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関連する概念動画

Feedback Inhibition00:46

Feedback Inhibition

57.4K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
57.4K
Feedback Loops01:01

Feedback Loops

64.8K
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
64.8K
Effects of feedback01:24

Effects of feedback

1.1K
Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
1.1K
Feedback control systems01:26

Feedback control systems

732
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...
732
Facial Feedback Hypothesis01:24

Facial Feedback Hypothesis

686
Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
686
Cell Signaling Feedback Loops01:07

Cell Signaling Feedback Loops

7.4K
Positive and negative feedback loops are crucial for regulating biological signaling systems. These feedback loops are processes that connect output signals to their inputs.
Negative feedback loops
Most signaling systems have negative feedback loops that can perform different functions such as output limiter, and adaptation.
Output limiter
Upon receiving an input signal, the cellular response rapidly increases until a threshold is reached. Beyond this threshold, a negative feedback loop...
7.4K

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関連する実験動画

Updated: Feb 15, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.8K

感度が向上したNPROレーザーフィードバックインターフェロメーター

Wenxun Li, Chunzhao Ma, Weitong Fan

    Optics letters
    |February 13, 2026
    PubMed
    まとめ
    この要約は機械生成です。

    この研究では,非平面環振動レーザーフィードバックインターフェロメーターの活性磁気安定化が導入され,周波数安定性が大幅に改善され,騒音のある環境でも正確な振動検出が可能になりました.

    さらに関連する動画

    Control of Eating Behavior Using a Novel Feedback System
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    Control of Eating Behavior Using a Novel Feedback System

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    Movement Retraining using Real-time Feedback of Performance
    08:16

    Movement Retraining using Real-time Feedback of Performance

    Published on: January 17, 2013

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    関連する実験動画

    Last Updated: Feb 15, 2026

    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    9.8K
    Control of Eating Behavior Using a Novel Feedback System
    04:48

    Control of Eating Behavior Using a Novel Feedback System

    Published on: May 8, 2018

    11.7K
    Movement Retraining using Real-time Feedback of Performance
    08:16

    Movement Retraining using Real-time Feedback of Performance

    Published on: January 17, 2013

    13.9K

    科学分野:

    • 光学とフォトニック
    • 精度の高い測定法です.
    • 振動センサーによる振動感知

    背景:

    • 非平面環振動レーザーフィードバック干渉計 (NPRO-LFI) は,ピコメーター下振動検出を提供します.
    • 外部磁気騒音はNPRO-LFIの周波数安定性と高精度のアプリケーションを制限します.

    研究 の 目的:

    • NPRO-LFIのためのアクティブな磁気安定化技術を開発する.
    • 周波数安定性を高め,NPRO-LFIの適用範囲を拡大する.

    主な方法:

    • 電磁石を用いたアクティブな磁気安定化システムを実装しました.
    • 安定した自己混合周波数 (SMF) のクローズドループ制御が採用されました.
    • 評価された振動検出能力と回転速度測定の精度.

    主要な成果:

    • 614kHzのSMFで1mHzで10^5の磁気騒音抑制比を達成しました.
    • 4 Hzから100 kHzまでの振動検知が有効で,偏差が<0.17 Hzである.
    • 弱光検出限界12.2fWと,回転速度測定の誤差1.53%を示した.

    結論:

    • アクティブ・マグネティック・スタビリゼーションは,騒々しい環境でのNPRO-LFI性能を大幅に改善します.
    • 強化されたNPRO-LFIシステムは,弱いフィードバック下での高精度,長距離センサーを可能にします.
    • この進歩により,NPRO-LFIの適用範囲は,厳しい測定シナリオに拡大されます.