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On Brains and
 Computing
  Anthony Hsiao
  SapnaSolutions
About Me
„
“     The Brain
          –
My second most favourite
        organ!

    (Woody Allen, Director)
Context
Neuroscience is the scientific study of the
 nervous system
Informatics is the science of information, the
  practice of information processing, and the
  engineering of information systems

Neuroiformatics
Neuromorphic Engineering
The Brain in a Nutshell
             Complex network of
              Neurons
              Synapses
             Distributed
              Brain
              Sensors
              CNS
              Stomach
Neurons – Computation
          Concentration
          gradient of Ions
           K+, Na+,Ca2+
          Action Potential
          Electrical



          Performs 'Sum'
Synapses - Memory?
          'Gap' between two
          interconnecting
          Neurons
          Transmits AP
          Varying Efficacy
          Action Potential
          Chemical
          Performs 'Weighting'
The Amazing Brain
Simple repeated pattern:
 Concentration difference of Ions in a liquid
 Many Neurons > Many other Neurons
Giving rise to:
 Emotions
 Thought
 Sensation
 Realities
Quick Comparison:
Brain and Computers
                Brain                 Computer
                Distributed,
                                      Centralised, still
Architecture    massively parallel,
                                      mostly serial
                redundant
Operating Freq. 50-100Hz              > Ghz
Power Consump. ~20W                   150-300W
                10e11 Neurons,
Complexity                            500M
                10e15 Synapses
Processing                            PS3 Cell – 10k
                ~ 100M MIPS
Power                                 MIPS
Feature Size    4-100um               ~45nm
Memory          100TB                 a lot as well ...
Neuromorphic Engineering
 Understanding the principles by which
           brains function


 Emulate those in hardware, for further
reasearch, and ultimately, to find useful
             applications


  Most Neuromorphic hardware is
            Analog!
Neural Circuits
Science today?
Who is making decisions?
                                                                     Decisions 'made' in
                                                                     the brain before you
                                                                     know it
                                                                     Subjects asked to
                                                                     press a button
                                                                     Scanner revealed
                                                                     response
                                                                     (Haynes 2008)
M a x P la n c k In s titu te fo r H u m a n C o g n itiv e a n d B r a in S c ie n c e s in L e ip z ig , C h a r ité
U n iv e r s ity H o s p ita l a n d th e B e r n s te in C e n te r fo r C o m p u ta tio n a l N e u r o s c ie n c e in B e r lin
Cool Stuff
More cool stuff
Some tough questions
What is intelligence?
Can we build intelligence?
When will computational power of
machines match that of a human?



When will computational power of
machines match that of humanity?
Can we build intelligence?
When will computational power of
machines match that of a human?
 > 2029 (Kurzweil, passing the turing test)
 = 1 HB (Human Brain)
When will computational power of
machines match that of humanity?
 > 2050 (Kurzweil, Kelly)
 = 6bn HB
What is free will?
 If our experience of reality is generated
by our brain, given the research I showed
                   you,


how do we explain that our impression of
choice seems to stem from an underlying
         mechanistic structure?
Can machines feel?
Conversely, if despite this mechanistic
 nature of our brain, we are indeed
              emotional,


 then can't sufficiently machines and
      robots be emotional too?
Final thought
 Who can think of a similar man-made
structure that has some resemblance to
                the brain?
Thoughtworks  Ignite    On  Brains And  Computing

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Thoughtworks Ignite On Brains And Computing

  • 1. On Brains and Computing Anthony Hsiao SapnaSolutions
  • 3. „ “ The Brain – My second most favourite organ! (Woody Allen, Director)
  • 4. Context Neuroscience is the scientific study of the nervous system Informatics is the science of information, the practice of information processing, and the engineering of information systems Neuroiformatics Neuromorphic Engineering
  • 5. The Brain in a Nutshell Complex network of Neurons Synapses Distributed Brain Sensors CNS Stomach
  • 6. Neurons – Computation Concentration gradient of Ions K+, Na+,Ca2+ Action Potential Electrical Performs 'Sum'
  • 7. Synapses - Memory? 'Gap' between two interconnecting Neurons Transmits AP Varying Efficacy Action Potential Chemical Performs 'Weighting'
  • 8. The Amazing Brain Simple repeated pattern: Concentration difference of Ions in a liquid Many Neurons > Many other Neurons Giving rise to: Emotions Thought Sensation Realities
  • 9. Quick Comparison: Brain and Computers Brain Computer Distributed, Centralised, still Architecture massively parallel, mostly serial redundant Operating Freq. 50-100Hz > Ghz Power Consump. ~20W 150-300W 10e11 Neurons, Complexity 500M 10e15 Synapses Processing PS3 Cell – 10k ~ 100M MIPS Power MIPS Feature Size 4-100um ~45nm Memory 100TB a lot as well ...
  • 10. Neuromorphic Engineering Understanding the principles by which brains function Emulate those in hardware, for further reasearch, and ultimately, to find useful applications Most Neuromorphic hardware is Analog!
  • 13. Who is making decisions? Decisions 'made' in the brain before you know it Subjects asked to press a button Scanner revealed response (Haynes 2008) M a x P la n c k In s titu te fo r H u m a n C o g n itiv e a n d B r a in S c ie n c e s in L e ip z ig , C h a r ité U n iv e r s ity H o s p ita l a n d th e B e r n s te in C e n te r fo r C o m p u ta tio n a l N e u r o s c ie n c e in B e r lin
  • 18. Can we build intelligence? When will computational power of machines match that of a human? When will computational power of machines match that of humanity?
  • 19. Can we build intelligence? When will computational power of machines match that of a human? > 2029 (Kurzweil, passing the turing test) = 1 HB (Human Brain) When will computational power of machines match that of humanity? > 2050 (Kurzweil, Kelly) = 6bn HB
  • 20. What is free will? If our experience of reality is generated by our brain, given the research I showed you, how do we explain that our impression of choice seems to stem from an underlying mechanistic structure?
  • 21. Can machines feel? Conversely, if despite this mechanistic nature of our brain, we are indeed emotional, then can't sufficiently machines and robots be emotional too?
  • 22. Final thought Who can think of a similar man-made structure that has some resemblance to the brain?