in the Talk page. As you know, Wikipedia is freely editable so you do have to accept having improvements made to pages you may have written. Please put your rely on the Talk:Acrylamide Talk page. Thanks very much. Droid.

 * As per page history, I did not do any revert you seem to be complaining about. Please check the differences between the versions and see what I mean, as per talk page. --Shaddack 13:48, 20 November 2005 (UTC)

Ion implantation
I don't believe this falls under the category of thin film deposition, so I'm removing the category marker. If you disagree, feel free to leave a note on my talk page.--Joel 17:21, 20 November 2005 (UTC)

Terpenes
Hi Shaddack. I've noticed that you've added a couple of terpenes. I've been doing the same, in preparation for writing a much more complete article for terpene. I'll hopefully get to it soon. Perhaps this weekend. If you have any suggestions, please let me know. Edgar181 00:34, 24 November 2005 (UTC)

SiC, MoSi2
Do these really have a highly nonlinear PTC response? I thought that SiC, as a traditional semiconductor, was NTC. Only the titanates were mentioned in the class I took, but please correct me if I'm wrong. I'm also surprised to see SiC listed as a commercial heating element, and especially MoSi2: aren't these reserved for scientific/industrial furnaces?--Joel 05:38, 3 December 2005 (UTC)
 * Good question. Greenwood-Earnshaw: Chemistry of Elements specifies SiC as PTC, at least in my translation, however I won't bet my neck on it. --Shaddack 06:01, 3 December 2005 (UTC)

Corrosion in arc welding
Hi Shaddack, thanks for your contribution to arc welding. I have a few welding books but I couldn't find the information you added in any of them, so I thought I'd ask to see where you got it. References are really important, because at some point I'd like to make this article featured, and when that happens, all the parts of the article will need to be referenced. So if you could tell me the publication information of the book (as well as the page numbers) from which you got the information, that would be great, or you could add it yourself to the references section of the article. Thanks! --Spangineeres (háblame)  16:23, 3 December 2005 (UTC)

 * Sensitivization of stainless steels: William Callister, Material science and engineering, page 569-571. Hydrogen embrittlement, I loaned out that book; I remember that electrodes for welding of stainless steels have to be moisture-proof packed, and have to be kept dry at all cases because of they otherwise tend to release hydrogen. I added some URLs referencing these. --Shaddack 16:59, 3 December 2005 (UTC)

pitting corrosion
I saw your additions to the article and it seems very good! Thanks, Sammo 21:07, 10 December 2005 (UTC)

Isotope geochemistry
Now that was weird. I made a couple of links to Isotope geochemistry and was looking at the article thinking about shifting the superscripts where they belonged. Wham - my browser crashed! And when I get back to the article they've shifted - magic! Thanks for reading my mind :-) Seems there's quite a bit more to do there ... always more to do. Vsmith 05:18, 18 December 2005 (UTC)

Yikes! I18N failures
You are correct! I have been using a Java tool called WikiLink (that web site is down at the moment) to do some category renames where I need to do bulk updates. It works on almost everything else, but I will investigate. -- Fplay 17:19, 20 December 2005 (UTC)

Orphaned category
Hi there. I've been going through Special:Uncategorizedcategories, and I noticed you recently removed the category Palm oil from all of its parent categories, leaving it an orphan. In the future, can you please nominate unneded categories for deletion at Categories for deletion or request that they be speedy deleted using the {{db}} template, whichever is appropriate? Thanks, SCZenz 03:53, 23 December 2005 (UTC)

 * Thanks, should do that next time. --Shaddack 03:55, 23 December 2005 (UTC)
 * Cool, thanks. This time, I went ahead and deleted it. ;-) -- SCZenz 03:57, 23 December 2005 (UTC)

Image:Photo-Polyswitch.jpg
Thank you for providing images to the commons. Please keep in mind that images and other files on the commons must be under a free license... (rest of image tagging request commented out for brevity) ... Thank you. -- gildemax 16:53, 24 December 2005 (UTC) --

 * Corrected. Please check. Any more outstanding problems? --Shaddack 18:03, 24 December 2005 (UTC)

 * Every thing is fine. Thanks a lot. gildemax 20:59, 28 December 2005 (UTC)

dirty dozen
Hi Shaddack,

recently you drew structures of Aldrin, Dieldrin and other chemicals that belong to the "dirty dozen" of the Stockholm Convention. They are fine and I use them in Aldrin, Dieldrin, and Heptachlor. May I ask you to draw also the structures of Chlordan (1,2,4,5,6,7,8,8-Octachlor-3a,4,7,7a-tetrahydro-4,7-methano-indan), which has just one chlorine more than Heptachlor (1,4,5,6,7,8,8-Heptachlor-3a,4,7,7a-tetrahydro-4,7-methanoinden)? Dieldrin (1,2,3,4,10,10-Hexachlor-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-5,8-exo-dimethanonaphthalin) has got a stereoisomer called Endrin (1,2,3,4,10,10-Hexachlor-6,7-epoxy-1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-5,8-endo-dimethanonaphthalin). Could you also draw that?

Thanks anyhow, de:User:Blech

 * Chlordane and endrin are drawn and uploaded to Commons. Article for endrin was written as it was missing. Please check if everything is correct? --Shaddack 21:48, 2 January 2006 (UTC)

 * Chlordane is correct, I am sure. Endrin and Dieldrin do have a slightly different spatial orientation than here . I would say they are o.k., but stereo chemistry is not a strong side of mine. Thanks a lot, de:User:Blech 21:57, 3 January 2006 (UTC)

 * Redid the formulas of aldrin, endrin, and dieldrin, to have better conformation. --Shaddack 09:05, 4 January 2006 (UTC)

Pesticides
Hi, I started a few pages on insecticides recently. Do you want to draw the strucutres or would you like me to. Also do you think we should make a large single article on OP insectcides or do you think we should make lots of smaller articles on each OP ? Cadmium 21:06, 7 January 2006 (UTC)

 * Please let me know the list of the pages in need of a formula? Regarding OPs, I am in favor of a hybrid approach: a comparison page about the entire family and a quick comparison table, and detailed articles about each member. That way we can be detailed enough when needed, and at the same moment have a brief walkthrough of all of them in a single place. --Shaddack 23:01, 7 January 2006 (UTC)

I have made a start on the main page, I have included an example of a class of substances which were worked on by a german chemical company (either BASF or Bayer).Cadmium 16:06, 8 January 2006 (UTC)

VEIL - pointer to more detailed specifications?
Message to Shaddack, Response requested:

I have been communicating with Danny O'Brien at EFF about a hoped-for talk with the staff of Senator Gordon Smith, who will be sheparding HR4569 aka "The Digital Transition Content Security Act of 2005" xxxx2006 through committee. I am also hoping to talk to technical managers at local companies Tektronix and Grass Valley Group to see if I can get them to communicate their concerns to the Senator.

I have designed video analog to digital converter chips, and have 3 patents on the subject (Mea culpa!). Ultra high speed data converters are difficult enough to design and manufacture as it is - this bill will be the equivalent of requiring aircraft carrier decks for speedboats. Right now, I am attempting to do a paper design to estimate just how big the addition might be to a general purpose high speed digitizer.

You did a nice writeup on VEIL for Wikipedia, but your article, and the references it points to, do not mention signalling levels (in IRE luminance, or in volts, or ...) for the VEIL signal, nor is the Rights Assertion Mark format discussed. While I imagine you would have included that information if you had it, perhaps you can point me at a source of detailed specifications for this technology, and I can interpret it at the implementation level.

