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関連する概念動画

Frequency of Spring-Mass System01:17

Frequency of Spring-Mass System

7.4K
One interesting characteristic of the simple harmonic motion (SHM) of an object attached to a spring is that the angular frequency, and the period and frequency of the motion, depend only on the mass and the force constant of the spring, and not on other factors such as the amplitude of the motion or initial conditions. We can use the equations of motion and Newton's second law to find the angular frequency, frequency, and period.
Consider a block on a spring on a frictionless surface. There...
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Nonlinear Pharmacokinetics: Causes of Nonlinearity01:22

Nonlinear Pharmacokinetics: Causes of Nonlinearity

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Nonlinearity in drug pharmacokinetics is caused by various factors influencing how a drug is absorbed, distributed, metabolized, and excreted. Understanding these nonlinear processes is crucial for predicting drug behavior in the body and optimizing drug dosing regimens.
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
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Drug Distribution as One-Compartment Model and Elimination by Nonlinear Pharmacokinetics: Overview01:25

Drug Distribution as One-Compartment Model and Elimination by Nonlinear Pharmacokinetics: Overview

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Drug administration can occur through various routes, each of which may result in a different process of elimination. This process is often mixed with nonlinear and linear processes. It's important to understand that a single drug can be metabolized into different metabolites through parallel processes.
For instance, consider the metabolism of sodium salicylate. This compound is metabolized into two distinct substances: a glucuronide and a glycine conjugate. The rate of conjugation depends...
338
Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model01:13

Parameters Affecting Nonlinear Elimination: Zero-Order Input, First-Order Absorption and Two-Compartment Model

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Drugs administered through various routes can lead to nonlinear elimination, resulting in complex pharmacokinetic behaviors crucial to understanding efficacious drug dosing.
When a drug is administered through a constant intravenous infusion and eliminated via nonlinear pharmacokinetics, it follows zero-order input. For example, oral drugs undergo first-order absorption upon administration and are eliminated through nonlinear pharmacokinetics.
In the case of subcutaneously administered drugs,...
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Nonlinear Pharmacokinetics: Overview01:19

Nonlinear Pharmacokinetics: Overview

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Nonlinear or dose-dependent pharmacokinetics is a phenomenon that occurs when the pharmacokinetic parameters of certain drugs deviate from linear pharmacokinetics at higher doses. These drugs do not follow the expected first-order kinetics, where the rate of drug elimination is directly proportional to the drug concentration. Instead, they exhibit a nonlinear relationship, which can be attributed to several factors.
Nonlinearity can arise due to the saturation of plasma protein-binding or...
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Physical and Chemical Properties of Matter02:57

Physical and Chemical Properties of Matter

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The characteristics that enable us to distinguish one substance from another are called properties.
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関連する実験動画

Updated: Jan 21, 2026

Deciphering the Structural Effects of Activating EGFR Somatic Mutations with Molecular Dynamics Simulation
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身体活動中の非線形乳房ダイナミクスシミュレーションのための多方向質量-ばね-ダンパーモデル

Ruixin Liang1, Hongyi Xia1, Jingyi Ma1

  • 1School of Fashion and Textiles, The Hong Kong Polytechnic University, Kowloon, Hong Kong Special Administrative Region (SAR).

Computer methods in biomechanics and biomedical engineering
|January 20, 2026
PubMed
まとめ

新しい3D非線形質量-ばね-ダンパー（MSD）モデルは、ランニングなどの活動中の乳房の生体力学を正確にシミュレートします。この高度なモデルは、研究および臨床用途に実用的なツールを提供します。

キーワード:
乳房シミュレーション生体力学質量-ばね-ダンパーモデル

さらに関連する動画

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
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Deciphering the Structural Effects of Activating EGFR Somatic Mutations with Molecular Dynamics Simulation
15:05

Deciphering the Structural Effects of Activating EGFR Somatic Mutations with Molecular Dynamics Simulation

Published on: May 20, 2020

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Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
06:37

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package

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Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion
09:32

Subject-specific Musculoskeletal Model for Studying Bone Strain During Dynamic Motion

Published on: April 11, 2018

10.2K

科学分野:

  • 生体力学
  • 計算モデリング
  • ヒト生理学

背景:

  • 動的な活動中の乳房の生体力学は、複雑な非線形ダイナミクスを示します。
  • 従来の1Dモデルでは、これらの複雑な動きを正確に捉えることができません。
  • 乳房の動きを理解するためには、洗練されたモデルが必要です。

研究 の 目的:

  • 乳房ダイナミクスをシミュレートするための3D非線形質量-ばね-ダンパー（MSD）モデルを開発および検証すること。
  • 乳房の生体力学的シミュレーションの精度を向上させること。
  • 研究および臨床用途に実用的なツールを提供すること。

主な方法:

  • 16個のばね、16個のダンパー、および9個の質量ブロックを備えた3D非線形MSDモデルを開発しました。
  • 組織の不均一性と多方向変位の再現を統合しました。
  • 5 km/hのランニングモーションキャプチャデータに対して反復キャリブレーションを通じてモデルパラメータを最適化しました。
  • 独立した10 km/hのランニングデータを使用してモデルを検証しました。

主要な成果:

  • シミュレーションされた変位軌跡は実験データと密接に一致しました。
  • すべての3つの方向（X、Y、Z）で平均相対誤差3％未満を達成しました。
  • 複雑な乳房の生体力学を確実にシミュレートするモデルの能力を実証しました。

結論:

  • データ駆動型のパラメータ最適化によって強化された、計算効率の高い3D MSDモデルは、乳房の生体力学を正確にシミュレートします。
  • このモデルは、乳房の生体力学研究のための新規かつ実用的なアプローチを提供します。
  • 臨床設定および生体力学工学における潜在的な有用性が強調されています。