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

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We found 40 items
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#1

Automation

by isee systems
Innovation often raises concerns about job losses, increasingly so in the past century with widespre ... Read more
Innovation often raises concerns about job losses, increasingly so in the past century with widespread automation and advanced artificial intelligence. Should we start to fear for our job security or will the creative potential in society maintain the labor force? Explore this model to see some of the interesting possibilities!
sim ⋮ 8,713 runs, 617 downloads
Download Model
Automation job loss AI artificial intelligence labor force
21610.926
#2

Feebate model

by Allyson Beall
This simulation offers users the opportunity to explore the impact of fees on conventional vehicle a ... Read more
This simulation offers users the opportunity to explore the impact of fees on conventional vehicle and rebates on lower to no emission vehicles.
sim ⋮ 8,592 runs
Environment Technology Science Economics Education
11346.577
#3

FermOpt: the fermentation optimisation game

by Conan Fee
A semi-batch fermenter simulation, in which players must explore the effects of various operating pa ... Read more
A semi-batch fermenter simulation, in which players must explore the effects of various operating parameters to try to maximise the production of an imaginary product, "WonderMab", for the lowest possible cost.
sim ⋮ 3,830 runs
Biology Science Education fermenter fermentor
9822.613
#4

Greenhouse Gas Emissions Management Tool

by SMI-JKMRC
sim ⋮ 2,341 runs
Environment Business Technology Science Economics
6402.75
#5

Systems In Focus: Conservation

by isee systems
Fishing areas are within the commons, which encourages greater investment in ships when there is dem ... Read more
Fishing areas are within the commons, which encourages greater investment in ships when there is demand. More importantly, we can never really know the population of the given fishery and therefore whether it is in danger of being fished out. This model explores the trade-offs between investing in more ships to catch more fish and the long-term viability of the fishery.
model ⋮ 3,298 downloads
Download Model
Environment Business Technology Ecology Systems in Focus
4596.436
#6

Systems In Focus: Energy

by isee systems
Building capacity in alternative energy sectors takes time and large investments. The transition to ... Read more
Building capacity in alternative energy sectors takes time and large investments. The transition to other sources has to be financially feasible, as well as timely to prevent further damage from pollution. How can the mix of electricity generation technology change, based on both cost and pollution? This Systems in Focus model analyses how capacity can be developed in different energy sectors over time.
model ⋮ 3,791 downloads
Download Model
Technology Science Systems in Focus Energy
4455.306
#7

Electric Vehicles in Norway (Model)

by UiB MINDS
© Daria Yermolova & Valentina Orliuk 2020 A model that examines the various factors affecting the el ... Read more
© Daria Yermolova & Valentina Orliuk 2020 A model that examines the various factors affecting the electric car market in Norway, originally built for the course GEO-SD304 at UiB.
model ⋮ 2,228 downloads
Download Model
Environment Business Technology transport electric
4123.964
#8

COVID-19: Role of hospitals, soc. dist., and vaccines

by Michael L Deaton
sim ⋮ 3,877 runs
Environment Biology Business Technology Science
2508.72
#9

2 - NES based on LWR and HWR in a once-through fuel cycle

by INPRO
Simplified model of a nuclear energy system (NES) based on the light- and heavy-water thermal reacto ... Read more
Simplified model of a nuclear energy system (NES) based on the light- and heavy-water thermal reactors (LWR and HWR) in a once-through fuel cycle.
sim ⋮ 3,476 runs
Technology Science Education Nuclear
2290.056
#10

Impacts of Bergen's Green Strategy Goal T9: Fossil Free Cars

by UiB MINDS
Will Noyes, Faith Kiprono & Min Xiang 2020 This project aims to help Bergen meet the T9 goal that ‘a ... Read more
Will Noyes, Faith Kiprono & Min Xiang 2020 This project aims to help Bergen meet the T9 goal that ‘all new passenger cars are fossil-free from 2025’. The project intends to identify the underlying causal relationships linking the different factors affecting a 100 % switch to fossil-free passenger vehicles.
model ⋮ 1,012 downloads
Download Model
Environment Technology electric cars green transition car market
2127.154
#11

