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

Open and closed-loop control systems01:17

Open and closed-loop control systems

1.8K
Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...
1.8K
Feedback control systems01:26

Feedback control systems

735
Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
735
Control of Power Flow01:30

Control of Power Flow

703
There are several methods to control power flow in power systems:
703
Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

435
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...
435
Control Systems01:10

Control Systems

1.9K
Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...
1.9K
Turbulent Flow01:24

Turbulent Flow

790
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
790

You might also read

Related Articles

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

Sort by
Same author

The Regenerative Effect of Trans-spinal Magnetic Stimulation After Spinal Cord Injury: Mechanisms and Pathways Underlying the Effect.

Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics·2020
Same author

Mean squared displacement in a generalized Lévy walk model.

Physical review. E·2019
Same author

Proteomic Analysis of Membrane-associated Proteins from the Breast Cancer Cell Line MCF7.

Cancer genomics & proteomics·2019
Same author

Lehmann rotation of cholesteric droplets driven by Marangoni convection.

Soft matter·2019
Same author

Taming active turbulence with patterned soft interfaces.

Nature communications·2017
Same author

Effects of glycaemic variability on cardiac remodelling after reperfused myocardial infarction: Evaluation of streptozotocin-induced diabetic Wistar rats using cardiac magnetic resonance imaging.

Diabetes & metabolism·2016

Related Experiment Video

Updated: Feb 19, 2026

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces
08:05

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

Published on: September 9, 2022

2.9K

Control of active turbulence through addressable soft interfaces.

P Guillamat1,2, J Hardoüin1,2, B M Prat1,2

  • 1Department of Materials Science and Physical Chemistry, Universitat de Barcelona, Barcelona, Catalonia.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|November 11, 2017
PubMed
Summary
This summary is machine-generated.

We controlled chaotic motion in active nematics by tuning oil interfaces. This study reveals how interfacial rheology dictates defect dynamics and flow patterns in these self-sustained systems.

More Related Videos

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
07:09

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

9.6K
Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

21.8K

Related Experiment Videos

Last Updated: Feb 19, 2026

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces
08:05

Microtensiometer for Confocal Microscopy Visualization of Dynamic Interfaces

Published on: September 9, 2022

2.9K
Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers
07:09

Fabrication of Soft Pneumatic Network Actuators with Oblique Chambers

Published on: August 17, 2018

9.6K
Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
18:11

Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

21.8K

Area of Science:

  • Soft Matter Physics
  • Active Matter Systems
  • Liquid Crystal Science

Background:

  • Active nematics exhibit complex, self-sustained flows with inherent instabilities and defect formation.
  • Controlling these flows is crucial for understanding and utilizing active matter systems.

Purpose of the Study:

  • To investigate the influence of interfacial rheology on the dynamics of kinesin/tubulin active nematics.
  • To demonstrate control over active nematic behavior by manipulating oil-interface properties.
  • To explore the transition from turbulent to laminar flow regimes.

Main Methods:

  • Experimental study of active nematics at oil interfaces with tunable rheology.
  • Utilizing a smectic-A thermotropic liquid crystal to pattern the interface.
  • Observing defect dynamics and spatiotemporal modes under varying confinement.

Main Results:

  • Interfacial rheology significantly impacts steady-state defect density and dynamics.
  • Active nematic geometry adapts to boundary conditions, transitioning between turbulent and laminar flows.
  • Flow patterns include self-assembled circular paths and reconfigurable orientations controllable by magnetic fields.
  • Spatiotemporal modes are governed by a single, tunable intrinsic length scale and topological defect requirements.

Conclusions:

  • Interfacial rheology is a key parameter for controlling active nematic behavior.
  • The observed phenomena are consistent with fundamental principles of active matter and topological defects.
  • Potential for future control strategies using tunable depleting agents.