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関連する概念動画

Members Made of Elastoplastic Material01:19

Members Made of Elastoplastic Material

393
The behavior of elastoplastic materials under bending stresses, particularly in structural members with rectangular cross-sections, is crucial for predicting material responses and understanding failure modes. Initially, when a bending moment is applied, the stress distribution across the section follows Hooke's Law and is linear and elastic. This distribution means the stress increases from the neutral axis to the maximum at the outer fibers, up to the elastic limit.
As the bending moment...
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Genetic Material01:20

Genetic Material

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Within the human body, a complex and detailed system of trillions of cells works in unison to sustain life. Each cell houses a nucleus, which contains 46 chromosomes divided into 23 pairs. Chromosomes are highly coiled structures made of the genetic material DNA. These chromosomes are essential carriers of genetic information, with half inherited from the mother through her egg and the other half from the father's sperm, combining to create the unique genetic makeup of an individual.
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Bending of Members Made of Several Materials01:11

Bending of Members Made of Several Materials

608
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each material's...
608
Bending of Material: Problem Solving01:09

Bending of Material: Problem Solving

524
In this lesson, determine the ratio of the maximum bending moments applied to two metal pipes, given that both pipes can withstand a maximum stress of 100 MPa. Both pipes have an outer radius of 1.8 cm. Pipe A has an inner radius of 1.5 cm, and Pipe B has an inner radius of 1 cm. The ratio of the maximum bending moment applied to two metallic pipes, each with a different inner and outer radius, is determined by considering their dimensions. The inner radius of the first pipe is 1.5 cm, and for...
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Control System Problem01:21

Control System Problem

427
In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
427
Circular Shafts - Elastoplastic Materials01:24

Circular Shafts - Elastoplastic Materials

487
The study of solid circular shafts under stress shows that within the elastic limit, stress increases directly to the distance from the shaft's center. This relationship holds until the shaft reaches a critical point of stress, beyond which it begins to yield, marking the transition from elastic to plastic deformation. At this crucial juncture, the maximum torque the shaft can endure without permanent deformation is determined, signifying the limit of its elastic behavior.
As torque on the...
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関連する実験動画

Updated: Jan 30, 2026

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
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モイレ材料のトポロジカルなチェーン数に対する光学制御

O Huber1, K Kuhlbrodt1, E Anderson2

  • 1Institute for Quantum Electronics, ETH Zürich, Zürich, Switzerland.

Nature
|January 28, 2026
PubMed
まとめ

研究者は,歪んだMoTe2 (t-MoTe2) ホモバイラーでスピンバレー特性の光学的なスイッチングを実証しました. このブレークスルーにより,光を用いた鉄磁気状態とトポロジカル・オーダーの動的制御が可能になり,量子回路の扉が開く.

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科学分野:

  • 量子物質物理 量子物質物理学
  • 凝縮物質物理学 凝縮物質物理学
  • マテリアルサイエンス 材料科学

背景:

  • 量子物質の光学制御は,帯トポロジーや超伝導性などの特性のダイナミックチューニングを提供します.
  • 強く相関する電子系における安定状態の光学制御を達成することは,依然として課題です.

研究 の 目的:

  • 歪んだMoTe2 (t-MoTe2) ホモバイラーにおけるスピンバレー自由度の光学スイッチングを実証する.
  • 強く相関する相のダイナミック制御を調査する. チェーン断熱器や鉄磁気金属を含む.

主な方法:

  • 曲げられたMoTe2 (t-MoTe2) ホモバイラーを使用し,平らな谷をコントラストするチェーン帯を使用しました.
  • 循環的に偏光された光でエクシトン-ポラロン移行の共振刺激を使用した.

主要な成果:

  • 様々な相関が強い段階でのスピンバレー方向の光学スイッチングが成功裏に実証されました.
  • 外部磁場なしでフェロマグネティックスピン状態のダイナミック逆転を示した.
  • トポロジカル・オーダーパラメータに対するダイナミック・コントロールの証拠を提供した.

結論:

  • 鉄磁気スピン状態の非熱的光学スイッチングが可能である.
  • トポロジカル・オーダー・パラメータのダイナミック・コントロールが可能で,新しい量子技術を可能にします.
  • キラルエッジモードとトポロジカル量子回路の光学生成の道を開いた.