Peter Hovmand's Work
We found 144 items
Include in results:
#1
3335.708
Greenspace and Physical Activity
This is a small model used to introduce system dynamics and the concept of systems in the context of
... Read more
This is a small model used to introduce system dynamics and the concept of systems in the context of public health and community health improving planning
#2
1663.0067
Campus sexual assault
A very simple, one stock, simulation of campus sexist attitudes toward rape and initimate partner vi
... Read more
A very simple, one stock, simulation of campus sexist attitudes toward rape and initimate partner violence. The model was originally developed in 1998 and later translated into Stella. The model has a number of modeling errors, but at the time, proved useful for gaining insight into the dynamics of the system and developing an innovative prevention program.
#4
1389.001
Developmental transitions and cognitive vulnerability
This is a "proof of concept" model illustrating how system dynamics can be used to develop feedback
... Read more
This is a "proof of concept" model illustrating how system dynamics can be used to develop feedback theories of developmental theories. The model focuses on understanding the dynamics of individual cognitive vulnerability from 0 to 21 years of age through a series of school transitions moderated by family support.
sim
⋮ 1,000 runs,
10 downloads
Download Model
Download Model
Education
psychology
theory development
proof of concept model
#5
981.9
Fresh Produce Access Game
sim
⋮ 1,023 runs,
7 downloads
Download Model
Download Model
Health
food security
nutrition securing
program funding
#6
941.05334
MNH Strategic Model
Strategic model of country-level policies to reduce maternal and neonatal mortality.
sim
⋮ 946 runs
global health
maternal survival
neonatal survival
#7
667.05
Human Ecological Systems (HES)
The purpose of this model is to (1) demonstrate a way to represent human development that includes i
... Read more
The purpose of this model is to (1) demonstrate a way to represent human development that includes individual resources, social networks, and spatial relationships within a single model of a formal feedback theory of development, (2) provide an approach to theory development that begins with a simple model and gradually includes more complex facets of social reality (e.g., social networks, location), and (3) illustrate its application to formally testing and comparing a theory over a wider range of assumptions that can inform the design of data collection and analysis to more accurately reflect the dynamics of human development and outcomes. The approach has a wide range of possible applications in theory development and community intervention design, research, and evaluation. Examples include school-based and community based positive youth development interventions, drug use/addiction and treatment in rural settings, community responses to domestic violence, neighborhood effects and interventions, homelessness, supports for ex-offenders released from prison or jail, and health inequities.
Version 1.0 focuses on mainly working out a simple example of interactions between social networks and spatial relationships. The model (right) represents a formal theory of how people will move to be close to their nearest friend. Since friends are determined by a social network where people have different sets of friends, and people are in different locations, movement will depend on an interaction between each individual’s social network, the location of their friends, the distance to their friends, and identifying their nearest friend and comparing one’s present location to the location of one’s nearest friend. The model implements this with a random social network for 100 individuals randomly distributed in 100m by 100m coordinate space.
sim
⋮ 206 runs
human development
social theory
methodology
social networks
spatial relationships
#17
349.22
Human Resiliency
Simple proof-of-concept model of human resiliency.
sim
⋮ 1,392 runs
#43
208.52
#47
184.047
Fit statistics
The model illustrates how various statistics to measure and assess fit perform relative to source of
... Read more
The model illustrates how various statistics to measure and assess fit perform relative to source of measurement error.
#48
163.78
SCORE
The Systems Change for Racial Equity strategic model simulates the the impact cross sector innovatio
... Read more
The Systems Change for Racial Equity strategic model simulates the the impact cross sector innovations to eliminate racism as a cause of health disparities.
sim
⋮ 658 runs
#53
92.84
Structure-behavior relationship
#66
51.116665
Access to Fresh Produce
Access to fresh produce concept model for a neighborhood with three types of interventions that can
... Read more
Access to fresh produce concept model for a neighborhood with three types of interventions that can be varied by their effect size and duration.
sim
⋮ 60 runs
Education
Health
food systems
proof of concept
#73
15.542666
EMT
Prototype simulation model for emergency medicine training
sim
⋮ 52 runs
emergency medicine
training
#75
11.16
Blood Lead Levels in Cuyahoga County
This is a "proof of concept" system dynamics simulation of children < 6 testing positive for blood l
... Read more
This is a "proof of concept" system dynamics simulation of children < 6 testing positive for blood level levels > 5 mg/dL in Cuyahoga County. The model was developed in collaboration with UNDIVIDED CLEVELAND.
sim
⋮ 61 runs
#76
11.05
CHL Regional Food System Demo
Demonstration of a running simulation and interface for the CHL Food System study.
sim
⋮ 85 runs
#80
3.504
Participation in Social Movements
Simple model of participation in social movements created during the 2018 Changing Systems High Scho
... Read more
Simple model of participation in social movements created during the 2018 Changing Systems High School Fellows training at the Brown School's Social System Design Lab, Washington University in St. Louis. Sponsored by SkipNV.
sim
⋮ 26 runs
Education
#82
-2.61
SD-EPI
The purpose of this model is to provide a crosswalk between system dynamics model paremeters and epi
... Read more
The purpose of this model is to provide a crosswalk between system dynamics model paremeters and epidemiology
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.
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.
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.
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™.