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関連する概念動画

An Introduction to Mechanics01:28

An Introduction to Mechanics

1.8K
Humans have been making ships, shelters, pyramids, weapons, agricultural equipment, and many more items without recording the process or theory behind them for centuries. It would be challenging to document the evolution of mechanics from its origin to the present.
According to records, the history of mechanics starts with Aristotle (384–322 BC). He related mechanics to physical theory, aiming for a universal synthesis.
Newton defined mechanics as the branch of physical science that...
1.8K
Work of a Couple Moment01:12

Work of a Couple Moment

717
Mechanical engineering involves the study of motion, energy, and force, and is concerned with designing, manufacturing, and maintaining mechanical systems. One important concept in this field is the couple moment, produced by two equal and opposite forces acting at two points in a rigid body separated by a certain distance.
When the rigid body undergoes a differential displacement due to a couple, its motion can be divided into two parts: equal translation of the two points to their final...
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Machines01:19

Machines

268
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. One example of a machine is the cutting plier, which is used to cut wires by applying forces to its handles. When equal and opposite forces are exerted on the handles of the cutting plier, they cause the cutting edges to come together and apply equal and opposite reaction forces on the wire, which are greater than the applied forces.
A free-body diagram of the...
268
Residual Stresses in Bending01:18

Residual Stresses in Bending

160
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
160
Mechanical Systems01:22

Mechanical Systems

191
Mechanical systems are analogous to to electrical networks where springs and masses play similar roles to inductors and capacitors, respectively. A viscous damper in mechanical systems functions similarly to a resistor in electrical networks, dissipating energy. The forces acting on a mass in such systems include an applied force in the direction of motion, counteracted by forces from the spring, a viscous damper, and the mass's acceleration. This interplay of forces is mathematically...
191
Structural Steel Products01:24

Structural Steel Products

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Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
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関連する実験動画

Updated: Jun 24, 2025

Knowledge Based Cloud FE Simulation of Sheet Metal Forming Processes
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メカニカル・フェーズとフォームについて

Windie Höfs1, Sara A Wickström2

  • 1Department of Cell and Tissue Dynamics, Max Planck Institute for Molecular Biomedicine, Münster, Germany.

Cell
|June 7, 2024
PubMed
まとめ
この要約は機械生成です。

メセンキマ細胞は,水滴のような均一な集合体を形成し,腸形成中に上皮の折りたたみを引き起こします. この発見により 組織形態変異の新たなメカニズムが明らかになりました

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関連する実験動画

Last Updated: Jun 24, 2025

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科学分野:

  • 発達生物学
  • 細胞生物学
  • 組織工学

背景:

  • 皮質の折り畳みは 臓器の発達に不可欠です
  • エピテリア組織とメゼンキマ組織の 複雑な相互作用が必要です
  • 初期上皮質の折りたたみを引き起こす正確なメカニズムは,まだ完全に理解されていません.

研究 の 目的:

  • 腸形成におけるメゼンキマ細胞の役割を調査する.
  • 皮質の形質形成過程におけるメゼンキマ細胞の物理的行動を解明する.
  • メゼンキマの集積が表皮の折りたたみを開始する方法を理解する.

主な方法:

  • 精密顕微鏡技術を使って 細胞のメゼンキマの行動を リアルタイムで観察しました
  • 細胞間の相互作用と集積形成を分析するために計算モデルを使用した.
  • 表面上にある上皮に作用するメゼンキマの力を研究した.

主要な成果:

  • メセンキマ細胞は水滴のような振る舞いを示し,均一な集合体へと自己組織化します.
  • これらのメゼンキマ集積は,上皮の折りたたみを開始する指向された力を生み出します.
  • 均一な構造の腸の形成には,メゼンキマ細胞のパターンの集積が鍵となる.

結論:

  • メセンキマ細胞の凝結が表皮の折りたたみの主な要因である.
  • メゼンキマ細胞の物理的行動は腸内小胞の形態変異を決定する.
  • この研究は 組織発達のメカニズムに 新たな洞察をもたらします