1 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.1 Chapter 6

2 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.2 Chapter 6

3 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.3 Chapter 6

4 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.4 Chapter 6

5 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.5 Chapter 6

6 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.6 Chapter 6

7 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.7 Chapter 6

8 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.8 Chapter 6

9 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.9 Chapter 6

10 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 6.10 Chapter 6