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

Agonism and Antagonism: Quantification01:14

Agonism and Antagonism: Quantification

714
When drugs are administered, they can elicit either an agonist or antagonist effect on the body. Agonism occurs when a drug activates a specific receptor, triggering a biological response. On the other hand, antagonism happens when a drug binds to the same receptors but blocks their activation, thereby preventing a biological response.
To quantify these effects, researchers use a dose-response curve, which provides valuable information about the potency and efficacy of a drug. Potency refers to...
714
Machines: Problem Solving II01:30

Machines: Problem Solving II

477
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
477
Competition02:34

Competition

23.0K
When organisms require the same limited resources within an environment, they may have to compete for them. Competition is a net-negative interaction. Even if two competing individuals or populations do not interact directly, the overall fitness of both competitors is lowered as a result of not having full access to the limited resource.
23.0K
Machines: Problem Solving I01:22

Machines: Problem Solving I

509
A toggle clamp is a mechanical device commonly used for holding and clamping objects in various applications, such as woodworking, metalworking, and assembly operations. Consider a toggle clamp subjected to a force of 200 N at the handle. The vertical clamping force can be calculated, provided the dimensions of the toggle clamp are known.
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
509
Statically Indeterminate Problem Solving01:16

Statically Indeterminate Problem Solving

563
Statically indeterminate problems are those where statics alone can not determine the internal forces or reactions. Consider a structure comprising two cylindrical rods made of steel and brass. These rods are joined at point B and restrained by rigid supports at points A and C. Now, the reactions at points A and C and the deflection at point B are to be determined. This rod structure is classified as statically indeterminate as the structure has more supports than are necessary for maintaining...
563
Masking and Demasking Agents01:19

Masking and Demasking Agents

3.0K
EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
There are many masking agents, such as cyanide, fluoride, triethanolamine, thiourea, and 2,3-bis(sulfanyl)propan-1-ol (formerly 2,3-dimercapto-1-propanol), with the masking agent chosen based on...
3.0K

You might also read

Related Articles

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

Sort by
Same author

Analysis of the impact of gene evolution on reproductive effects reveals prevalent sexual and germline-soma conflicts.

Nature ecology & evolution·2026
Same author

A flexible and unified framework for single- and multi-outcome Mendelian randomization using summary statistics.

American journal of human genetics·2026
Same author

Granulocyte-macrophage colony-stimulating factor at work: Promoting vascular maturation for accelerated wound healing.

Molecular and cellular probes·2026
Same author

Individual and Common Attack: Enhancing Transferability in VLP Models Through Modal Feature Exploitation.

IEEE transactions on image processing : a publication of the IEEE Signal Processing Society·2026
Same author

A centroid iterative method for fitting the femoral neck axis in rotational osteotomy: a finite element analysis and biomechanical investigation.

Journal of hip preservation surgery·2025
Same author

Integrative Mendelian randomization for detecting exposure-by-group interactions using group-specific and combined summary statistics.

PLoS genetics·2025
Same journal

Robust Semiglobal and Global Stabilization for Nonlinear Normal Form Systems by Time-Varying Feedback.

IEEE transactions on cybernetics·2026
Same journal

Adaptive Global Asymptotic Output Stabilization of Uncertain Nonlinear Systems Under Dynamic State/Input Quantization.

IEEE transactions on cybernetics·2026
Same journal

Accelerated Distributed Gradient Tracking for Constrained Aggregative Optimization Over Time-Varying Digraphs.

IEEE transactions on cybernetics·2026
Same journal

Small-Gain-Based Plug-and-Play Distributed Control Framework for DC Microgrids With Decentralized Reconfiguration.

IEEE transactions on cybernetics·2026
Same journal

Prescribed-Time Impulsive Control of High-Order Integrator Systems.

IEEE transactions on cybernetics·2026
Same journal

Relaxed Stability Conditions for Model Predictive Control of Hybrid Dynamical Systems Using Hybrid Recurrent Neural Networks.

IEEE transactions on cybernetics·2026
See all related articles

Related Experiment Video

Updated: Nov 4, 2025

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
05:58

Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

Published on: August 29, 2018

9.1K

Adversarial CAPTCHAs.

Chenghui Shi, Xiaogang Xu, Shouling Ji

    IEEE Transactions on Cybernetics
    |May 25, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces adversarial CAPTCHA generation to enhance security. The developed aCAPTCHA system improves defenses against automated attacks while maintaining user-friendliness.

    More Related Videos

    Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
    11:15

    Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

    Published on: February 20, 2014

    13.3K
    Generating Strictly Controlled Stimuli for Figure Recognition Experiments
    05:39

    Generating Strictly Controlled Stimuli for Figure Recognition Experiments

    Published on: March 18, 2019

    5.4K

    Related Experiment Videos

    Last Updated: Nov 4, 2025

    Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking
    05:58

    Using Rapid Serial Visual Presentation to Measure Set-Specific Capture, a Consequence of Distraction While Multitasking

    Published on: August 29, 2018

    9.1K
    Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze
    11:15

    Automated Visual Cognitive Tasks for Recording Neural Activity Using a Floor Projection Maze

    Published on: February 20, 2014

    13.3K
    Generating Strictly Controlled Stimuli for Figure Recognition Experiments
    05:39

    Generating Strictly Controlled Stimuli for Figure Recognition Experiments

    Published on: March 18, 2019

    5.4K

    Area of Science:

    • Computer Science
    • Cybersecurity
    • Artificial Intelligence

    Background:

    • CAPTCHA systems are crucial for distinguishing humans from bots online.
    • Existing adversarial example generation techniques offer potential for CAPTCHA security enhancement.
    • The need for robust, human-verifiable CAPTCHAs against sophisticated automated attacks is increasing.

    Purpose of the Study:

    • To investigate and develop adversarial methods for generating more secure CAPTCHAs.
    • To compare adversarial CAPTCHA generation with existing adversarial image research.
    • To create a comprehensive system for generating and evaluating adversarial CAPTCHAs.

    Main Methods:

    • Proposed a framework for text-based and image-based adversarial CAPTCHA generation.
    • Developed the aCAPTCHA system integrating preprocessing, attack, and generation methods.
    • Conducted extensive security and usability evaluations of generated adversarial CAPTCHAs.

    Main Results:

    • Adversarial CAPTCHAs significantly improve security over normal CAPTCHAs.
    • The usability of adversarial CAPTCHAs remains comparable to traditional ones.
    • The aCAPTCHA system demonstrates effectiveness in generating robust adversarial CAPTCHAs.

    Conclusions:

    • Adversarial CAPTCHA generation is a viable strategy to bolster online security.
    • The open-sourced aCAPTCHA system facilitates further research in CAPTCHA security.
    • The findings highlight a path towards more resilient automated public Turing tests.