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

Work01:22

Work

Work is done when energy is transferred from one object to another. In other words, work is when a force acts on something that undergoes a displacement from one position to another. Forces can vary as a function of position, and displacements can be along various paths between two points. The increment of work (dW) done by a force acting through an infinitesimal displacement can be defined as the dot product of force () and displacement () vectors.
The dot product can be expressed in terms of...
Work01:14

Work

Work is a fundamental concept of mechanical engineering and has many applications. Understanding how work is calculated and the different types of work can help us better understand physical processes and provide insights into complex problems.
Work is defined as the result of a force acting on an object, causing it to move along the line of action of force. It is also defined as the process of transferring energy through the application of force on an object, resulting in its displacement.
Quantifying Work02:30

Quantifying Work

As a system undergoes a change, its internal energy can change, and energy can be transferred from the system to the surroundings, or from the surroundings to the system.
Virtual Work01:20

Virtual Work

The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
Methods of Documentation II: POMR01:26

Methods of Documentation II: POMR

The Problem-Oriented Medical Record (POMR) revolutionized medical record-keeping by introducing a systematic approach focusing on the patient's problems rather than merely listing symptoms. Dr. Lawrence Weed's introduction of this method in the 1960s marked a significant advancement in medical documentation. The POMR framework consists of four key components: the database, problem list, plan of care, and progress notes.
Work Done on a System by External Force01:11

Work Done on a System by External Force

The work done by an external force on a particle changes its kinetic energy. However, internal forces must also be considered for a system of interacting particles. The potential energy formulation helps formulate the effect of internal forces. The net work done by an external force can be written in terms of the total change of mechanical energy, which includes both kinetic and potential energies.
In the presence of a non-conservative opposing force, like friction, some part of the work done...

You might also read

Related Articles

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

Sort by
Same author

Synergistic cytotoxic activity on breast cancer cells by tetrahydroxyquinone and photothermal therapy.

Photochemistry and photobiology·2026
Same author

The role of tetrahydroxyquinone solubility on apoptosis induction in human colorectal cells.

Toxicology mechanisms and methods·2025
Same author

The Fluorescent Cell Line SW620-GFP Is a Valuable Model to Monitor Magnetic Hyperthermia.

Bioengineering (Basel, Switzerland)·2024
Same author

Dry but Not Humid Thermal Processing of <i>Aloe vera</i> Gel Promotes Cytotoxicity on Human Intestinal Cells HT-29.

Foods (Basel, Switzerland)·2022
Same author

A Ferrofluid with Surface Modified Nanoparticles for Magnetic Hyperthermia and High ROS Production.

Molecules (Basel, Switzerland)·2022
Same author

Green Metallic Nanoparticles for Cancer Therapy: Evaluation Models and Cancer Applications.

Pharmaceutics·2021

Related Experiment Video

Updated: Jul 17, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

Extended work periods.

Peter Knauth1

  • 1Institute of Industrial Production, Department of Ergonomics, University of Karlsruhe (TH), Karlsruhe, Germany.

Industrial Health
|February 8, 2007
PubMed
Summary

Extended working hours present both risks and benefits, impacting job safety, sleep, and performance. Careful consideration is advised, especially for public safety roles, due to mixed research findings.

Area of Science:

  • Occupational Health
  • Workforce Management
  • Human Factors Engineering

Background:

  • Extended daily working hours are increasingly common in various industries.
  • The impact of prolonged work schedules on employee well-being and safety requires thorough investigation.

Purpose of the Study:

  • To synthesize findings from existing literature on the effects of extended working hours.
  • To identify potential negative and positive consequences associated with longer work shifts.

Main Methods:

  • A comprehensive literature review was performed.
  • 105 studies examining the effects of extended daily working hours were analyzed.

Main Results:

  • Negative effects include increased accidents, reduced sleep quality, decreased alertness, fatigue, and adverse health impacts.

More Related Videos

"Avatar", a Modified Ex vivo Work Loop Experiments Using In vivo Strain and Activation
07:03

"Avatar", a Modified Ex vivo Work Loop Experiments Using In vivo Strain and Activation

Published on: August 18, 2023

Related Experiment Videos

Last Updated: Jul 17, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
08:36

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments

Published on: August 8, 2019

"Avatar", a Modified Ex vivo Work Loop Experiments Using In vivo Strain and Activation
07:03

"Avatar", a Modified Ex vivo Work Loop Experiments Using In vivo Strain and Activation

Published on: August 18, 2023

  • Positive effects may involve reduced travel, more personal time, and increased job satisfaction.
  • Research findings are often contradictory, with methodological limitations present in many studies.

    • Conclusions:

    • Firm conclusions are difficult due to conflicting results and study limitations.
    • Caution is recommended when implementing extended work shifts, particularly in safety-critical sectors.
    • A decision-making checklist for extended work shifts is provided, considering workload, breaks, staffing, and health/safety assessments.