David O'Reilly on animating movement

I think the bit on movement trajectories in animation is brilliant. Natural human movements also follow this kind of smooth trajectory; studies of motor planning (eg here) have found that this sort of movement is optimally designed to minimize energy expenditure. It’s so great when artists figure out how to convey different feelings just by making these subtle tweaks to the textures and physics of the real world, I think it can really tell us a lot about our own perception.

Also: vectorpunk? Seriously, BoingBoing? Vectorpunk.

Belousov-Zhabotinsky Reaction

And speaking of oscillations, here's a nice video of the Belousov-Zhabotinsky reaction in a petri dish:

(The video info for the above also has a nice description of waveforms in the brain which is worth reading.) You can see someone setting up the reaction (ie pouring some chemicals together and stirring, really) here.

The BZ reaction is an example of a chemical oscillator, a system which instead of arriving at a steady state transitions between two different chemical states (which two states have two different colors, whence the waves above). Boris Belousov discovered it in the 1950's when he happened to mix together potassium bromate, cerium(IV) sulfate, propanedioic acid and citric acid in dilute sulfuric acid (hell, why not?); he made two attempts to publish his findings, but was rejected from peer-reviewed journals because he couldn't explain why the oscillations occurred.

Population dynamics in Yemen

From the beginning of T.E. Lawrence's Seven Pillars of Wisdom comes an account of how population and cultural forces drove human geography in early 20th-century Yemen. I have no idea how realistic this account is, but as an engineer I think it's kind of inspiring to see this kind of systems-minded analysis used to describe complex human behavior-- and so poetically, at that.

In Yemen the solution was different. There was no foreign trade, and no massed industries to accumulate population in unhealthy places. The towns were just market towns, as clean and simple as ordinary villages. Therefore the population slowly increased; the scale of living was brought down very low; and a congestion of numbers was generally felt. They could not emigrate overseas; for the Sudan was even worse country than Arabia, and the few tribes which did venture across were compelled to modify their manner of life and their Semitic culture profoundly, in order to exist. They could not move northward along the hills; for these were barred by the holy town of Mecca and its port Jidda: an alien belt, continually reinforced by strangers from India and Java and Bokhara and Africa, very strong in vitality, violently hostile to the Semitic consciousness, and maintained despite economics and geography and climate by the artificial factor of a world-religion. The congestion of Yemen, therefore, becoming extreme, found its only relief in the east, by forcing the weaker aggregations of its border down and down the slopes of the hills along the Widian, the half-waste district of the great water-bearing valleys of Bisha, Dawasir, Ranya and Taraba which ran out towards the deserts of Nejd. These weaker clans had continually to exchange good springs and fertile palms for poorer springs and scantier palms, till at last they reached an area where a proper agricultural life became impossible. They then began to eke out their precarious husbandry by breeding sheep and camels, and in time came to depend more and more on these herds for their living.
Finally, under a last impulse from the straining population behind them, the border people (now almost wholly pastoral) were flung out of the furthest crazy oasis into the untrodden wilderness as nomads. This process, to be watched to-day with individual families and tribes to whose marches an exact name and date might be put, must have been going on since the first day of full settlement of Yemen. The Widian below Mecca and Taif are crowded with the memories and place-names of half a hundred tribes which have gone from there, and may be found to-day in Nejd, in Jebel Shammar, in the Hamad, even on the frontiers of Syria and Mesopotamia. There was the source of migration, the factory of nomads, the springing of the gulf-stream of desert wanderers.

Swine Flu Aftermath in Egypt

Hmm, and Egypt is now dealing with the repercussions of their decision during last May's swine flu panic to cull over 300,000 pigs in the country: before the cull, the zabaleen were Christian pig-farmers living on the outskirts of Cairo and other cities who went door to door collecting trash, which they either sold to recycling facilities or fed to their pigs. Now that they've been driven out, the streets of Cairo are filling with excess garbage which the city lacks the infrastructure to handle properly, creating a health hazard far worse than the flu itself.