Re: analemmatic sundial
Thank you. I forgot to specify that it needs to be able to run on osx On Mon, May 1, 2023 at 4:00 PM Kurt Niel wrote: > Hi Donald, > > www.helson.at > > A very supportive SW with a lot of different types of sundials! > > Kurt > > Donald Christensen schrieb am Mo., 1. Mai > 2023, 07:44: > >> I’m looking for a program to calculate an analemmatic sundial. Can >> anybody help? >> >> Cheers >> Donald Christensen >> 0467 332 227 >> >> If you focus on what you lack, you'll lose what you have. If you focus on >> what you have, you gain what you lack. >> --- >> https://lists.uni-koeln.de/mailman/listinfo/sundial >> >> --- https://lists.uni-koeln.de/mailman/listinfo/sundial
analemmatic sundial
I’m looking for a program to calculate an analemmatic sundial. Can anybody help? Cheers Donald Christensen 0467 332 227 If you focus on what you lack, you'll lose what you have. If you focus on what you have, you gain what you lack. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Analemmatic sundial
I want to design a garden with an analemmatic sundial for the Toowoomba flower festival. This is a yearly competition in Australia where residents open their gardens to the public. The flower festival is how it sounds. There are many flowers. These gardens are not the usual gardens. They're more of a flower display. The more flowery the more likely they'll win the competition. I want to offer to design a sundial to be entered in the flower festival. The trouble is, I need examples of sundials in BEAUTIFUL gardens. Most analemmatic garden sundials are in a plain looking garden. Please send me human sundial photos in gardens. The more beautiful the garden the better. Cheers Donald Christensen 0467 332 227 If you focus on results, you will never change. If you focus on change, you will get results. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
happy new year
Our calendar. https://www.youtube.com/watch?v=WZXnSF-hO-A Cheers Donald Christensen 0467 332 227 If you focus on results, you will never change. If you focus on change, you will get results. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Calendar history moon Gregorian Julian
https://www.youtube.com/watch?v=mk4n7XWsY_4 Cheers Donald Christensen 0467 332 227 If you focus on results, you will never change. If you focus on change, you will get results. --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Permanent DST
I live in sunny Queensland. There are more problems with DST than fading curtains. All that extra sunlight makes the water in our lakes evaporate faster! We can't afford to lose all that water. It also breaks up marriages becuse DST messes up the times when the couples feel romantic. Cheers Donald Christensen 0423 102 090 If you focus on results, you will never change. If you focus on change, you will get results. On Sun, Nov 20, 2016 at 9:40 AM, John Pickard <john.pick...@bigpond.com> wrote: > Good morning from sunny Sydney, > > If you think that Europe has a problem with DST, you should try Australia > which can only be described as a dog's breakfast. Queensland steadfastly > refuses to go on DST because the extra couple of hours of daylight fades > the curtains. Although we have a nominal three time zones (AEST, ACST, > AWST) there are a couple of towns / villages with times artificially set to > be outside the zones they live in. This was originally for commercial > reasons, making it easier to do business in adjoining states. These days, > such changes are pointless and unnecessary with the internet, but seem to > be retained for no particular reason other than to be different. On top of > this is DST in various states. As a consequence in summer you can meet more > than five different times in Australia which means that on a long trip you > can spend a lot of time changing the clocks in cameras, etc. > > Most of us in the southern states like DST (regardless of its effect on > our curtains!) and look forward to it at the end of winter. Equally, we > don't like when it ends. > > Of course the funniest thing about DST are the arguments of opponents who > seem to think that the 24 hour clock is some immutable thing handed down > from the gods, rather than a convenient human construct. And if you change > the time, then the world as we all know it will come to a shuddering end. > These people simply don't understand that the only thing that changes is > the "time" you get out of bed. Although I mostly work from 0700 to 1800 or > thereabouts, I have done fieldwork in Antarctica and Patagonia where we > changed to later starts and finishes because of the extreme winds in the > morning. Why start at 0700 and get hammered by wind all morning when you > can start at 1200 (when the wind has died down), and work the same number > of hours through the afternoon and evening relatively wind-free? So we had > breakfast at 1100, hit the ice at 1200 and worked through until about 2200 > with almost no wind. Of course, this is only really feasible in high > latitudes in summer with very extended daylight hours. But it does show > that "time" as shown on a clock face is often irrelevant. > > > Cheers, John > > John Pickard > john.pick...@bigpond.com > > -Original Message- From: Isabella McFedries > Sent: Saturday, November 19, 2016 4:02 PM > To: sundial@uni-koeln.de > Subject: Re: Permanent DST > > > In message <CACOUaYqB2vmbu9L9Tcs9BSv_YQmn-WsVEuL89cX9k9RACyTimA@mail. > gmail.com> > Dan-George Uza <cerculdest...@gmail.com> wrote: > > Dear group, >> >> We are witnessing a few interesting developments! After Turkey decided a >> few months ago to remain on Daylight Saving Time all year round, Hungary >> is >> now considering to do the same. >> >> http://www.seattletimes.com/nation-world/hungary-mulls-stayi >> ng-on-daylight-saving-time-all-year-round/ >> >> If the measure passes, neighboring countries Hungary and Romania will >> share >> the same official time for half of the year although they are located in >> different time zones (CET and EET respectively). For eastern Hungary the >> sun sets at about 15:40 during winter, i.e more than an hour ahead of >> Paris, which shares its time zone. >> >> I'm wondering: aren't EU member states supposed to equally follow DST by >> law? >> >> >> Dan Uza >> > > > Hi, Dan > > You are PARTLY correct - but (as I understand it), all EU member countries > must CHANGE their clocks on the SAME date, although they still keep their > individual Time-zones. For example, UK and Ireland are on GMT, whereas > France/Germany are on CET, and countries such as Greece on CET + 1 hour. > > There are other examples of locations which are on PERMANENT 'Daylight > Saving' time - for example here in Canada, the province of Saskatchewan > should really be in the 'Mountain' zone (GMT-7), but always STAYS in the > 'Central' zone (GMT-6) and so does NOT change its clocks twice a year. > > I am afraid that these things are always for the Politicians to decide! > > > Sincerely, > > Isabella McFedries. > > > -- > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: How wrong is your time zone: Map shows how far world clocks are from solar time
I love that time zone map! does anyone know where I can download the jpeg file? Cheers Donald Christensen 0423 102 090 www.fotoresumes.com <http://www.fotoresumes.com> This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! On Sun, Oct 25, 2015 at 9:22 AM, Steve Lelievre < steve.lelievre.can...@gmail.com> wrote: > On 24/10/2015 15:22, Dan-George Uza wrote: > >> >> >> http://www.slate.com/blogs/the_world_/2014/02/21/how_wrong_is_your_time_zone_map_shows_how_far_ahead_or_behind_the_world.html >> >> Are you aware of any territories following official solar time? >> >> >> > Interesting question for which I do not know a definite answer, but I > guess it would depend on how wide the territory is. If true solar time was > used, then the West of the territory is going to run a different time to > the East. Perhaps you could standardise country wide by using, uh, a time > zone centred on your capital city. Greenwich to Trafalgar Square isn't very > far so can we treat the UK as using a timezone based on noon in its > capital? Not during Daylight Savings, though. As well, from the map you > cited, Guyana look like it's fairly well centred to its natural noon. > > For genuine local solar time, I'd like to think that there are indiginous > peoples left in some parts of the world who don't need to live by the > clock, rising with the dawn and bedding down with dusk. > > Steve > > --- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Can I share Universal Analemmatic Sundial image?
You can have my movies if they would be any help https://www.youtube.com/watch?v=oNMxIbrVCVw https://www.youtube.com/watch?v=eSPX5sjVYBc Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! On Fri, Jul 3, 2015 at 6:37 AM, Michael Ossipoff email9648...@gmail.com wrote: Roger and Patrick: (addressed separately below) Roger-- Thanks for the answer. I wanted to find out what NASS permits. It permits, in the case of the Universal Analemmatic sun-compass image, sending 1 copy to any of 1 or more individuals, but it doesn't permit posting an image to forums. That's what I wanted to find out. In a week or a few weeks, I'll ask, here, if it's permissible to post, to a forum, a link to a NASS webpage that has an image of the Universal Analemmatic sun-compass...and, if so, what URL to link to. I won't ask that question today, because I've already asked a question and gotten an answer today. Michael Ossipoff Patrick-- Thanks for the reply. You wrote: Far better to contact the author, (or here NASS) to get permission for what you want to do [endquote] Yes, and that's what my posting was doing Though I didn't write directly to official NASS e-mail addresses, I knew that NASS's representatives could be reached at this forum. Michael Ossipoff --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Deltacad
For years I have been using Autocad. I now want to start Deltacad and in particular writing macros. I need an example of a macro that will read from a .csv file Does anyone know where I can get such an example? Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Deltacad
Thank you for that. It's a start. However I want to plot points. The x and y coordinates for these points will be written on a csv file. I want this macro to read the csv file then use these x and y values to plot the points in Deltacad. The macro that you showed me converts the csv table and makes the table into a Deltacad drawing. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! On Sun, Jun 7, 2015 at 11:51 AM, Dave Bell db...@thebells.net wrote: You might check this one out: http://www.deltacadusersgroup.org/Forums/archive/index.php?thread-158.html And search here: http://www.deltacadusersgroup.org/macrospage1.html Dave -- *From:* sundial [mailto:sundial-boun...@uni-koeln.de] *On Behalf Of *Donald Christensen *Sent:* Saturday, June 06, 2015 6:34 PM *To:* Sundial mailing list *Subject:* Deltacad For years I have been using Autocad. I now want to start Deltacad and in particular writing macros. I need an example of a macro that will read from a .csv file Does anyone know where I can get such an example? Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Deltacad
I have just installed Deltacad and am learning how to use it. One question that I have is: How do I change the default directory? I want Deltacad to always look in and save to d:\d deltacad Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Deltacad
I'm running windows 7 Can I set deltacad to remember a certain directory? Or will it simply remember the last one? Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! On Sat, Nov 15, 2014 at 1:57 PM, illustratingshadows illustratingshad...@yahoo.com wrote: what operating system and release level? deltacad and windows 8.1 remembers the last macro folder, but not in windows 8 at least that is what I experienced. simon Sent via the Samsung Galaxy Alpha™, an ATT 4G LTE smartphone Original message From: Donald Christensen dchristensen...@gmail.com Date:11/14/2014 19:02 (GMT-07:00) To: Sundial mailing list sundial@uni-koeln.de Subject: Deltacad I have just installed Deltacad and am learning how to use it. One question that I have is: How do I change the default directory? I want Deltacad to always look in and save to d:\d deltacad Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: sundials in schools
Gino I do it the same way. However, as you can tell by my website, I'm trying to make sundials so simple that young school children can understand them. I've tried to simplify things as much as I could. A 3rd grade class installed one of my sundials. I'm trying to think up an easy way for a class as young as first grade could make a sundial. Such as a very simplified website that says 1. Find your longitude and latitude by placing the point on this world map 2. Print out the PDF of the sundial that has been generated from the coordinates that you entered 3. Assemble the sundial 4. rotate it until it shows the correct solar time 5. Solar time can be found by setting your watch to the time on this website. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! On Sun, Jul 6, 2014 at 5:32 AM, GINO SCHIAVONE schiavon...@msn.com wrote: Greetings Donald, One of the ways I like to find north is to determine the latitude and longitude of a location with Goggle Earth (to Goggle Map). Then I enter that information in the NOAA Sunrise/Sunset Calculator at http://www.esrl.noaa.gov/gmd/grad/solcalc/sunrise.html which will tell me the time of Solar Noon on any particular date. Armed with this information I can use a plumb-bob over a point and mark a second point on the shadow of the plumb-bob string at solar noon the moment the sun is southing. A line drawn between these two points is a north-south line. A long way around the barn, but rather fun. Sunny hours, Gino Schiavone Gino Schiavone The Schiavone Studio 1337 Gusdorf Road, Ste J Taos, NM 87571 575-758-7797 575-613-0943 -- Date: Sat, 5 Jul 2014 10:23:29 +1000 Subject: sundials in schools From: dchristensen...@gmail.com To: sundial@uni-koeln.de I would also love to see sundials in schools. Not just an analemmatic dials but the multi dial as well. This is why I am trying to find an easy way to find north. I would like to be able to use a horizontal dial and rotate it until it reads the true time. Obviously this won't work with a standard horizontal dial because we are not all on the same longitude. The other reason is the equation of time. However, I believe it would work if there was a website that calculate setting your watch to LAT instead of LMT. This website would have to take in account the longitude as well as the day of the year it is. You then rotate the sundial until it is the correct time on your watch. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
sundials in schools
I would also love to see sundials in schools. Not just an analemmatic dials but the multi dial as well. This is why I am trying to find an easy way to find north. I would like to be able to use a horizontal dial and rotate it until it reads the true time. Obviously this won't work with a standard horizontal dial because we are not all on the same longitude. The other reason is the equation of time. However, I believe it would work if there was a website that calculate setting your watch to LAT instead of LMT. This website would have to take in account the longitude as well as the day of the year it is. You then rotate the sundial until it is the correct time on your watch. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: A world map of the discrepancy between civil and solar time.
