Oh yes, a week ago!

Last Sunday we went for a walk with Kit.  We went out to Shepherd's lookout, then walked all the way down to the river.

Work was pretty busy this week.

Wednesday morning I woke up with a cold sore.  Yay.  Thursday Stu was sick with a cold, went to work for the last half day of training, but took Friday off.  

Thursday Neil and I did 7ks of walking at lunch.  His knees were not thanking him afterwards for that!

Friday had lunch with the Chrises which was nice.  In the evening just watched some Voyager with the sweetie and got some very nice Mills and Grills pizzas.

I've spent the past few weeks working on a new blog - a blog about the Queen Mary 2.  I posted nearly all the photos I took of the ship herself, separating them out into the different areas of the ship.  It's a bit more mobile friendly than my main blogs (which I really need to convert, but only after a lot of testing and a well documented procedure).  Stu reckons I should put Google ads on it, but apart from them being a pain, they'd also lower the tone of the whole site heh.

Anyways, here it is: Kazza's Queen Mary 2 Blog.  Please have a look and let me know if you find any issues.

Wednesday night a bunch of us went over to Kit's for her birthday and we got some epic pizzas from Mills and Grills.  I'd never actually heard of them.  Turns out they replaced Encore pizza at some point.  Mills and Grills do a "New York" sized pizza which is *enormous* !!  

Friday night was the year's first swim night, and afterwards a bunch of us went back to EffanC's for champagne (including some real champagne!) and cheese and some of C's wonderful soups.

Yesterday was mainly just tidying the house, jigsaw and working on my cruise blog.  In the evening Kit came up to do some scanning and work on her resume with Stu.  We were going to get pizza but she brought up a bunch of leftovers which more than sufficed for dinner.

IMosaic

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Way way back in 2004 I played with a photo-mosaicing application called Mazaika.  Back then I only had about 11000 photos.

But in the past week or two I've been doing a photomosaic jigsaw of Kit's, and it's rekindled my interest in photomosaics.

I had a look on the weekend for apps to try, and gave IMosaic a go.  It's quite old - no new releases since 2006, it's pretty slow, and it squishes vertical photos down to landscape mode, but it is free and does have the ability to index different directories independently, rather than as one massive index.  

So I indexed all my last holiday photos (6687 photos), and used them to create a photomosaic of the Queen Mary 2 (image from Wikpedia).

Queen Mary 2 Photomosaic Original

Queen Mary 2 Photomosaic

Here's some closeups of some areas

Queen Mary 2 Photomosaic

Queen Mary 2 Photomosaic

Queen Mary 2 Photomosaic

Fun times!!

Kit's 30th

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Saturday I spent most of the morning getting ready and cooking for Kit's 30th birthday party.  It was family-friendly for the afternoon, including pony rides!!  In the evening after dinner we got picked up by the party bus for a pub crawl, stopping at The Ducks Nuts, The Durham, and PJ O'Reilly's in Tuggeranong.  I had a pretty good time while some of the others got suitably silly hehe.  The 80s music collection on the bus was pretty pitiful though, I struggled to find good stuff to play.  There will be photos of my outfit soon.. :)

Sunday was just housework, jigsaw etc, and I helped clean up a little bit.  Kit had *heaps* of leftover food which various people including us are helping her with heh.

Which reminds me, *last* Thursday night we had Damien and Amanda over for dinner (bolognase) and I inflicted them with our slide show ;)

I spent all of tonight in front of the tv finishing my costume for Kit's party.  Hope she likes it!

In other news, Stu got Splunk working here and gathering our router stats etc.. fun times :)

Flowers

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James and Rachel were down on the weekend to make flowers.  No really.  Icing sugar flowers that Rachel is going to put on Marc's wedding cake.  :)

So they came down Friday night and did their two day course.  I cooked chicken fettuccini boscaiola on Saturday night and inflicted them with our slide show ;)

This week has been crazy busy both at work and at home.  Is it Thursday yet?

So the dodecahedron and the icosahedron are dual solids.   The icosahedron has 20 faces and 12 vertices, while the dodecahedron has 12 faces and 20 vertices.  It means that if you truncate either one of them to the same point, you send up with the same shape - the icosidodecahedron.

I made the paper solid from a net from korthalsaltes.com..

Paper icosidodecahedron

And I made the paper geodesic version from Vince Matsko..  (If using his nets, you will need three pages of the pentagons, and one page of the triangles.  The tabs for the five triangles making up each pentagon will go in the middle.  The triangle is equilateral so doesn't matter where you put the tab).

Paper geodesic icosidodecahedron

Here's the two of them together..

Icosidodecahedrons

Four frequency paper geodesic icosahedron

Over the past few weeks I've been making the paper geodesic icosahedron pictured above.