Keith Lofstrom  keithl at keithl dot com   Beaverton, Oregon

 * Response issued via email. My hat off re the patents. --Shaddack 23:02, 7 January 2006 (UTC)

Science articles
Excellent work on the science articles, Shaddack. :-) Kjkolb 10:38, 9 January 2006 (UTC)

Stub templates on virus articles
Hi, you created some good stubs on various viruses. Please be aware in future that there is a more specific template, Virus-stub which is more relevant for those articles than med-stub. There is a list of all the approved stub templates at Stub types. Thanks! Mushintalk 16:45, 12 January 2006 (UTC)

Re Category:Anonymity networks
Excellent work. A lot of the anonymity-related articles were really badly categorized before, but your new articles seem well thought out, thanks. Haakon 22:31, 13 January 2006 (UTC)

Track (CD)
Hi Shaddack, looks like you were mid-sentence editing Track (CD) and forgot about it... interested in finishing it? Also, I have done a lot in the related articles, including a lot of merging. —Quarl (talk) 2006-01-15 12:18Z

Structure of Pentazole
Hi Shaddack,

Just to draw your attention to the chemical structure of Pentazole which you've added to the article on that topic - it looks like you've inadvertently uploaded the structure of pyrrole instead. Pentazole is a five-membered ring containing only nitrogen atoms (HN5 as the neutral species, if such a thing exists), while pyrrole contains four carbons and a nitrogen (C4H5N). -- Gustavus 17:29, 19 January 2006 (UTC)

 * OUCH! Corrected. --Shaddack 18:04, 19 January 2006 (UTC)

carotenoids
I'm new here, but I think you made an alteration to make this statement about carotenoids:

"The double carbon-carbon bonds interact with each other in a process called conjugation. As the number of double bonds increases, the wavelength of the absorbed light increases, giving the compound an increasingly red appearance."

I think, however, that it is inaccurate. As wavelength absorbed increases, a redshift in absorbtion, how can the compound have an increasingly red appearance? It seems like it should say increasingly blue appearance. Brianf711 19:10, 20 February 2006 (UTC)

 * I don't think I was the one who made the changes, on carotenoids the revision history related is this. Regarding the formulation itself, I am not really certain, it is too late here now. --Shaddack 05:54, 21 February 2006 (UTC)

Drawing organic compounds
Hi there. I notice that you have uploaded several organic structures, and wondered what software you use - as I would like to do the same. Cheers. Jeff Knaggs 16:02, 18 March 2006 (UTC)

 * (Sorry for late answer.) I essentially copied the setting of Cacycle, with some minor tweaks (copy/paste to IrfanView, then automated scaling down to 50% and conversion to PNG using netpbm utilities). --Shaddack 05:10, 23 April 2006 (UTC)

Wikics template
Hi Shaddack! Recently, I created a new template to indicate English Wikipedia users who also contribute to the Czech Wikipedia.

Template:User wikics

Feel free to add it to your userboxes if you like it (and if you actually contribute). Happy Easter. Daniel Šebesta (talk • contribs) 22:35, 14 April 2006 (UTC)

 * Thanks for letting me know! I contribute to the CZ one less than rarely, though. My ambitions are somewhat more global. Will keep this in mind in case my conditions change. --Shaddack 05:10, 23 April 2006 (UTC)

Wow!
Holy crap! Where did you find the information for all those compounds in article phosphor?!! really great, thanks! Perhaps you can verify/correct my guesses at the spectrum of the origin of the peaks in light from fluorescent tubes?--Deglr6328 18:41, 22 April 2006 (UTC)

 * I took them from various manufacturers' webpages, and from an electrical engineer reference book. No clue if the spectrum is correct, but it looks plausible. We should write down how phosphors work on the atomic/lattice level... --Shaddack 05:10, 23 April 2006 (UTC)

Thanks for adding the links to the Sago mine story.
For a while, it seemed like I was working on it alone!--Beth Wellington 05:04, 28 April 2006 (UTC)

Category:Cellulose
Hi there. I have nominated Category:Cellulose derivates for renaming as Category:Cellulose. Feel free to comment here if you are interested. I'm contacting you because you created the original category. Mike Dillon 02:20, 2 May 2006 (UTC)

 * Do whatever you think is the best. The name of the category is not critical - the grouping of related things together is more interesting than nomenclature details of the group. Alternately, describing the category as "Cellulose, its forms and its derivates" could make things cleaner. --Shaddack 19:47, 2 May 2006 (UTC)

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MOOOOOOOO
Moo 194.247.232.131 02:03, 4 August 2006 (UTC)

Please help
Hello im 13 and i have a science project on glycerol. On this website i cant understand most of the words used in the artical. i have to do a three minute speech on something i dont understand. could you please send me some information i can undertand. my email address is pantera_boi@hotmail.com If you did this for me i would be really greatfull thankyou

-Liam

Hello Again. I created another baby stub for the article Decyl glucoside.
Feel free to jump into the action with the stubby decyl glucoside article. Good Luck. If you like I can create about another 100 or so articles! Decyl Glucoside 19:55, 2 October 2006 (UTC)

eBooks
What is a good website for eBooks? 212.1.145.249 00:43, 2 October 2006 (UTC)

Image:Neutral red.png
The structure you drew for this compound seems to have a missing chloride ion. See here. Jeekc 05:29, 4 October 2006 (UTC)

 * I am aware of it. The chloride was considered unimportant, as it contributes only minimally to the chemical behavior and not at all to the color. The chemical can be quite as well a sulfate or acetate or any other suitable salt with just minimal difference of its properties, therefore I chose to omit the anion. --Shaddack 09:40, 4 October 2006 (UTC)

New Photo Matching Service
Hi there,

I'm contacting you because you listed yourself at Wikipedians/Photographers. You might be interested in a new wikiproject page that lists photographers and articles that need photos by location. The page is located at Photo Matching Service or WP:PMS GabrielF 00:40, 1 December 2006 (UTC)

thanX for gliotoxin
I came to thank you for editing GLIOTOXIN, but now I admire your contribution to chemistry AbuAmir 19:16, 11 January 2007 (UTC)

Image:Myreth sulfate.gif listed for deletion
An image or media file that you uploaded or altered, Image:Myreth sulfate.gif, has been listed at. Please look there 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 not being deleted. Thank you. —Bkell (talk) 00:49, 21 March 2007 (UTC)

Image:1(5-tetrazolyl)-4-guanyl tetrazene hydrate.png
Hi Shaddack. Could you please check if this structure is correct? It is used in the article tetrazene (CAS: 31330-63-9), where this PubChem link is given. Possibly it's used in this article in error. Thanks in advance. --Leyo 17:18, 3 April 2007 (UTC)
 * Maybe, I was not clear enough. Your structure is not the same as in PubChem or in ChemFinder for the CAS 31330-63-9, but it is used in the same box as this CAS. Could you check that please? Thanks. --Leyo 23:07, 17 April 2007 (UTC)

 * I see the issue now, thanks for pointing me at it. It appears I made a serious screwup. The new corrected structure is uploaded and the SMILES string is corrected. You're welcome, and thanks for catching my mistake! --Shaddack 06:40, 18 April 2007 (UTC)
 * I don't see any difference in the newly uploaded structure compared to the old one. I don't know if this is a problem of the server. --Leyo 12:02, 18 April 2007 (UTC)
 * The structures differ in position of a nitrogen in the chain and a hydrogen atom in the pentacycle. Check if the old image is not cached somewhere along the way. It works for me. --Shaddack 18:27, 18 April 2007 (UTC)
 * Indeed, the cache was the problem. Yes, the structure is correct now. Thanks a lot. --Leyo 19:16, 18 April 2007 (UTC)

do you know if the ion exchange resin can act as a catalyst to isomerize c-16 or c-18 olefins?