Electric Vehicles in Norway (ILE)

by UiB MINDS
© Daria Yermolova & Valentina Orliuk 2020 An interface and story that examines the various factors a ... Read more
© Daria Yermolova & Valentina Orliuk 2020 An interface and story that examines the various factors affecting the electric car market in Norway, originally built for the course GEO-SD304 at UiB.
sim ⋮ 1,418 runs, 54 downloads
Download Model
Environment Business Technology UiB MINDS
1818.934
#12

Carbon Budget Simulator

by Peter Victor
This model determines the number of years in which the global carbon budget will be exhausted. You s ... Read more
This model determines the number of years in which the global carbon budget will be exhausted. You set the carbon budget as a multiple of current carbon dioxide emissions. You choose a rate of economic growth and a rate of reduction in emissions intensity (emissions/GDP). The model puases when the carbon budget is exhausted. The model can be used to determine the exhaustion of national and regional carbon budgets as well following the same steps.
sim ⋮ 1,396 runs
Environment Technology Science Economics
1695.125
#13

Energy Equilibrium Model

by Girts Bohvalovs
To compensate the variability and non-controllability of seasonally generated renewable energy (RES) ... Read more
To compensate the variability and non-controllability of seasonally generated renewable energy (RES) (daily fluctuations in solar radiation intensity, wind speed, etc.) development of sufficient energy storage infrastructure in the regions will play a major role in transforming RES supply potential into reality. However, local public authorities that are responsible for creating an enabling policy environment for RES infrastructure development in regions encounter numerous challenges and uncertainties in deploying sufficient energy accumulation that often remain unanswered due to a lack of knowledge and on-site capacity, which in turn significantly hinders the regional path to climate neutrality. This project aims to develop an Energy Equilibrium Platform – an interactive and easily applicable tool to support municipalities and energy suppliers in decision-making related to the development of efficient action plans to accelerate local RES utilization in the region. Energy Equilibrium Platform will help municipalities to:(1) Identify the most optimal RES storage development strategy and its impact on energy flexibility in the region; (2) Help to determine the key factors affecting energy equilibrium (balance between the produced and the consumed energy) in the region; (3)Help to develop policy mechanisms and action plans to enhance local RES in the region; (4)Help to anticipate risks and avoid making expensive mistakes (e.g. investing in inappropriate technological solutions).
sim ⋮ 697 runs
Technology Economics Education
1393.12
#14

Anooja EVS Assignment- species richness model

by Anooja A
Species richness on island measured considering extra external factors. Based on island biogeographi ... Read more
Species richness on island measured considering extra external factors. Based on island biogeographic theory and species richness curve.
model ⋮ 380 downloads
Download Model
Environment Biology Technology Science Ecology
1272.9467
#15

The Physiologically-based Nanocarrier Biopharmaceutics Model

by Matthias G. Wacker
The Physiologically-based Nanocarrier Biopharmaceutics (PBNB) model provides a simulation of the pro ... Read more
The Physiologically-based Nanocarrier Biopharmaceutics (PBNB) model provides a simulation of the processes involved in the pharmacokinetics of drug delivery systems such as liposomes, nanoparticles and micelles. It identifies the drug release and elimination of the carrier and the free drug alone and enables a prediction of important pharmacokinetic parameters such as the targeting capability and the mean residence time of the carrier in the blood plasma.
sim ⋮ 538 runs
Science Education nanomedicines liposomes PBPK
1259.9946
#16

tragedy of commons water crisis

by Eleanor+Hagan
Water scarcity is the lack of fresh water resources to meet water demand.
model ⋮ 818 downloads
Download Model
Environment Biology Business Technology Science
1236.744
#17

Viral Video - from Gallagher

by Creative Learning Exchange
This model was copied from Dain Gallagher: Model showing logistical (limits to growth) growth when ... Read more
This model was copied from Dain Gallagher: Model showing logistical (limits to growth) growth when videos go viral.
model ⋮ 1,431 downloads
Download Model
Biology Technology Education Mathematics
1226.656
#18

SMBD-2성급호텔

by Benjamin C.K. Chung
SMBD-World ShowerB
sim ⋮ 1,828 runs
Technology Science Education shower
1201.5907
#19