Love it! This affects everybody in the world that travels. I can't believe there are not more maps like this. I was born in California and moved to Brisbane Australia at 22. The time difference was quite a shock. Months later (when most change to Daylight Savings time) the shock was even bigger because Queensland doesn't have DST. On a side note, shortly after I arrived, Qld was debating to bring in DST. The eventually brought it in. There was a small revolution so they decided to never do it again. I enjoyed listening to the arguments against DST such as, With all that extra sunlight, our lakes will evaporate faster! or It will make our curtains fade and It will confuse milking cows. The best one I heard was on a radio. A woman said that her and her husband make love every morning. However if they bring in DST, he won't be in the mood until he's on his way to work! Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! On Sat, Mar 8, 2014 at 7:03 AM, Steve Lelievre steve.lelievre.can...@gmail.com wrote: Hello everyone, Some fellow has coloured a world map to show the difference between the time zones and local solar time worldwide. See http://poisson.phc.unipi.it/~maggiolo/index.php/2014/01/ how-much-is-time-wrong-around-the-world/ Click the small map on the this blog to see the map in full screen. It look like he's done it using Standard Time rather than Daylight Saving. I live in New Brunswick, Canada. We're slightly pink. Steve --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Information wanted, on 'badly designed' public sundials
Reena I know nothing about the sundial in the photo that you sent. However I suspect design changes during turning a good design into a bad one. I'm a design draftsman of 20 years. I'm very familiar how a good design goes bad. Often, design change decisions are made by a committee or budget adjustment and not the designer. Draftsmen often get forced into making a bad design by people that have little design experience. I suspect that's the case because a raised marker so low to the ground is such an obvious trip hazard that I don't believe it was originally designed that way. I imagine the hour markers were going to be at least 300 mm tall Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! On Fri, Oct 25, 2013 at 12:46 AM, Reena Gagneja reenagagne...@gmail.comwrote: Dear List Members (especially in UK), I am intending to compile a list of sundials, in public places - which people do NOT like, either because it is inaccurate or badly designed. Does anyone have further information on this 'Analemmatic' layout, at Colne (see attached photograph) - in terms of the Client, or Designer? I have managed to establish that the component-parts were supplied by a company (in Yorkshire), named Fosstone - but I would like to know who 'commissioned' it, or designed the layout of the stone pieces. All I have been able to find on the internet are basically negative comments about it - being a waste of public money, an obstruction, danger to pedestrians, etc. Why would anyone create such a feature which is not 'vehicle-friendly', and potentially dangerous if people were to trip on it? Why not simply set all its parts 'flush' with the ground-level, instead of having that central section raised up? Apart from anything else, the cost would have been much reduced. With my thanks, in advance - for any further information, on this. Sincerely, Reena Gagneja. -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Arabic Numerals
Thank you all I include pdf stencils for my sundial. The children print out these, tape them together, cut out holes in them, and paint through the holes. They then lift off the pdf and use the painted dots as a guide to paint numbers (or spell out months) on the ground. It the moment I offer the hours as A small font ( about 4) inside a circle A bigger font with a point that marks And a very large font (to be spray painted on grass for a temporary sundial) I will now include hour marks in Greek, Roman, and Arabic. Does anyone have these fonts as letters so that I can spell out the months? I will also write a brief history about each font in a simple format that school children can read. I also explain the analemmatic sundial in a simple format that 10 year old children can understand but without simplifying it so much that I give false information. I think I have the right combination. (not too simple but not too complicated) I would like your feedback. Gianni Would you help me write outline of the Arabic font that young children can understand? http://content.screencast.com/users/dchristensen777/folders/sundials%20for%20learning/media/442d45a5-a6b2-4e6d-a9fa-73feadad0f64/stencils%20preview.jpg http://content.screencast.com/users/dchristensen777/folders/sundials%20for%20learning/media/f56e75ac-5890-419e-8e10-d0bc54d13f0e/640-size-painting%20a%20number%20stencil%20part%201.jpg http://content.screencast.com/users/dchristensen777/folders/sundials%20for%20learning/media/14424328-0873-4f35-a8b6-606fb18fdb1b/640-size-painting%20a%20number%20stencil%20part%202.jpg Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com On Thu, Aug 22, 2013 at 11:41 PM, Gianni Ferrari gfme...@gmail.com wrote: Bob and Simon (and others who are interested) For what concerns the numbers in Arabic on sundials, should be noted that in many old sundials the hours are written using the old Abjad notation I attach a table taken from my book with an example. The numbering system called abjad was used in Muslim countries before the introduction, in the ninth century, of the Hindu-Arabic modern system. Later the two systems were often used together until modern times. In this system, to the 28 letters of the alphabet are assigned numerical values of the units, tens and hundreds, according to a particular order and can be written integers from 1 to 1999. A special feature of this system of writing is that the letters which represent a given number can be written in any order. Numbers written in Abjad are written from left to right (see example attached) while the modern Arabic numbers are written from right to left, that is in the opposite direction to the common text in Arabic. For example there are numbers written with this notation in the sundial of St. Sofia Mosque, in those on the walls of the New Mosque, or Yeni Cami, in Istanbul, in the horizontal dial that is in the museum of the city of Konya, on the sundial engraved on a column at Tlemcen in Algeria, etc.. The book, written in Turkish, Osmanli Gunes Saatleri on the Ottoman sundials is unfortunately sold out: I received from the author, Prof. Nusret Cam, the last 3 copies a few years ago. For what concerns the Ottoman and Islamic sundials, I think the only text, currently available, that fully describes their characteristics andthe construction methods, is my book “Le meridiane dell’antico Islam” ( The sundials of ancient Islam ). It is written in Italian language, certainly much easier and understandable than Turkish :-) For some news about this book see in: https://dl.dropboxusercontent.com/u/6616660/ISLAMIC%20SUNDIALS_Some%20pages.pdf https://dl.dropboxusercontent.com/u/6616660/ISLAMIC_SUNDIAL_Note.pdf Best wishes Gianni Ferrari 2013/8/21 Simon [illustratingshadows illustratingshad...@yahoo.com May I add that 4 also has some different depictions, the Persian form of the 4 is a more logical extension from 2, and 3. Also there are variations of the 5. http://www.illustratingshadows.com/dialLettering.JPG Simon Simon Wheaton-Smith www.illustratingshadows.com Phoenix, Arizona, W112.1 N33.5 -- *From:* Robert Terwilliger b...@twigsdigs.com *To:* sundial@uni-koeln.de *Sent:* Wednesday, August 21, 2013 10:14 AM *Subject:* Arabic Numerals A clockmaker friend came up with a graphic of Arabic numerals and their pronunciation. I thought it might be useful to those on this list. http://www.twigsdigs.com/annex/Arabic-numbers0-9.jpg Bob Robert Terwilliger Certified Master Clockmaker 2963 Bird Avenue Coconut Grove FL 33133 305-447-4619 Map to my home shop http://www.twigsdigs.com/repair/map.html --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
sloping analemmatic sundial
I have developed an Analemmatic sundial on a slope. In the photo, the dial slopes both north/south and east/west. I've tested the accuracy against a clock. It works. Now I want to make a large one. I'm offering to make a sloping sundial of human involvement. I'll do this free of charge. If you want one or know of someone that would be interest, please contact me. http://content.screencast.com/users/dchristensen777/folders/sundials%20for%20learning/media/b99413f6-82a1-499f-9f7d-9e7c0c5a63d6/DSCF2538.JPG Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundials in schools
Thank you all for your wonderful feedback. I'm slow to reply because I only recently figured out how to get the sundial mailing list off the spam list. Gmail mad 'improvements' to their spam filter and they believed the SML to be spam. However it did not visually put it on the spam list so it would not give me an option to remove them from the spam list. I got them off by adding them to 'my contacts' As far as the testimonies, Only half of them are genuine. To be honest I forgot about them and regret not taking the false ones down. I put them up as I was laying out my webpage. I have taken off the false ones. Most all teachers that see my sundial like it. However they don't have control over what the school sets aside for their curriculum or what they have time for. I try to explain that It does not need to be constructed by the children. However, I sound like a telemarketer. I'm a draftsman. I feel like a fish out of water when it comes to selling. I'm looking for educational marketing companies that will sell on commission. If anybody knows of any please contact me. My efforts so far have been to approach schools directly in an attempt to give away my sundials. I knew my website needs photos of children. I'm a terrible salesman and the results discouraging. About year ago, (shortly after I had the w3c errors fixed) I started running into financial hardship and stopped spending on things like SEO. I have a better google ranking now that I made my website mobile phone friendly but I haven't spent anything on SEO. I would welcome any help on SEO. My website still sometimes has a problem when viewed from Internet Explorer I have build a small scale sloping sundial. After a few preliminary test trials, I'm about 80% certain that my sloping sundial will work. I need to talk to a surveyor to work out how to communicate/describe the slope and how to tell people how they can construct it off my dimensions. I will design a sloping sundial at no cost Donald Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com On Sun, Jul 28, 2013 at 12:27 AM, John Carmichael jlcarmich...@comcast.netwrote: A simple method of laying out a human analemmatic has just occurred to me. 1. Make a true to scale design drawing of the sundial with the Time Marks and the Solar Noon Mark on the ellipse. 2. Measure the distance along the ellipse from the Solar Noon Mark to an adjacent Time Mark. Then measure the distances between each Time Mark along the ellipse. 3. Find True North at the construction site. 4. At the construction site, mark the East/West and North/South cross lines that pass through the center of the date line (the center of the ellipse) 5. draw the ellipse on the ground using the simple line and pin method. See: https://www.youtube.com/watch?v=7UD8hOs-vaI 6. Using your drawing, simply measure and mark the distances between the Time Marks on the ellipse. Hint: If you use a flexible ruler or measuring tape, you can accurately measure the distances between the Time marks on the curve of the ellipse. This lay out method avoids the use of x/y coordinates or angle measurements. Simple! -Original Message- From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Roger Bailey Sent: Friday, July 26, 2013 9:48 PM To: Robert Kellogg; sundial@uni-koeln.de Subject: Re: Sundials in schools Hi Bob and Donald, I have done the same when an interest is expressed to NASS or to the SML. I routinely send people the basic design information, generally as a spreadsheet with x y data and charts. These requests are from individuals, schools and Eagle Scouts. A minority result in the construction of a dial. This information is offered to encourage people to construct a dial. These offers of information are not in competition with commercial products like Sunclocks but are encouragement to people to explore the possibilities for their specific location. The technology exists to define a dial. The challenge remains the artistic expression. How can the designer bring to life this known 2 dimensional definition of lines on a surface? There is the challenge and the opportunity. My own examples are dials 666 and 668 in the NASS sundial registry. http://www.sundials.org/index.php/dial-registry. The former, 666, Elliston Park Calgary, may be a beast but it is one of the first analemmatic sundials with seasonal markers showing where and when the sun rises and sets. For me the numbers are easy, the creative design is more challenging. Regards, Roger Bailey -- From: Robert Kellogg rkell...@comcast.net Sent: Friday, July 26, 2013 2:23 PM To: sundial@uni-koeln.de Subject: Re: Sundials in schools Take Linda Reid's comments to heart. Over the last 4 months I've helped two schools make analemmatic sundials. One was an Eagle Scout project, the other was a team of parents. So neither
sundials in schools
My sundials haven't sold as well as I hoped. In fact they haven't sold at all. Any advice you can give would be greatly appreciated. Some of the things I know X and Y coordinates are also given with my sundial. However, I promoted triangulation too much and people are unaware that I give measurements in the Cartesian coordinate system as well. This is confusing. I may drop triangulation all together. I'm slow to take this out because I cannot edit my movie. My movie software no longer works. Perhaps I will drop the movie altogether. I promoted the learning outcomes aspect of my sundial. Perhaps I shouldn't. Schools can quickly say, “We don't have time for any other activities” and therefore they look no further. It doesn't even occur to them that the sundial enhances any playground. It does not have to become a learning activity or be constructed by the children. What is your opinion? I don't have photos of children on my website. I don't have any because I haven't sold any. I tried to give some sundials away but can't. I'm a terrible salesman and sound more like a telemarketer. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Sundials in schools
My sundials haven't sold as well as I hoped. In fact they haven't sold at all. Any advice you can give would be greatly appreciated. Some of the things I know X and Y coordinates are also given with my sundial. However, I promoted triangulation too much and people are unaware that I give measurements in the Cartesian coordinate system as well. This is confusing. I may drop triangulation all together. I'm slow to take this out because I cannot edit my movie. My movie software no longer works. Perhaps I will drop the movie altogether. I promoted the learning outcomes aspect of my sundial. Perhaps I shouldn't. Schools can quickly say, “We don't have time for any other activities” and therefore they look no further. It doesn't even occur to them that the sundial enhances any playground. It does not have to become a learning activity or be constructed by the children. What is your opinion? I don't have photos of children on my website. I don't have any because I haven't sold any. I tried to give some sundials away but can't. I'm a terrible salesman and sound more like a telemarketer. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
