User talk:Cmglee/archive2014

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Topics started in 2014

Absolute Tower #2

Hi Cmglee, I like your picture for Absolute Tower #1. It clearly illustrates the degree each floor rotates. Is there any chance you also have the data for Tower #2? Would you please drop me a note if you have the data? Thanks! — Preceding unsigned comment added by Davidly2k (talk • contribs) 13:12, 30 January 2014 (UTC)

Thanks, but sorry, Tower 1 was the only one I found. cmɢʟee⎆τaʟκ 14:31, 30 January 2014 (UTC)

Visual comparison of convolution, cross-correlation and autocorrelation.

Hello Cmglee. You seem to have done a lot of work for the world, it's great. I might be wrong however I think I have found an error in your illustration in 'Visual comparison of convolution, cross-correlation and autocorrelation.'.

Based on the definition of cross-correlation in https://en.wikipedia.org/wiki/Cross-correlation :

$(f\star g)[n]\ {\stackrel {\mathrm {def} }{=}}\sum _{m=-\infty }^{\infty }f^{*}[m]\ g[m+n].$

$f$ is filter and $g$ is the signal which the filter $f$ is applied. As cross-correlation is not commutative (unlike convolution), this interpretation can not be inverted. Therefore I think the symbol f and g in your illustration must be switched. Ttlxjdycj (talk) 13:28, 12 February 2014 (UTC)

Please see File_talk:Comparison_convolution_correlation.svg. Cheers, cmɢʟee⎆τaʟκ 02:05, 19 September 2014 (UTC)

Singing on the River

Brightened

I've been editing the Trinity College, Cambridge page to update the 'Masters of the College' section, and noticed that your Singing on the River photo is very dark (especially noticable in the thumbnail). Might it be tweaked to show things more clearly? I've done a quick fix using Preview which you can see at https://www.dropbox.com/s/7xlvr2h1u9tb3kv/singing%20on%20the%20river.jpg (I've moved it to a different folder; see below for details), which you are welcome to use if you wish (I started with the full size picture to produce this), though you might be able to make a better version with jazzier software. By the way, the conductor is Trinity's Director of Music, Stephen Layton, if you'd like to add that somewhere appropriate. --Brian Josephson (talk) 09:50, 9 March 2014 (UTC)

Thanks for your work on the article and picture. I've brightened it as far as I dared without the noise becoming overwhelming (the picture was taken at high ISO) and uploaded it. I also added your comment about the conductor to the image's description. cmɢʟee⎆τaʟκ 23:21, 9 March 2014 (UTC)

I see your point about noise, in the reflections of the trees in the river particularly, though that is only apparent with very large image sizes which most people will not use. By increasing the contrast it is possible to make the picture brighter while keeping the tree reflections very dark so the noise becomes less conspicuous. I've made a quick attempt at this, and you can see both in a single folder, https://www.dropbox.com/sh/c24kw46qp1lung6/XkadFSYBY3, so you can compare the two easily. I must say I prefer it lighter even if that means not making it available at super-high resolution (but then again it might be argued that the darker one better represents the reality), but of course there's no reason why both can't be made available even if only one is linked directly to the article. --Brian Josephson (talk) 10:15, 10 March 2014 (UTC)

Am I right in thinking that not all of the different size versions have been brightened? It looks to me as if only the 3,072 × 2,048 pixels and 1,280 × 853 pixels ones have been reprocessed and the others are still dark. It would be good if you could brighten the 800 × 533 pixels one as well as that's the one that shows by default when you click on the thumbnail. But it looks as if that might not be under your control? --Brian Josephson (talk) 16:42, 11 March 2014 (UTC)

I've no control over the Mediawiki software in this respect: all thumbnails are generated from the same source image. Some thumbnails may appear darker because they are the old versions which it has not yet updated, but they will change in due course.

I'll employ a workaround using the Annotated image template to crop the thumbnail on the page. Let me know what you think. cmɢʟee⎆τaʟκ 20:52, 11 March 2014 (UTC)

Actually, I think it is better uncropped as with it cropped you don't get so much of a sense of the watching crowd, which adds atmosphere, though a lesser crop could work. Also I don't think it is good having the singers so close to the left side of the frame, but I suppose you don't have much control over that. The darker images are still dark at this time, but in any case the current situation is a lot better than at the start where the thumbnail on the main page was a lot too dark.

