About

Ps-i is an environment for running agent-based simulations. It is cross-platform, with binaries available for Win32.

Ps-i is hosted on SourceForge. Project summary and status.

Users of Ps-i

• Agent-Based Identity Repertoire/PS-I project at University of Pennsylvania
• Lustick Consulting

(Note: if you are using Ps-i and want to be included in this list please e-mail me about it)

Version 5.2.7 features

• Effect code allows advanced users to develop agent rules to "push" attributes onto other agents (such as attacks)
• New Command Window allows users to input TCL command directly into the PS-I interface
• New memoization techniques implemented to optimize model speeds
• Documentation for PS-I 5.2.7 vastly improved (see below)
• Ability to treat two separate repertoires as one, allowing for a new repertoire size of 112 identities
• New set of sample models to orient new users
• Improved logging capability for debugging and testing

Version 3.0.3 features

• Rules viewer
• Moderated jump bias evolution process
• Realtime syntax feedback
• More field editing capabilities
• More routines for manipulation of repertoires and sets
• Self test suite
• Default NONE agentclass that describes empty agents.
• More icons to represent agents in field viewer.

Version 2.4.0 featuers

• selection tool allows to select areas using geometrical figures and mathematical expressions
• effect tool allows to change attributes of agents in an area created by selection tool according to user-defined expressions
• improved interactivity
• support for tcl scripts embedded in model specification files
• hash functions that can be used to generate repeatable random sequences
• templatized creation of new model specification files (ABIR model, currently)
• dynamic addition of attributes

Version 2.2.0 features

• declarative language for model specification
• industry standard Tcl/Tk scripting
• with built-in routine optimization, speculative evaluation and xf86 JIT compiler users can create complex models without sacrificing perfomance
• user friendly interface
• save and restore program runs
• change model parameters on the fly
• data visualization: field display with multiple agent shapes and color, statistics window, agent viewer, routine browser and highlight agents tool

• Latest release: PS-I 5.4.0 for Win32
• PS-I 5.3.7 for Win32
• PS-I 5.3.4 for Win32
• PS-I 5.2.7 for Win32
• PS-I 5.2.7 Source
• PS-I 5.0 for Win32
• PS-I 4.0.5 for Win32
• Ps-i 4.0.0-pre4 for Win32.
• Ps-i 3.0.6 source
• Latest stable version: Ps-i 3.0.6 for Win32 (note: Ps-i 3.0 binary will no longer work with older processors - plain Pentiums, if your cpu is faster than 300mhz you are fine).
• Ps-i 2.4.1 source
• Ps-i 2.4.1 for Win32 (requires Pentium Pro or later).

Instructions on accessing ps-i cvs repository.

Screenshots

• Screenshot of PS-I 5.2.7
• Screenshot of Ps-i 2.2-pre5
• Screenshot of Ps-i 2.2-pre12
• Another screenshot of Ps-i 2.2-pre12 (with statistics window)

Documentation

• Ps-i version 5.x (HTML) - this is a document being maintained by Lustick Consulting
• Ps-i version 2.2 (HTML)
• Ps-i version 2.4 (HTML)
• Analysis of walk versus jump bias evolution: text PDF and calculator script for Ps-i. (Free reader is available from Adobe website.)
• Description of sample models distributed with Ps-i: text PDF. (Requires Adobe acrobat reader).
• Review of Ps-i by Steven Livingstone, University of Queensland, Australia.
• Ps-i 4.0.4 manual (PDF)