sundials in schools
My sundials haven't sold as well as I hoped. In fact they haven't sold at all. Any advice you can give would be greatly appreciated. Some of the things I know X and Y coordinates are also given with my sundial. However, I promoted triangulation too much and people are unaware that I give measurements in the Cartesian coordinate system as well. This is confusing. I may drop triangulation all together. I'm slow to take this out because I cannot edit my movie. My movie software no longer works. Perhaps I will drop the movie altogether. I promoted the learning outcomes aspect of my sundial. Perhaps I shouldn't. Schools can quickly say, “We don't have time for any other activities” and therefore they look no further. It doesn't even occur to them that the sundial enhances any playground. It does not have to become a learning activity or be constructed by the children. What is your opinion? I don't have photos of children on my website. I don't have any because I haven't sold any. I tried to give some sundials away but can't. I'm a terrible salesman and sound more like a telemarketer. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Sundials in schools
My sundials haven't sold as well as I hoped. In fact they haven't sold at all. Any advice you can give would be greatly appreciated. Some of the things I know X and Y coordinates are also given with my sundial. However, I promoted triangulation too much and people are unaware that I give measurements in the Cartesian coordinate system as well. This is confusing. I may drop triangulation all together. I'm slow to take this out because I cannot edit my movie. My movie software no longer works. Perhaps I will drop the movie altogether. I promoted the learning outcomes aspect of my sundial. Perhaps I shouldn't. Schools can quickly say, “We don't have time for any other activities” and therefore they look no further. It doesn't even occur to them that the sundial enhances any playground. It does not have to become a learning activity or be constructed by the children. What is your opinion? I don't have photos of children on my website. I don't have any because I haven't sold any. I tried to give some sundials away but can't. I'm a terrible salesman and sound more like a telemarketer. Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Apology
I'm having troubled with gmail. I didn't mean to send you the same email 4 times. I'm not sure if I can receive your letters or if gmail automatically trashes them. If I don't reply, I'm not trying to be rude. Gmail's new improvements (that they shove down your throat) are a great patients exerciser Cheers Donald Christensen 0423 102 090 www.sundialsforlearning.com --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Shadow Question
Ah, the 'Why' stage. Brings back a few memories. One time we driving in the country. My son asked me, Why don't cows wipe their bottoms after they poo? I answered, Because their hooves tear through the toilet paper. Cheers Donald 0423 102 090 www.sundialsforlearning.com On Wed, Apr 3, 2013 at 1:06 AM, Richard B. Langley l...@unb.ca wrote: Question #4 is one that many adults don't know the answer to. There have been whole books written about it including Why the Sky Is Blue: Discovering the Color of Life by Gotz Hoeppe, translated by John Stewart (Winner of the 2010 Louis J. Battan Author's Award, awarded by the American Meteorological Society). See: http://press.princeton.edu/titles/8369.html. It recounts attempts at the explanation down through the ages starting with the ancient Greeks. I'm half-way through it. I attempted to briefly answer the question in the introduction to one of my GPS World Innovation columns. I'm attaching a PDF file of the first page of the article. The full article is too long to post but if anyone would like to have it, just contact me off list. -- Richard Langley On 2013-03-29, at 4:56 AM, Frank King wrote: Dear All, Widely reported in U.K. news reports today are the top five questions that children ask their mothers: 1) Why is water wet? 2) Where does the sky end? 3) What are shadows made of? 4) Why is the sky blue? 5) How do fish breathe under water? I am delighted to note that children are seemingly so interested in our subject area; questions 2, 3 and 4 are definitely sundial related! Clearly we should try to exploit this enthusiasm. Meantime... Could some Mum on this list please let us know the answer she gives to Q3? Frank H. King Cambridge, U.K. Example References: http://www.reuters.com/article/2013/03/28/idUSnMKW103a+70+MKW20130328 http://www.telegraph.co.uk/news/uknews/9959026/Mothers-asked-nearly-300-questio ns-a-day-study-finds.html --- https://lists.uni-koeln.de/mailman/listinfo/sundial - | Richard B. LangleyE-mail: l...@unb.ca | | Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ | | Dept. of Geodesy and Geomatics EngineeringPhone:+1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | |Fredericton? Where's that? See: http://www.fredericton.ca/ | - --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Analemmatic sundial
Joel I have combined the two animations and made them into one. Feel free to copy it for your site instead of having the two separate ones. Cheers Donald 0423 102 090 www.sundialsforlearning.com On Mon, Jan 14, 2013 at 4:44 AM, Roger Bailey rtbai...@telus.net wrote: --** From: rPauli rpa...@speakeasy.org Sent: Sunday, January 13, 2013 12:00 AM To: Roger Bailey rtbai...@telus.net Cc: h.sondereg...@utanet.at; sundial@uni-koeln.de Subject: Re: Analemmatic sundial Isn't there an optimal sundial design for equator regions? Hi Richard and all, The Greeks solved this with the hemispherium and scafe dials. The hemispherium is a spherical bowl with a point gnomon. The celestial sphere of the sky above is projected through the point onto hour and declination lines marked in the bowl. The curved bowl provides uniform scaling. A point gnomon above a horizontal or polar plane works as well but when the sun is low the shadow race off on a tangent. The scafe is a section of the hemisphere, the relevant section based on the suns declination. Fer De Vries has on his website design information for a hemisherium. Copy and paste this url: http://www.dse.nl/~**zonnewijzer/hemisph.htmhttp://www.dse.nl/~zonnewijzer/hemisph.htm Even a horizontal sundial with a polar gnomon works in the tropics. Generally just a section of the polar gnomon is used and this is raised and supported above the plane. Regards, Roger Bailey --**- https://lists.uni-koeln.de/**mailman/listinfo/sundialhttps://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Analemmatic sundial
Whoa! Hold on a moment! The fun has only just begun... Have you thought what happens in the tropics? I cover this on my web site - well sort of. I briefly explain that analemmatic dials in the tropics don't work as well. The shadow is short at times and the difference between the angles in the morning and afternoon are small. If the gnomon was a metal bar than the difference between 7 and 8 am could still be still. However with the shadow of a person, probably not. http://content.screencast.com/users/dchristensen777/folders/Default/media/148a31b3-f3e3-4c48-a455-59918b78d363/weipa.JPG I also show how the the date line becomes longer than the minor axis. http://www.sundialsforlearning.com/learning-outcomes-1/learning-outcomes-2/ If I cover all bases in every situation, my website won't be for children anymore. Dear Donald Good idea, I put a link on your site : http://www.cadrans-solaires.fr/livres.html with your 2 animations Thank you Joel. And thank you everybody that is on this forum. As I said, I had a fun time trying to understand sundials. Most of the data is for dials in the northern hemisphere. I had to convert it to southern hemisphere dials before I even knew how sundials work! This forum is brilliant. Cheers Donald 0423 102 090 www.sundialsforlearning.com On Sun, Jan 13, 2013 at 4:11 AM, Roger Bailey rtbai...@telus.net wrote: Perhaps this is why there are so few analemmatic sundials in the tropics. I do not know of any except for the one I built years ago at 20.4°, or 3° into the tropics. This dial was just markings in the sand on a beach, as impermanent as all messages on a beach. For similar reasons there are few vertical sundials in the tropics. The shadows are too long from the gnomon and any overhanging eaves. The reversal mid-day to the north side in the spring and summer is another design complexity. In any case it is interesting to explore, as Frank has, how latitude changes the designs. Regards, Roger Bailey from the polar side of temperate zone, N 48.6 --** From: Frank King frank.k...@cl.cam.ac.uk Sent: Saturday, January 12, 2013 3:14 AM To: Donald Christensen dchristensen...@gmail.com Cc: vk...@optusnet.com.au; Sundial Mailing Mailing List sundial@uni-koeln.de Subject: Re: Analemmatic sundial Dear Donald, You wrote... Brilliant idea Roderick! I put both animations on my website. Each one has a label under it stating which hemisphere it's for... Whoa! Hold on a moment! The fun has only just begun... Have you thought what happens in the tropics? Someone living at 20 degrees north (well into the northern hemisphere) will not be impressed by your northern hemisphere animation around the summer solstice. This is what happens: 1. The sun rises somewhat to the north of due east (no surprise so far). 2. It heads south for a while and therefore goes round clockwise (still no surprise). Then... 3. Suddenly it reverses direction and goes ANTI-clockwise, and it stays running that way... 4. ...through noon and... 5. well into the afternoon. Then... 6. Suddenly it reverses direction again and goes CLOCKwise until... 7. Sunset. Phew! Quite a day, eh? You get a hint of what's going on once you draw out an analemmatic sundial for 20 deg. north. You will see that the date line is LONGER than the minor axis of the hour-point ellipse. There are two times of day when the line from the summer solstice point (say) makes a tangent to the ellipse. These are the times when the direction reverses. I wonder how many readers think that I am kidding :-)) Life can get tough when you start thinking about special cases! Frank King Cambridge, U.K. --**- https://lists.uni-koeln.de/**mailman/listinfo/sundialhttps://lists.uni-koeln.de/mailman/listinfo/sundial - No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2890 / Virus Database: 2638/6027 - Release Date: 01/12/13 --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Analemmatic sundial
Once I moved to Australia from California, It took me about 3 years before I would stop make embarrassing mistakes concerning left from right. At times, I felt I was 6 years old again! I lived in California for 22 years The ocean is west The sun sets on the ocean We drove on the right When we face north, our back is to the equator In Brisbane The ocean is east The sun sets inland We drive on the left When we face north, we are also facing the equator I also had a fun time learning about sundials. 95% (or more) of the books and articles are for northern hemisphere dials. I had to try to convert this data to southern hemisphere before I even knew how a sundial works! I have changed the animation for the shadow to rotate the other direction. However, I'm still undecided of which one to use on my website and email footer http://content.screencast.com/users/dchristensen777/folders/Default/media/424ea0f6-012b-4d4f-ac4e-beb931f04403/GIRL_SHADOW%20northern%20dial.gif Cheers Donald 0423 102 090 www.sundialsforlearning.com On Sat, Jan 12, 2013 at 3:40 AM, Richard B. Langley l...@unb.ca wrote: Some years ago, I bought what seemed to be a nicely constructed equatorial sundial at a garden centre in Holland. I don't know about the display unit but the one in the box I bought turned out to be for the southern hemisphere when I got it home. Mounting the circular bow upside down made it usable although it necessitates crooking one's head 180 degrees to read it. ;-) -- Richard Langley On 11-Jan-13, at 1:32 PM, Roger Bailey wrote: Yes, there is a world of difference. I was recently in New Zealand and it took some time to get my head around the difference for sundials. South is their reference pole and the numbers do go the other way around. It is interesting a northern designed vertical south facing sundial is identical to a southern horizontal dial for the co-latitude. I found a number of good sundials in New Zealand but didn't find any that exploited the above advantage. Thanks Rosaleen Robertson of the New Zealand Sundial Association ( www.sundials.org.nz) for your assistance. Regards, Roger Bailey @ 48.6° north again From: Willy Leenders Sent: Friday, January 11, 2013 2:38 AM To: Willy Leenders Cc: sundial@uni-koeln.de Subject: Re: Analemmatic sundial My comment is valid only for the northern hemisphere Willy Leenders Hasselt in Flanders (Belgium) Op 11-jan-2013, om 11:20 heeft Willy Leenders het volgende geschreven: Donald, A nice idea. If you want to display the progress of the shadow from morning to evening, the movement must be in clockwise and not the rverse as in the animated image. Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 11-jan-2013, om 03:32 heeft Donald Christensen het volgende geschreven: Hi all I just had a cartoonist work on the logo for my website. The idea is that I wanted to put it in the footer of my emails. I will eventually put it in the header of my website - or more accurately, customize the wordpress theme so that I can put an animated gif next to the header. I'll include a link in case the moving logo does not work on this forum content.screencast.com/users/**dchristensen777/folders/** Default/media/d641cee8-137c-**456d-afc1-334e75526254/logohttp://content.screencast.com/users/dchristensen777/folders/Default/media/d641cee8-137c-456d-afc1-334e75526254/logoGIRL_SHADOW.gif Cheers Donald 0423 102 090 www.sundialsforlearning.com --**- https://lists.uni-koeln.de/**mailman/listinfo/sundialhttps://lists.uni-koeln.de/mailman/listinfo/sundial --**- https://lists.uni-koeln.de/**mailman/listinfo/sundialhttps://lists.uni-koeln.de/mailman/listinfo/sundial --**- https://lists.uni-koeln.de/**mailman/listinfo/sundialhttps://lists.uni-koeln.de/mailman/listinfo/sundial No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2890 / Virus Database: 2637/6024 - Release Date: 01/10/13 --**- https://lists.uni-koeln.de/**mailman/listinfo/sundialhttps://lists.uni-koeln.de/mailman/listinfo/sundial --**--** - | Richard B. LangleyE-mail: l...@unb.ca | | Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ | | Dept. of Geodesy and Geomatics EngineeringPhone:+1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | |Fredericton? Where's that? See: http://www.fredericton.ca
Re: Analemmatic sundial