Update: it looks like the update robot has now brightened all the images. My feeling now about cropping is that the most aesthetic crop would be to crop the left side so that the illuminated window in the background just fits in. But it's really up to you to decide as it's your photo.

If I went last year (I'm not sure if I did or not), we would have been quite close to you! Perhaps we'll meet at a Cambridge gathering some time -- I hadn't realised such things existed till I stumbled on that page by accident.--Brian Josephson (talk) 21:32, 12 March 2014 (UTC)

Are you still in Cambridge? If so, I'd love to meet you at an upcoming meetup where editors can talk about not only Wikipedia but also other Wikimedia ideas.

As for the picture, I don't mind your editing the page any way you see fit. Feel free to revert my crop. The other thing you could do it's to upload your brightened version (we'll have to fill an OTRS form for me to do itt.), display it as a thumbnail, and make it link to my original when someone clicks on i you upload it,t. If you're unsure of the Wikitext syntax, once tell me and I'll update the article. cmɢʟee⎆τaʟκ 22:21, 12 March 2014 (UTC)

I don't have time for the complexities of replacing your picture with my adjusted version, but have adjusted the parameters for the thumbnail so as to rebalance the picture.

I am still in Cambridge, but I see the next future meet is last year(!) and I don't possess a time machine ... but I'll watch for it. Perhaps Cambridge can figure out a way to deal with the 'teenage gang' problem (see my compilation The World is Watching) which seriously disrupts some of the pages I've been trying to make better balanced. --Brian Josephson (talk) 10:04, 13 March 2014 (UTC)

I didn't realise you're Professor Josephson; it's an honour to communicate with you, Sir! Sorry, I overlooked how out-of-date that page is; this is a more recent one, but there doesn't seem to be one planned for Cambridge, UK.

I support your views on "teenage gangs". I suppose one of the traits of Wikipedia is its overturning of structures of authority, where supposedly all edits, whether from Nobel laureates or teenage dropouts are given the same amount of importance or respect, and only references from reputable sources matter. However, as with any large human system, a new power structure has emerged, just as in other volunteer-based organisations I've experienced. I just try to stay clear of hotspots and do illustrations on concrete topics which I find less contentious.

Incidentally, if you've any topics in your field you think could be improved with an illustration, please let me know and I'll see if it's within my abilities! cmɢʟee⎆τaʟκ 23:29, 15 March 2014 (UTC)

I've had another go with the Singing on the River thumbnail as you may have seen. I guess one has to choose between a good view of the singers, or getting the overall atmosphere including the audience, you can't have both in the thumbnail as it is so small (and I reduced the height slightly in my latest to get better framing).

The RS constraint would matter less if the teenage gangs didn't impose their own interpretation (as they do with 'fringe topics', which is more serious; defining something thus legitimises all sorts of damage). When you say 'new power structure', are you referring to the structure I'm familiar with, which empowers the gangs, or is that changing?

Re your query about illustrations, there's a nice picture by Debendetti and Errington, in http://arxiv.org/ftp/cond-mat/papers/0206/0206354.pdf, of a 15-molecule water cluster obtained by computer simulation (molecules cluster in such a way as to maximise the space they take up) which could illustrate the memory of water page (Debenedetti has sent me a colour version), but there's absolutely no point in making a graphic from that for the water memory page as the cabal would instantly cook up some reason for removing it. But the simulation does nicely refute the common view that liquid water is just separate molecules -- the clusters in the simulation are very specific. --Brian Josephson (talk) 09:59, 16 March 2014 (UTC)

Well done on the thumbnail, Brian. Since we're on this subject, I wonder if you've any opinion on this topic: Talk:Trinity_College,_Cambridge#Singing_on_the_River.

About "gangs", I think it's a broad label that covers people with an agenda (beyond presenting facts as neutrally and truthfully as possible) to push. What constitutes a reputable source is difficult to define, and everyone draws the line differently.

