User talk:DrBob
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Welcome back DrBob! I haven't seen you in Recent Changes for a while (although you may just be contributing at times I don't). --mav
DrBob - I am the Guilty One who changed lens to lens (optics). There is now a certain amount of discussion at Talk:Lens (optics). Awaiting yor input! -- Hugh2414 09:32, 8 Mar 2004 (UTC)
Welcome to Wikipedia, Dr.Bob!
I see that you are making interesting additions, specially in electronics and optics related articles. -- AstroNomer---- Yes, welcome, Dr. Bob! Thanks for your good work here. --User:Larry Sanger
Thank you for the warm welcome, guys. -- DrBob
Hey, great to have you on board! Could you please check over color and refractive index? I wrote those but I'm not an expert, I just asked around on usenet. Thanks --AxelBoldt
They look OK to me, I may make some minor revisions to clarify a few points --- DrBob
Hi, I did most of electromagnetic spectroscopy. Do you know why continuous spectrum arise? (I left a note where it needs to be explained). thanks - User:sodium
Hi, User:sodium recommended that I came to your with a question I have concerning cis/trans isomerism. Am I right is assuming that cis/trans isomerism is dependant on the atomic mass of the functional groups? For example, in the case of 1,2 dichloro ethene, would the fact that it exhibited geometric isomerism be dependant on the isotopes of the two chlorine atoms being equal? Thanks! User:Ddroar - Thanks for your answer, sounds logical to me, just something that bothered me, really.
Hi! I just saw the diagrams image:Holography-record.png and image:Holography-reconstruct.png that you uploaded. They look great! I'd love to be able to use them on the French (http://fr.wikipedia.com/) and Esperanto (http://eo.wikipedia.com/) sections of the wiki; would it be any trouble to upload versions without the text so they can be cleanly relabelled? --Brion VIBBER
Also, I like the fact that you've uploaded the "source" files for the illustrations as well, but it would be better if they were in some standard format like EPS or PDF instead of the Adobe-specific AI.
- FWIW, these AI files seem to actually be PDF. Ghostscript can handle them. --Brion
It looked like some kind of PostScript, but GIMP and GV choked on the one I tried. I'll try running GS manually. --LDC
- Hmm, Gimp does seem to choke. I can open media:Quadrilateral.ai with GSview (http://www.cs.wisc.edu/~ghost/gsview/) with no problem, though. (Using Ghostscript 7.04) --Brion
Thanks for helping the flesh-out process for fluorine Dr Bob. I've been neglecting that entry of late. --mav --- Hi DrBob I'am interrested in writing an article about photographic lenses but I don't know how to insert it. Can you rework your disanbigation to make space for it ? It seems you also have contributed to Rainbow. I believe the photo is a fake. What's your POV ?
Thanks.
I've added some comments of the rainbow in User talk:Ericd
Hi, Dr. Bob; very pleased to run across you.
On Talk:Diode bridge, in the second of the second-level bullet points, i criticized the diagrams of Diode bridge, but my graphics skill is about nil. I'm betting, based on your background, that you can read a simple circuit diagram and that you can infer what i would draw if i had your skills. Of course you may have your own ideas about what should be done once you see it. I'd be please if you even took a look. --Jerzy(t) 04:42, 2004 Mar 5 (UTC)
That's beautiful; besides the layout, i like your "graphic font" (if you'll permit that coinage) better. I didn't look at any of your work before requesting, but it's obvious now that you have a sense of what visual communication is about.
I think you will have already concluded that i prefer to defer to your judgement abt the color vs. monochrome issue and of course what exact monochrome symbology would work. That's now more the case than ever!
It's obvious to me how to substitute yours for the old ones, but do you also do page layouts? (I edited Alessandro Volta's text around some fancier layout of graphics than what Diode bridge has, and got a sense that either i was over my head even in that, or that fancier layout in HTML is inherantly a risky proposition as window sizes and shapes change.) If you wanted to edit the page layout of Diode bridge as it stands, it looks to me as if the sizes are close enuf that my substituting your graphics and editing the text to correspond to them, in the same edit, would work well. (Tho of course it's not "my" article, and your taking over from where i last stopped would be fine -- and odds-on an improvement as long as it's not a waste of your skills.) --Jerzy(t) 19:27, 2004 Mar 5 (UTC)
Thanks so much! Besides the straightforward virtues they exhibit, you were insightful enough to use grey in the color diagrams. Merely brilliant!