Solvent over-enthusiasm?
Hi there. My guess is that others chem editors are wondering the same thing: I am a little surprised by your categorizing a lot of compounds as solvents. Now in principle, virtually anything is a a solvent (I have used molten NaCl, for example). So I am kind of wondering where you might be going with your new-found enthusiasm for solvents. There is probably a tacit understanding that this category would be reserved for common solvents in the lab or industry. Triethylenetetramine???? A proposed set of changes that affect many compounds would be usefully disclosed and discussed at Wikipedia talk:WikiProject Chemicals. Thanks.--Smokefoot 02:57, 11 November 2007 (UTC)

 * Well, the mentioned TETA was originally in an article together with DETA which I made. DETA is AFAIK used for extractions in oil industry. However during the splitting the categories were kept. Now I was splitting the solvents by chemical structure, and the cat sorta stuck there. Sorry, correcting. --Shaddack 08:07, 11 November 2007 (UTC)

:)
.. da man :) chini 76.167.227.13 (talk) 23:30, 17 February 2008 (UTC)

AfD nomination of Cocamide TEA
An article that you have been involved in editing, Cocamide TEA, has been listed for deletion. If you are interested in the deletion discussion, please participate by adding your comments at Articles for deletion/Cocamide TEA. Thank you. Do you want to opt out of receiving this notice? Iain99Balderdash and piffle 11:51, 22 May 2008 (UTC)

 * Not contested, based on the AfD reviews. Too late to contest anyway. --Shaddack (talk) 18:23, 25 May 2008 (UTC)

Category:Food antioxidants
Hi there -- I just removed Category:Food antioxidants from Category:Nutrients. You didn't really mean to put it there, did you? It caught my eye because of Category:Dietary antioxidants -- which you also, properly, placed there, on the same day. I'm guessing that this was merely an inadvertent mistake. Anyhow, I don't think preservatives should ever come under the heading of "nutrients". Hopefully, we are in agreement on that! Regards, Cgingold (talk) 13:52, 26 May 2008 (UTC)

 * Well done. Including keeping the link to the other category in the top of the page. This is how wiki should work. Thanks for correction. --Shaddack (talk) 10:47, 1 June 2008 (UTC)

Typo redirect Pelagir
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Permission to reproduce
Dear Shaddack,

in our new schoolbook we would like to reproduce a photo from you. It is "Microphoto-butterflywing2". We need your permission for the use of the image. Please contact me for the details. Thank you and

kind regards Christin Sperling

christin.sperling@westermann.de —Preceding unsigned comment added by 81.209.187.118 (talk) 11:46, 20 June 2008 (UTC)

WikiProject Explosives
Hello, WikiProject Explosives has been launched. Feel free to sign up as a member and provide input in reference to priorities for improvement of Wikipedia's explosives-related articles. Thanks, EVCM (talk) 18:53, 28 August 2008 (UTC)

PFOS
I thought you would enjoy seeing the PFOS page now considering your discussions on the talk page. I have put in most of my time at the PFOA page, however. Thanks. -Shootbamboo (talk) 05:05, 2 November 2008 (UTC)

Fluorescent Dyes
Hi Shaddack,

I came across a few of your articles on Fluorescernt dyes. I have a product I'm working on that will require that I can apply a fluorescent dye to Cyanoacrylate (super glue), so that when combined, the two materials will be able to polymerize at the same time when heated into a fume. This combined material will be impregnated into steel wool pellets and then heated in a special torch until it fumes. The fumes will then be used to "lift" latent prints, that can then be examined under polarized light. We have not been able to find an existing dye that would be compatible with cynoacrylate. Can you help?

Arnold Schwartz68.199.9.104 (talk) 19:54, 11 December 2008 (UTC) a.schwartz@porta-lab.com

50 Cent Party
Hi Shaddack! I made some comments at the article talk page and edited Web brigades also. You are very welcome to contribute. But one has to be very careful with such materials, as one can see here. You might also look at this recent debate. Thanks. Biophys (talk) 22:15, 11 January 2009 (UTC)
 * Note that my last edit in Web brigades was reverted exactly in three minutes  and note who made this revert.Biophys (talk) 22:20, 11 January 2009 (UTC)

Question regarding your wiki edit on graphite
On the Graphite entry you made an edit stating that the use of graphite is limited by its tendancy to cause pitting corrosion in stainless steel. I am working on a project to use a graphite lubricant on ferritic stainless steel so naturally this comment concerns me. I've done some brief internet research and cannot find any other evidence to support this statement. Can you please some background on why you think this is the case?

Thanks —Preceding unsigned comment added by 12.152.193.133 (talk) 20:20, 22 January 2009 (UTC)

 * Brief search done. Sources added. Good enough or want better? --Shaddack (talk) 21:23, 22 January 2009 (UTC)

Crystal oscillator
I noticed you added the table in the Crystal oscillator page. I was wondering if you could add 33.33 MHz and 40 MHz since they are mentioned as common in the article but they are not on the list. what are they even for? 06:51, 3 March 2009 (UTC)
 * Are you going to put in all 400 frequencies in the Digi Key catalog? I don't think we need every frequency ever made listed in the article, especially while it lacks discussion of temperature coefficients, the history of the various crystal cutss, uses in radio, and many other facts more suitable to an encyclopedia than a parts catalog. Please don't add more frequencies, the user gets the idea after the first 30 or 40. --Wtshymanski (talk) 15:10, 23 December 2009 (UTC)
 * Some of the 400 are fairly unimportant, and some are custom-made for specific and minor application. I would however suggest to split off the table into a separate article. --Shaddack (talk) 18:44, 23 December 2009 (UTC)

Metastable intermolecular composite
Hi Shaddack — I'd suggest to move Metastable intermolecular composite to Nano-thermite. The article, as of this moment, is about metallic nano-scale energetic materials, which are not necessarily intermolecular (in fact, the Al is not a molecule). They differ from most high explosives by being a mixture of two (or more) substances, but this is not sufficient to define them. We could of course have another article about the larger class of metastable intermolecular composites. What do you think about a possible move? — Regards. Cs32en 21:47, 4 May 2009 (UTC)

 * I don't really care under which title the substances are. Let's go for nanothermites, MIC as a redirect to them for now, and if you please could, write (or get somebody else to write) more about both nanothermites and MICs. --Shaddack (talk) 21:48, 8 May 2009 (UTC)

Phosphors
Hi Shaddack, you left me a message on phosphors in my talk page. I left a reply there, but I don't know how to notify you of the answer, so once you read this, just delete the message :) REGARDS! Alchaemist (talk) 05:32, 18 June 2009 (UTC)

CfD nomination of Category:Soldering
I have nominated soldering for renaming to brazing and soldering. Your opinions on the matter are welcome; please participate in the discussion by adding your comments at the discussion page. Thank you. Wizard191 (talk) 17:57, 24 July 2009 (UTC)

goretext photo
Hi, I've tagged image that you originally uploaded in 2005 as missing source information, because the commons version now links to local version and local version no longer exists, so it's hard to find out whether it actually is GFDL. Can you please specify the source on the Commons page, if possible? Thanks --che (cs:talk) 21:01, 4 August 2009 (UTC)

 * I honestly have no idea. I think I took it from another wikipedia (German? Or so?) but I may be wrong. --Shaddack (talk) 00:19, 9 August 2009 (UTC)

NowCommons: File:CIC-USS-CarlVinson-2001.jpg
File:CIC-USS-CarlVinson-2001.jpg is now available on Wikimedia Commons as Commons:File:CIC-USS-CarlVinson-2001.jpg. This is a repository of free media that can be used on all Wikimedia wikis. The image will be deleted from Wikipedia, but this doesn't mean it can't be used anymore. You can embed an image uploaded to Commons like you would an image uploaded to Wikipedia, in this case:. Note that this is an automated message to inform you about the move. This bot did not copy the image itself. --Erwin85Bot (talk) 04:42, 4 September 2009 (UTC)

Crystal oscillator and crystal cuts
Thanks so much for the material on crystal cuts. I think this makes the article much broader and more useful, since that whole area had been neglected up to your addition. I think Wikipedia articles are more encyclopediac when they give a broad view of a topic, rather than extensively listing minor variations. --Wtshymanski (talk) 03:47, 28 December 2009 (UTC)

Plutonium
is a featured article meaning any indiscriminate dumping there of unreferenced information (or referenced to unreliable sources) may be reverted on the spot. Materialscientist (talk) 23:39, 24 January 2010 (UTC)
 * I have commented out the Pu-U-xxx alloys in the text because I couldn't quickly find the references for that part and thought you can do that much quicker. Materialscientist (talk) 05:30, 27 January 2010 (UTC)

Pit (nuclear weapon)
I saw the Pit (nuclear weapon) article you started. Very interesting and nicely done! I have read a lot about the Manhattan Project, but this has technical stuff I had never run across before. CosineKitty (talk) 16:01, 11 February 2010 (UTC)

Chernobyl disaster edits
Wow, impressive work on the Chernobyl disaster. I read and re-read the page every year or so. Would you mind clarifying this part for me?