I had a quick look at your paper and it's certainly beyond my knowledge scope to evaluate it. It seems like a different phenomenon from this article. If so, I think it's rather unfortunate that they share the same name, as the latter is not very highly regarded (putting it mildly). cmɢʟee⎆τaʟκ 13:15, 19 March 2014 (UTC)

I've tracked down the situation re earlier singing on the river, it was the CU Madrigal Society: see the edits on the page. Re the memory of water, the authors did a computer simulation showing that large clusters of water molecules form according to it. This in theory could provide a mechanism for memory, though their simulation doesn't show how long the clusters last. But I suspect a subtler and more global organisation (cf. quasicrystals) is the mechanism for memory.--Brian Josephson (talk) 16:50, 19 March 2014 (UTC)

Thanks for researching and updating the Singing on the River society. By the way, I've just spotted a little coincidence that someone had added a photo I took of the Wren Library to your page! cmɢʟee⎆τaʟκ 13:31, 24 March 2014 (UTC)

Why constellations are defined the way they are

I found myself on your user page following a watchlist notification and noted that you were surprised at the fact that constellations are defined by astronomers as regions of the sky rather than the familiar star groupings. The explanation is very simple: it is a way to indicate roughly where in the sky an object such as a comet is at any given time, without the observer needing to have a star atlas handy to get the precise location. So for example if you are told that a certain comet is in Gemini, you look up and find Gemini the star group in the sky, and that will be roughly where the comet is. --Brian Josephson (talk) 11:36, 3 April 2014 (UTC)

Thank you, Brian. That makes sense, as defining it by celestial coordinates rather than stars allows new discoveries to be unambiguously assigned to a constellation. On the other hand, as stars move in the future, the stars which lay-people consider part of a constellation may no longer be in its coordinate-based one. cmɢʟee⎆τaʟκ 12:11, 4 April 2014 (UTC)

In fact, coordinates change in any case, owing to the precession of the equinoxes. That is a much faster change than that due to the movements of the stars. My first Norton's Star Atlas was 'Epoch 1950' and now I have 'Epoch 2000' -- presumably there was enough change over 50 years for it to be considered good to change the defining epoch. But presumably the constellation boundaries are defined relative to some galactic coordinate system, and are unaffected by precession of the equinoxes, so you will be pleased to know that wikipedia users a century hence will still be able to use your chart! But, as you say, the constellations will look different if we go a million or so years into the future. If you're wondering why astronomers use these funny moving coordinates, by the way, the answer is that they are used to point telescopes in the right direction -- the axis of the earth slowly changes over time, and as telescopes are grounded in the earth corresponding changes have to be made in how they are set.

If I may marginally shift topic, it is often said that the 'year 2000 bug' was overblown. I know of two exceptions to this. One was a telephone service provider that ceased operating early in the year 2000. The evidence pointed to the reason for this being that a year 2000 bug caused them to lose credit card and other customer details so they could no longer bill customers for their phone usage. The other was a computer controlled telescope I had which stopped being able to locate stars after 2000, but could do it correctly if you reset the time to the same date in a previous year. --Brian Josephson (talk) 08:44, 5 April 2014 (UTC)

Thanks for the insights, Brian. I suppose an even smaller effect is plate tectonics! As for the Y2K non-event, I felt at the time that the media response was uncalled for; engineers all around the world including myself spent effort testing and fixing systems so they wouldn't fail. If we hadn't and things went wrong, they would've blamed us for not taking it seriously enough! cmɢʟee⎆τaʟκ 18:19, 7 April 2014 (UTC)

I remember now the pieces of evidence re Y2K. One was that the company informed customers that they had a system problem and you couldn't do something or other until this was fixed. And then they announced they were ceasing their service. The final bit of evidence for my theory (together with the fact that it was not long after the beginning of 2000) was they never collected the amount owing to them for the phone calls made since the last payment!
But I recall another company that ceased some service and tried to keep the money remaining on one's account. When I complained, they said the T&C said that if an arrangement was terminated there would be no refund if the amount in the account was less than £15. Obviously that applied only if it was the customer who wanted to terminate the agreement not them, and sensing I was an awkward customer they refunded the balance in due course. --Brian Josephson (talk) 18:49, 7 April 2014 (UTC)

Moodle site

I have finished the latest version of the VLE site we talked about when we last met. It is at http://moodle.wikimedia.org.uk/. You will only be able to read the front page, but I can create an account if you want one.

