GCRC 2015: Abstract Thoughts on Abstract Things

Opening keynote for Garden City Ruby Conf 2015.

Transcript

4. Abstract Thoughts on Abstract Things
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
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
25. Trichromacy
30. Patterns and Algorithms
41. ?
42. ?
45. Is magenta real?
46. # FF00FF
49. Data Abstraction
51. “Dataless Programming” RM Balzer - 1967
54. Space
58. Wait, what?
59. Are we still talking about abstraction?
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
71. You should be able to reason about modules in isolation
72. “Global Variables Considered Harmful” W.A. Wulf, M. Shaw, 1973
73. Tetrachromacy
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
86. Concetta Antico
91. Object Oriented Programming
93. #alankayholdingthings
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 for
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
117. Strong external abstractions allow weak internal abstractions
118. Distributed Applications
120. Is magenta a colour?
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
134. Himba Tribe (Namibia)
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
139. Abstractions and Security
140. Most attacks rely on switching up or down abstraction levels
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