Brilliant idea Roderick! I put both animations on my website. Each one has a label under it stating which hemisphere it's for Cheers Donald 0423 102 090 www.sundialsforlearning.com On Sat, Jan 12, 2013 at 12:24 PM, R Wall ml maillis...@optusnet.com.auwrote: Hi Donald, In Melbourne Australia we also drive on the left. But the sun still/always comes up in the East and sets in the West. The top edge of the style is still parallel with the axis of Earth. But as your animations show, the shadow in the Southern Hemisphere moves in a anticlockwise direction. And in a clockwise direction for the Northern Hemisphere. I did read somewhere where they say that the mechanical clock was invented in the Northern Hemisphere. Because the clock hands also move in a clockwise direction like the direction of the sun’s shadow in the Northern Hemisphere. Also interesting is that car speedos and other indicators also increase in a clockwise direction. Maybe someone else knows more about this? Like you I also find that a lot of sundial articles are written for the Northern Hemisphere. But I’m now use to having to convert them for the Southern Hemisphere, It’s even fun. With regard to your question on which animation you should use. Maybe you are able to determine if the visitors to your website are from the Northern or Southern Hemisphere, then display the correct Girl animation for them. Or you could have a question link asking which hemisphere they are from and display the correct animation. You may also like to turn one of the animations around (refer to below). On your website (and girl animations). I note that there are two sundials, one for Perth Australia and another for Whitehorse Canada. Would it be better to turn one around so that the points of the compass are in the same direction for both sundials, and to locate them so that the Canadian sundial is in the Northern Hemisphere and the Australian sundial is in the Southern Hemisphere? I suppose Australia is down under and would be at the bottom. You may also like to indicate where N, S, E and W are. Would this give a better understanding? You may also like to combine both girl animations to be in the same animation. I hope you are not near the bushfires there in Queensland. It’s been hot here in Melbourne, but this year not near the bushfires. I note that NSW have had 130 different fires burning at the same time. Regards, Roderick Wall. *From:* Donald Christensen dchristensen...@gmail.com *Sent:* Saturday, January 12, 2013 10:34 AM *To:* Richard B. Langley l...@unb.ca *Cc:* Sundial Mailing Mailing List sundial@uni-koeln.de *Subject:* Re: Analemmatic sundial Once I moved to Australia from California, It took me about 3 years before I would stop make embarrassing mistakes concerning left from right. At times, I felt I was 6 years old again! I lived in California for 22 years The ocean is west The sun sets on the ocean We drove on the right When we face north, our back is to the equator In Brisbane The ocean is east The sun sets inland We drive on the left When we face north, we are also facing the equator I also had a fun time learning about sundials. 95% (or more) of the books and articles are for northern hemisphere dials. I had to try to convert this data to southern hemisphere before I even knew how a sundial works! I have changed the animation for the shadow to rotate the other direction. However, I'm still undecided of which one to use on my website and email footer http://content.screencast.com/users/dchristensen777/folders/Default/media/424ea0f6-012b-4d4f-ac4e-beb931f04403/GIRL_SHADOW%20northern%20dial.gif Cheers Donald 0423 102 090 www.sundialsforlearning.com On Sat, Jan 12, 2013 at 3:40 AM, Richard B. Langley l...@unb.ca wrote: Some years ago, I bought what seemed to be a nicely constructed equatorial sundial at a garden centre in Holland. I don't know about the display unit but the one in the box I bought turned out to be for the southern hemisphere when I got it home. Mounting the circular bow upside down made it usable although it necessitates crooking one's head 180 degrees to read it. ;-) -- Richard Langley On 11-Jan-13, at 1:32 PM, Roger Bailey wrote: Yes, there is a world of difference. I was recently in New Zealand and it took some time to get my head around the difference for sundials. South is their reference pole and the numbers do go the other way around. It is interesting a northern designed vertical south facing sundial is identical to a southern horizontal dial for the co-latitude. I found a number of good sundials in New Zealand but didn't find any that exploited the above advantage. Thanks Rosaleen Robertson of the New Zealand Sundial Association ( www.sundials.org.nz) for your assistance. Regards, Roger Bailey @ 48.6° north again From: Willy Leenders Sent: Friday, January 11, 2013 2:38 AM To: Willy
Armillary Sundial
Who will design an Armillary Sundial? Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: SEO
Thank you Dave That was a wealth of information! I'll get my website so that it is mobile phone friendly. All of my animations are animated gifs. Is that better, worse, or indifferent to flash videos when it comes to Google ranking? Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! On Thu, Aug 30, 2012 at 1:56 AM, David Andersson davey.anders...@gmail.comwrote: In message cac+ykpu_bbrvddjrv4sft9a6fhs21cznnh0_wegbdtmpime...@mail.gmail.com Donald Christensen dchristensen...@gmail.com wrote: I want to thank you all for your help My website sundialsforlearning.com is now W3C Can anyone help me with SEO? I want to get a better ranking with Google If you had asked the question, say, 6 months ago - then I would have suggested contacting Bob Kellogg (www.sundials.org), or Doug Hunt (www.sunclocks.com ). Both those people (especially Doug Hunt) could probably have given you lots of good advice, if you want to increase any 'Search Engine' rankings on Google. However, after Google's recent Panda and Penguin updates to their (secret) algorithms they use to allocate placings - it is no longer as easy as before to achieve a high ranking by, say, getting lots of links to your website. I think Google realised that some SEO people were 'manipulating' things, by underhand (sometimes known as 'Black Hat') techniques, and decided to totally change the ranking algorithms to create a level playing field for everyone. For example, Google now seems to give a better ranking to websites with a lot of 'outgoing' links to other sites - rather than based on volume of incoming links, and I can see that this does make some sense if you think about it. People used to get 'reciprocal' links, by saying you link to me, and I will link to you - but doing that just cancelled-out the benefits of such links, which is not what Google intended when it started about fifteen years ago. Say a website has lots of incoming links, but none outgoing. From Google's point of view, it is a 'dead end' (no other website to visit from that one). Google wants links to follow, to increase its database of web pages - and so in this example, above, that selfish website will now be ranked downwards. I think that any honest SEO company would tell you we just do not know how to proceed at the moment, until clues might eventually start to filter out 'on the grapevine' from people who try new Search Optimization strategies. All I could suggest is have 'good content' (whatever that means!) on pages, plus avoid things like Flash videos since Google cannot read these in the same way as text wording. You have already taken a first step, by getting your website validated to W3C standards - but also make sure this works as intended on mobile telephones, because there now seems to be a fast-growing trend away from desk (or even lap-top) computers, to 'hand-held' devices. Hoping this helps, Dave Andersson. --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Thank you
Thank you The response was amazing and much appreciated. The offers of help, advice, and feedback were very helpful. I'm in the process of making my site W3C Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
website problems
I'm have trouble with my website. Not all browsers can view it. Can anyone help me with this? Dear Mr Christensen, Sorry for the slight delay in replying - but I had been checking why (as you had said), your new website works differently on various 'browsers'. Unfortunately, your web-designer (Craig Cameron) has not produced this in accordance with the internationally-agreed W3C standards for websites. Think of this as your web-designer being the 'Architect', plus the W3C standards being equivalent to the necessary 'Building Regulations' - and so if you do not follow them, then there is going to be serious trouble. If it helps, I have 'attached' an official report - which shows that you have 87 design errors on the opening page of your website alone, plus it might have even more within other areas (but I have not checked those). You can verify this for yourself, via the W3C validator - which is fast and free, plus showing your web-designer how to correct all his mistakes. The whole point of those 'standards', is to make sure your website would be seen correctly - no matter what type of computer or browser is being used, so I recommend that you contact Craig Cameron to ask why he has not created your website pages in the proper manner. Some designers may say that they cannot (or will not) comply with the W3C standards, in which case I suggest you find another designer who would do things correctly ! Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: sundials in schools
Roderick Thank you for pointing out my slip up. I'll sort out my paypal account jmikeshaw I don't understand. Did you find a mistake or is the problem that I don't spell out that I design for northern and southern dials Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! On Mon, Aug 13, 2012 at 5:46 PM, RW Mail List maillis...@optusnet.com.auwrote: Hi Donald, Your website doesn't indicate the location of your business and if the $275.00 kit price is in US dollars? Roderick. *From:* Donald Christensen dchristensen...@gmail.com *Sent:* Monday, August 13, 2012 3:14 PM *To:* sundial@uni-koeln.de *Subject:* sundials in schools My website is finally done It's about putting in analemmatic sundials in schools. http://www.youtube.com/watch?v=SoW-Kl_kaxw http://www.sundialsforlearning.com/ Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! -- --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2197 / Virus Database: 2437/5196 - Release Date: 08/12/12 No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2197 / Virus Database: 2437/5196 - Release Date: 08/12/12 --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial
sundials in schools
My website is finally done It's about putting in analemmatic sundials in schools. http://www.youtube.com/watch?v=SoW-Kl_kaxw http://www.sundialsforlearning.com/ Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundials in school playgrounds
I found an excellent blog. It's is updated weekly with the most amazing stories on how fear, hysteria, and the compensation culture is overriding common sense. Safety is becoming so stringent that it's dangerous. http://freerangekids.wordpress.com/ Below is an example Dear Free-Range Kids: This reminds me of a ‘chemical spill’ my school had a couple months back. Keep in mind this is a high school, with around 800 14-18 year olds walking the halls. . We were told to evacuate because of a ‘chemical spill’ in one of the science labs a bit before noon. Now, there were some actual dangerous chemicals in some of the rooms, so we evacuated without complaint. Soon, we found out what the ‘chemical spill’ was: mercury. Someone had dropped an old thermometer made of mercury, so the entire school had to be evacuated. . We had to sit out on the football field for four hours. There were no clouds to block the sun, it was actually fairly chilly out, and about half the school hadn’t had a chance to eat lunch. No one was allowed to leave to stadium, even to grab a sweatshirt that was sitting ten feet away in their car. . They had to test everyone who had been inside that room that day for traces of mercury. Two hours later, they all came up negative. I got a mild sunburn from that day, which I’m pretty sure was a bigger cancer risk than a bit of mercury. . Also, since I nearly failed chemistry, I asked my homeroom teacher (who happened to be a science teacher) if the mercury was really that bad for us. He said no, mercury is usually only harmful if ingested. So my entire school was kept out on a lawn freezing our hungry butts off and getting sunburned not only for two hours of our school day, but two hours AFTER school had ended, to ensure no one was licking the mercury off the floor. and another Kids Severely Sunburned at School Because They Didn’t Have “Prescription” for Sunscreenhttp://freerangekids.wordpress.com/2012/06/21/kids-severely-sunburned-at-school-because-didnt-have-prescription-for-sunscreen/ Posted on June 21, 2012 by lskenazy Readers — As much as anything, this blog is dedicated to the idea that we MUST use our brains and compassion and not blindly follow orders that exist only to avoid liability or blame. So take a look at what happened to these girls http://lifephotographed.com/2012/06/burn-babies-burn/#comment-876at their school’s field day. (Warning: The pictures are painful!) The girls were kept out in the sun and severely burned, to the point where the adults at the school were noticing and commenting. Later, the principal explained her…what’s it called in a war when you don’t stand up and fight for justice? …her *that. *Her blithe justification for why she didn’t do the right thing: Her response centered around the the school inability to administer what they considered a prescription/medication (sunscreen) for liability reasons. And while I can* sort of* wrap my brain around this in theory, the practice of a blanket policy which clearly allows for students to be put in harm’s way is deeply flawed. Not only does a parent have to take an unrealistic (an un-intuitive) step by visiting a doctor for a “prescription” for an over-the-counter product, children are not allowed to carry it on their person and apply as needed. TALK ABOUT INSANE! Folks, I am thinking of writing a book — a mini-one — on this whole issue. The issue of our safety fears becoming so ornate and far-fetched (“What if a child uses sunscreen inappropriately?”) that we not only lose all common sense, we lose our ability to think or even feel. We become stunted. The principal didn’t frame it this way, but it was her decision to LET those girls burn. Sure, she was “just following orders” — the insurance company’s, perhaps, or the school district’s. But we’ve seen where just following orders can lead. – L. Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! On Thu, Jun 28, 2012 at 7:21 AM, Anne Lennon anne-len...@supanet.comwrote: In message 4feb019a.7080...@seiner.com Yan Seiner y...@seiner.com wrote: david.paw...@fsmail.net wrote: What is all the fuss about Analemmatic sundials in school playgrounds all about ? I would love to get some real documentation on this. A copy of a letter, minutes of meetings, that sort of thing banning sundials in schools. Anyone? I know Martina is active in this area; please get me some tangible materials I can use. Dear Yan, I do not have any direct knowledge/proof of why Analemmatic layouts are being 'banned', by schools - but I certainly know that the Health and Safety culture is stopping otherwise innocent/educational activities. Here is just one example - where a 3-year-old child has been branded as a 'criminal', for drawing harmless chalk
Re: Why are schools, across the world, 'banning' analemmatic sundials ?