There is an index on a wiki page at

https://modulewiki.wikimedia.org.uk/wiki/ModuleWiki:Modules

and the links there will take you to plain text versions of the VLE content. The Moodle site itself has much more (e.g. quizzes): the wiki version is really just to indicate the scope on the open Web. Charles Matthews (talk) 11:28, 3 April 2014 (UTC)

Thanks, Charles. Good coverage on Wikipedia topics! I don't fully understand the relevance of (A), (B) and (C). What's (X), in particular? I also found the list a little hard to read, and made this table: https://modulewiki.wikimedia.org.uk/wiki/ModuleWiki_talk:Modules . cmɢʟee⎆τaʟκ 12:42, 4 April 2014 (UTC)

(A), (B) and (C) are indications of audience: A is introductory, B is the level of everyday editing on Wikipedia, and C is advanced. X is very advanced (expert). These things are explained on the VLE itself in the basic "General Introduction". Charles Matthews (talk) 19:52, 8 April 2014 (UTC)

A barnstar for you!

	The Graphic Designer's Barnstar
	Cool images! Lordakryl (talk) 11:05, 11 April 2014 (UTC)

Thanks, Lordakryl! cmɢʟee⎆τaʟκ 12:15, 11 April 2014 (UTC)

Can you do this?

Please take a look at this suggestion. — Preceding unsigned comment added by UA Victory (talk • contribs) 16:37, 21 April 2014 (UTC)

I'm sorry, UA Victory, but your request is beyond my abilities. I'd suggest just cropping the corresponding area from OpenStreetMap and cite it as appropriate. cmɢʟee⎆τaʟκ 20:09, 21 April 2014 (UTC)

Well thanks for your reply, but the map from OpenStreetMap won't do it because it reflects the current situation. I want the map that shows the historical situation. --UA Victory (talk) 20:26, 21 April 2014 (UTC)

Lego dimensions

New version

Hi Cmglee,

If I understand well, you are the author of the dimensions diagram on the Lego page (https://en.wikipedia.org/wiki/File:Lego_dimensions.svg).

I carefully measured dimensions for the purpose of 3D modelling, and arrive at different values for the diameter of the knobs.

See http://www.cailliau.org/Alphabetical/L/Lego/Dimensions/More%20Dimensions/

as well as

http://www.cailliau.org/Alphabetical/L/Lego/Dimensions/General%20Considerations/

I think the wikipedia image has to be changed. Comments welcome.

Robert. — Preceding unsigned comment added by RobertCailliau (talk • contribs) 10:49, 26 April 2014 (UTC)

Hi Robert,

Excellent work on finding out the dimensions, especially rotating a 1×1 brick 45° to find the stud diameter. While Wikipedia doesn't normally accept original research, I suppose this is the best source I could find, so I'll accept your values.

I don't fully understand why you have 2 sets of outlines: black solid and red dashed ones. Just based on geometry arguments alone, if the stud pitch is 8 mm and stud separation (equal to plate thickness) is 3.2 mm, wouldn't the difference necessarily be 8 - 3.2 = 4.8 mm, unless the stud separation is slightly smaller and they move apart/are compressed when a plate is inserted?

cmɢʟee⎆τaʟκ 15:56, 27 April 2014 (UTC)

Quayside photos

Thanks for the Quayside photos, they're good. I added one to the punt article, sometime I'll add a section about punt touts. Edward (talk) 12:23, 18 May 2014 (UTC)

Titanic passenger article

Looks great! I think probably the only criticism I have for the image itself is that it maybe needs a key? It's hard to see what the little symbols mean. Otherwise, great job! Morhange (talk) 03:55, 28 May 2014 (UTC)

Thanks. I've added a key and made the symbols the same. Better? cmɢʟee⎆τaʟκ 19:04, 28 May 2014 (UTC)

Connection

See my talk page. --Brian Josephson (talk) 18:29, 7 June 2014 (UTC)

Comparison_optical_telescope_primary_mirrors.svg

Comparison of nominal sizes of apertures of some notable optical telescopes

First, I really like the graphic as it shows the size of modern optical telescopes.