"The role of the graphite section, known as "displacer", is to augment the difference between the neutron flux attenuation with inserted and retracted rods, as the graphite displaces water that would otherwise act as neutron absorber, although way weaker than boron carbide. When the control rod is fully retracted, the graphite displacer is located in the middle of the core height, with 1.25 meters of water at its each end."

I know that this graphite displacer is one of the primary causes of the meltdown and why but I do not understand that part of the paragraph, which attempts to explain why it was there in the first place. So can you re-explain why the designers put it in? Isn't graphite a neutron moderator? Why was a piece of graphite which increases reaction rate used on a control rod, the purpose of which is to decrease reaction rates? Thanks!

-- Lev

 * I saw your question in passing,and thought I would answer it. First, any neutron modifier is also a neutron poison, and vice versa.  Graphite absorbs neutrons as well as moderating them; it simply absorbs fewer than does water.  So a graphite "extension" to a control rod essentially amplifies the reactivity of the rod, meaning you need fewer (or smaller) rods to control the pile -- as you extract the rod, you replace a very strong neutron poison (B4C), with a good moderator (carbon).  Without the shim, you're replacing the rod with the cooling water around it.   Of course, if the shim is too short (as it was in pre-Chernobyl RBMK designs), your initial insert of a rod winds up briefly increasing reactivity, rather than decreasing it.

Regards. Fell Gleaming ( talk ) 05:29, 19 April 2010 (UTC)

Butterfly wing photos
Hi, I am very interested in learning about how you made the microphotos of butterfly wings. In particular, what kind of microscope and camera were you using? If you are able to assist, I'd love some pointers as to how to create a similar set up for myself.

Thanks, thomson.tribe.studio@earthlink.net —Preceding unsigned comment added by 75.22.73.34 (talk) 01:22, 9 March 2010 (UTC)

lock decoder picture..
Hi, I am a locksmith and safe engineer based in the UK. I saw your lock decoder picture, interesting, is this your tool?

best regards, St.john

stjohn@technicalentry.com —Preceding unsigned comment added by Stjohngoldfinger4 (talk • contribs) 23:52, 31 March 2010 (UTC)

Trinitite
Where can I get a specimen of Trinitite like the one in the picture you posted to Wiki? - Thanks...Brent Van ALlen —Preceding unsigned comment added by 71.231.188.34 (talk) 15:54, 3 April 2010 (UTC)

 * I got mine from eBay. Was a lucky find. http://www.unitednuclear.com/ is selling some too. --Shaddack (talk) 05:31, 19 April 2010 (UTC)

Deaths due to the Chernobyl disaster
Hi, it is improper to move a page against consensus. If you wish to move this entry, please start a movereq process and obtain consensus. I can explain the process to you if you wish. Fell Gleaming ( talk ) 05:01, 19 April 2010 (UTC)

 * Well, you split off the section, renamed it according to your own idea, and now are insisting on changing the scope of what was essentially my work. Why involving bureaucracy when the problem is clear? The table has a wider scope than just the dead, see its talk page and the header of the section in the article it was in originally. I agree with moving it to a separate page, but I want the original scope preserved. --Shaddack (talk) 05:28, 19 April 2010 (UTC)

Heat-shrink tubing
You have been mentioned in a discussion at Talk:Heat-shrink tubing.  Sp in ni ng  Spark  08:52, 16 May 2010 (UTC)
 * Thanks :) Looks like no good work can go unpunished. :P --Shaddack (talk) 13:51, 16 May 2010 (UTC)

Brazing
Nice work. I'm learning to braze right now, and hopefully I'll become good enough to need all that info. Keep it up. - Peregrine Fisher (talk) 03:03, 18 June 2010 (UTC)

 * You're welcome :) Some additions written. --Shaddack (talk) 15:43, 22 June 2010 (UTC)

Hello! One of your edits to Brazing introduced a ref name of "lmsilv" (on the table item "Premabraze 631") but did not add a ref with that name. Could you please add in the source you had intended? Thanks. - Salamurai (talk) 02:45, 22 June 2010 (UTC)
 * Oops. Corrected! --Shaddack (talk) 15:43, 22 June 2010 (UTC)

You are now a Reviewer
Hello. Your account has been granted the "reviewer" userright, allowing you to review other users' edits on certain flagged pages. Pending changes, also known as flagged protection, is currently undergoing a two-month trial scheduled to end 15 August 2010.

Reviewers can review edits made by users who are not autoconfirmed to articles placed under pending changes. Pending changes is applied to only a small number of articles, similarly to how semi-protection is applied but in a more controlled way for the trial. The list of articles with pending changes awaiting review is located at Special:OldReviewedPages.

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Green diesel
Hi, Shaddack. There is a discussion to merge Green diesel article with Vegetable oil refining and/or Biomass to liquid articles. As one of the main editors of the biomass to liquid article, your input is highly appreciated. Beagel (talk) 09:24, 28 August 2010 (UTC)

Mercury arc valves
You may want to comment here: Talk:Mercury arc valve. -- Petri Krohn (talk) 07:20, 4 September 2010 (UTC)
 * Thanks! What's a good enough reference when Alfven's own words quoted by NASA aren't sufficient? --Shaddack (talk) 20:01, 4 September 2010 (UTC)

Chemical Applications
Hi Shaddack - thanks for all of your contributions. I'm a chemist myself and you inspire me. I'm just wondering how you know the applications for thiodiglycol (and other chemicals). How did you learn about, for example, that it is used in pesticides in the first place?

Thanks for your help Clearchemistry (talk) 21:57, 11 September 2010 (UTC)Clearchemistry

Categories for discussion nomination of Category:Metal plating
Category:Metal plating, which you created, has been nominated for deletion, merging, or renaming. If you would like to participate in the discussion, you are invited to add your comments at the category's entry on the Categories for discussion page. Thank you. Wizard191 (talk) 12:26, 5 October 2010 (UTC)

File:Choline.gif
Hey there Shaddack

I deleted this image you uploaded, because it was interfering with the chembox on choline. I know I'm being a little bold, but the image was unused, and it was made to 2005 standards. Since then, other contributors have uploaded equivalent images which meet current standards.

Nevertheless, I wanted to ask if you wanted me to re-upload your image anywhere. Thanks. --Rifleman 82 (talk) 06:05, 30 October 2010 (UTC)

Snad bys mohl pomoci
Zdravím,

na den výročí americké dospělosti naší "Velvet revolution" jsem o tobě (snad nevadí, že tykám) viděl dokument. A velmi mě zaujalo to co děláš a co dokážeš. Potřeboval bych s něčím pomoci. Nechci o tom psát, neboť "Big brother is watching you". Nevím jak by to šlo udělat jinak. V případě, že bys mi chtěl poradit, aniž bys tušil o co jde, tak se prosím tě ozvi na můj mail. Určitě znáš bezpečnější způsob jak mě kontaktovat. Předem díky a kdyby nic tak hodně štěstí, síly a entuziasmu.

S pozdravem lama maar-thind@seznam.cz —Preceding unsigned comment added by 188.175.33.91 (talk) 21:15, 18 November 2010 (UTC)

Autopatrolled
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Nomination of Hot particle for deletion
A discussion is taking place as to whether the article Hot particle is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

The article will be discussed at Articles for deletion/Hot particle until a consensus is reached, and anyone is welcome to contribute to the discussion. The nomination will explain the policies and guidelines which are of concern. The discussion focuses on good quality evidence, and our policies and guidelines.

