Tiny particles in the air can cause cancer.

Feynman said, Forget all of that.

This geo engineering idea, in it's simplest form, is basically the following.

What we do is actually put a standard HVAC filter on the top of that.

Nuclei and nuclear reactions, of course.

Tiny particles in the air can cause cancer.

The effect here in California is drought.

Minute particles are hardly visible to the naked eye.

And part of the geoengineering scheme is to say,

There's nothing special about America and the geography here that would not have the same effect as Asia and Africa.

Particles

Air... the ball's...

They have some deficiencies.

Film Grain

Just think of the proton as an assemblage, a swarm, of little particles.

The analogy is that these people in a room are the Higgs particles.

Number of particles

In the world of physics, they call appearance of the matter out of nothing,

What's that?

So, let's do this let me set N 1000 for 1000 particles.

And we came up with this analogy, and it seemed to work.

Air.

They don't really scale to high dimensional spaces.

Particle Fountain Screen Saver

Particle density

What's an elementary particle?

The Kalman filter is the only filter that does scale exponentially, so it's very nice.

In fact, it is completely uncertain as to where it is.

Now let's look into particle filters, the subject of today's class, and it's really interesting to see the answers for particle filters.

Particle Gravity Screen Saver

Particle size

One or both, who knows? Or it could be something completely different.

What I'll do next is to give you another program assignment.

And less sunlight reaching the surface would tend to cool the planet.

Four Particle beam. Check. Three.

(Laughter)

At the Biology and the Built Environment Center, we carried out a study in a hospital where we sampled air and pulled the DNA out of microbes in the air.

This is the essence of particle filters.

It looks like there's certain types of air in it, certain types of air particles, and depending on what type of air particles you're looking at whether it is carbon, or oxygen, or nitrogen, that seems to have different types of properties.

Either climate, uh, worldwide weather, or local weather, which is called micro climates.

Okay, so now if we look at precipitation, much has been made of this issue of, uh, damage from precipitation.

Add Film Grain...

Add film grain

Particle Fountain Setup

Let me play this again.