I did note one error, the Very Large Telescope (VLT) is not located on Mauna Kea but rather Cerro Paranal in Chile. As a side note, while the Large Binocular Telescope is indeed located in the Pinaleño Mountains, the site is almost always referred to as Mount Graham.

Thanks for your contributions to the community.

Some call me Tim (talk) 16:28, 30 June 2014 (UTC)

Thank you very much for spotting my careless mistake, Some call me Tim. I've corrected it and done a few edits as on the right. Please let me know if you find any more mistakes or omissions. Thanks, cmɢʟee⎆τaʟκ 20:35, 30 June 2014 (UTC)

BTW, Apparently Gizmodo likes your illustration, too. 71.41.210.146 (talk) 02:45, 17 September 2014 (UTC)

And universetoday.com. 71.41.210.146 (talk) 07:53, 15 January 2015 (UTC)

Map of the crash of Malaysia Airlines Flight 17

Recoloured rest of Ukraine

Hi! You wrote:

The map needs labels, especially for the more important dots. I can add them if someone can identify the places (if so, please leave a message on my Talk page).

I can help with it. All the labels are on this map (the crash site map was actually based on an early version of it). Labels are in Russian. If you don't speak Russian, I can help with translation. --Alex1961 (talk) 10:55, 23 July 2014 (UTC)

Thanks, Alex1961. I don't speak Russian, so any help will be appreciated. I think only the major place-names need translation. cmɢʟee⎆τaʟκ 11:13, 23 July 2014 (UTC)

I've added some labels. Please feel free to make any edits. --Alex1961 (talk) 12:22, 23 July 2014 (UTC)

That's excellent! I've made the colour of the rest of Ukraine light orange to make it more distinguishable from that of Russia. cmɢʟee⎆τaʟκ 12:45, 23 July 2014 (UTC)

Sequential colour scale

Hello, do you remember your reuploading of this map? Where you found this colors, and do you help me with this? What's program you used, that generate this sequential color scale. I want use same color scale for another maps, but I don't know what color needed for...em... digit 6. :) I hope you understand me, because I like this color scale. Thanks. ← Alex Great ^talk_rus? 11:48, 31 July 2014 (UTC)

Thanks for the compliment, Alex. I generated the colours by eye and not with a program. A sensible colour for "6" could be #cc00cc. Below is the complete sequence. I've slightly lightened "5" so they can be more easily distinguished. cmɢʟee⎆τaʟκ 15:34, 31 July 2014 (UTC)

0	1	2	3	4	5	6	7

Well, you have a very good color perception. But what happens when the number of wins of any country exceeds 7 times? ← Alex Great ^talk_rus? 02:48, 3 August 2014 (UTC)

Perhaps I just have a good monitor! "But what happens when the number of wins of any country exceeds 7 times?" is a good point. Guess one will just have to come up with another colour. On the other hand, the number of wins is boundless, so there might be a problem sooner or later. Let's cross that bridge when we come to it. cmɢʟee⎆τaʟκ 12:01, 4 August 2014 (UTC)

I totally agree. In any case, it is possible to offer any other scale that, for example, be generated automatically (for example, the same function available in the Microsoft Office Excel). ← Alex Great ^talk_rus? 12:39, 4 August 2014 (UTC)

If you haven't seen a method using the golden ratio, please see this page: http://martin.ankerl.com/2009/12/09/how-to-create-random-colors-programmatically/ I've also been reading about Halton sequences, which can be used to pick a point in 2D colourspace (I don't know how optimal that would be, though). cmɢʟee⎆τaʟκ 18:02, 4 August 2014 (UTC)

Japanese Calendar Image

Regarding the addition of the Japanese calendar to the Gregorian calendar article, since the Japanese use a modified Gregorian calendar it's a bit odd to find it there. Might it be better suited to the Japanese calendar article? JMJimmy (talk) 22:54, 20 August 2014 (UTC)

