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

Sign Test for Matched Pairs01:17

Sign Test for Matched Pairs

411
The sign test for matched pairs offers a robust method for comparing two paired samples, often for the effects of an intervention in one of them. This method is very useful in situations where the underlying distribution of the data is unknown. The test compares two related samples—often pre- and post-treatment measurements on the same subjects—to determine if there are significant differences in their median values.
To conduct the sign test, we first calculate the differences in...
411
Wilcoxon Signed-Ranks Test for Matched Pairs01:09

Wilcoxon Signed-Ranks Test for Matched Pairs

495
The Wilcoxon signed-rank test for matched pairs evaluates the null hypothesis by combining the ranks of differences with their signs. It essentially tests whether the median of the differences in a population of matched pairs is zero. Since the test incorporates more information than the sign test, it generally yields more trustable conclusions. This test also does not require the data to follow a normal distribution, but two conditions must be met for it to be applicable: (1) the data must...
495
Layers of the Epidermis01:21

Layers of the Epidermis

8.2K
The epidermis, the outermost layer of the skin, is composed of several distinct layers. From deep to superficial, the layers of the epidermis are as follows:
Stratum Basale
Stratum basale, also known as the stratum germinativum, is the deepest layer of the epidermis. It is composed of a single layer of actively dividing cells called basal cells or basal keratinocytes. These cells constantly undergo cell division to replenish the upper layers of the epidermis. Additionally, melanocytes, which...
8.2K
Transducer Mechanism: Nuclear Receptors01:31

Transducer Mechanism: Nuclear Receptors

2.5K
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
2.5K
Thematic Layering in GIS01:30

Thematic Layering in GIS

351
In the past, planning projects such as schools or public facilities required extensive manual effort to gather and compile data. Information such as property boundaries, soil characteristics, road networks, zoning regulations, and flood zones had to be sourced individually from courthouses, utility providers, and registry offices. Assembling these datasets into a coherent format often took several months, delaying project timelines.The introduction of Geographic Information Systems (GIS)...
351
Transducer Mechanism: G Protein–Coupled Receptors01:30

Transducer Mechanism: G Protein–Coupled Receptors

4.1K
G Protein–Coupled Receptors (GPCRs) are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to various stimuli. GPCRs regulate critical physiological pathways and are excellent drug targets for treating diseases such as diabetes, cancer, obesity, depression, or Alzheimer's. Nearly 35% of approved drugs implement their therapeutic effects by selectively interacting with specific GPCRs.
GPCRs are also called heptahelical,...
4.1K

You might also read

Related Articles

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

Sort by
Same author

Carrier-free water-soluble porphyrin nanoparticles as highly effective photosensitizers for photodynamic therapy.

Journal of materials chemistry. B·2026
Same author

Deep Strain-Mediated Thermal Transport in Silicon Nanowires.

Nano letters·2025
Same author

Giant Piezoelectricity and Excellent Thermal Sensitivity in Er Doped PSN-PMN-PT via Texturing-Driven Crystal Field Engineering.

Small methods·2025
Same author

Gd and Zr Co-Doped BiFeO<sub>3</sub> Magnetic Nanoparticles for Piezo-Photocatalytic Degradation of Ofloxacin.

Nanomaterials (Basel, Switzerland)·2025
Same author

A water-soluble fluorescent probe based on porphyrin derivatives for Cu<sup>2+</sup> detection in aqueous solution and living cells.

Analytical methods : advancing methods and applications·2025
Same author

Composite Scheme for Deferred Thermal Depolarization of Lead-Free Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-Based Piezoelectric Ceramics.

ACS applied materials & interfaces·2024

Related Experiment Video

Updated: Jan 31, 2026

Designing Silk-silk Protein Alloy Materials for Biomedical Applications
11:14

Designing Silk-silk Protein Alloy Materials for Biomedical Applications

Published on: August 13, 2014

18.9K

Magnesium Alloy Matching Layer for High-Performance Transducer Applications.

Yulei Wang1, Jingya Tao2, Feifei Guo3

  • 1National Engineering Research Center of Light Alloy Net Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. vincent_dec@sjtu.edu.cn.

Sensors (Basel, Switzerland)
|December 19, 2018
PubMed
Summary

Magnesium alloy (AZ31B) effectively matches PZT-5H ultrasonic transducers, improving performance. This study demonstrates AZ31B as a superior alternative for high-performance ultrasonic transducer applications.

Keywords:
magnesium alloymatching layerultrasonic transducer

More Related Videos

Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing
06:12

Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing

Published on: April 28, 2023

2.4K
An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
14:51

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature

Published on: September 23, 2018

7.4K

Related Experiment Videos

Last Updated: Jan 31, 2026

Designing Silk-silk Protein Alloy Materials for Biomedical Applications
11:14

Designing Silk-silk Protein Alloy Materials for Biomedical Applications

Published on: August 13, 2014

18.9K
Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing
06:12

Plasma Polishing as a New Polishing Option to Reduce the Surface Roughness of Porous Titanium Alloy for 3D Printing

Published on: April 28, 2023

2.4K
An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature
14:51

An Available Technique for Preparation of New Cast MnCuNiFeZnAl Alloy with Superior Damping Capacity and High Service Temperature

Published on: September 23, 2018

7.4K

Area of Science:

  • Materials Science
  • Acoustics Engineering
  • Ultrasonic Transducer Technology

Background:

  • Acoustic impedance mismatch is a key limitation in ultrasonic transducer efficiency.
  • Traditional matching layers often involve complex composites.
  • Optimizing the transducer's acoustic interface is crucial for signal transmission.

Purpose of the Study:

  • To investigate magnesium alloy (AZ31B) as an acoustic matching material for PZT-5H ultrasonic transducers.
  • To evaluate the performance of transducers fabricated with AZ31B.
  • To compare AZ31B performance against existing matching layer materials.

Main Methods:

  • Designing and fabricating two PZT-5H ultrasonic transducers using AZ31B as the matching layer.
  • Characterizing transducer performance, including center frequency, -6 dB bandwidth, and two-way insertion loss.
  • Applying double matching layer theory to assess acoustic impedance matching in a water medium.

Main Results:

  • AZ31B exhibits an acoustic impedance of 10.3 MRayl, suitable for PZT-5H transducers in water.
  • Fabricated transducers achieved center frequencies of 4.6 MHz and 9.25 MHz.
  • The 4.6 MHz transducer showed a 79% bandwidth and -11.11 dB insertion loss; the 9.25 MHz transducer had a 71% bandwidth and -14.43 dB insertion loss.

Conclusions:

  • Magnesium alloy (AZ31B) provides a good acoustic impedance match for PZT-5H transducers.
  • Transducers utilizing AZ31B demonstrate superior performance compared to those with composite matching layers.
  • AZ31B presents a promising alternative material for developing high-performance ultrasonic transducers.