I found an excellent book on the matter It shows how we are making the world more dangerous for children. Society protects them so much that we prevent them from learning how to cope in the stressful world. Children grow old. We can't prevent that. However we can prevent them from growing up. “Beautifully written [...] lays out very simply how we are absolutely screwing the development of children, given our complete paranoid fear of the world we live in.”* Tanya Byronhttp://thebrowser.com/interviews/tanya-byron-on-child-psychology-and-mental-healthin the Browser. * *No Fear: Growing up in a risk averse society* argues that childhood is being undermined by the growth of risk aversion. This restricts children’s play, limits their freedom of movement, corrodes their relationships with adults and constrains their exploration of physical, social and virtual worlds. http://rethinkingchildhood.com/no-fear/ On Sun, May 27, 2012 at 10:19 PM, Martina Addiscott martina.addisc...@gmail.com wrote: In message 20120517002755.K4ADT.56582.root@nschwwebs03p John Pickard john.pick...@bigpond.com wrote: Good morning Martina, I've been following the various replies, and I agree wholeheartedly with the sentiments expressed about stupid attempts to reduce risk to zero. We all have our favourite stories, but I think that these examples will top the list. I understand that one of the largest mining companies in the world (Rio Tinto Australia) is so concerned about risk that it has banned the use of scissors and electric staplers. I have never seen an electric stapler where you could hurt yourself unless you really wanted to. And as for scissors ...! But I fail to see how a painted or other analemmatic dial poses any sort of risk, even in the Australian sun. All primary schools here require kids to wear hats when in the playground, and I support this. After all, Australia is the skin cancer capital of the world, and hats make a big difference (I know from having numerous non-malignant growths removed from my face, ears and neck after decades of field work in deserts etc.) But analemmatic dials ...? I despair of the direction all this is headed. Cheers, John Following-on from previous correspondence, I was recently sent the attached newspaper article. George Marshall (in Australia) was 'too shy' to send it direct to the Sundial Mailing List, and so this had been sent to me privately for my consideration. However, if anybody wants to respond to George (who is located in the Brisbane area) - his E-mail is: geo...@exemail.com.au At least there is now a 'ray of hope' that the world might just be reverting to a more reasonable attitude - rather than being ruled by the Health Safety brigade, or Lawyers/Accountants. As other people have said, the main problem seems to be one of possible 'litigation', and/or 'compensation' - if a child were to be injured by anything (no matter how harmless it appears). I am certainly no legal expert - but apparently this is caused by a mix of Due Diligence, plus Contributory Negligence. Certainly here in the UK, we must conduct a 'Risk Assessment' of anything new for a school - and especially if the children might be physically interacting with this, in whatever ways. Unfortunately, the current thinking seems to be that (if any child were to be hurt), then SOMEBODY must be to blame - but it cannot be the child, since obviously somebody else has not fully conducted that preliminary 'Risk Assessment' properly ! In other words - somebody, somewhere, will be held as (partly) guilty of whatever happened, due to 'Contributory Negligence', but it will be for the Lawyers to fight over and profit from. Apart from schools, I even heard about a sundial designer (in Croatia), who was not permitted to put a metal 'analemmatic' layout into a public area - because the metal might get too hot in the sun, burn people's feet, so give rise to claims for compensation plus also potentially harming the tourist trade ! As a person on this 'List' said - the world has gone crazy. Sincerely, Martina Addiscott. --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Why are schools, across the world, 'banning' analemmatic sundials ?
I was sickened how society prevents children from growing up or learning how to cope with life. That is until I read about Lenore Skenazy http://freerangekids.wordpress.com/ and Tim Gill http://rethinkingchildhood.com/ It looks like this will turn around. It may take a generation or 2 to do so. However, society is starting to figure out that the current idea is harmful to children. On Mon, May 28, 2012 at 11:44 AM, darkro...@aol.com wrote: Part of the problem seems to be that society is getting to a point where what ever happens there must be someone to blame. People just can't accept that stuff happens, get over it. It is true that if a child is over protected then they cannot learn how to effectively handle situations they face as they grow up. And with society looking for someone to blame for EVERYTHING that happens to them is proof that they have not learned the same thing. A child falls and skins a knee, the parents call the school and chew out the teacher for not watching their child. The sad thing is those of authority are too afraid of bad press of law suits that they may discipline the teacher. I don't know of any cases in the US where sundials are banned from schools but I have not looked either. It never crossed my mind that it would be a problem. -Original Message- From: Donald Christensen dchristensen...@gmail.com To: sundial sundial@uni-koeln.de Sent: Sun, May 27, 2012 8:29 pm Subject: Re: Why are schools, across the world, 'banning' analemmatic sundials ? I found an excellent book on the matter It shows how we are making the world more dangerous for children. Society protects them so much that we prevent them from learning how to cope in the stressful world. Children grow old. We can't prevent that. However we can prevent them from growing up. “Beautifully written [...] lays out very simply how we are absolutely screwing the development of children, given our complete paranoid fear of the world we live in.”* Tanya Byronhttp://thebrowser.com/interviews/tanya-byron-on-child-psychology-and-mental-healthin the Browser. * *No Fear: Growing up in a risk averse society* argues that childhood is being undermined by the growth of risk aversion. This restricts children’s play, limits their freedom of movement, corrodes their relationships with adults and constrains their exploration of physical, social and virtual worlds. http://rethinkingchildhood.com/no-fear/ On Sun, May 27, 2012 at 10:19 PM, Martina Addiscott martina.addisc...@gmail.com wrote: In message 20120517002755.K4ADT.56582.root@nschwwebs03p John Pickard john.pick...@bigpond.com wrote: Good morning Martina, I've been following the various replies, and I agree wholeheartedly with the sentiments expressed about stupid attempts to reduce risk to zero. We all have our favourite stories, but I think that these examples will top the list. I understand that one of the largest mining companies in the world (Rio Tinto Australia) is so concerned about risk that it has banned the use of scissors and electric staplers. I have never seen an electric stapler where you could hurt yourself unless you really wanted to. And as for scissors ...! But I fail to see how a painted or other analemmatic dial poses any sort of risk, even in the Australian sun. All primary schools here require kids to wear hats when in the playground, and I support this. After all, Australia is the skin cancer capital of the world, and hats make a big difference (I know from having numerous non-malignant growths removed from my face, ears and neck after decades of field work in deserts etc.) But analemmatic dials ...? I despair of the direction all this is headed. Cheers, John Following-on from previous correspondence, I was recently sent the attached newspaper article. George Marshall (in Australia) was 'too shy' to send it direct to the Sundial Mailing List, and so this had been sent to me privately for my consideration. However, if anybody wants to respond to George (who is located in the Brisbane area) - his E-mail is: geo...@exemail.com.au At least there is now a 'ray of hope' that the world might just be reverting to a more reasonable attitude - rather than being ruled by the Health Safety brigade, or Lawyers/Accountants. As other people have said, the main problem seems to be one of possible 'litigation', and/or 'compensation' - if a child were to be injured by anything (no matter how harmless it appears). I am certainly no legal expert - but apparently this is caused by a mix of Due Diligence, plus Contributory Negligence. Certainly here in the UK, we must conduct a 'Risk Assessment' of anything new for a school - and especially if the children might be physically interacting with this, in whatever ways. Unfortunately, the current thinking seems to be that (if any child were to be hurt), then SOMEBODY must be to blame
Re: Why are schools, across the world, 'banning' analemmatic sundials ?
…….I would like to know the real, truthful reason these sundials are being banned, and it better be a good one. Don’t ponder on this with logic too long or you will get a headache. I hope nobody under 18 reads the email. I’d hate for this forum to get sued for being too dangerous. The legal tsunami and the helicopter parenting have combined and they resemble a runaway freight train. Even some of the pawns and bureaucrats that enforce the ridiculous, know that it’s ridiculous but feel powerless to stop it. I really like the writing of Lenore Skenazy. She became famous when she let her 9 year old son ride the train by himself. He has made journey hundreds of times with an adult. He knew it so well that he could almost do it in his sleep. http://freerangekids.wordpress.com/ The media got hold of this and she was invited to appear on radio and television. She was then ambushed by child experts to help her reform. She also appeared on ‘The View’ where the 4 ladies all blasted her for reckulous child endangerment! She then wrote a book called Free Range Kids. It’s a quite a wake-up call! Below is an article that I wrote for her website Children grow up to be adults. The transition stage for child to adult can be very stressful. We all know that confidence and self esteem are very import. Some people have a low self esteem while others esteem is high. However, where does it come from? Is it something that you may be borne with like a cleft chin? Confidence and self esteem is a life-long development that starts on the very first day. When mom walks out into the other room and walks back, the baby starts understanding that he or she can live without mom for 10 seconds. When they open the refrigerator a pour a glass of milk by themselves, it adds to the confidence tally. It’s inevitable that parents have to make decisions about the child’s safety and how far will you allow them to wander. Whether or not they allow them to walk to school or use a public toilet is an open debate. Is it too dangerous to let them do this? There is a danger factor of allowing them freedom but there is also dangerous not to. Hindering the development of confidence also stunts their growth in self esteem. Parents get so caught in protecting their children so much that they forget that it is also their duty to prepare them for life. Anxiety and depression is happening in epidemic proportions. It is also strongly connected to self esteem. Before you tell off a mother for being neglectful for allowing her son to ride the train, stop and think. Are you being neglectful for not allowing your son to ride the train? The transition from child to adult is very stressful. However, we make it MUCH more stressful if we prevent children from experiencing life for as long as we can. We make the learning curve much more severe. Life is stressful enough. Why do we want to make it more stressful? Donald On Thu, May 17, 2012 at 8:04 AM, darkro...@aol.com wrote: That is even more ridiculous. Almost daily some child in my school is falling down and skinning a knee, arguing with others or getting in a small pushing match. We have over 460 kids, its going to happen. And if 20 years from now, getting skin cancer, prove it that it came from standing on a sundial when you were 7 years old and it was not from playing at the beach or playing on weekends in their own backyard. There is no more a liability with a human sundial then there is playing hopscotch, probably less, you could trip playing hopscotch. I would like to know the real, truthful reason these sundials are being banned, and it better be a good one. Pat -Original Message- From: David Bell db...@thebells.net To: darkroom3 darkro...@aol.com Cc: Reinhold.Kriegler reinhold.krieg...@gmx.de; sundial sund...@rrz.uni-koeln.de Sent: Wed, May 16, 2012 2:12 pm Subject: Re: Why are schools, across the world, 'banning' analemmatic sundials ? It has little or nothing to do with controlling the students, or even concern over their welfare. It all comes down to liability. Should some child be injured in a schoolyard scuffle, or 20 years later develop a skin cancer, some shyster lawyer WILL find a way to hold the school responsible! Dave Sent from my iPhone On May 15, 2012, at 9:15 AM, darkro...@aol.com wrote: Those are utter rediculous reasons for not having an analemmatic sundial at school. Do these schools have no control or supervision over their students? It is great to get students outside to learn. Many people learn better by hands-on-learning. I had planned to make an analemmatic sundial on my school bus lot this year but it will have to wait until next fall. Our principle and teachers are excited to have it because it will be used for several different lesson by the entire elementary school. My environemental club made small sundials and learned the basics, next year will be the human
Re: Re solar time calculator
Fer
Thank for your help. It's great to know someone else believes that this
should work. (I was wondering if I was going mad)
I added the EOT. I also subtracted the EOT. Neither worked. This is the
reason for cell f18 (purple one) I tried this as 1.
I also tried this as -1
The confusing part is that my solar compass seemed to work on april 16 and
sep 2. (when Eot = approximatly 0) Therefore, the problem should be just
what you said.
