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

Errors in Taping01:18

Errors in Taping

50
Errors in taping arise from multiple factors that can significantly impact measurement accuracy in surveying. Misalignment of the tape, often due to human error, is one primary source. A skilled rear tapeman, using a telescope, can help correct alignment by guiding the head tapeman; however, human limitations still lead to small inaccuracies. These errors may include misplacement of pins or inaccurate tape readings due to common visual confusions, such as mistaking a six for a nine. Such...
50
Taping Over Different Ground Profiles01:12

Taping Over Different Ground Profiles

48
Taping over varying ground profiles requires careful adaptation to achieve accurate measurements. On smooth, level ground with minimal vegetation, the tape can rest directly on the ground. Here, the taping team, typically consisting of a head and a rear tapeman, coordinates their positions with clear communication. The rear tapeman holds the tape at the starting point and guides the head tapeman toward a range pole placed beyond the endpoint, using hand or voice signals to ensure alignment.On...
48
Detection of Gross Error: The Q Test01:00

Detection of Gross Error: The Q Test

6.2K
When one or more data points appear far from the rest of the data, there is a need to determine whether they are outliers and whether they should be eliminated from the data set to ensure an accurate representation of the measured value. In many cases, outliers arise from gross errors (or human errors) and do not accurately reflect the underlying phenomenon. In some cases, however, these apparent outliers reflect true phenomenological differences. In these cases, we can use statistical methods...
6.2K
Leaky Scanning02:28

Leaky Scanning

5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA.  Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.2K
Mismatch Repair01:36

Mismatch Repair

40.3K
Overview
40.3K
Types of Errors: Detection and Minimization01:12

Types of Errors: Detection and Minimization

1.7K
Error is the deviation of the obtained result from the true, expected value or the estimated central value. Errors are expressed in absolute or relative terms.
Absolute error in a measurement is the numerical difference from the true or central value. Relative error is the ratio between absolute error and the true or central value, expressed as a percentage.
Errors can be classified by source, magnitude, and sign. There are three types of errors: systematic, random, and gross.
Systematic or...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Genotype-Dependent Variations in Egg Quality and Nutritional Composition of Thermotolerant Chickens Under Hot-Climate Conditions.

Food science & nutrition·2026
Same author

Small Intestinal Bacterial Overgrowth: Microbiome Dysregulation, Gut-Brain Axis Disruption, and Systemic Consequences.

Molecular nutrition & food research·2026
Same author

Germination-driven biochemical remodeling of cereals and pseudocereals: Impacts on nutrient bioaccessibility, phytochemical enrichment, and functional food potential.

Food chemistry·2026
Same author

Exploring the antimicrobial potential of plant-based bioactive compounds in meat products: advances in mechanistic insights, pathogen inhibition, and shelf-life extension.

Critical reviews in food science and nutrition·2026
Same author

Botulinum toxin from foodborne hazard to aesthetic and biomedical tool: mechanisms, applications, detection strategies, and future perspectives.

Archives of microbiology·2026
Same author

Postbiotics and paraprobiotics in food biochemistry mechanisms stability and nutritional applications.

NPJ science of food·2026
Same journal

Overcoming thermodynamic limitations on anaerobic methanogenesis via DSF/c-di-GMP enhanced indirect interspecies electron transfer.

Water research·2026
Same journal

Microplastics from catchment to offshore: Salinity gradients and seasonal discharge control estuarine trapping efficiency and tidal reimport.

Water research·2026
Same journal

Selective phosphate recovery from acidic phosphogypsum leachate via Fe(III) precipitation for lithium iron phosphate precursor production.

Water research·2026
Same journal

Microplastic sedimentary records in a shallow lake of North China: Identifiable responses to hydrological and socio-economic drivers.

Water research·2026
Same journal

From end-use characterization to decentralized reuse design: Closing the data-to-system gap.

Water research·2026
Same journal

Light parameters and iron ions regulate mass-independent fractionation via modulating degradation pathways of methylmercury.

Water research·2026
See all related articles

Related Experiment Video

Updated: Jul 21, 2025

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
00:09

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

5.6K

Time-reversal technique for pipeline defect detection.

Muhammad Waqar1, Moez Louati1, Mohamed S Ghidaoui1

  • 1Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Sai Kung, New Territories, Hong Kong.

Water Research
|July 27, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a time-reversal (TR) technique for detecting pipeline defects like leaks and blockages using transient waves. The method accurately locates, classifies, and estimates the size of discrete pipe flaws, even with low signal-to-noise ratios.

Keywords:
Defect detectionImagingTime-reversalWater supplyWater-hammer

More Related Videos

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
05:11

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

Published on: June 27, 2025

65
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
11:34

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

11.2K

Related Experiment Videos

Last Updated: Jul 21, 2025

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
00:09

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

5.6K
High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
05:11

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition

Published on: June 27, 2025

65
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography
11:34

Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography

Published on: May 15, 2017

11.2K

Area of Science:

  • Engineering
  • Applied Physics
  • Signal Processing

Background:

  • Pressurized fluid-filled pipelines are critical infrastructure.
  • Detecting discrete defects such as leaks and blockages is essential for pipeline integrity.
  • Existing methods may struggle with accuracy and robustness in complex pipe systems.

Purpose of the Study:

  • To propose and validate a novel time-reversal (TR) technique for detecting discrete defects in pipelines.
  • To decouple defect localization from defect sizing.
  • To enhance detection accuracy and robustness by truncating pressure head signals.

Main Methods:

  • Utilized the one-dimensional wave equation for defect detection.
  • Employed active transient waves for pipeline analysis.
  • Performed numerical simulations and laboratory experiments for validation.
  • Conducted sensitivity analysis on wave speed and signal-to-noise ratio (SNR).

Main Results:

  • Accurate localization, classification, and size estimation of single, multiple, and mixed-type defects (leaks and blockages).
  • Successful validation in both elastic and visco-elastic pipe systems.
  • Demonstrated robustness even with signal-to-noise ratios as low as 0 dB.

Conclusions:

  • The proposed time-reversal technique offers a robust and accurate solution for pipeline defect detection.
  • The method effectively handles complex defect scenarios and varying pipe material properties.
  • Signal truncation enhances the reliability of defect characterization.