It's only bcz i am so sure it's such a trivial further suggestion that i note the inconsistency of omitting "conductor junction" dots at the capacitor's connection points.
I don't write that much about circuitry, but when i do, you should expect to hear from me again. And i'll trust in your willingness to be "he who first cries 'Hold, enough!'" when appropriate. --Jerzy(t) 21:46, 2004 Mar 6 (UTC)
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Non-sensical Sellmeir coefficients
First, the BK7 demonstration of the Sellmeier equation is a nice illustration of its primary use. However, the primary advantage of using the Sellmeier equation over other equations such as a simple power series expansion is its physical significance. For glasses, the first two terms are typically assigned to oscillators in the UV with the third in the IR. In your notation, the Ci coefficients represent the oscillator wavelengths. You assign C2 a negative value of -1.18225x10-2 which is nonsense. This is probably the result of not constraining the values of Ci to physically meaningful values greater than zero during the non-linear regression or it could be the regression converged on a local minima instead of the absolute minima of the fit.
- You're right, negative C_2 doesn't make a lot of sense, does it? I've no idea where I looked up the original coefficients, but I've changed them to the values for BK7 from the Schott catalogue. Graphing those gives a near-identical curve, so you're probably correct about how the originals were found. -- DrBob
I think the evolution of the Faraday effect page is a very strong example of the power of collaborative development. In particular, I am really glad that you contributed the diagram. I may be wrong, but could you double check the direction of rotation shown for beta, because I think it might be reversed. AJim 18:43, 12 Mar 2004 (UTC)
- Answered at User talk:AJim.
- Thanks. and my reply is there. AJim 14:56, 13 Mar 2004 (UTC)
No problem. :) I might get to more of them later. - Hephaestos|§ 21:47, 15 Mar 2004 (UTC)
Hi again,
I was just admiring your picture collection, going through the list you added. Seeing them all in one place, I am even more impressed. I love those colors.
I think there may be a small error in the Sellmeier equation diagram, the x axis is labelled nm but I think it may be micro meters.
AJim 04:21, 18 Mar 2004 (UTC)
Hi DrBob,
I bet you could make a really neat schematic of a Czerny-Turner monochromator. I saw one in Photonics Spectra July 2003 p21 I don't believe. The world could use a good one. AJim 04:15, 22 Mar 2004 (UTC)
I was right! Thank you very much. AJim 01:39, 24 Mar 2004 (UTC)
"Well, well, well...What have we here?..." - I nearly died laughing. Thank you! fabiform | talk 19:10, 1 Apr 2004 (UTC)
Hi DrBob, re the Pine and Scots pine articles, the old name 'fir' was mentioned before all this blew up (in the Scottish form Scots fir, rather than with the English spelling 'scotch', which causes offence to many in Scotland, being percieved as a English invader's imposition). True that use of 'fir' specifically for pines did take a long time to die out, but it has now, and pine has been the majority use for at least the 250 years I cited (it may have been long before then, but I don't have data; the OED cites e.g. Turner's 1562 Herball as using pine). I would agree that a reference to 'Fir' or 'Scots fir' as a historical usage does have a place in the article. - MPF 00:32, 7 Apr 2004 (UTC)
I noticed your addition of the chemical structure diagram to Mirtazapine. It's great. Thanks! Defenestration 04:33, 7 Apr 2004 (UTC)
So what do you use to make these diagrams, anyway? - Omegatron 20:05, Apr 8, 2004 (UTC)
Hi again, Doc. I thought of you almost immediately on reading Vesicle pisces and then Vesica piscis (oh, and now Ichthys, and hmm, Darwin fish). And not just because the "almond shape" is more precisely the cross-section of a double-convex lens of optics. Not a project that requires your skills, nor one of great weight, but by the same token, probably not one that would take much of your time. So i thought it might be worth letting you be aware of the graphic deficit. Thanks again. --Jerzy(t) 15:43, 2004 May 11 (UTC)
thanks for editing the Magnifying glass article, I tried a few times to get the second photo alignment right with no results. - wolfenSilva
Very nice figures! You seem very talented in this area. Latitudinarian 01:38, 22 May 2004 (UTC)
diagrams