As with all my other balls in the past few months, I got the nets from Vince Matsko's website.  The problem with this model is his instructions aren't very useful if you don't have Magnus Wenninger's Spherical Models book:  

Not so challenging as its 8-frequency companion, this model requires just 320 individual spherical triangles of 5 distinct types. Bands are labelled numerically as in Figure 48 (p. 95) of Wenninger's Spherical Models. Although not individually labelled, the bands adhere to the following scheme: in Table 4, the arc in the third column of the list of bands is always next to the tab. You can easily check this by noting that in a circle, larger angles subtend larger chords, so you can measure chords to find out which angle is which.

The finished model will be approximately 14 inches (36 cm) in diameter.

Vince's net pdf document contains bands for the five different triangles.  But without Wenninger's book, you've got no way to know which band is which.  So here's one I prepared earlier:

Four frequency icosahedron instructions from Wenninger

You can see from the diagram there are five different shaped triangles, numbered 1 to 5.  This matches the pdf document on Vince Matsko's site.  Also take note of the lettering - letters a to d indicate the length of each side (remember these aren't equilateral triangles!  see Wenninger's book for more details on the mathematics of it).

The next line of instructions:

Although not individually labelled, the bands adhere to the following scheme: in Table 4, the arc in the third column of the list of bands is always next to the tab.


Again, without the book you've got no hope.  And even if you do have the book, it can take a while to figure out what he actually means.  Eventually I figured it out.  Here's the table he's talking about:

Four frequency icosahedron instructions from Wenninger

Highlighted on the right is the "third column" he's talking about.  If you look at the first picture from the book further up, you can see that triangle number 1 has "a", "a", and "b" as the lengths of its bands.  And triangle 2 has "b", "d" and "d".  And so on.  The table above shows this as well.  Now, in the table above, what he's saying is that the "tab" in the printouts is always next to the letter in the third column.  So for triangle 1, in his pdf it will be a-b-a-tab.  Triangle 2 will be d-b-d-tab, and so on.  Here's what it will look like:

Four frequency icosahedron bands

You'll note above that triangle 3 is asymmetric (look at the big triangle at the top to confirm this).  Half the triangles are "left-handed" and half are "right-handed".  If you were to print out all the copies of triangle 3 and fold them the same way it wouldn't work.  

Here's the diagram from the book, but also showing the locations of the tabs once it's all put together, and showing left and right handed triangle 3.

Four frequency icosahedron instructions from Wenninger

Now the triangle above is just one "face" of an icosahedron.  Remember an icosahedron has twenty sides.  So you will need 60 bands for triangle 1, 60 for triangle 2, 120 for triangle 3 (60 left-handed and 60 right handed), 60 for triangle 4 and 20 for triangle 5.  Using Vince Matsko's nets that's 10 pages for 1, 2 and 4, 20 pages of 3, and 3.3 pages of 5 (4 pages with a couple of leftovers).

But.  If you were to print out the nets on A4 paper, the ball would be *huge* - double the size he says in his instructions.  So I resized the images and pasted them into a word document.  While I was at it, I flipped a copy of triangle 3 so the black lines would always be on the outside.  Attached is my word doc with the nets that I used.  It includes instructions on how many of each triangle you will need.

Right.  So now we've got the design sorted, let's get started.

I printed each triangle on a different coloured piece of paper.  And for triangle 3, I did the left and right handed triangles on different coloured paper (blue and green).

Four frequency icosahedron paper

Next, cut them up.  Each one took about thirty five seconds to cut.

Once they're cut, fold them up.  I folded them so that the black line from the printout would always been on the outside.  Each one took about twenty five seconds to fold.  I did most of this in front of the tv.

Four frequency icosahedron bands folded

Once they're glued into triangles (each one took about fifteen seconds), you can lay them out to see what they will look like before gluing.

Four frequency icosahedron triangles

I started a production line - got all sixteen little triangles for each face and put them together.

Four frequency icosahedron production line

Four frequency icosahedron production line

Then I put them together in the correct configuration, with all the tabs in the correct locations.

Four frequency icosahedron production line

And then glued them all together.  Here's all twenty faces glued:

Four frequency icosahedron production line

Now for the really fun part - gluing all twenty faces together into a ball!

Four frequency icosahedron with five faces glued

Four frequency icosahedron half way

Four frequency icosahedron half way

With six faces to go, it will fit quite nicely over your head.. ;)

Four frequency icosahedron helmet

And finally, we're finished!

Four frequency paper geodesic icosahedron

A very time consuming, but quite impressive effort :)

Making Stuff

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I've been making stuff.  All to be revealed soon :)

I was making stuff instead of cooking tonight, which means I'm going to need to get up early in the morning.. oh well..

Have also done a few entries on my new blog.  Again, all to be revealed soon!

To much to do, too little time.  Can I retire now?  I could really use another eight hours a day to get stuff done...

Kazza's "Boring Life Of a Geek" aka BLOG

IT geek, originally from Sydney, moved to Canberra in 2007. Married to "the sweetie", aka Stu. Prolific photographer, Lego junkie and tropical fish keeper.

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