tag:blogger.com,1999:blog-2433841880619171855.post8373912030574457177..comments2024-03-27T21:09:44.320+00:00Comments on Pat'sBlog: Moving West, WCYDWTUnknownnoreply@blogger.comBlogger12125tag:blogger.com,1999:blog-2433841880619171855.post-50188854084375268852011-02-27T02:03:47.507+00:002011-02-27T02:03:47.507+00:00Nicely tied together! Given n villages, we can ma...Nicely tied together! Given n villages, we can make them each the midpoint of one side of an n-gon, and actually find the vertices of the n-gon.<br /><br />Everyone's in the middle of something!<br /><br />JonathanAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-52669807821707508892011-02-26T16:03:08.644+00:002011-02-26T16:03:08.644+00:00I should have said Strange attractor or just plain...I should have said Strange attractor or just plain <a href="http://en.wikipedia.org/wiki/Strange_attractor#Strange_attractor" rel="nofollow">Attractor</a>, attractors themselves being a subset of Chaos theory in Maths, which I prefer calling Order-in-Chaos Theory, because that's more descriptive. ;-)<br /><br />Order-In-Chaos is so bleeping young and fascinates me endlessly. I don't know but I think there aren't enough attempts to incorporate it into fundamental Physics, although I heard there were early attempts with mixed results. <br /><br />But those were early! The whole field is young (Edward Lorenz came up with his attractor in 1963 for example) and there's much work to be done. One of my (too many) dreams is to get up to speed and possibly help out in that regard someday. Hey, if you know of a great blog on Chaos then do tell, and I'll add it to my feed.<br /><br />I was also thinking of it in terms of European population shifts, with its much longer history than that of America's, I suspect Europe's tended to move around quite a bit, unlike the USA's straight-ish line.<br /><br />America's is very cool, though. Note the way it deviates very little from North to South, and looks pretty steady from East to West. That makes sense when you consider the twin origins of our EuroPopulation having been Plymouth and Jamestown. I was surprised though that it holds so steady.<br /><br />I think in the future you'll be seeing it turn to the Southwest quite a bit, as Americans are drawn in waves to the Southern Cali to Texas region. Very nice climate, and very dry so there's little humidity as in Florida. The older we get the less we like humidity, and with the Boomers retiring or about to, I expect the 2020 shift will be greater yet.Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-21139127429702826472011-02-26T15:57:16.920+00:002011-02-26T15:57:16.920+00:00This comment has been removed by the author.Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-39027948510428670332011-02-26T13:28:27.461+00:002011-02-26T13:28:27.461+00:00Following your addendum and reader's comments,...Following your addendum and reader's comments, I got interested in all this. There seems to be a whole statistical branch in geography that studies the average displacement on maps. Google scholar "centrography" or related terms returns a wealth of papers on this subject.<br /><br />Likewise the US population, in Quebec, the population migrated south-west between 1951 and 1971, source: figure 5 of pdf <a href="http://www.erudit.org/revue/cgq/1974/v18/n45/021221ar.pdf" rel="nofollow">Analyse centrographique de la population du Québec de 1951 à 1971</a>. This paper also shows how such barycentric methods depend on the Pythagoras relation.<br /><br />In Europe, there are a lot of little villages who boast to be the geographic centre of something (European union, Euro zone...), but I didn't find much data on population barycentres. The reason for that must be indeed that the data come from a variety of national and regional census sources, who don't count at the same dates. This should however be a strategic factor for the place of settlement of companies who aim to be near to their customers.<br /><br />@Steven. You talk about Lorenz attractor. This made me think that physical forces are used as models to investigate such shifts of populations. Economic attraction and potential, cultural attraction, diffusion into open spaces, political forces and revolutions, wars, peace, weather, natural disasters ...Arjen Dijksmanhttps://www.blogger.com/profile/09450431291713605237noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-54566846202025625842011-02-26T07:40:01.340+00:002011-02-26T07:40:01.340+00:00Peak Southern and Eastern European immigration was...Peak Southern and Eastern European immigration was in the 1890s. <br /><br />The Chinese exclusion act is 1880 something.<br /><br />But that feels thin. Anything else?<br /><br />JonathanAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-1802115093008353082011-02-25T20:18:25.581+00:002011-02-25T20:18:25.581+00:00JD,