Fish Banks, Ltd.Game

by Saeed Langarudi
In the Fish Banks, Ltd. game (originally developed as a board game by Professor Dennis L. Meadows in ... Read more
In the Fish Banks, Ltd. game (originally developed as a board game by Professor Dennis L. Meadows in 1986), teams of players manage their own fishing companies. At the beginning of the game, each fishing company has equal financial resources and fishing fleet. Each company has the same operating costs and technology. At the beginning of every simulated year, the companies make decisions about building, buying, and/or selling ships, whether to fish or not, and how far to send their fleet for fishing. The game's objective is to maximize total assets at the end of the simulation. The game developed here is a modified version of the Meadows' game as explained in the game rules.
sim ⋮ 355 runs
Environment Economics Ecology Education Dennis Meadows
1118.8804
#20

ccf poverty popuplation and climate change

by ROHIT+SOLANKI
a cld covering various sectors and majorly interacting between social and ecological systems.
diagram ⋮ 708 downloads
Download Model
Environment Biology Business Technology Science
1058.714
#21

Positive Feedback

by Franco Posa
Basic positive feedback model
model ⋮ 701 downloads
Download Model
Environment Biology Business Technology Science
1030.189
#22

plugrisost

by elaheh roohbakhsh
RWH system
model ⋮ 576 downloads
Download Model
Environment Technology Economics Ecology Education
944.02
#23

Plastics Waste

by Md Istiaque Hasan
Plastic pollution has become one of the most vital issues for the environment. The usage of plastic ... Read more
Plastic pollution has become one of the most vital issues for the environment. The usage of plastic has been increased rapidly because it is inexpensive and durable, thus more plastics are being generated. As a result, the huge quantity of generated plastic ends up in the landfill as they are not biodegradable. Plastics and their byproducts are littering our cities, oceans, and waterways which causes harm to humans, animals as well as plants through toxic pollutants. A huge number of plastic wastes eventually ends up in the ocean, meaning that marine animals are also at risk. Plastic takes hundreds or even thousand years to break down, so the environmental damage is longlasting. Our main policy is to decrease the plastic pollution by increasing plastic recycle rate. Plastic recycling refers to the process of recovering waste plastic and reprocessing the materials into functional and useful products. This procedure is known as the plastic recycling process. At present around 50% plastics are thrown away only after single use. By implementing this policy, we can reuse the plastics and decrease the number of plastics that goes into the landfill. Reusing will also decrease the number of newly generated plastic. As a result of the policy, less plastics will go into the landfill, the amount of plastic sent to incineration will be reduced, more plastics will be recycled, and new plastic generation rate will be decreased. In this way plastic pollution will be decreased eventually and it will provide a positive impact on the environment.
model ⋮ 415 downloads
Download Model
Environment Technology Education
927.0917
#24

1 - Simple NES

by INPRO
Simple model of a nuclear energy system based on a thermal reactor in a once-through fuel cycle
sim ⋮ 1,579 runs
Technology Science Education Nuclear
874.98
#25

Electric vehicles sales in Norway

by Daria Yermolova
This model was copied from MINDSproject: Daria Yermolova and Valentina Orliuk examine the various e ... Read more
This model was copied from MINDSproject: Daria Yermolova and Valentina Orliuk examine the various effectors on the electric car market in Norway as part of a joint project for SD304 at UIB.
model ⋮ 545 downloads
Download Model
Environment Business Technology Science Economics
819.75
#26

SAVES US

by Giovanni Scire'
Attraverso questo progetto sarà possibile comprendere al meglio le politiche di prevenzione contro l ... Read more
Attraverso questo progetto sarà possibile comprendere al meglio le politiche di prevenzione contro la diffusione del virus COVID-19 e l'efficacia di una lampada LED UV per la riduzione dei contagi. Utilizzando il simulatore sarà possibile comprendere come un vettore di contagio possa diffondersi all'interno di una comunità e come sia possibile ridurre la sua diffusione. Il presente progetto di ricerca è stato realizzato grazie al contributo della Regione Toscana.
sim ⋮ 429 runs
Biology Technology Science photonics biophotonics
813.37134
#27

Räuber Beziehung

by gringe
harry is gringe und er liebt hermine doch! Harry Styles wurde am 1 februar 26!!!!! Ich liebe Pomme ... Read more
harry is gringe und er liebt hermine doch! Harry Styles wurde am 1 februar 26!!!!! Ich liebe Pommes mit Mayo und Gurken Nano wurde von aliens geschickt
model ⋮ 434 downloads
Download Model
Environment Biology Business Technology Science
809.19464
#28

trag of commons

by Eleanor+Hagan
diagram ⋮ 579 downloads
Download Model
Environment Biology Business Technology Science
808.19
#29