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Custodial Detention Index
nice work Decora (talk) 20:03, 23 April 2011 (UTC)

Cerimetry
Hi Shaddack, good job for the chemistry articles! Would you mind taking a look at the very first article I just have created on Cerimetry? It is still a temporary subpage (not published yet); I've just created the page today. Your contribution would be appreciated. Thanks a lot in advance, Burgundy111 —Preceding undated comment added 23:27, 6 May 2011 (UTC).

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.  Ron h jones (Talk) 23:06, 10 June 2011 (UTC)

Proposed deletion of Materials for use in vacuum

The article Materials for use in vacuum has been proposed for deletion  because of the following concern:
 * how-to guide

While all contributions to Wikipedia are appreciated, content or articles may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the article to address the issues raised. Removing will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. — RHaworth 21:44, 8 August 2011 (UTC)

 * One of the more ignorant PRODs I've seen.
 * Thanks for this article - vacuum engineering is very sparsely covered as yet. Andy Dingley (talk) 18:35, 9 August 2011 (UTC)

Speedy deletion nomination of ﬂame retardants

A tag has been placed on ﬂame retardants, requesting that it be speedily deleted from Wikipedia. This has been done for the following reason:

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Pworld
Shaddack, why are you no longer on PhantasyWorld?! :'( Miss you  — Preceding unsigned comment added by 82.170.217.74 (talk) 01:21, 27 May 2012 (UTC)

How long did it take you to write the crystal oscillator frequency article?
Sagittarian Milky Way (talk) 20:13, 16 December 2012 (UTC)

 * Difficult to say. It was a piece here, a piece there, the best guess could be "few nights". The list of crystals at my local electronics vendors was bugging me for long enough to take them one by one, and looking up where their frequencies were mentioned in schematics and various documents. Same for other crystals I found in various gadgets I took apart. --Shaddack (talk)

Category:Persistent organic pollutants
Category:Persistent organic pollutants, which you created, has been nominated for possible deletion, merging, or renaming. If you would like to participate in the discussion, you are invited to add your comments at the category's entry on the Categories for discussion page. Thank you. Leyo 16:39, 8 January 2013 (UTC)

Czech help needed
Hello Shaddack, I'm contacting you because we need some Czech translators to help with the deployment of the new VisualEditor on cs.wikipedia. There are help pages, user guides, and description pages that need translating, as well as the interface itself. The translating work is going on over on MediaWiki: Translation Central. I also need help with a personal message for the Czech Wikipedians. If you are able to help in any way, either reply here, or head over to TranslationCentral. Thanks for your time, PEarley (WMF) (talk) 23:51, 13 September 2013 (UTC)

Proposed deletion of Content rating

The article Content rating has been proposed for deletion  because of the following concern:
 * Biased, unreferenced, written like an essay.

While all constructive contributions to Wikipedia are appreciated, content or articles may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the notice, but please explain why in your edit summary or on the article's talk page.

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Information or reference to article: Pyrotechnic fastener
Dear Shaddack,

I saw you edited the article Pyrotechnic fastener. I'm especially interested in the following point:

* RDX/nitrocellulose: gas generator, unsuitable for deep space missions, burn rate dependent on pressure.

Though searching in several books and in the internet, I couldn't find another statement that would support this. I am very happy, if you could give some explanations or references to this topic.

Thank you very much in advance for your help!

Best Regards

S.G.HvW

S.G.HvW (talk) 14:17, 21 October 2013 (UTC)

Speedy deletion nomination of Naomi Internet Filter

A tag has been placed on Naomi Internet Filter, requesting that it be speedily deleted from Wikipedia. This has been done under section G11 of the criteria for speedy deletion, because the page seems to be unambiguous advertising which only promotes a company, product, group, service or person and would need to be fundamentally rewritten in order to become encyclopedic. Please read the guidelines on spam and FAQ/Organizations for more information.

If you think this page should not be deleted for this reason, you may contest the nomination by visiting the page and clicking the button labelled "Click here to contest this speedy deletion". This will give you the opportunity to explain why you believe the page should not be deleted. However, be aware that once a page is tagged for speedy deletion, it may be removed without delay. Please do not remove the speedy deletion tag from the page yourself, but do not hesitate to add information in line with Wikipedia's policies and guidelines. If the page is deleted, and you wish to retrieve the deleted material for future reference or improvement, you can place a request here. —Unforgettableid (talk) 23:57, 31 October 2013 (UTC)

Nomination of Naomi Internet Filter for deletion
A discussion is taking place as to whether the article Naomi Internet Filter is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

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Users may edit the article during the discussion, including to improve the article to address concerns raised in the discussion. However, do not remove the article-for-deletion notice from the top of the article. —Unforgettableid (talk) 03:19, 4 November 2013 (UTC)

Category:Nuclear research centers
Category:Nuclear research centers, which you created, has been nominated for possible deletion, merging, or renaming. If you would like to participate in the discussion, you are invited to add your comments at the category's entry on the Categories for discussion page. Thank you. DexDor (talk) 18:50, 12 October 2014 (UTC)

Incandescent light bulb
Especially in a mature, longstanding article, additions such as your recent ones need inline references to reliable sources to satisfy verifiability. You recently added some information to that article regarding gas and vacuum in incandescent bulbs. Would you kindly add inline references to the statements you added, to verify the material? It sounds right, in general, but where did you find the information? Regards, Edison (talk) 16:15, 4 February 2015 (UTC)

 * All the information is from the "R.C. Ropp - The Chemistry of Artificial Lighting Devices - Lamps, Phosphors and Cathode Ray Tubes", linked to google books from the beginning of the itemized list. I have to run now, so cannot give it the necessary attention myself at this very moment, and I also went out of practice, so please do whatever you consider the best and I'll watch your hands and learn/refresh. Shaddack (talk) 16:54, 4 February 2015 (UTC)

Article on Strontium aluminate
Hi, I recently had a look at the article you originally wrote on strontium aluminate. Unfortunately, it is clear that you not only cited but plagiarized a large part of it (i.e., copied it word-for-word without quotation marks) from page 555 of the Encyclopedia of the Alkaline Earth Compounds. J'accuse, sir. This is not well done. You could have either put the entire article in quotation marks and given the reference (which, of course, would have been a copyright violation, as the book is still under copyright protection and one should not copy whole paragraphs of text from a published source, inside or outside quotation marks), or you should have paraphrased the original author's words using your own (which would have been more work, I know, but Wikipedia is about summarizing and paraphrasing, not plagiarizing). In either case, the article as it stands, while obviously accurate, is problematic. I don't mean to upset you with the accusation, but I have never seen it so boldly done before on Wikipedia and felt compelled to express my concern over its use here (have you done the same thing in other articles??). Would you consider re-writing the article in your own words so that it no longer reflects its source quite so accurately, and put in quotation marks those parts you wish to leave in their original form along with a specific citation for each? Please consider the request. Thanks!  KDS 4444 Talk  18:13, 13 June 2015 (UTC)

 * The book went to print in 2012 (I think), my edit dates back to 2006. (Not the first time my text was lifted word by word from here.) I was wondering; word by word lifts aren't my style, the phrasing in the book was a bit too "my style", so I checked the times. The blame goes the other way! :D Shaddack (talk) 18:23, 13 June 2015 (UTC)
 * I already said this on my talk page, but let me say so again here for the record: Shut my mouth! The bastards...  Can we sue???  :-)  (Also: I have now sent Elsevier a message asking them to explain how they justify such business— will let you know what, if anything, I end up hearing back from them!)  KDS 4444  Talk  16:03, 14 June 2015 (UTC)
 * Aaaaaaand let me update you: I have sent an email to Elsevier pointing out the apparent copyright violation on their part and asking for an explanation. They have responded with the following:

"Thank you for bringing this to our attention.

