Featured Author

John Hayward

I am a Visiting Research Fellow in Mathematics at the University of South Wales. Before my retirement, I was a senior lecturer at the university, teaching specialist courses in system dynamics, mathematical modelling and agent-based methods. I was awarded a BSc in astrophysics, and a PhD in applied mathematics, from the University of London, and then spent my career as a lecturer in mathematics. My research is in mathematical sociology with applications to the spread of social phenomena, such as ... Read more

Welcome to the isee Exchange™!


The Exchange is a repository of content created by Stella® users around the world. Scroll down to see featured items, search for specific items in the field above, or check out some common topics:



Learn about Stella terminology:

Like what you see? Design your own simulation-based content with our free Stella Online™ software.

If you own our Stella® Architect software, you can download assemblies—self-contained models that can be used as parts of other models—right here on the Exchange. Go here to view our assembly directory, and here to learn how assemblies can speed up and improve your modeling process.

We found 9 items
Author Rank Title Type Views
Include in results:
#1

Wetland Forestland hydrology

by Sam Probert
Simulates multiple hydrological processes through a forestland and wetland on the Western Boreal Pla ... Read more
Simulates multiple hydrological processes through a forestland and wetland on the Western Boreal Plain, Canada
model ⋮ 1,780 downloads
Download Model
Precipitation Evaporation Infiltration Groundwater
1895.4333
#2

Garden hydrology-model

by Gaston+Small
This model simulates soil moisture, leachate, and evapotranspiration in an urban garden as a functio ... Read more
This model simulates soil moisture, leachate, and evapotranspiration in an urban garden as a function of rainfall and irrigation inputs, and soil organic matter. It was developed based on empirical data from a 5-year study at the University of St. Thomas in Saint Paul, Minnesota.
sim ⋮ 1,490 runs
Environment Science Ecology
832.5203
#3

Wetland Forestland hydrology model

by Colin Hansen
This model was copied from Sam Probert: Simulates multiple hydrological processes through a forestl ... Read more
This model was copied from Sam Probert: Simulates multiple hydrological processes through a forestland and wetland on the Western Boreal Plain, Canada
model ⋮ 61 downloads
Download Model
Precipitation Evaporation Infiltration Groundwater
89.30434
#4

Pond hydrology

by Lance
model ⋮ 26 downloads
Download Model
Environment Biology Science
22.826666
#5

Wetland-Forestland-hydrology

by JoseGAONA
model ⋮ 51 downloads
Download Model
Environment Ecology
22.51
#6

PHyLiSS

by OP mcKenna
Pothole Hydrology Linked System Simulator
sim ⋮ 128 runs
19.61
#7

bathtub model

by EricaMcMinn
first model in hydrology
model ⋮ 17 downloads
Download Model
Education
5.62
#8

Hydrology_Krubong

by Siti Nafizah Adanan
model ⋮ 11 downloads
Download Model
Environment
2.86
#9

Hydrology

by Nathan Surendran
diagram ⋮ 21 downloads
Download Model
Environment
0.26
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Uploading a Bundle from Zip

Instead of creating bundles, categories, and assemblies one by one, you can upload a single zip file that contains all of your bundle's content. To create your zipped bundle, make a folder with your bundle's name and add subfolders with your categories' names. The folder tree should have the same structure that you want the categories to have in your bundle. Place your assembly .stmx files in the appropriate category folders, then zip your bundle folder and upload it using the Upload Bundle from Zip link above.

Assemblies, Bundles, and Categories

Assemblies are self contained models that demonstrate common ways to connect together building blocks and that can be used as parts of other models. This is analogous to using prefabricated wall and roof pieces to construct a house.

Bundles are groups of assemblies with a common use or theme. For example, a Health Care bundle might contain a variety of assemblies that aid in creating health care models. When you download assemblies from the isee Exchange™, you download an entire bundle, rather than individual assemblies.

Categories are subgroups of assemblies within a bundle. For example, a Health Care bundle might contain a Funding category for assemblies related to the management of hospital funds. All assemblies must be assigned to a category—they cannot be assigned to the root of a bundle.

Assemblies, bundles, and categories can be created and uploaded to the isee Exchange™ via the options on the Manage My Assemblies page. To learn more, visit our help pages, or take our assemblies tutorial.

Sim App (Sim)

An interface that allows users to interact with a model.

Image of a sim

Sim apps allow users to interact with a model using buttons, sliders, knobs, tables, graphs, and storytelling. These interactions help users understand how parts of a system interact.

Interfaces are created by model authors in the Stella desktop software and can be uploaded to the isee Exchange™.

Model

A diagram that represents how elements in a system influence one another.

Image of a model

Models are mathematical representations of how elements in a system are connected and interact (e.g., ecosystems, organizations, supply chains). When running models on the isee Exchange™, results can be viewed in output devices like graphs and tables.

Models appear in the isee Exchange™ directory when authors upload them from the Stella® desktop software or create them with Stella Online™.

Causal Loop Diagram (CLD)

A map that represents the feedback structure of a system.

Image of a CLD

CLDs are high-level maps that represents the feedback structure of a system and easily communicate the essence of a model. They appear in the isee Exchange™ when authors upload them from the Stella desktop software or create them with Stella Online™.