Andy's blog

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Rotating Earth orbiting the Sun

Submitted by Andy on Sat, 27/07/2013 - 22:52
Rotating Earth

This is a simple Earth and Sun model. This model is not to scale in terms of size and distance.

The rotation and revolution speeds are roughly to scale. The Earth in this model is rotating at 1 second per rotation. It is also revolving at 365 seconds per revolution.

The Earth has a tile of 23.5 degrees on its rotation axis to the orbiting plane. There are also some background stars (points). This model can be easily created using VRMath2 Editor. smiley

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Simple DNA Model

Submitted by Andy on Wed, 17/07/2013 - 14:23
DNA model

It was Wednesday, 17th of July. I met with a visiting scholar Xie Zuo Ru from China.  Xie is an awarding-winning high school teacher in the area of technology education. His research interests focused on the use of interactive media to promote science, technology, engineering and mathematics (STEM) education.  The interactive media refers to the small computers such as Arduino and Raspberry Pi that are affordable, programmable, and capable of transforming virtually any objects into input and output devices.  A wide range of interactive media applications such as turning a drawing of keyboard into a real keyboard or remote control of household appliances makes the teaching and learning fun and creative. He is also an expert in robotics and programming.

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Cayley graph 3D

Submitted by Andy on Sat, 13/07/2013 - 23:17
Cayley graph 3D

I was in the keynote session of AAMT conference. In the keynote, the mathematician Hanna Neumann was mentioned. I immediately googled and started reading about her on Wikipedia.

While reading, my thoughts are like the hyperlinks that go everywhere, then suddenly I saw and clicked into the Group theory, where I found the Cayley graph that caught my attention.

It is easily recognisable that this cayley graph is a fractal image, which can be produced with a simple recursive procedure in VRMath2's LOGO language.

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12 Tables

Submitted by Andy on Thu, 11/07/2013 - 14:51
12 tables

In this blog, I am trying to use an existing LOGO program in VRMath2 called table.logo, then see if I can create a couple of tables using repeat command.

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Recursive 2D fern leaf procedure

Submitted by Andy on Sat, 06/07/2013 - 20:15
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In my previous blog, I explained about a recursive tree procedure. Here is another one borrowed from Joshua's Logo Interpreter example: fern leaf procedure. This fern leaf procedure creates a 2D fern leaf in VRMath2's 3D space. You can examine it below in the 3D space with the LOGO program.