Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Thin-Walled Hollow Shafts01:15

Thin-Walled Hollow Shafts

601
In analyzing a thin-walled hollow shaft subjected to torsional loading, a segment with width dx is isolated for examination. Despite its equilibrium state, this segment faces torsional shearing forces at its ends. These forces are quantitatively described by the product of the longitudinal shearing stress on the segment's minor surface and the area of this surface, leading to the concept of shear flow. This shear flow is consistent throughout the structure, indicating a uniform distribution of...
601
Plane Potential Flows01:23

Plane Potential Flows

1.0K
Plane potential flows simplify fluid motion by assuming the fluid to be irrotational and incompressible. These characteristics allow these flows to be described by a velocity potential function, ϕ, representing the flow speed in a given direction, and a stream function, ψ, that visualizes the flow path, both governed by Laplace's equation. These parameters help in estimating flow patterns, velocity distributions, and pressure fields around various hydraulic structures.
Uniform...
1.0K
Rolling Without Slipping01:09

Rolling Without Slipping

5.5K
People have observed the rolling motion without slipping ever since the invention of the wheel. For example, one can look at the interaction between a car's tires and the surface of the road. If the driver presses the accelerator to the floor so that the tires spin without the car moving forward, there must be kinetic friction between the wheels and the road's surface. If the driver slowly presses the accelerator, causing the car to move forward, the tires roll without slipping. It is...
5.5K
Irrotational Flow01:28

Irrotational Flow

1.1K
Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
1.1K
Characteristics of Fluids01:20

Characteristics of Fluids

8.4K
When a force is applied parallel to the top surface of a solid, it resists the applied force due to the internal frictional forces between the layers of the solid known as shearing resistance. However, when the force is removed, the shearing forces restore the original shape of the solid. Other deformation forces also cause temporary changes in shape if the forces are not beyond a threshold magnitude. Solids tend to retain their shape, making the study of their rest and motion easier. Beyond...
8.4K
Couette Flow01:22

Couette Flow

1.2K
Couette flow represents the flow of fluid between two parallel plates, with one plate fixed and the other moving with a constant velocity. This configuration allows for a simplified analysis using the Navier-Stokes equations, which govern fluid motion under conditions of viscosity and incompressibility. For Couette flow, the assumptions include a steady, laminar, incompressible flow with a zero-pressure gradient in the flow direction. This flow type is beneficial for understanding shear-driven...
1.2K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Searching for physical principles of morphogenesis.

Development (Cambridge, England)·2025
Same author

Topology and kinetic pathways of colloidosome assembly and disassembly.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

ROS inhibits microtubule dynamics and cell growth heterogeneity during Arabidopsis sepal morphogenesis.

bioRxiv : the preprint server for biology·2025
Same author

Active Fluids Form System-Spanning Filamentary Networks.

Physical review letters·2025
Same author

The 2025 motile active matter roadmap.

Journal of physics. Condensed matter : an Institute of Physics journal·2025
Same author

The geometric basis of epithelial convergent extension.

eLife·2024
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
関連記事をすべて見る

関連する実験動画

Updated: Feb 24, 2026

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
08:04

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

Published on: November 26, 2019

7.6K

アクティブ・ソリッド: トポロジカル・デフェクト 自動推進 流れなし

Fridtjof Brauns1, Myles O'Leary2, Arthur Hernandez3

  • 1Kavli Institute for Theoretical Physics, University of California, Santa Barbara, Santa Barbara, California 93106, USA.

Physical review letters
|February 22, 2026
PubMed
まとめ
この要約は機械生成です。

活性固体における自走トポロジカル欠陥は,フローではなく,テクスチャリモデリングで移動する. この新しいメカニズムは,活性流体とは異なり,組織形態変異と再生を説明する可能性がある.

さらに関連する動画

Forming, Confining, and Observing Microtubule-Based Active Nematics
08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

3.2K
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

18.0K

関連する実験動画

Last Updated: Feb 24, 2026

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
08:04

Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature

Published on: November 26, 2019

7.6K
Forming, Confining, and Observing Microtubule-Based Active Nematics
08:37

Forming, Confining, and Observing Microtubule-Based Active Nematics

Published on: January 13, 2023

3.2K
Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
12:26

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

18.0K

科学分野:

  • ソフトマター物理学 ソフトマター物理学
  • マテリアルサイエンス 材料科学
  • バイオフィジックス 生物物理学

背景:

  • 活性ネマティック流体におけるトポロジカル・デフェクトは,生成する流域により自己推進を示す.
  • 固体のような活性物質の欠陥ダイナミクスを理解することは,生物学的プロセスにとって極めて重要です.

研究 の 目的:

  • ネマティック活性固体における自走トポロジカル欠陥の最小モデルを提案し分析する.
  • 活性ストレスの有る弾性介質における欠陥運動のメカニズムを解明する.

主な方法:

  • ネマティック活性固体の最小理論モデルの開発.
  • ネマティックテクスチャーと弾性ストレインの結合から生じる欠陥ダイナミクスの分析.
  • 欠陥ペアの解き放つと安定化の調査.

主要な成果:

  • 自走 +1/2 欠陥は,アドベクションとは独立して,局所的なネマティックテクスチャの改造によって移動します.
  • このメカニズムは,活性ネマティック流体における自己推進と根本的に異なる.
  • このモデルは,欠陥ペアの解き放たれと+1欠陥の安定化を予測しています.

結論:

  • 活性固体における欠陥自己推進は,局所質感改造という新しいメカニズムによって発生する.
  • このメカニズムは,筋肉繊維のような形態変異の過程で,指向的順序の再構成についての洞察を提供します.
  • この発見は,Hydra.のような組織再生における欠陥の運動性と融合を説明するかもしれない.