I will forward your concern to our editor for their review and actions.

Please allow them 24 to 48 hours (excluding weekends) to fully respond to your concern.

If you have any further questions or concerns, please let me know.

Kind Regards,

May Dominguiano Elsevier Customer Service Americas"

Which may mean nothing. Then again...!  KDS 4444 Talk  08:04, 16 June 2015 (UTC)

 * Interesting! :) Let's see how it develops. Thanks much :) Shaddack (talk) 22:42, 16 June 2015 (UTC)
 * Latest update: they have been dragging their heels a bit, it seems, but the customer service rep I have been in touch with finally heard back from the book editor asking me what my "function" is and where I am located. I have explained that I am a Wikipedia editor in southern California, and I gave another summary of the copyright violation that appears to have taken place.  I expect that I will finally hear from the book editor next, and then we shall see what is done.  Just keeping you updated, no need to respond.  KDS 4444  Talk  05:17, 24 June 2015 (UTC)
 * Dude! You realize you licensed everything you've ever written into the public domain, right?  I just saw this on your userpage.  I think this means that Elsevier is free to use whatever you wrote without any attribution at all, and can even claim that it is now their own text and sell it as such!  You gave yourself away! (which is totally your right).  I will still let you know what I hear back from Elsevier, but whatever happens, it seems they are completely off the hook on this.  Shucks.  I was getting kinda excited.  KDS 4444  Talk  12:45, 24 June 2015 (UTC)

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Boldface
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text:
Jerry Farber

Gerald H. 'Jerry' Farber (born 1935) is an American educator, writer, activist and former child actor.

Early life and education
Farber was born in El Paso, Texas in 1935. As an undergraduate student at UCLA in December 1954, he was nominated by the senior staff of the UCLA Daily Bruin to be city editor of the student newspaper, but he and the other four staff nominees for editorial positions were rejected by a special two-man committee composed of student body president Skip Byrne and a representative of the university administration. In the spring term 1955, he and four other students (Fredy Perlman, Martin McReynolds, Barry Tunick and Steve Wayne), issued and distributed an underground newspaper called The Observer on the UCLA campus. Farber subsequently went on to earn a Ph.D. in Comparative Literature from Occidental College in 1970. His dissertation was titled: "The Aesthetic Role of the Present in À la Recherche du temps perdu."

Career
As a child, Farber was a radio actor and also appeared as Fleance in Orson Welles's film version of Macbeth. A member of the 500 Club, made up of child actors who had each appeared in over 500 radio shows, Farber initiated the role of Stevie Kent, president of the Beverly Hills Beavers, on The Jack Benny Program. Among the other radio shows on which he appeared were The Great Gildersleeve, Lux Radio Theatre, The Screen Guild Theatre, The Mercury Theatre on the Air, and Suspense. In addition, he performed in a number of radio adaptations of literary works—appearing as David Copperfield on Favorite Story, as Huckleberry Finn on NBC University Theater, and as Oliver Twist, together with Basil Rathbone as Fagin, on Stars Over Hollywood. He played Twist again, with Rathbone, on a Columbia Records album.

After several years in the English Department at L.A. State College (now California State University, Los Angeles), Farber became a professor of English and Comparative Literature at San Diego State University. Farber taught subsequently for seven years in the English Department at the University of San Diego. He is widely known as the author of a 1967 anti-establishment essay, "The Student as Nigger," in which he likened the student-professor relationship in American universities to that of slave and master. This piece, based on his experience as a teacher and as an often-arrested activist in the civil rights movement, served as the title essay of his first book.

Other books include The University of Tomorrowland and A Field Guide to the Aesthetic Experience. Since then he has published essays that include "The Third Circle: On Education and Distance Learning," "What Is Literature? What Is Art?  Integrating Essence and History," "Toward a Theoretical Framework for the Study of Humor in Literature and the Other Arts," "Teaching and Presence," and "On Not Betraying Poetry." Farber's short story “Gorman,” which appeared in his first book, was included in The Year’s Best Science Fiction No. 4, edited by Brian Aldiss and Harry Harrison.

Civil rights movement participation
In the civil rights movement, Farber was a member of the Non-Violent Action Committee (N-VAC), which was formed as a more militant alternative to the Congress of Racial Equality, and which was active in fighting job discrimination in Los Angeles. He was arrested seven times during this period, serving a number of jail sentences, and was arrested on one further occasion for participating in an anti-Vietnam War demonstration against The Dow Chemical Co., which supplied napalm to the U.S. military. He was present as an observer for N-VAC throughout the Watts Rebellion (often referred to as the Watts Riots) in 1965. His account of this event was first published in the L.A. Free Press and has since been reprinted in Reporting Civil Rights, published by the Library of America.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

title: Jerry Farber


text: Category:Bridges completed in 1896

title: Category:Bridges completed in 1896


text:
Barbados National Pledge

The National Pledge of Barbados is as follows

 * I pledge allegiance to my country Barbados and to my flag,
 * To uphold and defend their honour,
 * And by my living to do credit
 * To my nation wherever I go.

According to the Barbados government website, the Pledge was created by Lester Vaughan, born in 1910. Vaughan died on 16 September 2003, at the age of 92.

title: Barbados National Pledge


text:
Talk:Billy Gilman

Untitled
This article is in bad need of a rewrite. At the bottom half, almost every sentence begins with "Billy". TenPoundHammer 18:32, 9 April 2007 (UTC)

Developing the Billy Gilman page
Further to Bill Gilman's appearance on The Voice and his blind audition singing Adele's "When We Were Young", the number of visitors of the page usually averaging below 300 per day, suddenly skyrocketed after his performance and rave reviews into almost 25,000 on 20 September 2016 (the day of performance), and almost 93,500 on 21 September 2016 just one day into the broadcast of his audition. This prompted me to make major improvements and additions to the page, first of course about his The Voice venture and comeback, but also about his earlier career, various appearances throughout the years and his activism and charities as I expect many will visit the page for updated information as Gilman hopefully progresses further. So all this work was worthwhile proving that Wikipedia is on the pulse of the most recent developments in any current event, and in this case in the progress of upcoming artists and is an ongoing collective effort and work in progress for better and more comprehensive coverage. werldwayd (talk) 21:02, 21 September 2016 (UTC)

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Need for a new photo
The photo we use of Billy Gilman is when he was a child singer. See File:Billy_Gilman_2000_in_Boston.jpg. Meanwhile he is now a mature singer. It is traditional that we use a more recent photo that reflects his actual age. werldwayd (talk) 01:28, 10 January 2018 (UTC)

title: Talk:Billy Gilman


text:
Critical exponent

Critical exponents describe the behavior of physical quantities near continuous phase transitions. It is believed, though not proven, that they are universal, i.e. they do not depend on the details of the physical system, but only on some of its general features. For instance, for ferromagnetic systems at thermal equilibrium, the critical exponents depend only on:
 * the dimension of the system
 * the range of the interaction
 * the spin dimension

These properties of critical exponents are supported by experimental data. Analytical results can be theoretically achieved in mean field theory in high dimensions or when exact solutions are known such as the two-dimensional Ising model. The theoretical treatment in generic dimensions requires the renormalization group approach or, for systems at thermal equilibrium, the conformal bootstrap techniques. Phase transitions and critical exponents appear in many physical systems such as water at the critical point, in magnetic systems, in superconductivity, in percolation and in turbulent fluids. The critical dimension above which mean field exponents are valid varies with the systems and can even be infinite.

