"John Doyle"
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Convergent networking: the
promise
Convergent networking: the
reality
Elements of systems
Two great abstractions of
the 20th Century
Tower of Babel
Biology and advanced
technology
Communications and computing
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"From"
Theoretical foundations
Uncertainty management
Control theory
Information theory
Computation complexity
Software correctness
Multiscale physics
Unified theory of
uncertainty management
Progress
Bonus!
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Web/internet traffic
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Robustness of HOT systems
Large scale phenomena is
extremely non-Gaussian
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The physics view
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The HOT view of power
laws
(w/ Jean Carlson, UCSB)
The HOT view of power laws
HOT and fat tails?
Examples of HOT fat tails?
Examples with additional
mechanisms?
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Source coding for data
compression
Source coding for data
compression
Shannon coding
Shannon source coding
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Coding = building barriers
Control = building barriers
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"Compressed files look
like white..."
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Why is this a good model?
Web layout as generalized
“source coding”
A toy website model
(= 1-d grid HOT design)
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More complete website
models
(Zhu, Yu, Effros)
Generalized “coding”
problems
PLR optimization
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PLR optimization
PLR optimization
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More complete website
models
(Zhu, Yu, Effros)
The broader Shannon
abstraction
What can we keep?
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"Two types of
application traffic..."
"Separate source and
channel coding"
"Packet loss can be
handled..."
Optimization/control
framework
Optimization/control
framework
Optimization/control
framework
Scalable Congestion Control
Robustness,
evolvability/scalability, verifiability
Robustness of HOT systems
Feedback and robustness
The Internet hourglass
The Internet hourglass
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The hourglass
Energy
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