-
|
|
|
|
|
I. Spatial Diffusion
A. Diffusion defined.B. Diseases are not the only phenomena that spread through space and time. The concept also applies to cultural traits and innovations.
C. Types of diffusion
- Relocation
- Expansion
- (The distinction between relocation and expansion diffusion keys on whether the number of adopters is expanding)
D. Temporal regularities
S-curve
- Innovators
- Majority adopters
- Laggards
E. Spatial regularities in diffusion
- Contagious effects
- Hierarchical effects
- urban hierarchy
- Disentangling contagious and hierarchical diffusion. Usually both are at work in any situation.
F. Barriers or facilitators of diffusion
- Physical
- Language
- Cultural
- Political
- Transportation
G. Biased innovations
II. Examples of diffusion
III. Background on AIDS
A. What is AIDS?
- Acquired Immunodeficiency Syndrome
- Caused by HIV virus
- Mechanisms of transmission—not just via homosexual activity
B. AIDS in Africa
1. Origin through zoonosis (disputed by some researchers)2. Very high rates in Africa
3. Factors causing high rates in Africa
(Right click on image then select "View Image" to enlarge)
- Spread along trade and migration routes
- Heterosexual transmission
- Postcolonial development patterns causing migrant work, prostitution
- Poverty, famine, war are perceived as graver threats
- Ignorance and misinformation
4. Devastating effects of AIDS in Africa
- Shortened life expectancies
- Attacks adults in their prime, increases dependency ratio
- (Right click on image then select "View Image" to enlarge)
- Diverts resources from development needs
- Orphans
- Young women are hardest hit
C. Ingredients of successful anti-AIDS policies
- Condoms
- Antiviral drugs for expectant mothers
- Female empowerment
D. Global pathways and global hotspots
(Right click on image then select "View Image" to enlarge)
- Haiti
- New York, California, Miami
- Thailand
- Western and Eastern Europe
E. Current situation in the United States
- Stabilizing rate of new infections
- Growing complacency due to new treatments
INSTRUCTOR:
E-Mail instructor: mhealy@harper.cc.il.us
Office: J-262, 847-925-6352
Home: 815-728-1571
