The increasing urbanization of many parts of the world coupled with other global issues such as environmental pollution, energy consumption, and resources shortage are resulting in major urban crises in many parts of the world. In an effort to explore and map the challenges and opportunities of sustainable development, Department of Architecture and Urban Planning at Al-Fateh University and the Center for the Study of Architecture in the Arab Region (CSAAR) have joined together to organize an international conference on sustainable architecture and urban development.

you said: “Especially given the by-now-clichéd recognition that we’ve decisively become an urban species”

It is indeed very interesting to think about urban systems design given there was a major move toward cities. That said I have the feeling that this move comes with, at least, three issues:

1. access to the “thought” urban environment,

2. the space left where 50% of the population is still living,

3. the space of this growth

There are many areas in the world where the growth of the cities is made by people without access or a limited access to the thought urban environment. Poor people living in slums or just in a space which is not part of the work of urban planner per say. In a recent exhibition about slums I went, it was very interesting to see that the organic structure of the slums was making possible for the individuals to create a rich and meaningful space, driving sometimes to less criminality than more traditional areas of the city. The slum is a forced collective creative space for survival.

The rest of the population, the 50% living in deserted areas are the forgotten of this story. It’s indeed more “fun”, interesting for researchers, sociologists to observe and think about the density in urban space (richness of interactions) more than the low level of activities in the “countryside”. Though there are equal challenges there in terms of design and space organization, access to services, etc.

Finally, is it really cities which are growing? What we call urban space often relates to the city center, but I have the feeling that the growth is happening in the in-between space (suburbs), which is again a complete disaster in terms of design, even more so in rich countries. The private space is becoming a space of non-creativity, dead areas of non activities. Someone, who wants to start a small business in between two buildings on the grass of a random suburb of a rich city, will not last for very long. Complete different dynamic than the slum where unregulated areas give the opportunity of creative solutions for surviving or living.

Great circles are straight lines that go all the way around the center of the earth. The equator is a great circle. Meridians of longitude that cross over the north and south poles are also great circles. For every location on a great circle, it's antipodal location is also on the circle. Other than the equator itself, any great circle crosses the equator at two antipodal locations, 180° apart. Other than the equator and meridians of longitude that run due north and south, any great circle reaches it's maximum latitudes at two locations that are 90° of longitude east and west of the two locations where the great circle crosses the equator.

This is the first of two posts that will center around a modern browser engine feature that doesn’t usually get a lot of press: The Page Cache.