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

Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

472
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
472
Lagging Strand Synthesis01:59

Lagging Strand Synthesis

38.1K
During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
There are several major differences between synthesis of the leading strand and synthesis of the lagging strand. 1) Leading strand synthesis happens in the direction of replication fork opening, whereas lagging strand synthesis happens in the...
38.1K
Lagging Strand Synthesis01:59

Lagging Strand Synthesis

15.1K
15.1K
Generation Time01:22

Generation Time

2.0K
Bacterial generation time, the period required for a bacterial population to double during its exponential growth phase, serves as a critical measure of microbial growth dynamics under optimal conditions. This parameter varies significantly across bacterial species and can be influenced by factors such as temperature, pH, and the availability of nutrients. For example, Escherichia coli can achieve a generation time of approximately 20 minutes, while Mycobacterium tuberculosis exhibits a much...
2.0K
Instantaneous Velocity - II01:10

Instantaneous Velocity - II

12.4K
Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...
12.4K
Speed of a Transverse Wave01:13

Speed of a Transverse Wave

2.9K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
2.9K

You might also read

Related Articles

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

Sort by
Same author

Depression and violence—what do we really know?

The lancet. Psychiatry·2015
Same author

Assessing alcohol problems: need for a thorough medication history.

BMJ (Clinical research ed.)·2015
Same author

Including partners in trials of financial incentives for smoking cessation in pregnancy.

BMJ (Clinical research ed.)·2015
Same author

Interaction between antidepressants and alcohol: signal amplification by multiple case reports.

The International journal of risk & safety in medicine·2014
Same author

Independent drug information in Burkina Faso is key to improving public health.

Lancet (London, England)·2014
Same author

Department of Health's misguided alert recommending neuraminidase inhibitors for flu.

BMJ (Clinical research ed.)·2014
Same journal

Rheumatoid arthritis: previously untreated early disease.

BMJ clinical evidence·2016
Same journal

Diabetic retinopathy: intravitreal vascular endothelial growth factor inhibitors for diabetic macular oedema.

BMJ clinical evidence·2016
Same journal

Subarachnoid haemorrhage (spontaneous aneurysmal).

BMJ clinical evidence·2016
Same journal

Malaria: fluid therapy in severe disease.

BMJ clinical evidence·2016
Same journal

Age-related macular degeneration: anti-vascular endothelial growth factor treatment.

BMJ clinical evidence·2016
Same journal

MRSA: treating people with infection.

BMJ clinical evidence·2016
See all related articles

Related Experiment Video

Updated: Apr 30, 2026

ScanLag: High-throughput Quantification of Colony Growth and Lag Time
07:47

ScanLag: High-throughput Quantification of Colony Growth and Lag Time

Published on: July 15, 2014

17.1K

Jet lag.

Andrew Herxheimer1

  • 1UK Cochrane Centre, Oxford, UK.

BMJ Clinical Evidence
|May 1, 2014
PubMed
Summary
This summary is machine-generated.

Jet lag, a common issue for travelers crossing multiple time zones, can be managed with various interventions. This review examines the effectiveness and safety of options like hypnotics, lifestyle changes, and melatonin for minimizing jet lag symptoms.

More Related Videos

Flexible Measurement of Bioluminescent Reporters Using an Automated Longitudinal Luciferase Imaging Gas- and Temperature-optimized Recorder ALLIGATOR
10:33

Flexible Measurement of Bioluminescent Reporters Using an Automated Longitudinal Luciferase Imaging Gas- and Temperature-optimized Recorder ALLIGATOR

Published on: December 13, 2017

9.2K
Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis
06:44

Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis

Published on: September 23, 2025

709

Related Experiment Videos

Last Updated: Apr 30, 2026

ScanLag: High-throughput Quantification of Colony Growth and Lag Time
07:47

ScanLag: High-throughput Quantification of Colony Growth and Lag Time

Published on: July 15, 2014

17.1K
Flexible Measurement of Bioluminescent Reporters Using an Automated Longitudinal Luciferase Imaging Gas- and Temperature-optimized Recorder ALLIGATOR
10:33

Flexible Measurement of Bioluminescent Reporters Using an Automated Longitudinal Luciferase Imaging Gas- and Temperature-optimized Recorder ALLIGATOR

Published on: December 13, 2017

9.2K
Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis
06:44

Age-dependent Dynamics of Locomotion in Caenorhabditis elegans: A Lyapunov Exponent Analysis

Published on: September 23, 2025

709

Area of Science:

  • Chronobiology
  • Travel Medicine
  • Sleep Science

Background:

  • Jet lag is a transient disorder resulting from circadian rhythm desynchronization due to rapid travel across time zones.
  • It commonly affects air travelers, particularly those crossing five or more time zones, with eastward travel often exacerbating symptoms.
  • Disruption of the internal 'body clock' underlies the syndrome's physiological and psychological effects.

Purpose of the Study:

  • To systematically review and evaluate the efficacy and safety of interventions designed to prevent or minimize jet lag.
  • To provide evidence-based guidance on managing jet lag for air travelers.
  • To assess interventions including pharmacological (hypnotics, melatonin) and non-pharmacological (lifestyle, environmental) approaches.

Main Methods:

  • A systematic literature review was conducted, searching major databases (Medline, Embase, Cochrane Library) up to January 2014.
  • Studies meeting predefined inclusion criteria were identified and evaluated.
  • The GRADE (Grading of Recommendations Assessment, Development and Evaluation) system was used to assess the quality of evidence for each intervention.

Main Results:

  • Five studies met the inclusion criteria for the systematic review.
  • The review analyzed the effectiveness and safety profiles of hypnotics, lifestyle and environmental adaptations, and melatonin.
  • GRADE evaluations were performed to determine the strength of evidence supporting these interventions.

Conclusions:

  • The systematic review provides a comprehensive overview of interventions for jet lag.
  • Information on the effectiveness and safety of hypnotics, lifestyle/environmental adaptations, and melatonin is presented.
  • This evidence-based summary aids in understanding and managing jet lag in clinical practice and for travelers.