Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Air: Fate, Exposure, and Risk Analysis (FERA)

MIMS for TRIM

The Multimedia Integrated Modeling System (MIMS framework was designed and developed by the U.S. EPA Office of Research and Development. MIMS supports complex computational studies that use multiple interrelated models / programs, such as the modules within TRIM. MIMS is used by TRIM to run various models in sequence, while sharing input and output files.

The integration of the TRIM models and other programs is accomplished using a MIMS Project. A MIMS project serves as a container for all of the building blocks used in a study, such as the software programs (modules) to be run and scenarios that specify how the models communicate with one another. The MIMS approach differs from that of the model-centric frameworks because the MIMS modules do not conceptually communicate directly with one another like traditional models, but only through shared interfaces called domain objects, or via shared databases or files. Below are definitions of some important concepts used by MIMS.

  • The Project is the outermost container in MIMS. The project contains various categories of building blocks that will be used in a study, such as modules, domain objects, and scenarios.
  • A Scenario connects the MIMS building blocks (domain objects, processes, modules, and parameters) into a particular configuration to perform one or more model runs.
  • A Module is a software program (and supporting information) to be executed by the MIMS framework. Modules are typically simulation models (e.g., TRIM.Expo-Inhalation (APEX), TRIM.Risk-Eco).When a module is used to implement a process within a scenario and domain object, a copy of it is made that is known as a Module Instance.
  • A Parameter is a piece of information (e.g. a file name, true/false value, a grid) that is used by a MIMS building block. Parameters are used by Scenarios, Modules, Domain Objects, etc.
  • A Domain Object represents a concept, thing, or part of the environment to be modeled (e.g.., atmosphere, population, stream). The domain object contains both the information describing itself (in the form of parameters), and its behaviors (in the form of processes and the modules that implement them).
  • A Framework Object is an operational component such as an Iterator within the MIMS Scenario. The tasks of framework objects are typically independent of the environmental models and instead represent computational functions, such as when an iterator advances time steps or loops over the items in a set of input parameters.

Instructions for using MIMS for TRIM will be provided in Volume 1 of the TRIM.Risk User’s Guide. Additional information about MIMS concepts and how to navigate a MIMS project is available in Chapters 1 and 2 of the "MIMS for Models-3 Applications Tutorial."

Air: Fate, Exposure, and Risk Analysis (FERA)

  • Total Risk Integrated Methodology (TRIM)
    • TRIM.FaTE
    • TRIM.Expo
    • TRIM.Risk
    • Peer Review and Publications
  • Multimedia Fate and Transport Modeling
    • TRIM.FaTE
    • Other Models and Related Information
  • Human Exposure Assessment and Modeling
    • Criteria Air Pollutant Exposure Assessment
    • Databases to Support Exposure Modeling
    • Air Pollutants Exposure Model (APEX/ TRIM.Expo Inhalation)
    • Hazardous Air Pollutant Exposure Model (HAPEM)
    • Other Models and Exposure-Related Information
  • Risk Assessment and Modeling
    • Air Toxics Risk Assessment
    • Criteria Air Pollutant Risk Assessment
    • Human Exposure Model (HEM)
    • EPA Risk Assessment Policy, Guidelines, and Related Materials
Contact Us about FERA
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on December 16, 2024
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.