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A Dynamic
Landscape Emerges from a Network

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E42 Classic : NK Boolean Simulation Software
Version 1.3 2008-10-27
(requires java plugin 1.4 or higher)
(This is a WebStart version) FILE TYPE: e42in

E42 Classic software generates only Random Graphs Networks. These (static) networks generate emergent (dynamic) Boolean Landscapes consisting of many basins of attration. E42 Classic has an extensive suite tools to analyze the dynamics of the Landscape that emerges from the network.

E42 is a simulation tool for creating Boolean Discrete Dynamic Systems in the form of Networks consisting of N nodes, each of which has K inputs. For fuller explanations and research results go here. E42 Version 1.2 and higher calculates derivatives of attractors (TAO Tool), sorts attractor patterns into categories based on derivatives, and produces dynamic form effects as a way of capturing Landscape dynamics. E42 version 1.2.9 was completed 2008-10-27. Minor changes since then have resulted in version 1.3. (stat/E42/index.html)

E42 Plus : NK Boolean Simulation Software with Network Builder enhancements
Version 1.83. May 18, 2011. (This is a Webstart version) FILE TYPE: .XML

E42 Plus can generate Boolean Networks in the form of Random Graphs, Ordered Networks, Networks with Preferential Ponnectivity, and combinations of ordered and perferential networks. Thus it operationalizes the distinctions made by Barabasi, Watts, and others (Small Worlds, Scale Free Networks, etc).

E42 Plus incorporates Network Builder directily into E42 to faciliatate the investigation of random graphs, small world, preferential attachment and other network generating rules. This allows E42 Classic's suite of tools for analyzing Landscape dynamics to brought to bear upon a large variety of network types. (stat/E42_Network-Builder/E42_Network-Builder.jar)

E42 Plus has a file type that is incompatible with E42 Classic.

Four Types Classic Apparent Motion (stat/dynamic_systems/Content/examples/Apparent_Motion?motion.html)

Apparent Motion in Random Dot Displays (stat/dynamic_systems/Apparent_Motion?randomDots.html)

Logistic Equation (Y = aX(1-X) & Chaos Applet
This is an applet that runs the logistic equation. No Instructions. Looks bleak when you open it but just choose a "fractal". If you're into the logistic map the options will give you stuff you want (the parabola, time series, sensitive dependence through comparing two initial values of X, Fiegenbaum Plot) for the purposes of demonstration and teaching. (stat/dynamic_systems/Content/chaos/index.html)

Hysteresis Applet
This is an applet that creates a bifurcated potential well. A red ball run down into the well. Controls let you demonstrate hysteresis. . No Instructions. Looks bleak when you open it but just choose a "Tool". If you're into hysteresis you'll probably figure out how to run the controls. Main thing to know: drag the purple square at the bottom right or left to move the ball up the sides of the well. Then play with all the controls. One of the controls is the ball's "stickiness" or friction which controls how fast it falls and therefore its momentum. stat/dynamic_systems/Content/hysteresis/hysteresis.html)

Conway's Game of Life
This Applet uses E42 as an interface. E42 is a more general system than Cellular Automata; therefore we can build CA in the E42 (with some limitations). This applet uses E42 to generate one example of Conway's famous cellular automaton, Life. It is a demonstration interface and does not allow you to change the rules of Life. You can however, either globally or cell by cell, adjust which cells are on and off. Because this is an New Media executable, you cannot program it they way you can program E42. But it is a fun example of the Game of Life. (stat/dynamic_systems/Content/examples/LIFE/html/index.html)

TAO Tool: The Flow Change across Time (requires java plugin 1.4 ) Version 2
TAO is a tool for examining change over time in a Boolean Dynamic System. It is epistemologically grounded in the idea that the fundamental process of knowing is detecting differences. For fuller explanations and research results go here. stat/testing...

Stat Sampler: Links to interactive, online tools for teaching and learning statistics

DISCLAIMERS: *** This is an active research area. ***Software is being updated on a daily basis so menu structure, features, etc. change constantly. ***We build with the latest Java version available, so the latest Java plugin is required. ***Interfaces are designed to answer specific research questions and so are not usually intuitive and simple. ***Documentation is nearly non-existent, and where there is documentation, it lags behind the constant software changes. ***We are very happy to communicate with you about these tools and provide you with information that allows you to use the software to demonstrate many dynamic system phenomena and to answer your own research questions.

CONTACT: To get information that allows you use this software more easily, contact Tom Malloy at malloy@psych.utah.edu