Yi-Yi
Edward Yang
“We never live the same day twice.”
So what’s the same
about yesterday and today?
Circumstances, behaviors and
systems that make them possible.
Connections
BBC, James Burke
Systems
Objects
can seemingly exist
in isolation physically,
but are actually often
connected to other things
through relationships.
Example:
Food (cheesesteak sandwich)
$6
Chapter 1
Systems
Elements
Interrelations
Function/Purpose
Systems
Stocks
Flows
Reading
Assignment
Skim Chapter 2
Read Chapters 3-6
Example
Systems
Personal Finances
Every month, Zulari is paid $2000 by direct
deposit to his savings account, and his
employer makes a contribution of $200 ...
What does this system look like?
Acid Rain
Rain of pH 3.5 periodically falls
on a pond that has a pH level of about 7.
After 6 months, the pond water pH
is still abo...
What does this system look like?
What could explain the behavior?
Metabolism
We regularly get energy from food,
and expend energy on various activities.
Albert running(to class)
90 Cal in 10 min
3/5 Twinkie
What does this system look like?
Boundaries,
mental and “actual”
Example:
Perfluorinated Compounds
Common Chemicals Could Make Kids'
Vaccines Less Effective
by JON HAMILTON
04:05 pm
January 24, 2012
The more exposure chil...
What can be thought of
as an isolated system
(manufacturing with PFCs)
is much more complex.
At least two (sub)systems:
Industrial Manufacturing
Human Immune System
And potentially many more:
Human Body
Ecosystems
Waste Management
Economic Systems
Example:
Environmental Impact of
a Water Treatment Facility
Systems, introduciton
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Systems, introduciton

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Slides for discussing example systems in the humans+the environment class.

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Systems, introduciton

  1. 1. Yi-Yi Edward Yang
  2. 2. “We never live the same day twice.”
  3. 3. So what’s the same about yesterday and today?
  4. 4. Circumstances, behaviors and systems that make them possible.
  5. 5. Connections BBC, James Burke
  6. 6. Systems
  7. 7. Objects can seemingly exist in isolation physically,
  8. 8. but are actually often connected to other things through relationships.
  9. 9. Example: Food (cheesesteak sandwich)
  10. 10. $6
  11. 11. Chapter 1
  12. 12. Systems Elements Interrelations Function/Purpose
  13. 13. Systems Stocks Flows
  14. 14. Reading Assignment
  15. 15. Skim Chapter 2 Read Chapters 3-6
  16. 16. Example Systems
  17. 17. Personal Finances
  18. 18. Every month, Zulari is paid $2000 by direct deposit to his savings account, and his employer makes a contribution of $200 to Zulari’s retirement account. He then moves some money from his savings account into his checking account to pay his rent ($800) and credit card bills (typically around $400) and the checking account fee ($10/month). If possible, Zulari moves some of the remaining money from his savings account to his retirement account. The rest he keeps in his savings account which has an interest rate of 1.5%.
  19. 19. What does this system look like?
  20. 20. Acid Rain
  21. 21. Rain of pH 3.5 periodically falls on a pond that has a pH level of about 7. After 6 months, the pond water pH is still about 7. After a year, the pond water pH has dropped to about 5.5.
  22. 22. What does this system look like? What could explain the behavior?
  23. 23. Metabolism
  24. 24. We regularly get energy from food, and expend energy on various activities.
  25. 25. Albert running(to class) 90 Cal in 10 min 3/5 Twinkie
  26. 26. What does this system look like?
  27. 27. Boundaries, mental and “actual”
  28. 28. Example: Perfluorinated Compounds
  29. 29. Common Chemicals Could Make Kids' Vaccines Less Effective by JON HAMILTON 04:05 pm January 24, 2012 The more exposure children have to chemicals called perfluorinated compounds, the less likely they are to have a good immune response to vaccinations, a study just Stig Nygaard/Flickr Even in the remote Faroe Islands, some children have high levels of perfluorinated compounds in their blood. The chemicals may interfere with the immune system. http://www.npr.org/blogs/health/2012/01/24/145745691/ common-chemicals-could-make-kids-vaccines-less-effective
  30. 30. What can be thought of as an isolated system (manufacturing with PFCs) is much more complex.
  31. 31. At least two (sub)systems: Industrial Manufacturing Human Immune System
  32. 32. And potentially many more: Human Body Ecosystems Waste Management Economic Systems
  33. 33. Example: Environmental Impact of a Water Treatment Facility

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