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

Household Wiring And Electrical Safety01:13

Household Wiring And Electrical Safety

Companies that supply power to most modern households use three conductors, typically called a three-wire line. While one is neutral, the other two are both at 120 V but with opposite polarity, giving a voltage of 240 V between them. With a three-wire line, high-power appliances that require 240 V, such as electric stoves and clothes dryers, are linked between the two hot lines. 120 V appliances can be connected between the neutral and either of the hot lines. The neutral side, which is always...
Operational Amplifiers01:17

Operational Amplifiers

The operational amplifier, often referred to as an op-amp, is a multifaceted building block of a circuit. This electronic component functions like a voltage-controlled voltage source and can also be used to create a voltage- or current-controlled current source. The design of an operational amplifier enables it to execute mathematical operations when external components like resistors and capacitors are linked to its terminals. An op-amp has the capacity to sum signals, amplify a signal,...
Circuit Breaker and Fuse Selection01:23

Circuit Breaker and Fuse Selection

A circuit breaker is a device engineered to interrupt fault currents and sometimes reclose automatically. When a fault current is detected, the breaker separates the electrical contacts, which generates an arc. This arc is extinguished by methods such as elongation, cooling, or splitting, depending on the breaker's design. Breakers are categorized based on the voltage they operate at and the medium used for arc extinction, such as air, oil, SF6 gas, or vacuum.
In high-voltage systems, circuit...
Overcurrent Relays01:26

Overcurrent Relays

Overcurrent relays, crucial for circuit protection, are connected to the secondary current of a current transformer. There are two primary types of overcurrent relays: instantaneous and time-delay.
Instantaneous overcurrent relays activate immediately when the input current exceeds a predetermined value, known as the pickup current, instantly energizing the circuit breaker trip coil. This rapid response is vital for addressing severe faults quickly.
Time-delay overcurrent relays, on the other...
Reclosers and Fuses01:26

Reclosers and Fuses

Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
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...

You might also read

Related Articles

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

Sort by
Same author

siRNA associated with immunonanoparticles directed against cd99 antigen improves gene expression inhibition in vivo in Ewing's sarcoma.

Journal of molecular recognition : JMR·2013
Same author

Pharmacokinetics and tolerability of intranasal diazepam and midazolam in healthy adult volunteers.

Acta neurologica Scandinavica·2009
Same author

Satisfaction of individuals treated long-term with continuous infusion of intrathecal baclofen by implanted programmable pump.

Pediatric rehabilitation·2006
Same author

Muscle fiber orientation in muscles commonly injected with botulinum toxin: an anatomical pilot study.

Neurotoxicity research·2006
Same author

Therapeutic potentialities of EWS-Fli-1 mRNA-targeted vectorized antisense oligonucleotides.

Annals of the New York Academy of Sciences·2004
Same author

Covalent coupling of a PIM-1 oncogene targeted PNA with an antennapedia derived peptide.

Nucleosides, nucleotides & nucleic acids·2003

Related Experiment Video

Updated: Jul 23, 2026

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms
10:32

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms

Published on: August 15, 2016

Automatic garage door openers: hazard for children

R L Kriel1, M E Gormley, L E Krach

  • 1Department of Pediatrics, Hennepin County Medical Center, Minneapolis, MN 55415, USA.

Pediatrics
|October 1, 1996
PubMed
Summary

Automatic garage door openers pose a significant risk to children, with many failing to reverse and causing severe injuries or fatalities. Homeowners can now test their openers using a simple paper towel method to ensure child safety.

More Related Videos

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy
11:53

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
04:55

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

Related Experiment Videos

Last Updated: Jul 23, 2026

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms
10:32

Robotic Mirror Therapy System for Functional Recovery of Hemiplegic Arms

Published on: August 15, 2016

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy
11:53

The Modular Design and Production of an Intelligent Robot Based on a Closed-Loop Control Strategy

Published on: October 14, 2017

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children
04:55

Handheld Metal Detector Screening for Metallic Foreign Body Ingestion in Children

Published on: September 11, 2018

Area of Science:

  • Pediatric Safety
  • Consumer Product Safety
  • Mechanical Engineering

Background:

  • Automatic garage door openers (AGDOs) have advanced but continue to cause severe injuries and deaths in children.
  • Understanding the frequency and circumstances of these accidents is crucial for prevention.

Observation:

  • Since 1974, at least 85 children have suffered severe injury or death from AGDO accidents in the U.S.
  • Accidents result from both misuse by children and design flaws, particularly failure to reverse.
  • 40% of tested AGDOs failed to reverse on a child-sized mannequin, indicating a significant safety gap.

Findings:

  • AGDOs pose a serious risk of severe injury or death to children.
  • Many AGDOs may not reverse upon encountering a young child.
  • A simple paper towel test allows homeowners to evaluate their AGDO's safety.

Implications:

  • Homeowners can use a paper towel test to assess AGDO safety and take corrective action.
  • Recommendations include servicing or replacing non-compliant openers and improving safety standards.
  • Implementing these measures can significantly reduce child injuries associated with AGDOs.