Interesting conjecture... I had no idea...JD, <br /><br /> Interesting conjecture... I had no idea, but when I went to check, the decade from 1891-1900 was smaller than the ten year period on either side of it...<br /> 1881-90 5,246,613<br /> 1891-00 3,687,564<br /> 1901-10 8,795,386<br /><br /> Anyone have any suggestions?Pat's Bloghttps://www.blogger.com/profile/15234744401613958081noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-31738876703860726402011-02-25T20:17:25.976+00:002011-02-25T20:17:25.976+00:00This comment has been removed by the author.Pat's Bloghttps://www.blogger.com/profile/15234744401613958081noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-75694711248712397682011-02-25T16:47:19.666+00:002011-02-25T16:47:19.666+00:00Hi Pat,
A few years ago I wrote an article abou...Hi Pat,<br /> A few years ago I wrote an article about a Calc II lab that I wrote for finding centers of the US—geographic and population. If you're interested, you can find it here: "Centers of the United States," The College Mathematics Journal, 36 (November 2005) No. 5, 366–373. If you don't have access to the CMJ and would like a copy, just let me know.<br /><br />DaveDavehttps://www.blogger.com/profile/11396416443532916086noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-74065197998486699242011-02-25T16:36:11.377+00:002011-02-25T16:36:11.377+00:00We can add population in one place, we can remove ...We can add population in one place, we can remove population in one place, or we can move population from one place to another.<br /><br />It would be interesting to associate individual pairs with one of these phenomena. For example, 1890-1900 shows a very small move west, probably due not to major changes in internal migration, but to a massive surge in immigration to the Northeast.<br /><br />JonathanAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-3131603186303103472011-02-25T15:24:44.161+00:002011-02-25T15:24:44.161+00:00GOOD Question, Arjen. How long have those places h...GOOD Question, Arjen. How long have those places had Censuses?<br /><br />But why stop there? How about South America, Europe, Africa, and Australia?<br /><br />Canada? Probably does a Lorenz attractor thing between Montreal and Toronto, starting out east of Montreal, maybe Halifax, and ends well west of Ottawa, but still within 100 miles of the American border at all times.<br /><br />China? I am bad on Chinese history, so wild guess: centers around Shanghai for most of their history before heading west.<br /><br />Russia? Probably starts in Khazaria, which is now Chechya, then goes north and west until it's well west of Muscovy and north of Kiev, and is probably a complete mess after that. Unlike the Russians themselves, of course.<br /><br />Europe? I'm kind of doubting it ever leaves Switzerland or northern Italy, after an initial start around Thrace, but I'm just guessing. <br /><br />( btw Pat, I have the proof by (allegedly) Theaetetus' that there are only 5 regular polyhedra up on my blog today. )Steven Colyerhttps://www.blogger.com/profile/10435759210177642257noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-76152084864970613412011-02-25T09:51:58.865+00:002011-02-25T09:51:58.865+00:00Arjen,
I know the French have stopped a periodic ...Arjen,<br /> I know the French have stopped a periodic count of the total populaiton. I'm not sure if the new annual counts are regional in nature or if they use some kind of sample to estimate... are you aware? I know here in England they have a census day every ten years (it's next month in fact)...maybe even I will get to play.Pat's Bloghttps://www.blogger.com/profile/15234744401613958081noreply@blogger.comtag:blogger.com,1999:blog-2433841880619171855.post-44413531753804941842011-02-25T07:43:23.791+00:002011-02-25T07:43:23.791+00:00Interesting, especially about the rate of progress...Interesting, especially about the rate of progression every decade with respect to the historical events. I wonder if such population center maps are also available for other countries, like China, Russia or Canada.Arjen Dijksmanhttps://www.blogger.com/profile/09450431291713605237noreply@blogger.com