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Related Concept Videos

Hazard Rate01:11

Hazard Rate

The hazard rate, also known as the hazard function or failure rate, is a statistical measure used to describe the instantaneous rate at which an event occurs, given that the event has not yet happened. From a probabilistic perspective, it represents the likelihood that a subject will experience the event in a very small time interval, conditional on surviving up to the beginning of that interval. In terms of frequency, the hazard rate can be viewed as the ratio of the number of events to the...
Mechanistic Models: Compartment Models in Individual and Population Analysis01:23

Mechanistic Models: Compartment Models in Individual and Population Analysis

Mechanistic models are utilized in individual analysis using single-source data, but imperfections arise due to data collection errors, preventing perfect prediction of observed data. The mathematical equation involves known values (Xi), observed concentrations (Ci), measurement errors (εi), model parameters (ϕj), and the related function (ƒi) for i number of values. Different least-squares metrics quantify differences between predicted and observed values. The ordinary least squares (OLS)...
Hazard Analysis and Critical Control Points (HACCP)01:30

Hazard Analysis and Critical Control Points (HACCP)

Hazard Analysis and Critical Control Points (HACCP) is a science-based, preventive system used globally to ensure food safety by identifying, evaluating, and controlling biological, chemical, and physical hazards throughout food production. Originally developed by NASA and the Pillsbury Company for astronaut food, HACCP is now a core component of the Codex Alimentarius.HACCP operates on prerequisite programs—such as Good Manufacturing Practices (GMPs), sanitation procedures, and supplier...
Hazard Ratio01:12

Hazard Ratio

The hazard ratio (HR) is a widely used measure in clinical trials to compare the risk of events, such as death or disease recurrence, between two groups over time. It reflects the ratio of hazard rates—the instantaneous risk of the event occurring—between a treatment group and a control group. This measure provides valuable insights into the relative effectiveness of a treatment by assessing how the risk of an event differs between the two groups.
For example, in a clinical trial evaluating a...
Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving01:29

Mechanistic Models: Compartment Models in Algorithms for Numerical Problem Solving

Mechanistic models play a crucial role in algorithms for numerical problem-solving, particularly in nonlinear mixed effects modeling (NMEM). These models aim to minimize specific objective functions by evaluating various parameter estimates, leading to the development of systematic algorithms. In some cases, linearization techniques approximate the model using linear equations.
In individual population analyses, different algorithms are employed, such as Cauchy's method, which uses a...
Steps in Outbreak Investigation01:18

Steps in Outbreak Investigation

In the ever-evolving field of public health, statistical analysis serves as a cornerstone for understanding and managing disease outbreaks. By leveraging various statistical tools, health professionals can predict potential outbreaks, analyze ongoing situations, and devise effective responses to mitigate impact. For that to happen, there are a few possible stages of the analysis:

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Updated: Jun 8, 2026

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
10:52

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Published on: April 13, 2016

Agent-based simulation for human-induced hazard analysis.

William M Bulleit1, Matthew W Drewek

  • 1Department of Civil and Environmental Engineering, Michigan Tech, Houghton, MI 49931-1295, USA. wmbullei@mtu.edu

Risk Analysis : an Official Publication of the Society for Risk Analysis
|October 1, 2010
PubMed
Summary

This study introduces agent-based modeling (ABM) to predict the frequency and magnitude of terrorist attacks. The findings suggest ABM is a viable method for engineering design against human-induced hazards.

Related Experiment Videos

Last Updated: Jun 8, 2026

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
10:52

Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior

Published on: April 13, 2016

Area of Science:

  • Engineering
  • Risk Analysis
  • Computational Social Science

Background:

  • Terrorism poses a significant hazard requiring probabilistic predictions for design purposes.
  • Analyzing human-induced hazards analogous to natural hazards necessitates predictive modeling.
  • Existing design methodologies often lack robust frameworks for incorporating terrorism as a hazard.

Purpose of the Study:

  • To develop and validate a prototype model for analyzing terrorist attacks using agent-based modeling (ABM).
  • To explore the viability of ABM for engineering design against human-induced hazards.
  • To provide probabilistic predictions for the frequency and magnitude of terrorist events.

Main Methods:

  • Agent-based modeling (ABM) was employed to simulate terrorist attack scenarios.
  • The model analyzed attack patterns, focusing on frequency, magnitude, and geographical distribution.
  • Preliminary validation involved assessing attack magnitude distributions and location preferences.

Main Results:

  • Terrorist attack magnitudes were found to follow a power-law distribution.
  • Attacks predominantly occurred in high-wealth transit routes and markets.
  • The ABM approach demonstrated preliminary validation for modeling human-induced hazards.

Conclusions:

  • Agent-based modeling (ABM) is a viable approach for modeling socioeconomic-based infrastructure systems.
  • The developed model provides a foundation for engineering design to mitigate human-induced hazards like terrorism.
  • Probabilistic predictions derived from ABM can inform more resilient system designs.