User talk:Vermeer~enwiki

Hi and welcome to wikipedia. I just wanted to say cool drawing! Image:VenusTransitVermeer.png I actually intended doing something similar myself, but you've made such a nice job of it I don't have to. theresa knott 14:52, 8 Jun 2004 (UTC)

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Thanks Theresa, appreciated.

Actually I've been drawing quite a lot of stuff, just not on Wikipedia. I'm amazed that you use Word for drawing... I've been using xfig forever, it has a horrible UI but is extremely powerful.

Have a look at my lecture notes for more examples... anything you would like to see on Wikipedia?

Vermeer 15:40, 8 Jun 2004 (UTC)

Nice! You'd be the best person to judge what could go in wikipedia though (I only speak english so i couldn't read the notes to work out what the diagrams were). I'm sure anything you add would be appreciated, though. theresa knott 09:00, 14 Jun 2004 (UTC)

Radius of curvature

Greetings Prof. Vermeer! I saw your Reference ellipsoid edit from last year, adding the "M" and "N" radii of curvature: I have seen it written that "the radius of curvature at Lat, in the direction Az" is

${\frac {1}{{\frac {\cos(Az)^{2}}{\operatorname {M} (Lat)}}+{\frac {\sin(Az)^{2}}{\operatorname {N} (Lat)}}}}\,\!$

Does this radius of curvature/arcradius have a particular name (like "M" is the "meridional" and "N" is the "normal" or "transverse equatorial")? This doesn't seem to be the omniversal arcradius, though, which I believe is the "transverse meridional" arcradius (i.e., the arcradius at a point on, in the direction of, a "great circle"):

${\frac {1}{\sqrt {\left[{\frac {\cos(Az)}{\operatorname {M} (Lat)}}\right]^{2}+\left[{\frac {\sin(Az)}{\operatorname {N} (Lat)}}\right]^{2}}}}\,\!$

Is there another name for this arcradius (I can't find it discussed——or even ackowledged——anywheres)? I made an inquiry at the Reference Desk a couple of months ago, but didn't get any satisfactory reply (see: arcradius inquiry).  ~Kaimbridge~22:34, 31 December 2005 (UTC)

(Respones have transpired via e-mail) ~Kaimbridge~00:41, 2 January 2006 (UTC)

Your account will be renamed

Hello,

The developer team at Wikimedia is making some changes to how accounts work, as part of our on-going efforts to provide new and better tools for our users like cross-wiki notifications. These changes will mean you have the same account name everywhere. This will let us give you new features that will help you edit and discuss better, and allow more flexible user permissions for tools. One of the side-effects of this is that user accounts will now have to be unique across all 900 Wikimedia wikis. See the announcement for more information.

Unfortunately, your account clashes with another account also called Vermeer. To make sure that both of you can use all Wikimedia projects in future, we have reserved the name Vermeer~enwiki that only you will have. If you like it, you don't have to do anything. If you do not like it, you can pick out a different name. If you think you might own all of the accounts with this name and this message is in error, please visit Special:MergeAccount to check and attach all of your accounts to prevent them from being renamed.

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Sorry for the inconvenience.

Yours,
Keegan Peterzell
Community Liaison, Wikimedia Foundation

03:31, 20 March 2015 (UTC)

Renamed

This account has been renamed as part of single-user login finalisation. If you own this account you can log in using your previous username and password for more information. If you do not like this account's new name, you can choose your own using this form after logging in: Special:GlobalRenameRequest. -- Keegan (WMF) (talk)

20:13, 22 April 2015 (UTC)