1. 1 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.1 Chapter 2

2. 2 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.2 Chapter 2

3. 3 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.3 Chapter 2

4. 4 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.4 Chapter 2

5. 5 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.5 Chapter 2

6. 6 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.6 Chapter 2

7. 7 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.7 Chapter 2

8. 8 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.8 Chapter 2

9. 9 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.9 Chapter 2

10. 10 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.10 Chapter 2

11. 11 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.11 Chapter 2

12. 12 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.12 Chapter 2

13. 13 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.13 Chapter 2

14. 14 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.14 Chapter 2

15. 15 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.15 Chapter 2

16. 16 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.16 Chapter 2

17. 17 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.17 Chapter 2

18. 18 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.18 Chapter 2

19. 19 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.19 Chapter 2

20. 20 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.20 Chapter 2

21. 21 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.21 Chapter 2

22. 22 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.22 Chapter 2

23. 23 Copyright © 2010, Elsevier Inc. All rights Reserved Fig 2.23 Chapter 2