Considering the language used in the calendar and the author, the calendar was in no way Japanese, except in style (likely for Victorian exotic tastes). cmɢʟee⎆τaʟκ 23:01, 20 August 2014 (UTC)

Actually it was Japanese, see stamp, the publisher was known for producing this style of book in a dozen European languages. They had Japanese artists doing the work and hired prominent foreigners transliterate from Japanese tales/poetry. The colophon in the back of this particular one indicates it was the year Meiji 31. The story itself is about a 3day festival that takes place around the end of February in Japan. JMJimmy (talk) 00:45, 21 August 2014 (UTC)

A barnstar for you!

	The Special Barnstar
	Your illustrations for the fourier series explain it better than no lengthy essay ever could! The world needs more like you! Slashdottir (talk) 20:33, 29 August 2014 (UTC)

Thanks so much, Slashdottir. It's feedback like yours that keep me motivated to continue contributing! I'm glad the illustrations have been a help. Please let me know if there's anything else you think is worth illustrating. Cheers, cmɢʟee⎆τaʟκ 20:56, 30 August 2014 (UTC)

Cambridge meetup 20 September and Wiki Loves Monuments

The next meetup falls during Wiki Loves Monuments. Do you have some good idea of an event we could run in Cambridge related to WLM? Charles Matthews (talk) 10:04, 2 September 2014 (UTC)

There is an automatically-generated map I have just found. Charles Matthews (talk) 16:06, 2 September 2014 (UTC)\

Thanks for your note, Charles. If the weather is fine, I'll be glad to show or accompany anyone around either by bike or on foot.

I suggest a themed tour e.g. the bridges, churches, museums or even sundials in Cambridge.

More conventionally, we can visit and photograph some Grade I listed buildings in Cambridge, or can take a few people into the colleges (say, up to 5). Punting is another option, though that's more social!

Any thoughts? cmɢʟee⎆τaʟκ 20:59, 2 September 2014 (UTC)

P.S. Went on this tour last year and loved it. I can follow roughly the same route if people are interested. (People are responsible for their own safety, bringing their own bikes etc.)

Interesting! Could you fit a tour into two hours, so that it ran for example from a 1 pm rendezvous, to a 3 pm finish at CB2? Charles Matthews (talk) 08:35, 3 September 2014 (UTC)

Would you know if the participants

• Are already familiar with Cambridge, and
• Have bikes?

I can't think of many interesting sites within a short walk of CB2, perhaps except the ARU campus (which I'm not too familiar with) and Parker's Piece (home of football and Reality Checkpoint). Do you have anything in mind? cmɢʟee⎆τaʟκ 23:36, 4 September 2014 (UTC)

I can't say who would come - maybe people from London, for example. That would be one reason to have an event before the meetup itself.

I'm quite interested in monuments in Chesterton. There is Chesterton Tower at https://www.openstreetmap.org/#map=14/52.2099/0.1397 . It is really the same site as Chesterton Abbey, which is one of the listed monuments. There are two photos of the Tower on Commons at present, one from Geograph. This is up to 30 minutes walk from CB2. Charles Matthews (talk) 08:04, 8 September 2014 (UTC)

That's really interesting, Charles. However, I apologise that I've just realised that London Open House falls on the same day and I'll be in London for it. Would you be willing to lead the group in Cambridge? The group can also see the Riverside Bridge, swift tower and Logan Meadow LNR en route. How about meeting at The Haymakers pub which is served by the Citi 2 bus? cmɢʟee⎆τaʟκ 13:14, 8 September 2014 (UTC)

OK, I need to research some more. Thanks for the suggestions. Charles Matthews (talk) 08:29, 10 September 2014 (UTC)

Took some photos of Chesterton Tower... cmɢʟee⎆τaʟκ 23:12, 18 September 2014 (UTC)

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Wikisoba

https://wikimedia.org.uk/wiki/File:Wikisoba_box_diagram.pdf

Cambridge meetup and walk for 8 November

I'm thinking about a shorter walk for the Cambridge meetup. The theme would be Eglantyne Jebb: there is a plaque for her, but I had never noticed it. Charles Matthews (talk) 12:18, 3 November 2014 (UTC)

