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

The Angiosperm Life Cycle02:39

The Angiosperm Life Cycle

72.6K
Plants have a life cycle split between two multicellular stages: a haploid stage—with cells containing one set of chromosomes—and a diploid stage—with cells containing two sets of chromosomes. The haploid stage is the gamete-producing gametophyte, and the diploid stage is the spore-producing sporophyte.
72.6K
Retrovirus Life Cycles01:10

Retrovirus Life Cycles

49.7K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
49.7K
Frequency of Spring-Mass System01:17

Frequency of Spring-Mass System

7.8K
One interesting characteristic of the simple harmonic motion (SHM) of an object attached to a spring is that the angular frequency, and the period and frequency of the motion, depend only on the mass and the force constant of the spring, and not on other factors such as the amplitude of the motion or initial conditions. We can use the equations of motion and Newton's second law to find the angular frequency, frequency, and period.
Consider a block on a spring on a frictionless surface. There...
7.8K
Half-life of a Reaction02:42

Half-life of a Reaction

39.1K
The half-life of a reaction (t1/2) is the time required for one-half of a given amount of reactant to be consumed. In each succeeding half-life, half of the remaining concentration of the reactant is consumed. For example, during the decomposition of hydrogen peroxide, during the first half-life (from 0.00 hours to 6.00 hours), the concentration of H2O2 decreases from 1.000 M to 0.500 M. During the second half-life (from 6.00 hours to 12.00 hours), the concentration decreases from 0.500 M to...
39.1K
Characteristics of Life01:23

Characteristics of Life

262.0K
Biology is a natural science that studies life and living organisms, including their structure, function, development, interactions, evolution, distribution, and taxonomy. The field's scope is extensive and divided into several specialized disciplines, such as anatomy, physiology, ethology, genetics, and many more. All living things share a few key traits, including cellular organization, heritable genetic material and the ability to adapt/evolve, metabolism to regulate energy needs, the...
262.0K
The Tree of Life - Bacteria, Archaea, Eukaryotes02:40

The Tree of Life - Bacteria, Archaea, Eukaryotes

38.7K
The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
38.7K

You might also read

Related Articles

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

Sort by
Same author

Management of Anastomotic Strictures Following Roux-en-Y Hepaticojejunostomy: Our Experience.

Cureus·2026
Same author

Transforaminal epidural steroid injection versus high-volume lumbar erector spinae block in patients with low backache and radicular pain - a randomized clinical trial.

Agri : Agri (Algoloji) Dernegi'nin Yayin organidir = The journal of the Turkish Society of Algology·2025
Same author

Synthesis and characterization of TiO<sub>2</sub>-ZnO composite thin films for biomedical applications.

Biomedical materials (Bristol, England)·2025
Same author

"Rapid Atrial Swirl Sign": A Better Tool Than the Landmark Technique for Ensuring Correct Depth of Insertion of Central Venous Catheters.

Cureus·2024
Same author

Mechanical Properties, Microstructure, and Actuation Behavior of Wire Arc Additive Manufactured Nitinol: Titanium Bimetallic Structures.

3D printing and additive manufacturing·2024
Same author

A Randomized Controlled Trial Comparing the Effect of Two-Time Durations of Balloon Compression During Percutaneous Balloon Compression in Resistant Trigeminal Neuralgia.

Pain physician·2024

Related Experiment Video

Updated: Feb 6, 2026

Molecular Spring Constant Analysis by Biomembrane Force Probe Spectroscopy
08:10

Molecular Spring Constant Analysis by Biomembrane Force Probe Spectroscopy

Published on: November 20, 2021

3.4K

Life cycle analysis of electrically actuated SMA spring using Talbot interferometry.

Reena Disawal, Tameshwer Nath, Shashi Prakash

    Applied Optics
    |August 18, 2018
    PubMed
    Summary

    This study analyzes the life cycle of shape memory alloy (SMA) springs, revealing that repeated stretching and contraction cycles cause functional fatigue and reduce their ability to return to the original position.

    More Related Videos

    Fabrication Process of Silicone-based Dielectric Elastomer Actuators
    10:32

    Fabrication Process of Silicone-based Dielectric Elastomer Actuators

    Published on: February 1, 2016

    34.7K
    Free-form Light Actuators &#8212; Fabrication and Control of Actuation in Microscopic Scale
    08:17

    Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale

    Published on: May 25, 2016

    9.7K

    Related Experiment Videos

    Last Updated: Feb 6, 2026

    Molecular Spring Constant Analysis by Biomembrane Force Probe Spectroscopy
    08:10

    Molecular Spring Constant Analysis by Biomembrane Force Probe Spectroscopy

    Published on: November 20, 2021

    3.4K
    Fabrication Process of Silicone-based Dielectric Elastomer Actuators
    10:32

    Fabrication Process of Silicone-based Dielectric Elastomer Actuators

    Published on: February 1, 2016

    34.7K
    Free-form Light Actuators &#8212; Fabrication and Control of Actuation in Microscopic Scale
    08:17

    Free-form Light Actuators — Fabrication and Control of Actuation in Microscopic Scale

    Published on: May 25, 2016

    9.7K

    Area of Science:

    • Materials Science
    • Mechanical Engineering
    • Optical Metrology

    Background:

    • Shape memory alloys (SMAs) are advanced materials known for their ability to return to a predetermined shape when subjected to an external stimulus.
    • Reliability testing through life cycle analysis is crucial for engineering applications of SMAs.
    • Functional fatigue, leading to displacement drift, is a key concern in the long-term performance of SMA components.

    Purpose of the Study:

    • To perform a life cycle analysis of a shape memory alloy (SMA) spring.
    • To quantify the displacement drift and functional fatigue in SMA springs subjected to repeated actuation cycles.
    • To evaluate the reliability and performance degradation of SMA springs over extended use.

    Main Methods:

    • Utilized the Talbot interferometric technique for precise measurement of displacement drift.
    • Employed a He-Ne laser and Ronchi gratings to generate moiré patterns for interferogram analysis.
    • Analyzed fringe rotation in interferograms to determine the angle of orientation, a function of displacement drift.

    Main Results:

    • Measured displacement drift values increased with the number of stretching/contraction cycles, reaching 1.859 mm after 5000 cycles.
    • Observed a clear deterioration of the SMA effect, indicating a loss of original shape recovery capability.
    • Quantified the expanded uncertainty in measurements to be 201.61 μm.

    Conclusions:

    • Repeated actuation cycles lead to significant functional fatigue and degradation in SMA spring performance.
    • The Talbot interferometric technique provides a reliable method for assessing SMA spring reliability and quantifying performance loss.
    • SMA springs exhibit reduced shape recovery ability with increased usage, impacting their suitability for long-term applications.