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関連する概念動画

Intracellular Signaling Cascades01:24

Intracellular Signaling Cascades

53.8K
Once a ligand binds to a receptor, the signal is transmitted through the membrane and into the cytoplasm. The continuation of a signal in this manner is called signal transduction. Signal transduction only occurs with cell-surface receptors, which cannot interact with most components of the cell, such as DNA. Only internal receptors can interact directly with DNA in the nucleus to initiate protein synthesis. When a ligand binds to its receptor, conformational changes occur that affect the...
53.8K
Rab Cascades01:25

Rab Cascades

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Rab GTPases act in a regulated cascade during membrane fusion, helping the lipid bilayers mix. The Rab family of proteins are active when bound to GTP, and inactive when bound to GDP. Hence, they act as guanine nucleotide-dependent molecular switches. Rab-GTP recognizes and binds to long or short-range tethering proteins to capture the target vesicle. These tethers coordinate with SNAREs on the vesicle and the target membrane to assemble the trans SNARE complex that locks the mixing bilayers.
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Veins as Blood Reservoirs01:10

Veins as Blood Reservoirs

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Veins, while chiefly responsible for circulating blood back to the heart, also function as storage vessels for blood. They house approximately 64 percent of the body's total blood volume, a feat made possible by their high capacitance—the inherent ability to expand and accommodate large volumes of blood, even under low pressure. The large diameter and thin walls of veins augment their distensibility, significantly more so than arteries, due to their classification as capacitance...
8.0K
Amplifying Signals via Enzymatic Cascade01:22

Amplifying Signals via Enzymatic Cascade

18.7K
When a ligand binds to a cell-surface receptor, the receptor's intracellular domain changes shape, which may either activate its enzyme function or allow its binding to other molecules. The initial signal is amplified by most signal transduction pathways. This means that a single ligand molecule can activate multiple molecules of a downstream target. Proteins that relay a signal are most commonly phosphorylated at one or more sites, activating or inactivating the protein. Kinases catalyze...
18.7K
MAPK Signaling Cascades01:07

MAPK Signaling Cascades

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Mitogen-activated protein kinase, or MAPK pathway, activates three sequential kinases to regulate cellular responses such as proliferation, differentiation, survival, and apoptosis. The canonical MAPK pathway starts with a mitogen or growth factor binding to an RTK. The activated RTKs stimulate Ras, which recruits Raf or MAP3 Kinase (MAPKKK), the first kinase of the MAPK signaling cascade. Raf further phosphorylates and activates MEK or MAP2 Kinases (MAPKK), which in turn phosphorylates MAP...
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Cascaded Op Amps01:16

Cascaded Op Amps

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Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
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関連する実験動画

Updated: Feb 16, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.8K

フォトニック・リザーバー・コンピューティングのためのカスケードインターフェロメーター・マイクロレソナー構造.

Amideddin Mataji-Kojouri1, Sebastian Kühl2, Mohammad Seifi Laleh2

  • 1Integrated Photonic Devices Group, Chair of RF and Photonics Engineering, TU Dresden, Helmholzstr. 18, 01069, Dresden, Germany. amideddin.mataji_kojouri@tu-dresden.de.

Scientific reports
|February 14, 2026
PubMed
まとめ

この研究は,マッハ・ゼンダー干渉計とマイクロリング共振器を使用して,より速い光子貯蔵庫計算方法を導入しています. このアプローチは,シリコンに依存せずに高速コンピューティングを実現します.

キーワード:
オプティカル・コンピューティングフォトニック集積回路についてフォトニック信号の均等化貯水池コンピューティングシリコンマイクロリング共振器

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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

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Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
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Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

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関連する実験動画

Last Updated: Feb 16, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
07:42

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

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Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging
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Uncovering Hidden Dynamics of Natural Photonic Structures Using Holographic Imaging

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科学分野:

  • フォトニクス フォトニクスとは
  • オプティカル・コンピューティング
  • 非線形ダイナミクス 非線形ダイナミクス

背景:

  • フォトニック・リザーバー・コンピューティングは,複雑なシステムのダイナミクスを利用して計算を行います.
  • シリコン光子貯蔵庫のためのオンチップ遅延エレメントの実装は,非線形効果の時間スケールに一致する遅延が必要であるため,困難です.
  • 既存のシリコンベースの方法は,速度と複雑性の限界に直面しています.

研究 の 目的:

  • 高速光子貯蔵庫コンピューティングシステムを開発する.
  • シリコンの非線形性と長い遅延線の限界を克服するために.
  • 振幅/相調節と非線形性に対する光検出を用いた遅延ベースの光子貯蔵庫を調査する.

主な方法:

  • 時間を遅らせる光子貯蔵庫のシミュレーション.
  • マッハ・ゼンダー干渉計とマイクロリング共振器を用いたものです.
  • 電子出力層にデジタルメモリを組み込む.

主要な成果:

  • 達成された計算速度は,非線形ベースのシリコン貯蔵庫よりもほぼ1倍の速度です.
  • スピードは主にシリコンの非線形性ではなく,モデュレーション/検出帯域幅によって制限されます.
  • NARMA-10,Mackey-Glass,およびSanta-Feの予測タスク (NMSE 0.002-0.05) で正確なパフォーマンスを実証しました.

結論:

  • 提案されているタイムデレイの光子貯水池は,速度に大幅な優位性をもたらします.
  • このアーキテクチャは,シリコンの非線形効果に依存することなく,効率的な光子貯蔵庫コンピューティングを可能にします.
  • このシステムは,複雑な予測作業と,光通信信号の均等化を行うことができます.