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関連する概念動画

Neural Circuits01:25

Neural Circuits

3.0K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
3.0K
Sum and Difference OpAmps01:22

Sum and Difference OpAmps

1.5K
Operational amplifiers (op-amps) are versatile devices that extend beyond amplification. In this context, two specific op-amp configurations are explored: the summing and difference amplifiers.
A summing amplifier, or an adder, utilizes an op-amp to merge multiple input signals into a single output signal. When audio signals are introduced into its input channels, the input resistors initiate currents that traverse feedback resistors, resulting in an output voltage. Applying Kirchhoff's current...
1.5K
Integrator and Differentiator01:13

Integrator and Differentiator

1.8K
Op-amp circuits have significant applications in various fields, including automotive engineering. One such application is cruise control systems in cars, where op-amp circuits are integral for maintaining a constant speed. In these systems, op-amps function as both integrators and differentiators.
An integrator within an op-amp circuit produces an output directly proportional to the integral of the input signal. This is achieved by replacing the feedback resistor in a typical inverting...
1.8K
Second-order Op Amp Circuits01:19

Second-order Op Amp Circuits

675
Implementing second-order low-pass filters in audio systems is crucial in refining audio signals by eliminating undesirable high-frequency noise. These filters typically involve second-order op-amp circuits configured as voltage followers, encompassing two nodes with distinct storage elements.
The analysis of such circuits follows a systematic approach, similar to the second-order RLC circuits. In practical scenarios, bulky inductors are rarely employed due to their size and weight. This means...
675
Design Example01:23

Design Example

698
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
698
Block Diagram Reduction01:22

Block Diagram Reduction

727
The process of deriving the transfer function of a control system often involves reducing its block diagram to a single block. This simplification can be achieved through a series of strategic operations, including relocating branch points and comparators. These operations preserve the overall function of the system while allowing for easier manipulation and combination of blocks.
The first step in this process is the identification and relocation of a branch point. A branch point, where a...
727

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関連する実験動画

Updated: May 2, 2026

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

Published on: June 6, 2012

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アーキテクチャに依存するノイズは,機能的に類似した差異化回路を区別します.

Tolga Cağatay1, Marc Turcotte, Michael B Elowitz

  • 1Green Center for Systems Biology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.

Cell
|October 27, 2009
PubMed
まとめ
この要約は機械生成です。

異なる遺伝子回路設計により,同様の結果が得られるが,建築的変異は細胞ノイズに影響する. この研究は,遺伝子調節ネットワークのノイズ特性によって制御される時的精度と応答範囲の間のトレードオフを明らかにしています.

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Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
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関連する実験動画

Last Updated: May 2, 2026

Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach
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Behavioral Determination of Stimulus Pair Discrimination of Auditory Acoustic and Electrical Stimuli Using a Classical Conditioning and Heart-rate Approach

Published on: June 6, 2012

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Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns
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科学分野:

  • システム生物学 システム生物学
  • 合成生物学 合成生物学とは
  • 微生物学 微生物学とは

背景:

  • 遺伝子調節回路は,異なるアーキテクチャにもかかわらず,似たようなダイナミックな行動を示すことができます.
  • 細胞プロセスにおける特定の回路アーキテクチャの選択原理を理解することは極めて重要です.

研究 の 目的:

  • 特定の遺伝子回路アーキテクチャが細胞プロセスに選ばれる理由を調査する.
  • 本来のバチルス・サブティリスの能力規制回路を,エンジニアリングされた代替 (SynEx) と比較する.

主な方法:

  • ネイティブ遺伝子回路と人工遺伝子回路のインシリコとインビボ比較分析.
  • タイムラップ顕微鏡を用いて,細胞動力学と分化を測定する.
  • ストキャスティック変動 (ノイズ) と,回路機能への影響の評価.

主要な成果:

  • 設計されたSynEx回路は,ネイティブのBacillus subtilis回路の能力ダイナミクスと差別化生理学を複製した.
  • 回路の間の建築的違いは,ストキャスティック変動 (ノイズ) の明確なパターンにつながった.
  • 騒音特性は,能力のタイミングとDNA濃度に対するシステムの反応に選択的に影響した.

結論:

  • 代替回路アーキテクチャから生じる異なるノイズプロファイルは,機能的な違いを生み出します.
  • 時間の精度と,ノイズの特徴によって支配される生理学的反応の範囲の間のトレードオフが存在します.
  • これは,遺伝子調節回路の機能的出力を形成する上で騒音の重要性を強調しています.