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GCRC 2015: Abstract Thoughts on Abstract Things

GCRC 2015: Abstract Thoughts on Abstract Things

Opening keynote for Garden City Ruby Conf 2015.


Konstantin Haase

January 10, 2015

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  4. Abstract Thoughts on Abstract Things

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  10. “Anything that is in the world when you’re born is

    normal and ordinary and is just a natural part of the way the world works. ! Anything that's invented between when you’re fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it. ! Anything invented after you're thirty-five is against the natural order of things” –Douglas Adams
  11. Computer Science

  12. Colour Perception

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  14. Conclusion spoiler alert

  15. Abstraction happens in our minds

  16. Abstractions shape how we perceive things

  17. Changing abstractions is a basic principle of innovation and progress

  18. Abstraction is the basis of Computer Science

  19. Abstraction is the basis of Computer Science

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  25. Trichromacy

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  30. Patterns and Algorithms

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  41. ?

  42. ?

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  45. Is magenta real?

  46. # FF00FF

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  49. Data Abstraction

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  51. “Dataless Programming” RM Balzer - 1967

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  54. Space

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  58. Wait, what?

  59. Are we still talking about abstraction?

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  65. # FF00FF

  66. Control Abstraction

  67. Subroutines

  68. “Go To Statement considered harmfull” Edsger Dijkstra, 1968

  69. “Protection in Programming Languages" James H. Morris Jr., 1973

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  71. You should be able to reason about modules in isolation

  72. “Global Variables Considered Harmful” W.A. Wulf, M. Shaw, 1973

  73. Tetrachromacy

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  77. The dimensionality of color vision in carriers of anomalous trichromacy

    Institute of Neuroscience, Newcastle University, Newcastle upon Tyne, UK Gabriele Jordan Departments of Medicine and Genome Sciences, University of Washington, Seattle, USA Samir S. Deeb Department of Experimental Psychology, University of Cambridge, Cambridge, UK Jenny M. Bosten Department of Experimental Psychology, University of Cambridge, Cambridge, UK J. D. Mollon Some 12% of women are carriers of the mild, X-linked forms of color vision deficiencies called “anomalous trichromacy.” Owing to random X chromosome inactivation, their retinae must contain four classes of cone rather than the normal three; and it has previously been speculated that these female carriers might be tetrachromatic, capable of discriminating spectral stimuli that are indistinguishable to the normal trichromat. However, the existing evidence is sparse and inconclusive. Here, we address the question using (a) a forced-choice version of the Rayleigh test, (b) a test using multidimensional scaling to reveal directly the dimensionality of the participants’ color space, and (c) molecular genetic analyses to estimate the X-linked cone peak sensitivities of a selected sample of strong candidates for tetrachromacy. Our results suggest that most carriers of color anomaly do not exhibit four-dimensional color vision, and so we believe that anomalous trichromacy is unlikely to be maintained by an advantage to the carriers in discriminating colors. However, 1 of 24 obligate carriers of deuteranomaly exhibited tetrachromatic behavior on all our tests; this participant has three well-separated cone photopigments in the long- wave spectral region in addition to her short-wave cone. We assess the likelihood that behavioral tetrachromacy exists in the human population. Keywords: color vision, psychophysics, human, tetrachromacy, anomalous trichromacy Citation: Jordan, G., Deeb, S. S., Bosten, J. M., & Mollon, J. D. (2010). The dimensionality of color vision in carriers of anomalous trichromacy. Journal of Vision, 10(8):12, 1–19, http://www.journalofvision.org/content/10/8/12, doi:10.1167/10.8.12. Journal of Vision (2010) 10(8):12, 1–19 http://www.journalofvision.org/content/10/8/12 1
  78. 2-3% of all women? 12% of all women? 50% of

    all women?
  79. Gene on X chromosome OPN1MW and OPN1MW2

  80. Women could have up to six colour cones

  81. Mostly dysfunctional

  82. a few confirmed cases

  83. Seeing millions of more colours

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  86. Concetta Antico

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  91. Object Oriented Programming

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  93. #alankayholdingthings

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  100. –Alan Kay “OOP to me means only messaging, local retention

    and protection and hiding of state- process, and extreme late-binding of all things.”
  101. Data Abstraction + Control Abstraction = Object Oriented Programming

  102. Why dysfunctional? (my own unscientific theory)

  103. We don’t see colours with our eyes

  104. We see colours with our brain

  105. Our brain adjusts colours

  106. We don’t see colours we don’t have an abstract concept

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  108. When we learn to speak, colour perception switches from left

    brain side to right brain side
  109. We make the rules

  110. Some rules enable good programs (For some definition of good.)

  111. Single Responsibility Principle

  112. Liskov Substitution Principle

  113. Law of Demeter

  114. SOLID

  115. Don’t abstract too much, too early

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  117. Strong external abstractions allow weak internal abstractions

  118. Distributed Applications

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  120. Is magenta a colour?

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  122. Yes

  123. Inheritance

  124. Type Hierarchy Liskov Substitution Principle

  125. Implementation Sharing

  126. Mixins

  127. Composition

  128. Duck Typing

  129. Are we doing it right?

  130. Classes ≠ OOP

  131. Colour and Abstraction

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  134. Himba Tribe (Namibia)

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  136. zuzu: dark shades of blue, red, green and purple !

    vapa: white, some shades of yellow ! buru: some shades of green and blue ! dambu: some shades of green, red and brown
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  139. Abstractions and Security

  140. Most attacks rely on switching up or down abstraction levels

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  145. Abstraction

  146. Business Logic only exists in our minds

  147. Object Oriented Programming only exists in our minds

  148. Colours only exist in our minds

  149. UI elements only exist in our minds

  150. Countries only exist in our minds

  151. Conclusion

  152. Abstraction happens in our minds

  153. All abstraction

  154. Abstractions shape how we perceive things

  155. Changing abstractions is a basic principle of innovation and progress

  156. May the force be with you! @konstantinhaase me@rkh.im