Yes, It would be great if you added some new diagrams (and old diagrams from wikipedia) to Wikibooks. Take a look at the wikibooks:Physics Study Guide. Optics could use some nice light ray diagrams. Latitudinarian 15:58, 22 May 2004 (UTC)
Hello DrBob, I am gearing up to fix up the ice page to include a phase diagram, and fill in pages for all of the various ice phases. I could use some help making figures for the various crystal structures as well as the phase diagrams. I have admired your many and beautiful figures, so a) could you help make figures for ice or perferably b) could you show me your magical techniques?! Do you use open source software to create these figures? I've heard rumors about latex packages for crystalography, but I don't do crystalography, so I don't know. Is it pstricks for us open source users? --dikaiopolis
math-ising
Thanks - I presume you are thinking of photon? I was only repeating what I had seen someone else do in lighter than air since I thought it looked better and was more consistent. Inline maths usually seems to get rendered as html anyway, but I see the error of my ways and will revert to ''-ing. -- ALoan (Talk) 16:14, 8 Jun 2004 (UTC)
Gain-switching
Hi DrBob, thanks for your additions to Gain-switching. I'd appreciate your having a look at Laser diode rate equations too. Whilst these equations are correct, I recall that the equations can be presented in many different ways. I've been out of it for a while so the equations may not be ideal ;)
Periscopes & binoculars
Thanks for all the diagrams you've done. If you're still offerring to do diagrams, the periscope article could use an optics diagram. Also, thanks for the binoculars diagram. As a minor suggestion can you make the porro prisms in the binoculars diagram more like the diagram in the porro prism article? They currently look more like lenses. Thanks! Samw 16:42, 4 Jul 2004 (UTC)
Kudos! and, of course, requests.
I noticed your illustration on pentaprism. Nice work! I was thinking that there was no way someone had gone to the trouble of illustrating that, but there it was---not just an illustration, but a really nice one to boot. Thanks!
I've been working on some of the photography articles. Since you're knowledgeable about optics, I was wondering it you could have a look at wide-angle lens, prime lens, normal lens, zoom lens and telephoto lens. I don't know if they could all benefit from illustrations, but I think zoom lens definitely could. I don't actually know how these things work internally, however, so I can't be of much help.
Any change of a diagram for view camera or rangefinder camera while I'm at it? (If you can only do one, the first would be preferable.) If you want some non-free diagrams to work off of (I've found a few around the web), just ask and I'll provide. grendel|khan 03:30, 2004 Sep 13 (UTC)
redlinks
Oh my! That will teach me to meddle in articles I'm unfamiliar with. I apologize for putting you to the trouble of fixing my mistakes. Joyous 01:01, Oct 20, 2004 (UTC)
A Bridge Too Far?
DD, S Story: i never write, never call, until i want something. Diode bridge again; the addition of the three-phase material to the end of Diode bridge included Image:New tridge rectifier.jpg, whose style is quite different from your fine one on that page. In my phant'sies of graphic competance, i imagine a diagram that is slightly pictorial (while remaining schematic) in that it would use the same layout as the photo Image:Tridge rectifier.jpg -- tho i would also rejoice to see some clever or obvious adaptation (extra input & diodes) of a cross (AC labels but no capacitor, since no hint of one in photo) between Image:Diodebridge1.png and Image:Diodebridge4.png.
In a closely related matter, Three-phase electric power (which i haven't bothered to link Diode bridge to yet, bcz of its, uh, non-encyclopedic style), needs a diagram with either one three-color graph of sine curves staggered by 120 degrees, or a stack of three single-curve graphs. (I don't know if there's a convention for whether the "next" phase mentioned lags or leads the previously mentioned one, so if it were me, i'd probably label them α, β, & γ rather than either "AC1", "AC2", "AC3", or A, B, C, to be as noncommittal as practicable. [Strikes own forehead in a stunning blow] If i'm so smart, how come i ain't thot of this earlier? Label the curves Rd, Gn, Bl (or whatever colors you choose). Afterthot: OK, i just read the 2nd 'graph of Three-phase electric power. [shrug])
TIA, again.
--Jerzy(t) 19:26, 2004 Nov 4 (UTC)
Thanks so much!