Also just to clarify my 2+3=5 analogy
True north + sundial + EOT correction + logitude correction = time
This is why I'm trying to find a way to make
time - {sundial + EOT correction + logitude correction} = true north
Donald
On Sat, Oct 15, 2011 at 12:22 AM, fer de vries
ferdevr...@onsneteindhoven.nl wrote:
**
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
*From:* fer de vries ferdevr...@onsneteindhoven.nl
*To:* Donald Christensen dchristensen...@gmail.com
*Cc:* sundial sundial@uni-koeln.de
*Sent:* Friday, October 14, 2011 4:20 PM
*Subject:* Re: solar time calculator
Donald,
I quess I was puzzling to much and the solution looks easy now.
In October the sun is ahaed and in the spreadsheet the EoT is positive.
If changing from watchtime to suntime the EoT should be added then.
In the spredasheet it is subtracted.
Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
*From:* Donald Christensen dchristensen...@gmail.com
*To:* fer de vries ferdevr...@onsneteindhoven.nl
*Cc:* sundial sundial@uni-koeln.de
*Sent:* Friday, October 14, 2011 12:55 PM
*Subject:* Re: solar time calculator
Thank you for your reply. I'm also glad to hear from somebody that
indicates that it can be done.
However, I don't understand your reply. Why do I take out the longitude
correction?
A sundial without longitude correction need to factor in both EOT and
longitude in order to read it in clock time. A sundial with longitude
correction in it only needs to worry about the EOT. I'm going to make a
sundial without longitude correction but I will add longitude correction in
my spreadsheet. I'll then see if I get the same results.
I understand that it is much more complicated than 2+3=5 Therefore 5-2=3.
I'm not trying to be patronizing and I appologize if I offend someone but I
don't understand why I can't go backwards as well.
I read my solar compass on April 16 and again on Sept 2 when EOT didn't
need to be factored in. My compass worked. Mind you, I didn't take readings
throughout the day. (It didn't occur to me that I should) I just noticed
that it agreed with another method that I used to find north.
Attached is the spreadsheet saved as Excel 97
On Fri, Oct 14, 2011 at 8:11 PM, fer de vries
ferdevr...@onsneteindhoven.nl wrote:
**
Donald,
I can't open your file because I have an older Excel program.
But I think to have the solution what you want to do.
You set your watch to local suntime.
With that time you are in the field with a sundial.
Seen the pictures that is an analemmatic sundial, corrected for longitude.
The XII is offset from the line of dates.
And I think that is the problem.
You need a sundial that gives local suntime, the time you have in your
pocket on the watch.
Rotate the analemmatic dial until it reads the same time as your watch and
you have the North South line.
Best wishes, Fer.
Fer J. de Vries
De Zonnewijzerkring
http://www.de-zonnewijzerkring.nl
Molens
http://www.collsemolen.dse.nl
Eindhoven, Netherlands
lat. 51:30 N long. 5:30 E
- Original Message -
*From:* Donald Christensen dchristensen...@gmail.com
*To:* sundial@uni-koeln.de
*Sent:* Friday, October 14, 2011 5:10 AM
*Subject:* solar time calculator
Not sure what I’m doing wrong
I wrote a program so that I can set my watch to solar time.
Something is wrong. Either my program is wrong or my sundial is
inaccurate.
To use the program
Set your computer accurately to clock time
Run the macro ‘recalc’. This will make the clock on your computer display
on the spreadsheet in real time. This will also input today’s date. This
date will lookup the EOT and either add or subtract the time
Set your watch to solar time
The purple cell is for troubleshooting. 1 = add the eot values (positive
or negative). -1 will subtract these values. Once I figure out which one to
use, it will be true for all days. At the moment, neither work
My objective is to make a solar compass that will work for my area only
I’ll simply rotate the sundial that I designed with longitude correction
until it agrees with my watch that I set to solar time.
I understand that the EOT has accuracy
Re: solar time calculator
Hi sorry I phrased it wrong. I want to find north by using my sundial which has been designed with longitude correction. Therefore, I'm not after a solar time calculator. I just want a clock that will compensate the EOT However now that I have Time Zone Master, (thank you David) I'll make another sundial without longitude correction and compare it to the other. Donald On Fri, Oct 14, 2011 at 1:32 PM, David Patte dpa...@relativedata.comwrote: Not sure what you did wrong, but you can download Time Zone Master for free from www.relativedata.com which shows sundial time for any location, and corrects for EoT, light refraction, aberration, nutation and precession, as well as any of about 100 different timezone rules. On 2011-10-13 23:10, Donald Christensen wrote: Not sure what I’m doing wrong I wrote a program so that I can set my watch to solar time. Something is wrong. Either my program is wrong or my sundial is inaccurate. To use the program Set your computer accurately to clock time Run the macro ‘recalc’. This will make the clock on your computer display on the spreadsheet in real time. This will also input today’s date. This date will lookup the EOT and either add or subtract the time Set your watch to solar time The purple cell is for troubleshooting. 1 = add the eot values (positive or negative). -1 will subtract these values. Once I figure out which one to use, it will be true for all days. At the moment, neither work My objective is to make a solar compass that will work for my area only I’ll simply rotate the sundial that I designed with longitude correction until it agrees with my watch that I set to solar time. I understand that the EOT has accuracy problems. However, I thought it was accurate enough for what I want it for. I’d like your feedback on that. I’d also like your feedback on whether or not my goal is realistic in spite of the accumulation of small errors such as eot, sundial accuracy, gnomon placement and gnomon perpendicular to the dial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! ---https://lists.uni-koeln.de/mailman/listinfo/sundial -- No Are you supposed to post replies below the message? --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: EOT
I guess what I was trying to say is that I understand it but I don't understand it. Why does the inclination of the earth affect time if solar day vs sidereal day has no effect? Donald On Sun, Sep 25, 2011 at 12:50 PM, Donald Christensen dchristensen...@gmail.com wrote: attached are two more pics I understand about Kepers law and the eccentic contribution to the eot. I.E. faster as the earth moves closer to the sun. slower as the earth moves away from the sun. On the graph, the eccentric contribution has one hump (july to jan it adds time) this makes sense because it only happens once a year. In earth tilt.jpg I group A and B together as the inclination of the earth is the same. C and D ares also the same. This is the reason for the two humps on the graph for the tilt contribution Perhaps I was clutching at straws as I suggested solar day vs sidereal day affected the eot. I could be way off track. However, I'm still trying to understand it. Donald On Sun, Sep 25, 2011 at 3:24 AM, sun.di...@libero.it sun.di...@libero.itwrote: Donald, the picture you sent is related to the difference between sidereal and solar time (where the inclination of the earth has no effect) and not to the EoT. You can find an explanation of the EoT at http://en.wikipedia.org/wiki/Equation_of_time where you will find that the obliquity of the ecliptic (that is the inclination of the earth) is important and it is taken into account. Ciao. Gian Messaggio originale Da: dchristensen...@gmail.com Data: 24/09/2011 7.40 A: sundial@uni-koeln.de Ogg: EOT I’m trying to understand the equation of time All diagrams that I have seen (like the attached) are only two dimensional. For the sake of simplicity, the earth tilt is ignored. According to a two dimensional drawing, it will always require more than a 360 degree revolution for a point on the earth to face the sun again. However the earth is tilted. Does this mean that sometimes it takes more than 360 to make a revolution and sometimes it takes less? Or does this mean that it always takes more than a 360 degree revolution. However because of the tilt, the additional spin required to face the sun again is greater on some days than on others. I think its the later answer but I'm not sure. -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
EOT
I’m trying to understand the equation of time All diagrams that I have seen (like the attached) are only two dimensional. For the sake of simplicity, the earth tilt is ignored. According to a two dimensional drawing, it will always require more than a 360 degree revolution for a point on the earth to face the sun again. However the earth is tilted. Does this mean that sometimes it takes more than 360 to make a revolution and sometimes it takes less? Or does this mean that it always takes more than a 360 degree revolution. However because of the tilt, the additional spin required to face the sun again is greater on some days than on others. I think its the later answer but I'm not sure. -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! attachment: Sidereal_Time_en.PNG--- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sara Schechner
Karon Where do I find Saras article? On Tue, Aug 16, 2011 at 3:22 AM, Willy Leenders willy.leend...@telenet.bewrote: Karon, More on timekeeping and history you can read on my website concerning the the oldest surviving sundial, found in Egypt around 1500 BC See http://www.wijzerweb.be/egypteengels.html Willy Leenders Hasselt in Flanders (Belgium) Visit my website about the sundials in the province of Limburg (Flanders) with a section 'worth knowing about sundials' (mostly in Dutch): http://www.wijzerweb.be Op 15-aug-2011, om 15:17 heeft karon het volgende geschreven: *I just read Sara’s excellent article on sundials and their history and their place in history. VERY nice. I would love to see some similar information on the development of sundials and their usage and how time came to rule other cultures. Of course, in western culture, a lot of it had to do with religion first and when prayers should be said (sorry to the folks who hate any mention of religion on this group). Then the regulating of time began to be part of daily life. It seems, as people began interacting more. * * * *Simple fact was, if you were planning to see someone, you had to know when they would be at a certain place. If not, you miss them (how many romantic comedies have been made on THAT premise?).* * * *Basically, if you spent all your time on your own farm and never went anywhere else, it did not matter how precise was your time keeping. As she notes in one of her references, a peasant’s stomach is the best time keeper (my daughter and I were discussing the same manner of timekeeping last weekG) but, when the farmer is supposed to head over to the next farm for some reason, now, that social interaction requires time keeping.* * * *As society became its own profession in upper classes, much of social interaction was judged by time. The amount of time you spent in one’s company was also a measure of your place in the world and theirs. Too short an amount of time is considered rude, too long as well. time defines us in so many way. If you saw the movie ‘The Queen’ the first meeting between Her Majesty and Tony Blair even mentions it. after the meeting, Her Majesty asks her assistant, “Was that OK? 15 minutes, one doesn’t want to be rude.” So, even Royalty measure their own manners by time.* * * *Sara, if you are still around the group, thank you for a marvelous article! I would love to see more. this is a wonderful understanding of how time in particular and sundials as one of many ways to measure time can illustrate our history.* * * *Karon Adams* *Accredited Jewelry Professional (GIA)* *You can send a free Rosary to a soldier!* *www.facebook.com/MilitaryRosary* *www.YellowRibbonRosaries.com* ** ** --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
appology
I appologize to the group. I was the first to mention trees. The other topic ended up as a debate over definitions. Glass does what it does no matter what it is called. I talked about trees because that is another debate that ends over definitions. My opinion of the definition of sound is as follows: Who cares? I’m embarrassed that I sparked off fighting that could threaten the survival of this forum. What makes it worse is that it is on a topic that I care so little about. -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Falling Tree
Don't worry Karon, I enjoyed your joke. I'm also glad to see that you didn't get upset when the joke/slam agaist women was passed that according to women, men are always wrong On Fri, Aug 12, 2011 at 9:43 AM, karon ka...@karonadams.com wrote: *Yes, especially if his lips are moving. The inherent wrongness is a function of the xy chromosome not a function of whether there is a pair of XX Chromosomes to hear the incorrect statement.* * * *Karon Adams* *Accredited Jewelry Professional (GIA)* *You can send a free Rosary to a soldier!* *www.facebook.com/MilitaryRosary* *www.YellowRibbonRosaries.com* * * *From:* sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] *On Behalf Of *Mike Shaw *Sent:* Thursday, August 11, 2011 6:21 PM *To:* Donald Christensen; Archie Kregear *Cc:* sundial@uni-koeln.de *Subject:* Re: Falling Tree ** ** If a married man says something in the middle of a forest where nobody can hear him – is he still wrong? Mike Shaw 53º 22'N 03º02'W www.wiz.to/sundials -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Let's keep this forum going
I'm very greatful for this forum. Sundials are specialized topic. Where else could you find a group of people so knowledgeable and so willing to help. I think this as a great comment I hope you all realize that it's a full moon and the seasons are changing. Almost every list I'm on is having arguments of one kind or another. Happens every year. It is not a co-incidence. Give it a week and everything will calm down and everybody will feel better. And no, I don't think it's fair either, that all should be punished because one person complained and another was rude. -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Falling Tree
Sorry, I wasn't trying to kick off another debate. I was only trying to compare falling trees and flowing glass Donald On Fri, Aug 12, 2011 at 8:04 AM, Archie Kregear arch...@charter.net wrote: But, if I think not. Am I not? I think not! Don't you think? -Original Message- From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Simon [illustratingshadows Sent: Thursday, August 11, 2011 9:54 AM To: sundial@uni-koeln.de; Bill Gottesman Subject: Re: Falling Tree I hate to say this, but since Descarte has been dragged into the discussion, you need to know of his sad fate, and how he vanished from the face of the earth. He was in a cafe in Paris when a waiter asked if he would like to see the menu. He answered I think not. Simon Wheaton-Smith www.illustratingshadows.com Silver City, New Mexico W108.2 N32.75 and Phoenix, Arizona, W112.1 N33.5 --- On Thu, 8/11/11, Bill Gottesman billgottes...@comcast.net wrote: From: Bill Gottesman billgottes...@comcast.net Subject: Falling Tree To: sundial@uni-koeln.de Date: Thursday, August 11, 2011, 8:39 AM I think quantum physicists Neils Bohr and Erwin Schrodinger would say there is no sound until it is observed. But I don't understand this stuff all too well. -Bill On 8/10/2011 7:26 PM, Donald Christensen wrote: If a tree falls in the forest where no one can hear it, does it make a sound? --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Falling Tree
Glass moves. Even if you dont accept that it moves, it does something to relieve the stress in it when it is freshly scratched with a glass cutter. Glass must be cut quickly after it is scratched. This happen regardless of whether it's called solid, liquid, or fluid. To me, the debate started sounding like an arguement of definitions similar to sound or noise comming from a tree. On Fri, Aug 12, 2011 at 8:10 AM, Donald Christensen dchristensen...@gmail.com wrote: Sorry, I wasn't trying to kick off another debate. I was only trying to compare falling trees and flowing glass Donald On Fri, Aug 12, 2011 at 8:04 AM, Archie Kregear arch...@charter.netwrote: But, if I think not. Am I not? I think not! Don't you think? -Original Message- From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Simon [illustratingshadows Sent: Thursday, August 11, 2011 9:54 AM To: sundial@uni-koeln.de; Bill Gottesman Subject: Re: Falling Tree I hate to say this, but since Descarte has been dragged into the discussion, you need to know of his sad fate, and how he vanished from the face of the earth. He was in a cafe in Paris when a waiter asked if he would like to see the menu. He answered I think not. Simon Wheaton-Smith www.illustratingshadows.com Silver City, New Mexico W108.2 N32.75 and Phoenix, Arizona, W112.1 N33.5 --- On Thu, 8/11/11, Bill Gottesman billgottes...@comcast.net wrote: From: Bill Gottesman billgottes...@comcast.net Subject: Falling Tree To: sundial@uni-koeln.de Date: Thursday, August 11, 2011, 8:39 AM I think quantum physicists Neils Bohr and Erwin Schrodinger would say there is no sound until it is observed. But I don't understand this stuff all too well. -Bill On 8/10/2011 7:26 PM, Donald Christensen wrote: If a tree falls in the forest where no one can hear it, does it make a sound? --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: R: RE: Flow of medieval glass
If a tree falls in the forest where no one can hear it, does it make a
sound?