Definition
The control parameter that drives phase transitions is often temperature but can also be other macroscopic variables like pressure or an external magnetic field. For simplicity, the following discussion works in terms of temperature; the translation to another control parameter is straightforward. The temperature at which the transition occurs is called the critical temperature $T_{c}$. We want to describe the behavior of a physical quantity $f$ in terms of a power law around the critical temperature; we introduce the reduced temperature

 * $$\tau := \frac{T-T_\mathrm{c}}{T_\mathrm{c}}$$

which is zero at the phase transition, and define the critical exponent $$k$$ as:

 * $$k \, \stackrel{\text{def}}{=} \, \lim_{\tau \to 0}\frac{\log |f(\tau)| }{\log |\tau|}$$

This results in the power law we were looking for:
 * $$ f(\tau) \propto \tau^k \,, \quad \tau\to 0 $$

It is important to remember that this represents the asymptotic behavior of the function $f(τ)$ as $τ → 0$.

More generally one might expect
 * $$f(\tau)=A \tau^k \left(1+b\tau ^{k_1} + \cdots\right) $$

The most important critical exponents
Let us assume that the system at thermal equilibrium has two different phases characterized by an order parameter $Ψ$, which vanishes at and above $T_{c}$.

Consider the disordered phase ($τ > 0$), ordered phase ($τ < 0$) and critical temperature ($τ = 0$) phases separately. Following the standard convention, the critical exponents related to the ordered phase are primed. It is also another standard convention to use superscript/subscript + (−) for the disordered (ordered) state. In general spontaneous symmetry breaking occurs in the ordered phase.

The following entries are evaluated at $Ψ$ (except for the $ρ − ρ_{c}⁄ρ_{c}$ entry)

The critical exponents can be derived from the specific free energy $τ$ as a function of the source and temperature. The correlation length can be derived from the functional $T − T_{c}⁄T_{c}$. In many cases, the critical exponents defined in the ordered and disordered phases are identical.

When the upper critical dimension is four, these relations are accurate close to the critical point in two- and three-dimensional systems. In four dimensions, however, the power laws are modified by logarithmic factors. These do not appear in dimensions arbitrarily close to but not exactly four, which can be used as a way around this problem.

Mean field critical exponents of Ising-like systems
The classical Landau theory (also known as mean field theory) values of the critical exponents for a scalar field (of which the Ising model is the prototypical example) are given by

 * $$\alpha = \alpha^\prime = 0\,, \quad \beta = \tfrac{1}{2}\,, \quad \gamma = \gamma^\prime = 1\,, \quad \delta = 3$$

If we add derivative terms turning it into a mean field Ginzburg–Landau theory, we get

 * $$\eta = 0\,, \quad \nu = \tfrac{1}{2}$$

One of the major discoveries in the study of critical phenomena is that mean field theory of critical points is only correct when the space dimension of the system is higher than a certain dimension called the upper critical dimension which excludes the physical dimensions 1, 2 or 3 in most cases. The problem with mean field theory is that the critical exponents do not depend on the space dimension. This leads to a quantitative discrepancy below the critical dimensions, where the true critical exponents differ from the mean field values. It can even lead to a qualitative discrepancy at low space dimension, where a critical point in fact can no longer exist, even though mean field theory still predicts there is one. This is the case for the Ising model in dimension 1 where there is no phase transition. The space dimension where mean field theory becomes qualitatively incorrect is called the lower critical dimension.

Experimental values
The most accurately measured value of $f$ is −0.0127(3) for the phase transition of superfluid helium (the so-called lambda transition). The value was measured on a space shuttle to minimize pressure differences in the sample. This value is in a significant disagreement with the most precise theoretical determinations  coming from high temperature expansion techniques, Monte Carlo methods and the conformal bootstrap.

Theoretical predictions
Critical exponents can be evaluated via Monte Carlo simulations of lattice models. The accuracy of this first principle method depends on the available computational resources, which determine the ability to go to the infinite volume limit and to reduce statistical errors. Other techniques rely on theoretical understanding of critical fluctuations. The most widely applicable technique is the renormalization group. The conformal bootstrap is a more recently developed technique, which has achieved unsurpassed accuracy for the Ising critical exponents.

Scaling functions
In light of the critical scalings, we can reexpress all thermodynamic quantities in terms of dimensionless quantities. Close enough to the critical point, everything can be reexpressed in terms of certain ratios of the powers of the reduced quantities. These are the scaling functions.

The origin of scaling functions can be seen from the renormalization group. The critical point is an infrared fixed point. In a sufficiently small neighborhood of the critical point, we may linearize the action of the renormalization group. This basically means that rescaling the system by a factor of $C$ will be equivalent to rescaling operators and source fields by a factor of $−T∂^{2}f⁄∂T^{2}$ for some $J$. So, we may reparameterize all quantities in terms of rescaled scale independent quantities.

Scaling relations
It was believed for a long time that the critical exponents were the same above and below the critical temperature, e.g. $P − P_{c}⁄P_{c}$ or $P$. It has now been shown that this is not necessarily true: When a continuous symmetry is explicitly broken down to a discrete symmetry by irrelevant (in the renormalization group sense) anisotropies, then the exponents $P_{c}$ and $H$ are not identical.

Critical exponents are denoted by Greek letters. They fall into universality classes and obey the scaling and hyperscaling relations

 * $$\begin{align}

\nu d &= 2 - \alpha = 2\beta + \gamma = \beta(\delta + 1) = \gamma \frac{\delta + 1}{\delta - 1} \\ 2 - \eta &= \frac{\gamma}{\nu} = d \frac{\delta - 1}{\delta + 1} \end{align}$$

These equations imply that there are only two independent exponents, e.g., $χ$ and $∂ψ⁄∂J$. All this follows from the theory of the renormalization group.

Percolation theory
Phase transitions and critical exponents also appear in percolation processes where the concentration of "occupied" sites or links of a lattice are the control parameter of the phase transition (compared to temperature in classical phase transitions in physics). One of the simplest examples is Bernoulli percolation in a two dimensional square lattice. Sites are randomly occupied with probability $$p$$. A cluster is defined as a collection of nearest neighbouring occupied sites. For small values of $$p$$ the occupied sites form only small local clusters. At the percolation threshold $$p_c \approx 0.5927$$ (also called critical probability) a spanning cluster that extends across opposite sites of the system is formed, and we have a second-order phase transition that is characterized by universal critical exponents. For percolation the universality class is different from the Ising universality class. For example, the correlation length critical exponent is $$\nu = 4/3$$ for 2D Bernoulli percolation compared to $$\nu = 1$$ for the 2D Ising model. For a more detailed overview, see Percolation critical exponents.

Anisotropy
There are some anisotropic systems where the correlation length is direction dependent.

Directed percolation can be also regarded as anisotropic percolation. In this case the critical exponents are different and the upper critical dimension is 5.

Multicritical points
More complex behavior may occur at multicritical points, at the border or on intersections of critical manifolds. They can be reached by tuning the value of two or more parameters, such as temperature and pressure.

Static versus dynamic properties
The above examples exclusively refer to the static properties of a critical system. However dynamic properties of the system may become critical, too. Especially, the characteristic time, $ξ$, of a system diverges as $d$, with a dynamical exponent $⟨ψ(x) ψ(y)⟩$. Moreover, the large static universality classes of equivalent models with identical static critical exponents decompose into smaller dynamical universality classes, if one demands that also the dynamical exponents are identical.

The equilibrium critical exponents can be computed from conformal field theory.

See also anomalous scaling dimension.

Self-organized criticality
Critical exponents also exist for self organized criticality for dissipative systems.