Getting your support vote on my RFA really meant a lot, especially since you had to clean up a big glob of my errors. Happy editing! Joyous 00:07, Nov 16, 2004 (UTC)
Image copywrite
Hi! Thanks for uploading Image:Orthorhombic-body-centered.png. I notice it currently doesn't have an image copyright tag. Could you add one to let us know its copyright status? (You can use {{gfdl}} if you release it under the GFDL, or {{fairuse}} if you claim fair use, etc.) If you don't know what any of this means, just let me know where you got the images and I'll tag them for you. Thanks so much, Edwinstearns 16:16, 9 Dec 2004 (UTC)
Article Licensing
Hi, I've started a drive to get users to multi-license all of their contributions that they've made to either (1) all U.S. state, county, and city articles or (2) all articles, using the Creative Commons Attribution-Share Alike (CC-by-sa) v1.0 and v2.0 Licenses or into the public domain if they prefer. The CC-by-sa license is a true free documentation license that is similar to Wikipedia's license, the GFDL, but it allows other projects, such as WikiTravel, to use our articles. Since you are among the top 2000 Wikipedians by edits, I was wondering if you would be willing to multi-license all of your contributions or at minimum those on the geographic articles. Over 90% of people asked have agreed. For More Information:
- Multi-Licensing FAQ - Lots of questions answered
- Multi-Licensing Guide
- Free the Rambot Articles Project
To allow us to track those users who muli-license their contributions, many users copy and paste the "{{DualLicenseWithCC-BySA-Dual}}" template into their user page, but there are other options at Template messages/User namespace. The following examples could also copied and pasted into your user page:
- Option 1
- I agree to [[Wikipedia:Multi-licensing|multi-license]] all my contributions, with the exception of my user pages, as described below:
- {{DualLicenseWithCC-BySA-Dual}}
OR
- Option 2
- I agree to [[Wikipedia:Multi-licensing|multi-license]] all my contributions to any [[U.S. state]], county, or city article as described below:
- {{DualLicenseWithCC-BySA-Dual}}
Or if you wanted to place your work into the public domain, you could replace "{{DualLicenseWithCC-BySA-Dual}}" with "{{MultiLicensePD}}". If you only prefer using the GFDL, I would like to know that too. Please let me know what you think at my talk page. It's important to know either way so no one keeps asking. -- Ram-Man (comment (http://en.wikipedia.org/w/wiki.phtml?title=User_talk:Ram-Man&action=edit§ion=new)| talk)
Acetone | your user-page
Minor edit to your user-page, please check to see that I'm not mangling your intent.
Please check the figure on Acetone, and I'd like more information on the tidbit you mentioned in the Acetone talk page added to the article (if you can find it).
-- ~ender 2005-02-12 12:17:MST
Organic Molecule Image
Hello! It was pointed out on the talk page for IUPAC nomenclature that a name in the text 4-(1-methylpropyl)octane, which also had an illustration created by you, was incorrect. I examined the situation and came to the same conclusion. The molecule should instead be named 3-methyl-4-propyloctane. The image is linked below so you can see which one I mean:
Missing image
Iupac-alkane-5.png
3-methyl-4-propyloctane
I've commented it out of the IUPAC nomenclature page for now, and I made a slight tweak to the text beneath the image so that it would be correct (the incorrect name was replaced with 4-(1-methylethyl)octane, which doesn't have a substituent of length equal to the "end" of the molecule as shown). Please feel free to triple-check my changes if you wish (although I have absolute certainty they're correct), and could you make another version of the image so we have the correct version shown? Thanks! --Waldo
Holography
Hi,
I want to add some text about digitial holography. Do you have an editable version of your holography diagrams? Basically I want to replace the object with an lcd display. Be nice to show both a reflective LCD (so diagram looks pretty much exactly the same) and a transmitive LCD(the light goes through it instead, then hits a mirror or plate)
Question
Say... you wouldn't happen to be the same person who does Star Trek: Rennaissance, would you? Erre 02:07, 9 Mar 2005 (UTC)
Picture move
Though you do not seem very active anymore I just thought I'd tell you I have moved your Pulteney Bridge image to a new location Image:Pulteney Bridge, daytime, from weir.jpg. I have updated your /Figures link. --Oldak Quill 09:27, 1 Apr 2005 (UTC)
