Hi... sorry, I seem to be having severe writer's block against cranking out new lectures. It's not that I don't love you folks anymore - I do, and I'm having some interesting conversations here. It's just something about figuring out what to do lecture about next, and how to do it. Writing is always a mind game. I'm pretty good at writing a lot, but sometimes I really have to fight myself.

I _almost_ overcame my resistance today, but I had to write a blog article about the work I'm doing with Metron on the [Complex Adaptive System Composition and Design Environment](https://www.darpa.mil/program/complex-adaptive-system-composition-and-design-environment) project, to help convince the people at DARPA that we're doing good work, and that seems to have sucked out today's supply of energy.

I will try again tomorrow morning.

Anyway, here is that blog article:

* [Complex adaptive system design (part 8)](https://johncarlosbaez.wordpress.com/2018/08/22/complex-adaptive-systems-part-8/).

It's about some new work John Foley and are doing... a continuation of the earlier work described here:

* [Part 1](https://johncarlosbaez.wordpress.com/2016/10/02/complex-adaptive-system-design-part-1/). CASCADE: the Complex Adaptive System Composition and Design Environment.

* [Part 2](https://johncarlosbaez.wordpress.com/2016/10/18/complex-adaptive-system-design-part-2/). Metron’s software for system design.

* [Part 3](https://johncarlosbaez.wordpress.com/2017/08/17/complex-adaptive-system-design-part-3/). Operads: the basic idea.

* [Part 4](https://johncarlosbaez.wordpress.com/2017/08/22/complex-adaptive-system-design-part-4/). Network operads: an easy example.

* [Part 5](https://johncarlosbaez.wordpress.com/2017/09/04/complex-adaptive-systems-part-5/). Algebras of network operads: some easy examples.

* [Part 6](https://johncarlosbaez.wordpress.com/2017/10/31/complex-adaptive-systems-part-6/). Network models.

* [Part 7](https://johncarlosbaez.wordpress.com/2018/02/19/complex-adaptive-systems-part-7/). Step-by-step compositional design and tasking using commitment networks.

There, that should give you something to read about applied category theory until tomorrow!