Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Indeterminate Structure01:18

Indeterminate Structure

500
Indeterminate structures refer to structures where internal forces and reactions cannot be determined using only the equations of static equilibrium.  Indeterminate structures have more unknown forces and reaction forces than equations of static equilibrium that can be used to determine them. Indeterminate structures are often used in engineering to create complex, efficient, and aesthetically pleasing structures. There are various types of indeterminate structures used in engineering and...
500
Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

254
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by...
254
Internal Loadings in Structural Members: Problem Solving01:28

Internal Loadings in Structural Members: Problem Solving

1.2K
When designing or analyzing a structural member, it is important to consider the internal loadings developed within the member. These internal loadings include normal force, shear force, and bending moment. Engineers can ensure that the structural member can support the applied external forces by calculating these internal loadings.
To illustrate this, let's consider a beam OC of 5 kN, inclined at an angle of 53.13° with the horizontal and supported at both ends. Determine the internal...
1.2K
Dynamic Equilibrium02:20

Dynamic Equilibrium

50.3K
A reversible chemical reaction represents a chemical process that proceeds in both forward (left to right) and reverse (right to left) directions. When the rates of the forward and reverse reactions are equal, the concentrations of the reactant and product species remain constant over time and the system is at equilibrium. A special double arrow is used to emphasize the reversible nature of the reaction. The relative concentrations of reactants and products in equilibrium systems vary greatly;...
50.3K
Constraints and Statical Determinacy01:26

Constraints and Statical Determinacy

576
In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
576
Kinematic Equations: Problem Solving01:15

Kinematic Equations: Problem Solving

11.9K
When analyzing one-dimensional motion with constant acceleration, the problem-solving strategy involves identifying the known quantities and choosing the appropriate kinematic equations to solve for the unknowns. Either one or two kinematic equations are needed to solve for the unknowns, depending on the known and unknown quantities. Generally, the number of equations required is the same as the number of unknown quantities in the given example. Two-body pursuit problems always require two...
11.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Behavioral pharmacology study to inform the switching potential and abuse liability of tobacco-flavored and menthol-flavored pod-based electronic nicotine delivery systems with 5% nicotine concentration.

Experimental and clinical psychopharmacology·2026
Same author

US adults' complete switching away from cigarettes by menthol- and tobacco-flavored ENDS and by menthol cigarette preference: testing robustness to missing data.

Internal and emergency medicine·2026
Same author

Repeated point-prevalence of switching away from smoking after electronic nicotine delivery systems (ENDS) purchase.

Harm reduction journal·2025
Same author

Assessing the Italian version of the respiratory symptom experience scale (IT-RSES) in smokers and former smokers: a validation study.

BMC public health·2025
Same author

Evaluating the Effect of the JUUL2 System With 5 Flavors on Cigarette Smoking and Tobacco Product Use Behaviors Among Adults Who Smoke Cigarettes: 6-Week Actual Use Study.

Interactive journal of medical research·2025
Same author

Randomized experimental test of a reduced-exposure message for an e-cigarette: effects on risk perceptions.

Health education research·2025
Same journal

Bayesian evaluation for latent variable models: A tutorial on computing information criteria and bayes factors with the r package bleval.

Psychological methods·2026
Same journal

A stochastic block prior for clustering in graphical models.

Psychological methods·2026
Same journal

Three-level vector autoregressive models.

Psychological methods·2026
Same journal

Scaling cognitive modeling to big data: A deep learning approach to studying individual differences in evidence accumulation model parameters.

Psychological methods·2026
Same journal

Best practices in multilevel modeling for within-cluster group comparisons: An evaluation of coding strategies reflecting group composition and heterogeneity.

Psychological methods·2026
Same journal

A unified framework for psychometrics in experimental psychology: The standardized generalized hierarchical factor model.

Psychological methods·2026
See all related articles

Related Experiment Video

Updated: Jun 3, 2025

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

8.7K

Dynamic structural equation modeling with floor effects.

Bengt Muthén1, Tihomir Asparouhov1, Saul Shiffman2

  • 1Mplus.

Psychological Methods
|January 6, 2025
PubMed
Summary
This summary is machine-generated.

This study addresses floor effects in psychological data analysis. Two-part modeling offers a solution to avoid misleading results from standard methods, providing a more accurate analysis of outcomes with many lowest values.

More Related Videos

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
09:32

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

9.6K
Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
04:35

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

3.3K

Related Experiment Videos

Last Updated: Jun 3, 2025

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

8.7K
Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
09:32

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

9.6K
Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach
04:35

Development of an Individual-Tree Basal Area Increment Model using a Linear Mixed-Effects Approach

Published on: July 3, 2020

3.3K

Area of Science:

  • Psychology
  • Statistics
  • Health Sciences

Background:

  • Intensive longitudinal data analysis in psychology frequently encounters outcomes with strong floor effects.
  • Ignoring floor effects in standard analyses can lead to misleading results due to violated modeling assumptions.

Purpose of the Study:

  • To introduce two-part modeling as a method to address floor effects in intensive longitudinal data.
  • To demonstrate how two-part modeling can provide more accurate and detailed insights compared to traditional methods.

Main Methods:

  • The study proposes and illustrates two-part modeling for handling outcomes with significant floor effects.
  • Analysis techniques are demonstrated using a smoking cessation example.

Main Results:

  • Two-part modeling can circumvent biasing effects caused by ignoring floor effects.
  • This approach allows for differentiated examination of covariate effects on being at the floor versus above the floor.

Conclusions:

  • Two-part modeling is a valuable technique for analyzing intensive longitudinal data with floor effects.
  • It enhances the precision of statistical inference and the interpretability of covariate relationships in such data.