Thanks, Charles. I hadn't heard of Eglantyne Jebb before reading your note. I'd be glad to join your tour if you decide to run it as her biography sounds interesting. As I suggested at the last tour, do you think more people will come if we have it after the meetup? cmɢʟee⎆τaʟκ 13:59, 3 November 2014 (UTC)

Not in November, I think. I was intending to start at 1.30. Charles Matthews (talk) 16:47, 3 November 2014 (UTC)

Good point. Where does the tour visit, by the way? cmɢʟee⎆τaʟκ 20:53, 3 November 2014 (UTC)

Unfortunately I haven't had time to do preparation, since I have been working on quizzes over the past few days. The plaque is above Hockey's on Regent Street, and really not very obvious. I'd prefer to do that walk another time, therefore. Charles Matthews (talk) 10:38, 7 November 2014 (UTC)

Attribution

Hi, first of all thanks for the great graphs, really nice work. Secondly, I would like to use two of them in my thesis, specifically the "comparison optical telescope primary mirrors.svg" and "Diffraction limit diameter vs angular resolution.svg". How would you like me to attribute them? If you prefer to answer privately my email is pim (dot) messelink (dot) 10 (at) ucl (dot) ac (dot) uk. Messelink (talk) 14:32, 8 December 2014 (UTC)

Certainly, Messelink, and thanks for your compliments and checking back with me — much appreciated! Based on the examples at http://commons.wikimedia.org/wiki/Commons:Credit_line#CC-BY_and_CC-BY-SA_licenses , you could have

© CMG Lee / http://commons.wikimedia.org/wiki/file:comparison_optical_telescope_primary_mirrors.svg / CC-BY-SA-3.0
© CMG Lee / http://commons.wikimedia.org/wiki/file:diffraction_limit_diameter_vs_angular_resolution.svg / CC-BY-SA-3.0

If you wouldn't mind and it's publicly accessible, I'd love to see how you've made use of them in your thesis :-) Ta, cmɢʟee⎆τaʟκ 03:55, 11 December 2014 (UTC)

Oh that actually helps a lot, much appreciated! At the moment it seems likely that the thesis will be embargoed for a few years because of an external sponsor, sorry about that! It is still being discussed so if things change I will be sure to let you know! Thanks again, Messelink (talk) 19:55, 11 December 2014 (UTC)

Aurora

Schematic of Earth's magnetosphere

Hi Cmglee, Editors of the Aurora page have been looking for someone to draw a three-dimensional schematic of the earth's magnetic fields to help describe the phenomena. As you'll see, the page currently includes the 2-D schema below. I'm sure I've seen something like this somewhere. I wonder if this is something that would interest you. The phenomena is so visually appealing that it really deserves a good schematic to match its intrinsic beauty. BakerStMD T|C 02:07, 30 December 2014 (UTC)

Hi Bakerstmd, It would be a pleasure for me to draw it, but I'm not familiar with the aurora's 3D shape. Do you have an image from a reputable publicly-accessible online source I can base it on? Thanks, cmɢʟee⎆τaʟκ 02:11, 30 December 2014 (UTC)

I found http://www.astronomynotes.com/solarsys/s7.htm and the thumbnail at right, neither of which are perfect, but which give a sense of the sort of thing that you might draw. I did a google image search and found lots of images of the shape, but none of them are a perfect 3-D image. I'm not an expert on this field and I'm sorry I can't advise you better. Hope that helps. BakerStMD T|C 16:47, 30 December 2014 (UTC)

Hi again, If you don't mind, I've moved the thread to Talk:Aurora#3-D_type_Picture_of_the_auroral_doughnut_needed. to keep it with the anonymous user's original request. Note that it's quite old, so I'm unsure if anyone's still monitoring it. cmɢʟee⎆τaʟκ 14:10, 31 December 2014 (UTC)

P.S. I recoloured the Van Allen belt graphic, by the way...

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≤ 2O1O	2O11	2O12	2O13	2O14	2O15	2O16	2O17	2O18	2O19
2O2O	2O21	2O22	2O23	2O24