Notes on a web journey

posted on: 19 May 2010

Nature by Numbers

filed under: @ 09:14:08

Artists and architects have used since ancient times many geometrical and mathematical properties...many of these properties and mathematical developments are also present in NATURE.



posted on: 23 February 2007

Penrose tilings

filed under: @ 19:22:51

The complex geometrical designs used centuries ago in Islamic art and architecture were planned with a tiling system that was not discovered in the West until five centuries later, two physicists have claimed.

Islamic tiles reveal sophisticated maths


posted on: 24 December 2006

The Poincare Conjecture

filed under: @ 11:03:06

Science's 2006 Breakthrough of the year and runners up:

Special Online Collection: Breakthrough of the Year 2006


posted on: 11 September 2006

The Strouhal Number: swimming and flying

filed under: @ 19:40:07

Flight waveform of the Common Sheathtail Bat
Flight waveform of the Common Sheathtail Bat

Animals swimming or flying at cruising speed use similar ratios of stroke frequency and amplitude to forward speed. For dolphins, sharks, and bony fish moving at their preferred cruising speed, the ratio of tail frequency and amplitude to forward speed is constrained to a narrow but efficient range of values.

The Strouhal Number in Cruising Flight

Part of, a series of experimental data graphics.
(published by 13pt)


posted on: 18 April 2006

Poetry and the Fibonacci sequence

filed under: @ 09:07:19

On Collision Detection: "The Fib"


posted on: 11 April 2006

Fractal recursions

filed under: @ 20:07:43

Very nice fractal recursions


CSS,Javascript and Php studies

Anti spam email
A solution to writing an anti spam email contact link
filed under: Javascript
Background image
A background image randomizer that I used in the second version of this site.
filed under: Javascript/CSS
Javascript menu
A menu that uses Javascript and session cookies.
filed under: Javascript/CSS
Experimenting with CSS and Javascript.A simple but, in my opinion, nice navigation “system”. The MiniSite is a one page site.
filed under: Javascript/CSS
Photo display
Protect copyrighted photos: a simple but effective solution.
filed under: Javascript/CSS
Photo gallery
A photo gallery made for a friend
filed under: Javascript
PHP menu
A PHP menu that can be updated without having to re-publish all the pages is on.
filed under: PHP
Pop-up menu
A very simple pop up menu powered by Javascript. It works also if Javascript is disabled.
filed under: Javascript/CSS
RSS feed
How to write and use an RSS feed
filed under: rss-xml
Tag replacer
The Tag replacer explained and a link to it.
filed under: PHP
Tags search
A search form build and powered using Javascript and the DOM
filed under: Javascript