External links and literature

 * Hagen Kleinert and Verena Schulte-Frohlinde, Critical Properties of φ4-Theories, World Scientific (Singapore, 2001); Paperback ISBN 981-02-4658-7
 * Toda, M., Kubo, R., N. Saito, Statistical Physics I, Springer-Verlag (Berlin, 1983); Hardcover ISBN 3-540-11460-2
 * J.M.Yeomans, Statistical Mechanics of Phase Transitions, Oxford Clarendon Press
 * H. E. Stanley Introduction to Phase Transitions and Critical Phenomena, Oxford University Press, 1971
 * Universality classes from Sklogwiki
 * Zinn-Justin, Jean (2002). Quantum field theory and critical phenomena, Oxford, Clarendon Press (2002), ISBN 0-19-850923-5
 * Zinn-Justin, J. (2010). "Critical phenomena: field theoretical approach" Scholarpedia article Scholarpedia, 5(5):8346.
 * D. Poland, S. Rychkov, A. Vichi, "The Conformal Bootstrap: Theory, Numerical Techniques, and Applications", Rev.Mod.Phys. 91 (2019) 015002, http://arxiv.org/abs/1805.04405
 * F. Leonard and B. Delamotte Critical exponents can be different on the two sides of a transition: A generic mechanism, Phys. Rev. Lett. 115, 200601 (2015), https://arxiv.org/abs/1508.07852,

title: Critical exponent


text:
Talk:Expo (magazine)

From Israel Shamir: I give copyright permission to use a page from my site www.israelshamir.net

This is a far-left (communist) publication
It needs to be made clear that this is a far-left publication, which one will discover with only a little research. It is for instance mentioned that Expo cooperates closely with Antifa Infoblatt in Germany. Antifa Infoblatt is described as extremists and is under surveillance by German authorities, for a thorough report on the "Antifa" movement in Germany, check out Verfassungsschutzbericht 2007. Both Antifa Infoblatt, Expo and the other publications mentioned are part of the "antifa" ("antifascist") movement. A brief description of this movement from Verfassungsschutzbericht 2007, page 67:

 * "Der „Antifaschismus“, das traditionelle Aktionsfeld von Linksextremisten, blieb weiterhin im Fokus ihrer „politischen“ Arbeit. Dabei richtet sich der „Antifaschismus“ nur vordergründig auf die Bekämpfung rechtsextremistischer Strukturen. Eigentliche Stoßrichtung ist die freiheitliche demokratische Grundordnung als „kapitalistisches System“, um die angeblich diesem Gesellschaftssystem immanenten Wurzeln des Faschismus zu beseitigen."

Both the founders of Expo were well-known communists, i.e. supporters of a totalitarian and anti-democratic ideology. TYRXrus (talk) 17:08, 19 April 2009 (UTC)

 * Do you have any reliable sources to back up your claims? // Liftarn (talk) 20:54, 20 April 2009 (UTC)
 * If it was a far-left publication, newspapers like Dagens Nyheter (independent liberal) and Svenska Dagbladet (independent conservative) wouldn´t publish information and quotes from them. But since they do, and are sweden biggest newpapers, and since you don´t have to be far left for being aganist nazism, fascism and racism TYRXrus won´t have a source.--Pjaha (talk) 23:35, 19 January 2010 (UTC)
 * TYRXrus, Liftarn and Pjaha: Here are some reliable sources. Stieg Larsson was a well known communist, read the part Activism and journalism. He was very active in the Communist Workers League, a Trotskyist political party. While I don't know if Tobias Hübinette is a communist, he has been politically active as a syndicalist and an activist in the far-left Anti-Fascist Action. Utopiantos (talk) 19:21, 9 August 2015 (UTC)
 * So you're trying to do some kind of guild by association? What about getting some reliable sources instead? // Liftarn (talk) 19:47, 9 August 2015 (UTC)

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A Swedish Defence Research Agency report
The Swedish Defence Research Agency has apparently classified EXPO as a leftwing extremist organisation. This seems important to mention in the article:

https://www.foi.se/en/our-services/fois-reports--publications/summary.html?reportNo=FOI-R--4592--SE

https://www.journalisten.se/nyheter/expo-listad-i-foi-rapport-om-vansterextremism

http://www.eposten.se/nyheter/extremism-under-radarn-unt4988030.aspx

David A (talk) 14:46, 17 June 2018 (UTC)

 * Your sources does not support your claim. It's more a case of sloppy editing led to Expo being included in a report. It's just a case of accidental guilt by association. Btw, your link to Enköpingsposten is an editorial and thus not a reliable source. // Liftarn (talk) 09:41, 18 June 2018 (UTC)

 * Has the SDRA removed the mention in the report? If they have not done so by now, I doubt that there was a mistake in the research. David A (talk) 08:29, 19 June 2018 (UTC)

 * The report only mentions Expo one and all it says is "I Sverige är Research gruppen och Stiftelsen Expo två exempel på organisationer som också granskar nationalistiska miljöer" (In Sweden, the Research Group and the Expo Foundation are two examples of organizations that also examine nationalist environments) so the report does not support your claim. // Liftarn (talk) 09:08, 19 June 2018 (UTC)

 * If that is all, I agree that it does not seem severe enough to mention. David A (talk) 12:37, 19 June 2018 (UTC)
 * It's actually already in the article, it says "investigative journalism focused on nationalist, racist, anti-democratic, anti-semitic, and far-right movements and organisations". May I suggest you check what the sources actually say before drawing wild conclusions (or, which is more likely, blindly believe what far right websites say). // Liftarn (talk) 13:25, 19 June 2018 (UTC)
 * I don't think that Nyheter Idag is far right. They just seem worried about crime, collapsing welfare and Islamism. David A (talk) 14:40, 19 June 2018 (UTC)
 * Well, then you are wrong. The problem is that they lie and distort the truth and it appears you are gullible enough to swallow it without bothering to check the facts. // Liftarn (talk) 22:31, 19 June 2018 (UTC)
 * More like I have ADD and am constantly very overworked, so my focus and attention span are not very good. Anyway, I read articles from a wide variety of Swedish and international newspapers all over the spectrum, so I try to keep myself informed. David A (talk) 04:55, 20 June 2018 (UTC)
 * Knowing that you should perhaps be more careful and try to find out what reliable sources actaully say instead of promoting far right conspiracy theories on Wikipedia. // Liftarn (talk) 06:37, 20 June 2018 (UTC)
 * Again, I don't think that Nyheter Idag seem to remotely be social-Darwinists. Let's try to not assign the term far-right too easily. It diminishes the term when faced with true evil. David A (talk) 06:45, 20 June 2018 (UTC)
 * Regardless, you are correct that I should have checked this up more, rather than go by vague memories. David A (talk) 15:04, 19 June 2018 (UTC)
 * To clarify, I think that it is good that they investigate rightwing extremists. I am just suspicious about that they seem to assign the designation too easily, and do not investigate leftwing extremists or Islamists to anywhere near the same degree, despite that they are much more powerful in Sweden according to SÄPO, if I remember correctly. David A (talk) 15:54, 19 June 2018 (UTC)
 * That depends. The far right is by far more violent an is much more dangerous for the general public, but SÄPO worries about the state itself so they have other priorities. // Liftarn (talk) 22:31, 19 June 2018 (UTC)
 * Well, personally I consider all varieties of intolerant genocidal fascists equally bad, but the Nazis are a much weaker force in the world than the Islamists and Communists. David A (talk) 04:55, 20 June 2018 (UTC)
 * You are entitled to your own opinions, but not your own facts. // Liftarn (talk) 06:37, 20 June 2018 (UTC)
 * It is a fact that there are much greater numbers of Islamists and Communists in the world than there are Nazis. Almost half my family tree was exterminated by Nazis, so I am extremely opposed to them, but I don't see them as nearly as much of a threat nowadays. David A (talk) 06:43, 20 June 2018 (UTC)

title: Talk:Expo (magazine)


text:
Talk:S Matrix

S Matrix From Wikipedia, the free encyclopedia. This article should be merged with S matrix. If you disagree with this request, please discuss it on the article's talk page.

Based on the text of both pages, yes. They both seem to talk about some quantum physics phenomenon (of which i am ignorant).

But the S M/matrix i was looking for is related to Scattering_Parameters, which may or may not be related to Computer Network Theory as the stub suggested, and is part of RF Engineering theory (for 2-port and multi-port networks).

So could we please get a different page on the RF S-matrix? (if i pass this exam, i might even write it myself...)

edit: i just saw the post on the other talk page http://en.wikipedia.org/wiki/Talk:S_matrix so yes, merge the 2 existing to leave room for an RF version.

title: Talk:S Matrix