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A free and open source agent-based modeling toolkit that offers users a rich variety of features Repast (Recursive Porous Agent Simulation Toolkit) Simphony is an open source, cross-platform and free agent-based modeling toolkit that simplifies model creation and use. Here are some key features of "Repast Simphony": · Fluid model component development using any mixture of Java, Groovy, and flowcharts in each project; · A pure Java point-and-click model execution environment that includes built-in results logging and graphing tools as well as automated connections to a variety of optional external tools including the R statistics environment, ORA and Pajek network analysis plugins, A live agent SQL query tool plugin, the VisAD scientific visualization package, the Weka data mining platform, many popular spreadsheets, the MATLAB computational mathematics environment, and the iReport visual report designer; · An extremely flexible hierarchically nested definition of space including the ability to do point-and-click and modeling and visualization of 2D environments; 3D environments; networks including full integration with the JUNG network modeling library as well as Microsoft Excel spreadsheets and UCINET DL file importing; and geographical spaces including 2D and 3D Geographical Information Systems (GIS) support; · A range of data storage "freeze dryers" for model check pointing and restoration including XML file storage, text file storage, and database storage; · A fully concurrent multithreaded discrete event scheduler; · Libraries for genetic algorithms, neural networks, regression, random number generation, and specialized mathematics; · An automated Monte Carlo simulation framework which supports multiple modes of model results optimization; · Built-in tools for integrating external models; · Distributed computing with Terracotta; · Full object-orientation; · Optional end-to-end XML simulation · A point-and-click model deployment system; and · Availability on virtually all modern personal computing platforms including Mac OS X, Windows, and Linux. What's New in This Release: Simulation engine enhancements: · Dramatic performance enhancements for both GUI and non-GUI models · SQL queries of contexts and networks available in RepastEssentials · Schedule annotation processing updates Runtime interface enhancements: New plugins: · A new *ORA (http://www.casos.cs.cmu.edu/projects/ora/) network analysis plugin · A new Pajek (http://vlado.fmf.uni-lj.si/pub/networks/pajek/) network analysis plugin · A new live agent SQL query tool () plugin · New and improved docking framework · Substantially enhanced JUNG network statistics plugin Charts: · Many additional chart customization options · Chart performance enhancements Displays: · Network source and target edge end styling · Display background customization · New 2D displays hover probe · New point, polygon, and edge styling in 3D GIS displays · New control to adjust simulation execution speed · New GUI option for custom XML freeze drying Visual agent editor enhancements: · New code wizard · Copy and paste flowchart blocks within and between visual agents · Automatic HTML documentation generation from flowcharts New point-and-click templates for: · Regression · Neural networks · Genetic algorithms · Systems dynamics · SQL queries of contexts and networks · Templates for array properties · Flowchart image exporting to PNG, JPEG, BMP, and ICO formats · A snap blocks to grid option · Smooth group block moves · A new point-and-click tree editor for batch run files · A new point-and-click tree editor for legacy file integration descriptions Two new demos: · Cubic autocatlysis (Chemistry) · Cellular automata (Computer Science/Math)

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