largely in social networks.

These are the hubs of social networks.

Social Networks Visualisation and Analysis.

We became much more social. The social networks expanded.

It's already immersed in social networks.

Social networks come in many different flavors.

Michael Are you familiar with social networks?

And it is related to social networks.

Why are we embedded in social networks?

Michael So, are you familiar with social networks?

Social networks have been around as long as there've been people forming communities but the modern study of social networks is different because it's now possible to put together social networks that include data on millions of people.

On social networks like Twitter, Facebook, YouTube, Google , Flickr...

Can you tell us what you know about social networks?

Maybe there are emotional stampedes that ripple through social networks.

Similarly, social networks are required for the spread of good and valuable things,

Maybe the fundamental causes of human social networks are somehow encoded in our genes.

Unit four explores the notion of statistics, numbers that summarize complex structures like social networks.

It's now about connecting to your communities, connecting to your social networks.

Let's go out on the street and ask people about social networks.

Our printing press is the Internet. Our coffee houses are social networks.

Well, the striking patterns of human social networks, their ubiquity and their apparent purpose beg questions about whether we evolved to have human social networks in the first place, and whether we evolved to form networks with a particular structure.

At the same time, we're going to develop a feel for the kinds of graph networks that are really important in analyzing social networks.

What's your sense of what social networks are like in other countries outside the United States?

I think we form social networks because the benefits of a connected life outweigh the costs.

So the spread of good and valuable things is required to sustain and nourish social networks.

One particular family of networks is called chain networks.

Now, this is an actually very useful metric for real life social networks.

In some countries there are other social networks that are very big there.

The problem, however, is that mapping human social networks is not always possible.

Why don't we form human social networks that look like a regular lattice?

New properties emerge because of our embeddedness in social networks, and these properties inhere in the structure of the networks, not just in the individuals within them.

So to invoke another metaphor, if you imagine social networks as a kind of vast fabric of humanity

Barack Obama won (Applause) because he mobilized people as never before through the use of social networks.

Because of differing bandwidth constraints, you have some social networks more used in some countries than others.

Because human social networks, whenever they are mapped, always kind of look like this the picture of the network.

Actually, we host team based competitions where we pitch social networks against each other.

A torrent of peer to peer social networks and real time technologies, fundamentally changing the way we behave.

Bryan Burns of Juniper Networks

I think, in fact, that if we realized how valuable social networks are, we'd spend a lot more time nourishing them and sustaining them, because I think social networks are fundamentally related to goodness.

Duncan Watts is one of the world experts in analyzing social networks and learning about what's going on inside of that.

So, in some social networks, it's useful to know, are there any edges in this graph?

So what's actually happening is that social networks and real time technologies are taking us back.

Available networks

Use networks.

Can you say a little bit about how social networks fit into the history of the use of technology in political protests?