On Thu, Aug 11, 2011 at 3:24 AM, Simon [illustratingshadows
illustratingshad...@yahoo.com wrote:
My two cents worth, having worked with glass for decades.
1. don't confuse an object bending under its own weight with the object
being fluid.
2. since this news group deals with sunlight, we should remember that light
is both a particle and a wave, and there were heated discussions back
in
those days.
Now I have to go and finish a sundial I am making.
Simon Wheaton-Smith
www.illustratingshadows.com
Silver City, New Mexico W108.2 N32.75 and
Phoenix, Arizona, W112.1 N33.5
--- On *Wed, 8/10/11, sun.di...@libero.it sun.di...@libero.it* wrote:
From: sun.di...@libero.it sun.di...@libero.it
Subject: R: RE: Flow of medieval glass
To: Sundial List sundial@uni-koeln.de
Date: Wednesday, August 10, 2011, 11:05 AM
Accepted that glass atoms can migrate because they are not linked
together, the following question is : at wich speed?
I found the following in wikipedia in the Glass page:
Writing in the American Journal of Physics, physicist Edgar D. Zanottostates
...the predicted relaxation time for GeO
2 at room temperature is 1032 years. Hence, the relaxation period
(characteristic flow time) of cathedral glasses would be even
longer.[39]http://us.mc1110.mail.yahoo.com/mc/welcome?.gx=1.tm=1312996722.rand=9ju6qipj1sgsd#cite_note-38(10
32 years is many times longer than the estimated age of the Universe.) If
medieval glass has flowed perceptibly, then ancient Roman and Egyptian
objects should have flowed proportionately more — but this is not observed.
Similarly, prehistoric obsidian blades should have lost their edge; this
is not observed either (although obsidian may have a different viscosity
from window
glass).[31]http://us.mc1110.mail.yahoo.com/mc/welcome?.gx=1.tm=1312996722.rand=9ju6qipj1sgsd#cite_note-Gibbs-30If
glass flows at a rate that allows changes to be seen with the naked eye
after centuries, then the effect should be noticeable in antique telescopes.
Any slight deformation in the antique telescopic lenses would lead to a
dramatic decrease in optical performance, a phenomenon that is not observed.
[31]http://us.mc1110.mail.yahoo.com/mc/welcome?.gx=1.tm=1312996722.rand=9ju6qipj1sgsd#cite_note-Gibbs-30There
are many examples of centuries-old glass shelving which has not bent,
even though it is under much higher stress from gravitational loads than
vertical window glass.
I still believe that glass cannot flow, but if it can it is a so slow
motion that we cannot appreciate it even in centuries.
Ciao.
Gian
Messaggio originale
Da: p.ta...@nhm.ac.uk
Data: 10/08/2011 17.45
A: John Carmichaeljlcarmich...@comcast.net, Kevin
Karneyke...@karney.com, John Pickardjohn.pick...@bigpond.com
Cc: Sundial Listsundial@uni-koeln.de
Ogg: RE: Flow of medieval glass
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- --
If you X-ray a piece of glass crushed to a powder, you get a lousy
Re: sundial Digest, Vol 68, Issue 24
I'm a bit in the dark. I don't know what the argument is. Is it glass in old houses ARE thicker at the bottom BUT this is not because glass is liquid. or Glass in old houses are NOT thicker at the bottom I have see lots in the debate whether glass is liquid or solid ( more molecular science than I understand) Howerver, I didn't see much to counter why many glasscutters have observed that old glass is thicker on the bottom. I have heard the arguement that glass was manufactured that way (100 years ago) when it was spun into disks before it was cut into panes. It was then installed with the thick side down because it was heavier. This arguement doesn't hold water. If all windows were square than this could happen. Some windows are rectangular. This would mean that sometimes the thicker end would be installed sideways because of the shape of the pain. On Tue, Aug 9, 2011 at 11:28 AM, Art Krenzel phoenix98...@msn.com wrote: Karon, I am going to stand up in the face of all the proof the list has offered that glass does not flow. As a working Chemical Engineer, I can tell you that the properties of glass depend upon the raw materials and the process used to make it. In the approximate 5000 years of glass production, some small glass manufacturer somewhere might have used some weird ingredient thinking it might enhance the overall quality or provide some new feature in the glass. This glass was installed in some location where it was observed to be inferior and deflected in the mounting. One absolute I can offer is that the formula for glass and the fabrication process has not been a constant over the 5000 year history of glass. To begin an urban legend, all that is required is one off-hand observation by an unqualified observer and 5000 years of history is stained (pardon the pun), Art Krenzel You would know this but most people don?t. glass is always a little bit liquid. Very old windows are slightly wider at the bottom than the top because the glass continues to flow over the years. Of course, that is not from experience working with glass, so you may debunk me, here, but it is something I read about in books about Vintage Homes back when I sold houses. Karon Adams --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Sundial generator, a little clarification
I would be interested in finding that site as well On Tue, Aug 9, 2011 at 1:12 AM, dsc...@igc.org dsc...@igc.org wrote: I remember coming across a web site that would allow you print a dial and gnomon after plugging in your polar coordinates. something for kids primarily. Dave Scott On 8/8/2011 9:51 AM, dsc...@igc.org wrote: A reporter from the Local paper here in Greenfield Ma. is writing an article about Sundials, he's looking for a user friendly sundial generator for is article, any suggestions? Dave Scott ---https://lists.uni-koeln.de/mailman/listinfo/sundial --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
analemmatic sundial
I have lots of analemmatic sundials pics. However, I can't find any in gardens. I'm after a pic. the more vegitation the better. Can anyone help? -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
sundial read from moonlight
I heard that a sundial will read the correct time with the shadow on the moon on a certain day. (full moon?) -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: sundial read from moonlight
Sorry I wasn't very clear with my question. I'd like to know how to read a horizontal sundial in the moonlight. I wish I could find the artical that I read on it. I'm going by memory so this is probably wrong but it went something like this: On a full moon, a horizontal dial reads correct. For each day after a full moon, 43 minutes must be addet to the time. Likewise, for each day before a full moon, 43 minutes must be subtracted to the time. On 7/31/11, Frans W. Maes f.w.m...@rug.nl wrote: Dear Donald, One can use the moon's shadow as long as it is distinguishable at night, say, one week either side of full moon. For an example, see: http://www.fransmaes.nl/genk/welcome-e.htm, choose menu item 7 and scroll down in the right-hand frame to The moon dial. Best regards, Frans Maes On 30-7-2011 10:23, Donald Christensen wrote: I heard that a sundial will read the correct time with the shadow on the moon on a certain day. (full moon?) -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Longitudinal shift, another way
The triangle on the horizontal sundial is parallel to the earth axis. The horizontal face is flat on the ground (or pedistal) and not in line with the axis A horiz dial will work on any lattitude in the same hemisphere (otherwise the numbers are backwards) as long as the triangle gnomen is inline with the earth axis. This means that the dial face must sit on a wedge to make this happen. Donald On 7/28/11, Richard B. Langley l...@unb.ca wrote: I bought such a sundial at a garden shop in Holland many years ago. When I got it home, I realized that it was designed for the southern hemisphere. Why it was being sold in Holland is a mystery. Probably for the same reason that a stationery store in Fredericton sold an atomic clock that could only receive the time signals from the German longwave station, well out of range of Canada! But the sundial is still usable if one installs the equatorial band upside down and stands on one's head to read it. ;-) -- Richard Langley Quoting Chris Lusby Taylor clusbytay...@enterprise.net: An armillary sphere can be used in either hemisphere. The only issue is that the hour numbers, if written with their base lines along the equatorial ring, will be upside down, but you could provide numbers facing both ways, one set either side of the centre of the hour band. Or, you could turn the numerals 90 degrees or even, as I did for an equatorial dial I made for Singapore, use non-numeric pips, as on playing cards, that can be read either way up. Chris - Original Message - From: David Bell To: ka...@karonadams.com Cc: sundial@uni-koeln.de Sent: Thursday, July 28, 2011 12:33 AM Subject: Re: Longitudinal shift, another way Create a uniquely crafted armillary sphere for your friend! It could pack in a table lamp sized box for those many moves. It can be truly universal and can be installed and adjusted for any location. The only tricky part would be if they were to be stationed on the southern hemisphere. You'd need to include two hour rings... Dave - | Richard B. LangleyE-mail: l...@unb.ca | | Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ | | Dept. of Geodesy and Geomatics EngineeringPhone:+1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | |Fredericton? Where's that? See: http://www.fredericton.ca/ | - --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Longitudinal shift, another way
The triangle on the horizontal sundial is parallel to the earth axis. The horizontal face is flat on the ground (or pedistal) and not in line with the axis A horiz dial will work on any lattitude in the same hemisphere (otherwise the numbers are backwards) as long as the triangle gnomen is inline with the earth axis. This means that the dial face must sit on a wedge to make this happen. Donald On 7/28/11, Donald Christensen dchristensen...@gmail.com wrote: The triangle on the horizontal sundial is parallel to the earth axis. The horizontal face is flat on the ground (or pedistal) and not in line with the axis A horiz dial will work on any lattitude in the same hemisphere (otherwise the numbers are backwards) as long as the triangle gnomen is inline with the earth axis. This means that the dial face must sit on a wedge to make this happen. Donald On 7/28/11, Richard B. Langley l...@unb.ca wrote: I bought such a sundial at a garden shop in Holland many years ago. When I got it home, I realized that it was designed for the southern hemisphere. Why it was being sold in Holland is a mystery. Probably for the same reason that a stationery store in Fredericton sold an atomic clock that could only receive the time signals from the German longwave station, well out of range of Canada! But the sundial is still usable if one installs the equatorial band upside down and stands on one's head to read it. ;-) -- Richard Langley Quoting Chris Lusby Taylor clusbytay...@enterprise.net: An armillary sphere can be used in either hemisphere. The only issue is that the hour numbers, if written with their base lines along the equatorial ring, will be upside down, but you could provide numbers facing both ways, one set either side of the centre of the hour band. Or, you could turn the numerals 90 degrees or even, as I did for an equatorial dial I made for Singapore, use non-numeric pips, as on playing cards, that can be read either way up. Chris - Original Message - From: David Bell To: ka...@karonadams.com Cc: sundial@uni-koeln.de Sent: Thursday, July 28, 2011 12:33 AM Subject: Re: Longitudinal shift, another way Create a uniquely crafted armillary sphere for your friend! It could pack in a table lamp sized box for those many moves. It can be truly universal and can be installed and adjusted for any location. The only tricky part would be if they were to be stationed on the southern hemisphere. You'd need to include two hour rings... Dave - | Richard B. LangleyE-mail: l...@unb.ca | | Geodetic Research Laboratory Web: http://www.unb.ca/GGE/ | | Dept. of Geodesy and Geomatics EngineeringPhone:+1 506 453-5142 | | University of New Brunswick Fax: +1 506 453-4943 | | Fredericton, N.B., Canada E3B 5A3 | |Fredericton? Where's that? See: http://www.fredericton.ca/ | - --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: solar compass
I found the Abrams Sun Compass. I incorrectly stated that it was an analemmatic sundial. Thank you for all that replied. Although I have a few photos of it, the one that I want most is the one that I can't find. I saw it on a link about 6 months ago on this forum. The background looked like it was military such as a b24 cockpit, or a tank. Perhaps it is in these replies. My roommate used up all the download and my internet is amazingly slow for the rest of the month. Therefore, I haven't looked at all the links-yet. Donald On 7/25/11, Simon [illustratingshadows illustratingshad...@yahoo.com wrote: This, albeit short, thread has been fascinating. As a naval reserve person, and as an airman later, I stick to the astro compass. The army types do deserve some credit for using methods other than those in use by the other services:) Donald, thanks for raising the topic. Simon Simon Wheaton-Smith www.illustratingshadows.com Silver City, New Mexico W108.2 N32.75 and Phoenix, Arizona, W112.1 N33.5 --- On Sat, 7/23/11, Donald Christensen dchristensen...@gmail.com wrote: From: Donald Christensen dchristensen...@gmail.com Subject: solar compass To: sundial@uni-koeln.de Date: Saturday, July 23, 2011, 5:20 AM A few months back on this forum, I saw a link to a photo of a solar compass. It was an analemmatic sundial that help direct ww2 bombers to their target. Does anyone know where I can find this link? Also, I'm after other stories similar -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