Tanzania Dairy Investment Model

by Charles Nicholson
This is a model that allows assessment of investments in Tanzania's dairy sector from 2024 to 2030
sim ⋮ 1,319 runs
Business Technology Economics
805.72266
#30

Negative Feedback

by Franco Posa
Basic negative feedback model
model ⋮ 545 downloads
Download Model
Environment Biology Business Technology Science
805.705
#31

The Bass Diffusion Model

by Akshit Shah
it is a model for the adoption of a new technology, Given P as the potential adopters of the new tec ... Read more
it is a model for the adoption of a new technology, Given P as the potential adopters of the new technology, and A as the actual adopters, the adoption of new technology takes place due to two process - 1) word of mouth and 2) advertising and any other external influence. the adoption rate AR from potential adopters is AR= WoM + AfA
model ⋮ 1,011 downloads
Download Model
Technology Diffusion Model
802.584
#32

6 - Nuclear Fuel Depletion and Burn-up

by INPRO
Nuclear fuel depletion and burnup simulator is the ease-to-use isotopic and burnup simulator which c ... Read more
Nuclear fuel depletion and burnup simulator is the ease-to-use isotopic and burnup simulator which can enable nuclear planning experts to assist nuclear energy system modelling and scenario analysis studies as part of material flow and economics analyses.
sim ⋮ 951 runs
Technology Science Education Nuclear
761.645
#33

Huerto de un metro cuadrado

by gaby+herrera
Se compone de plantas pequeñas, grandes y verticales. Es ideal para espacios pequeños. se divide en ... Read more
Se compone de plantas pequeñas, grandes y verticales. Es ideal para espacios pequeños. se divide en cuadrados pequeños; cada espacio tiene una legumbre, flor o hierba diferente. En la construcción de la estructura se utilizan tubos de pvc (en la maqueta se utilizaron pajillas). Las plantas más grandes van en la fila de atrás, las más chicas en las filas posteriores, más cercanas a la dirección donde les llegue la luz del sol. Las plantas verticales como los tomates se cuelgan de los tubos. Hay que sujetar el marco vertical con alambre para dar seguridad contra los vientos fuertes. 1. Este sistema permite cultivar en pequeños espacios. 2. El espacio permite alcanzar toda la huerta para sembrar, regar y cosechar, sin necesidad de caminar encima de él (para no compactar el suelo). 3. La rotación de los cultivos es automática. Un cultivo de estación larga como el tomate, puede ser plantado entre otros cultivos de cosecha rápida y serán cosechadas antes que la planta necesite espacio. 4. Ya que es posible alcanzar la huerta al nivel de la cintura, éste formato, facilita el cultivo para discapacitados físicos.
model ⋮ 386 downloads
Download Model
Environment Technology Science Ecology
758.60333
#34

SMBD-5성급호텔

by Benjamin C.K. Chung
SMBD 4-1
sim ⋮ 1,095 runs
Business Technology Science Education
741.4167
#35

Platform Startup Flight Simulator

by Edward Anderson
This flight simulator allows the user to make different investments in a startup platform's function ... Read more
This flight simulator allows the user to make different investments in a startup platform's functionality. The platform has two "sides," one is customers, the other, suppliers. The Platfrom can also monetize by setting a subscription fee on the customer or supplier sides or both.
sim ⋮ 656 runs
Business Technology Economics Platforms
646.66
#36

test

by Kenneth Keatts
Test
model ⋮ 443 downloads
Download Model
Environment Biology Business Technology Science
646.602
#37

5 - Reactor unit deployment cash flow simulator

by INPRO
sim ⋮ 1,108 runs
Technology Science Education Nuclear
643.22
#38

lunar resources

by Marc-Andre
model ⋮ 795 downloads
Download Model
Environment Business Technology Economics
637.45
#39

Energy-Demand

by CLAUDIO CANGELOSI
-
model ⋮ 1,175 downloads
Download Model
Technology Claudio Cangelosi
610.475
#40

BioDeal

by Girts Bohvalovs
sim ⋮ 397 runs
Environment Biology Business Technology Science
529.00336
X

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™.