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Andy's picture

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

xiezuoru's picture

魔比斯环

Submitted by xiezuoru on Fri, 26/07/2013 - 23:45
Mobius ring

魔比斯环也称麦比乌斯圈。麦比乌斯圈(Möbius strip, Möbius band)是一种单侧、不可定向的曲面。因A.F.麦比乌斯(August Ferdinand Möbius, 1790-1868)发现而得名。将一个长方形纸条ABCD的一端AB固定，另一端DC扭转半周后，把AB和CD粘合在一起 ，得到的曲面就是麦比乌斯圈，也称麦比乌斯带。

Knoblauch's picture

An attempt at using recursion

Submitted by Knoblauch on Mon, 22/07/2013 - 23:29
Cayley graph

All of my projects to date have required step by step instructions (some upwards of 300 lines of code!), so I decided to have a go at working out how to create a recursive code. After studying "Cayley graph 3D" working out in my head how the code was constructed, I was finally able to start my own. The following is based on an image of 

Cayley Graph of the Free Product Z3 * Z5

After much trial and error I was able to develop ...

Andy's picture

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.

Knoblauch's picture

Snub dodecahedron

Submitted by Knoblauch on Sun, 14/07/2013 - 23:28
Snub dodecahedron

The Snub dodecahedron has 92 faces (12 pentagons, 80 equilateral triangles), 150 edges,  and 60 vertices.