solar compass
A few months back on this forum, I saw a link to a photo of a solar compass. It was an analemmatic sundial that help direct ww2 bombers to their target. Does anyone know where I can find this link? Also, I'm after other stories similar -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
hi
I'm a member of this. My username and password were saved in memory on my computer. I have since re-loaded my computer. Now when I post a question, the forum doesn't know that I'm a member. How do I fix this? -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
multi dial
Does anyone have a picture of a multi-dial like the attached? The one that I have is way too small. (filesize) It won't print -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! attachment: multi dial.jpg--- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Old sundial pictures
Kevin I really like the St Petersburg one! the other black and white g792092 is another great one. Thank you. Does anyone have any older ones? A scanned image from a book will do. dchristensen...@gmail.com On 6/30/11, Kevin Karney kar...@me.com wrote: Hi Donald Any of these of any use? I personally love the Victorian lady picture (a memento mori - see what the gardner is carrying) and the one from St Petersburg palace with the communist apparatjik, showing the secret service man, the poor peasant and the school teacher how the dial works Where are you based ? I also lecture on the history of Sundials... -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: Old sundial pictures
Tony Thank you. That is exactly what I'm looking for! I'm still looking because I want more pics like the one you sent me. Dariusz You have an impressive website. Do you have any photos similar to the one Tony sent me? Donald On Tue, Jun 28, 2011 at 8:40 PM, Dariusz Oczki dhar...@o2.pl wrote: Hi Donald Just recently I have finished a new section on GNOMONIKA.pl dedicated to postcards, graphics and old photographs. Some of them are quite old so perhaps you will find there something interesting. Links: General - http://gnomonika.pl/historia.php?d=6 England - http://gnomonika.pl/historia.php?d=6kraj=EN (items: 66) Austria - http://gnomonika.pl/historia.php?d=6kraj=AU (items: 1) China - http://gnomonika.pl/historia.php?d=6kraj=CN (items: 1) Czech Republic - http://gnomonika.pl/historia.php?d=6kraj=CZ (items: 2) France - http://gnomonika.pl/historia.php?d=6kraj=FR (items: 79) Greece - http://gnomonika.pl/historia.php?d=6kraj=GR (items: 2) India - http://gnomonika.pl/historia.php?d=6kraj=IN (items: 2) Germany - http://gnomonika.pl/historia.php?d=6kraj=DE (items: 18) New Zeland - http://gnomonika.pl/historia.php?d=6kraj=NZ (items: 1) Poland - http://gnomonika.pl/historia.php?d=6kraj=PL (items: 424) Portugal - http://gnomonika.pl/historia.php?d=6kraj=PR (items: 4) Russia - http://gnomonika.pl/historia.php?d=6kraj=RU (items: 1) USA - http://gnomonika.pl/historia.php?d=6kraj=US (items: 3) Switzerland - http://gnomonika.pl/historia.php?d=6kraj=CH (items: 1) Here is a translation of Polish terms used there to describe each entry: Miejsce: town/village Obiekt: object with a sundial Wydawca: publisher Rok wydania: year of publishing Fot.: photographer Ilość zegarów na zdjęciu: number of sundials on the photo Walor: type (postcard, photograph, graphic) Data dodania: date of entry Opis: description on the card I hope this helps I'm putting together a presentation about the history of sundials. I'm primarily after history pictures of people interacting with the sundial. Do you know where I can find some? -- Best regards Darek Oczki 52N 21E Warsaw, Poland GNOMONIKA.pl Sundials in Poland http://gnomonika.pl -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Analemma in Verse
I love the poem Analemma in Verse by Tad Dunne Does anyone know where I can contact him? The latest info that I have on him is http://www.mail-archive.com/sundial@uni-koeln.de/msg11062.html His email doesn't work. Does anyone have a more recent contact info on him? -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Old sundial pictures
I'm putting together a presentation about the history of sundials. I'm primarily after history pictures of people interacting with the sundial. Do you know where I can find some? -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
perforated ring dial
Does anyone know where I can get software for a perforated ring dial. -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
standard meridian list
I'm trying to find a list of cities and the standard meridian they set their clock to. Example Brisbane - 150 deg east San Fransisco - 120 deg west Paris - 15 deg east London - 0 deg -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: upside down world
I was borne in the northern hemisphere and lived there for 22 years. I got use to reading maps where north is on top, south is on the bottom, west is on the left, and east is on the right. So far so good. I also got use to the equator is south of me, the ocean is west of me, and inland is to the right. Now I live in Brisbane Australia. The equator is north, the ocean is right, and inland is west and on the left (when facing north) We also drive on the wrong side of the road. For 3 years after my move, I kept mixing up right from left. I have been living in Australia for 24 years. Sometimes when someone gives me a ride, I walk to their car to the drivers seat thinking it's the passengers seat. It isn't easy to 'unlearn' the first 22 years of my life. When I draw a sundial for the southern hemisphere, I have to check it, check it again, re-check it, and build it. 6 months later I'll get disorientated again, look at the sundial that I built and second guess myself that I got it wrong. (I didn't) cheers Donald On Fri, Feb 18, 2011 at 9:06 AM, Peter Mayer peter.ma...@adelaide.edu.auwrote: Hi Brent, If you've not seen it before, you may enjoy the 'Universal Corrective Map' (pinched from: www.odt.org/southupmaps.htm) best wishes, Peter On 18/02/2011 01:30, Brent wrote: Hello again; For fun I removed my globe from its' frame and re-inserted it upside down. Now Antarctica is at the top. snip -- -- Peter Mayer Politics Department The University of Adelaide, AUSTRALIA 5005 Ph : +61 8 8303 5606 Fax : +61 8 8303 3443 e-mail: peter.ma...@adelaide.edu.au CRICOS Provider Number 00123M --- This email message is intended only for the addressee(s) and contains information that may be confidential and/or copyright. If you are not the intended recipient please notify the sender by reply email and immediately delete this email. Use, disclosure or reproduction of this email by anyone other than the intended recipient(s) is strictly prohibited. No representation is made that this email or any attachments are free of viruses. Virus scanning is recommended and is the responsibility of the recipient. --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
a ring dial
Does anyone know where I can get plans for this dial? http://www.karlrainerbirk.com/RING-SUNDIAL.html When I try to email the website, it asks me for a password -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: part 2 of longitude correction
Longitude correction I have been staring at equatorial sundials for so long that I forgot how a horizontal one works. This is why I suggested that you can rotate the face 3 deg if you are 3 deg difference from the standard meridian. I have since had a wake up call and learned/remembered that this is wrong. However, I still wouldn't leave it alone. It turns out that it is right. (well - kinda sorta) If you layout a horizontal dial by geometry, you can rotate the circle on top that looks like an equatorial dial (see attached file) before you project the lines down. Donald On Tue, Feb 15, 2011 at 4:11 AM, Simon [illustratingshadows illustratingshad...@yahoo.com wrote: My two cents. Dials that may be moved, I make those with no longitude correction, unless the person I make it for wants that correction. Dials that are too large to move I include the correction. I have to agree with Jogn Carmichael re the customer is always right, after all they pay the bills, and, it was my great grandfather who popularized that saying, he was Harry Gordon Selfridge:) Simon Simon Wheaton-Smith www.illustratingshadows.com Silver City, New Mexico W108.2 N32.75 and Phoenix, Arizona, W112.1 N33.5 --- On *Mon, 2/14/11, John Carmichael jlcarmich...@comcast.net* wrote: From: John Carmichael jlcarmich...@comcast.net Subject: RE: part 2 of longitude correction To: 'Frank King' frank.k...@cl.cam.ac.uk Cc: sundial@uni-koeln.de Date: Monday, February 14, 2011, 10:26 AM Hi Frank and Roger. I thought I'd respond to both of you letters since they are related... (Refer again to Time Zone Map: http://www.travel.com.hk/region/timezone.htm ) You’re right Frank about “westward creep” of many of the time zones. Most of our time zones in the US and Canada extend more to the west of their Prime Meridians than to the east. So as far as land area goes, there generally is more land area west of the Prime Meridians- (I don’t know if this extra land to the west also has more population in each zone since our population densities tend to thin out as you go west.) Looking at the map, check out your “westward creep” in Europe! The UK and Portugal are correctly colored yellow in the 0 degree zone, but the rest of Europe is all green- even countries that are west of your zone border like France, Belgium Holland and Spain. Look at the map of Canada, Roger. Your Eastern Time zone, in theory, should span from 67.5 deg W to 82.5 deg W. But it actually spans from about 62 deg W to 90 deg W! A definite westward creep over a 28 degree span. Your Mountain Time zone is even worse. Its Prime Meridian is at 105 deg W, but it spans from 102 way over to 137- That’s a 35 degree span that’s not even centered on the Prime Meridian! Strangely, the Prime Meridian is at the far Eastern edge of the Zone! All this Time Zone craziness is because local governments drew the time zone boundries. They tried to not isolate communities, states and provinces. They didn’t want time zone boundries to slice through populated areas. They often would zig zag them around cities and states. (The Constitution does not stipulate time zones as it was written before time zones were invented.) But as cities grow, their old time zone boundries often no longer go around communites, but through them. If it gets really bad, they have to re-draw the boundries. I don’t think this is done very often though because it just leads to more confusion. If your sundial is located far from its Prime Meridian in one of these crazy Time Zones, and you want it to give a time reading that is close to watch time, then designing it with built-in longitude correction is a must. If you forget about Daylight Saving periods, at worst, a longitude corrected dial will only be about 16 minutes off (because of the Equation of Time). On the average, it is only off by about seven minutes- good enough to keep most appointments! I know that I can glance at one of my sundials from a distance, and without using an EOT graph, that it is giving me a time that is very close to watch time. As Roger pointed out, a Solar Time dial doesn’t even come close. For public wall dials that can be seen from a great distance, the person reading the dial might be a half mile away from it- too far to read a little EOT plaque. Doesn’t it make sense to use a longitude corrected dial for public wall dials since the EOT graph is not availble to the far away users? John Carmichael John -Original Message- From: Frank King [mailto:frank.k...@cl.cam.ac.uk] Sent: Monday, February 14, 2011 3:44 AM To: John Carmichael Cc: sundial@uni-koeln.de; frank.k...@cl.cam.ac.uk Subject: Re: part 2 of longitude correction Dear John, Your inspiring message about longitude correction prompts more thoughts from me. You say: ... most of our [US] Time Zones have wiggly irregular boundaries that sometimes
longitude correction
How do I design a longitude correction in my sundial? Correct me if I'm wrong My horizontal dial is for Brisbane. The longitude is 153 deg and the standard meridian is 150. This is a 3 deg difference. I'll then rotate the hour lines by 3 deg to compensate -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
part 2 of longitude correction
I'm laying out lines for a new dial I may not have been clear. I don't intend to rotate the gnomen. The dial will still point true north By labeling 12:12 as noon and 13:12 as 13:00, I am rotating the hour marks. My question is, Is it by an even 3 deg? -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
