# [Etoys] Upcoming talk

K. K. Subramaniam subbukk at gmail.com
Sun Jun 1 15:42:07 EDT 2008

```On Friday 30 May 2008 9:02:07 pm Joe Apuzzo wrote:
> But does anyone have any suggestions for math and science? aka something
> that
> I can build on the fly and show a topic that a Middle School or High
> School teacher
> would do in class?
Attached are two ideas that can be initiated in Squeak.

In Vibrations, the cockroach moves around in circles while the spring moves up
and down. Record the cockroach's y variation and then that of the spring.
Once the similarity sinks in, record the sum of both offsets.

Seed Growth illustrates tree structures may grow out of small seeds by
applying simple rules repeatedly at various levels. Environmental causes like
sunlight, rain, insects can introduce growth variations.

Architecture follows up on the growth story. The sequence 1,2,3,4 is
one-dimensional while 1,2,2^2, 3^2 is two dimensional and then there are
structures which grow in fractions - 1, 2^1.58, 3^1.58.

Followups on periodicity, symmetry and self-similarity could involve studying
trees, human bronchii, African hairstyles and village layouts, Indian kolams
and mehendi designs.

Subbu
-------------- next part --------------
A non-text attachment was scrubbed...
Name: seedgrowth.jpg
Type: image/jpeg
Size: 99029 bytes
Desc: not available
Url : http://lists.laptop.org/pipermail/etoys/attachments/20080602/d2238526/attachment-0003.jpg
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vibrations.jpg
Type: image/jpeg
Size: 133185 bytes
Desc: not available
Url : http://lists.laptop.org/pipermail/etoys/attachments/20080602/d2238526/attachment-0004.jpg
-------------- next part --------------
A non-text attachment was scrubbed...
Name: architecture.jpg
Type: image/jpeg
Size: 63373 bytes
Desc: not available
Url : http://lists.laptop.org/pipermail/etoys/attachments/20080602/d2238526/attachment-0005.jpg
```