Team Assembly

Team Assembly preview image

1 collaborator

Uri_dolphin3 Uri Wilensky (Author)

Tags

coolest models 

Tagged by Michelle Wilkerson-Jerde over 15 years ago

networks 

Tagged by Reuven M. Lerner over 11 years ago

social science 

Tagged by Reuven M. Lerner over 11 years ago

Parent of 1 model: Child of Team Assembly
Model group CCL | Visible to everyone | Changeable by group members (CCL)
Model was written in NetLogo 5.0.4 • Viewed 897 times • Downloaded 119 times • Run 3 times
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Click to Run Model

globals
[
  newcomer              ;; an agent who has never collaborated
  component-size        ;; current running size of component being explored
  giant-component-size  ;; size of largest connected component
  components            ;; list of connected components
]

turtles-own
[
  incumbent?   ;; true if an agent has collaborated before
  in-team?     ;; true if an agent belongs to the new team being constructed
  downtime     ;; the number of time steps passed since the agent last collaborated
  explored?    ;; used to compute connected components in the graph
]

links-own
[
  new-collaboration?  ;; true if the link represents the first time two agents collaborated
]


;;;;;;;;;;;;;;;;;;;;;;;;
;;; Setup Procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;;

to make-newcomer
  create-turtles 1
  [
    set color blue + 1
    set size 1.8
    set incumbent? false
    set in-team? false
    set newcomer self
    set downtime 0
    set explored? false
  ]
end 

to setup
  clear-all
  set-default-shape turtles "circle"

  ;; assemble the first team
  repeat team-size [ make-newcomer ]
  ask turtles
  [
    set in-team? true
    set incumbent? true
  ]
  tie-collaborators
  color-collaborations

  ask turtles  ;; arrange turtles in a regular polygon
  [
    set heading (360 / team-size) * who
    fd 1.75
    set in-team? false
  ]
  find-all-components
  reset-ticks
end 


;;;;;;;;;;;;;;;;;;;;;;;
;;; Main Procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;

to go
  ;; all existing turtles are now considered incumbents
  ask turtles [set incumbent? true set color gray - 1.5 set size 0.9]
  ask links [set new-collaboration? false]

  ;; assemble a new team
  pick-team-members
  tie-collaborators
  color-collaborations

  ;; age turtles
  ask turtles
  [
    ;; agents drop out of the collaboration network when they become inactive for max-downtime steps
    if downtime > max-downtime
      [die]

    set in-team? false
    set downtime downtime + 1
  ]

  if layout? [ layout ]
  find-all-components
  tick
end 


;; choose turtles to be in a new team

to pick-team-members
  let new-team-member nobody
  repeat team-size
  [
    ifelse random-float 100.0 >= p  ;;with a probability P, make a newcomer
    [
      make-newcomer
      set new-team-member newcomer
    ]
    [
      ;; with a probability Q, choose a new team member who was a previous collaborator of an existing team member
      ;; if the current team has at least one previous collaborator.
      ;; otherwise collaborate with a previous incumbent
      ifelse random-float 100.0 < q and any? (turtles with [in-team? and (any? link-neighbors with [not in-team?])])
        [set new-team-member one-of turtles with [not in-team? and (any? link-neighbors with [in-team?])]]
        [set new-team-member one-of turtles with [not in-team?]]
    ]
    ask new-team-member  ;; specify turtle to become a new team member
    [
      set in-team? true
      set downtime 0
      set size 1.8
      set color ifelse-value incumbent? [yellow + 2] [blue + 1]
    ]
  ]
end 


;; forms a link between all unconnected turtles with in-team? = true

to tie-collaborators
  ask turtles with [in-team?]
  [
    create-links-with other turtles with [in-team?]
    [
      set new-collaboration? true  ;; specifies newly-formed collaboration between two members
      set thickness 0.3
    ]
  ]
end 


;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Visualization Procedures ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; color links according to past experience

to color-collaborations
    ask links with [[in-team?] of end1 and [in-team?] of end2]
    [
      ifelse new-collaboration?
      [
        ifelse ([incumbent?] of end1) and ([incumbent?] of end2)
        [
          set color yellow       ;; both members are incumbents
        ]
        [
          ifelse ([incumbent?] of end1) or ([incumbent?] of end2)
            [ set color green ]  ;; one member is an incumbent
            [ set color blue ]   ;; both members are newcomers
        ]
      ]
      [
        set color red            ;; members are previous collaborators
      ]
    ]
end 

;; perform spring layout on all turtles and links

to layout
  repeat 12 [
    layout-spring turtles links 0.18 0.01 1.2
    display
  ]
end 


;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Network Exploration ;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;

;; to find all the connected components in the network, their sizes and starting turtles

to find-all-components
  set components []
  set giant-component-size 0

  ask turtles [ set explored? false ]
  ;; keep exploring till all turtles get explored
  loop
  [
    ;; pick a turtle that has not yet been explored
    let start one-of turtles with [ not explored? ]
    if start = nobody [ stop ]
    ;; reset the number of turtles found to 0
    ;; this variable is updated each time we explore an
    ;; unexplored turtle.
    set component-size 0
    ask start [ explore ]
    ;; the explore procedure updates the component-size variable.
    ;; so check, have we found a new giant component?
    if component-size > giant-component-size
    [
      set giant-component-size component-size
    ]
    set components lput component-size components
  ]
end 

;; finds all turtles reachable from this turtle

to explore ;; turtle procedure
  if explored? [ stop ]
  set explored? true
  set component-size component-size + 1
  ask link-neighbors [ explore ]
end 


; Copyright 2007 Uri Wilensky.
; See Info tab for full copyright and license.

There are 15 versions of this model.

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Uri Wilensky over 11 years ago Updated to NetLogo 5.0.4 Download this version
Uri Wilensky about 12 years ago Updated version tag Download this version
Uri Wilensky about 12 years ago Updated to version from NetLogo 5.0.3 distribution Download this version
Uri Wilensky almost 13 years ago Updated to NetLogo 5.0 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Updated from NetLogo 4.1 Download this version
Uri Wilensky over 14 years ago Model from NetLogo distribution Download this version
Uri Wilensky over 14 years ago Model from NetLogo distribution Download this version
Uri Wilensky over 14 years ago Team Assembly Download this version

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