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

Cavity Drainage and Flashings in Masonry walls01:20

Cavity Drainage and Flashings in Masonry walls

462
Typically, a cavity wall consists of two wythes separated by a gap of at least 2 inches, which may contain insulation while still maintaining a minimum clear space of 1 inch to facilitate adequate drainage. Advanced methods like the insertion of a continuous drainage mat can further reduce this space while ensuring effective moisture expulsion.
Weep holes, strategically placed at the base of the cavity, are critical for draining accumulated water. These openings are created by leaving head...
462
Specific Heat01:16

Specific Heat

67.5K
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
67.5K
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

2.4K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
2.4K
Pathophysiology of Cardiac Performance01:29

Pathophysiology of Cardiac Performance

1.6K
Typical heart performance is influenced by heart rate, rhythm, myocardial contraction, and metabolism or blood flow. The cardiac muscle exhibits distinct electrophysiological features, including pacemaker activity and calcium channel control, which play a vital role in the heart's response to various drugs. The autonomic nervous system, comprising the sympathetic and parasympathetic branches, regulates heart rate. Sympathetic activation increases heart rate, while parasympathetic activation...
1.6K
High-Performance Liquid Chromatography: Introduction01:11

High-Performance Liquid Chromatography: Introduction

3.5K
High-performance liquid chromatography(HPLC), formerly referred to as High-pressure liquid chromatography, is a powerful technique used to separate, identify, and quantify components in complex mixtures. The term "high pressure" refers to using high pressure to push the liquid mobile phase through the tightly packed columns.
In HPLC, two phases play a critical role in the separation process:
3.5K
High-Performance Liquid Chromatography: Instrumentation00:57

High-Performance Liquid Chromatography: Instrumentation

3.0K
High-performance liquid chromatography, or HPLC, is an analytical technique that separates liquid samples under high pressures. An HPLC instrument consists of glass bottles for storing solvents called mobile phase reservoirs. HPLC-grade solvents are used to maintain high purity, and the dissolved gases are removed using a degasser, such as a vacuum pumping system or sparging with helium. The solvents are then pumped into the analytical column using a screw-driven syringe or reciprocating pumps.
3.0K

You might also read

Related Articles

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

Sort by
Same author

Days to re-entrainment following the spring and autumn changes in local clock time: Beyond simple heuristics.

Frontiers in photonics·2026
Same author

Cause, effect, and remediation of melanin-associated bias in pulse oximetry.

Journal of biomedical optics·2026
Same author

The Impact of a Blue-Blocking Filter Over One Eye on Health and Performance Outcomes and Its Implications for Night Workers.

Biological research for nursing·2025
Same author

Melanin bias in pulse oximetry explained by light source spectral bandwidth.

British journal of anaesthesia·2024
Same author

Evaluation of a Novel Ambient Light Survey Question in the Cancer Prevention Study-3.

International journal of environmental research and public health·2023
Same author

The circadian stimulus-oscillator model: Improvements to Kronauer's model of the human circadian pacemaker.

Frontiers in neuroscience·2022
Same journal

A novel paradigm for identifying eye-tracking metrics associated with cognitive control during driving through MEG neuroimaging.

Transportation research. Part F, Traffic psychology and behaviour·2025
Same journal

Predicting Young Drivers' Time-to-Licensure from Sociodemographic Characteristics and Quality of Adult-Supervised Practice.

Transportation research. Part F, Traffic psychology and behaviour·2025
Same journal

Differential Impacts of Road Diets on Driving Behavior among Older Adults with and without Preclinical Alzheimer's Pathology.

Transportation research. Part F, Traffic psychology and behaviour·2025
Same journal

Examination of Naturalistic Driving Behavior and Risk Events Across Concussion Recovery.

Transportation research. Part F, Traffic psychology and behaviour·2025
Same journal

Corrigendum to "Driving fatigue increases after the spring transition to daylight saving time in young male drivers: A pilot study" [Transport. Res. Part F: Traffic Psychol. Behav. 99 (2023) 83-97].

Transportation research. Part F, Traffic psychology and behaviour·2024
Same journal

Principal Components Analysis of Driving Simulator Variables in Novice Drivers.

Transportation research. Part F, Traffic psychology and behaviour·2024
See all related articles

Related Experiment Video

Updated: Feb 2, 2026

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons
15:01

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons

Published on: August 6, 2012

14.1K

Toward Performance Specifications for Flashing Warning Beacons.

Mark S Rea1, John D Bullough1

  • 1Lighting Research Center, Rensselaer Polytechnic Institute, 21 Union Street, Troy, NY 12180 USA.

Transportation Research. Part F, Traffic Psychology and Behaviour
|November 13, 2018
PubMed
Summary
This summary is machine-generated.

Optimize flashing warning beacons for safety. Peak intensity should be at least 750 cd for daytime detection and 2000 cd for nighttime visibility. Use partial-off flash sequences and dual beacons to improve movement judgments for service workers.

Keywords:
closure detectiondisability glaregap closurelightingreaction time

More Related Videos

Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons
12:20

Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons

Published on: August 6, 2014

12.2K
Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons
11:35

Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons

Published on: October 29, 2011

13.3K

Related Experiment Videos

Last Updated: Feb 2, 2026

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons
15:01

Quantitative, Real-time Analysis of Base Excision Repair Activity in Cell Lysates Utilizing Lesion-specific Molecular Beacons

Published on: August 6, 2012

14.1K
Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons
12:20

Real-time Imaging of Single Engineered RNA Transcripts in Living Cells Using Ratiometric Bimolecular Beacons

Published on: August 6, 2014

12.2K
Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons
11:35

Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons

Published on: October 29, 2011

13.3K

Area of Science:

  • Human-Computer Interaction
  • Applied Optics
  • Psychophysics

Background:

  • Front line service workers in transportation, utility, and construction require effective warning beacons.
  • Beacons must be easily detected and provide accurate relative movement information for worker safety.

Purpose of the Study:

  • To establish empirical foundations for warning beacon performance in detection and relative movement judgments.
  • To inform optimal design specifications for warning beacon intensity and flash patterns.

Main Methods:

  • Two psychophysical experiments measured reaction times to beacon onset and observers' judgments of relative movement.
  • Experiment 1 varied beacon peak intensity under different scene conditions and assessed target visibility.
  • Experiment 2 evaluated different flash-sequence patterns and the number of beacons for gap closure judgments.

Main Results:

  • Asymptotic reaction times for beacon detection occurred at intensities >= 750 cd (daytime).
  • Nighttime visibility of low-contrast targets was maintained below 2000 cd peak intensity.
  • Gap closure judgments improved with flash sequences (minimum intensity >= 10% of peak) and dual synchronized beacons.

Conclusions:

  • Recommended minimum peak intensity for warning beacons is 750 cd, with a maximum of 2000 cd for detection.
  • Partial-off flash sequences and dual synchronized beacons enhance gap closure judgments for moving vehicles.
  • Implementing these specifications can improve safety for service workers.